Answer:
just write 6t and the same
A car has an intial velocity of 50 km hr after 5 h, its final velocity is 70 km hr. solve for the car acceleration
Answer:
4 km/hr^2
Explanation:
We can use the formula for acceleration:
a = (v_f - v_i) / t
where:
a = acceleration
v_f = final velocity
v_i = initial velocity
t = time taken
Substituting the given values, we get:
a = (70 km/hr - 50 km/hr) / 5 hr
a = 20 km/hr / 5 hr
a = 4 km/hr^2
5x, 10x and 20x objective lenses. what is the maximum total magnification that can be achieved with this microscope?
The maximum total magnification that can be achieved with a microscope that has 5x, 10x, and 20x objective lenses can be found by multiplying the magnification of the objective lens by the magnification of the eyepiece lens.
What is Magnification?This can be expressed as:
Magnification = objective lens magnification × eyepiece lens magnification
The eyepiece lens magnification is typically 10x for most microscopes, so we can simply find the maximum total magnification by multiplying each objective lens magnification by 10 and then adding them together:
Maximum Total Magnification = (5 × 10) + (10 × 10) + (20 × 10)
Maximum Total Magnification = 50 + 100 + 200
Maximum Total Magnification = 350
Therefore, the maximum total magnification that can be achieved with this microscope is 350x.
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The NASA Space Launch System rocket that will carry the Artemis mission to the Moon travels 500 feet (152 m) straight up in the first 7 seconds of flight. It weighs 5.75 million pounds (mass of 2.61e6 kg).In this problem, we'll calculate the total force the rockets are providing. The numbers will be randomized slightly. Since the rocket is using fuel, the question is an approximation anyway.What is the weight of the rocket, if its mass is 2.46E+6 kg? Assume g = 9.8 m/s2.At launch, the rocket travels upwards at an acceleration of 5.51 m/s2. This tells us that it must be acted on by a net force of 1.36E+7 N. If that is the net upward force, what is the total upward force provided by the engines?
The weight of the rocket, with a mass of 2.46E+6 kg, is equal to the force of gravity acting on the rocket, which is the mass multiplied by the acceleration due to gravity and the upward force of its own and its is calculated as 26,716,460 N.
At launch, the total upward force provided by the engines is equal to the net upward force of 1.36E+7 N, as the rocket accelerates upwards at [tex]5.51 m/s^2[/tex]. This is the force required to overcome the rocket's weight, as well as the drag from the atmosphere and the force of the fuel pushing the rocket forward.
The NASA Space Launch System rocket that will carry the Artemis mission to the Moon travels 500 feet (152 m) straight up in the first 7 seconds of flight. It weighs 5.75 million pounds (mass of 2.61e6 kg).
The formula to calculate the weight of the rocket, if its mass is 2.46E+6 kg is given by
[tex]W= 2.46E+6 kg * 9.8 m/s^2\\= 24,108,000 Newtons[/tex]
Here g is the acceleration due to gravity, [tex]g=9.8m/s^2[/tex].
At launch, the rocket travels upwards at an acceleration of 5.51 m/s². This tells us that it must be acted on by a net force of 1.36E+7 N. If that is the net upward force, the total upward force provided by the engines would be the sum of the upward force provided by the engines and the upward force provided by gravity, so:
[tex]F_{upward}=1.36E+7 N + 2.46E+6 kg * 5.51 m/s^2\\ = 26,716,460 N[/tex]
Therefore, the total upward force provided by the engines is 26,716,460 N.
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write an expression for the magnitude of the force, f, exerted on the firefighter by the pole. answer in terms of the variables from the problem statement as well as g for the acceleration due to gravity.
The expression for the magnitude of the force exerted on the firefighter by the pole can be expressed as F = mg + ma.
Where m is the mass of the firefighter,
g is the acceleration due to gravity, and
a is the acceleration of the pole
In order to find an expression for the magnitude of the force, F, exerted on the firefighter by the pole, we need to consider the forces acting on the firefighter.
According to Newton's second law of motion, the force acting on an object is equal to its mass multiplied by its acceleration. In this case, the forces acting on the firefighter are the gravitational force, which is pulling the firefighter downwards with a force of mg, and the force exerted on the firefighter by the pole, which is pushing the firefighter upwards with a force of ma. Therefore, the total force acting on the firefighter is given by the sum of these two forces, which is: F = mg + ma
Thus, this expression gives us the magnitude of the force exerted on the firefighter by the pole. Here, m is the mass of the firefighter, g is the acceleration due to gravity, and a is the acceleration of the pole. if the pole is not accelerating (i.e., if a = 0), then the expression reduces to F = mg, which is the gravitational force acting on the firefighter.
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consider an ideal brayton cycle executed between the pressure limits of 1200 kpa and 100 kpa and temperature limits of 20 c and 1000 c with argon as the working fluid. the temperature at the exit of the compressor in celsius is
The temperature at the exit of the compressor is 1446.64 K or 1173.49 °C
The ideal Brayton cycle is executed between the pressure limits of 1200 kPa and 100 kPa and temperature limits of 20 °C and 1000 °C with argon as the working fluid.
The temperature at the exit of the compressor in Celsius is:
The Ideal Brayton cycle is a thermodynamic cycle that describes how to convert heat and pressure into work, and it has two reversible adiabatic processes and two reversible isobaric processes. A Brayton cycle is a cycle in which a gas turbine engine operates.In general, the Brayton cycle consists of the following four processes:
1) Adiabatic Compression
2) Constant Pressure Heating
3) Adiabatic Expansion
4) Constant Pressure Cooling
The temperature at the exit of the compressor in Celsius can be computed using the ideal gas equation.
Ideal gas law is given by
[tex]P V = n R T[/tex]
Where, P = Pressure
V = Volume
N = Number of moles of the gas
R = Universal gas constant
T = Temperature
At the exit of the compressor, the pressure is 1200 kPa and the temperature is 20 °C or 293 K.
[tex]P V = n R T_1[/tex]
[tex]T_1 = PV / nR[/tex]
Substituting the values, we get,
[tex]T_1[/tex] = 1200 × 10³ × 0.1 / (1 × 8.314) = 1446.64 K
The temperature at the exit of the compressor is 1446.64 K or 1173.49 °C.
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If we were to double the radius of the wire and re-suspend the weight, which of the following would be correct.A)The strain experienced by the wire would increase by a factor of 4.B)Young's modulus would increase by a factor of 4.C)The stress experienced by the wire would decrease by a factor of 4.D) The strain experienced by the wire would increase by a factor of 4.E)The strain experienced by the wire would increase by a factor of 2.F)Young's modulus would be reduced by a factor of 4.
If we were to re-suspend the weight and double the wire's radius, The strain experienced by the wire would decrease by a factor of 2 will be correct.
It is an elastic modulus that describes the stress and strain of a material when subjected to elastic deformation under tension or compression.
It characterizes the material's elasticity (i.e., elastic modulus) and is one of the most important mechanical properties of solids.
The formula for strain is ε = ΔL/L.
The original length is denoted by L, while the change in length is denoted by ΔL.
The formula for Young's modulus is E = σ / ε. E is Young's modulus, σ is the stress, and ε is the strain.
The S.I. unit of Young's modulus is Pascals (Pa).
Therefore, The strain experienced by the wire would decrease by a factor of 2 will be correct.
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escribe the motion of a proton (a) after it is released from rest in a uniform electric field. describe the
The motion of a proton after it is released from rest in a uniform electric field is that it will move in a straight line. The direction of motion of a proton will be towards the direction of the electric field. The speed of the proton will increase with time. This is because the proton experiences a force due to the electric field. The force on a proton is given by F = qE,
Where:
F is the force. q is the charge on the proton. E is the electric field.The acceleration of the proton is given by a = F/m, where m is the mass of the proton. The velocity of the proton after a time t is given by v = at. The position of the proton after a time t is given by x = 1/2at^2 + x0, where x0 is the initial position of the proton.
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29.If Sally is attempting to develop muscular endurance in her legs, the mostbeneficial range of repetitions she should perform in her three sets of legextensions is_____________.
A.4-8 repetitions
B.6-15 repetitions
C.10-15 repetitions
D.12-20 repetitions
The most beneficial range of repetitions Sally should perform in her three sets of leg extensions if she is attempting to develop muscular endurance in her legs is 12-20 repetitions. Thus, the correct option is D.
What is muscular endurance?Muscular endurance is the ability of the muscles to perform continuously without being fatigued. It helps you maintain a specific body posture or position over an extended period or perform repeated movements over time. Muscular endurance is an essential component of fitness and an essential aspect of most sports.
The goal of training to develop muscular endurance is to condition the muscles to perform repeated contractions over an extended period. Muscular endurance is an essential aspect of any resistance training program. To develop muscular endurance, Sally should perform high repetitions of an exercise with lighter weight loads.
12-20 repetitions in each set are generally used to develop muscular endurance for most exercises, as this range can be accomplished with a light enough weight to avoid muscle fatigue while still providing the necessary stimulation to enhance endurance.
Therefore, the correct option is D.
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A ________ is a descriptive research activity representing a small-scale investigation of 10 to 30 subjects that are representative of the main study's defined target population but focus on a specific subcomponent of the main study.
Multiple Choice
median
pretest
pilot test
pilot study
mode
A d.pilot study is a descriptive research activity representing a small-scale investigation of 10 to 30 subjects that are representative of the main study's defined target population but focus on a specific subcomponent of the main study.
A pilot study is a small-scale study that is usually carried out before the main study or trial to test if the intended study design, data collection method(s), measurement instruments, and data analysis techniques are feasible and sufficient. This is also done to ensure that data is collected in a way that minimizes the risk of error in the main study.
Mode, the most frequently occurring value in a data set is referred to as the mode. It is frequently utilized with categorical or nominal data. Pretest, before the test, a pretest is given to test subjects to establish a baseline for their knowledge or capability. Median, in statistics, the median is a measure of central tendency that is used to split a dataset into two equal parts. It is used with continuous or ordinal data.
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a planet is discovered that causes a 0.03% drop in brightness for a 2 solar mass star. what is the size of this planet?
This planet must be quite small, as a 0.03% drop in brightness corresponds to a small size.
To calculate the size of the planet, you would need to know the radius of the star and the distance of the planet from the star. With that information, you can calculate the size of the planet using the formula:
Size = (Brightness drop x Distance²) / (4 x pi x Radius²)
So, to find the size of this planet, you would need to know the radius of the 2 solar mass stars and the distance of the planet from the star.
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the flowing movement of water or air in a certain direction called
A current is a flow of water or air that is moving in one direction. A current refers to the flow of a fluid in a certain direction, such as the movement of water or air.
A fluid, like water or air, flowing in one direction is known as a current in nature. From tiny streams to massive ocean currents that can cross entire ocean basins, currents can occur on a variety of scales. Many elements, including as temperature variations, wind patterns, and the rotation of the Earth, influence these fluid movements. Ocean currents are particularly significant because by moving heat and nutrients around the planet, they have a significant impact on determining the Earth's climate. Certain ocean currents, like the Gulf Stream, can significantly change local weather patterns and even have an impact on the earth's climate. Thus, it is crucial for many scientific disciplines, such as meteorology, oceanography, and marine biology, to comprehend and monitor currents.
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a thin cord is wrapped around a grindstone of radius 0.30 m and mass 25 kg supported by bearings that produce negligible friction torque. the cord exerts a steady 20-n tension force on the grindstone, causing it to accelerate from rest to 60 rad/s in 12 s. determine the rotational inertia of the grindstone.
The rotational velocity of the grindstone was 60 rad/s after 12 s, the rotational inertia of the grindstone is 3.75 kg m². Rotational inertia depends upon mass and radius.
What is the rotational inertia of the grindstone?The rotational inertia, I, of the grindstone is 3.75 kg m². And can be determined using the following equation:I = 1/2 × m × r².
here m is the mass of the grindstone (25 kg) and r is the radius of the grindstone (0.30 m).
Thus, the rotational inertia of the grindstone is: I = 1/2 × 25 kg × (0.30 m)² = 3.75 kg m².
The steady 20 N tension force on the grindstone provides a torque that can be determined using the equation: Torque = r × F where r is the radius of the grindstone (0.30 m) and F is the tension force (20 N).
Therefore, the torque on the grindstone is
Torque = 0.30 m × 20 N = 6
Using the equation for rotational acceleration, the rotational acceleration, α, of the grindstone can be determined:
α = Torque / I where Torque is the torque on the grindstone (6 Nm) and I is the rotational inertia (3.75 kg m²).
Thus, the rotational acceleration of the grindstone is: α = 6 Nm / 3.75 kg m2 = 1.6 rad/s²
Using the equation for rotational velocity, the rotational velocity, ω, of the grindstone can be determined:
ω = α × t
Since, the rotational velocity of the grindstone was 60 rad/s after 12 s, the rotational inertia of the grindstone is 3.75 kg m².
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what force (magnitude and direction) does the seat exert on a 53.0-kg child when the rider is halfway between top and bottom?
The seat will exert a downward force of 494.5 N [magnitude] in the direction of the child's motion [direction] on a 53.0-kg child when the rider is halfway between the top and bottom of the ride.
This can be calculated using the equation F = mg, where m is the mass of the child (53.0 kg) and g is the acceleration due to gravity (9.81 m/s²). Therefore, F = (53.0 kg) x (9.81 m/s²) = 494.5 N. The direction of the force is always in the direction of the child's motion, which in this case is downward.
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emptying a half-full cylindrical tank suppose the water tank in exercise 36 is half full of water. determine the work required to empty the tank by pumping the water to a level 2 m above the top of the tank. answer
The work required to empty the cylindrical tank that is half full of water by pumping the water to a level 2 m above the top of the tank is 19695.61897 J.
To determine the work required to empty the cylindrical tank that is half full of water by pumping the water to a level 2m above the top of the tank, the following steps can be followed:
Find the volume of the water in the tank as follows:
V = (πr²h)/2, where V is the volume of water, r is the radius of the cylindrical tank, and h is the height of water in the tank.
Substituting the values given in the question,
V = (π × (0.8 m)² × 1 m)/2 = 1.00530965 m³
Now find the mass of the water as follows:-
The density of water = 1000 kg/m³
Mass = Density × Volume = 1000 kg/m³ × 1.00530965 m³ = 1005.30965 kg
Next, find the potential energy of the water:-
PE = m*g*h, where m is the mass of the water, g is the acceleration due to gravity, and h is the height of the water above the top of the tank.
Substituting the values given in the question,
PE = 1005.30965 kg × 9.81 m/s² × 2 m = 19695.61897 J
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A torsion pendulum is made from a disk of mass m = 7. 1 kg and radius r = 0. 71 m. A force of f = 42. 4 n exerted on the edge of the disk rotates the disk 1/4 of a revolution from equilibrium
A disc with a mass of 7.1 kg and a radius of 0.71 m is used to create a torsion pendulum. A force of f = 42. 4 n applied to the disk's edge causes the disc to spin 1/4 turn away from equilibrium. The torsion pendulum has a 12.1 Nm torque.
We use the following equation to get the torque on the torsion pendulum: The formula is: = r F sin(), where is the torque, r is the disk's radius, F is the force acting on the disk's edge, and is the angle at which the disc is rotating.
The values obtained by substituting the supplied values are: = 0.71 m 42.4 N sin(90°/4) 12.1 Nm.
As a result, 12.1 Nm of torque is applied to the torsion pendulum.
In physics, a system is said to be in equilibrium when neither its internal energy state nor its state of motion tend to vary over time.
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Eight little spheres of mercury coalesce to form a single sphere. Compared to the combined surface areas of the eight little spheres, the surface area of the big sphere is? the same
greater
less
The surface area of the big sphere is greater than the combined surface areas of the eight little spheres. Therefore, the correct option is option 2.
When eight small spheres coalesce to form a single large sphere, the surface area of the large sphere is greater than the combined surface area of the eight small spheres. The coalescence of eight small spheres into a single large sphere occurs when eight small spheres combine into a single large sphere.
If we were to add up the surface area of each of the 8 small spheres, we would obtain:
8 × 4πr² = 32πr².
If we were to add up the surface area of the large sphere, we would obtain:
4πR²
where R is the radius of the large sphere.
Note that R is greater than r because the sum of the small spheres' surface area is smaller than that of the large sphere.
The formula for the surface area of a sphere is A = 4πr².
As a result, the surface area of the large sphere is greater than the combined surface area of the eight little spheres. Therefore, compared to the combined surface areas of the eight little spheres, the surface area of the big sphere is greater.
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Chris jumps off a bridge with a bungee cord (a heavy stretchable cord) tied around his ankle. (Figure 1). He falls for 15 in before the bungee cord begins to stretch. Chris's mass is 79 kg and we assume the cord obeys Hooke's law. F = - kx, with 60 N/m. If we neglect air resistance, estimate what distance d below the bridge Chris's foot will be before coming to a stop. Ignore the mass of the cord (not realistic, however) and treat Chris as a particle. Express your answer to two significant figures and include the appropriate units.
Answer:
d=54 m
Explanation:
a neutral metal sphere is touched to a negatively charged metal rod. As a result the sphere will be_____ and the metal rod will be ________ . Fill in the gaps
a. positively charger. b.negatively charger. c. neutral. d. none
A neutral metal sphere is touched to a negatively charged metal rod. As a result the sphere will be a. positively charged and the metal rod will be b. negatively charged.
When a neutral metal sphere is touched to a negatively charged metal rod, the sphere will be positively charged, and the metal rod will be negatively charged. The process of charging through contact is known as contact electrification, triboelectrification, or electrostatic induction. It occurs when two different materials come into contact and exchange electrons, causing one of them to become positively charged and the other to become negatively charged.
As a result, a neutral metal sphere is touched to a negatively charged metal rod, the negatively charged rod donates some of its electrons to the sphere, giving it a net positive charge. The metal sphere will repel positively charged objects and attract negatively charged objects due to the positive charge it has acquired. The negatively charged rod will repel negatively charged objects and attract positively charged objects due to the negative charge it has acquired. Hence, the correct option is a. positively charged and b. negatively charged.
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According to the Layers of Diversity graphic in your text, there are three levels of diversity in every group. Which of the following dimensions is included in the third (external) dimension? a) Personality and values b) Race and age c) Physical characteristics and abilities d) Education and religion According to Layers of Diversity graphic in your text, there are three levels of diversity in every group.
According to the Layers of Diversity graphic in your text, there are three levels of diversity in every group. The third (external) dimension includes physical characteristics and abilities.
What are Layers of Diversity? The layer of diversity is a theoretical framework that describes human beings' numerous dimensions of diversity. The model categorizes the components of diversity into three levels: internal, external, and organizational.
Internal Dimension: Includes characteristics over which people have little control, such as gender, age, race, and sexual orientation.
External Dimension: Includes characteristics over which people have more control, such as physical abilities, income, work experience, education, religion, and geographical location.
Organizational Dimension: Includes components that are specific to the company, such as a person's job or the department in which they operate.
What is the third layer of diversity? The third layer of diversity is the external dimension, which includes characteristics that are acquired or chosen. Physical characteristics and abilities, such as height, weight, and physical health, are among the dimensions covered in this level. Education, work experience, religion, and geographical location are among the other components that make up this level.
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A therm is a unit of measure for gas. Mrs Schertz’ natural gas usage was 74 therms for the month of March. 49 therms were charged at the baseline charge of $0.74/therm and 25 therms were charged at over baseline charge of $0.98 per therm.
a) What was the total price of the natural gas for the month?
b) There are 4 people living in her home. How many therms per capita?
To calculate the total price of natural gas for the month, we need to multiply the number of therms charged at the baseline rate by the baseline rate and the number of therms charged at the over baseline rate by the over baseline rate, and then add these two amounts together.
So, the total cost of natural gas for the month is:
49 therms x $0.74/therm + 25 therms x $0.98/therm
= $36.26 + $24.50 = $60.76
Therefore, the total price of natural gas for the month was $60.76.
To calculate the therms per capita, we need to divide the total number of therms used by the number of people living in Mrs. Schertz's home.
So, the therms per capita is:
74 therms / 4 people = 18.5 therms/person
Therefore, the therms per capita for Mrs. Schertz's household is 18.5 therms per person.
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Identify which of the following forces act on the bicycle + rider system, and sort them accordingly Drag the appropriate items to their respective binsgravitynormal forcestatic fractionair resistancekinetic fractionrolling friction
The forces that act on the bicycle + rider system are Gravity, normal force, static friction, kinetic friction, air resistance, and rolling friction.
The force that pulls objects toward the center of a planet or another body is called gravity. All the planets are maintained in their orbits around the sun due to the force of gravity.
The force surfaces exert to prevent solid objects from passing through one another is known as the normal force.
When there is no relative motion between the object and the surface, a body is subject to a particular form of friction force known as static friction.
The forces that oppose the motion of an object as it travels through the air are known as air resistance.
A force called rolling friction opposes a rolling object's motion on a surface. Rolling resistance is another name for rolling friction.
Hence, Gravity, normal force, static friction, kinetic friction, air resistance, and rolling friction are the forces acting on the bicycle and rider system.
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a baseball is hit almost straight up into the air with a speed of estimate (a) how high it goes, (b) how long it is in the air. (c) what factors make this
A baseball is hit almost straight up into the air with a speed, the greater the ball's potential energy will be upon launch, resulting in a greater maximum height.
(a) The time it takes to reach the maximum height. (b) The duration of the flight can be calculated using the following formula:(c) The launch angle, initial speed, and launch height are all variables that influence how high and far the ball flies. The higher the launch angle, the higher the ball's height; the higher the initial velocity, the higher and farther the ball will travel; and the greater the launch height, the greater the ball's potential energy will be upon launch, resulting in a greater maximum height.
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open the experiment file containing your pressure-temperature data. make sure that your graph displays temperature on the horizontal axis. if the relationship between pressure and temperature appears to be linear, fit a line to your data. if not, take the necessary steps to obtain a linear relationship. 2. is it correct to state that the pressure is proportional to the celsius temperature; i.e., does a doubling of the temperature produce a doubling of the pressure? if not, then manipulate your graph (logger pro) or use your equation to determine the celsius temperature at which the pressure of a gas should drop to zero. your instructor may guide you in this process. compare your experimental value to the accepted value for this temperature. 3. write a statement relating pressure to the absolute temperature of a gas.
The absolute temperature is determined by the Kelvin scale, which is the sum of the Celsius temperature and 273.15.
What is a temperature scale?A temperature scale is a system used to measure and quantify the degree of hotness or coldness of an object or substance. It defines a set of numerical values that correspond to specific temperatures, which can be used to compare temperatures and measure changes in temperature over time.
To open the experiment file containing your pressure-temperature data, first launch the Logger Pro software. From there, you can access your file and adjust the graph's axes accordingly. If the data appears to follow a linear relationship, then fit a line to the data by clicking on the Linear Fit option from the Analyze menu. If the data does not appear to follow a linear relationship, take the necessary steps to adjust the graph and obtain a linear relationship.
It is not correct to state that the pressure is proportional to the Celsius temperature. Pressure increases as temperature increases, but it is not a linear relationship. To find the temperature at which the pressure of a gas should drop to zero, you can either manipulate the graph or use the equation to determine the Celsius temperature. Once you have obtained the temperature, compare it to the accepted value for this temperature.
The pressure of a gas is proportional to the absolute temperature of a gas. The absolute temperature is determined by the Kelvin scale, which is the sum of the Celsius temperature and 273.15.
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An increase in ocean salinity can change _______ and create a current. A) the temperature near the poles
B) the density of water
C) the Coriolis Effect
D) the wind speed across the surface
B) The density of water. An increase in ocean salinity can change The density of water and create a current.
Water's density can be altered by an increase in ocean salinity, making it heavier and denser. As the heavier water sinks and is replaced by lighter water from the surroundings, this might result in the formation of a current. A number of variables, including evaporation, precipitation, and the melting of ice caps, can contribute to the increased salinity. This shift in water density has the potential to significantly impact ocean circulation patterns, marine ecosystems, and the global climate. The flow or current produced when the denser water sinks can change the patterns of ocean circulation.
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Determine the power of water transferred each hour through the dam. 500 m² are cleared every hour. The height of the dam is 500m.
Answer:
The power of water transferred each hour through a 500m high dam if 500m² are cleared every hour is approximately 4.41 GW
Explanation:
To answer this question, we need to know the density of water, the gravitational acceleration, and the efficiency of the dam. Let's assume that the density of water is 1000 kg/m³, the gravitational acceleration is 9.81 m/s², and the efficiency of the dam is 100%.
The power of water transferred each hour through the dam is given by the formula:
Power = Flow rate x Density x Gravity x Height x Efficiency
where Flow rate is the volume of water that passes through the dam each second, Density is the density of water, Gravity is the gravitational acceleration, Height is the height of the dam, and Efficiency is the efficiency of the dam.
First, let's calculate the flow rate:
Flow rate = Area x Velocity
where Area is the cleared area of 500m² and Velocity is the speed of water passing through the dam.
Assuming that the water is moving at a constant speed, we can use the formula:
Velocity = Height / Time
where Time is the time it takes for the water to pass through the dam.
Since the height of the dam is 500m and we want to know the power transferred each hour, we can convert the time to seconds as follows:
Time = 1 hour / 3600 seconds per hour = 0.000277778 hours
So, the velocity of the water is:
Velocity = 500m / 0.000277778 hours = 1,800,000 m/s
Now we can calculate the flow rate:
Flow rate = 500m² x 1,800,000 m/s = 900,000 m³/s
Finally, we can calculate the power of water transferred each hour through the dam:
Power = Flow rate x Density x Gravity x Height x Efficiency
Power = 900,000 m³/s x 1000 kg/m³ x 9.81 m/s² x 500m x 1
Power = 4,405,500,000 watts or approximately 4.41 GW
Therefore, the power of water transferred each hour through a 500m high dam if 500m² are cleared every hour is approximately 4.41 GW.
(a) Calculate the magnitude of the angular momentum of the earth in a circular orbit around the sun. Is it reasonable to model it as a particle? (b) Calculate the magnitude of the angular momentum of the earth due to its rotation around an axis through the north and south poles, modeling it as a uniform sphere. Please show your work.
(a) Angular momentum of Earth in a circular orbit around the sun is 2.66 × 10^40 kg m^2/s. It can be modeled as a particle. (b) The angular momentum of Earth due to its rotation around an axis through the poles is 7.07 × 10^33 kg m^2/s, modeled as a uniform sphere.
An object's angular momentum, which measures its rotating motion, is essential to many physical processes. The orbit of the Earth around the sun gives rise to the first sort of angular momentum, while the rotation of the Earth about its axis produces the second. The angular momentum of the Earth's orbit around the sun is quite large, at around 2.66 1040 kg m2/s. Given that the size and form of the Earth have little bearing on its orbit, it seems sensible to treat it as a particle for this computation. In comparison, the Earth's rotation about its own axis generates angular momentum that is only about 7.07 1033 kg m2/s in size. This kind of angular momentum is calculated using the uniform sphere's moment of inertia. In several disciplines, including astronomy and geophysics, the Earth's angular momentum is a crucial number.
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which of the following best describes bedded gypsum and halite? a. varieties of coal b. varieties of calcium carbonate evaporites; c. chemical sedimentary rocks d. detrital sedimentary rocks
Halite and gypsum in beds are examples of chemical sedimentary rocks. They are often found in arid or semi-arid areas where minerals from evaporating saline liquids precipitate.
Which of the following statements accurately sums up rock salt and rock gypsum?Common chemical sedimentary rocks include limestone, rock salt, and rock gypsum. When minerals crystallise straight from water, chemical rocks are created.
Gypsum is a sort of rock, right?Gypsum is a soft, pale sedimentary rock that was created during the Silurian Period when Ohio was covered by ancient seas. It can be found as a rock in bedded layers as well as in the mineral form of selenite. Anhydrite and salt (halite, NaCl) are found interspersed with gypsum (CaSO4).
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If you walk 10.0 m horizontally forward at a constant velocity carrying a 20 N object, the amount of work you do is A) more than 200 J. B) equal to 200J C) less than 200 J, but more than 0J D) zero.
If you walk 10.0 m horizontally forward at a constant velocity carrying a 20 N object, the amount of work you do is equal to 200J. Therefore, the correct option is B.
The work done by an object is given by the equation W = Fd cos θ. In this case, a person walks 10.0 m horizontally forward at a constant velocity while carrying a 20 N object. The amount of work they do can be calculated by using the above equation.
The work done can be found by multiplying force and displacement. However, the direction of the force and the displacement matters. The force and displacement should be in the same direction. This is known as the dot product of the force and displacement.
W = F.d cos θ
Where, W = Work done, F = force in the direction of displacement, d = displacement, and θ = angle between force and displacement
The force exerted by the person is 20 N, which is acting horizontally in the direction of displacement. Therefore, θ = 0°.
Cos 0° = 1
W = F.d.1
W = 20 N.10 m
W = 200 J
Therefore, the work done by the person is 200 J. So, the correct option is B) equal to 200 J.
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the deflection plates in an oscilloscope are 10 cm by 2 cm with a gap distance of 1 mm. a 100 volt potential difference is suddenly applied to the initially uncharged plates through a 925 ohm resistor in series with the deflection plates. how long does it take for the potential difference between the deflection plates to reach 60 volts? 1.50272e-8 correct: your answer is correct. s what will the electric potential difference across the capacitor be a long time after the circuit is connected? v what will the electric potential difference across the resistor be a long time after the circuit is connected? v
It takes 1.64 µs for the potential difference between the deflection plates to reach 60 volts.The electric potential difference across the capacitor and resistor will be equal to the applied potential difference, which is 100 volts.
Data from the question: Area of deflection plates = 10 cm x 2 cm = 20 cm²
Gap distance = 1 mm = 0.1 cm
Potential difference = 100 volts
Resistor = 925 ohm
We know that the capacitance of a capacitor can be given as,
C =ε₀A/d
Where, C = Capacitance, ε₀ = Permitivity of free space, A = Area of the capacitor plates, d = Gap distance between the plates.
Now, we can calculate the capacitance of the deflection plates as,
C = ε₀A/d = 8.85 × 10^-12 x 20 / 0.1 = 1.77 × 10^-9 F
Also, we know that,C = Q/V. Putting the given values in this equation,
1.77 × 10^-9 F = Q/100V
Thus, the charge on the plates can be given as,
Q = C × V = 1.77 × 10^-9 F × 100 V = 1.77 × 10^-7 C
Now, we know that Current I = V/R, Where V = Potential difference, R = Resistance. We can calculate the current flowing through the circuit as
I = V/R = 100/925 = 0.108 A
Now, we can calculate the time taken for the potential difference to reach 60 volts as,Q = It
Charge, Q = 1.77 × 10^-7 CT = Q/I = 1.77 × 10^-7 / 0.108 = 1.64 × 10^-6 s
Thus, it takes 1.64 µs. For the potential difference between the deflection plates to reach 60 volts. As the plates of the capacitor are connected to a resistor in series, we can assume that the potential difference across the capacitor is equal to the potential difference across the resistor. Therefore, the electric potential difference across the capacitor and resistor will be equal to the applied potential difference, which is 100 volts, after a long time.
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when a three-phase motor fails due to voltage unbalance, one or two of the stator windings become blackened. the ? winding is the winding with the largest voltage unbalance.
When a three-phase motor fails due to voltage unbalance, one or two of the stator windings become blackened. The winding with the largest voltage unbalance.
The voltage unbalance in three-phase motors is the difference between the phases' voltage, which may be due to a variety of reasons. If the voltage unbalance exceeds the motor's allowable percentage, it can damage the motor or cause it to fail. Voltage unbalance in a three-phase system causes an asymmetrical current flow in the motor, resulting in motor winding damage, excessive heat, and noise, among other problems. A stator winding is a coil of wire wrapped around the stator core. The stator windings and rotor, which are mounted on the motor shaft, are the two main components of a motor.
The stator's magnetic field is produced by the stator winding when it is energized. In most electrical machines, the stator windings are usually three-phase and linked in a wye or delta pattern, it is the stator windings that are affected by voltage unbalance, causing them to become blackened. The winding with the largest voltage unbalance is the winding that will be the most affected. When a three-phase motor fails due to voltage unbalance, one or two of the stator windings become blackened, as stated in the question.
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