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Related Questions
1) A 2.5 kg ball strikes a wall with a velocity of 8.5 m/s to the left. The ball bounces off with a
velocity of 7.5 m/s to the right. If the ball is in contact with the wall for 0.25 s, what is the
constant force exerted on the ball by the wall?
Answers
Answer:
Force = -10 Newton.
Explanation:
Given the following data;
Initial velocity = 8.5m/s
Final velocity = 7.5m/s
Time = 0.25 seconds
Mass = 2.5kg
To find the force exerted;
First of all, we would determine the acceleration of the ball;
Acceleration = (v - u)/t
Acceleration =(7.5 - 8.5)/0.25
Acceleration = -1/0.25
Acceleration = -4 m/s²
Now, to find the force exerted;
Force = mass * acceleration
Force = 2.5 * -4
Force = -10 Newton
Note: The force is negative because it is an opposite reaction.
AFTER a ringing tuning fork passes very quickly in front of a stationary observer...
a) The sound waves are equally spaced out
b) The sound has a lower pitch
c) The sound waves have equal amplitudes
d) all could apply
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How are clouds related to water vapor and water droplets?
A.Water vapor in the air condenses to form tiny water droplets, and these water droplets make up clouds.
B.Water vapor in the air makes up clouds, but water vapor does not condense to form tiny water droplets that make up clouds.
C.Water vapor in the air condenses to form tiny water droplets, but the water vapor and water droplets do not make up clouds.
D.Water vapor in the air stays in the air as water vapor. The water vapor does not make up clouds, and it does not condense to form tiny water droplets.
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Answer:
A!!!!!!!!!!!!!!!!!!!!!!!!!!!!
. Rohit had only one light source in his room. He was told by his friend that he can make the room more lighted by using mirror. What type of mirror can be used for the purpose?
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Answer:
very smooth and polished glass mirror
Explanation:
The best type of mirror for this would be a very smooth and polished glass mirror. A metal mirror will also work but it would need to be extremely polished. This would allow light to efficiently be reflected across the room, thus effectively adding an "extra" light source to the room. If the mirror is not smooth then the light may become distorted and not reflect properly as it is supposed to. This may defeat the entire purpose of the mirror for this scenario.
Recall: earth applies _____________ on Earth or equivalently
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Answer:
gravitational attraction
A box of mass 5.0 kg is initially at rest. A 500 N force causes it to move horizontally through a
distance of 12.00 m. How much work would there be?
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Answer:
Workdone = 6000Nm
Explanation:
Given the following data;
Mass = 5kg
Force = 500N
Distance = 12m
To find the work done;
Workdone = force * distance
Workdone = 500 * 12
Workdone = 6000Nm
These are the reactant in a chemical equation: 6 CO2 + 6 H2O --> C6H12O6 + 6 O2
Answers
Answer:
Carbon Dioxide and Water.
Explanation:
This is the chemical formula for photosynthesis!
Five independent measurements are made of the diameter of a cylinder. Results, in mm, are: 21.8; 21.6; 22.1; 21.9; 22.1. What should be the reported value of the cylinder's diameter?
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Answer: 21.9 mm
Explanation:
Given that five independent measurements are made of the diameter of a cylinder. Results, in mm, are: 21.8; 21.6; 22.1; 21.9; 22.1. What should be the reported value of the cylinder's diameter?
The measurement of the diameter of cylinder is measured several time in order to reduce the uncertainty called random error.
The reported value of the cylinder's diameter should be the average or the mean value of the whole measurement.
That is
Mean = (21.8 + 21.6 + 22.1 + 21.9 + 22.1) ÷ 5
Mean = 109.5 ÷ 5
Mean = 21.9 mm
Therefore, the reported value of the cylinder diameter will be 21.9 mm
A body vibrates 100 times in 20 seconds. Find its frequency and time period.
plz answer this its urgent
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Answer:
Vibrates 5 times a / every second
Explanation:
PLEASE HELPP IL GIVE BRAINLY AND HEART
if the land warms faster than the sea during the day, which breeze is experienced ( Assume during the day and that the land asd sea do not have the same temperature. )
A) Sea breeze
B ) Land breeze
C ) No breeze
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Answer:
sea breeze
Explanation:
Answer:
A sea breeze
Explanation:
What is mass? (Specific simple answer)
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Answer:
Mass is the quantity of substance in an object
Use the following information about Earth and its moon to determine the distance between them. Earth's mass = 6.0 x 1024 kg Moon's tangential speed = 1,025 m/s Earth's radius = 6.4 x 10 m Moon's mass = 7.3 X 1022 kg 4.6 x 106 m O 3.8 x 108 m O 3.9 x 1011 m
Answers
Answer:
3.8 × 108 m
Explanation:
Use formula: v^2 = G x m central / r
G = 6.77 e-11
Also, it was right on Edge.
Good luck!
The distance between Earth and its moon is 3.8×10⁸ m.
What is centripetal force?
A force that causes a body to follow a curved path is known as a centripetal force. It always moves in a direction that is the opposite of the body's velocity and in the direction of the immediate center of curvature of the path.
It is "a force by which bodies are dragged or driven, or in any manner tend, towards a point as to a center," according to Isaac Newton.
Given parameters:
Mass of the Earth: M = 6.0 × 10²⁴ kg.
Mass of the moon: m = 7.3 × 10²² kg.
Moon's tangential speed: v = 1,025 m/s
Let the distance between the center of Earth and the moon is r.
Hence,
GMm/r² = mv²/r
r = GM/v²
= 6.7 × 10 ⁻¹¹ × 6.0 × 10²⁴ / (1,025)²
= 3.82×10⁸ m.
Hence, by subtracting Earth's radius = 6.4 x 10⁶ m, we get, the distance between Earth and its moon is 3.8×10⁸ m.
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Which of the following is a basic solution?
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Answer:
what exactly are the following?
Empujamos un baúl 3 metros, para ello aplicamos una fuerza de 200 Newton. ¿Cuál es el trabajo realizado?
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Answer:
Trabajo realizado = 600 Nm
Explanation:
Dados los siguientes datos;
Fuerza = 200 Newton
Distancia = 3 metros
Para encontrar el trabajo realizado; Trabajo realizado = fuerza * distancia
Sustituyendo en la ecuación, tenemos; Trabajo realizado = 200 * 3
Trabajo realizado = 600 Nm
Which of the following instruments measures time most accurately?
a. Sundial
b. quartz watch
c. pendulum clock
d. watch with balance wheel
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Answer:
b) Quartz Clock
Explanation:
It's is a very type of clock which uses the vibration of quartz crystals to measure time accurately
why Newton law of gravitational force is called universal law
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Answer:
Newton's law of gravitational holes good irrespective of the nature of two bodies., i.e., big or small, at all times, at all locations and for all distances in the universe.
Explanation:
It is called so because it is applicable on all bodies having mass, and the bodies will be governed by the same law, that is newton's law of gravitation. Thus, as it is applicable universally, it is called as universal law.
Hence why the name implies it lol
A car manufacturer wants to change its car’s design to increase the car’s acceleration. Which changes should the engineers consider making to the design? increase the force that the engine provides decrease the force that the engine provides increase the mass of the car decrease the mass of the car increase the top velocity the car can travel decrease the top velocity the car can travel
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Answer:
I. increase the force that the engine provides.
II. decrease the mass of the car
Explanation:
Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.
Mathematically, it is given by the formula;
Force = mass * acceleration
[tex] Acceleration = \frac {Force}{mass} [/tex]
In this scenario, a car manufacturer wants to change its car’s design to increase the car’s acceleration. Thus, the changes the engineers should consider making to the design is to increase the force that the engine provides and decrease the mass of the car.
Answers:
increase the force that the engine providesdecrease the mass of the carincrease the top velocity the car can travel14. Saeed is pulling a 6 kg heavy rock with an upward force of 40 N but does not succeed to lift it up. What is the magnitude of the normal force on the rock?
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Answer:
58.8 N
Explanation:
The normal force is calculated as equal to the perpendicular component of the gravitational force.
Thus; N = mg
We are given m = 6 kg
Thus;
N = 6 × 9.8
N = 58.8 N
Thus, magnitude of normal force on the rock = 58.8 N
Name two devices we use generators in. Describe how they work.
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Answer:
There are two fundamental types of generators known as AC (alternating current) and DC (direct current) generators. While the technique of producing electricity is the same in both types, AC and DC power become different in terms of their applications – the way in which loads receive electric power.
Explanation:
An electric generator is a device that converts mechanical energy obtained from an external source into electrical energy as the output. ... Instead, it uses the mechanical energy supplied to it to force the movement of electric charges present in the wire of its windings through an external electric circuit.
what is the physical properties of radon
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Answer:
1) Radon is colorless at standard temperature and pressure and it is the most dense gas known. At temperature below it's freezing point is has a brilliant yellow phosphorescence. It is chemically unreactive, it is highly radioactive and has a short half life.2) 7.5 times heavier than air and more than 100 times heavier than hydrogen. The gas liquefies at −61.8 °C (−79.2 °F) and freezes at −71 °C (−96 °F). On further cooling, solid radon glows with a soft yellow light that becomes orange-red at the temperature of liquid air (−195 °C [−319 °F]).Explanation:
I think this much is enough , as more information is given in other answer if more is needed just comment me I will answer you there only.What is the main force that must be overcome in order to push an object
along a horizontal surface?
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Answer: Friction
Explanation:
Friction and the normal force would be the two initial forces to overcome.
Answer: Friction
Explanation: The object must be pushed along which will create friction which nmust be overcome.
Objects that are able to roll have what type of energy?
A. potential
B. mechanical
C. thermal
D. chemical
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is there a gravitational force of attraction between your phone and the earth?
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The graph shows the amplitude of a passing wave over time in seconds (s) What is the approximate frequency of the wave shown? A. 6 Hz B. 0.2 0.4 Hz
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Answer:
0.2 I took the test
Explanation:
I took the test
The time period of the whole wave cycle is 6 seconds but the time period of one complete wave is about 4 seconds here. The inverse of this time period is the frequency, that is 0.2 Hz.
What is frequency ?Frequency by definition is the number of events per unit time. Frequency of a wave is the number of wave cycles in one second. It is the inverse of the time period.
Frequency is directly related to the energy of the wave. As the frequency increases, energy of the wave also increases. In the given graph the wave cycle is given for a time of 6 seconds.
The time period for one complete wave is 4 second from the graph.
thus, T = 4 s
v = 1/T
= 1/4 = 0.2 s⁻¹ or 0.2 Hz
Therefore, the frequency of the wave shown, is 0.2 Hz.
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PLS HELPPP!! ITS DUE TODAY!
I will make brainliest!
Answer the following question:
Which process is an example of a physical change?
a. carrots are cut into small pieces and mixed into a salad
b. a peanut butter sandwich is eaten and broken down by enzymes in the stomach
c. sodium metal and chlorine gas are combined to form a sodium chloride, or table salt
d. sodium metal and water are combined to form a basic compound and a flammable gas
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What name is given to the turning effect of a force?
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Answer:
The turning effect of a force is known as the moment. It is the product of the force multiplied by the perpendicular distance from the line of action of the force to the pivot or point where the object will turn. When undoing a nut fastened to a screw by hand one realises that the amount of force required is a lot greater than when undoing the same nut using a spanner.
Explanation:
Explain why a charged body loses its charge if we touch it with our hand?
if u answer me I can give u brainliest ☺️
Answers
Answer:
Explanation: A charged body loses its charge when we touch it with our hand because some of the charge flows through our body to the ground earthing. As a result the charge on the body decreases every time we touch it. This is because of earthing.
Explanation:
yw .
Explanation:
When we touch a charged body, it loses its charge, due to the process of earthing. Our body is a good conductor of electricity. It transfers the charges to the earth
Why would you consider Joule’s early experiments with electric motors important even though he did not
achieve his goal?
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Answer:
It counts as a learning experience
Explanation:
He can learn from his mistakes and take important steps to achieve his goal In the future.
Setting objectives can lead to better direction, enhanced attention, higher levels of motivation, and increased productivity. You may change your behaviours, mindset, confidence, and daily activities by setting clear, measurable goals.
What important even though achieve his goal?More essential than monetary or material rewards is achievement. Greater personal satisfaction comes from completing the task or reaching the goal than from being praised or recognized.
Additionally, crucial is commitment. It is less probable that you will succeed if you don't give your aim your all. This enables you to change your future expectations and strategy.Feedback enables you to discover your strengths and weaknesses.
Therefore, people who are driven by achievement are always looking for methods to do things better.
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A wave frequency of 440 Hz travels through a medium at 343 m/s. Calculate the wavelength
for this wave.
150,920 m
1.28 m
97 m
0.078 m
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Answer:
0.78 m
Explanation:
us the formula
speed = frequency x wavelength
343 = 440 x wavelength
343 / 440 = wavelength
wavelength = 0.78 m
I think the last option, you wrote wrongly, it is supposed to be 0.78 not 0.078 .
if you think I am wrong please do tell me, I will redo this.
hope this helps
the driver of the bus brought the students to the playground and returned to the garage on the same road when the bus engine was doing more work: A when the students were driving: B when they returned to the garage, explain why
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Answer: A driver must not drive a vehicle at such a slow speed ... When driving under adverse weather, road or traffic ... before the school bus stops to pick up or let off students
Explanation:
hope this helps :)