Answers
Answer:
Correct: B
Explanation:
The first block wont move because:
Σf=3-3=0N.
The second block will move because:
Σf:5-3=2N (direction to the right).
The third block will move because:
Σf=3N (direction to the right).
Related Questions
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Grade 8 Science Winter Interim
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ABC
Question 3
Twoiron balls are dropped from a height of 100 meters One Dal Frame A) is not moving when it is dropped and the second ball is moving horizontally at a constant velocity of 10 m/s when it is dropped (Frame B). The balls follow the
trajectories indicated by the arrows and fall for 4,52 s before hitting the ground. (Ignore air resistance)
Frame A
Frame B
1kg
-10%
10kg
Answers
help fast plssssssssssssssssssss
Answers
That should be the answer
How many lone pairs does this molecule have?
Answers
Answer:
Just 1 i.e., Option B.
Because except for top of the molecule, all other sides are filled with a letter meaning there is one free space.
Answer:
B
Explanation:
H . + H . -----> H:H {":" represents a covalent bond, that is, a shared pair of electrons}
A Lewis structure is a convention used to represent the covalent bonding in a molecule. Dots or lines are used to represent
valence electrons (electrons available for bonding). The Lewis structure for the hydrogen molecule is as follows.
H:H or H-H
A bonding pair is an electron pair shared between two atoms.
A nonbonding pair (lone pair, unshared pair) is a pair of electrons that remains on one atom and is not shared.
is photosynthesis part of chemical change?If yes can I have photosynthesis in chemical equation as chemical symbols
Answers
Answer:
yes it is a chemical change
i have made it in above picture
How do you find the scientific notation of a Avogadro's number??
Answers
Answer: ummmmmm hmmmmm
Explanation:
A 30.0 mL aliquot of 0.0250 M HCl solution is titrated using 0.0500 M NaOH.
A) determine the volume of NaOH necessary and the pH at the equivalence point.
B) Determine the pH of the solution after 160.00 mL base is added.
Answers
Answer:
xdyd jdkdudktvko?ñhixiskrsjdjuxguxhicjovyx bhfoggu vohudixiyd siydyoxoyxyoxyixhoxiyxys ztiziyxyoxoyzyizitztixtx no se
hkgkfu
Explanation:
iyxyx yo gkxtuztizyidtiztizigxigxkhxhk. jvkgxitxoyfihciyxyixihxoyxyodyidtistusdtidti lo siento
When thermal energy is removed from matter, what happens to the molecules?
Answers
Answer:
Figure it out.
Explanation:
.When sodium atoms (Na) and chlorine atoms (Cl) join to make sodium chloride, or table salt, they form an ionic bond. Using this information, which pair of elements is most likely to form an ionic bond?
potassium (K) and fluorine (F)
aluminum (Al) and aluminum (Al)
sulfur (S) and oxygen (O)
calcium (Ca) and neon (Ne)
Answers
Answer:
potassium (K) and fluorine (F)
Explanation:
Potassium is an alkali metal just like sodium and fluorine is a halogen just like chlorine. A metal and nonmetal will often join to form an ionic compound.
Aluminum, if it was going to bond to itself, would be a metallic bond.
Sulfur and oxygen are both nonmetals and would form a covalent bond.
Calcium would not bond with neon as neon is a noble gas.
Answer:
A) potassium (K) and fluorine (F)
Explanation:
got it right on time for learning :)
hlo ;) lol im banned and my name is kimboslicer it is so sad my accout is bloked 4 23:12
Answers
Answer:
lol im sorry man
Explanation:
Answer:
My old acc got banned
Explanation:
Mix 200 g of copper at 100 °C with 1,000 g of water at 20 °C. Final temp. = 21.42°C a) How much heat energy (q) did the water gain? b) Now solve for the specific heat (c) of copper:
Answers
Answer:
a) [tex]Q_w=5941.3J[/tex]
b) [tex]C_{Cu}=0.378\frac{J}{g\°C}[/tex]
Explanation:
Hello there!
In this case, when a hot substance is mixed with a cold one, we can evidence how the hot one is able to heat up the cold one as it cools down. Thus, the net heat flow for this problem can be set up as shown below:
[tex]Q_{Cu}+Q_{w}=0[/tex]
Whereas the heats can be written in terms of mass, specific heat and temperatures:
[tex]m_{Cu}C_{Cu}(T_F-T_{Cu})+m_{w}C_{w}(T_F-T_{w})=0[/tex]
Thus, we proceed as follows:
a. Here we compute Qw:
[tex]Q_w=1,000g*4.184\frac{J}{g\°C}(21.42\°C-20\°C) \\\\Q_w=5941.3J[/tex]
b. Now, since this heat is equal to the negative of the heat contribution of copper (as it cools down), we can compute the specific heat of copper as shown down below:
[tex]C_{Cu}=\frac{-5941.3J}{200g(21.42\°C-100\°C)} \\\\C_{Cu}=0.378\frac{J}{g\°C}[/tex]
Best regards!
if carbon dioxide is broken down. what element will it give?
Answers
3.
Plant A
Plant B
Is tall
Is short
Has many large deep roots Has many small short roots
Has many small leaves
Has many large leaves
Comes in many different colors comes in only one color
The table shows some observations made by a group of students studying plants they will use
in a flower garden. Which conclusion is best supported by these observations?
Answers
Which of the greenhouse gases are carbon compounds?
Answers
Answer:
Methane (CH4),Carbondioxide green house gases are carbon compounds
Carbon dioxide (CO2) and methane (CH4) are two powerful greenhouse gases produced by the carbon cycle.
Which reactions are oxidation-reduction reactions? Check all that apply.
(1) 2 upper N a plus upper C l subscript 2 right arrow 2 upper N a upper C l.
(2) Upper P b (upper O upper H) subscript 2 right arrow upper P b upper O plus upper H subscript 2 upper O.
(3)Upper C u plus 2 upper A g upper N upper O subscript 3 right arrow upper C u (upper N upper O subscript 3)subscript 2 plus 2 upper A g.
(4)Upper Z n upper B r subscript 2 plus 2 upper A g upper N upper O subscript 3 right arrow 2 upper A g upper B r plus upper Z n (upper N upper O subscript 3) subscript 2.
(5)Upper C upper H subscript 4 plus 2 upper O subscript 2 right arrow upper C upper O subscript 2 plus upper H subscript 2 upper O.
answer- 1,3, & 5
explanation- I did it on edge 2021
Answers
Answer:
the 1st 3rd and 5th ones
EDGE 2021
Explanation:
Answer:
A
C
E
Explanation:
Covalent bonds form due to the attraction between _____.
a positive atomic nucleus and a negative one
the nuclei of two atoms
the electrons of two atoms
the electrons of one atom and the nucleus of another
Answers
Answer:
the electron of one atom and the nucleus of another
as insoluble ...... can be separated from a liquid by filtration on centrifugation
Answers
Answer:
by centrifugation
Explanation:
in such cases filtration cannot be used for separation
In terms of valence electrons, explain why metals form positive ions.
Answers
Answer:
Explanation:
Metal elements form positively charged ions called cations because they are located on the left side of the periodic table These elements all have valence electrons in an s orbital. These electrons are relatively easy for the atom to lose to achieve a stable octet of electrons in its outermost energy shell.
can someone explain in detail how molar mass, Avogadro's number, and volume are all connected through moles? Im so confused :(
Answers
Answer:
See Explanation
Explanation:
By definition, 1 mole is the mass of substance (or, formula mass in grams) containing 1 Avogadro's Number (N₀ = 6.02 x 10²³) of particles. That is ...
1 mole of hydrogen atoms (H) = 1.00794 grams
1 mole of molecular hydrogen (H₂) = 2.01588 grams
1 mole of any substance = 1 formula weight in grams
1 mole = 1 Avogadro's Number (N₀) = 1 formula weight in grams
In the concept of 'gas laws' 1 mole of any (all) gas at STP conditions ( => 0°C & 1 atmosphere pressure) occupies 22.4 Liters & is known as the 'molar volume' of a gas at STP. If the temperature &/or pressure change the volume will not be 22.4 Liters.
For reactions whose coefficients are balanced to the lowest whole number values (i.e., no fractional coefficients) the equation is known as the 'standard reaction' and conditions are assumed to be STP and the coefficients of gas phase components indicate molar volumes. Example ...
Given N₂(g) + 3H₂(g) => 2NH₃(g) is assumed to be at 0°C; 1 Atm pressure.
Molecular Nitrogen = 1 molar volume = 22.4 Liters of N₂(g)
Molecular Hydrogen = 3 molar volumes = 3 x 22.4 Liters of H₂(g) = 67.2 Liters of H₂(g)
Molecular Ammonia = 2 molar volumes = 2 x 22.4 Liters of NH₃(g) = 44.8 Liters of NH₃
2. How many carbon atoms would be in 2 MOLES of carbon?
Answers
Answer:
In one mole of carbon , there are 6.02 × 1023 atoms. so in two moles , there will be twice that = 1.204× 1024.
which one of the following forces is a contact force force of gravity or force of friction
Answers
Answer:
a force of friction would be like something moving that suddenly stops because of the texture of another object while a force of gravity would be something falling and gravity pulling it down :) hope this helps
Explanation:
I need help I don’t get this
Answers
Answer:
Visit: gotit-pro.com
Explanation:
119 kPa x 1 atm/101 kPa = 1.18 atm
2) Convert temperature to Kelvin
35 + 273 = 308 K
3) Use PV=nRT and solve for V
(1.18 atm)(V)=(0.0972 mol)(0.0821)(308 K)
V = (0.0972 mol)(0.0821)(308 K) / (1.18 atm)
V = 2.08 L
An ideal gas occupies a volume V at an absolute temperature T. If the volume is halved and the pressure kept constant, what will happen to it's temperature?
a. It will halve to T/2.
b. It will increase to 3T.
c. It will increase to 2T.
d. It will remain the same.
Answers
Answer:
It will be halve of T
Explanation:
V1 = V
T1 = T
V2 = ½V
T2 = x
V1/T1 = V2/T2
V/T = ½V/x
Vx = ½VT
2Vx = VT
2x = T
x = ½T
Give two examples of elevation.
Answers
Answer:
An example of elevation is a plane flying at 36,000 feet above the ground. An example of elevation is a pope being raised to the position of saint. An example of elevation is a ballet dancer leaping three feet in the air. ... At 8,850 m (29,028 ft), the summit of Mount Everest is the highest elevation on Earth.
Explanation:
please mark me brainly!
in____particles are in contact with each other.
Answers
Answer:liquid
Explanation:
The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.
Read the description of the centrioles. What is their function?
Answers
Answer:
Typically found in eukaryotic cells, centrioles are cylindrical (tube-like) structures/organelles composed of microtubules. In the cell, centrioles aid in cell division by facilitating the separation of chromosomes. For this reason, they are located near the nucleus.
What is the mass of chlorine in 3.9 x 1019 molecules of Cl2?
Answers
Explanation:
A photon is a quantum of EM radiation. Its energy is given by E = hf and is related to the frequency f and wavelength λ of the radiation by
E=hf=hcλ(energy of a photon)E=hf=hcλ(energy of a photon),
where E is the energy of a single photon and c is the speed of light. When working with small systems, energy in eV is often useful. Note that Planck’s constant in these units is h = 4.14 × 10−15 eV · s.
Since many wavelengths are stated in nanometers (nm), it is also useful to know that hc = 1240 eV · nm.
These will make many calculations a little easier.
All EM radiation is composed of photons. Figure 1 shows various divisions of the EM spectrum plotted against wavelength, frequency, and photon energy. Previously in this book, photon characteristics were alluded to in the discussion of some of the characteristics of UV, x rays, and γ rays, the first of which start with frequencies just above violet in the visible spectrum. It was noted that these types of EM radiation have characteristics much different than visible light. We can now see that such properties arise because photon energy is larger at high frequencies.
Silver nitrate reacts with calcium chloride as
shown.
2 AgNO3 + CaCl2 → 2 AgCl + Ca(NO3)2
How many grams of CaCl2 would be required to completely react with 420 mL of
0.506 M AgNO3 solution?
Answer in units of grams.
Answers
Answer:
11.8g of CaCl₂ would be required
Explanation:
To solve this question we need to find the moles of AgNO₃ in the solution. Thus, and using the chemical reaction we can find the moles of CaCl₂ required for a complete reaction and its mass as follows:
Moles AgNO₃:
420mL = 0.420L * (0.506mol / L) = 0.213 moles AgNO₃
Moles CaCl₂:
Based on the chemical reaction, 2 moles of AgNO₃ react per mole of CaCl₂.
The moles of CaCl₂ that will react are:
0.213 moles AgNO₃ * (1mol CaCl₂ / 2 mol AgNO₃) = 0.106 moles CaCl₂
Mass CaCl₂ -Molar mass: 110.98g/mol-
0.106 moles CaCl₂ * (110.98g / mol) =
11.8g of CaCl₂ would be requiredWhich equation has x = 5 as the solution?
2x = 5
2x = 5
x - 10 = 15
x - 10 = 15
x + 15 =10
x + 15 =10
2x = 10
Answers
Answer:
x-10 should be the answer
Witch event signals the birth of a star
Answers
Answer:
It's either C or D
Explanation:
I'm learning this too! :)
A carrier *
Organism that transmits disease through blood
O Person or animal that is infected with the disease but is asymptomatic
O Used to treat a bacterial infection, cannot be used to prevent an infection
Used to prevent a viral infection, must be given before the person is infected
Answers
Answer: carrier, is a person or other organism that has inherited a recessive allele for a genetic trait or mutation but usually does not display that trait or show symptoms of the disease. Carriers are, however, able to pass the allele onto their offspring, who may then express the genetic trait.
i think it is Person or animal that is infected with the disease but is asymptomatic
Explanation: