What is Newtons third law

Answers

Answer 1
Answer:  Newton's third law is for every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. 
Answer 2
Answer:  For every action, there is an equal and opposite reaction. 

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Why is it important for DNA to be copied before cell division?

Answers

If DNA is improperly copied, the cell will function differently.
This is called a mutation.
Mutated cells do not do the originally intended purpose.

If we say that one quantity is directly proportional to another quantity, does this mean that they are equal to each other?

Answers

If we say that one quantity is directlyproportional to another quantity, we do not mean they are equal to each other.

DIRECT PROPORTION:

  • The term "direct proportion" refers to the relationship between two variables in which a change in one causes a similar change in the other.

  • This means that when two quantities are directly proportional to one another, one quantity increases as the other increases and vice versa.

  • For example, if quantity A is directlyproportional to quantity B;
  1. when quantity A increases, quantity B also increases
  2. when quantity A decreases, quantity B also decreases.

  • Therefore, If we say that one quantity is directly proportional to another quantity, we do not mean they are equal to each other.

Learn more at: brainly.com/question/14664532?referrer=searchResults

NO !

It means that (one of them) divided by (the other one) is always the same number.

(Other people probably won't explain it to you this way, but I'm special, and this is true.

Anyway, the direct answer to your question is: No.)

What is the velocity of a car that travels 100 meters north in for seconds

Answers

The velocity is 25 because you just divide 100/4
The equation for velocity is distance/time.. So if it goes 100m in 4 seconds.. It's 100/4 which equals 25 mls north. (Velocity includes the direction in the answer)

Calculate the distance in kilometers that Charlie runs if he maintains an average speed of 8 km

Answers

8 km is not a speed. And even if it were, we would still need to know how much time Charlie spent running.

Without water's hydrogen bonds, whichof the following would occur?
Select all that apply.
A
Water would be a gas at room temperature,
B
Water would boil at 100 degrees Celsius.
C
Water would form droplets.
D
ice would sink.​

Answers

Answer:

A. Water would be a gas at room temperature, and

D. Ice would sink in water.

Explanation:

There are three types of intermolecular forces: London dispersion forces, dipole-dipole interactions, and hydrogen bonds. The relative strength of these forces depend on the size of the molecule. However, for small molecules like water (three atoms per molecule,) hydrogen bonds would be much stronger than the other two types of forces.

Without hydrogen bonds, water molecules would be held together only with dipole-dipole interactions and London dispersion forces. To get an idea of what that would be like, consider hydrochloric acid \rm HCl.

\rm HCl and water \rm H_2O contain about the same number of electrons. The H-Cl bond in \rm HCl is polar, which allows for dipole-dipole interactions. However, only H-O, H-F, and H-N bonds allow for hydrogen bonding. As a result, there won't be any hydrogen bonding between \rm HCl molecules. Without hydrogen bonding, \rm HCl boils at well below \rm 0\; ^\circ C under standard pressure. It is a gas at room temperature under standard pressure. That's about the same as what water molecules would behave (physically) without any hydrogen bonds between them.

Also because of hydrogen bonding, the density of ice (solid \rm H_2O) is typically greater than that of water (liquid \rm H_2O.) When compared to water in its liquid state, there are more hydrogen bondings between molecules of water in its solid state. The hydrogen bonds hold the molecules together to form a lattice. Because of this structure due to hydrogen bondings, the molecules are farther apart than they are in the liquid states. As a result, the density of ice is typically smaller than that of water. That would likely not be the case if there was no hydrogen bondings between water molecules.

what is the force on a hockey puck when shot with a stick? the pucks mass is 0.155 kg and it leaves the stick at 40 m/s. the contact time between the puck and the stick is 1.1 millisecond

Answers

According to the  Newton's second law of motion:

Force = mass × acceleration

Acceleration = change in speed ÷ time

Therefore,

Force =mass × (change in speed/time)

Acceleration = 40 m/s ÷ 1.1 millisecond

Acceleration = 40 m/s ÷ 0.001 seconds

Acceleration = 40,000 m/s²

Hence,

F = m × a

F = 0.155 kg × 40,000 m/s²

F = 4,600 kg·m/s² (Newtons)