5.Imagine you are ice skating with your BFF. Both of you at rest, when you shove him/her away from you. You have a mass of 65 kg and he/she has a mass of 55kg. When you shove off, you move away with a velocity of 2.0 m/s. With what velocity does your BFF move away from you

v2 = 2.36 m/s

Explanation:

Momentum is simply the the product of mass of an object and it velocity. Generally, when object moves they have momentum . The unit for momentum is kgm/s.

During collision momentum is conserved . This means that

initial momentum = final momentum

If their is an equal and opposite reaction your momentum should be equal to your BFF.

m1 v1 = m2 v2

m1 = 65 kg

v1 = 2.0 m/s

m2 = 55 kg

v2 = ?

m1 v1 = m2 v2

65 × 2 = 55v2

130  = 55 v2

divide both sides by 55

v2 = 130/55

v2 = 2.36363636364

v2 = 2.36 m/s

c.is a substance that requires a small amount of energy per gram to raise its temperature; has strong cohesive forces between molecules.

explanation:

a colorless, transparent, odorless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me