How does car brakes change physical forces related to:

•Collision

•Velocity during impact

•Acceleration/Deceleration

• Force of impact

•Momentum

In which situation is no work being done? a person carrying a box from one place to another a person picking up a box from the ground a person pushing a box from one place to another a person pulling a box from one place to another

The first simple, one-celled organisms that developed during the Precambrian era are called A. Trilobites B. Prokaryotes C. Stromatolites

A 1500 kg wrecking ball hangs from a 16-m-long cable. The ball is pulled back until the cable makes an angle of 24.0 ∘ with the vertical. By how much has the gravitational potential energy of the ball changed?

What do hurricanes use to gain strength?

Which of the following is a lie? A) to find the total amount of energy, subtract the potential energy from 100. B) energy is measured in Joules. C) the heat radiating from a campfire represents potential energy.

Give the definition for diffusion. (A) gas molecules mix unequally average distance between collisions (B) gas molecules escape from a container into a vacuum through a small hole (C) gas molecules mix equally (D) gas molecules spread out in a

As resistance goes up, what happens to the current?

1. A 0.828-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. a) Find the momentum of the electron. b) Find the kinetic energy of the electron.

When are you most aware of your motion in a moving vehicle: when it is moving steadily in a straight line or when it is accelerating?

The force of gravity on a person or object on the surface of a planet is called?