You are given two carts, A and B. They look identical, and you've been told they are made of the same material. You place A at rest on an air track and give B a constant velocity to the right so that it collides elastically with A. After the collision, cart B moves to the left, the speed of B being smaller than what it was before the collision. What do you conclude? a. Cart A is hollow. b. The two carts are identical. c. Cart B is hollow.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

1. how to locate the image in converging(concave) mirror and diverging (convex) mirror with salt. 2. how to locate the image in a converging (convex) lens and diverging (concave) lens with salt.

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.