In order for heat to transfer from one object to another, which must be true?
F The objects must be different sizes.
G The objects must be different
temperatures.
(H The objects must be the same size.
1 The objects must be the same
temperature.

An experiment is designed to test the relationship between the initial height of a basketball before it is dropped to the height of its rebound bounce. the height of the rebound bounce is measured using a scale positioned behind the ball. in the above experiment, which condition would not be controlled? a). the starting height of the ballb). the surface the ball bounces on c). the type of ball d). the method to measure the rebound height of the ball

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.