What must be tue about two objects if hest is fowing between them?
The objects must be dierent temperatures
The objects must be the same temperature
The objects must both be over room temperature
The objects must both be under room temperature

Iwill give brainliest if you answer right : )

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?