What is the explanation for the fact that the desert sand is very hot in the day and very cool at night? 1. Sand reflects light very well. 2. Sand is a bad heat conductor.
3. Sand has a low specific heat compared to air

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