What is the net force acting on a 0.15-kg hockey puck accelerating at a rate of 12 m/s2

Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?

To find the enthalpy of a reaction in the lab, you measured the of the reactants and the change during the reaction.