Two crates, one heavy and one light, are at rest on a waxed floor. which crate will need the greater force to give the same change in speed? explain.

Which substances have the lowest melting points: ionic covalent, or metallic

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h