A silver bar with a mass of 250.0 g is heated from 22.0 º C to 68.5 º C. How much heat does the silver bar absorb?

Apackage of supplies is dropped from a plane, and one second later a second package is dropped. neglecting air resistance, the relative velocity of the 1st package viewed from the second will 56) a) increase. b) be constant. c) be zero. d) depend upon their weight. e) decrease

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?