Momentum of a system isn't always constant. What condition assures that momentum is conserved for a system?
What will be an ideal response?
Momentum is conserved for an "isolated" system; i.e., if the net external force acting on the system is zero.
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Elastic Collisions: In a game of pool, the white cue ball hits the #5 ball and stops, while the #5 ball moves away with the same velocity as the cue ball had originally. Both balls have the same mass. This type of collision is
A. somewhat inelastic. B. elastic. C. completely inelastic.
Heat is:
A. energy transferred by virtue of a temperature difference B. energy transferred by macroscopic work C. energy content of an object D. a temperature difference E. a property objects have by virtue of their temperatures
An atomic mass unit (amu) is 1/12 the mass of
A) an electron. B) a proton. C) a hydrogen atom. D) a carbon atom. E) a uranium atom.
What any type of field generation cannot create is
A) light. B) electromagnetic waves. C) energy.