What is mass? (7th grade definition) thanks!!

In all trials, the magnitude of the final velocity for g1 + g2 was less than the magnitude of any initial velocity. as mass increased, what happened to the velocity? the velocity decreased. the velocity increased. the velocity of g1 + g2 could not be measured. the velocity was not affected by the mass increase.

In a system, when potential energy decreases, then entropy also decreases. true false

To a of 4 x hz is 1. 0. mm nm nm