Buoyancy makes objects
a. feel heavier.
b. feel lighter.
c. fly.

In a good thermo flask the main cause of heat loss is

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9