The density of sodium is 968 g/cm3. suppose you need 250 gm of sodium for an experiment. which volume of sodium do you need?
a. 2,420 cm3
b. 0.26 cm3
c. 3.87 cm3

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical