Classify the following nuclei into stable or unstable. Justify your answer for each one.

Aquantity of gas has a volume of 1.5 m3 and an absolute pressure of 95 kpa. when the gas is compressed to a volume of 0.5 m3, what is the new absolute pressure of the gas? (assume that there’s no change in temperature.)

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Name two kinds of practical electric pumps.