What three things happen when air is warmed?

a) it expands
b) it contracts
c) it becomes lighter
d) it becomes heavier
e) it rises
f) it sinks

Aball bearing at 220.0 °c is dropped into a cup containing 250.0 g of water at 20.0 °c. the water and ball bearing come to a temperature of 30.0 °c. what is the heat capacity of the ball bearing in j/°c? (hint: how are the algebraic signs of q related for the ball bearing and the water? )

What is the difference between electrically neutral objects and electrically charged objects

Avalue that describes how heavy an object is and is related to the force of gravity is