Question

1.) How will the rising of a hot air balloon in cold air be different then if it rises in warm air?
a.)It will rise faster in cooler air

b.) It will rise more slowly in cooler air

c.) There will be no difference

d.) It will sink in cool air and rise in warm air

2.) The average kinetic energy of the molecules in a substance is correctly referred to as:
a.) heat
b.) density
c.) temperature
d.) solubility

3.) The average kinetic energy of the molecules in a substance refers to its:
a.) heat
b.) temperature
c.) momentum
d.) viscosity

Answer 1

Answer:

a.)It will rise faster in cooler air

a.) heat

Explanation:

i

A hot air balloon rises faster if cold air were to surround it due to density differences between the air in the two medium.

• Hot air is less dense as the average kinetic energy of the molecules is greater.
• Cold air is denser.
• This density contrast causes the balloon to move up at a high pressure.

ii. Heat

The average kinetic energy of the molecules in a substance is termed heat.

Heat is a form of thermal energy measured by the kinetic energy possessed by molecules in a substance.