Question

Check all statements below that are true.

Heating air under the balloon will cause the
air inside to expand.
The air inside will have the same mass but
more volume.
Heating the air under the balloon will cause
the entire balloon to rise.
The outside temperature will have no affect
on the height of the balloon.
The only way to make the balloon sink is to
let out the air

Answer 1

The answers are A,B,C.

Explanation: Just got it right on Edge 2020

Answer 2

The heating of the balloon has been best explained by statement A, B, and C.

Heating has been defined as the rise in the vibration of the molecules with the gain of energy.

Heating of balloon

• The balloon has been heated, and there is an increase in the temperature of the molecules with the rise in the motion. The motion results in the expansion of the air inside the balloon. Thus, statement A is correct.

• The air will not result in the gain or loss of the mass, however there has been increase in the volume due to expansion. Thus, statement B is correct.

• The gain of the energy and increased volume results in the decrease in the density of the balloon, and the balloon starts to move upwards. Thus, statement C is correct.

• The outside temperature has been able to pressure the rising balloon and affects its height. Thus, statement D is incorrect.

• The balloon can be sunk by increased outside pressure and letting out air. Thus, statement E is incorrect.

Therefore, the heating of the balloon has been best explained by statement A, B, and C.

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