Release a Ball Inside a Freely Falling Elevator and It

question 35

Multiple Choice

Release a ball inside a freely falling elevator and it falls directly in front of you instead of "falling to the floor," because you, ball, elevator, and enclosed air are in free fall. If you do the same with a helium-filled balloon, the balloon will

• A)also remain in front of you.
• B)press against the ceiling.
• C)press against the floor.
• D)slowly rise.
• E)slowly fall.

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Definitions:

Btu

British thermal unit, a unit of measure for energy; specifically, the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit.

Cold Material

A term that generally refers to material at a temperature significantly lower than the ambient or desired processing temperature.

Heat Exchanger

A device used to transfer heat between two or more fluids, gases, or solids of different temperatures without mixing them.

Condenser

An electrical charge storage device also known as a capacitor. In an A/C circuit, it is a heat exchanger located in the vehicle airflow and subject to the ram air. Cooling of the refrigerant causes it to condense to a liquid state. This results in the refrigerant changing to a liquid state.