Question

A steel cylinder at sea level contains air at a high pressure. Attached to the tank are two gauges, one that reads absolute pressure and one that reads gauge pressure. The tank is then brought to the top of a mountain.

Which statement is true for the gauge that reads gauge pressure?

a. Both gauges will change by the same amount.
b. The pressure reading increases.
c. The pressure reading stays the same.
d. The pressure reading decreases.

Answer 1

C) The pressure reading stays the same.

Step-by-step explanation:

Answer 2

B. The pressure reading increases.

Step-by-step explanation:

Gas pressure is an absolute pressure and atmospheric pressure decreases as height with respect to sea level is increased. Gauge pressure is the difference between absolute pressure and atmospheric pressure. Therefore, absolute pressure remains the same and gauge pressure reading increases.

The correct answer is option B.