# Lesson Worksheet: Atmospheric Pressure Physics

In this worksheet, we will practice describing atmospheric pressure using various units, including the height of a mercury column.

Q1:

The apparatus shown in the diagram is used to measure atmospheric pressure. Which of the following occupies region A of the test tube?

• AWater vapor
• BVacuum
• CGlass
• DAir

Q2:

A bar is a unit that is defined as being equal to Pa. Convert a pressure of 0.48 bar to a pressure in pascals.

• A Pa
• B Pa
• C Pa
• D Pa
• E Pa

Q3:

A torr is a unit that is defined as being equal to the pressure produced by 1 mmHg.

Convert a pressure of 455 torr to a pressure in pascals.

• A Pa
• B Pa
• C Pa
• D Pa
• E Pa

Convert a pressure of 455 torr to a pressure in bar.

Q4:

An atmosphere is a unit that is defined as being equal to Pa.

Convert a pressure of 0.444 atm to a pressure in pascals. Give your answer in scientific notation to two decimal places.

• A Pa
• B Pa
• C Pa
• D Pa
• E Pa

Convert a pressure of 0.444 atm to a pressure in bar. Give your answer to three decimal places.

Q5:

The apparatus shown in the diagram is used to measure atmospheric pressure. The depth of the mercury used is varied, but the base of the apparatus is kept at the same altitude. There is a slight difference in the height of the column of mercury for the two depths of mercury used.

Which produces a greater pressure, a depth of 1 cm of air or a depth of 1 cm of mercury?

• AEqual pressures are produced.
• BA depth of 1 cm of air
• CA depth of 1 cm of mercury

Which of the following correctly relates the magnitude of the upward pressure on the mercury column due to the mercury in case I to that in case II?

• AThe pressure is greater in case II.
• BThe pressure is the same for both cases.
• CThe pressure is greater in case I.

Which of the following correctly relates the magnitude of the upward pressure due to the atmosphere on the mercury column in case I to that in case II?

• AThe pressure is greater in case II.
• BThe pressure is greater in case I.
• CThe pressure is the same for both cases.

Which of the following correctly relates the magnitude of the upward pressure on the mercury column in case I compared to that in case II?

• ACase I < case II
• BCase I > case II
• CCase I = case II

Q6:

The apparatus shown in the diagram is used to measure atmospheric pressure. Which of the following correctly relates the magnitude of pressure A and that of pressure B?

• APressure A > pressure B
• BPressure A = pressure B
• CPressure A < pressure B

Q7:

The apparatus shown in the diagram is used to measure atmospheric pressure. In which case is the apparatus at the greatest height above sea level?

• AI
• BII
• CThere is no difference in the apparatus’s height above sea level in the three cases.
• DIII

Q8:

The apparatus shown in the diagram is used to measure atmospheric pressure. Find the upward pressure on the mercury column. Use a value of 13,595 kg/m3 for the density of mercury.

Q9:

The apparatus shown in the diagram is used to measure atmospheric pressure. The apparatus is taken to a higher altitude above sea level and the height of the mercury column is reduced by the length . The apparatus is taken further above sea level and the column height is reduced by the length , where . The arrow labeled represents the increase in altitude of the apparatus that produces the initial reduction in the column height. Which of the three arrows shown most correctly represents the increase in the altitude of the apparatus that produces the second reduction in column height? The temperature of the apparatus and of the air are kept constant at all the altitudes at which the column height is measured.

• AI
• BII
• CIII

Q10:

A torr is a unit that is defined as being equal to the pressure produced by 1 mm of mercury. What is the pascal-to-torr ratio? Give your answer to the nearest integer.

This lesson includes 23 additional questions and 12 additional question variations for subscribers.