F5 Chapter 2.2 atmospheric pressure and 2.3 Gas pressure

What is the air pressure of the barometer? Given the atmospheric pressure= 76cmHg and density of the mercury is 13600kgm-3 and gravitational acceleration= 9.81ms-2

• 1334.16Pa

• 101396.16Pa

• 110735.28Pa

• 9339.12Pa

Water has lower boiling point at the top of the mountain because

• temperature of the air at high altitude is lower.

• Density of the air at high altitude is lower.

• gravity at higher altitude is lower

• Number of the particle inside the water decrease at higher altitude.

3. Diagram below shows a syphon used to remove dirty water from an aquarium. Which one is correct when the water flow out through the tube?

• A. The pressure in the tube is higher than the pressure of atmospheric pressure.
• B. The position at the end of the tube outside of the aquarium must be higher than the position of the end of the tube inside the aquarium.
• C. Pressure inside the tube is lower than atmospheric pressure
• D. When the water level inside the aquarium decrease, the speed of the water flow out is increase.

4. Which of the following graphs shows the relationship between the pressure,P of the water and the depth of the water,h?

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What is the value of h if the gas pressure is 83cmHg. Given atmospheric pressure is 76cmHg.

• 5.0cm

• 7.0cm

• 10.0cm

• 12.0cm

The height of a mercury column in a barometer will decreased if

• the glass tube is lowered into the container

• the glass tube is lifted up

• the glass tube is tilted

• the atmospheric pressure decreases

A worker in a company uses an instrument called manometer. This instrument is use to measure

• gas pressure

• intensity of light

• atmospheric pressure

• density of liquid

Which of the following diagram is correct?

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Which of the following is used to measure atmospheric pressure?

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