Barometer

Q. Which of the following instruments is used to measure atmospheric pressure?

1. Barometer
2. Odometer
3. Thermometer
4. Galvanometer

Q. In a functional siphon, water rushes from the reservoir to the siphon because ______ .

1. the pressure in siphon is higher than the atmospheric pressure
2. the pressure in siphon is zero
3. the pressure in siphon is lower than the atmospheric pressure
4. the pressure in siphon becomes equal to the atmospheric pressure

Q.

The normal atmospheric force ( pressure) acts on all bodies, we know.

But then, why does the reading of a digital weight measurer in a grocery store shows zero when nothing is placed on it? It should show the normal atmospheric pressure.

Q. Match the following liquids to their corresponding column heights ($h_1,h_2,h_3$)
in a barometer. ($h_1>h_2>h_3$)

1. $h_1$
2. $h_2$
3. $h_3$

Q. Match the following liquids to their corresponding column heights ($h_1,h_2,h_3$)
in a barometer. ($h_1>h_2>h_3$)

1. $h_1$
2. $h_2$
3. $h_3$

Q. In barometer, the weight of the column in the tube is equal to the force applied to it by the mercury bowl due to atmospheric pressure.

1. True
2. False

Q. An ideal gas is kept in a long cylindrical vessel fitted with a frictionless piston of cross-sectional
area 10 cm² and weight 1 kg. The length of the gas column in the vessel is 20 cm. The atmospheric pressure is 100 kPa. The vessel is now taken into a spaceship revolving round the earth as a satellite. The air pressure in the spaceship is maintained at 100 kPa. Find the length of the gas column in the cylinder.

Q. is most commonly used liquid in barometer.

1. Oil
2. Mercury
3. Water
4. Sea water

Q. In free space, Fortin's barometer will read:

1. $0mm$ of Hg
2. $76cm$ of Hg
3. $1cm$ of Hg
4. None of these

Q.

Match the following statement:

Column 1	Column 2
A device used for recording atmospheric pressure.	Torricellian vacuum
An empty space inside the barometric tube above mercury.	normal pressure
76 cm of the vertical height of mercury at sea level.	mercury
Weather forecast when atmospheric pressure suddenly drops and air is moist.	107.4 m
Weather forecast when atmospheric pressure does not change.	triangulation method
The height of a place when the mercury level falls by 1 cm.	barometer
A method used for measuring very large distances.	rain storm
A liquid commonly used in cistern barometer.	fair weather

Q. What is pynometric density