Which of the following concerning a barometer or manometer is/are true? Pressure

Question

Which of the following concerning a barometer or manometer is/are true?

Pressure is directly proportional to the height of the liquid used in the device.

Pressure is directly proportional to the density of the liquid used in the device.

Pressure is independent of the acceleration of gravity.

A.1 only

B.2 only

C.3 only

D.1 and 2

E.1, 2, and 3

Which statement is inconsistent with the kinetic theory of an ideal gas?

A.Most of the volume occupied by a gas is empty space.

B.Gas molecules move in a straight line between collisions.

C.The forces of repulsion between gas molecules are very weak or negligible.

D.The average kinetic energy of a gas is proportional to the absolute temperature.

E.The collisions between gas molecules are inelastic.

If a sample of nitrogen gas in a sealed container of fixed volume is heated from 25°C to 175°C, the value of which of the following quantities will remain constant?

A.the average intensity of a molecular collision with the walls of the container

B.the pressure of the gas

C.the average speed of the molecules

D.the density of the nitrogen

E.the average kinetic energy of the molecules

Explanation / Answer

1. the answer is 1st : True sentence : the presure is directly proportional to the height of the column.

Q 2 : the answer is : E

Becuase the collision is always elastic so that energy is transferred from one atom/ molecule to another atom/molecule.

Q 3 )

There is not change in volume so the density will be remained constant.

and the answer is :

D

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