Physics Quiz 2

Which of the following statements accurately describes a manometer?

• a) It measures atmospheric pressure

• b) It measures gauge pressure

• c) It measures absolute pressure

• d) It measures pressure difference between two points

What is the relationship between the pressure at a point inside a liquid and the depth of the liquid directly above that point?

• a) Pressure is directly proportional to the depth

• b) Pressure is inversely proportional to the depth

• c) Pressure is proportional to the square of the depth

• d) Pressure is unrelated to the depth

A barometer is used to measure:

• a) Atmospheric pressure

• b) Liquid pressure

• c) Pressure in a confined container

• d) Pressure at a specific point in a fluid

In a U-shaped tube manometer, if the density of the liquid in one arm is greater than the density of the liquid in the other arm, which arm will the liquid rise higher in?

• a) The arm with the denser liquid

• b) The arm with the less dense liquid

• c) The liquid will not rise in either arm

• d) It depends on the volume of the liquid

In a barometer, what balances the atmospheric pressure acting on the mercury in the column?

• a) The weight of the mercury column

• b) The height of the mercury column

• c) The density of the mercury

• d) The surface tension of the mercury

What happens to the pressure at a point inside a liquid when the density of the liquid is increased?

• a) The pressure increases

• b) The pressure decreases

• c) The pressure remains the same

• d) It depends on the volume of the liquid

How does the pressure at a point inside a liquid change if the area of the surface of the liquid above that point is increased?

• a) The pressure increases

• b) The pressure decreases

• c) The pressure remains the same

• d) It depends on the depth of the liquid

How does the pressure at the bottom of a column of liquid change if the density of the liquid is doubled?

• a) The pressure doubles

• b) The pressure quadruples

• c) The pressure halves

• d) The pressure remains the same

A U-shaped tube manometer is used to measure the pressure difference between two points in a gas-filled container. If the difference in liquid heights is 30 cm and the density of the liquid is 800 kg/m^3, what is the pressure difference in Pascals?

• a) 240 Pa

• b) 2400 Pa

• c) 24,000 Pa

• d) 240,000 Pa

If the height of mercury in a barometer is 76 cm, what is the atmospheric pressure in mmHg? (Density of mercury = 13,600 kg/m^3)

• a) 76 mmHg

• b) 760 mmHg

• c) 7600 mmHg

• d) 760,000 mmHg