Atmospheric Pressure and Barometer Concepts

This video tutorial explains how to solve physics problems related to barometers. It covers the calculation of mercury column height at sea level, determining air pressure at different elevations, comparing mercury and water columns, and calculating the density of unknown fluids. The tutorial also discusses atmospheric pressure calculations involving two different fluids.

What is the primary function of a mercury barometer?

• To measure temperature

• To measure atmospheric pressure

• To measure humidity

• To measure wind speed

How is the height of the mercury column in a barometer at sea level calculated?

• By dividing atmospheric pressure by the density of mercury

• By multiplying atmospheric pressure by the density of mercury

• By subtracting atmospheric pressure from the density of mercury

• By adding atmospheric pressure to the density of mercury

What happens to the height of the water column when mercury is replaced with water in a barometer?

• It becomes taller

• It remains the same

• It becomes shorter

• It disappears

If a mercury column is 72 cm tall, what is the atmospheric pressure at that elevation in atm?

• 0.876 atm

• 1.013 atm

• 0.947 atm

• 1.000 atm

How do you calculate the density of an unknown fluid in a barometer?

• By dividing the height of the unknown fluid by the height of mercury

• By subtracting the height of mercury from the height of the unknown fluid

• By multiplying the height of mercury by the height of the unknown fluid

• By using the ratio of the heights of mercury and the unknown fluid

What is the density of a fluid if the mercury column is 69 cm and the fluid column is 176 cm?

• 532 kg/m³

• 13600 kg/m³

• 720 kg/m³

• 1000 kg/m³

In a barometer with water and oil, which liquid is at the bottom and why?

• Water, because it is lighter

• Oil, because it is lighter

• Water, because it is denser

• Oil, because it is denser

How is the atmospheric pressure calculated in a barometer with two different fluids?

• By subtracting the pressure of the lighter fluid from the heavier fluid

• By dividing the pressure of the heavier fluid by the lighter fluid

• By multiplying the pressures of both fluids

• By adding the pressures exerted by each fluid

What is the atmospheric pressure in kPa if the water column is 6 meters and the oil column is 5 meters?

• 100.0 kPa

• 101.3 kPa

• 95.96 kPa

• 94.08 kPa

Which equation is used to calculate atmospheric pressure with one fluid in a barometer?

• Density of fluid minus height of fluid

• Density of fluid plus height of fluid

• Density of fluid divided by height of fluid

• Density of fluid times height of fluid