Forces and Matter

A column of liquid has height h, mass m and density ρ. The gravitational field strength is g.

Which expression gives the pressure due to the column of liquid?

• hρ

• mρ

• mgh

• ρgh

• A

• B

• C

• D

• A

• B

• C

• D

• 12 cm

• 74 cm

• 86 cm

• 100 cm

• A

• B

• C

• D

• force decreased ; pressure decreased

• force decreased ; pressure unchanged

• force unchanged ; pressure decreased

• force unchanged ; pressure unchanged

• 30 N

• 35 N

• 40 N

• 45 N

• decreasing the surface area of the stone

• increasing the mass of the stone

• lowering the stone deeper into the liquid

• using a liquid with a lower density

• pressure at P decreases ; level L falls

• pressure at P decreases ; level L rises

• pressure at P stays the same ; level L falls

• pressure at P stays the same ; level L rises

• The density of the gas is less than the density of air.

• The density of the gas is greater than the density of air.

• The pressure of the gas is less than atmospheric pressure.

• The pressure of the gas is greater than atmospheric pressure.