Chapter 13 Forces in Fluids

Water pressure is greatest against the

• top of a submerged object

• bottom of a submerged object

• sides of a submerged object

• none of these

A dam is thicker at the bottom than at the top partly because

• water is denser at deeper levels

• water pressure is greater with increasing depth

• surface tension exists only on the surface of liquids

• it looks better

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The pressure in a liquid depends on liquid

• density

• depth

• volume

• width

The pressure at the bottom of a swimming pool filled with water does NOT depend on which of the following?

• the acceleration due to gravity

• water density

• the depth of the liquid

• the surface area of the water

One liter of water has a mass of

• 1 kg

• 500 g

• 1000 kg

• 10 kg

The mass of a cubic meter of water is

• 1 kg

• 500 g

• 1000 kg

• 10 kg

Pumice is a volcanic rock that floats. The density of pumice is

• less than the density of water

• equal to the density of water

• more than the density of water

• dependent on the color of the pumice

The reason that buoyant force acts upward on a submerged object is that

• it acts in a direction to oppose gravity

• if it acted downward nothing would float

• the weight of a fluid displaced reacts with an upward force

• upward pressure against the bottom is greater than downward pressure against the top of the submerged object

A completely submerged object always displaces its own

• volume of fluid

• weight of fluid

• density of fluid

• all of these

Compared to the density of water, the density of a fish is

• more

• less

• the same

• dependent on the color of the fish