Ch.13 Physical Science- Forces in Fluids

Front

A resting object exerts pressure equal to:

Back

its weight divided by its contact area

Front

Compared to the pressure exerted by a brick standing on its end, the pressure exerted by a brick resting on its side is

Back

less

Front

What determines the amount of water pressure you experience while swimming?

Back

How deep you are in the water.

Front

Which of the following is NOT true about SI unit of pressure?

Back

It is used for fluids only

Front

Blaise Pascal discovered that changes in pressure...

Back

are transmitted equally throughout a fluid

Front

In a hydraulic lift system, why is the output force greater than the input force?

Back

The fluid pressure acts on areas of different sizes.

Front

Which of the following is NOT true about Bernoulli's principle?

• the pressure within a moving fluid is greater than the pressure within a nonmoving fluid
• as a fluid's speed increases, the pressure within it decreases
• when a moving fluid slows, the pressure within it increases
• it helps explain the lift of an airplane

Back

the pressure within a moving fluid is greater than the pressure within a nonmoving fluid

Front

The buoyant force acting on a submerged object is equal to:

Back

The weight of the fluid displaced by the object

Front

When does a partially submerged object float?

Back

The object's weight is equal to the buoyant force.

Front

How does a submarine change its depth?

Back

By altering its density.