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Chapter 11 Forces in Fluids
Terms in this set (30)
Snowshoes enable a person to walk on deep snow because the snowshoes
increase the area over which the person's weight is distributed
A unit of pressure is called a
Air pressure exerted equally on an object from different directions is
Given that the air pressure outside your body is so great, why aren't you crushed?
Pressure inside your body balances the air pressure outside your body.
Air pressure decreases as
Water pressure increases as
Which type of substance does Pascal's principle deal with?
One application of Pascal's principle is
a hydraulic car lift
What scientific rule describes why water squirts from a plastic bottle when it is squeezed?
What does a hydraulic system do?
Which of the following is true of the buoyant force?
It acts in the upward direction.
What effect does a buoyant force have on a submerged object?
It causes a net force acting upward on the object
If an object floats, the volume of displaced water is equal to the volume of
the portion of the object that is submerged
What scientific rule states that the buoyant force on an object is equal to the weight of the fluid displaced by the object?
When water fills a submarine's flotation tanks, the overall density of the submarine
A ship stays afloat as long as the buoyant force is
equal to the ship's weight
Pascal's principle states that when force is applied to a confined fluid, the change in pressure is transmitted
equally to all parts of the fluid
Smoke rises up a chimney partly because of
Bernoulli's principle helps to explain
The mass per unit volume of a substance is its
An object that is more dense than the fluid in which it is immersed will
Which of these substances is the LEAST dense?
Pressure can be measured in units of
newtons per square meter
A substance whose shape can easily change is a
A material that can easily flow is called a
What scientific rule states that the pressure exerted by a moving stream of fluid is less than the pressure of the surrounding fluid?
The pressure in the deepest parts of the ocean is roughly how many times the usual air pressure you experience?
Which of these multiplies a force by transmitting it to a large surface area?
a hydraulic system
The braking system on a car is an example of
a hydraulic system
A barometer is used to measure pressure
in the atmosphere
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