Forces And Fluids II Question Preview (ID: 2256)
Physics.
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Fluids flow ___________________
a) from regions of high pressure to low pressure.
b) only under extremely warm conditions.
c) from regions of low pressure to high pressure.
d) only when pressures are even.
An object that weighs 2 N displaces 250 mL of water, which weighs 2.5 N. What is the buoyant force on the object? Will it sink or float?
a) 2.5 N and it will float
b) 2 N and it will sink
c) 2 N and it will float
d) 2.5 N and it will sink
Steel is almost eight times more dense than water. A steel ship can float in water instead of sink because of its ______________
a) mass
b) density
c) shape
d) weight
If you blow a steady stream of air between two sheets of paper, the papers will ______.
a) blow apart because the fast-moving air has a lower pressure than the air outside the pieces of paper.
b) move toward each other because the fast-moving air has a higher pressure than the air outside the pieces of paper.
c) blow apart because the fast-moving air has a higher pressure than the air outside the pieces of paper.
d) move toward each other because the fast-moving air has a lower pressure than the air outside the pieces of paper.
The shape of a bird\'s wings can create ____________________
a) lift
b) weight
c) gravity
d) thrust
The reason you blow round bubbles and not square ones is explained by ____________.
a) Pascal\'s principle.
b) Boyle\'s principle.
c) Bernoulli\'s principle.
d) Archimedes\' principle.
You may feel discomfort in your ears when you take off in an airplane because the pressure in your inner ear __________.
a) is less than the atmospheric pressure at a high altitude.
b) is not affected and cannot be related to the atmospheric pressure at a high altitude.
c) is equal to the atmospheric pressure at a high altitude.
d) is greater than the atmospheric pressure at a high altitude.
You do not notice atmospheric pressure on your body because _____________
a) it is air.
b) the fluids inside your body also exert pressure.
c) of gravity.
d) atmospheric pressure acts evenly on your body.
Snowshoes enable a person to walk on deep snow because the snowshoes __________.
a) decrease the person’s weight on the snow.
b) increase the buoyancy of the person
c) increase the pressure on the snow.
d) increase the area over which the person’s weight is distributed
A bicycle tire remains inflated because air particles _________________________.
a) form a crystal matrix inside the tire.
b) displace the tire\'s density.
c) are less dense than the tire.
d) are constantly moving and pushing against the inside of the tire.
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