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Forces And Fluids II
Test Description: Physics
Instructions: Answer all questions to get your test result.
1) Fluids flow ___________________
A
only when pressures are even.
B
from regions of low pressure to high pressure.
C
only under extremely warm conditions.
D
from regions of high pressure to low pressure.
2) 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 N and it will float
B
2.5 N and it will float
C
2.5 N and it will sink
D
2 N and it will sink
3) 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
shape
C
weight
D
density
4) If you blow a steady stream of air between two sheets of paper, the papers will ______.
A
move toward each other because the fast-moving air has a lower pressure than the air outside the pieces of paper.
B
blow apart because the fast-moving air has a higher pressure than the air outside the pieces of paper.
C
move toward each other because the fast-moving air has a higher pressure than the air outside the pieces of paper.
D
blow apart because the fast-moving air has a lower pressure than the air outside the pieces of paper.
5) The shape of a bird\'s wings can create ____________________
A
lift
B
thrust
C
weight
D
gravity
6) The reason you blow round bubbles and not square ones is explained by ____________.
A
Boyle\'s principle.
B
Archimedes\' principle.
C
Pascal\'s principle.
D
Bernoulli\'s principle.
7) You may feel discomfort in your ears when you take off in an airplane because the pressure in your inner ear __________.
A
is greater 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 less than the atmospheric pressure at a high altitude.
D
is equal to the atmospheric pressure at a high altitude.
8) You do not notice atmospheric pressure on your body because _____________
A
atmospheric pressure acts evenly on your body.
B
of gravity.
C
it is air.
D
the fluids inside your body also exert pressure.
9) Snowshoes enable a person to walk on deep snow because the snowshoes __________.
A
increase the buoyancy of the person
B
decrease the person’s weight on the snow.
C
increase the pressure on the snow.
D
increase the area over which the person’s weight is distributed
10) A bicycle tire remains inflated because air particles _________________________.
A
displace the tire\'s density.
B
are less dense than the tire.
C
are constantly moving and pushing against the inside of the tire.
D
form a crystal matrix inside the tire.
*select an answer for all questions
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