When an object floats in a liquid, the buoyant force is ____________ the weight of the object.
a. equal to
b. larger than
c. smaller than
d. not related to
[Ques. 2] The upward force exerted by a fluid on an object immersed in it is called
a. gravitational force.
b. atmospheric force.
c. buoyant force.
d. weight.
e. none of the above.
[Ques. 3] A plasma state of matter is
a. a conducting solid.
b. a part of the blood.
c. an ionized gas.
d. a conducting liquid.
e. none of the above.
[Ques. 4] If the same-sized force is made to act over a smaller area, the pressure is
a. decreased.
b. increased.
c. unchanged.
d. dependent upon the shape of the area.
[Ques. 5] Which of the following is not a unit of pressure?
a. atmosphere
b. psi
c. N/m2
d. mm of mercury
e. pascal
f. none of the above
Indicate whether the statement is true or false
[Ques. 6] The difference between the pressures inside and outside a tire is called
a. absolute pressure.
b. gauge pressure.
c. atmospheric pressure.
d. psi.
e. none of the above.
[Ques. 7] A device that measures absolute air pressure is called a
a. manometer.
b. barometer.
c. thermometer.
d. tire gauge.
e. none of the above
[Ques. 8] The pressure exerted by a gas is the result of
a. the Bernoulli effect.
b. molecular collisions.
c. Pascal's principle.
d. the ideal gas law.
e. none of the above.
[Ques. 9] Most modern aircraft use hydraulics systems to move the control surfaces on the aircraft. This is an example of using Bernoulli's principle.
a. True
b. False
Indicate whether the statement is true or false
[Ques. 10] Carburetors in NASCAR race cars make use of Bernoulli's principle.
a. True
b. False
Indicate whether the statement is true or false
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