Even though your car weighs several thousand pounds, it can easily be raised above your head by a pneumatic lift at the service station by a small motor pumping fluid through a pipe. This an illustration of
A. Bernoulli's Law.
B. Pascal's Principle.
C. Archimedes' Principle.
D. Newton's 3rd Law.
Answer: B
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A brass cube, 10 cm on a side, is raised in temperature by 150°C. The coefficient of volume expansion of brass is 57 × 10^-6/°C. By what percentage does volume increase?
a. 12% c. 1.1% b. 2.8% d. 0.86%
A student weighing 300 N climbed a flight of stairs 5.0 m high in 6 s. How much work was done by the student?
a. 1500 J b. 1800 J c. 1500 W d. 1800 W e. 50 W
The small piston of a hydraulic lift has a diameter of 8.0 cm, and its large piston has a diameter of 40 cm. The lift raises a load of 15,000 N. Assume the pistons each have negligible weight
(a) Determine the force that must be applied to the small piston. (b) Determine the pressure applied to the fluid in the lift.
How much power is theoretically available from a mass flow of 1000 kg/s of water when it falls a vertical distance of 100 meters?
a. 980 kW b. 98 kW c. 4900 W d. 980 W e. 9600 W