What force is necessarily applied to the 2.5 cm-diameter piston of a hydraulic lift system in order to lift a truck of mass 1210 kg upon a platform supported by a 15 cm-diameter piston?
A. 33.6 N
B. 1980 N
C. 330 N
D. 494 N
E. 4850 N
F. 202 N
C. 330 N
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The following images show the four terrestrial planets in our solar system. Rank the planets from left to right based on the amount by which the greenhouse effect increases their surface temperatures, compared to what their temperatures would be without the greenhouse effect, from largest to smallest increase.
Grandfather clocks are designed so they can be adjusted by moving the weight at the bottom of the pendulum up or down. Suppose you have a grandfather clock at home that runs fast
Which of the following adjustments of the weight would make it more accurate? (There could be more than one correct choice.) A) Decrease the amplitude of swing by a small amount. B) Add more mass to the weight. C) Lower the weight. D) Raise the weight. E) Remove some mass from the weight.
Water falls a distance of 50.0 meters. The specific heat of water is 1.00 cal/gm 
C. What is the increase in temperature of the water after the fall, in 
C?
A. 0.12 B. 1.03 C. 2.65 D. 5.33 E. 7.50
Conservation of Momentum: In a police ballistics test, a 10.0-g bullet moving at 300 m/s is fired into a 1.00-kg block at rest. The bullet goes through the block almost instantaneously and emerges with 50.0% of its original speed. What is the speed of the block just after the bullet emerges?
A. 1.50 m/s B. 2.97 m/s C. 3.00 m/s D. 273 m/s