If a stone is dropped so that the initial gravitational potential energy of the system stone-Earth is 100 J but it reaches the ground with a kinetic energy of only 75 J, this is a violation of the principle of conservation of energy
A) True
B) False
B
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A circular cylinder of height 1.20 m having faces of diameter 0.620 m is immersed in water of density 1.00 × 103 kg/m3 with its axis vertical so that its faces are parallel to the surface of the water
The upper face is 2.50 m below the surface of the water. The net force on this cylinder is observed to be 1120 N downward. Atmospheric pressure is 1.01 × 105 Pa. What net force does the water exert on the lower face of the cylinder? A) 7.40 × 103 N B) 1.09 × 104 N C) 3.79 × 104 N D) 4.14 × 104 N E) 1.37 × 105 N
A lens of focal length 1500 mm is used to project an in image of the sun. If the sun subtends an angle of 
what is the diameter of the image?
A. 60 mm B. 30 mm C. 26 mm D. 6.5 mm E. 13 mm
What is the net power that a person loses through radiation if her surface area is 1.20 m2, if her emissivity is 0.895, if her skin temperature is 300 K, and if she is in a room that is at a temperature of 17°C?
The Stefan-Boltzmann constant is 5.670 × 10-8 W/m2 · K4. A) 60.3 W B) 62.6 W C) 65.7 W D) 68.4 W E) 64.8 W
What are the dimensions of volume?
What will be an ideal response?