Energy and Momentum: An object initially at rest suddenly explodes in two fragments of masses 2.6 kg and 3.3 kg that move in opposite directions. If the speed of the first fragment is 3.6 m/s, find the internal energy of the explosion.
A. 30 J
B. 30 kJ
C. 38 J
D. 38 kJ
Answer: A
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While running, a person dissipates about 0.6 J of mechanical energy per step per kilogram of body mass. If a 60-kg person runs with a power of 70 watts during a race, how fast is the person running? Assume a running step is 1.5 m long.
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If m = 4, how may possible values can the spin quantum number ms have?
A) 3 B) 5 C) 4 D) 2 E) 1 F) 0
When a beam of light, which is traveling in glass, strikes an air boundary, there is
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