As a spaceship is moving toward Earth, an Earthling measures its length to be 325 m, while the captain on board radios that her spaceship's length is 1150 m
(c = 3.00 × 108 m/s)
(a) How fast is the rocket moving relative to Earth?
(b) What is the TOTAL energy of a 75.0-kg crewman as measured by (i) the captain in the rocket and (ii) the Earthling?
(a) 0.959c = 2.88 × 108 m/s
(b) (i) 6.75 × 1018 J (ii) 2.39 × 1019 J
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Stars with masses between 0.4 and 4
a. undergo thermonuclear fusion of hydrogen and helium, but never get hot enough to ignite carbon. b. undergo thermonuclear fusion of hydrogen, but never get hot enough to ignite helium. c. produce type-I supernovae after they exhaust their nuclear fuels. d. produce type-II supernovae after they exhaust their nuclear fuels. e. undergo carbon detonation.
Suppose that at a certain instant of time, the wave function shown below describes a certain quanton’s state. If we were to perform an experiment to locate the quanton, what would be the least likely result or results within the graph’s range? 
A. 
B. 
C. 
D. 
Tuning forks #1, #2, and #3 each have slightly different frequencies.When #1 and #2 are sounded together, a beat frequency of 3 Hz results. When #2 and #3 are sounded together, a beat frequency of 5 Hz results. If the frequency of #1 is 100 Hz, which of the following cannot be the frequency of #3?
A. 92 Hz B. 95 Hz C. 98 Hz D. 102 Hz E. 108 Hz
In a muggy region, the extra warmth you often feel is mainly due to
A) evaporation. B) condensation. C) sublimation. D) none of the above