Suppose Earth collapsed down to one-tenth of its present radius, while retaining all of its present mass. Compared to your present weight, your weight would then be
A) unchanged.
B) increased by a factor of 100.
C) increased by a factor of 10.
D) reduced by a factor of 10.
E) reduced by a factor of 100.
B
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Nuclear Binding Energy: A beryllium-8 nucleus at rest undergoes double alpha decay as follows:
The known atomic masses are:
What is the kinetic energy of each departing alpha particle? (1 u = 931.5 MeV/c2)
A. 46 keV B. 65 keV C. 92 keV D. 130 keV E. 180 keV
A spring has 0.770 kg oscillating on it with a period of 1.25 seconds
(a) What is the frequency? (b) Determine the spring constant. (c) If the mass is doubled and the spring made 3 times stiffer, what is the new period?
Cool stars emit a great deal of ultraviolet radiation that you can't see, and hot stars emit plenty of infrared radiation
Indicate whether the statement is true or false
The light curve of a large Cepheid variable would typically show pulsations in luminosity ________.
A. every 6 minutes B. every 6 years C. every 6 months D. every 6 hours E. every 60 days