The cosmological redshifts of galaxies are Doppler shifts
a. True
b. False
Indicate whether the statement is true or false
False
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Uniform Circular Motion: A future use of space stations may be to provide hospitals for severely burned persons. It is very painful for a badly burned person on Earth to lie in bed. In a space station, the effect of gravity can be reduced or even eliminated. How long should each rotation take for a doughnut-shaped hospital of 200-m radius so that persons on the outer perimeter would experience 1/10 the normal gravity of Earth?
A. 91 min B. 8.7 min C. 4.6 min D. 1.5 min E. 0.011 min
What is created by the fusion of three helium nuclei?
B) oxygen C) carbon D) nitrogen E) iron
A block of ice sliding down an incline has one-quarter its maximum potential energy
A) one-quarter from the top. B) one-quarter from the bottom. C) three-quarters the way down. D) need more information
To achieve a high equivalent resistance for a pair of resistors, connect them in
A) series. B) parallel. C) either of these