According to Einstein's special theory of relativity, when compared to an identical clock at rest, a clock moving with constant velocity will run
(a) Slow
(b) Fast
(c) At the same rate
(d) Alternately fast and slow
Ans: (a) Slow
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How does a red giant compare to a main-sequence star of the same mass?
A) The red giant has higher surface temperature and higher luminosity. B) The red giant has higher luminosity but lower surface temperature. C) The red giant has lower surface temperature and lower luminosity. D) The red giant lower luminosity but higher surface temperature. E) Both stars have the same mass and therefore have the same surface temperature and luminosity.
An astronaut is in equilibrium when he is positioned 140 km from the center of asteroid X and 581 km from the center of asteroid Y, along the straight line joining the centers of the asteroids. What is the ratio of the masses X/Y of the asteroids?
A) 0.0581 B) 17.2 C) 0.241 D) 4.15
What is the formula of a compound formed from the ions M3+ and X1-?
a. M3X b. MX c. M2X3 d. MX3
Estimated uncertainty is meant to take into account precision but not accuracy
Indicate whether the statement is true or false