Use the appropriate relativity formula given in the text to answer the following: Isabella is moving by you at a speed of 0.8c. While 1 minute passes on your watch, how much time will you see pass on her watch?
A) 36 seconds
B) 1 minute
C) 48 seconds
D) 100 seconds
A
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Do you think it is possible that a 10-solar-mass main-sequence star could harbor an advanced civilization? Explain your reasoning
What will be an ideal response?
Mort, who is standing on the ground, throws a ball at 20 m/s westward as measured by him. What is the ball's velocity relative to Velma, who is in a train moving eastward past Mort at 70 m/s?
A) 90 m/s westward B) 50 m/s westward C) 70 m/s westward D) 50 m/s eastward E) 90 m/s eastward
Although fossils can be made in numerous ways, only a tiny fraction of living organisms leave behind any kind of fossil remnant because
A) most minerals that replace organic material are soluble in water and so dissolve away B) the vast majority of dead organisms decay long before any mineral replacement can occur C) the organic material is destroyed by radioactivity D) they are destroyed by geological processes before mineral replacement can occur
Evidence of liquid water in Mars' distant past suggests that it had a substantial atmosphere compared to what it has presently. What happened to its water vapor?
A) The carbon dioxide in its atmosphere dissolved in the water and combined with surface rocks. B) Its atmosphere was mostly hydrogen and helium. Mars' gravity is too weak to hold them. C) The water vapor has frozen out into the polar ice caps and permafrost as Mars has cooled. D) Mars initially had such a large greenhouse effect that the atmosphere became quite hot and slowly escaped. E) It has now all been lost in space, including the carbon dioxide and water vapor.