As measured from the Earth, a spacecraft is moving at speed 0.80c toward another spacecraft moving at speed 0.60c in the same direction, i.e., the first spacecraft is catching up with the second spacecraft. What is the speed of the first spacecraft as viewed from the second spacecraft?
a. 0.38c b. –0.20c
c. –0.38c d. not given
a
Physics & Space Science
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An average lapse rate of 2.7 °F/1000 ft is equivalent to
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What is the major rock-forming mineral group? Give examples of minerals in this group
What will be an ideal response?
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