Space and time
A) have always existed. B) were created at some time before the big bang.
C) were created by the big bang. D) were created at some time after the big bang.
C
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How does the summer load curve for a utility differ from one that might have characterized the 1930s? Ignore the overall difference in scale in your answer
What will be an ideal response?
Einstein theories tell us that the speed of light
A) depends on one's frame of reference. B) is constant in all frames of reference. C) provides accurate clocks. D) slows in a transparent medium.
A radar installation operates at 9000 MHz with an antenna (dish) that is 15 meters across. Determine the maximum distance (in kilometers) for which this system can distinguish two aircraft 100 meters apart
a. 7.4 km b. 370 km c. 3700 m d. 37 km e. 740 km
Suppose you launch two probes in opposite directions from the Space Station and they meet as they orbit Earth. According to general relativity, why does this happen?
A) They are following the straightest possible paths through spacetime, and those paths curve so that the probes meet. B) They are following the allowed orbits according to Newton's universal law of gravitation. C) The force of gravity tugs on the probes and forces them to orbit the Earth. D) Objects launched in space always follow circular paths, no matter where they are.