700%
4. the speed of sound in alr is about 340 meters per second. how long does it take a sound wave to travel a distance of 7800 meters?
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Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.