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Answer:
A. Velocity
Explanation:
Velocity is vector quantity thus has both magnitude and direction. It describes not only the speed but also the direction. Speed is scalar quantity so describes only speed but not direction. Energy has nothing to do with speed, acceleration describes change in velocity in a direction over time
A
Excitation to a higher energy state requires energy which is absorbed from the electromagnetic waves applied.
d = speed x time
distance = 29 x 30
distance = 870m
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