The galaxy NGC 4414 is moving away from us at 7.16x105 m/s. By how much will the
frequency of the 6.91x1014 Hz hydrogen line
be shifted in the galaxy's spectrum?
(Answer is x1012 Hz. Just fill in the
number in the blank, not the power.)

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.