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.)

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate