Abullet fired straight through a board  0.10  m  thick strikes the board with a speed of  480  m/s  and emerges with a speed of  310  m  .
part a
what is the  x  component of the average acceleration of the bullet while in the board? the positive  x  direction is the initial direction of motion of the bullet.
express your answer with the appropriate units.

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