A238 92u nucleus is moving in the x-direction at 5.0 × 105 m/s when it decays into an alpha particle 4 2he and a 234 90th. if the alpha particle moves off at 21.2° above the x axis with a speed of 1.4 × 107 m/s, what is the recoil velocity of the thorium nucleus? assume the uranium-thorium-alpha system is isolated; you may also assume the particles are pointlike.

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