After 6.3 s, a spinning roulette wheel has sped up to a final angular velocity of 47.3 rad/s. During this time, the wheel has an angular acceleration of 1.1 rad/s2. What was the roulette's initial angular velocity?

A: all waves on the electromagnetic spectrum travel at the same speed in a vacuum. the speed of these waves in a vacuum is 3x108 m/s. as the wavelength of a wave doubles, how does the speed and frequency of the wave change?