Choose the incorrect statement. a. The velocity of light in a vacuum is larger than the velocity of light in glass.
b. The velocity of light is constant irrespective of the medium through which it is traveling.
c. The velocity of light in a vacuum is the same as the velocity of x-ray in a vacuum.
d. The velocity of light in a vacuum does not depend on the wavelength of light.
e. The velocity of light is independent of the velocity of the observer and the source.

An athlete swings a ball, connected to the end of a chain, in a horizontal circle. the athlete is able to rotate the ball at the rate of 8.13 rev/s when the length of the chain is 0.600 m. when he increases the length to 0.900 m, he is able to rotate the ball only 6.04 rev/s. (a) which rate of rotation gives the greater speed for the ball? 6.04 rev/s 8.13 rev/s (b) what is the centripetal acceleration of the ball at 8.13 rev/s? m/s2 (c) what is the centripetal acceleration at 6.04 rev/s? m/s2