An electromagnetic wave traveling in a
vacuum has a wavelength of
6.6 X 10-11 m. Calculate the
frequency of this wave.
The speed of light in a vacuum is c.
a) 4.6Hz
b) 2. 2Hz
c) 4.6 x 1018 Hz
d) 2. 2 x 10-19Hz

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

What is the rate of change in a objects position?

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)