Q. Two 2.0 g spheres are charged equally and placed 1.6 cm apart. When released, each begins to accelerate at 205 m/s2. What is the magnitude of the charge on each sphere?
Q. A certain type of laser emits light that has a frequency of 5.2 x 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 2.7 x 10-11 s. How many wavelengths are there in one pulse?