Which are true for a photon. (Choose 3)
o Energy can be calculated.
o Is the same thing as an electron.
o Is the smallest packet of light.
o Energy cannot be calculated.
o The higher the frequency, the higher the energy. o The higher the frequency, the lower the energy.

Why there is no inductive reactance in dc circuits

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

The two required components for a generator are