Two charges are placed on the x axis. A charge of +q is placed at the point x=+L, and a charge of −q is placed at the point x=−L. If V=0 infinitely far away from the charges, what is the potential at the origin?

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

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).

Matter is needed to transfer thermal energy bya. conductionb. convectionc. radiation d. both a & b.