A positive point charge is fixed at Q1 = 2.5 * 10–5 C the origin of coordinates, and a negative point charge Q2 = –5.0 * 10–6 C is fixed to the x axis at x = ±2.4 m Find the location of the place(s) along the x axis where the electric field due to these two charges is zero.

Adiver in midair has an angular velocity of 6.0 rad/s and a moment of inertia of 1.2 kg·m2. he then pulls is arms and legs into a tuck position and his angular velocity increases to 12 rad/s. the net external torque acting on the diver is zero. what is his moment of inertia in the tuck position?

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

In science and physics what is the standard unit of measure for speed?