Athin 14.7 m long copper rod in a uniform magnetic field has a mass of 49.0 g. when the rod carries a current of 0.317 a, it floats in the magnetic field. what is the field strength of the magnetic field?

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

The period of a pendulum varies directly as the square root of the length of the pendulum and inversely as the square root of the acceleration due to gravity. find the period when the length is 144 cm and the acceleration due to gravity is 980 cm per second squared, if the period is 7pi seconds when the length is 289 cm and the acceleration due to gravity is 980 cm per second squared.

Match each scenario to the form of energy it represents