Two 11.5-mg balls are connected by a 28.9-cm-long insulating rod of negligible mass. one ball has a charge of +q and the other has a charge of −q. the system is placed in a 592 n/c uniform electric field. initially the system is at rest and makes an angle α= 58.9° with respect to the field. it is then released, and when it is momentarily aligned with the electric field, its kinetic energy is 4.86 mj. what is the magnitude of q?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

Which atomic model was proposed as a result of j. j. thomson’s work?