Which statement is true about a farsighted (hyperopic) eye?
a. the image point is in front of the retina; a converging eyeglass lens is used to correct this condition.
b. the image point is in front of the retina; a diverging eyeglass lens is used to correct this condition.
c. the image point is behind the retina; a converging eyeglass lens is used to correct this condition.
d. the image point is behind the retina; a diverging eyeglass lens is used to correct this condition.

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Acharge of 8.4x10^-4 c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6.7x10^-3 t. if the magnetic force is 3.5 x10 ^-2 n, how fast is the charge moving?

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?