An elephant exerts a clockwise torque on a merry-go-round of 5.3 Nm while a rhino exerts a counterclockwise torque of 2.8 Nm on the same merry-go-round. What is the net torque on the merry-go-round

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

Which type of energy would have nothing to do with ironing clothes? a. heat b. chemical c. electrical d. mechanical

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?