A 95 kg athlete makes a quarter circle turn in 2.1 seconds. If the radius of the circle R = 12 m, determine the speed, acceleration and the net force acting upon the athlete.​

Acar travels in reverse. it covers 150 meters in 12 seconds what is the velocity of the car what is the speed of the car

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?

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?