To resolve an object in an electron microscope, the wavelength of the electrons must be close to the diameter of the object. what kinetic energy, , must the electrons have in order to resolve a protein molecule that is 2.80 nm in diameter? take the mass of an electron to be 9.11×10−31 kg .

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.

Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius 푅=0.381meters and mass 푀=3.1푘푔. initially 푚"is on the ground and 푚#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of 푚#just before it strikes the ground. assume the pulley bearing is frictionless.