Alight source of wavelength λ illuminates a metal and ejects photoelectrons with a maximum kinetic energy of 2.00 ev. a second light source with half the wavelength of the first ejects photoelectrons with a maximum kinetic energy of 6.00 ev. what is the work function of the metal?

How many neutrons does element x have if it’s stormy umber is 33 and it’s mass number is 95?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

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.