(3 points) ultraviolet light with wavelength λ 300 nm falls on a cesium surface. the kinetic energy of emitted photoelectrons is 2.1 ev. what is the work function of cesium? what is the maximum wavelength of light for the photoelectric effect to occur for cesium?

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?