(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?

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

What is the gravitational attraction between a dating couple whose centers of mass are 0.630 m apart if the boy weighs 715 n and the girl weighs 465 n?