The maximum electron energy in a photoelectric experiment is 2.8 eV. When the frequency of the illuminating radiation is decreased by 50%, the maximum electron energy drops to 1.1 eV. Find a) the original wavelength (and frequency) of the illuminating radiation and b) the work function of the emitting surface

Stars x and y are both bluish main sequence stars. star x has a higher absolute brightness than star y. how do the two stars compare? explain

Greg drew a diagram to compare two of the fundamental forces. which labels belong in the areas marked x, y and z? gravitational force electromagnetic force x. attractive y repulsive z: infinite range x: infinite range y attractive z. repulsive x. always attractive y: infinite range z: attractive or repulsive x. attractive or repulsive y infinite range z: always attractive

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius