Which observation provided albert einstein the clue that he needed to explain the photoelectric effect? a) light is made up of extremely small particles. b) particles that are emitted from a strip of metal are electrons. c) shining light on a metal strip produces emissions. d) energy of electrons depends on light’s frequency, not intensity.

Achemistry student needs of 40ml diethylamine for an experiment. by consulting the crc handbook of chemistry and physics, the student discovers that the density of diethylamine is 0.7 . calculate the mass of diethylamine the student should weigh out. round your answer to significant digits.

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate

Which radioisotope is used in dating geological formations?