What is the frequency of radiation emitted by a photon of light if the energy released during its transition to ground state is 3.611 × 10-15 joules? (planck's constant is 6.626 × 10-34 joule seconds) 5.50 × 10-11 hz 2.39 × 10-50 hz 5.45 × 1018 hz 1.633 × 1027 hz

Ingrid wrote the hypothesis below. if the temperature of a liquid increases, the density of the liquid decreases because the particles move farther apart. what are the variables in her hypothesis?

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?