In a wave with a frequency 500 Hz the distance between a crest and its adjacent trough
was 0.05 m. What is the velocity of the wave?

A150 w lamp emits light of wavelength 590 nm uniformly in all directions. what is the photon flux (photons per unit area per unit time) on a small screen at a distance 2.3 m from the lamp? assume the photons are uniformly distributed over the surface of a sphere of radius 2.3 m.

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost