Two photons of electromagnetic radiation, A and B, are propagating in a vacuum. If photon A is less energetic than photon B, then A)
A has lower frequency and longer wavelength than B.

B)
A has higher frequency and longer wavelength than B.

C)
A has higher frequency and shorter wavelength than B.

D)
A has lower frequency and shorter wavelength than B.

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?