How to find Va, Vb, Vc, Vd and R1,R2,R4,R6 current?

Determine the maximum r-value of the polar equation r =3+3 cos 0

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.

The energy produced as a result of this flow of electrons from atom to atom is called