Given a combined circuit, find the equivalent resistance and current values for three resistors. I'd like it if an explanation was attached to the answer.

What is the frequency of a light wave with a wavelength of 620nm

Which statement is true? a. kepler's laws apply only to the motion of earth. b. kepler's laws can be used to predict eclipses. c. kepler's laws are true for a central force that is directly proportional to distance. d. kepler's laws can be deduced from newton's laws of motion and gravity.

State the below theories and give the name of the writer of the theory 1. wave theory 2. quantum theory 3. corpuscular theory 4. electromagnetic theory