An uncharged capacitor and a resistor are connected in series to a source of emf. If e m f = 10.0 V, C = 18.0 µF, and R = 100 Ω, find the following: a. The time constant of the circuit.
b. The maximum charge on the capacitor.
c. The charge on the capacitor at a time equal to one time constant after the battery is connected.

What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34

Aboat radioed a distress call to a coast guard station. at the time of the call, a vector a from the station to the boat had a magnitude of 45.0 km and was directed 15.0° east of north. a vector from the station to the point where the boat was later found is = 30.0 km, 15.0° north of east. what are the components of the vector from the point where the distress call was made to point where the boat was found? in other words, what are the components of vector c = b - a?

Why does lightning travel from clouds to the ground?