An l-r-c series circuit has c = 4.80 mf, l = 0.520 h, and source voltage amplitude v = 56.0 v. the source is operated at the resonance frequency of the circuit. if the voltage across the capacitor has amplitude 80.0 v, what is the value of r for the resistor in the circuit?

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

What kind of simple machine is a catapult?

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?