In a circuit, we are using conducting wires made from Manganese If we assume there are 3 free electrons per an atom of manganese, what is its electron density?

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

The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ft⋅lbflbm⋅r(1 psia144 lbf/ft2) = 0.3704 psia⋅ft3lbm⋅r the amount of air that must be added to raise the pressure is lbm

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?