You and your friend Joe are filming a music video. Joe has a spring with spring constant 9.8 N/m and a 0.2-kg mass hanging from the end,
resulting in harmonic motion. You want the metronome to match the
period of the bouncing spring. How long would your metronome's
pendulum have to be?
L =
meters

Ibelieve the answer is d. densityhope my answer has you : )

Current supplied to consumers from generating plants like coal power plant, nuclear power plant, geothermal and others are in form of alternating current instead of direct current because it can be transported easily in a long distance. also, the alternating current has a wide range of frequency and the amount or energy can be increased or decreased.