A sound source is traveling towards an observer. What is the effect on the wave wavelength? Increases

Remains constant

Decreases

Solar cell a produces 100 joules of energy, when a light source is shown on it for 3 minutes. solar cell b produces 200 joules of energy when the same light source is shown on it for 5 minutes. which solar cell works better? a) solar cell b, because it produces more energy. b) solar cell b, because it generates more power. c) solar cell a, because it produces energy quicker. d) solar cell a, because it generates a greater wattage. eliminate

What was the first instrument to ever record an earthquake?

The junction rule describes the conservation of which quantity? note that this rule applies only to circuits that are in a steady state.