When a container of water is placed on a laboratory scale, the scale reads 120 g. now a 20-g piece of copper (of density 8.9 g/cm 3) is suspended from a thread and lowered into the water, not touching the bottom of the container. what will the scale now read?
a.122 g b. 140 g c.120 g d.112 g e.138 g

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 is required for an electric charge to flow through a wire? zero resistance in the wire a balance of electric potential high resistance in the wire a difference in electric potential

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?