Why isn't earth overcrowded with animals

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

In a system, when potential energy decreases, then entropy also decreases. true false

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity