The top layer of your goose down sleeping bag has a thickness of 5.5 cm and a surface area of 1.0 m2 . when the outside temperature is -18 ∘c you lose 24 cal/hr by heat conduction through the bag (which remains at a cozy 35 ∘c inside). assume that you're sleeping on an insulated pad that eliminates heat conduction to the ground beneath you. (note: 1 cal = 4184 j)

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

Aperson standing in a canoe exerts a force of 700 n to throw an anchor over the side. find the acceleration of the canoe if the total mass of the canoe and the person is 100 kg?

Yvette hangs a 2.4kg bird feeder in the middle of a rope tied between two trees. the feeder creates a tension of 480 n in each side of the the rope.