when galaxies move away from us they appear to have a "red shift" in color. explain why this happens.

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

Gordon is going for a run through the park, but it is cold outside. the low outside temperature could affect his personal safety.

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o