Light exhibits the doppler effect. what does this tell us? light has properties in common with other types of waves. light and sound are the same types of waves. light changes speed as we approach the source. light is visible only under certain conditions.

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

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

The mantle is made up of which structural zones?