Which statement provides the best definition of a closed system o A system in which no net external forces act upon the system
O A system in which no external forces act on the system
o A system in which all acting forces are external to the system
O A system in which the objects exert no force upon each other

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

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2

What energy transformations occur each time the skateboarder rolls up the ramp?