Question | Answer |
When objects of different masses are hanging on a string, what combination creates the greatest gravitational potential energy? | high height and high mass |
What is the Law of Conservation of Energy? | Energy cannot be created or destroyed but it can transfer. |
What are renewable energy sources? | wind, solar, hydro, tidal |
What energy transformation takes place once the hood of the car becomes hot after driving for awhile? | kinetic to thermal energy |
What does NOT contribute to the formation of fossil fuels? | dead plants, heat and pressure, time |
When you open the door to a refrigerator for a minute, what happens? | Thermal energy in the air outside the refrigerator goes inside the refrigerator. |
What energy transformation takes place when a light is turned in? | electrical to thermal to light |
Why do we NOT use solar energy more often as an energy source? | not all areas get the same amount of light, equipment is expensive, storing energy is hard |
The efficiency of an average gasoline powered car is about 20%. What does this mean? | The car uses 20% of the energy stored for motion. |
What energy transformation takes place when a radio is plugged in and turned on? | electrical to sound waves |
What are nonrenewable energy sources? | nuclear, petroleum, coal, oil |
What is potential energy? | stored energy |
What is the source of all energy sources? | nuclear energy from the sun |
What energy transformation takes place when a volleyball player hits the ball? | chemical potential to thermal to kinetic |
What type of energy is a skier at the top of a mountain? | P.E. - gravitational potential energy |
What type of energy is gasoline in a stored tank? | P.E. - chemical |
What type of energy is a burning candle wick? | K.E. - thermal and light |
What type of energy is a spring in a pinball machine before it is released? | P.E. - elastic |
What type of energy is an ice cub sitting on the table melting at room temperature? | K.E. - thermal |