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chapter 5 - energy
| Question | Answer |
|---|---|
| What does the Law of Conservation of Energy state? | Energy cannot be created or destroyed - the amount of energy in the universe remains constant. |
| What law states that one form of energy can change into another form? | The Law of Conservation of Energy |
| What is energy in the form of motion called? | kinetic energy |
| What is energy that is stored and at times, depends on its position? | potential energy |
| Friction causes mechanical energy (kinetic + potential) to change to what type of energy? | thermal energy |
| How do you determine how much energy is in certain foods? | check the calories |
| Does an increase in velocity increase kinetic energy? | Yes |
| What is mass transformed into in a nuclear fusion reaction? | energy |
| Green plants store what type of energy? | chemical energy |
| Give an example of where nuclear fusion/fission occur. | The sun and stars |
| If 3 objects with different masses have the same velocities, Which object would have the most kinetic energy? | The object with the most mass. |
| What is the formula for finding the kinetic energy (KE) of an object? | KE = 1/2mv2(.5)(mass in kg)(velocity squared) |
| What is the formula for finding the gravitational potential energy (GPE)of an object? | GPE = mgh (mass in kg)(9.8m/s2)(height in meters) |
| Does the speed of an object affect its POTENTIAL energy? | No. Potential energy depends on mass, gravity (9.8m/s2), and height above ground. GPE = mgh |
Created by:
science9maplelake
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