Across
- 2. _________ done. Another way of saying energy is transferred.
- 3. The less energy transferred into 'wasted' energy stores the more ___________ a device is.
- 6. This reduces the rate of energy transfer by heating.
- 10. The amount of energy need to raise the temperature of 1kg of water by 1 degree celcius is known as __________ heat capacity.
- 11. The ____________ of energy principle states that energy can never be created or destroyed. Only transferred usefully, dissipated or stored.
- 12. Ee = 1/2ke2. The equation to calculate the amount of elastic potential energy stored in an object.
- 13. Anything which is moving has energy in its _________ energy store.
- 15. Ep = mgh is the equation for calculating the amount of energy in a gravitational potential energy store. What does the 'm' stand for?
- 16. A scientific word for wasted.
- 17. Heat transfer through solids.
- 19. Power is measured in this unit.
- 20. __________ potential energy. The energy stored in a stretched spring.
Down
- 1. _________ excluders. These can be fitted around doors and windows to reduce energy transfers by conduction in peoples homes.
- 4. Heat transfer through fluids.
- 5. This can be used to reduce frictional forces.
- 7. If a system changes energy must have been ____________.
- 8. To calculate efficiency you divide the _________ output energy transfer by the total input energy transfer and times by a hundred so it is shown as a percent.
- 9. When something falls energy is transferred from its _____________ potential energy store to its kinetic energy store.
- 14. The energy in a kinetic energy store is dependant on the objects mass and __________.
- 17. In this type of system no energy leaves and the net change in energy is zero.
- 18. ___________ potential energy. The energy stored in foods and fuels.