Across
- 3. strength or energy as an attribute of physical action or movement gear one of a set of toothed wheels that work together to alter the relation between the speed of a driving mechanism (such as the engine of a vehicle or the crank of a bicycle) and the speed of the driven parts (the wheels)
- 5. energy the energy released during nuclear fission or fusion, especially when used to generate electricity
- 7. energy renewable energy source from living or recently living plant and animal materials which can be used as fuel
- 9. form of energy generated by the conversion of free-falling water to electricity;
- 10. the branch of physics or technology concerned with the mechanical properties of gases
- 11. a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other
- 12. energy hydropower that converts the energy of tides into useful forms of power – mainly electricity
Down
- 1. advantage the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine
- 2. energy the use of air flow through wind turbines to mechanically power generators for electric power
- 4. energy heat energy generated and stored in the Earth
- 6. energy radiant energy emitted by the sun
- 8. involving mental or physical effort done in order to achieve a purpose or result