Across
- 5. is the reduction of something harmful or the reduction of its harmful effects. It may refer to measures taken to reduce the harmful effects of hazards that remain in potentia,or to manage harmful incidents that have already occurred.
- 8. The use of scientific principles to design and build machines, structures, and other items, including bridges, tunnels, roads, vehicles, and buildings.
- 10. This s the conversion of light into electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon studied in physics, photochemistry, and electrochemistry.
- 12. A ___________ circuit is a 'push to make' switch that allows electricity to flow between its two contacts when held in. When the button is released, the circuit is broken.
- 14. A gravity-powered lamp designed by the company Deciwatt for use in developing or third-world nations, as a replacement for kerosene lamps
- 17. This type of energy is the sum of potential energy and kinetic energy. It is the macroscopic energy associated with a system.
- 18. A Rube __________ machine, named after an American cartoonist, this machine is a chain reaction-type machine or contraption intentionally designed to perform a simple task in an indirect and overly complicated way.
- 20. A radioisotope _______________generator (RPG) is a type of radioisotope generator that converts energy stored in radioactive materials into motion, which is used to generate electricity using the repeated deformation of a piezoelectric material.
Down
- 1. a relation between coordinates and momenta.
- 2. This is the phenomenon in which an object changes its position over time.
- 3. energy is radiant light and heat from the Sun that is harnessed using a range of ever-evolving technologies such as solar heating, photovoltaics, solar thermal energy, solar architecture, molten salt power plants and artificial photosynthesis.
- 4. This type of energy is useful energy that is collected from resources which are naturally replenished on a human timescale, including carbon neutral sources like sunlight, wind, rain, tides, waves, and geothermal heat.
- 6. The electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye.
- 7. the Independent variable in a mathematical function or the work done by force applied simple machine.
- 9. This is a mill that uses hydropower. It is a structure that uses a water wheel or water turbine to drive a mechanical process such as milling (grinding), rolling, or hammering.
- 11. Solar water heating (SWH) is heating water by ___________ using a solar thermal collector. A variety of configurations is available at varying cost to provide solutions in different climates and latitudes. SWHs are widely used for residential and some industrial applications. A sun-facing collector heats a working fluid that passes into a storage system for later use.
- 13. A wind_________, or wind energy converter, is a device that converts the wind's kinetic energy into electrical energy.
- 15. The _________ energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
- 16. devices that convert mechanical energy to electrical energy.
- 19. - A device that uses centrifugal force to separate various components of a fluid. This is achieved by spinning the fluid at high speed within a container, thereby separating fluids of different densities (e.g. cream from milk) or liquids from solids.