Burning waste ______ energy that can be used for electric power or heating.
yields
举一反三
- Burning waste ( ) energy that can be used for electric power or heating. A: gathers B: yields C: supplies D: accumulates
- 10. Burning waste ______ energy that can be used for electric power or heating. A: supplies B: accumulates C: gathers D: yields
- Heat energy and energy are the middle processes of energy transformation in an electric power plant.
- A 3.3kW electric heater is connected to a 220VAC supply. （1）Calculate the current drawn from the supplyA. （2）Calculate the resistance of the heating element（2.s.f.）Ω （3）Calculate the energy (in kWh) used by the heater in a 24 hour periodkWh （4）If the supply voltage drops to 208V, what is the power used by the heater.kW（2s.f.）
- Heat energy and energy are the middle processes of energy transformation in an electric power plant. (chemical / mechanical)
内容
- 0
Getting renewable sources of energy or electric power in your homes can be achieved by making use of ____________(绿色技术设备或资源）
- 1
If 300g of standard coal is used for 1kW.h of electric energy in a power station, the efficiency of generating electricity is (). A: 31% B: 41% C: 51% D: 61%
- 2
Solar panels, wind turbines, hydro power and geothermal energy and hydrocarbons (natural gas or coal) can all be used to produce hydrogen (a primary energy).
- 3
Electric power is an indispensable energy on board, so _____ plays a role in distribution, conversion and control of electric power on board. A: power supply unit B: distribution device C: power network D: load
- 4
The most important form of energy is electric energy, which is (wide) _____ used in our daily life.