P3- Sustainable Energy OCR 21st century 0.0 / 5 ? PhysicsP3- Sustainable EnergyGCSEOCR Created by: Liem Mao-TranCreated on: 23-03-16 17:45 What equation links energy transferred, power and time? Energy transferred = Power x Time 1 of 10 What units are used in the energy transfer equation? Joules/Kilowatt-Hours = Watts/Kilowatts x Seconds/Hours 2 of 10 What equation is used to find the cost of eletrical appliances? Cost = Number of kWh x Cost per kWh 3 of 10 What is the formula for eletrical power? Power (in W) = Voltage (in Volts) x Current (in Amps) 4 of 10 How do you find the effciency of an object? Useful energy transferred / Total energy supplied x 100% 5 of 10 What is a sankey diagram? A digram on energy 6 of 10 Name a method of getting electricity without producing CO2 emmisions. Nuclear energy/Wave power/Tidal Barrages/Geothermal energy/Hydroeletrcity 7 of 10 What is the danger of Nuclear energy? Nuclear radiation can escape and get into the human body causing cancer. 8 of 10 Why are fossil fuels running out? They are run out due to human usage as they are being used quicker than they can be made. 9 of 10 What is the National Grid? The National Grid is the network of pylons and cables that covers Britain 10 of 10
Comments
No comments have yet been made