Energy transfer
What is the conservation of energy
Energy can not be created nor destroyed
Radiation requires a medium, Yes or No?
No
The difference between strength and power?
Power is the ability to do strength at speed
What is the difference between Renewable and Non-Renewable energy?
Renewable Energy does not dissipate over time. (The sun is always up during the day)
Name 2 non-renewable sources
Fossil fuels
Nuclear energy
What are the 4 possible ways energy can be transferred?
- Mechanically
- Electrically
- Heating
- radiation
A stage when the temperatures of two objects are equal.
The two requirements of work done?
Force & Movement due to the force
Define the term, 'clean' electricity. (think simple, do not overcomplicate).
Electrical power generated by renewable energy sources.
What is the issue with fossil fuels
Greenhouse gas
global warming
Heating
Ice caps melting
Flooding
The snaky diagram shows?
The amount of energy wasted from the input, how much is useful
Where does conduction take place
In metals
Describe the reationship between GPE & KE (ideal system)
The change in GPE and KE are the Same
How does tidal energy result in electricity
Wind blows the propeller
Propeller spins
induces voltage
induces current
Fossil Fuels, what were they initially?
Compressed underground for millions and millions of years.
How do we calculate the efficiency of energy output?
Formula
Where does convection take place
Fluids, gas and liquids
Kinetic energy is scalar or vector? Why?
Scalar; the formula for kinetic energy is 1/2 x mass x speed2 ---> speed2 is scalar as there is no longer distance.
What are the advantages of Solar energy
- Do not produce greenhouse gasses
- No noise
With Nuclear energy,
Is the cost for electricity produced is cheap & the nuclear power plants are expensive to build.
Or
Is the cost for electricity produced is expensive & the nuclear power plants are cheap to build.
The cost for electricity produced is cheap & the nuclear power plants are expensive to build.
18000 J useful energy
40000 J Total energy
Calculate the efficiency
18000/40000 x 100 = 45%
Describe what happens as a metal rod is heated from one side (in terms of particles)
thermal energy
particles vibrate
collide with each other
creates heat
What test would you conduct to discover how much power you can output?
Staircase sprint test
Name all the renewable energy sources in 4 seconds
Tidal
Geothermal
Wind
Solar
Hydroelectric
Put each type of energy in order of efficiency
tidal
wind
nuclesar
fossil fuels
solar
Hydro power
Hydroelectric
Tidal
Fossil fuels
Nuclear
Wind
Solar