Past Papers Flashcards
Advantages of nuclear power plants
No CO2 emissions
Little fuel needed for more energy
Longer operating life than coal power stations
What are the advantages of underground electrical wiring?
Cannot be seen
No hazard to aircraft
Won’t be damaged by weather
Reduced shock hazard
Why are solids fixed and hard to compress?
No space for particles to get closer
Strong forces of attraction
Forces become repulsive if particles are too close
Why are gases able to move freely?
Spaced out particles
Random movement
No forces of attraction
What type of electromagnetic wave changes the colour of food being baked?
Infrared
Why are some ovens shiny inside and out?
Inside - heat is reflected
Outside - heat is not emitted much
What do Hz represent?
Waves per second
What is amplitude?
The height of a wave
Represents volume
What are the effects of CO2?
Climate change
Global warming
Greenhouse effect
What is the unit for specific heat capacity?
J/Kg^c
Describe a longitudinal soundwave
Oscillations parallel to direction
Compressions and rarefactions
Why is it not economical to connect remote mountain communities to the national grid?
Produce little energy
Expensive to install so much cable
Why is heating food in a saucepan over a gas flame inefficient?
Heat energy is wasted and lost to the surroundings
Why are data logging thermometers better?
Higher resolution
Automatic measuring
Don’t have to remove to read
More accurate
Factors other than material that impact rate of energy transfer
Thickness
Power of hot object
