Energy And The Future

Question 1

What are the nine types of energy

Answer 1

Electrical (where a current flows)
Light
Sound
Kinetic (anything moving)
Nuclear
Thermal
GPE (in anything that could fall)
Elastic potential (springs) 
Chemical (food)

Question 2

What is stored energy

Answer 2

Gravitational potential
Elastic potential
Chemical

The energy isn’t doing anything it’s waiting to happen

Question 3

What is the principle of conservation of energy

Answer 3

Energy can never be created or destroyed only transformed from one type to another

Eg electronic devices convert electrical energy to sound light and heat

Question 4

Efficiency =

Answer 4

Useful output/ X100

Total input

Question 5

What is thermal radiation

Answer 5

Infrared
All objects are emitting heat radiation
If an object is hotter than its surroundings it emits more radiation than it absorbs as it cools down
If the objects is cooler than it’s surroundings then it absorbs more radiation than it emits as it warms up

Question 6

What colours absorb the most heat

Answer 6

Dark matte absorb the most heat radiation

Silver surfaces reflect the heat Radiation

Question 7

How do solar hot water panels work

Answer 7

They contain water pipes under a black surface

Heat radiation from the sun is absorbed by the black then heats the pipes

Question 8

How do survival blankets work

Answer 8

A silver banker reflects the heat radiation and keeps the person warm

Question 9

What is Leslie’s cube

Answer 9

There’s a white, Matt black and sliver surface with Hot water in it
There’s four thermometers, one on each side the Matt black one emits the most heat

Question 10

What is the melting wax trick

Answer 10

There’s a Matt black and a silver each with wax on them
They’re both heated
The black absorbs the heat and melts the wax but the silver reflects the heat