Work done
What is the food unit for work done?
Calorie
What is the name of the energy connected to movement?
Kinetic energy
What is the name of the energy we do not use?
Wasted energy
What are the three states of matter?
Solid, liquid and gas
Why are there gaps in a railway tracks?
Because metal expands in heat and it could bend or break the railway.
What is the SI unit for work done?
Joule
What is the name of energy we get from a sun?
Radiation/light energy
Create energy flow diagram for a flashlight.
Chemical energy - Electrical energy - Light + sound energy
Very far apart
What household item uses bimetallic strip?
Fire alarm and heaters
What is the symbol for work done?
W
What are the 2 types of electrical energy?
Static electricity and current electricity
What do we put in Sankey diagram?
Input energy - useful energy + wasted energy
How do particles move in solid when it's heated up?
They vibrate and expand
What are some real life examples of expansion or contraction of gas?
Hot air balloon/Explosions
What is the formula for calculating work done?
W = F x d
What is the name of energy that comes from radioactive elements?
Nuclear energy
If car uses 200J of energy and 137J of it is used for movement, how much is wasted on heat energy?
63J
What happens to a gas that is cooled down to a liquid?
It condensate
Where can we apply knowledge about expansion of liquid?
Thermometers
What is definition of work done?
Force that moves object through a distance in direction of the force
What are three types of stored/potential energy?
Chemical energy, elastic energy and gravitational energy
What is the law of conservation of energy?
Energy cannot be created or destroyed, but it can be changed to another type
What is the name of the action when solid changes straight to a gas?
Sublimation
What do water do when it freezes?
Expands