Elliott Tong P1
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What happens to particles when they rise?
They become less dense.
Can a device be 100 percent efficient?
What are the 3 ways of heat transfers?
Conduction, Convection and Radiation
What is the best reflector of infa red radiation?
A white and shiny surface.
What are the 3 states of matter that kinetic theory can explain?
Solids, Liquids and Gases
What does conduction mainly occur in? (ie matter)?
Why are metals good conductors?
It's because of their free electrons.
What matter can convection peform in?
Liquids and Gases.
What happens in condensation?
A gas turns into a liquid.
What happens in evaporation?
A liquid turns into a gas.
How can you attempt to ensure that you don't lose any heat in a house?
- -Cavity Wall Insulation
- -Loft Insulation
- -Draught Proofing
- -Hot water tank jacket
- -Thick curtains.
What does heat transfer faster in a surface with:
a) high U values
b) low U values
a) high U values
What does specific heat capacity tell us?
How much energy something can store.
What's the formula for Specific Heat Capacity?
E= M x C x theta
Name the 9 types of energy.
- light energy
- sound energy
- kinetic energy
- nuclear energy
- thermal energy
- gravitational potential energy
- elastic potential energy
- chemical energy
What type of energy are gravitational potential and chemical energy?
They are stored energy
In a sankey digram how do you calculate the amount of energy in each output/input?
From the width of the arrows.
What is the equation for the amount of energy used by using an appliance?
Energy= Power x Time
'standard living isn't affected by the access to electricity' True or False.
False, it is affect by the access to electricity.
What is the equation to find out the cost of a supply of energy?
Cost= No. of Units x Price per unit
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