Heat
The thermal energy contained in an object
Temperature
A measure of the average KE of a particle
When heat energy is transferred to an object, its temperature will...
Increase
Temp rise will be effected by...
The mass of the material
What the material is
The amount of thermal energy supplied to the material
Definition of SCH
The amount of heat energy needed to raise
the temp. of 1 kg of
a material by 1°C
Equation for SHC
E = m x c x delta theta
What are theunitx of the equation for SHC
J / kg / °c
What does SCH mean?
Different materials need different amounts of thermal energy to raise their temp
By heating 1 Kg of material u can compare
How do you measure the SHC of metals?
Heat a 1 kg block of metal
Measure the temp rise every minute
Calculate the thermal energy gained by using the formula
Equation for the change in thermal energy...
P.d x current x time (power x time)
Is the SHC of water high or low?
Very high
Specific latent heat
The heat energy required to make 1 kg of substance change state at a constant temperature
SLH equation
Energy = mass x Specific heat capacity
Calculating % uncertainty
Your value for L - accepted value for L
Divide the answer by the accepted value
Multiple by 100
Pressure equation
Pa = height × density of fluid × gravitational field strength
Gas pressure equation
P = F / A
pressure...
The force applied per unit surface
Is pressure indirectly or directly proportional to volume?
Indirectly
What is the equation for pressure and volume?
PV = a constant
Pressure equation
P = F / A
Density equation
Density = mass ÷ volume
Why does an object flow?
Because its density is less than the density of liquid
Rutherfords experiment...
R fired alpha particles at a thin piece of gold foil
The plum pudding model would predict that all would pass through
R found that a few bounced back
What was rutherfords conclusion?
A very small central nucleus with a positive charge
Nearly all the mass is in the nucleus
Negative charges orbiting at a relatively large distance from the nucleus