P1

Equations for speed, Pressure and density

Equations for speed, Pressure and density

Speed = distance/time
Pressure = force/area
Density = mass/volume

Define Specific Heat Capacity

Specific heat capacity is the amount of energy required to raise the temperature of 1 kg of a substance by 1 °C.
However, can be the amount of energy released by a substance as it cools. 

What is the equation to calculate SHC

Energy = mass x SHC x change in temp
SHC = Energy/(mass x change in temp)

Define Specific Latent Heat

The specific latent heat is the energy required to change 1kg of a particular substance from one state to another, without a change in temperature.

Difference between latent heat of fusion and vaporisation

The specific latent heat of refers to when a substance changes from a solid to a liquid (or vice versa)
The specific latent heat of refers to when a substance changes from a liquid to a gas (or vice versa)

Equation for SLH

Energy transferred = mass x SLH
SLH = Energy transferred/mass

Define power with the equation

Power- amount of energy transferred per second
Power = energy/time

How temperature affects pressure of a gas

In a container of fixed volume, if temperature increases, particles have more kinetic energy. There are more frequent collisions with the sides of the contain with more force so pressure increases

How does volume affect pressure of gas

In a container of fixed temperature, if volume increases, average distance a particle travels increases so there are less frequent collisions between particles and container wall so pressure decreases

What is the atmosphere made of

Nitrogen
Carbon Dioxide
Oxygen

Relationship between altitude and pressure

As elevation/altitude increases, the atmospheric pressure decreases

Equation for liquid pressure

Pressure = density of a liquid x gravitational field strength x height
P = p x g x h

What is upthrust caused by

The pressure on the bottom of the object being greater than the pressure on the top of the object