Basic definitions and formulae Flashcards
What is temperature?
(With any calculations)
The average kinetic energy of particles
Kinetic energy = (1/2 e.g. a half) mv2
m = mass
v = velocity
What is pressure?
The force exerted by particles impacting with the walls of their container, per unit area of where the force is distributed
P = F/A
P = pressure
F = force
A = area
What is force?
Is an influence that changes or tends to change the state of rest or motion of an object
F = ma
F = force
m = mass
a = acceleration
What is acceleration?
It is the rate of change in velocity
a (with a line over the top) = delta v / delta t
a with line = average acceleration
Delta v = change in velocity
t = time
(YouTube)
What is inertia?
The tendency of an object to resist a change in velocity
What is momentum?
The property of a mass in motion e.g. the quantity of motion
P = mv
P = momentum (vector)
m = mass
V = velocity (vector)
What is weight?
The force of gravity acting on your mass, expressed in Newtons
What is critical temperature of a gas?
The temperature above which gas cannot liquefy no matter what pressure is exerted on it
What is the critical pressure of a gas?
Is the saturated vapour pressure of a substance at its critical temperature.
What is solubility?
Is the volume of gas dissolved in a volume of liquid
What is density?
Calculation
Units
Mass per unit of volume
p = m/V
P= kg/m3
What is the specific gravity of a gas?
Gas density/air density
What is viscosity?
Units
The tendency of a fluid to resist flow (weird long n)
Poise (P)
What is flow?
Units
Movement of mass from one place to another per time unit
Kg/s
What does a stationary object have in terms of momentum and inertia?
It has inertia, but no momentum
What is mass?
The property of an object that specifies how much inertia it has
E.g. the higher the mass the more difficult it will be to start accelerating and to decelerate at the end