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
