Physics equations

Question 1

Van ‘t Hoff Equation

(determining osmotic pressure)

Answer 1

π = iMRT

π - osmotic pressure
i - Van ‘t Hoff factor
M - molarity
R - Universal gas constant (8.31 J/K/M)
T - absolute temperature in Kelvin

Question 2

Specific heat capacity

Answer 2

c = ∆Q/m∆T

c = specific heat capacity of substance
∆Q = amount of heat energy required in kJ
m = mass of substance being heated in kg
∆T = change in temperature in K

Question 3

Stefan-Boltzmann law

Answer 3

E = sT^4

E = total amount of radiation per m^2 of an object
s = constant
T = temperature (K) of the object

Question 4

Pressure

Answer 4

pressure (Pa) = force (N) / area (m^2)

Question 5

Force of liquid in a column

(Stevin’s law)

Answer 5

F = pgh

F = force/pressure of liquid
p = density of the liquid
g = acceleration due to gravity
h - height of liquid in the column

*pressure in a column of liquid is unaffected by the area of the column

Question 6

Pressure of static fluid

Answer 6

pressure = pgh

p = density
g = acceleration due to gravity
h = height of column

Question 7

Fick’s principle

Answer 7

Amount in = amount taken up by organ + amount out

Question 8

Atomic number

Answer 8

Number of protons in the nucleus

Question 9

Atomic weight

Answer 9

Number of protons plus number of neutrons in its nucleus