formulae that has to be learnt

Question 1

F = p/t

Answer 1

Resultant force is equal to the rate of change of momentum (this is an alternate for of Newton’s second law)

Question 2

V = W/Q or V=E/Q

Answer 2

Potential difference is equal to the energy per unit charge or the work done per unit charge

Question 3

E = hf

Answer 3

The energy of a photon is equal to Planck’s constant multiplied by its frequency

Question 4

E = hc/ wavelength

Answer 4

An alternate form of the above equation. The energy of a photon is equal to Planck’s constant multiplied by the speed of light in a vacuum, divided by its wavelength

Question 5

E = pc

Answer 5

The energy of a photon is equal to the photon momentum multiplied by the speed of light

Question 6

I = P/A

Answer 6

Intensity is power per unit area

Question 7

P = F/A

Answer 7

Pressure is force per unit area

Question 8

a = v/t

Answer 8

Acceleration is the rate of change of velocity

Question 9

P = n(hf)

Answer 9

power = number of photons x the energy

Question 10

pV = 1/2 mc(rms)^2 = 3/2 KT

Answer 10

the mean KE of molecules
(he mean KE of one atom of an ideal gas)

Question 11

p1V1/T1 = p2V2/T2

Answer 11

idk