Q: How do determine planck's constant?

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No, gas constant is having a value of 8.314Jk-1mol-1 Whereas plancks constant has a value of 6.6*10-31

wavelength since frequency =hc/lambda h=plancks constant and c=velocity of light

Planck's constant relates the energy level of radiation due to electrons moving from one energy level to another, by the formula Energy = (Planck's constant) x (frequency of radiation). Therefore the dimensions of Planck's constant are (energy)/(frequency) which means Joules x seconds In fact Planck's constant = 6.67 x 10-34 joule.seconds.

I assume the equation you're looking for is E=hv or E=hc/lambda. h is plancks constant and c is speed of light in m/s. lambda is in metres

No, it isn't possible to make a perfect circle because of plancks distance.

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led is used to determine Plancks constant

No, gas constant is having a value of 8.314Jk-1mol-1 Whereas plancks constant has a value of 6.6*10-31

(E) Photon=E2-E1= hv h=Plancks constant v=frequency

Wavelength = Plancks constant / (Mass x Velocity)

wavelength since frequency =hc/lambda h=plancks constant and c=velocity of light

determine if the momentum of an object moving in a circular path at constant speed is constant.

Planck's constant relates the energy level of radiation due to electrons moving from one energy level to another, by the formula Energy = (Planck's constant) x (frequency of radiation). Therefore the dimensions of Planck's constant are (energy)/(frequency) which means Joules x seconds In fact Planck's constant = 6.67 x 10-34 joule.seconds.

Such a melange of dimensions would involve length3 mass2/time4 .Not only has it no physical significance, but, fortunately for all of us,there is no such formula.

you need units

use the equation E = hf where h is plancks constant E = 410E 7 * 6.63E -34 E = 2.7183E -23 joules

The Quantum Theory.

We need to know the equation E=h where h=plancks constant . From this equation you can see that energy and frequency are directly related ( one increases as the other one dicrease )