What is k in the formula (3/2)kT
It's called the Boltzmann constant and I have already told you the value in your duplicate post. It equals the molar gas constant R divided by Avogadro's number.
Bolzman constant
In the formula (3/2)kT, k represents the Boltzmann constant. The Boltzmann constant (k) is a fundamental physical constant that relates the energy of a particle to its temperature.
To find the value of k, we need to refer to a reliable source such as a physics textbook or scientific reference. The value of the Boltzmann constant is approximately equal to 1.380649 × 10^(-23) joules per kelvin (J/K).
So, in the formula (3/2)kT, you would substitute the value of k with its numerical value.