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johncena
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How plank's constant and Avogadro number was determined?
Planck's Constant is a fundamental physical constant that represents the quantum of action in quantum mechanics. It is denoted by the symbol 'h' and has a value of approximately 6.626 x 10^-34 joule-seconds.
Planck's Constant is used in the equation that relates the Avogadro Number (a measure of the number of particles in a given amount of substance) to the mass of a single particle. This equation, known as the Avogadro Constant, allows us to calculate the Avogadro Number by measuring the mass of a particle and knowing the value of Planck's Constant.
Planck's Constant is typically measured using a device called a Kibble balance, which measures the relationship between electrical and mechanical forces. It can also be measured using other methods, such as the photoelectric effect or Compton scattering.
Planck's Constant is considered fundamental because it is a universal constant that is independent of any specific system of units. It is a fundamental building block of quantum mechanics and is used in many equations to describe the behavior of particles on a microscopic level.
Planck's Constant is directly related to energy. It is used to calculate the energy of a photon in the equation E = hf, where E is energy, h is Planck's Constant, and f is the frequency of the photon. It is also used in other energy equations, such as the Schrödinger equation and the Heisenberg uncertainty principle.