## Question

The kinetic energy of a 300 K thermal neutron is

### Solution

0.026 eV

The kinetic energy of a neutron at absolute temperature *T* is

where *k* is Boltzmann constant. thus

= 0.026 eV.

#### SIMILAR QUESTIONS

The ionization energy of hydrogen atom is 13.6 eV. Hydrogen atoms in the ground state are excited by electromagnetic radiation of energy 12.1 eV. How many spectral lines will be emitter by the hydrogen atom?

If an orbital electron of the hydrogen atom jumps from the ground state to a higher energy state, its orbital speed reduces to half its initial value. If the radius of the electron orbit in the ground state is *r*, then the radius of the new orbit would be

The orbital speed of the electron in the ground state of hydrogen is *v*. What will be its orbital speed when it is excited to the energy state –3.4eV.

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Cal to protons ever attract each other?

How much energy is released when one amu is wholly converted into energy?

In the equation

,

The correct symbol for *X* is

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