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dexar [7]
3 years ago
11

​What is the wavelength of an electron that has a kinetic energy of 0.50 MeV (relativistic)?

Physics
1 answer:
NikAS [45]3 years ago
3 0

Answer:

The wavelength of electron is 6.99\times 10^{-22}\ m

Explanation:

The kinetic energy of the electron is, E=0.5\ MeV=0.5\times 10^6\ eV

We need to find the wavelength of this electron. It can be calculated using the concept of DE-broglie wavelength as :

\lambda=\dfrac{h}{\sqrt{2mE} }

h is Plank's constant

m is the mass of electron

\lambda=\dfrac{6.67\times 10^{-34}\ J-s}{\sqrt{2\times 9.1\times 10^{-31}\ kg\times 0.5\times 10^6\ eV} }        

\lambda=6.99\times 10^{-22}\ m

So, the wavelength of electron is 6.99\times 10^{-22}\ m. Hence, this is the required solution.

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A piece of glass has a temperature of 72.0 degrees Celsius. The specific heat capacity of the glass is 840 J/kg/deg C. A liquid
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Answer:

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Explanation:

Given that

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C(l) = 840 * (72 - 57) / (57 - 40)

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