Question

resuming the mass of subatomic particle is 9.1 into 10 to the power minus31 kg calculate the kinetic energy and wavelength in the velocity is 10^3 m/sec
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Answer 1

Answer:

Calculate the wavelength of a particle of mass m=6.62*10^-27kg moving with kinetic energy 7.425*10^... What will be the de broglie wavelength of a fast moving electron with kinetic energy of 4 electron ... The kinetic energy of an electron is 4.55 x 10-25 j. the mass of electron is 9.1 x 10-31 kg.

Answer 2

Answer:

Given that,

The mass of an electron=m= 9.1×10

−31

kg .

K.E.=3.0×10

−25

J

The velocity of the electron is obtained from its kinetic energy.

v=

m

2K.E

=

9.1×10

−31

2×3.0×10

−25

=812m/s

The wavelength of electron is,

λ=

mv

h

h=Plank's constant= 6.626×10

−34

=

9.1×10

−31

812

6.626×10

−34

=8953×10

−10

m=8953

0

A.