13 cm
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The density is 4.76 gcm^-3
and if mass is in kg then density is equal to 4.76*10^-3
Answer: 
Explanation:
The de Broglie wavelength 
is given by the following formula:
(1)
Where:
is the Planck constant
is the momentum of the atom, which is given by:
(2)
Where:
is the mass of the electron
is the velocity of the electron
This means equation (2) can be written as:
(3)
Substituting (3) in (1):
(4)
Now, we only have to find :
>>> This is the de Broglie wavelength of the electron
Answer:
D) Reduce the time interval during which the magnitude of the field increases.
