It will be 3 wavelengths because 1 cycle = 1 wavelength.
The work W done by the electric field in moving the proton is equal to the difference in electric potential energy of the proton between its initial location and its final location, therefore:

where q is the charge of the proton,

, with

being the elementary charge, and

and

are the initial and final voltage.
Substituting, we get (in electronvolts):

and in Joule:
Answer:
b. melting
Explanation:
it is made of sediments and that is not necessary