Electric field due to a point charge is given as

here we know that

also the distance is given as

now we will have

so we will have

so above is the electric field due to proton
Answer:
center of mass = −0.50 m
Explanation:
given data
mass m1 = 3.04 kg
distance xm = -8 m
mass m2 = 5.61 kg
distance xM = 3.56 m
solution
we get here center of mass for n mass of system that is express as
center of mass =
......................1
but we have only 2 particle system so we will get
center of mass =
.................2
put here value and we will get
center of mass = 
solve it we will get
center of mass = −0.50 m
Answer:
2.92682 m

250000000000 Hz

0.21126 m
0.12244 m
Explanation:
c = Speed of light = 
= Wavelength
f = Frequency
Wavelength is given by

The wavelength is 2.92682 m
Frequency is given by

The frequency is 

The frequency is 250000000000 Hz

The wavelength is 

The wavelength is 0.21126 m

The wavelength is 0.12244 m