Answer:
a.
b.Attractive
Explanation:
We are given that


Mass of an electron,
Mass of proton,
Distance between electron and proton,R=

a.Substitute the values then we get


b.We know that like charges repel to each other and unlike charges attract to each other.
Proton and electron are unlike charges therefore, the force between proton and electron is attractive.
Answer:
B. -40 kgm/s is the answer
Answer:
= 2.471 yards/s
Explanation:
We can calculate the average velocity thus:

Where
: First 25 yards
: Time to travel 
: Seconds 25 yards
: Time to travel 
Thus

= 2.471 yards/s
Answer:
electrons
Explanation:
electrons are the only subatomic particle that flow
Answer:
The magnetic field strength, the energy density, and the power flow per unit area are
,
and 13.18 W/m².
Explanation:
Given that,
Electromagnetic wave strength E= 70.5 V/m
(I). We need to calculate the magnetic field strength
Using formula of Electromagnetic wave strength




(II). We need to calculate the energy density
Using formula of energy density




(III). We need to calculate the power flow per unit area
Using formula of poynting vector

Put the value into the formula


Hence, The magnetic field strength, the energy density, and the power flow per unit area are
,
and 13.18 W/m².