Groups of atoms that line up to makes something magnetic
Answer:
potential energy at origin is 
Explanation:
given data:
electric field E = 5*10^{6} N/C
at x = 43 cm, y = 28 cm
distance btween E and origin


potential energy per unit charge 


potential energy at origin is 2.57*10^{6} volt
Answer:
stress = 16.9 MPa
Explanation:
The stress in the cable can be calculated as:

Where F is the force and A is the area. So, the area can be calculated as:

Where r is the radius. Since the radius is half the diameter, the radius is 4.0 mm and the area will be equal to:

Then, replacing the force F by 850 N, and A by 50.24 mm², we get that the stress is equal to:

Therefore, the answer is 16.9 MPa
100. A centimeter is a 100th of a meter.