I would say the correct answer would be light travels faster in medium 3 then medium 2.
The magnetic field midway between the two wires is
.
It is given that Two long parallel wires carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m.
We need to determine the magnetic field midway between the two wires.
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.
A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.
Magnetic field is a place in space near a magnet or an electric current where a physical field is created from a moving electric charge that creates force on another moving electric charge.
B=B1+B2
=
= 
= 
Hence, the magnetic field midway between the two wires is 
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The total force on the ground due to the bricks is 47,040 N.
<h3>
Total force on the ground</h3>
The total force on the ground due to weight of the bricks is calculated as follows;
Fₙ = mg
where;
- Fₙ is normal force
- m is mass of the brickes
- g is acceleration due to gravity
Fₙ = (1500 x 3.2) x 9.8
Fₙ = 47,040 N
Thus, the total force on the ground due to the bricks is 47,040 N.
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