Resistance ∞ (proportional) length
resistance ∞ 1/ area
therefore,
(the constant that we take is known as the resistivity)
resistance = (resistivity*length )/ area
resistivity = (resistance * area ) / length
= (3 * 45) / 3 = 135/3 = 45 Ωm
in short your answer is 45 Ωm
Periodic motion implies that the ride oscillates back and forth. The period is the time it takes to complete one cycle. Therefore it would be the swing.
The magnitude of the action–reaction pair between the two boxes (A and B) will be "18.2 N".
According to the question,
Mass of box A,
Mass of box B,
Horizontal force,
From the Newton's law,
→ 
or,
→ 
Bu substituting the values, we get
→ 
→ 
→ 
We can see that between the two boxes, the action-reaction pair exist.
then,
→ 
→ 
→
(magnitude)
Thus the above solution is appropriate.
Learn more about the magnitude here:
brainly.com/question/13545862