Asteel guitar string with a diameter of 0.300 mm and a length of 70.0 cm is stretched by 0.500 mm while being tuned. how much force is needed to stretch the string by this amount? young's modulus for steel is 2.0 × 1011 n/m2

10.1 N

Explanation:

Your answer is 10.1 N, I don't actually know how to do it but I hope it helps.

answer: i pick a

explanation:

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .