Question

Plz answer the question no 1

Answer 1

Answer:

(4) 1/81

Explanation:

change in length is by the factor of 9

and area is l^2

thus area change is 9^2 = 81

hence stress is equal to the force per unit area

therefore change in stress is equal to the force/ change in area which is

1/81

hope it will be cleared to you

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