1.

If `P` is the atmospheric pressure in the last problems find the percentage increase in tension of the string after heatingA. `(25)/((1 - P//P_(0)))`B. `(25)/((1 - P//P_(0)))`C. `25 (1 - P//P_(0))`D. `25 (1 - P//P_(0))`

Answer» Correct Answer - A
a. Atmospheric pressure `= P`
Tension before heating `= P_(0)A = PA`
Tension after heating `= P_(2)A - PA`
`= (5)/(4) P_(0) A - PA`
Increase in tension `= P_(0)A // 4`
% Increase = `((1//4) P_(0) A xx 100)/(P_(0) A - P.A) = (25)/((1 - P//P_(0)))`


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