Question

a wave moves with speed 300m/s on awire which is under a tention of 500N
. find how much the tention must be changed to increase the speed to 312m/s

Answer 1

v is inversely proportional to the square root of tension.
do you need further help?

Answer 2

yup

Answer 3

since: \(v=\sqrt \frac{T}{m}\)where m is the mass perlength, a constant,
rearranging, \(\frac{v_1}{\sqrt T_1}=\frac{v_2}{\sqrt T_2}\)
sub it all in.