question_answer

Linear density of a string of is \[1.3\times {{10}^{-4}}\text{ }kg\text{/}m\] and wave equation is\[y=0.021\text{ sin}\,\left( x+30\,t \right)\]. Find, the tension in the string where, x in metre and t in second.

A)  0.12 N           

B)        0.21 N

C)  1.2 N             

D)         0.012 N