Question

A stone is dropped from a 50 m tall building into a pond. When is sound of splash heard at the top? (g=10m/s2 , speed of sound in air= 340m/s)?​

Answer 1

 given height,s=500m

               g=10

      speed of sound =340

 on analysing we get that  we have to find time period

first analyze the data and apply different formulas for it then see which formula suits the best.

        the formula that should be used here is

                                  s=ut+1/2at2

                         u=0,

                 500=0+1/2x10xtxt

we get t=10 sec

 now the time for the resound=500/340=1.47 sec

 total time=10+1.47=11.47 sec

Answer 2

hope you will understand