Question

Pls answer the 4th question!!!.......

Answer 1

the wavelength= frequeny ×speed

        f=5; speed=10m/s ;chek below

      wavelength=5/10

                        =0.5 cm

the frequency(f) = no.of vibration in one second

        1 crest + 1 trough=1 vibration

      f= 15/3

        f =5

wave speed= length of first vibration/time taken

length of first vibration= 2 cm

from above v found: time taken to produce 5 vibration = 1 send

therefore: time taken to  produce 1 vibration= 1/5

wave speed=2÷1/5

          =10 m/s

HOPE I HELPS