Question

please answer the ticked Q's

Answer 1

12.amplitude=12 cm
wavelength=36 cm
velocity of wave = wavelength × frequency
=.36×200=72 m/s

13.amplitude=5 cm
wavelength =20 cm
velocity of the wave=frequency×wavelength
=.20×100= 20m/s

Answer 2

12.
1. amplitude=12 cm
2.wavelength=36 cm
3. velocity =200×36
=72000cm

13.
1.amplitude=5cm
2.wavelength=20cm
3.velocity=20×100
=20000cm