Wave motion (3)

Two waves of frequency512 Hz and 256 Hz, propagates in air

i) the ratio between their velocities is...

• 2 : 1

• 1 : 2

• 1 : 1

The relation between the wavelength of a wave in a certain medium and the

frequency of different tuning forks represented as shown , find (X)

• 120 sec

• 120 Hz

• 0.2 hz

If the distance between the second crest and the seventh crest is 20 m , and the time

passed from the first crest and the fifth crest is 0.1 second Find Wave velocity

• 160 m/s

• 40 m/s

• 1.6 m/s

what happened if sound wave propagates from higher velocity medium to lower velocity medium

• Wavelength increase

• Frequency decrease

• Periodic time remain constant

Sara is at a distance from the school, if 50 waves produced from the school bell to

reach Sara and the frequency 200 Hz and the velocity 340 m/s , find the distance

between Sara and the school.

• 1.5 m

• 85 m

• 100 m

If the periodic time increases to double, and the velocity is constant.

The wavelength ...

• doubled

• Halved

• Remain constant