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CBSE Class 9 Answered

Please answer these Questions:
Asked by omprakasharya123 | 14 Feb, 2011, 06:12: AM
Expert Answer
Dear student
You are requested to post each question individually.
1(i) frequency = no. of waves / second = 15/ 3 = 5 Hz
(ii) wavelength = distance between the crest and trough = 10 cm = 0.1 m
(iii) velocity = frequency x wavelength = 5 x 0.1 = 0.5 m/s
2. Frequency = 1/ Time period = 2000 Hz ; velocity = 400 m/s
hence, wavelength = velocity / frequency = 400 /2000 = 0.2 m
Hope this helps.
Regards
Team
Topperlearning
Answered by | 14 Feb, 2011, 03:47: PM
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