. 23. Which wave has the same frequency as wave A? a. wave B b wave C c. wave D

Question

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23. Which wave has the same frequency as wave A? a. wave B b wave C c. wave D 24. Compared to wave A, which two waves have greater frequencies? a. waves B and C b. waves B and D c. waves Cand D 25. The pitch of a musical sound depends on the sound wave's a. wavelength. b. frequency c. speed. d. amplitude e. all of these. 26. A Doppler effect occurs when a source of sound moves a. toward you. b. away from you c. both of these d. none of these waves shown above. Compare nd complete the followingo 27. Derived units are best defined as: A. measurements made using electronic equipment. B. units containing an exponent such as m2 C. measurements based on a non-metric system. D. combinations of two or more basic measurements. which wave has the same way

Explanation / Answer

23) c) wave D because the crest and trough of both waves occur at same times always, this means both have the same number of cycles per second.

24) a) Waves B and C since the number of waves per sec is more in B and c as compared to A.

25) b) frequency, pitch depends on the frequency of sound.

26) c) both of these, Doppler effect will occur whenever there is a relative motion between the source and the observer.

27) D) combinations of two or more basic measurements. eg: Newton is derived unit from Kg ,m and second

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