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Total number of series in hydrogen spectrum is_____________?

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The number of waves per second in a sound is called ________ of that sound. Assertion (A) Light year and wavelength both measure distance. Reason (R) Both have dimension of time. In AC circuits, AC meters measure A simple machine helps a person in doing Consider the following statements. 1. A flute of smaller length produces waves of lower frequency. 2. Sound travels in rocks in the form of longitudinal elastic waves only. Which of the statements given above is/are correct?