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Q.1 The sound produced by a bat is - (a) Ultrasonic (b) Infrasonic (c) Audible (d) Subsonic Q.2 When a bar…
By -Saturday, October 06, 2012
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Q.1 The sound produced by a bat is - (a) Ultrasonic (b) Infrasonic (c) Audible (d) Subsonic Q.2 When a bar…