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True or false? (a) Frequency increases if amplitude is increased. (b) A bat uses the principle of the radar system while flying at night. (c) Ultrasonic sounds are produced in the sonar system. |
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Answer» True or false? (a) Frequency increases if amplitude is increased. (b) A bat uses the principle of the radar system while flying at night. (c) Ultrasonic sounds are produced in the sonar system. |
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