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Peer reviewedYunus, W. Mahmood Mat; Ahmad, Maulana – Physics Education, 1996
Describes a simple ultrasonic experiment that can be used to measure the purity of liquid samples by detecting variations in the velocity of sound. Uses a phase shift detection technique that incorporates the use of logic gates and a piezoelectric transducer. (JRH)
Descriptors: Foreign Countries, Higher Education, Physics, Science Experiments
