TG DSC Secondary Grade Teacher Model Test 2

Section: Mathematics
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Question : 95 of 160
 
Marks: +1, -0
With reference to the Sound Wave application, consider the following statements:
a. Sonar is a technique often used on boats to locate fish and measure depth.
b. Ultra Sound can not be used as a cleaner.
c. Sonochemistry is a research area regarding the use of ultrasound to create chemical reactions.
Which of the above statement is/are correct?
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