An Underwater Sonar Detects the Echo from an Object at 100m

question 9

Essay

An underwater sonar detects the echo from an object at 100m range.The TOF equals ___ ( x.xxs).

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Definitions:

Defect

An imperfection or shortcoming in a product or system that impairs its usability, safety, or functionality.

Uncertified Check

A check that has not been verified or guaranteed by the bank upon which it is drawn, unlike a certified check.

Cash

Cash is a medium of exchange that represents real value and is used for transactions, available either as physical currency or digital form.

Refuse

To decline to accept or allow something; to show unwillingness to do, accept, give, or allow something.