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Q.

Is it true that sound can travel in a vacuum?


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a

True

b

False 

answer is B.

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Detailed Solution

 The above statement is false.
Sound waves cannot travel in a vacuum. This is because sound waves are mechanical waves and mechanical waves need a medium to travel, for example, air and water. Sound in physics is defined as “a vibration that propagates as an audible wave of pressure, through a medium such as a gas, liquid or solid.” Thus, it is a false statement that sound can travel in a vacuum.
The correct statement would be sound waves cannot travel in a vacuum.
 
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