Girlll, email that teacher, what crack she on???
Answer:
Explanation:
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Answer:
Statement that is true about electromagnetic and mechanical waves is:
Option B: Mechanical waves must travel through a medium, but electromagnetic waves do not require a medium to travel.
Explanation:
'Electromagnetic' waves do not need any medium to travel whereas 'mechanical waves' need a medium or matter for transmission. Electromagnetic waves are produced by the 'vibrations' of the charged particles. They can even travel in vacuum.
On the contrary, mechanical waves are caused by the 'wave amplitude'. Mechanical wave can travel in solid, liquid and gas and are considered to be periodic disturbance.
Thus, Option B is the most statement apt explaining the difference between electromagnetic and mechanical waves.
Answer:
I A
Explanation:
Vibration can simply be explained as the the action of moving back and forth quickly and steadily. And , It should be understood that sound wave is produced when an object vibrates.
It should be noted also that sound waves travel through solid, liquid and air or gas.
Therefore, it means that sound waves are not created by vibration but created or produced only when something is caused to vibrates.