How do light waves differ from sound waves?

Physics

2 answers:

Pie1 year ago

6 0

Light waves are electromagnetic. And, sound waves are mechanical.
Hope this helps! :)

insens350 [35]1 year ago

5 0

Answer:

Light waves are electromagnetic waves while sound waves are mechanical waves. :)

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A weightlifter exerts an upward force on a 1000-N barbell and holds it at a height of 1 meter for 2 seconds. Approximately how m

Alex73 [517]

Amount of work done is zero and so power = 0 watts.

<u>Explanation:</u>

Power is the rate at which work is done, or W divided by delta t. Since the barbell is not moving, the weightlifter is not doing work on the barbell.Therefore, if the work done is zero, then the power is also zero.It may seem unusual that the data given in question is versatile i.e. A weightlifter exerts an upward force on a 1000-N barbell and holds it at a height of 1 meter for 2 seconds. But, still the answer is zero watts , this was a tricky question although conceptual basis of question was good! Power is dependent on amount of work done which is further related to displacement and here the net displacement is zero ! Hence, amount of work done is zero and so power = 0 watts.

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3 years ago

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Scilla [17]

Answer:

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