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Kruka [31]
3 years ago
6

Cheryl has a mug that she says is made up of matter. Heather says that the hot chocolate inside the cup is made up of matter, to

o. Keaton says that the steam coming from the cup is also made up of matter. Mikayla says that none of it is matter because matter is too small to see. Which best describes who is correct?
Physics
1 answer:
Lostsunrise [7]3 years ago
3 0

They are all correct. All of the substances referred to are indeed matter and matter is too small to be seen by eye. But when it stacks up together, then it becomes visible. Million and millions of small particles form up and form the visible matter.

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For wave 1:

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For wave 2:

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Where A= amplitude=y_m

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k=\frac{2\pi}{\lambda} , \lambda= wave length.

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The resultant wave will be

y = y₁ + y₂

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 =y_m {sin (kx-ωt) + sin (kx-ωt+Φ)}

 =y_m\  sin(\frac{kx-\omega t +\phi + kx-\omega t }2)\ cos(\frac{kx-\omega t  +\phi -kx+\omega t}2)

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=y_m\ cos(\frac{\phi }2) sin({kx-\omega t +\frac\phi 2)

Therefore the amplitude of the resultant wave is

=y_m\ cos(\frac{\phi }2)

=y_m\ cos(\frac{\pi }{10})

=0.95 y_m

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