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Nostrana [21]
3 years ago
8

When determining if a change to matter is physical or chemical, you would observe key indicators to use as clues. What is the mo

st correct explanation that a physical change has occurred?
a.fireworks exploding, because energy is released as light and heat
b.gasoline burning, because it forms water vapor and carbon dioxide
c.crushing an ice cube, because the chemical structure of the ice cube is changed
d.dicing potatoes, because the molecules are separated but remain the same substa
Physics
2 answers:
Alex73 [517]3 years ago
6 0
D. A physical change means that the object can be broken into different pieces, but it still remains that same object.
zhannawk [14.2K]3 years ago
4 0

Answer:

D

Explanation:

Even after being cut, the potatoes are still potatoes

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Explanation:

It is given that,

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d\ sin\theta=n\lambda

For third maxima,

\theta=sin^{-1}(\dfrac{n\lambda}{d})

\theta=sin^{-1}(\dfrac{n\lambda}{d})

\theta=sin^{-1}(\dfrac{nc}{fd})  

\theta=sin^{-1}(\dfrac{3\times 3\times 10^8\ m/s}{5\times 10^{14}\ Hz\times 2.2\times 10^{-5}\ m})  

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(b) For second dark fringe, n = 2

d\ sin\theta=(n+1/2)\lambda

\theta=sin^{-1}(\dfrac{5\lambda}{2d})

\theta=sin^{-1}(\dfrac{5c}{2df})

\theta=sin^{-1}(\dfrac{5\times 3\times 10^8}{2\times 2.2\times 10^{-5}\times 5\times 10^{14}})

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2 years ago
HELP PLEASE
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Recall this kinematic equation:

a = \frac{Vi+Vf}{Δt}

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Δt is the amount of elapsed time.


Given values:

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a = \frac{0+25}{10}

<h3>a = 2.5 m/s²</h3>
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