4 years ago

Why do objects appear darker when wet

1 answer:

4 0

It is a matter of how your eyes percive light and how some wet objects refract light differently then their dry counter parts In reality wet objects are not really darker then dry objects that just how the human eye sees it.

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The cylindrical tub of a dryer in a laundromat rotates counterclockwise about a horizontal axis at 41.5 rev/min as it dries the

frozen [14]

Answer:

$\theta = 49.81^0$

Explanation:

Given that:

$\omega = 41.5 \ rev/min\\\\\omega = 41.5 *\frac{1}{60}* 2 \pi\\\\\omega = 4.45 \ rad/s\\\\\\diameter = 0.748 m$

If we let the piece of the close lose contact at ∠θ;

Then ; from force balance;

we have:

$\\\\mg sin \theta = \frac{mv^2}{r}\\\\sin \theta = \frac{2v^2}{dg}\\\\\theta = sin^{-1} (\frac{2v^2}{dg})$

where;

$v = \frac{\omega d}{2}\\\\v = \frac{4.45 *0.748}{2}\\\\v = 1.6643\\\\v^2 = 2.77$

Again:

$\theta = sin^{-1}(\frac{2v^2}{dg})\\\\\theta = sin^{-1}( \frac{2*2.77}{0.74*9.8})\\\\\theta = 49.81^0$

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3 years ago

Que fracción de luz que llega directa a una lamina de vidrio se refleja en la primera superficie?

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Answer:

unos 40 o30 pienso

Explanation:

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3 years ago

During which segments are two states of matter present?

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Answer:

the correct answer is D.) 2,4

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4 years ago

According to the big-bang theory how the universe might end?

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Answer:

<em>If the Universe holds enough matter, including dark matter, the combined gravitational attraction of everything will gradually halt this expansion and precipitate the ultimate collapse. Over time, galaxies, then individual stars, will smash into each other more frequently, killing off any life on nearby planets.</em>

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3 years ago

What is the weight of a<br> 63.7 kg person?

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Answer:

A person that weighs 63.7 kg weighs 63.7 kg

Explanation:

Too complicated to explain.

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3 years ago

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