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emmainna [20.7K]
3 years ago
7

It was field day at school. The sun was bright and the temperature high. Most of the students wore light colored T-shirts to sta

y cool because dark colors ____________ most wavelengths found in white light.
Chemistry
2 answers:
lesya [120]3 years ago
8 0

Answer:

Absorbs.

Explanation:

Hello,

In this case, we consider that sunlight makes up of a mix of all visible wavelengths of electromagnetic spectrum. It has been substantiated that when all visible wavelengths get into the eye at once, the color white is perceived. However, the absence of any light is related with the black color.

In such a way, black it is said to absorb the radiation while white reflects it, therefore, when the sun is shining, providing high temperatures, it is recommended to wear light colored T-shirts.

Therefore, the answer is:

"It was field day at school. The sun was bright and the temperature high. Most of the students wore light colored T-shirts to stay cool because dark colors absorbs most wavelengths found in white light."

Best regards.

belka [17]3 years ago
5 0
It was field day at school. The sun was bright and the temperature high. Most of the students wore light colored T-shirts to stay cool because dark colors absorb most wavelengths found in white light.
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Alex dragged a log across the yard in 30 the log weighted 400n she did 900 j of work how much power did I she have
In-s [12.5K]

The power used by Alex to drag the log across the yard is determined as 2,656 W.

<h3>Mass of the log</h3>

The mass of the log is calculated as follows;

W = mg

m = W/g

m = (400)/9.8

m = 40.82 kg

<h3>Velocity of the log</h3>

K.E = ¹/₂mv²

v² = 2K.E/m

v² = (2 x 900)/(40.82)

v² = 44.096

v = 6.64 m/s

<h3>Power used by Alex</h3>

P = Fv

P = 400 x 6.64

P = 2,656 W

Learn more about power here: brainly.com/question/13881533

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5 0
2 years ago
A 215-g sample of copper metal at some temperature is added to 26.6 g of water. The initial water temperature is 22.22 oC, and t
andrezito [222]

The initial temperature of the copper metal was 27.38 degrees.

Explanation:

Data given:

mass of the copper metal sample = 215 gram

mass of water = 26.6 grams

Initial temperature of water = 22.22 Degrees

Final temperature of water = 24.44 degrees

Specific heat capacity of water = 0.385 J/g°C

initial temperature of copper material , Ti=?

specific heat capacity of water = 4.186 joule/gram °C

from the principle of:

heat lost = heat gained

heat gained by water is given by:

q water = mcΔT

Putting the values in the equation:

qwater = 26.6 x 4.186 x (2.22)

qwater = 247.19 J

qcopper = 215 x 0.385 x (Ti-24.4)

              = 82.77Ti - 2019.71

Now heat lost by metal = heat gained by water

82.77Ti - 2019.71 = 247.19

Ti = 27.38 degrees

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3 years ago
If 0.50 g of O2(g) reacts with excess H2(g), what is the volume of H2O(g) obtained from the reaction at STP?
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Answer:

0.7 L H2O

Explanation:

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When NaCl dissolves in water
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<h2>♨ANSWER♥</h2>

pl (25*C)

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<u>☆</u><u>.</u><u>.</u><u>.</u><u>hope this helps</u><u>.</u><u>.</u><u>.</u><u>☆</u>

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