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adell [148]
2 years ago
5

How many meters across is a road sign that has an angular size of 120 arcseconds and is 1 km away?

Physics
1 answer:
myrzilka [38]2 years ago
8 0
That’s the one I’m struggling withhhh aswellll
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A tungsten wire has resistance R at 20°C. A second tungsten wire at 20°C has twice the length and half the cross-sectional area
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The resistance is 4 times the resistance of the first wire. the formula is R = p*l/A with p being resistivity, l length and A area. So if you double length and half area, which botv result in more resistance, you get p*2/0.5 or 4 (p can be abandoned because it is the same. We take standard length and area as 1)
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How is the pressure exerted and the area on which it is exerted are related to each other?
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5 0
2 years ago
Which sentence from the article supports the idea that the visible spectrum is more limited in marine animals than humans? A Mos
lidiya [134]

Most marine bioluminescence is blue-green, which is easier to see in the deep ocean

Explanation:

As per science,  Emission and production of light by a living organism is defined as Bioluminescence. Bioluminescence occurs widely in marine animals whereas it is triggered by a physical disturbance is seen by humans, such as a moving boat hull or waves.

Throughout the water column bioluminescent organisms live and bioluminescence is extremely common in deep sea which shows that visible spectrum is more limited to marine animals than humans.

8 0
3 years ago
IF YOU GOOD AT SCIENCE PLEASE ANSWER THIS ASAP
xz_007 [3.2K]

Answer:

I would believe that it would be the last option

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Physical science is a type of science that mainly focuses on natural objects that are not alive, such as minerals and rocks.

4 0
2 years ago
Read 2 more answers
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