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Maksim231197 [3]
3 years ago
13

How do humans perceive color? A. The optic nerve acts like a prism and separates white light into colors. B. Photoreceptors on t

he retina detect different wavelengths of light. C. The pupil of the eye varies in size to absorb different wavelengths of color. D. The lens of the eye interprets the colors of the visible spectrum.
Physics
1 answer:
hichkok12 [17]3 years ago
8 0
When a human looks at something the wavelengths reflected determine what colour is seen therefore the answer would be:

B
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A hiker, caught in a rainstorm might absorb 1 liter of water in her clothing. if it is windy so that this amount of water is eva
NeTakaya

Water evaporates at 100⁰C

So change in temperature = 100-20 = 80⁰C

Amount of water to be evaporated = 1 liter = 1L*1kg/liter = 1 kg

Specific heat of water is 1 calorie/gram ⁰C = 4.186 joule/gram =4186 J/kg

So heat required E = mcΔT = 1 * 4186 *80= 334880 J =334.88 kJ

So amount of heat require to evaporate water = 334.88 kJ

4 0
3 years ago
What is a galaxy? How many galaxies are there and how many stars does each galaxy hold?
Wittaler [7]
A galaxy is a large system of stars, remnants of dead stars, dust,
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Galaxies come in all sizes.  Tiny shrimp galaxies hold no more than
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8 0
3 years ago
How much energy does a 75-watt light bulb consume while running for 30 minutes<br>​
o-na [289]
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8 0
3 years ago
Two sound waves, from two different sources with the same frequency of 420 Hz travel in the same direction at 336 m/s. The sourc
Tresset [83]

Answer:

Pi(3.14) radians or 180º degrees

Explanation:

First of all, we need to obtain the wavelength of a wave traveling to the speed of sound and 420 Hz of frequency.

The formula is:

l=wavevelocity/frequency

where l = wavelength in meters

With current values:

l = 336 [m/s]/420[1/s] = 0.8 meters

Since a complete cycle (360º or 2pi radians) needs 0.8 meters to complete, 0.4 meters or 40 cm is just half of it, making a 180º degree phase or 3.14 radians.

8 0
3 years ago
Suppose 500 joules of work is done to push an object in 15 seconds. Find the power for this situation
ohaa [14]

Answer:

You have to calculate

Explanation:

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5 0
4 years ago
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