Chemistry

Chemistry, 03.07.2019 00:30, ColungaRosemary

What causes the sun rays to strike earth's surface at different angles? !

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Physics, 31.07.2019 20:30, ttandkk

The sun's rays strike earth's surface most directly at the poles. near the equator the sun's rays strike the surface less directly. true or false

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Physics, 02.08.2019 04:50, zianebonankenotdbev

We know that the earth's axis is tilted 23 ½ degrees. on or about june 21 or 22 each year, the summer solstice occurs for those of us who live in the northern hemisphere. on this particular day, the sun's rays are striking earth directly, or at 90 degrees, at a latitude approximately 23 ½ degrees north of the equator. if you were at 23 1/2 degrees north latitude on that day, and you looked up at noon, the sun would be directly overhead. imagine you have taken a flight north to new york city. describe the sun rays at exactly noon on the same day of the year. a) the sun's rays would also be directly overhead. the sun's rays strike earth at 90 degrees throughout the hemisphere. b) the sun's rays would also be directly overhead but only for one hour, twelve noon until one o'clock. after that the earth's movement distorts the angle of the sun's rays. c) the sun's rays will be directly overhead in the northern hemisphere during the fall equinox. the movement of earth changes the angle of incidence of the sun's rays throughout the year. d) the sun's rays will never be directly overhead. the latitude of 23 ½ degrees north is known as the tropic of cancer. above this imaginary line the sun's rays hit earth with decreased angles.

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Geography, 25.09.2019 03:30, ashleyallred3299

The sun is so distant from us that all the light rays that strike our planet approach us along essentially parallel lines. to see why, look at figure 2.10. take a source of light near earth-say, at position a. its rays strike different parts of earth along diverging paths. from a light source at b, or at c (which is still farther away), the angle between rays that strike opposite parts of earth is smaller. the more distant the source, the smaller the angle between the rays. for a source infinitely distant, the rays travel along parallel lines. to sun a b earth to sun figure 2.10 light rays from space. the more distant an object, the more nearly parallel the rays of light coming from it. we saw in class thursday that the size of my finger's shadow on the sidewalk cast by the sun, did not change as my finger was moved closer and farther from the sidewalk. the shadow got "fuzzier" (for a reason we'll discuss in connection with eclipses later in the semester), but not noticeably bigger. repeat these observations yourself: distance finger width of shadow (include half of fuzz) to sidewalk 5 cm 10 cm 20 cm this is the case of the blue lines in fig. 2.10. turn the arrows around so the arrows represent rays of light from the sun that just graze the edge of the earth (re-label "earth" as "finger" in the picture). the finger will then cast a shadow off to the left (out of frame in fig. 2.10)

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Biology, 22.10.2019 01:20, yennie123

The angle at which the sun rays strike the surface of the earth is called what

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