Question

skies having large surface ARe explain​

Answer 1

Explanation:

Skis create a large contact area between the skier and the snow. Therefore, the weight of the skier—or how much gravity pulls on him—is spread out over a larger area. The skier presses less on each square inch of snow, and instead of sinking into it he or she can glide over it.

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Answer 2

The sky is 360 degrees around. But the sky has area! Area is measured in square units, like a floor area is measured in square meters. How many square degrees are there in the sky?

Warning: a small amount of math follows!

Well, we know two things: one is that the the circumference of a circle is 360 degrees, and is defined as 2 x pi x radius (pi is a number that equals about 3.1415) and the other is that the surface area of a sphere is 4 x pi x (radius)^2.

If

  2 x pi x radius=360 degrees

then

 one radius=360 / (2 x pi)=about 57.3 degrees

(57.2958 to be more precise). Simply plug that into the second equation to get

  4 x pi x 57.3^2=41253 square degrees.  

So there you have it! There are over 40 thousand square degrees in the sky. The sky is pretty big. For comparison, the Moon is only a half degree across. That gives it an area of only 0.2 square degrees. The Moon is small!

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