View Question
 Question
 Subject: Sun's Energy Category: Science > Earth Sciences Asked by: mattchapman-ga List Price: \$2.00 Posted: 04 Sep 2006 16:24 PDT Expires: 04 Oct 2006 16:24 PDT Question ID: 762212
 ```The Sun's total energy output that reaches the Earths surfce is: a) 5% b)0.5% c)0.05% d)0.005% e)0.0005%```
 There is no answer at this time.

 ```This can be closely estimated by treating Earth's orbit with the Sun as an ideal circle. It is sufficiently close to a circle to be a useful approximation. The use your search engine to retrieve the following: [1]- Earth's distance from the Sun, [2]- the mensuration formula for calculatng the surface area of a sphere, given the sphere's radius, [3]- Earth's diameter, [4]- the mensuration formula for the area of a circle. Earth's orbital radius is the radius of a very large sphere centered upon the Sun. Compute the area of that sphere. Earth's cross-sectional area is given by plugging its diameter into the formula for the area of a circle. Compute this cross-sectional area. Now, divide Earth's cross-sectional area by the area of the giant SDun-centered sphere. This will yield the fraction of the Sun's output which falls on Earth. This information is sufficient to guide you to a useful answer. Other than that, no one is here to spoon-feed you the answers to your homework.```
 ```This looks like the right way to get the answer. I didn't check the math. http://www.madsci.org/posts/archives/May2003/1051835154.Es.r.html```
 ```the suns enegry that reaches the earht surface is 0.0005% of the total energy that is dissipated by sun. for the caliulation of ths we have to know the radius of earth,sun. the entire sun's energy that reaches the earth is also not observed by the earth. the earths stratosphere acts as a shield and mostly reples the solar enegy of which is comic rays.the ozone layer is the best thing that mostly reples the suns energy that reaches the earth. if its not there then we will not have been orginated now.```