Recent content by pincopallino

I would like, but I do not have. there must be some trick. isn't there on line in the WEB any free circuit resolutor?

it is a question from our teacher. it is evident that using standard method of resolution (kirchoff or whatever) is absurd, as it would get to a big linear sistem of equations. for three is easy Req=2/3R. for four, it' s eay as well, as for symmetry reason the free twi point are at hte same...

in attachment a diagram for 5 points.

1. let's have 2011 point each pair connected by a resitor R. what is the equivalent resistor between each pair of points conneced by R? 2. due to the symmetry the equivalent resistor between two arbitrary point connected by R is always the same. let's take two of this contigouspoins. the...

I have not made this assumption.. R is the radius of the Earth in the formula. no Sun radius in there... I have just assumed that, as the Earth-Sun distance is 1.5exp11meters, the sun rays arrives in the Earth parallel (whish is true if we consider our shadows under the sun!...):cool:

the radius is irrelevant, as you may notice that it simplifies n the last formula I have written

[b]1. We all know that the solar constant is 1350Watt.m^-2, which is related to a unit surface perpendicular to the solar rays. The question is: which is the average solar intensity on the Earth surface? [b]2. first, the portion of the EArth surface is half the EArth sphere. second, we...