yes this is possible. GPS can receive information of its location from satellites. In your case your friend should have a GPS. For you to know this information has to...

GPS Device receives signals, time and location information from satellites. It requires atleast 3 satellite for 3D location and 2 satellites for 2D location (i.e. on ground). We have GPS...

Yes obviously. Think like this, we use a computer with a 32 bit processor but we are able to do very huge calculations. Its just about the steps. But then...