Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20050505 11:32:53
Solar Water BoilerHello #2 20050505 15:28:05
Re: Solar Water BoilerThe parabola will focus the rays on to ONE spot (ouch! that'll be hot!) "The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  Leon M. Lederman 