Interesting Definition and 754 Threads

This product is designed to absorb CO2 from the environment. I just saw a report on The Science Channel. It seems that this idea has been well received by some scientists. http://www.eco-cement.com/

http://www.geocities.com/bridgestein/Bffield.jpg (copy and paste the above address to your browser please) In fact I know the answers of this problem, but I have a question. Here's the question. A charge +q moving with constant velocity v enters into a uniform magnetic field region as...

Interesting Quantum Mechanics Problem Suppose we have a particle in a box with infinite potential for x>a and x<0 and zero potential in between.Then by solving the schrd. equation we get a node at x= a/2 for first excited state.Which means the probability of finding the particle at x=a/2 is...

interesting inequality involving sums Which is the smallest n-natural number- for this inecuation: &#8721k=2n {1/[k * ln(k)]} &#8805 20 Any ideas?