Discover Questions

A square has sides with length Is a photon an electromagnetic wave and how does it compare to a gravity wave? How can something be finite and by the same token have no boundary which means infite? Calculate the mole fraction of water in a mixture of 12g of water, 108g of acetic acid and 92g of ethyl alcohol? How to expect the range of following without graphing :
Sqrt(1-x^2)?