A charge Q is placed at each of two opposite corners of a square of length a. A charge q is placed each of the other two corners. Of the resultant electric force on the two charges Q is zero, what is the mathematical relationship between Q and q

How does the entropy of steam compare to the entropy of ice?

Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this