why is it more difficult to revolve a stone by tieing it in a longer string then by tieing it to a shorter string

If you quadruple the temperature of a black body, by what factor will the total energy radiated per second per square meter increase? 1,024 64 16 4 256 submit answer

Positrons are spontaneously emitted from the nuclei of

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.