What must astronauts use microphones and headphones in outer space

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Liv sheldon given the balanced equation for an organic reaction: c2h2 + 2cl2 → c2h2cl4 this reaction is best classified as *

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied