12 electrons are attracted to the nucleus because they have a and protons have a charge. list the four elements that make up almost everything that lives. do both questions !

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

Convection occurs when thermal energy is transferred by the movement of

What are two examples of phase changes that skip a phase during transition?