What do two or more elements combine to from?

a compound

an element

a substance

a solution

Which is not one of the major climate zones? question 3 options: rain forest polar tropical temperate

When you turn on a battery-operated device, an electrical circuit is

An initially unpolarized light if intensity 500 w/m^2 passes through four polarizers. the transmission axis between adjacent polarizers is 45∘. what percentage of the initial intensity is transmitted by the system?