How does the sodium-potassium pump make the interior of the cell negatively charged?

A__ is two or more substances that are together in the same place but are not chemically combined

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n