This is used to carry oxygen and nutrients to the cells in the body and carry carbon dioxide and wastes away from the cells.

The density of a substance is 4.0 g/cm3. if a sample of the substance has a volume of 25 cm3 then what is the mass

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d