The is a unit of force. a. pascal b. atmosphere c. newton d. kilopascal

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.

How is the ideal mechanical advantage of a wheel and axle calculated?