What pressure expressed in pascals equals 70 n/m2? 70 pa 7000 pa 700 pa 7 pa

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?

Ahypothesis is? close agreement by competent observers of observations of the same phenomena. a guess that has been tested over and over again and always found to be true. an educated guess that has yet to be proven by experiment. the long side of a right triangle. a synthesis of a large collection of information that includes guesses.

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body