The coefficients in a balanced chemical equation always can express the ratio of a. moles of reactants and products b. volume of reactants and products c. atoms and reactants and products d. mass of reactants and products

Ablock of mass 1.5 kg slides down an inclined plane that has an angle of 15. if the inclined plane has no friction and the block starts at a height of 3 m, how much kinetic energy does the block have when it reaches the bottom? acceleration due to gravity is g = 9.8 m/s2. a. 6.8 j b. 50.9 j c. 0 j d. 44.1 j

If steel is more dense that lake water, why can a boat float

Carbon 14 is a naturally occurring stable