Abook is falling from the top shelf of a bookcase. which statement correctly describes the change in the energy of the book?

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.

Calculate the concentration of all species in a 0.165 m solution of h2co3.

What are the similarities between compounds and mixtures?