A graduated cylinder has a mass of 55g when empty. When 32 mL of water is added, the graduated cylinder has a mass of 122 g. If a rock is added to the graduated cylinder, the water level rises to 75mL and the total mass is now 250g. What is the density of the rock?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d