Question

1. (a) Define density and state its units in the SI system of units. (b) What does a negative zero reading on a Vemier caliper mean? (7pts) 2. (a) Calculate the average value for the following experimentally determined numbers: 2.78, 2.53, 2.36, 2.81, and 2.37. (b) If the standard value is 2.66, what is the percent error in your measurement? All numbers have units of cm. (8pts) 3. A rock is placed in a graduated cylinder containing water, and the cylinder is covered to avoid evaporation. The next moming the water level has dropped by 5.65 ml. No one has had access to the cylinder, and the cylinder has no leaks. What is the most likely explanation for what happened? (5pts)

Answer 1

density is the mass of the substance per unit volume....its SI unit is kg/m3.....