2.1 List of Laboratory Equipment Digital Caliper Ruler Micrometer Digital Balance 2.2 Introduction Irregularly Shaped Cylinder Strip of Metal Consider an object constructed out of a specific material. The density of the material is defined as the ratio of the mass (m) of the object to the volume (V) of the object. P: m V (2.1) cm 3 kg where p is the density in units of m or k. Density is characteristic of the substance. By determining the density of an object constructed totally out of a metal for example, one may deduce the material out of which the substance is made. Some selected densities are listed in Table 2.2-1. Density of Substances Density Material Material (g/cm) Density (g/cm) Aluminum 2.80.1 Nickel 8.80.05 Brass 8.50.05 Silver 10.50.05 Copper 8.90.05 Tin 7.20.05 Gold 19.30.05 Uranium 18.70.1 Iron 7.90.05 Zinc 7.10.06 Lead 11.30.05 Table 2.2-1: Densities of various substances. In this laboratory you will determine the density of a rectangular strip and of a cylinder. To do this you must measure the mass and the dimensions of the object. The volume of the strip is just: V =LxWxH strip where L, W, and H are the length, width, and height of the strip respectively. The volume of a cylinder is: V cylinder = Dh 4 (2.2) (2.3)