1. In this experiment you are required to determine the relative density of a solid provided. Proceed as follows: (a) (i) (ii) Measure the mass of the metre rule and record its value. Set up the apparatus as shown in Figure 1. Balance the metre rule on the knife edge, when the solid, M, is suspended in air at a distance, d (cm) from zero end of the rule. y x = 100-y 0 cm O 100 cm d ↑ Centre of gravity, G Metre rule Solid, Mo Knife edge Table top/Bench (b) Figure 1 Measure the distance, y (cm) and x (cm) of the knife edge from each end of the rule; y being the distance from the zero end. Repeat four other values of, d less than 50cm. Tabulate your results. (c) Fill the beaker with water then repeat the procedure in parts (a) and (b) when the solid is completely immersed in water. Tabulate your results. (d) (e) (f) Plot the graphs of x - y against y - d for each set of observations on the same sheet of the graph paper. Find the gradient of each graph. Calculate the: (i) (ii) (g) Mass of the solid. Relative density of the solid. State two sources of errors and its precautions taken in performing this experiment.
