Waec 2024 Physics Question 1

(i) Suspend the mass, m=20 g on the spring balance and measure the weight in air, W_{A} in Newton. (ii) Immerse the suspended mass completely in water and measure weight in water, W_{W} in Newton. Evaluate U_{1}=W_{A}-W_{W}. (iii) Immerse the suspended mass completely in the liquid L of the same volume with water and measure the weight in liquid W_{L}. Evaluate U_{2}=W_{A}-W_{L}. (iv) Repeat the procedure for m=40 g, 60g, 80g, and 100g respectively. In each case, evaluate W_{A}, W_{W}, U_{1}, W_{L}, U_{2}. (v) Tabulate the readings. (vi) Plot a graph of U_{1} on the vertical axis and U_{2} on the horizontal axis starting both axes from the origin (0,0). (vii) Determine the slope s of the graph. (viii) Evaluate K=\frac{1}{s}. (ix) State two precautions taken to ensure accurate results.

(i) State the Archimede's Principle. (ii) State two differences between density and relative density.