2023 AHS Physics Prelim Paper 3

14 August 2023 1 hour 50 minutes Anglican High School Secondary Four Preliminary Examination 2023 CLASS CLASS INDEX 4 Anglican High School 2023_S4_Prelim_PHY_P3 [Turn over S4 This document consists of 12 printed pages.

1 In this experiment, you will investigate the mass and volume of a brass mass. You are provided with: • a brass mass • a ruler • two set squares • an electronic balance (a) (i) Describe one precaution you must take before measuring the mass of the brass mass using an electronic balance. …………………………………………………………………………………………………………. ……………………………………………………………………………………………………… [1] (ii) Measure and record the mass of the brass mass. mass = ……………………………. [1] (b) (i) Draw a labelled diagram to show how to use the ruler and the set squares to measure the diameter of the brass mass. [2] (ii) Measure and record the diameter d of the brass mass. d = ……………….………. [1] 2 Section A Anglican High School 2023_S4_Prelim_PHY_P3

(c) (i) Measure and record the total length l of the brass mass, as shown in Fig. 1.1. Fig. 1.1 (not to scale) l = ………………………….. [1] (ii) Estimate the volume V of the brass mass using the equation 𝑉 = 𝜋 4 𝑙𝑑2 V = ……………………….… [1] (iii) The volume calculated in (c)(ii) is an estimate of the volume of the brass mass. Explain why it is only an estimate and whether it is a good or poor estimate of the actual volume of the brass mass. …………………………………………………………………………………………………….…. ………………………………………………………………………………………….……………. ………………………………………………………………………………….………………... [2] (iv) Describe how the method for determining the volume of the brass mass may be improved. …………………………………………………………………………………………………….…. ………………………………………………………………………………………….……………. ………………………………………………………………………………….………………... [1] [Total: 10] 3 Anglican High School 2023_S4_Prelim_PHY_P3 [Turn over l

2 In this experiment, you will investigate the deviation of a ray of light passing through a glass block. You are provided with • a rectangular block • an illuminated slit • a 30 cm ruler • a protractor (a) Fig. 2.2 is on page 5 of your question paper. On Fig. 2.2, (i) draw a normal to the line XY at point M, above and below the line XY, (ii) draw a line from M at an angle of 60o to the normal towards the top left edge of the page. Label this line L. (iii) Extend this line from M to the bottom right edge of the page. Label this line K.