MI 2024 PU3 H2 PHYSICS PRELIM P4 QP

Class Adm No Candidate Name: This document consists of 17 printed pages and 3 blank pages. [Turn over 2024 Preliminary Exams Pre-University 3 H2 PHYSICS 9749 / 04 Paper 4 Practical 26 August Candidates answer on the Question Paper. 2 hours 30 minutes READ THESE INSTRUCTIONS FIRST Write your name, class and admission number in the spaces provided at the top of this page. Write in dark blue or black pen on both sides of the papers. You may use an HB pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, glue or correction fluid. Answer all questions. Write your answers in the spaces provided in this question paper. The use of an approved scientific calculator is expected, where appropriate. You may lose marks if you do not show your working or if you do not use appropriate units. Give details of the practical shift and laboratory where appropriate in the boxes provided. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. Shift Laboratory For Examiner’s Use 1 16 2 8 3 19 4 12 TOTAL / 55 H

2 1 This investigation considers the size of the hole needed in a salt shaker for the salt to flow at a suitable rate. (a) You have been provided with a beaker labelled P containing 100 g of salt as shown in Fig. 1.1. Fig. 1.1 (i) Measure and record the depth x of salt in beaker P using the vernier calipers. x = …………………………………. [1] (ii) State a significant source of error in your value of x. [1] (iii) Estimate the percentage uncertainty in your value of x. percentage uncertainty = …………………………………. [1] (b) You have been provided with two cards. Each card has a hole of a different size. (i) Measure and record the diameter d of the smaller hole. d = …………………………………. [1] (ii) Determine the area A of the smaller hole. A = …………………………………. [1] x beaker salt

3 [Turn over (c) (i) Fill the boiling-tube, as shown in Fig. 1.2, with salt from beaker P. Fig. 1.2 (ii) Cover the open end of the boiling-tube with the card that has the smaller hole. Use tape to attach the card to the boiling-tube. The hole should not be covered by tape. When the boiling -tube is inverted, it should not be possible for salt to leave the boiling-tube other than through the hole. (iii) Cover the hole with your finger. Invert the boiling-tube over the empty beaker Q. Remove your finger and allow the salt to flow through the hole into beaker Q for 50 seconds. It may be necessary to shake the boiling-tube gently to achieve constant flow. (iv) Tap beaker Q gently on the be