TJC 2023 H2 Prelim Paper 4

TEMASEK JUNIOR COLLEGE 2023 JC2 PRELIMINARY EXAMINATION Higher 2 NAME CG PHYSICS PAPER 4 Candidates answer on the Question Paper. 9749/04 30 August 2023 2 hours 30 minutes READ THESE INSTRUCTIONS FIRST Write your name and C.G. 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. DO NOT WRITE IN ANY BARCODES. Answer all questions. Write your answers in the spaces provided in this booklet. 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 /12 2 / 9 3 /22 4 /12 TOTAL /55 This booklet consists of 16 printed pages

2 1 In this experiment, you will investigate the motion of a small container in water. (a) You have been provided with two glass marbles and a small container with a separate lid. The dimensions of the glass marbles and the small container are shown in Fig. 1.1. Fig 1.1 (i) Measure and record the diameter d of the marble. d = [1] (ii) Measure and record the height h and the inner diameter D of the small container. h = D = [1] (b) (i) Place the small container in the tray. Fill the small container with water. You may use the beaker to transfer water. (ii) Place one glass marble in the small container. Wait until the water has stopped overflowing. Place the lid on the small container. (iii) The fraction x of glass in the small container is given by where n is the number of marbles in the small container. Calculate x. x = [1]

3 (c) (i) Place the small container containing water and the marble in the cylinder as shown in Fig. 1.2. Fig. 1.2 (ii) Release the small container and measure the time t taken for it to fall to the bottom of the cylinder. t = [1] (iii) Estimate the percentage uncertainty in your value of t. percentage uncertainty = [1] (iv) Justify the number of significant figures that you have given for your value of x. [1]

4 (d) Repeat (b), (c)(i) and (c)(ii) using two marbles. x = [1] t = [1] (e) It is suggested that the relations