NYGH-2012-S3-EOY-P2

Class Register Number Name 南洋女子中学校 NANYANG GIRLS’ HIGH SCHOOL End-of-Year Examination 2012 Secondary Three PHYSICS 1 hour 45 minutes Paper 2 Theory Paper 10:00 – 11:45 Monday 15 October 2012 Additional materials: Calculators may be used READ THESE INSTRUCTIONS FIRST Do not open this booklet until you are told to do so. Write your name, register number and class in the spaces at the top of this page and on any separate answer paper used. Section A (40 marks) Answer all questions. Write your answers in the spaces provided on the question paper. Section B (30 marks) Answer all questions including questions 7, 8 and 9 Either or 9 Or. Write your answers in the spaces provided on the question paper. At the end of the examination, circle 9 Either or 9 Or in the grid on the right to indicate which question you have answered. INFORMATION FOR CANDIDATES The intended number of marks is given in the brackets [ ] at the end of each question or part question. You are advised to spend no longer than one hour on Section A and no longer than 45 minutes on Section B. Take the acceleration due to gravity, g, to be 10 m s-² or 10 N kg-1. Examiner’s Use Section A 1 2 3 4 5 6 Section B 7 8 9 Either 9 Or Total 70 Setters: TW, CMH & BN This document consists of 16 printed pages. NANYANG GIRLS’ HIGH SCHOOL [Turn over

2012 End-of-Year Examination Secondary Three 2 Nanyang Girls’ High School Setters: TW, CMH & BN Physics II Section A Answer all questions. Write your answers in the spaces provided. 1 Three students set out to determine the average diameter of a marble using different methods. Method 1 Student A uses a micrometer screw gauge to measure the widest part of the marble. The reading is 10.92 mm. Method 2 Student B uses a pair of vernier callipers to measure widest part across 3 mutually perpendicular axis of one marble. The average of the 3 readings is 10.1 mm. . Method 3 Student C uses a ruler to measure the total length of 10 similar marbles arranged in a straight line. The total length is 10.1 cm and the average is 10.1 mm. (a) State one advantage of Method 1 over Methods 2 and 3. …………………………………………………………………………………………… ……………………………………………………………………………………….. [1] (b) Explain whether Method 2 or Method 3 is a more accurate method for determining the average diameter of the marble. …………………………………………………………………………………………… …………………………………………………………………………………………… …………………………………………………………………………………………… ……………………………………………………………………………………….. [2] (c) The mass of the ten marbles used in Method 3 is weighed and their volume is measured. The following results are recorded. Mass = 17.7 g Volume = 6.9 cm 3 (i) Calculate the average weight of 1 marble. Weight = ……………………….. [1] metre rule

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