Beatty 2026 Physics P3 QP

BEATTY SECONDARY SCHOOL PRELIMINARY EXAMINATION 2026 SECONDARY FOUR EXPRESS / G3 CANDIDATE NAME CLASS REGISTER NUMBER PHYSICS 6091/03 Paper 3 Practical Test 12 August 2026 1 hour 50 minutes Candidates answer on the Question Paper. Additional Materials: As listed in the Confidential Instructions READ THESE INSTRUCTIONS FIRST Write your name, class and register number on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Answer all questions. All of your answers should be written in this Question Paper: scrap paper must not be used. Graph paper is provided in this Question Paper. Additional sheets of graph paper should be used only if it is necessary to do so. You will be allowed to work with the apparatus for a maximum of 55 minutes for each section. You are expected to record all your observations as soon as they are made. An account of the method of carrying out the experiments is not required. For Examiner’s Use 1 10 2 10 3 20 Total 40 The use of an approved scientific calculator is expected, where appropriate. 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. This document consists of 12 printed pages. [Turn over

2 Section A 1 In this experiment, you will investigate how the volume of water affects the rate at which water in a beaker cools. You are provided with: • a retort stand with boss and clamp, • a thermometer, • a 250 cm3 beaker, • a thermal flask containing hot water, • a stopwatch, • a styrofoam cup, • a piece of cloth. Fig. 1.1 (a) Set up the apparatus as shown on Fig. 1.1. Clamp the thermometer such that it is near the bench top. Take note that the thermometer should not be clamped too tightly to prevent breakage. The thermometer must remain in the clamp throughout the experiment. (b) Pour approximately 200 cm3 of hot water into the beaker and place the thermometer in the water. When the temperature of the hot water stops increasing, this is the highest temperature TH obtained by the hot water. Record the highest temperature of the hot water , TH, and start the stopwatch immediately. TH = ……………………… [1] (c) Record the temperature T of the water every 30 s until t = 180 s in Table 1.1. Include in the same table, the reading in (b) at t = 0 s. After 180 s, carefully pour the hot water into the sink, using the cloth to hold the beaker. thermometer clamp beaker bench

3 Table 1.1 beaker with 200 cm3 of water beaker with 100 cm3 of water t / s T / °C T / °C [2] (d) Repeat (b) and (c) using 100 cm3 of hot water in the beaker. Record the temperature readings in Table 1.1. [1] (e) By referring to your results, explain the effect of volume of water in the beaker on the rate of cooling of the water. ………………………………………………………………………………………………. ………………………………………………………………………………………………. …………………………………………………………………………………………… [2] (f) (i) Using your results for 100 cm3 of water, calculate the average rate of cooling r1 for the first 90 s of the experiment using the formula, r1= T0 - T90 t where T0 and T90 are the temperatures of water at 0 s and 90 s respectively , and t = 90 s. Include the unit for the rate of cooling. r1 = ………………………..……….. [1]

4 (ii) Using your results for 100 cm3 of water, calculate the average rate of cooling r2 for the last 90 s of the experiment using the formula, r2= T90 - T180 t where T90 and T180 are the temperatures of water at 90 s and 180 s respectively, and t = 90 s. r2 = ………………………..……….. [1] (g) A student suggests that the two different volumes of water should have the same starting temperatures. State whether your values for r1 and r2 support this suggestion. Justify your answer with reference to your results in (f). ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. …………………………………………………………………………………………… [2] [Total: 10]

5 2 In this experiment you will investigate the oscillation of a wire triangle. You are provided with • a retort stand, clamp and boss • one piece of wire • a cork with a pin • a stopwatch • a half-metre rule • one piece of blu-tack (a) Bend the wire to form the shape of a triangle, as shown on Fig. 2.1. Use a piece of blu-tack to ensure that the ends of the wire meet at one corner of the triangle. The bottom of the triangle should have a length L of 20.0 cm. Fig. 2.1 (i) Describe the steps taken to ensure a triangle with L = 20.0 cm is formed. ………………………………………………………………………………………… ………………………………………………………………………………………… ………………………………………………………………………………………… …………………………………………………………………………..………… [1] (ii) Measure and record the length L. L = ………………… [1] wire ends of the wire blu-tack L

6 (iii) Position the pin in the cork and clamp the cork. Hang the triangle-shaped wire from the pin as shown on Fig. 2.2. Fig. 2.2 (iv) Gently displace the triangle-shaped wire and release it so that it oscillates sideways as shown on Fig. 2.2. (v) Determine an accurate value for the period T of the oscillations. T = …………………… [1] (vi) Calculate T2. T2 = ………………….... [1] (b) A student claims that T2 is directly proportional to L. Using the same apparatus as in Fig. 2.2, plan an experiment to find out if the student is right. Your plan should include • the quantities that you should keep constant, • a detailed description of how you will perform the experiment, • a suitable table, with column headings, to display your measurements and calculated values. (You do not need to enter any data into the table), • a statement of the graph that you would plot to test the relationship, • a sketch of the graph that you would obtain if the suggested relationship is correct. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ends of the wire wire cork with a pin retort stand blu-tack

7 ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………………. ………………………………………………………………………………………… [6] [Total: 10]

8 Section B 3 In this experiment you will investigate the resistance of a salt solution. You are provided with: • a power supply (three dry ce