GESS 4NA ScPh Prelim P1 22

This paper consists of 9 pages including the cover page GAN ENG SENG SCHOOL Preliminary Examination 2022 CANDIDATE NAME CLASS INDEX NUMBER SCIENCE (PHYSICS) Paper 1 Multiple Choice Sec 4 Normal (Academic) 5105/01 19 Aug 2022 Papers 1 & 2: 1 hour 15 minutes Additional Materials: OTAS Calculators are allowed in the examination READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the OTAS. There are twenty questions in this paper. Answer all questions. For each question there are four possible answers A, B, C, and D. Choose the one you consider correct and record your choice in soft pencil on the separate OTAS. Read the instructions on the OTAS very carefully. Answers to Paper 1 and 2 must be handed in separately. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. You are advised to spend no more than 30 minutes on Paper 1. You may proceed to answer Paper 2 as soon as you have completed Paper 1. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. Total Marks 20

GESS 4NA ScPh P1 Prelim 22 TYL (LTW) 2 1 A stopwatch is used to measure the time taken for 50 oscillations of a pendulum. The diagrams show the stopwatch at the start and at the end of the 50 oscillations. What is the period of the pendulum? A 2.28 s B 3.88 s C 4.52 s D 6.80 s 2 The distance-time graph shows Caleb moving near his home while doing the GESS half-marathon challenge. In which section is Caleb moving towards his home at constant speed? 3 Horizontal forces can act on a moving car. In which situation are the forces balanced? A The car accelerates in a straight line. B The car changes direction at constant speed. C The car slows down and finally stops. D The car travels at constant speed in a straight line. distance from home

GESS 4NA ScPh P1 Prelim 22 TYL (LTW) 3 4 The diagram shows four cubes A, B, C and D placed in a beaker of an unknown liquid. Which cube has the same density as the unknown liquid? 5 A uniform beam is p ivoted at its centre of gra vity and balanced by suspending a 5 N weight from one side and two 3 N weights from the other side. The diagram shows the left-hand side of the beam. Which diagram shows the right-hand side of the beam when the beam is balanced? A B C D 30 cm 30 cm 30 cm 30 cm 40 cm 20 cm 10 cm 15 cm 15 cm

GESS 4NA ScPh P1 Prelim 22 TYL (LTW) 4 6 Which surface will allow a knife to cut meat more easily, and what is the corresponding reason? surface reason A B C D wide wide narrow narrow greater pressure on the meat less pressure on the meat greater pressure on the meat less pressure on the meat 7 Hazel drops a pebble of mass 0.1 kg from a height of 8 m. The gravitational potential energy (Ep) and kinetic energy (Ek) of the pebble vary at different heights. Some heights and energy values are shown in the table. height of pebble above Ecopond / m Ek / J Ep / J total energy / J 0.0 8 0 8 2.0 2 6 8 4.0 – – 8 6.0 6 2 8 8.0 0 8 8 Which statement is correct for the 4.0 m reading? A Ek > Ep B Ek < Ep C Ek = Ep D Ek – Ep = 8 8 Xing Hui has three sealed plastic bags. One bag is full of gas, one of liquid and one o f solid. She squeezes each bag to see if it changes shape, and warms each bag to see if it expands. Which bag contains gas? A The one that changes shape easily and expands the least when heated. B The one that changes shape easily and expands. C The one that is fixed in shape and expands the least when heated. D The one that is fixed in shape and expands the most when heated.

GESS 4NA ScPh P1 Prelim 22 TYL (LTW) 5 9 The diagram shows four rods (A, B, C and D) each made of a different metal. One end of each rod is in contact with bo iling water and the other reaches the steady temperature shown. The table shows the resistivities of these four rods (not in order). Which rod shows the correct resistivity according to the steady temperature? resistivity /  m A B C D 9.8 × 10-8 5.3 × 10-8 2.8 × 10-8 1.5 × 10-8 10 The bar graph shows the temperature at which some substances change state. Which substance freezes at 800 C? A carbon dioxide B ethanol C sodium chloride D water steady temperature at end of rod 60 C 20 C 40 C 80 C boiling water at 100 C A B C D

GESS 4NA ScPh P1 Prelim 22 TYL (LTW) 6 11 The diagrams show different views of a water wave in a ripple tank. Which letters represent an amplitude and a wavelength? Amplitude wavelength A B C D S Q S Q P S R R 12 A spring can be used to show a longitudinal wave and a transverse wave. Which row represents the motion of the spring and type of wave for P and Q? motion of particles at type of wave for P Q P Q A B C D ↕  ↕   ↕  ↕ transverse transverse longitudinal longitudinal longitudinal longitudinal transverse transverse

GESS 4NA ScPh P1 Prelim 22 TYL (LTW) 7 13 The diagram represents the electromagnetic spectrum. gamma rays X ultraviolet light infrared Y radio waves Which row correctly shows the application of waves X and Y? X Y A B C D checking welds checking welds sunbeds sunbeds intruder alarm satellite communication intruder alarm satellite communication 14 Statements about the common properties of all electromagnetic waves are shown. (I) They transfer energy from one place to another. (II) They are longitudinal waves. (III) They can travel through vacuum. (IV) They travel through vacuum at the speed of 330 m/s. (V) They all show wave properties like reflection and refraction. How many of these statements are incorrect? A 1 B 2 C 3 D 4

GESS 4NA ScPh P1 Prelim 22 TYL (LTW) 8 15 A fishing boat sends out a pulse of sound waves towards the sea bed and picks up two echoes, a faint one follow ed by a strong one. The echoes are heard 0.5 s a nd 0.7 s after the pulse is emitted. The velocity of sound in seawater is 1 500 m/s. How far below the boat is the shoal of fish? A 375 m B 525 m C 750 m D 1 050 m 16 An ambulance siren emits two different sounds P and Q. These are produced alternately. The diagram represents the sounds emitted. Which sound is softer and which has a higher pitch? softer higher pitch A B C D P P Q Q P Q P Q

GESS 4NA ScPh P1 Prelim 22 TYL (LTW) 9 17 When a current of 0.54 A flows through a lamp for 1 m inute, 97.2 J of electrical energy is converted to light energy. What is the potential difference across the lamp? A 0.87 V B 3.0 V C 32 V D 52 V 18 Three 240 V lamps, of different power ratings are connected as shown. What is the effective resistance of the circuit? A 50  B 208  C 288  D 465  19 The electric ta riff is 32. 28 cents per kWh from 1 July to 30 Sep tember 2022 in Singapore. How much doe s it cost if Emmanuel uses the 240 V, 1 kW air-conditioner for 6 hours every night in the month of July so that he can sleep well? A $14.41 B $58.10 C $60.04 D $250.17 20 Which electrical appliance is either not safe to use or is unable to work? A 2-pin plug hair dryer with double insulation B 240 V, 200 W toaster with 3 A fuse C 3-pin plug electric iron with no double insulation D 240 V, 1 kW air-conditioner with 3 A fuse END OF