GESS 4Exp Phy Prelim P1 24 wo ans

This paper consists of 17 pages including the cover page 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 in the spaces provided unless this has been done for you. There are forty 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. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in this booklet. The use of an approved scientific calculator is expected, where appropriate. Total Marks 40

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 2 1 What is the unit of power expressed in base units? A kg m2 s-2 B kg m2 s-3 C J/s D W 2 What are the orders of magnitude for the diameter of the Earth and for the diameter of an atom? diameter of Earth diameter of atom A B C D 1.3 × 10-6 Gm 1.3 × 10-2 Gm 1.3 × 10-2 Tm 1.3 × 10-6 Tm 1.1 × 10-5 m 1.1 × 10-1 nm 1.1 × 10-5 m 1.1 × 10-1 nm 3 An apple falls from a tree at the top of a tall cliff. As the apple falls, it experiences air resistance. Graphs 1 and 2 are displacement-time graphs. Graphs 3 and 4 are velocity-time graphs. Which graphs describe the motion of the apple? A 1 and 3 B 2 and 3 C 2 and 4 D 1 and 4

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 3 4 A volleyball player throws a ball vertically upwards as he prepares to hit the ball as shown. Air resistance can be ignored. What is the acceleration of the ball just after it leaves his hand and at its highest point? acceleration just after leaving hand acceleration at its highest point A B C D 10 m/s2 downwards 10 m/s2 downwards 10 m/s2 upwards 10 m/s2 upwards 0 10 m/s2 downwards 0 10 m/s2 downwards 5 At lift off, the mass of a Falcon 9 rocket is 549 000 kg. The rocket engine produces a thrust of 7.6 MN. The gravitational field strength g is 10 N/kg. What is the initial acceleration of the rocket? A 13 m/s2 B 3.8 m/s2 C 2.4 m/s2 D 1.4 m/s2 6 A spacecraft travels from the Earth to the Moon. At a certain point in the journey, it has zero weight. Why is the weight zero at this point? A The gravitational fields of the Earth and of the Moon cancel each other. B C The spacecraft stops moving. D There is no air resistance on the spacecraft.

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 4 7 A pentagon card is freely suspended from point P. The weight of the card is 2.0 N and the centre of gravity is at C. The card is displaced to the position shown. What is the moment that will cause the card to swing? A 0.60 N m clockwise B 0.80 N m anticlockwise C 1.0 N m anticlockwise D 1.0 N m clockwise 8 The diagram shows four containers made from thin glass. Which empty container is the least stable? 9 To determine the density of a piece of cork, Farren must find its mass and volume. The mass of the cork is found to be 1.7 g. To determine the volume of cork, he uses a measuring cylinder. As the cork floats, a stone is used to keep it under water. The results of each stage of the experiment are shown. What is the density of the cork? A 0.04 g cm-3 B 0.10 g cm-3 C 0.24 g cm-3 D 0.49 g cm-3

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 5 10 A uniform tube, sealed at one end, is held vertically with the closed end at the bottom. It contains a thread of mercury which traps a column of air. The other end of the tube is open to the atmosphere. When the tube is turned upside down, the volume of the trapped air increases. Which statement explains this? A The air gets hotter when the tube is turned upside down. B The atmosphere pushes less when it acts upwards on the mercury. C The pressure in the trapped air is reduced. D The trapped air molecules hit the mercury harder when travelling downwards. 11 An apartment block receives water from a nearby reservoir. A pump is necessary to lift the water into a storage tank at the top of the building. The gravitational field strength is 10 N/kg. How much energy does the pump supply to lift each kilogramme of water into the tank? A 50 J B 100 J C 400 J D 500 J trapped air in tube trapped air in tube thread of mercury

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 6 12 A train of mass 30 000 kg is moving along a straight track. The speed of the train decreases from 25 m/s to 15 m/s. How much work is done to slow the train down? A 1.5 MJ B 3.4 MJ C 6.0 MJ D 9.4 MJ 13 Which of these statements correctly describes the volume and shape of a solid or liquid at room temperature? A The volume of a solid is fixed but its shape is not fixed. B The volume of a solid is not fixed and its shape is not fixed. C The volume of a liquid is fixed but its shape is not fixed. D The volume of a liquid is not fixed and its shape is not fixed. 14 Gas inside a cylinder is cooled slowly to a lower temperature. The pressure inside the cylinder remains constant as the piston moves inwards. How do the speed of the gas molecules and their rate of collision with the pistons compare with their initial values at the higher temperature? speed of molecules rate of collision A B C D lower lower lower same greater reduced same reduced

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 7 15 Four rods, of all exactly the same size, are each placed with one end in boiling water. The times taken for the temperature of the other end to increase by 1 C are measured. material of rod time for 1 C rise / s Aluminium copper cork styrofoam 5 2.5 400 600 To make a large metal tank with the least heat loss, which materials should be used for the walls of the tank and its insulation? tank insulation A B C D aluminium aluminium copper copper cork styrofoam cork styrofoam 16 The diagram shows a plate-warmer in which candles are used as heaters. The flames of the candles do not touch the underside of the top tray. How does heat pass to the top tray? A mainly radiation and some conduction B mainly convection and some radiation C mainly conduction and some radiation D mainly conduction and some convection

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 8 17 The mass of a metal pan is 1.5 kg. The pan absorbs 6 900 J of heat and this produces a temperature rise of 5.0 C. What is the specific heat capacity of the metal and what is the heat capacity of the pan? specific heat capacity / J kg C-1 heat capacity / J C-1 A B C D 2 070 920 2 070 920 4 600 4 600 1 380 1 380 18 The energy required to change water into water vapour at the same temperature is called latent heat of vaporisation. What does this energy do? A increases the average separation of the water molecules B increases the average speed of the water molecules C increases the temperature of the air near the water D splits the water molecules into their separate atoms 19 The diagram shows a wave on a string with two points P and Q marked. The wave is moving in the direction shown. What will happen next? A P will move to the left. B P will move down. C Q will not move. D Q will move down.

GESS 4EXP PHY P1 Prelim 24 TYL (CHL) 9 20 The diagram shows part of a long stretched spring. A point on the spring moves backwards and forwards between two positions that are 1.2 cm apart. Which row describes the wave? amplitude / cm wavelength / cm A B C D 0.6 0.6 1.2 1.2 10 20 10 20 21 Which set shows the widest range in frequencies among the listed electromagnetic waves? A Infrared radiation, microwaves, ultraviolet radiation and visible light B Infrared radiation, microwaves, radio waves and ultraviolet radiation C Gamma rays, ultraviolet radiation, visible light and X-rays D Gamma rays, microwaves, radio waves and ultraviolet radiation