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Centre Number
Candidate Number
Name
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level PHYSICS Paper 2 Theory May/June 2005 1 hour 45 minutes
Candidates answer on the Question Paper. Additional Materials: Answer Paper
5054/02
READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Section A Answer all questions. Write your answers in the spaces provided on the Question Paper. Section B Answer any two questions. Write your answers on the separate answer paper provided. At the end of the examination, fasten the separate answer paper securely to the Question Paper. The number of marks is given in brackets [ ] at the end of each question or part question.
For Examiner’s Use Section A If you have been given a label, look at the details. If any details are incorrect or missing, please fill in your correct details in the space given at the top of this page. Stick your personal label here, if provided. Q9 Q10 Q11 Total This document consists of 12 printed pages.
SPA (MML 8112 3/04) S80716/3 © UCLES 2005
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2 Section A Answer all the questions in this section.
For Examiner’s Use
The Term Paper on Answer Question Arc Enemies Battle
Arc The Lad Strategy Guide Characters and Spells: Arc Burn Ground (volcanic eruption on enemies) Total Healing (replenishes HPs) Gail Flash (mystic forces flashes on enemies) Slow Enemy (decreases dexterity of enemies) Meteor Fall (huge meteor clashes on enemies) KukuruCure (replenishes HPs) De poison (cures poison status) Silent (disables enemy's magic use) Refresh (cures status) Ten No Sa baki ( ...
1
Fig. 1.1 represents the motion of Earth and the planet Venus around the Sun. The orbits shown are circles.
not to scale
Sun
orbit of Venus
orbit of Earth Earth Fig. 1.1 (a) On Fig. 1.1, draw an arrow to show the direction of the force exerted by the Sun on the Earth. [1] (b) Information about Earth and Venus is given in the table. planet Venus Earth time for one orbit in (Earth) years 0.7 1.0 radius of orbit / million km 108 150 circumference of orbit / million km 679 942
(i) Use the information in the table to show that Venus has a greater speed than Earth. …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. [2] (ii) As Earth and Venus move in their orbits, the distance between them changes. Calculate the largest possible distance between them.
distance = ……………………………….. million km [1]
© UCLES 2005 5054/02/M/J/05
3 2 Fig. 2.1 shows the lens of a simple camera being used to photograph an object.
For Examiner’s Use
lens object film
camera
Fig. 2.1 The lens forms a focused image of the object on the film. (a) Draw two rays from the top of the object to show how the lens forms the image. [2]
The Research paper on Earth Orbit Moon Space First
When you were a kid did you dream of being an astronaut? Did you what to go to the moon? Like many people this dream was a goal in this research paper I will prove that this dream became a reality to be the best at ones goals and see them through. President Kennedy showed us all he was a hero by getting America to support the American space program, and get three heroes on the moon. On October 4, ...
(b) The object moves closer to the camera. State how the lens is adjusted to keep the image in focus. ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………… [1] (c) Complete Fig. 2.2 to show how white light is split into a spectrum when it passes through a glass prism. [3] prism
white light
Fig. 2.2
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4 3 Fig. 3.1 shows a weather balloon. The balloon is shown partly filled with gas from a cylinder.
For Examiner’s Use
cylinder
balloon
Fig. 3.1 The balloon contains no gas initially. When it is connected to the cylinder, gas enters the balloon. The pressure in the cylinder decreases. (a) Explain why the molecules inside the cylinder (i) exert a large pressure initially, …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………….. [2] (ii) exert a smaller pressure in the cylinder when the balloon is filled.
The Essay on Balloon Powered Car
A balloon-powered car is powered by the air released in the straw. One must blow into the straw which inflates the balloon. When you blow up the balloon, set your racer down, and let it go, escaping air from the balloon rushes out of the straw causing propulsion. The principle at work is Newton’s Third Law of Motion, which states that for every action, there is an equal and opposite ...
…………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. [1] (b) The volume of the cylinder is 0.0020 m3. The pressure inside the cylinder is initially 200 atmospheres. When the cylinder is connected to the balloon, the final pressure in the cylinder and the balloon is 1.0 atmosphere. The temperature of the gas remains constant. Calculate the final volume of gas in the balloon. State the equation that you use.
volume = ……………………….. [3]
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5 4 Fig. 4.1 shows a hydroelectric power station. Water from the lake is used to produce electricity in the turbine house.
For Examiner’s Use
dam
lake
turbine house to river Fig. 4.1 (a) State where the water in Fig. 4.1 has the least potential energy. …………………………………………………………………………………………………………………… [1] (b) In 30 minutes, the water loses 5.0 × 109 J of energy and 4.5 × 109 J of electrical energy is produced in the turbine house. (i) Calculate the efficiency of the energy conversion.
The Term Paper on Nuclear Power The Future OF Energy
Nuclear power, a phrase that isn’t too far from its controversial disputes. nuclear powers debate began around the 1970s to late 1980s when American nuclear power plant in Harrisburg, Pennsylvania had a cooling malfunction that caused a part of one of its reactors partially melt inside the reactor core. Media outlets jumped onto this incident, and dramatizing the events that transpired; not ...
efficiency = …………………….. [1] (ii) Calculate, in watts, the electrical power output from the turbine house.
power = ……………………… W [3] (c) Some power stations burn coal to produce the same electrical power output. State one advantage of the hydroelectric power station. ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………… [1] (d) State one harmful effect that the hydroelectric power station may have on the environment. ………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………… [1]
© UCLES 2005 5054/02/M/J/05
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6 5 Fig. 5.1 shows a coil of wire wrapped around a plastic tube. Inside the tube are two pieces of soft iron. When the switch is closed, the compass needles point in the direction of the magnetic field produced at each position. You may ignore the magnetic field of the Earth in this question.
The Essay on Power Supply Box Gel Current
BACKGROUND Before learning about electrolysis and electrophoresis it helps to become familiar with the power supply and gel box. The electrode at which electrons enter the gel box from the power supply (along the black wire) is called the cathode, negative (-). The electrons at which electrons leave the box and re-enter the power supply (along the red wire) is called the anode and carries a ...
For Examiner’s Use
B plastic tube compass
A
C
soft iron
switch Fig. 5.1 (a) On Fig. 5.1 mark arrows, in compasses A, B and C, to show the direction of the magnetic field at each position after the switch has been closed. [2] (b) When the switch is closed, the two pieces of soft iron in the tube become magnets and move. (i) On Fig. 5.1, mark the poles formed on each piece of soft iron. (ii) State and explain how the pieces of iron move. …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………………. ……………………………………………………………………………………………………………. [2] (c) State the effect on the magnetic field of (i) reversing the direction of the current, …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………….. [1] (ii) reducing the size of the current. …………………………………………………………………………………………………………………. …………………………………………………………………………………………………………….. [1] [1]
The Term Paper on Energy the Present and Future Scenario
It warms and cools our homes, cooks our food, plays our music, and gives us pictures on television. Energy is defined as the ability or the capacity to do work. We use energy to do work and make all movements. When we eat, our bodies transform the food into energy to do work. When we run or walk or do some work, we ‘burn’ energy in our bodies. Cars, planes, trolleys, boats, and machinery also ...
© UCLES 2005
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7 6 The table gives information about two household appliances. appliance mains supply voltage /V 240 240 current through appliance /A 1.20 12.6 power /W power / kW time used per day /h energy used per day / kW h
For Examiner’s Use
television water heater
288
0.288
2.50 0.50
0.720
(a) Write the missing values in the empty spaces in the table. (b) Why is more power needed for the water heater than for the television?
[3]
………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………… [1] (c) The water heater is connected to the mains supply. Explain why using a 3 A fuse would not be suitable. ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………… [2]
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8 7 Fig. 7.1 shows an electrical circuit. A
For Examiner’s Use
X
Fig. 7.1 (a) On Fig. 7.1, draw an arrow at A to show the direction of flow of the electrons in the wire. [1] (b) What is the name of component X? …………………………………………………………………………………………………………………… [1] (c) State and explain how the potential difference across X varies as the light shining on it becomes brighter. ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………… [2]
© UCLES 2005
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9 8 Three cells are connected in series making a battery, as shown in Fig. 8.1. The e.m.f. of each cell is 1.5 V. A resistance of 15 is connected to the battery.
For Examiner’s Use
15
Fig. 8.1 (a) What is the total e.m.f. of the battery? …………………………………………………………………………………………………………………… [1] (b) Calculate the current in the circuit. State the equation that you use.
current = ……………………….. [3] (c) A battery can be made from cells connected in parallel, as shown in Fig. 8.2.
Fig. 8.2 State one advantage of connecting the cells in parallel. ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… ………………………………………………………………………………………………………………………… …………………………………………………………………………………………………………………… [1]
© UCLES 2005 5054/02/M/J/05
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10 Section B Answer two questions from this section. Write your answers on the separate answer paper provided.
9
A train travels from one station to the next. It starts from rest at time t = 0 and accelerates uniformly for the first 20 s. At t = 20 s it reaches its top speed of 25 m/s. It then travels at this speed for a further 30 s before decelerating uniformly to rest. The total time for the journey is 60 s. (a) (i) Sketch a speed-time graph for the motion of the train. Do not use graph paper. Put the speed of the train on the y-axis and time along the x-axis. [3] (ii) Write down the equation, in words, that relates acceleration, time and change in velocity. [1] (iii) Explain what is meant by a uniform acceleration. (iv) Use your graph to calculate the deceleration of the train as it comes to rest. (b) Several forces act on the train when it is moving. (i) Name the horizontal and vertical forces that act on the train and give the direction of each force. [4] (ii) Explain whether the horizontal forces are balanced or unbalanced, 1. 2. 3. when the train accelerates, when the train travels at constant speed, when the train decelerates. [3] [1] [2]
You may draw diagrams to help your explanations.
(c) A second train has a non-uniform acceleration. Sketch a speed-time graph showing a non-uniform acceleration. Do not use graph paper. [1]
© UCLES 2005
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11 10 When a house is heated, energy is lost to the outside. Fig. 10.1 shows where the energy is lost from the house. roof
windows 10%
walls 35%
escape of hot air 15%
floors 15% Fig. 10.1 (a) (i) Calculate the percentage of the energy lost through the roof. [1]
(ii) Energy is lost through the roof by conduction and from the roof by convection and by radiation. Explain in detail how this happens. [6] (iii) Fitting carpets on the floor reduces energy loss. Explain how a carpet reduces energy loss. [2] (b) The table gives information about three methods of reducing energy loss.
method of reducing energy loss A B C fitting carpets on the floor insulating the roof fitting modern windows
installation cost $600 $300 X
saving on number of years of energy costs saving needed to cover in one year installation costs $10 Y $20 60 3 40 [2]
(i) Calculate the values of X and Y.
(ii) Which one of these three methods should the house owner choose? Explain your answer. [2] (iii) State two other ways, not already mentioned, of reducing energy loss from the house. [2]
© UCLES 2005 5054/02/M/J/05
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12 11 (a) Some atoms that undergo radioactive decay have a half-life of 6 hours. The count rate near a sample of these atoms is initially 838 counts/minute. Background radiation near the sample is 18 counts/minute. (i) Describe the structure of an atom. It may help to draw a diagram. [3]
(ii) Explain what is meant by radioactive decay. State clearly which part of the atom decays. [3] (iii) State what is meant by background radiation. [1]
(iv) The equipment is left undisturbed for 12 hours. Calculate the count rate due to the sample of atoms alone after this time. [2] (b) The table shows a radioactive series. Atom A emits a beta-particle and becomes atom B. Atom B then emits a particle to become atom C. proton number (atomic number) 83 X 82 nucleon number (mass number) 214 214 210 radiation emitted beta-particle Y none
atom A B C
(i) Calculate the proton number X of atom B and explain how you calculated it.
[2]
(ii) State the name of radiation Y and describe the changes that occur in the atom when this radiation is emitted. [3] (iii) Using information from the table, explain why atoms A and C are not isotopes of the same element. [1]
Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, the publisher will be pleased to make amends at the earliest possible opportunity. University of Cambridge International Examinations is part of the University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.
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