0625_s14_qp_21
A paper of Physics, 0625
Questions:
12
Year:
2014
Paper:
2
Variant:
1
Login to start this paper & get access to powerful tools
1
A gardener studies the growth of one of his plants. At the same time each day, he measures the height h of the top of the plant from the ground, as shown in . h The table of his results is shown below. time since first measurement / days height h / cm 2.1 6.5 11.4 18.4 24.5 26.7 30.7 37.1 From the values in the table, deduce the average speed of growth of the plant during the 7 days. Work in days and cm. average speed = cm / day Complete by plotting the last three values of height h against time. Do not draw a line through the points. h / cm time / days Describe how the graph shows that the speed of growth of the plant is not constant.
1. Motion, forces and energy  →  1.2. Motion
Open
2
shows a spring before and after a load is added. load spring What is meant by the extension of the spring? When the graph of extension against load is drawn for the spring, the result is the line shown in . extension / cm load / N The unstretched length of the spring is 9.0 cm. 1. Calculate the total length of the spring when a 5.0 N load is hanging from the spring. length = cm 2. Find the extension that will be caused by a load of 2.0 N. extension = cm Calculate the mass of a load of weight 2.0 N. mass =
1. Motion, forces and energy  →  1.5.1. Effects of forces
Open
3
The apparatus in is being used to view the movement of some smoke particles trapped in a box. air molecules and smoke particles microscope light Describe what is seen when the smoke is viewed through the microscope. In the space below, sketch how one smoke particle might move during a short interval of time. What causes the smoke particles to move? What name is used for this motion of the smoke particles? Complete the sentence. The motion of the smoke particles is known as motion.
2. Thermal physics  →  2.1.2. Particle model
Open
4
A young boy, skating on a frozen pond, has fallen through some thin ice about 10 m from the shore of the pond. shows the situation. A man, standing near the pond, hears the boy’s shouts for help. The man weighs more than the boy. Why would it be unsafe for the man to walk on the ice to rescue the boy? Suggest and explain what the man could do to cross the ice to reach the boy safely.
1. Motion, forces and energy  →  1.6. Momentum
1. Motion, forces and energy  →  1.2. Motion
1. Motion, forces and energy  →  1.7.1. Energy
Open
5
The thermometer in is recording the temperature of the laboratory. –10 110 °C The bulb of the thermometer is placed in pure, boiling water at standard atmospheric pressure. State the temperature increase. temperature increase = °C During the day, the temperature in the laboratory rises. In the late afternoon a thermometer attached to the ceiling records a higher temperature than a thermometer placed close to the ground. Explain why this happens. At night, the temperature in the laboratory falls. Describe what can be seen happening to the liquid in a thermometer as the temperature falls, and explain why this happens. On , draw an arrow to show where the end of the liquid thread might be seen when the temperature being measured is −15°C.
2. Thermal physics  →  2.1.3. Gases and the absolute scale of temperature
2. Thermal physics  →  2.2.3. Melting, boiling and evaporation
Open
6
A periscope is an optical instrument containing two mirrors in a long tube. shows the path of a ray of light through a periscope, without the tube. mirror A mirror B normal normal On , 1. use the letter i to indicate clearly the angle of incidence of the ray striking mirror A, 2. use the letter r to indicate clearly the angle of reflection of the ray leaving mirror A. Write down the equation that links i and r. Suggest a use for the periscope. State what happens if mirror B is rotated through a small angle. shows a converging lens. The lens has one principal focus at F1 and the other principal focus at F2. F2 F1 principal axis Use your ruler to help you answer this question. On , clearly mark two distances that are each the focal length of the lens. On , draw a ray on the left side of the lens, which strikes the lens, above and parallel to the principal axis. Label this ray: ray 1. Continue this ray to show its path through the lens and at least 6 cm to the right of the lens. On , draw a ray that emerges from the lens, below and parallel to the principal axis. Label this ray: ray 2. Show clearly the path of this ray before it reached the lens.
3. Waves  →  3.2.3. Thin lenses
Open
7
In , XY is a copper rod placed between the N and S poles of a magnet. N S X Y A B XY is connected to the terminals A and B of a sensitive, centre-zero instrument that measures current. State the name of this instrument. When there is no current, the pointer on the instrument points half-way between A and B. State what, if anything, is seen happening to the pointer when XY is held stationary, moved horizontally at a steady speed towards the N pole, moved horizontally at a steady speed towards the S pole, moved repeatedly up and down at right angles to the magnetic field. Suggest one electrical device that makes use of the effect demonstrated in .
4. Electricity and magnetism  →  4.5.3. Magnetic effect of a current
4. Electricity and magnetism  →  4.5.4. Force on a current-carrying conductor
Open
8
A student connects the circuit shown in . 6.0 V 10 Ω S2 S1 When operating normally, the lamp has a resistance of 10 Ω. State the current in the lamp when both S1 and S2 are open. The student closes switch S1. Calculate the current in the lamp, stating the unit of your answer. current = The student now closes S2 as well as S1. State the current in the lamp with both switches closed. The student decides that she would like to be able to vary the brightness of the lamp. Name an electrical component that she could add to the circuit to do this. In the space below, redraw the circuit of , including the component for varying the lamp brightness.
4. Electricity and magnetism  →  4.2.4. Resistance
4. Electricity and magnetism  →  4.3.3. Action and use of circuit components
Open
9
Describe how the N pole of a bar magnet can be identified. Use words from the following list to answer the three questions below. attractive force repulsive force no force What force is there between two N poles, two S poles, a N pole and a S pole? shows an iron bar placed close to the N pole of a bar magnet. N magnet iron bar On , write N and S, to indicate the induced poles in the iron bar. Use a word from the list in to describe the force between the magnet and the iron bar. The iron bar is reversed end-to-end. Describe the force that now exists between the magnet and the iron bar.
4. Electricity and magnetism  →  4.1. Simple phenomena of magnetism
Open
11
Polonium-210 210Poj ` is radioactive. Name three types of emission from radioactive sources. 1. 2. 3. State which of these radiations carries a negative charge, is most easily absorbed, is the emitted particle in the decay 210Po 206Pb + emitted particle. Polonium-210 has a half-life of 138 days. A sample containing 8 × 1010 atoms of polonium-210 decays for 276 days. How many half-lives elapse in this time? How many atoms decay in this time? number that decay = How many particles are emitted from the polonium-210 during this time? number emitted =
5. Nuclear physics  →  5.2.3. Radioactive decay
5. Nuclear physics  →  5.2.2. The three types of nuclear emission
Open