0625_s19_qp_31 - revisedeck

0625_s19_qp_31

A paper of Physics, 0625

Questions:

12

Year:

2019

Paper:

3

Variant:

1

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1

A student has a metal object. The student measures the mass of the object. State the name of the equipment used to measure the mass. The mass of the metal object is 1260 g. The volume of the metal is 150 cm3. Calculate the density of the metal. Include the unit. density = The mass of the metal object is given in grams. State the mass in kg. mass = kg A vase is placed on a table. Forces X and Y act on the vase, as shown in . vase X Y The mass of the vase is 0.25 kg. The vase is not moving. Calculate the value of force X and the value of force Y. X Y

1. Motion, forces and energy → 1.3. Mass and weight

1. Motion, forces and energy → 1.4. Density

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2

shows a man pushing down on a lever to lift one end of a heavy log. heavy log lever State the term used to describe the turning force exerted by the man. shows the forces acting as the man starts to lift the heavy log. 0.3 m 1.2 m 400 N pivot lever F Calculate the force F, exerted by the lever on the heavy log. force F = N Describe how the man can use a smaller force to lift the heavy log.

1. Motion, forces and energy → 1.5.2. Turning effect of forces

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3

A teacher investigates the reaction time of five students. A 0.50 m ruler is held above the hand of a student before being allowed to fall. The arrangement is shown in . teacher’s hand student’s hand As soon as the ruler falls the student closes their hand, catching the ruler. The further the ruler falls, the greater the reaction time of the student. The results obtained are shown in . A B C D E distance ruler falls / cm students Using the results shown in , calculate the average distance that the ruler drops. average distance = cm List the students in order of their reaction times, with the shortest reaction time at the top of the table. One has been done for you. order student 1st 2nd 3rd B 4th 5th In a similar investigation, a ruler drops a distance of 11.0 cm and has an average speed of 16 cm / s. Calculate the reaction time. reaction time = s

1. Motion, forces and energy → 1.2. Motion

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4

shows a pin. shows a person pushing the pin into a wall. top surface of the pin The area of the top surface of the pin is 1.8 cm2. The person applies a force of 50 N. Calculate the pressure exerted on the top surface of the pin. pressure = N / cm2 The area of the top surface of the pin is 500 times larger than the area of the point. Calculate the value of the pressure exerted by the point on the wall. pressure = N / cm2 shows a simple device for measuring atmospheric pressure. mercury mercury column space 760 mm State the name given to the device shown in . State what, if anything, is in the space at the top of the tube, above the mercury column. shows normal atmospheric pressure. Suggest a possible value for the height of the mercury column when atmospheric pressure decreases. Include the unit. reading =

1. Motion, forces and energy → 1.8. Pressure

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5

Coal is a non-renewable source of energy. Explain what is meant by the term non-renewable. There are other non-renewable sources of energy. Place a tick in the box by each non-renewable source of energy. nuclear oil solar wave wind State two advantages and two disadvantages of using natural gas as an energy source. advantages 1. 2. disadvantages 1. 2.

1. Motion, forces and energy → 1.7.3. Energy resources

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6

A liquid-in-glass thermometer is placed in some ice made from pure water. The ice is heated. It changes to water and then to steam. The graph in shows how the temperature varies with time. The values of temperature are missing from the y-axis. time / minutes temperature / °C Y X On , suggest a value for the temperature at each of the three points marked on the y-axis. Write a value in each of the boxes. In both section X and section Y the line on the graph is horizontal. For each section, state the name for the process taking place and explain what is happening to the molecules. section X name explanation section Y name explanation

2. Thermal physics → 2.2.3. Melting, boiling and evaporation

2. Thermal physics → 2.1.3. Gases and the absolute scale of temperature

2. Thermal physics → 2.2.1. Thermal expansion of solids, liquids and gases

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7

shows some devices that each use one type of electromagnetic radiation. device electromagnetic radiation radio binoculars for daytime use sunbed TV remote controller gamma rays X-rays ultraviolet light visible light infra-red rays microwaves radio waves Draw one line from each device to the correct type of electromagnetic radiation. One has been done for you. State the name of one type of radiation that has a longer wavelength than visible light. Complete the sentence about electromagnetic radiation. Use a word from the box. amplitude frequency speed wavelength All types of electromagnetic radiation travel through a vacuum with the same

3. Waves → 3.3. Electromagnetic spectrum

2. Thermal physics → 2.3.3. Radiation

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8

A student rubs a plastic rod with a dry cloth, as shown in . The rod becomes negatively charged. plastic rod dry cloth Use words from the box to complete the sentence. air cloth electrons hand neutrons protons The rod becomes negatively charged because move from the to the rod. The student moves the rod close to a suspended, charged rod. The two rods repel each other. State the type of charge on the suspended rod. Explain your answer to . A device has a metal case. Any charge on the case must be able to move to earth. Draw one ring around a material that is suitable for the connection to earth. copper glass plastic rubber Explain your answer to .

4. Electricity and magnetism → 4.2.1. Electric charge

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9

A student makes a circuit to switch on a 6.0 V lamp from two different switches X and Y. shows the circuit. 6.0 V + – switch X switch Y P R S Q Switch X is in position P. State the position of switch Y for the lamp to be lit. The current in the lamp is 0.50 A when the potential difference (p.d.) across the lamp is 6.0 V. Calculate the resistance of the lamp. Include the unit. resistance = The student connects another 6.0 V lamp in parallel with the first lamp, as shown in . 6.0 V + – switch X switch Y Give two advantages of connecting the lamps in parallel.

4. Electricity and magnetism → 4.3.2. Series and parallel circuits

4. Electricity and magnetism → 4.2.4. Resistance

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10

A teacher demonstrates the action of a device. shows the symbol for the device. State the name of this device. shows another device being used in a circuit. The circuit contains a 6.0 V lamp. 12 V + – sliding contact C B A The sliding contact of this device is at position A, as shown in . Describe and explain the brightness of the lamp when the sliding contact is in this position. brightness of lamp explanation The teacher moves the sliding contact from position A to position B. Describe and explain what happens to the brightness of the lamp. The teacher moves the sliding contact from position B to position C. Suggest what happens to the lamp.

4. Electricity and magnetism → 4.3.3. Action and use of circuit components

4. Electricity and magnetism → 4.2.4. Resistance

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11

shows in each of the diagrams a current-carrying conductor and a magnetic field pattern. A B C current-carrying conductor current-carrying conductor current-carrying conductor State the diagram which correctly shows the magnetic field around a current-carrying conductor. shows three pieces of equipment. coil coil with 100 turns of wire sensitive centre-zero meter bar magnet S N Describe how to generate and detect an electromotive force (e.m.f.) using the equipment in . You may draw a diagram. Describe two changes that will generate a larger e.m.f. using similar equipment to that in . A student connects a lamp and centre-zero galvanometer in series with a generator, as shown in . lamp centre-zero galvanometer generator G The student observes the galvanometer needle moving from side-to-side repeatedly. Explain why the needle moves in this way.

4. Electricity and magnetism → 4.5.4. Force on a current-carrying conductor

4. Electricity and magnetism → 4.5.1. Electromagnetic induction

4. Electricity and magnetism → 4.5.3. Magnetic effect of a current

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12

Use words from the box to complete the sentences about the charges in an atom. Words can be used once, more than once or not at all. negative neutral positive The charge on the nucleus of an atom is The charge on a proton is The charge on electrons orbiting the nucleus is A nucleus of radium-226 has the nuclide notation shown. 88Ra Determine the number of protons in a nucleus of radium-226. Determine the number of neutrons in a nucleus of radium-226. Radium has another isotope, radium-223. Write the nuclide notation for radium-223 in the space. Radium-226 has a half-life of 1600 years. A sample contains 8.0 mg of radium-226. Calculate the time for the sample to decay until only 1.0 mg of radium-226 remains. time = years

5. Nuclear physics → 5.1.2. The nucleus

5. Nuclear physics → 5.2.3. Radioactive decay

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