0625_s17_qp_42
A paper of Physics, 0625
Questions:
11
Year:
2017
Paper:
4
Variant:
2
Login to start this paper & get access to powerful tools
1
Speed is a scalar quantity and velocity is a vector quantity. State how a scalar quantity differs from a vector quantity. Underline the two scalar quantities in the list below. energy force impulse momentum temperature A boat is moving at constant speed. On , sketch a distance-time graph for the boat. distance time The boat in is moving due west at a speed of 6.5 m / s relative to the water. The water is moving due south at 3.5 m / s. In the space below, draw a scale diagram to determine the size and direction of the resultant of these two velocities. State the scale used. scale size of resultant velocity = direction of resultant
1. Motion, forces and energy  →  1.1. Physical quantities and measurement techniques
1. Motion, forces and energy  →  1.2. Motion
Open
2
shows a vehicle designed to be used on the Moon. The brakes of the vehicle are tested on Earth. The acceleration of free fall on the Moon is one sixth ( 6 1 ) of its value on Earth. Tick one box in each column of the table to predict the value of that quantity when the vehicle is used on the Moon, compared to the test on Earth. mass of vehicle on Moon weight of vehicle on Moon deceleration of vehicle on Moon with same braking force
1. Motion, forces and energy  →  1.2. Motion
1. Motion, forces and energy  →  1.3. Mass and weight
6. Space physics  →  6.1.1. The Earth
Open
6
# value on Earth same as value on Earth 1 # value on Earth 1 # value on Earth shows the brake pedal of the vehicle. 24 cm 7.0 cm pivot piston pedal link force exerted by driver oil cylinder (not to scale) The driver exerts a force on the pedal, which increases the pressure in the oil to operate the brakes. The area of the piston in the cylinder is 6.5 # 10–4 m2 (0.00065 m2). The pressure increase in the oil is 5.0 # 105 Pa (500 000 Pa). Calculate the force exerted by the driver on the brake pedal. force =
1. Motion, forces and energy  →  1.8. Pressure
1. Motion, forces and energy  →  1.5.1. Effects of forces
Open
3
Underline the pair of quantities which must be multiplied together to calculate impulse. force and mass force and velocity mass and time time and velocity weight and velocity force and time shows a collision between two blocks A and B on a smooth, horizontal surface. before collision 2.4 kg A 1.2 kg B after collision A B 3.0 m / s v Before the collision, block A, of mass 2.4 kg, is moving at 3.0 m / s. Block B, of mass 1.2 kg, is at rest. After the collision, blocks A and B stick together and move with velocity v. Calculate 1. the momentum of block A before the collision, momentum = 2. the velocity v, velocity = 3. the impulse experienced by block B during the collision. impulse = Suggest why the total kinetic energy of blocks A and B after the collision is less than the kinetic energy of block A before the collision.
1. Motion, forces and energy  →  1.6. Momentum
Open
4
A balloon contains a fixed mass of gas. Explain, in terms of the momentum of molecules, how the gas in the balloon exerts a pressure. Explain, in terms of molecules, why the pressure of the gas increases when the volume of the balloon decreases. The temperature of the gas is constant. The initial volume of the gas is 500 cm3 and its pressure is 1.1 # 105 Pa. The volume is reduced to 200 cm3. The temperature of the gas is constant. Calculate the new pressure. pressure =
2. Thermal physics  →  2.1.3. Gases and the absolute scale of temperature
2. Thermal physics  →  2.1.2. Particle model
Open
5
An electric kettle contains 600 g of water at 20 °C. The heater in the kettle operates at 240 V. The specific heat capacity of water is 4200 J / (kg °C). The current in the heater is 12 A. Calculate the time taken for the temperature of the water to rise to 100 °C. time = State one assumption you made in your calculation in . Using the apparatus shown in , describe an experiment to demonstrate good and bad emitters of thermal radiation. Include the expected results and the conclusion. You may use a diagram. a ruler supply of hot water 2 thermometers metal water bottle black side white side The graph in represents a wave on a rope. 8.0 6.0 4.0 2.0 distance along rope / cm vertical position / cm Using , determine the amplitude of the wave, amplitude = the wavelength of the wave. wavelength = A wave travelling on the surface of water has a wavelength of 2.5 cm and a speed of 8.0 cm / s. Calculate the frequency of the wave. frequency = The wave in approaches a barrier that has a large gap in its centre. shows the crests of the wave viewed from above. direction of wave travel wave crest λ barrier gap barrier The gap in the barrier is larger than the wavelength λ. On , draw the pattern formed by three crests after the wave passes through the gap in the barrier. Water is added to the tank and the speed of a wave in the deeper water is greater than that in the shallower water. The frequency of the wave remains constant but its wavelength is different. 1. State and explain how the wavelength in the deeper water has changed. 2. Apart from the change in wavelength, describe one other difference in the pattern formed by the crests after the wave passes through the gap.
3. Waves  →  3.1. General properties of waves
Open
7
The speed of light in air is 3.0 # 108 m / s. The speed of light in a transparent liquid is 2.0 # 108 m / s. A ray of light is incident on the surface of the liquid at an angle of incidence of 40°. Calculate the refractive index of the liquid, refractive index = the angle of refraction in the liquid. angle of refraction = shows a side view of an object at the bottom of a tank of liquid. Light travels slower in this liquid than in air. tank eye air liquid object On , draw two rays from the object into the air. Use these rays to locate the image. Label this image I.
3. Waves  →  3.2.2. Refraction of light
Open
8
shows a 12.0 V power supply connected in a circuit. 12.0 V A X B sliding contact resistance wire (not to scale) The circuit includes a lamp and a resistance wire AB of constant cross-sectional area. There is a sliding contact that can be moved between A and B. The rating of the lamp at normal brightness is 6.0 V, 9.0 W. Calculate the current in the lamp at normal brightness, current = the resistance of the lamp at normal brightness. resistance = AB is 1.00 m long and has a resistance of 5.0 Ω. The lamp has normal brightness when the sliding contact is at X. The sliding contact is moved to B. Explain, without a calculation, why the lamp becomes dimmer. Calculate the distance AX for the lamp to have normal brightness. distance AX =
4. Electricity and magnetism  →  4.2.4. Resistance
Open
9
shows a horizontal wire PQ placed in the gap between the N pole and the S pole of a magnet. N S P Q There is a current in the wire in the direction P to Q. A force acts on the current-carrying wire in the magnetic field. On , draw an arrow, labelled M to show the direction of the magnetic field in the gap between the poles of the magnet, an arrow, labelled F to show the direction of the force on the current-carrying wire due to the magnetic field of the magnet. State the effect of reversing the direction of the current in wire PQ. The magnet is removed and the horizontal, current-carrying wire is left on its own, as shown in . P Q On , sketch the pattern of the magnetic field due to the current in the wire. Indicate the field direction. The current in PQ is increased. State the effect of this change in current on the magnetic field. A small magnet is placed at a point where the magnetic field is vertically upwards. State the direction of the force on the S pole of the small magnet. 10 In the space, draw the standard symbol for a light-emitting diode (LED). Table 10.1 shows the truth table for a logic gate. Table 10.1 input 1 input 2 output State the name of the logic gate which has this truth table. It is possible to connect together the two inputs of the gate in . Using two or more of the logic gates in , design a circuit with two inputs and one output which has the truth table shown in Table 10.2. Table 10.2 input 1 input 2 intermediate point, X output Draw your circuit in the space below. There is no need to use the symbol for the logic gate. Boxes with the two inputs and one output are sufficient. Label an intermediate point of your circuit with the letter X. Complete the table with the logic levels for this point in the blank column of the table.
4. Electricity and magnetism  →  4.1. Simple phenomena of magnetism
4. Electricity and magnetism  →  4.5.3. Magnetic effect of a current
Open
11
The arrows in represent the paths of three α-particles moving towards gold nuclei in a thin foil. The gold nuclei are shown as shaded circles. On , complete the paths of the three α-particles. shows a geologist holding a radiation detector near a rock. radiation detector rock She holds the detector in a fixed position and records the readings shown in Table 11.1. Table 11.1 time / minutes detector reading counts / minute Explain the changes in the detector readings. A technician is handling a solid radioactive sample that emits α-particles and β-particles. The technician wears thick rubber gloves. Explain why this may provide some protection from the radiation, but it is not sufficient protection.
5. Nuclear physics  →  5.2.3. Radioactive decay
5. Nuclear physics  →  5.2.1. Detection of radioactivity
Open