0625_w18_qp_41
A paper of Physics, 0625
Questions:
11
Year:
2018
Paper:
4
Variant:
1
Login to start this paper & get access to powerful tools
1
A train of mass 5.6 × 105 kg is at rest in a station. At time t = 0 s, a resultant force acts on the train and it starts to accelerate forwards. is the distance-time graph for the train for the first 120 s. time t / s distance / m Use to determine: 1. the average speed of the train during the 120 s average speed = 2. the speed of the train at time t = 100 s. speed = Describe how the acceleration of the train at time t = 100 s differs from the acceleration at time t = 20 s. The initial acceleration of the train is 0.75 m / s2. Calculate the resultant force that acts on the train at this time. resultant force = At time t = 120 s, the train begins to decelerate. State what is meant by deceleration.
1. Motion, forces and energy  →  1.2. Motion
Open
3
State what is meant by the principle of conservation of energy. shows a girl throwing a heavy ball. ball State the energy changes that take place from when the girl begins to exert a force on the ball until the ball hits the ground and stops moving. The mass of the ball is 4.0 kg. The girl exerts a force on the ball for 0.60 s. The speed of the ball increases from 0 m / s to 12 m / s before it leaves the girl’s hand. Calculate: 1. the momentum of the ball on leaving the girl’s hand momentum = 2. the average resultant force exerted on the ball. average resultant force =
1. Motion, forces and energy  →  1.6. Momentum
1. Motion, forces and energy  →  1.7.1. Energy
Open
4
shows liquid in a cylinder. cylinder liquid The depth of the liquid is 10 cm and the radius of the cylinder is 3.0 cm. The weight of the liquid in the cylinder is 2.5 N. Calculate the density of the liquid. density = shows a device that measures the pressure of a gas supply. liquid gas supply h State the name of the device. The difference h between the two liquid levels is 2.0 cm. The density of the liquid is 800 kg / m3. Calculate the difference between the pressure of the gas and atmospheric pressure. pressure difference = A similar device with a tube of smaller cross-sectional area is connected to a gas supply at the same pressure. State and explain any effect on the value of h.
1. Motion, forces and energy  →  1.8. Pressure
1. Motion, forces and energy  →  1.4. Density
Open
5
In the space below, draw a labelled diagram of the structure of a thermocouple thermometer. Include the device from which a reading is taken. A thermocouple thermometer is used to measure the temperature of the flame of a small candle. State two reasons why the thermocouple thermometer is suitable for this application. 1. 2. State and explain any effect on the sensitivity of a liquid-in-glass thermometer of: reducing the diameter of the capillary tube increasing the volume of the liquid-filled bulb.
2. Thermal physics  →  2.2.3. Melting, boiling and evaporation
2. Thermal physics  →  2.2.2. Specific heat capacity
Open
7
A laser produces a beam of monochromatic light. State what is meant by the term monochromatic. A wave, in air, is incident on a glass block. shows the wavefronts at the air-glass boundary. The arrow shows the direction of travel of the wavefronts. air direction of travel of wavefronts glass The wave undergoes reflection and refraction at the air-glass boundary. On draw: the wavefronts of the reflected wave the wavefronts of the refracted wave. A transverse wave is produced in a long, horizontal rope. The rope is much longer than the wavelength of the wave. In the space below, sketch a diagram to show the appearance of the rope as the wave passes along it. Label two important features of the wave.
3. Waves  →  3.1. General properties of waves
Open
9
shows the symbol for a 12 V battery. 12 V Two lamps are connected in parallel with the battery. On , using the correct symbols, complete the circuit diagram. One of these lamps has a resistance of 6.0 Ω. Calculate, for this lamp: the current current = the power. power = The power of the other lamp is 36 W. Calculate the total energy delivered to this lamp in 20 hours. energy =
4. Electricity and magnetism  →  4.2.5. Electrical energy and electrical power
4. Electricity and magnetism  →  4.2.4. Resistance
Open
10
A transformer consists of two coils of wire wound on a metal core. represents the transformer. core secondary coil primary coil State the name of the metal from which the core is made. The primary coil of the transformer is connected to the output voltage of an a.c. generator which supplies an alternating current. Explain why there is a voltage between the two terminals of the secondary coil. There are 560 turns on the primary coil and 910 turns on the secondary coil of the transformer. The voltage between the two terminals of the secondary coil is 78 V. Calculate the voltage supplied by the a.c. generator. generator voltage = Transformers are used to increase the voltage when electrical energy is transmitted in cables across long distances. Explain why power losses in the cables are lower when the voltage is high.
4. Electricity and magnetism  →  4.5.6. The transformer
Open
11
shows data about nine elements. proton number element symbol helium He lithium Li beryllium Be boron B carbon C nitrogen N oxygen O fluorine F neon Ne Carbon-14 is a radioactive isotope with a nucleon number of 14. It decays by emitting β-particles. Use any data you need from to write down the nuclide equation for this decay. A radioactive sample is placed close to a detector. The radioactive isotope in the sample has a long half-life. The detector records a count rate of 597 counts / s. shows the readings when different materials are placed between the radioactive sample and the detector. material count rate counts / s a sheet of paper a piece of thin aluminium a piece of thin lead Explain whether any α-particles, β-particles or γ-rays are emitted by the radioactive sample. α-particles β-particles γ-rays
5. Nuclear physics  →  5.2.3. Radioactive decay
5. Nuclear physics  →  5.2.4. Half-life
Open