DP Physics Questionbank

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Overview of essential ideas for this topic.

8.1: The constant need for new energy sources implies decisions that may have a serious effect on the environment. The finite quantity of fossil fuels and their implication in global warming has led to the development of alternative sources of energy. This continues to be an area of rapidly changing technological innovation.

8.2: For simplified modelling purposes the Earth can be treated as a black-body radiator and the atmosphere treated as a grey-body.

Directly related questions

• 18M.2.SL.TZ2.5b: After the upper lake is emptied it must be refilled with water from the lower lake and this...
• 18M.2.SL.TZ2.5a.iii: The storage system produces 1.8 GW of electrical power. Determine the overall efficiency of the...
• 18M.2.SL.TZ2.5a.ii: Show that the average rate at which the gravitational potential energy of the water decreases is...
• 18M.2.SL.TZ2.5a.i: Estimate the specific energy of water in this storage system, giving an appropriate unit for your...
• 18M.1.SL.TZ2.30: Mars and Earth act as black bodies....
• 18M.1.SL.TZ2.29: Three gases in the atmosphere are           I.     carbon dioxide (CO2)           II.   ...
• 18M.1.SL.TZ2.28: A wind turbine has a power output p when the wind speed is v. The efficiency of the wind...
• 18M.1.HL.TZ2.23: What part of a nuclear power station is principally responsible for increasing the chance that...
• 18M.1.HL.TZ2.22: The Sankey diagram shows the energy input from fuel that is eventually converted to...
• 18M.2.SL.TZ1.6c.iv: Derive the units of intensity in terms of fundamental SI units.
• 18M.2.SL.TZ1.6c.iii: Calculate the peak wavelength in the intensity of the radiation emitted by the ice sample.
• 18M.2.SL.TZ1.6c.ii: Discuss how the frequency of the radiation emitted by a black body can be used to estimate the...
• 18M.2.SL.TZ1.6c.i: State what is meant by thermal radiation.
• 18M.2.HL.TZ1.6c.iv: The temperature in the laboratory is higher than the temperature of the ice sample. Describe one...
• 18M.1.SL.TZ1.30: The diagram shows a simple climate model for the Earth. What does this model predict for the...
• 18M.1.SL.TZ1.29: Three energy sources for power stations are        I.     fossil fuel        II.     pumped...
• 18M.1.SL.TZ1.28: What is equivalent...
• 18M.1.HL.TZ1.24: The dashed line on the graph shows the variation with wavelength of the intensity of solar...
• 18M.1.HL.TZ1.23: A nuclear reactor contains atoms that are used for moderation and atoms that are used for...
• 17N.2.SL.TZ0.5b.ii: Suggest how the difference between λS and λE helps to account for the greenhouse effect.
• 17N.2.SL.TZ0.5b.i: Determine the mean temperature of the Earth.
• 17N.1.SL.TZ0.29: The three statements give possible reasons why an average value should be used for the solar...
• 17N.1.SL.TZ0.28: A black body emits radiation with its greatest intensity at a wavelength of Imax. The...
• 17N.1.SL.TZ0.27: The energy density of a substance can be calculated by multiplying its specific energy with which...
• 17N.1.SL.TZ0.26: Which of the energy sources are classified as renewable and non-renewable?
• 10N.2.HL.TZ0.A2b.ii: All the energy output of the room heater raises the temperature of the air moving through it. Use...
• 09N.1.SL.TZ0.30: In a nuclear power station, a moderator is required to A.     control the rate of fission. B. ...
• 09N.1.SL.TZ0.29: Venus and Earth may be regarded as behaving as black bodies. The mean temperature at the surface...
• 09N.1.SL.TZ0.28: Which of the following is likely to increase greenhouse gas concentrations in the...
• 10M.1.SL.TZ1.28: Which of the following correctly shows the energy change in a photovoltaic cell and in a solar...
• 10M.1.SL.TZ1.27: Which of the following correctly describes both the role of the moderator and of the control rods...
• 09M.1.SL.TZ1.30: The rate of global warming might be reduced by A.     replacing the use of coal and oil with...
• 09M.1.SL.TZ1.29: Greenhouse gases A.     reflect infrared radiation but absorb ultraviolet radiation. B.   ...
• 09M.1.SL.TZ1.28: One disadvantage of using photovoltaic cells to power a domestic water heater is that A.   ...
• 09M.1.SL.TZ1.27: In a nuclear power station, uranium is used as the energy source and plutonium-239 is produced....
• 09M.1.SL.TZ1.26: The energy source that currently provides the greatest proportion of the world’s total energy...
• 14M.2.SL.TZ2.4d: (i)     State the principle of conservation of momentum. (ii)     Show that the speed of the...
• 14N.2.SL.TZ0.6d.ii: Comment on whether it is better to use a solar heating panel rather than an array of photovoltaic...
• 14N.2.SL.TZ0.6d.i: Calculate the minimum area of solar heating panel required to provide this power.
• 14N.2.SL.TZ0.6c.ii: State two reasons why the intensity of solar radiation at the location of the panel is not...
• 14N.2.SL.TZ0.6c.i: Determine the efficiency of the photovoltaic panel.
• 14N.2.SL.TZ0.6b: With reference to the energy transformations and the operation of the devices, distinguish...
• 14N.2.SL.TZ0.6a: The Sun is a renewable energy source whereas a fossil fuel is a non-renewable energy source....
• 14N.2.SL.TZ0.5e.ii: control rods.
• 14N.2.SL.TZ0.5e.i: moderator.
• 14N.2.SL.TZ0.5d.ii: Calculate the power output of the nuclear power station.
• 14N.2.SL.TZ0.5d.i: Determine the mass of U-235 that undergoes fission in the reactor every day.
• 14N.2.HL.TZ0.3d: Outline how energy released in the nuclear reactor is transformed to electrical energy.
• 14N.2.HL.TZ0.3c: In addition to the U-235, the nuclear reactor contains graphite that acts as a moderator. Explain...
• 14N.2.HL.TZ0.3b.ii: Calculate the power output of the nuclear power station.
• 14N.2.HL.TZ0.3b.i: Determine the mass of U-235 that undergoes fission in the reactor every day.
• 15N.2.SL.TZ0.5d.ii: A hydroelectric scheme has an efficiency of 92%. Water stored in the dam falls through an average...
• 15N.2.SL.TZ0.5d.i: Describe the main principles of the operation of a pump storage hydroelectric scheme.
• 15N.2.SL.TZ0.5c.i: Determine the maximum amount of energy, in joule, released by 1.0 g of uranium-235 as a result of...
• 15N.2.SL.TZ0.5b.ii: moderator.
• 15N.2.SL.TZ0.5b.i: heat exchanger.
• 15N.2.SL.TZ0.5a: Outline which of the three generation methods above is renewable.
• 15N.1.SL.TZ0.29: The average surface temperature of Mars is about 200 K. The average surface temperature of Earth...
• 15N.1.SL.TZ0.27: It is suggested that the solar power incident at a point on the Earth’s surface depends on I.   ...
• 15M.1.SL.TZ1.26: In nuclear power production, what is one advantage of a nuclear fusion reactor over a nuclear...
• 15M.1.SL.TZ1.27: The Earth rotates about an axis XY, as shown below. P and Q are positions on the Earth’s...
• 15M.1.SL.TZ1.28: Which type of power-production system is most suitable for responding to a sudden high increase...
• 15M.1.SL.TZ2.6: An electric motor is used to lift a heavy load. The Sankey diagram shows the energy...
• 15M.1.SL.TZ2.30: Methane and carbon dioxide are both greenhouse gases that are believed to cause global warming....
• 15M.1.HL.TZ2.36: The graph shows the variation with wavelength of intensity of radiation emitted by two bodies X...
• 15M.1.HL.TZ2.37: Methane and carbon dioxide are both greenhouse gases that are believed to cause global warming....
• 15M.1.SL.TZ2.26: What is the purpose of the moderator in a nuclear power station? A. To absorb fast moving...
• 15M.2.SL.TZ1.4a: Suggest the conditions that would make use of wind generators in combination with either oil or...
• 15M.2.SL.TZ1.4b: Conventional horizontal-axis wind generators have blades of length 4.7m. The average wind speed...
• 15M.2.SL.TZ1.4c: The energy flow diagram (Sankey diagram) below is for an oil-fired power station that the...
• 15M.2.SL.TZ1.4d: The emissions from the oil-fired power station in (c) are likely to increase global warming by...
• 15M.2.SL.TZ1.4e: Nuclear fuel must be enriched before it can be used. Outline why fuel enrichment is needed.
• 15M.2.SL.TZ1.4f: The nuclear equation below shows one of the possible fission reactions in a nuclear...
• 15M.2.SL.TZ1.4g: A nuclear reactor requires both control rods and a moderator to operate. Outline, with reference...
• 15M.2.HL.TZ1.6a: Suggest the conditions that would make use of wind generators in combination with either oil or...
• 15M.2.HL.TZ1.6b: Conventional horizontal-axis wind generators have blades of length 4.7 m. The average wind speed...
• 15M.2.SL.TZ2.4a: (i) Determine the diameter that will be required for the turbine blades to achieve the maximum...
• 15M.2.SL.TZ2.4b: Currently, a nearby coal-fired power station generates energy for the community. Less coal will...
• 14M.1.SL.TZ1.29: A uranium nuclear fission reactor that attempts to operate without a moderator would A. suffer...
• 14M.1.SL.TZ1.26: A black body has kelvin temperature T and surface area A. The total power radiated by the body is...
• 14M.1.SL.TZ1.25: A natural gas power station has an output of 600 MW and an efficiency of 50%. The mass of natural...
• 14M.1.SL.TZ1.27: Which of the following best defines non-renewable fuels? A. They produce a lot of degraded...
• 14M.1.SL.TZ1.28: The average intensity of the solar radiation incident on a planet is 200 W m–2. The albedo of the...
• 14M.1.HL.TZ1.37: A body X of emissivity e is at temperature T1. X is inside a box whose walls act as a black body...
• 14M.1.HL.TZ1.38: In a hydroelectric power plant, water of density 103kgm–3 falls through an average height of...
• 14M.1.SL.TZ2.26: A black body has absolute temperature T and surface area A. The intensity of the radiation...
• 14M.1.SL.TZ2.29: The greenhouse effect can be explained by the fact that the infrared radiation emitted by the...
• 14M.1.SL.TZ2.27: In the production of energy from nuclear fission, fuel enrichment means increasing, in the fuel...
• 14M.1.SL.TZ2.28: In a wind generator, the kinetic energy of the wind cannot be completely converted into...
• 14M.1.HL.TZ2.35: A black body has absolute temperature T and surface area A. The intensity of the radiation...
• 14M.2.SL.TZ1.2a: (i) Show that the mass of sea water released between successive high and low tides is about...
• 14M.2.SL.TZ1.2b: (i) Identify one mechanism through which energy is transferred to the surroundings during the...
• 14M.2.SL.TZ1.4a: State the Stefan-Boltzmann law for a black body.
• 14M.2.SL.TZ1.4b: Deduce that the solar power incident per unit area at distance d from the Sun is given...
• 14M.2.SL.TZ1.4d: State two reasons why the solar power incident per unit area at a point on the surface of the...
• 14M.2.SL.TZ1.4c: Calculate, using the data given, the solar power incident per unit area at distance d from the Sun.
• 14M.2.SL.TZ1.4e: The average power absorbed per unit area at the Earth’s surface is 240Wm–2. By treating the...
• 14M.2.SL.TZ1.4f: Explain why the actual surface temperature of the Earth is greater than the value in (e).
• 14M.2.HL.TZ1.6c: Calculate, using the data given, the solar power incident per unit area at distance d from the Sun.
• 14M.2.HL.TZ1.6f: Explain why the actual surface temperature of the Earth is greater than the value in (e).
• 14M.2.HL.TZ1.6b: Deduce that the solar power incident per unit area at distance d from the Sun is given...
• 14M.2.HL.TZ1.6d: State two reasons why the solar power incident per unit area at a point on the surface of the...
• 14M.2.HL.TZ1.6e: The average power absorbed per unit area at the Earth’s surface is 240Wm–2. By treating the...
• 14M.2.HL.TZ1.6a: State the Stefan-Boltzmann law for a black body.
• 14N.1.SL.TZ0.28: The graph shows the emission spectrum for a black body at absolute temperature T1. Which graph...
• 14N.1.HL.TZ0.36: Changes in the climate are leading to a reduction in ice cover on Earth. Which of the following...
• 14N.1.HL.TZ0.37: The graph shows the emission spectrum for a black body at absolute temperature T1. Which graph...
• 11N.1.SL.TZO.26: In a nuclear fission reaction neutrons are passed through a moderator. The reason for this is to...
• 11N.1.SL.TZO.27: Wind of speed v is incident normally on a wind turbine of radius r. The maximum theoretical power...
• 11N.1.SL.TZO.28: Which of the following geographical features has the lowest albedo? A. Polar ice capB. DesertC....
• 11N.1.SL.TZO.30: Which of the following alternatives would be the most likely to increase the enhanced greenhouse...
• 12N.1.SL.TZ0.25: Which energy resource is renewable? A. Natural gasB. UraniumC. BiogasD. Coal
• 12N.1.SL.TZ0.26: For a black-body at absolute temperature T the power emitted per unit area is P. What is the...
• 13N.1.SL.TZ0.27: What is the main role of the control rods and the main role of the moderator in a thermal fission...
• 13N.1.SL.TZ0.29: The surface temperature of a black-body emitter is doubled. By what factor does the power emitted...
• 13N.1.HL.TZ0.37: Which option is not a possible solution to reduce the enhanced greenhouse effect? A....
• 13N.1.HL.TZ0.34: In the production of electric power, an advantage of using photovoltaic cells rather than fossil...
• 13N.1.SL.TZ0.26: In the production of electric power, an advantage of using photovoltaic cells rather than fossil...
• 13M.1.HL.TZ1.35: In a nuclear fission reactor, the role of the moderator is to A. absorb neutrons to shut down...
• 12M.1.SL.TZ2.24: Which of the following is the primary function of the moderator in a nuclear power station? A....
• 12M.1.SL.TZ2.29: Gases in the Earth’s atmosphere believed to be responsible for the greenhouse effect include A....
• 12M.1.SL.TZ1.27: The original source of the electrical power produced by a wind generator is A. the Sun’s...
• 12M.1.SL.TZ1.28: Increasing the temperature of a black-body will have the following effect on its emission...
• 12M.1.SL.TZ2.28: The property of the molecules of greenhouse gases which leads to their ability to absorb...
• 12M.1.SL.TZ1.26: In a nuclear power station, in order to increase the chances of a chain reaction A. kinetic...
• 13M.2.SL.TZ1.8a: (i) Outline, with reference to the energy conversions in the machine, the main features of a...
• 13M.2.SL.TZ1.8c: Distinguish between photovoltaic cells and solar heating panels.
• 13M.2.SL.TZ1.8e: The intensity of the Sun’s radiation at the position of the Earth’s orbit (the solar constant) is...
• 12M.1.SL.TZ2.26: The blades of a certain wind turbine X have radius r. The maximum theoretical available wind...
• 12M.1.HL.TZ2.34: The rate of formation of a non-renewable energy resource is A. greater than the rate of...
• 13M.2.SL.TZ2.9c: The average solar intensity incident at the surface of the Earth is 238 W m–2. (i) Assuming that...
• 11M.1.SL.TZ2.27: Which of the following processes leads to the...
• 11M.1.SL.TZ2.29: Surface X has a temperature TX and emissivity εx. Surface Y has a temperature TY and emissivity...
• 11M.1.SL.TZ2.30: Large areas of rainforests are cut...
• 13M.2.SL.TZ2.9a: A coal-fired power station has a power output of 4.0GW. It has been suggested that a wind farm...
• 13M.2.SL.TZ2.9b: Wind power does not involve the production of greenhouse gases. Outline why the surface...
• 11M.1.SL.TZ2.25: The Sankey diagram of a fossil-fuelled power station is shown...
• 11M.1.SL.TZ2.26: World energy resources include coal, nuclear fuel and...
• 11M.1.HL.TZ2.37: Which of the...
• 11M.1.HL.TZ2.34: World energy resources include...
• 13M.1.SL.TZ2.29: The graph shows the spectrum of a black-body. Which graph shows the spectrum of a body of...
• 12M.1.HL.TZ1.35: In a nuclear power station, in order to increase the chances of a chain reaction A. kinetic...
• 13M.1.SL.TZ2.25: The use of which energy source enhances the greenhouse effect the most? A. WoodB. CoalC. WindD....
• 13M.1.SL.TZ2.27: Which of the following correctly describes the energy transformation within photovoltaic cells...
• 13M.1.SL.TZ2.30: A student states that the following factors may lead to global warming I. decreased albedo of...
• 11M.2.SL.TZ2.6b: A nuclear power station uses...
• 11M.2.SL.TZ2.6e: The Drax power station...
• 11M.2.SL.TZ2.7b: Two plastic rods...
• 12M.2.SL.TZ2.8c: The radiant power of the Sun is 3.90 ×1026W. The average radius of the Earth’s orbit about the...
• 12M.2.SL.TZ2.8e: Assuming that the Earth’s surface behaves as a black-body and that no energy is absorbed by the...
• 12M.2.SL.TZ2.8d: Show, using your answer to (c), that the average intensity incident on the Earth’s surface is 242...
• 12M.2.SL.TZ2.8a: Distinguish, in terms of the energy changes involved, between a solar heating panel and a...
• 12M.2.SL.TZ2.8b: State an appropriate domestic use for a (i) solar heating panel. (ii) photovoltaic cell.
• 12M.2.SL.TZ1.2a: Explain why the power absorbed by the Earth...
• 12M.2.SL.TZ1.2b: The equation in (a) leads to the following expression which can be used to predict the Earth’s...
• 12M.2.SL.TZ1.4c: Air is incident normally on a wind turbine and passes through the turbine blades without changing...
• 12M.2.SL.TZ1.4a: Outline in terms of energy changes how electrical energy is obtained from the energy of wind.
• 12M.2.SL.TZ1.4e: Outline one advantage and one disadvantage of using wind turbines to generate electrical energy,...
• 12M.2.SL.TZ1.4b: Air of density ρ and speed v passes normally through a wind turbine of blade length r as shown...
• 12M.2.SL.TZ1.4d: A wind turbine has a mechanical input power of 3.0×105W and generates an electrical power output...
• 11N.2.SL.TZ0.3a: A nuclide of deuterium \(\left( {{}_{\rm{1}}^2{\rm{H}}} \right)\) and a nuclide of...
• 11N.2.SL.TZ0.8b: The graph shows the variation with frequency of the percentage transmittance of electromagnetic...
• 11N.2.SL.TZ0.8a: Describe what is meant by the greenhouse effect in the Earth’s atmosphere.
• 12N.2.SL.TZ0.7a: The Pobeda ice island forms regularly when icebergs run aground near the Antarctic ice shelf. The...
• 12N.2.SL.TZ0.7b: Suggest the likely effect on the average albedo of the region in which the island was floating as...
• 12N.2.HL.TZ0.8b: Outline why uranium ore needs to be enriched before it can be used successfully in a nuclear...
• 12N.2.HL.TZ0.8d: Some waste products in nuclear reactors are good absorbers of neutrons. Suggest why the formation...
• 13N.2.SL.TZ0.6f: Nuclear fuels, unlike fossil fuels, produce no greenhouse gases. (i) Identify two greenhouse...
• 13N.2.SL.TZ0.3a: State two advantages of power production using fossil fuels compared to using nuclear fuels.
• 11M.1.SL.TZ1.25: What is the phenomenon that best explains why greenhouse gases absorb infrared radiation? A....
• 11M.1.SL.TZ1.26: In which of the following places will the albedo be greatest? A. A forestB. A grasslandC. An...
• 11M.1.SL.TZ1.27: A wind turbine produces a power P when the wind speed is v. Assuming that the efficiency of...
• 11M.1.SL.TZ1.28: A spherical black body has absolute temperature T1. The surroundings are kept at a lower...
• 11M.1.SL.TZ1.29: The design of a nuclear power station includes an electrical generator. The function of the...
• 11M.2.SL.TZ1.4c: Explain what would happen if the moderator of this reactor were to be removed.
• 11M.2.SL.TZ1.4b: The reactor produces 24 MW of power. The efficiency of the reactor is 32 %. In the fission of one...
• 11M.2.SL.TZ1.4d: During its normal operation, the following set of reactions takes place in the...
• 11M.2.SL.TZ1.9b: The diagram shows a simplified model of the energy balance of the Earth’s surface. The diagram...
• 11M.2.SL.TZ1.9c: (i) Outline a mechanism by which part of the radiation radiated by the Earth’s surface is...
• 11M.2.SL.TZ1.9a: The intensity of the Sun’s radiation at the position of the Earth is approximately 1400 W...
• 09N.1.SL.TZ0.26: Which of the following is a renewable and non-renewable energy source?
• 09N.1.SL.TZ0.25: Which of the following energy sources results from the solar energy incident on Earth? A.   ...
• 17M.2.HL.TZ2.2c.iv: Not all the stored energy can be retrieved because of energy losses in the system. Explain two...
• 17M.2.HL.TZ2.2c.iii: The hydroelectric system has four 250 MW generators. Determine the maximum time for which...
• 17M.2.HL.TZ2.2c.ii: The water in a particular pumped storage hydroelectric system falls a vertical distance of 270 m...
• 17M.2.HL.TZ2.2c.i: Outline, with reference to energy changes, the operation of a pumped storage hydroelectric system.
• 17M.2.SL.TZ2.2d: At the location of the hydroelectric system, an average intensity of 180 W m–2 arrives at the...
• 17M.2.SL.TZ2.2c: Not all the stored energy can be retrieved because of energy losses in the system. Explain one...
• 17M.2.SL.TZ2.2b: The hydroelectric system has four 250 MW generators. The specific energy available from the water...
• 17M.2.SL.TZ2.2a: Outline, with reference to energy changes, the operation of a pumped storage hydroelectric system.
• 17M.2.SL.TZ1.3c.ii: Explain two reasons why the number of turbines required is likely to be greater than your answer...
• 17M.2.SL.TZ1.3c.i: Determine the minimum number of turbines needed to generate the same power as the solar farm.
• 17M.2.SL.TZ1.3b: A solar farm is made up of photovoltaic cells of area 25 000 m2. The average solar intensity...
• 17M.2.SL.TZ1.3a: Describe the difference between photovoltaic cells and solar heating panels.
• 17M.1.HL.TZ1.25: The average albedo of glacier ice is 0.25. What is...
• 17M.1.HL.TZ1.23: An object can lose energy through I.    conductionII.   convectionIII.  radiation What are the...
• 17M.1.SL.TZ2.29: A room is at a constant temperature of 300 K. A hotplate in the room is at a temperature of 400...
• 17M.1.SL.TZ2.28: The main role of a moderator in a nuclear fission reactor is to A.  slow down neutrons. B....
• 17M.1.SL.TZ1.30: The average surface temperature of Mars is approximately 200 K and the average surface...
• 17M.1.SL.TZ1.29: Planet X and planet Y both emit radiation as black bodies. Planet X has a surface temperature...
• 17M.1.SL.TZ1.28: The following are energy sources. I.    a battery of rechargeable electric cellsII.   crude...
• 17M.1.SL.TZ1.15: Two pulses are travelling towards each other. What is a possible pulse shape when the pulses...
• 16N.2.SL.TZ0.8d: Describe, in terms of energy transfers, how thermal energy of the burning gas becomes electrical...
• 16N.2.SL.TZ0.8c: Explain, using your answer to (b), why countries are being asked to decrease their dependence on...
• 16N.2.SL.TZ0.8b: Calculate the mass of CO2 generated in a year assuming the power station operates continuously.
• 16N.2.SL.TZ0.8a: Calculate, with a suitable unit, the electrical power output of the power station.
• 16M.2.HL.TZ0.9d: The average surface temperature of the Earth is actually 288 K. Suggest how the greenhouse...
• 16M.2.SL.TZ0.7b: The albedo of the atmosphere is 0.30. Deduce that the average intensity over the entire surface...
• 16M.2.SL.TZ0.7a: Show that the intensity of the solar radiation incident on the upper atmosphere of the Earth is...
• 16N.1.HL.TZ0.25: X and Y are two spherical black-body radiators that emit the same total power. The absolute...
• 16N.1.HL.TZ0.24: The solar constant is the intensity of the Sun’s radiation at  A. the surface of the Earth. B....
• 16N.1.SL.TZ0.29: Which of the following is not a primary energy source?  A. Wind turbine  B. Jet Engine  C....
• 16N.1.SL.TZ0.30: What are the principal energy changes in a photovoltaic cell and in a solar heating panel? 
• 16N.1.SL.TZ0.28: The Sankey diagram represents the energy flow for a coal-fired power station. What is the...
• 16M.1.SL.TZ0.30: A black body of surface 1.0m2 emits electromagnetic radiation of peak wavelength 2.90×10–6m....
• 16M.1.SL.TZ0.29: ...
• 16M.1.SL.TZ0.28: ...
• 10N.2.SL.TZ0.B3Part1.c: A nuclear power plant that uses U-235 as fuel has a useful power output of 16 MW and an...
• 10N.2.SL.TZ0.B3Part1.b: Outline the role of the moderator.
• 10N.2.SL.TZ0.B2Part2.b: (i)     Use the data to calculate the power output of the room heater, ignoring the power...
• 10N.2.SL.TZ0.B2Part2.a: Define the energy density of a fuel.
• 10N.1.SL.TZ0.30: The diagram shows an energy balance climate model for a planet. The intensities of the...
• 10N.1.SL.TZ0.28: The diagram shows the variation with wavelength of the power per unit wavelength \(I\) radiated...
• 10N.1.HL.TZ0.37: Which of the following statements, relating to the production of nuclear power, is correct? A. ...
• 10M.1.SL.TZ1.30: Which of the following is most likely to reduce the enhanced greenhouse effect? A.     Replace...
• 10M.1.SL.TZ1.29: The albedo for the oceans is lower than that for glaciers. This is because, compared to ice, sea...