1. P1 Physics

2. 1. Hot objects emit... 1.More infra-red radiation 2.Less infra-red radiation 3.Less electrons 4.More neutrons Response Grid Countdown 10

3. 2. Which surfaces are the best absorbers and emitters of IR radiation? 1.Light, shiny surfaces 2.Dark, shiny surfaces 3.Dark, matt surfaces 4.Light, matt suraces Response Grid Countdown 10

4. 3. Which surfaces are the best reflectors of IR radiation? 1.Light, shiny surfaces 2.Dark, shiny surfaces 3.Dark, matt surfaces 4.Light, matt suraces Response Grid Countdown 10

5. 4.Water can exist in the following states. Which has the most energy? 1.Solid 2.Liquid 3.Gas 4.Texas Response Grid Countdown 10

6. 5. Which of the following energy transformations can only occur in solids? 1.Evaporation 2.Radiation 3.Convection 4.Conduction Response Grid Countdown 10

7. 6. What characteristic does not affect the rate of energy transfer by heating? 1.Temperature difference 2.Material 3.Surface area and volume 4.Time Response Grid Countdown 10

8. 7. What is a U value? 1.A measure of how well a building transfers heat 2.The lowest temperature possible 3.A measure of the permittivity of free space 4.A description of the colour and texture of a surface Response Grid Countdown 10

9. 8. What doesn't a solar panel do? 1.Provides electricity to homes 2.Provides hot water to buildings 3.Provides heating to buildings 4.Reduces energy bills for a building Response Grid Countdown 10

10. 10. What is the law of conservation of energy? 1.Energy can only be wasted through heat 2.Energy cannot be created or destroyed, only changed 3.Power is the rate of change of energy 4.Energy is transferred from a high concentration of a low concentration through a semi- permeable membrane Response Grid Countdown 10

11. 11. What is the efficiency calculation? 1.input / output 2.output / input 3.useful / input 4.total useful / total wasted Response Grid Countdown 10

12. 12. What is the energy transfer diagram for a remote control? 1.Chemical -> Light 2.Electrical -> Electrical 3.Electrical -> Light 4.Gravitational -> Kinetic Response Grid Countdown 10

13. 13. A 800 W microwave heats a bowl of soup on full power for 2 minutes. How much energy does it use? 1.1600 J 2.400 J 3.0.15 J 4.96 000 J Response Grid Countdown 10

14. 14. How many joules in a kilo-watt- hour? 1.3.6 MJ 2.3.6 kJ 3.3.6 TJ 4.3.6 J Response Grid Countdown 10

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16. 15. What device allows us to generate most of our electricity 1.Resistor 2.Capacitor 3.Boiler 4.Generator Response Grid Countdown 10

17. 16. Which energy resources are not renewable? 1.Nuclear 2.Geothermal 3.Tidal 4.Solar Response Grid Countdown 10

18. 17. What is the highest voltage carried by the national grid? 1.275 kV 2.400 kV 3.230 V 4.132 kV Response Grid Countdown 10

19. 18. What is never true about waves? 1.They can be longitudinal or transverse 2.They carry energy or information 3.They need a medium to travel through 4.They travel at over 300 000 000 m/s Response Grid Countdown 10

20. 19. What does the image show? 1.Reflection 2.Refraction 3.Diffraction 4.Total internal reflection Response Grid Countdown 10

21. 20. What is the wave equation for wave speed? 1.frequency x wavelength 2.distance / time 3.frequency x distance 4.time / wavelength Response Grid Countdown 10

22. 21. Which region has the shortest wavelength? 1.Gamma 2.Radio 3.Infra-red 4.Microwave Response Grid Countdown 10

23. 22. Relative to the normal, what is the angle of reflection equal to? 1.The angle of refraction 2.The angle of incidence 3.The angle of diffraction 4.The angle perpendicular to the normal Response Grid Countdown 10

24. 23. What feature is not present in the image created by a plane mirror? 1.Virtual 2.Upright 3.Laterally inverted 4.Enlarged Response Grid Countdown 10

25. 24. What feature of a sound wave determines its loudness? 1.Frequency 2.Pitch 3.Amplitude 4.Wavelength Response Grid Countdown 10

26. 25. What is the change in observed wavelength caused by relative movement called? 1.Doppler effect 2.Refraction 3.Condensation 4.Red shift Response Grid Countdown 10

27. 26. What is the observed increase in wavelength of distance galaxies called? 1.Doppler effect 2.Refraction 3.Condensation 4.Red shift Response Grid Countdown 10

28. 27. What does the observed red shift provide evidence for? 1.Evolutionary theory 2.Particle theory 3.Germ theory 4.Big Bang theory Response Grid Countdown 10

29. 28. What evidence is there for CMBR? 1.Galaxies are all moving away from one another 2.Temperature of space is not 0 3.Stars spin on their axes too quickly 4.The Milky Way galactic year is 250 000 000 years Response Grid Countdown 10

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