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Physics

P1. Physics. 1. Hot objects emit. More infra-red radiation Less infra-red radiation Less electrons More neutrons. Response Grid. 10. Countdown. 2. Which surfaces are the best absorbers and emitters of IR radiation?. Light, shiny surfaces Dark, shiny surfaces Dark, matt surfaces

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Physics

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  1. P1 Physics

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

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

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

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

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

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

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

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

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

  11. 11. What is the efficiency calculation? • input / output • output / input • useful / input • total useful / total wasted Response Grid 10 Countdown

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

  13. 13. A 800 W microwave heats a bowl of soup on full power for 2 minutes. How much energy does it use? • 1600 J • 400 J • 0.15 J • 96 000 J Response Grid 10 Countdown

  14. 14. How many joules in a kilo-watt-hour? • 3.6 MJ • 3.6 kJ • 3.6 TJ • 3.6 J Response Grid 10 Countdown

  15. Participant Scores

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

  17. 16. Which energy resources are not renewable? • Nuclear • Geothermal • Tidal • Solar Response Grid 10 Countdown

  18. 17. What is the highest voltage carried by the national grid? • 275 kV • 400 kV • 230 V • 132 kV Response Grid 10 Countdown

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

  20. 19. What does the image show? • Reflection • Refraction • Diffraction • Total internal reflection Response Grid 10 Countdown

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

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

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

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

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

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

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

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

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

  30. Participant Scores

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