p1 physics. 1. hot objects emit... 1.more infra-red radiation 2.less infra-red radiation 3.less...
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P1
Physics
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1. Hot objects emit...
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1. More infra-red radiation
2. Less infra-red radiation
3. Less electrons
4. More neutrons
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2. Which surfaces are the best absorbers and emitters of IR radiation?
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1. Light, shiny surfaces
2. Dark, shiny surfaces
3. Dark, matt surfaces
4. Light, matt suraces
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3. Which surfaces are the best reflectors of IR radiation?
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1. Light, shiny surfaces
2. Dark, shiny surfaces
3. Dark, matt surfaces
4. Light, matt suraces
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4.Water can exist in the following states. Which has the most energy?
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1. Solid
2. Liquid
3. Gas
4. Texas
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5. Which of the following energy transformations can only occur in solids?
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1. Evaporation
2. Radiation
3. Convection
4. Conduction
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6. What characteristic does not affect the rate of energy transfer by heating?
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1. Temperature difference
2. Material
3. Surface area and volume
4. Time
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7. What is a U value?
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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
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8. What doesn't a solar panel do?
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1. Provides electricity to homes
2. Provides hot water to buildings
3. Provides heating to buildings
4. Reduces energy bills for a building
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10. What is the law of conservation of energy?
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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
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11. What is the efficiency calculation?
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1. input / output
2. output / input
3. useful / input
4. total useful / total wasted
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12. What is the energy transfer diagram for a remote control?
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1. Chemical -> Light
2. Electrical -> Electrical
3. Electrical -> Light
4. Gravitational -> Kinetic
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13. A 800 W microwave heats a bowl of soup on full power for 2 minutes. How much energy does it use?
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1. 1600 J
2. 400 J
3. 0.15 J
4. 96 000 J
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14. How many joules in a kilo-watt-hour?
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1. 3.6 MJ
2. 3.6 kJ
3. 3.6 TJ
4. 3.6 J
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15. What device allows us to generate most of our electricity
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1. Resistor
2. Capacitor
3. Boiler
4. Generator
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16. Which energy resources are not renewable?
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1. Nuclear
2. Geothermal
3. Tidal
4. Solar
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17. What is the highest voltage carried by the national grid?
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1. 275 kV
2. 400 kV
3. 230 V
4. 132 kV
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18. What is never true about waves?
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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
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19. What does the image show?
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1. Reflection
2. Refraction
3. Diffraction
4. Total internal reflection
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20. What is the wave equation for wave speed?
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1. frequency x wavelength
2. distance / time
3. frequency x distance
4. time / wavelength
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21. Which region has the shortest wavelength?
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1. Gamma
2. Radio
3. Infra-red
4. Microwave
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22. Relative to the normal, what is the angle of reflection equal to?
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1. The angle of refraction
2. The angle of incidence
3. The angle of diffraction
4. The angle perpendicular to the normal
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23. What feature is not present in the image created by a plane mirror?
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1. Virtual
2. Upright
3. Laterally inverted
4. Enlarged
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24. What feature of a sound wave determines its loudness?
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1. Frequency
2. Pitch
3. Amplitude
4. Wavelength
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25. What is the change in observed wavelength caused by relative movement called?
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1. Doppler effect
2. Refraction
3. Condensation
4. Red shift
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26. What is the observed increase in wavelength of distance galaxies called?
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1. Doppler effect
2. Refraction
3. Condensation
4. Red shift
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27. What does the observed red shift provide evidence for?
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1. Evolutionary theory
2. Particle theory
3. Germ theory
4. Big Bang theory
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28. What evidence is there for CMBR?
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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
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