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Return to Energy Systems and Sustainability 3e Student Resources
Chapter 4 Multiple choice questions
Quiz Content
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Section 4.2 describes kinetic and potential energy. In gravitational potential energy terms, roughly how large is a joule?
A 0.1 kg apple moved upwards through 1 metre.
correct
incorrect
A 1 kg weight moved upwards through 1 metre.
correct
incorrect
A pound weight moved upwards through 1 foot.
correct
incorrect
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Kinetic energy is energy due to motion. If the speed of an object doubles, by how much does its kinetic energy change?
It doubles.
correct
incorrect
It increases by a factor of 4.
correct
incorrect
It increases by a factor of 8.
correct
incorrect
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Box 4.2 describes the potential power from a wind turbine. If the wind speed was to double, by how much would the power in the wind increase?
A factor of 2
correct
incorrect
A factor of 4
correct
incorrect
A factor of 8
correct
incorrect
A factor of 10
correct
incorrect
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Section 4.3 describes heat energy. How many kilojoules of heat are required to make a 0.3 kg cup of coffee? Box 4.4 gives the specific heat of water as 4200 joules per kilogram per kelvin (or degree C). Roughly how many kilojoules of heat are needed to raise 0.3 kg of water from room temperature, 20 degrees C, to 100 degrees C (but without boiling it)?
20 kJ
correct
incorrect
100 kJ
correct
incorrect
1000 kJ
correct
incorrect
2000 kJ
correct
incorrect
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Section 4.4 describes electrical energy. What is the formula relating electrical resistance, R, to the applied voltage, V, and the current, I?
R = V ⨯ I
correct
incorrect
R = V / I
correct
incorrect
R = V
2
+ I
correct
incorrect
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not completed
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What is the formula relating electrical power, P, to voltage, V, and current, I?
P = V
2
+ I
correct
incorrect
P = V / I
correct
incorrect
P = V ⨯ I
correct
incorrect
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Electromagnetic radiation is described in Section 4.5. A certain photocell is only sensitive to radiation whose wavelength is less than 0.8 micrometres. In which part of the spectrum is that wavelength?
Ultraviolet
correct
incorrect
Visible light
correct
incorrect
Infrared
correct
incorrect
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Section 4.6 describes chemical energy. The periodic table arranges different elements in columns with similar chemical properties. Which element is immediately below carbon in the table?
Oxygen (O)
correct
incorrect
Sulfur (S)
correct
incorrect
Silicon (Si)
correct
incorrect
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Box 4.9 in Section 4.6 describes the combustion of a fuel. Propane is a gaseous fuel similar to methane. A propane molecule consists of three carbon and eight hydrogen atoms. An oxygen molecule contains two atoms.
How many molecules of oxygen will be needed for the complete combustion of one molecule of propane?
3
correct
incorrect
4
correct
incorrect
5
correct
incorrect
6
correct
incorrect
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Section 4.6 also describes the nuclear atom and isotopes. A carbon 13 nucleus is heavier than a carbon 12 nucleus. What makes up the weight difference?
An extra neutron
correct
incorrect
An extra proton
correct
incorrect
Many more electrons
correct
incorrect
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