Electromagnetic radiation emitted from unstable nuclei in radioactive substances.
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Gamma ray
The highest energy wave in the electromagnetic spectrum.
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Gas
A state of matter.
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Generator
A machine that produces a voltage.
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Geothermal energy
Energy from hot underground rocks.
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Gravitational attraction
Force that pulls two masses together.
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Gravitational field strength (g)
The force of gravity on an object of mass 1kg (in newtons per kilogram, N/kg).
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Gravitational potential energy
Energy of an object due to its position in a gravitational field. Near the Earth's surface, change of GPE (in J) = weight (in N) x vertical distance moved (in m).
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Half-life (of a radioactive isotope)
Average time taken for the number of nuclei of the isotope (or mass of the isotope) in a sample to halve.
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Hooke's law
The extension of a spring is directly proportional to the force applied, provided its limit of proportionality if not exceeded.
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Hydraulic pressure
The pressure in the liquid in a hydraulic arm.
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Other cards in this set
Card 2
Front
Gamma ray
Back
The highest energy wave in the electromagnetic spectrum.
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