1. Cosmic radiations from the sun
2. radio isotopes in the earth rocks.
3. nuclear fallout from nuclear tests.
4. Nuclear wastes from nuclear power stations.
chrispohmomanyi answered the question on October 5, 2017 at 09:47
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Explain what is meant by background radiation.
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October 5, 2017
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State two applications of moments.
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October 5, 2017
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Explain how wavelength varies with depth of water in a tank of variable length.
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October 5, 2017
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October 4, 2017
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October 4, 2017
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October 4, 2017
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State the condition under which a converging lens is used as a magnifying glass.
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October 4, 2017
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State two ways of increasing the size of the image in a pinhole camera.
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October 4, 2017
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State the type of wave produced when a wire fixed at both ends is jerked.
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October 4, 2017
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October 4, 2017
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October 4, 2017
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October 4, 2017
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October 4, 2017
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October 4, 2017
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October 4, 2017
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State two changes you would make in a mercury thermometer so that it can measure temperature accurately.
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October 4, 2017
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