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What element is used in a flash guns?
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Strontium produces what colour in fireworks??
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What type of weapon is a Lee-Enfield?
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Which scientist won the Nobel Prize for his discovery of photoelectric effect?
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For what purpose would a doctor use a sphygmomanometer?
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What term describes an up-ward-growing column of calcium carbonate wich forms on the floorsof caves etc?
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In radiation wavelenght measurement, radio rays are the longest. What are the shortest?
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If a cathode is a negative electrode, what is a positive electrode?
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