Which persons glasses will be useful in starting a fire

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Q. A cylindrical container 1.1 tall contains mercury to a certain depth. The rest of the cylinder is filled with water.If the pressure at the bottom of the cylinder is two atmospheres, what is the depth?

Q. Two people who wear glasses are camping. One of them is nearsighted and the other is farsighted. Which person's glasses will be useful in starting a fire with the sun's rays?

Reference no: EM1351174

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