state the temperature shown in upper and lower thermometer in hope's apparatus
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Hope's apparatus
As the water in the central part of the vessel cools towards 4 °C (39 °F) (and thus becomes denser) it sinks to the bottom of the vessel, displacing the warmer water. The lower thermometer will then read a constant 4 °C (39 °F).
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Two thermometers, one above and one below the trough, measure the temperature of the water. It is designed to demonstrate that water reaches its maximum density at 4 °C (39 °F). ... The lower thermometer will then read a constant 4 °C (39 °F).
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