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Question: What do you mean by Celsius ?

Answer:

Temperature is usually measured in degrees Celsius. The Celsius temperature scale was previously known as the centigrade scale. The degree Celsius (symbol: °C) can refer to a specific temperature on the Celsius scale as well as serve as a unit increment to indicate a temperature interval (a difference between two temperatures or an uncertainty). Celsius is named after the Swedish astronomer Anders Celsius (1701–1744), who developed a similar temperature scale.

For example water boils at 100°C and freezes at 0°C. The normal human body temperature is about 37°C.

The acre is often used to express areas of land. In the metric system, the hectare is commonly used for the same purpose. An acre is approximately 40% of a hectare. One acre is 90.75 yards of a 53.33 yard wide American football field. The full field, including the end zones, covers approximately 1.32 acres.