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What is thermometry?

Thermometry The branch of heat relating to the measurement of the temperature of a body is called thermometry. The thermometer is an instrument used to measure the temperature of a body. The essential requisites of a thermometer are given as under:  1) Construction, 2) Calibration, and 3) Sensitiveness. For the construction of a thermometer, the proper choice of a substance, whose physical property varies uniformly with rising in temperature, is essential. 1) Construction The physical property of a substance plays an important role in the construction of a thermometer. In a mercury thermometer, the principle of expansion of mercury with rising temperature is used. The platinum resistance thermometer is based on the principle of the change in resistance with a change in temperature. The gas thermometer is based on the principle of change in volume or pressure with a change in temperature. 2) Calibration  When a thermometer is constructed, it should be properly calibrated. The standa

What do you understand by anaerobic respiration?

What do you understand by anaerobic respiration?

The respiration which occurs in absence of oxygen is called anaerobic respiration. In anaerobic respiration, respiratory substances being partially oxidized with the help of enzymes, produce different types of organic compounds (ethyl alcohol, lactic acid, etc), CO2 and a small amount of energy. Only in some microorganisms such as bacteria, yeast, etc. anaerobic respiration occurs.


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