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Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.
--------- physicist, Gabriel Fahrenheit, invented the mercury thermometer in 1741. (fill in the blanks)
Match the following (a) Laboratory Thermometer (i) Avoids use of mercury (b) Clinical Thermometer (ii) To measure the boiling point of water (c) Digital Thermometer (iii) To check the temperature of atmosphere around (d) Maximum Minimum Thermometer (iv) To check body temperature
A centigrade and Fahrenheit thermometers are dipped in boiling water. The water temperature is lowered until the Fahrenheit thermometer registers 140°. What is the fall in temperature registered by the centigrade thermometer?
A Kelvin thermometer and a Fahrenheit thermometer both give the same reading for a certain sample. What would be the corresponding reading in a Celsius thermometer?
Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of __________ as mercury does not amalgamate with it.
Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of __________ as mercury does not amalgamate with it.
The coefficient of volumetric expansion of mercury is 18×10-5/°C. The thermometer bulb has a volume of 10-6 m3 and cross-section of the stem is 0.002cm2. Assuming that bulb is filled with mercury at 0°C, the increase in length of the mercury column at 100°C will be ___________
Shehnaz has to record temperature of a covid-19 patient in Celsius but hard thermometer reads Fahrenheit. The patient's temperature is 100.7° Fahrenheit. What is the temperature in Celsius?
With reference to street-lighting, how do Mercury vapour lamps differ from LED lamps? 1. Mercury vapour lamps use a fraction of the energy used in the case of LED lamps. 2. LEDs have a lower radiance than mercury arc lamps.  3. Mercury lamps are eco-friendly as they require low voltages than LED lamps to operate. Select the correct answer using the code given below.