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Answers
These gaps which are of the order of a few millimeters, are provided to allow room for the rails to expand the rise in temperature due to the atmospheric temperature as well as the friction caused by running of train. ... So that there is enough margin for the tracks to expand and contract due to the temperature changes.
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Explanation:
ans 1) A clinical thermometer is a thermometer used to measure human body temperature. Most made in the 20th century are mercury-in-glass thermometers. They are accurate and sensitive, having a narrow place where the mercury level rises very fast. ... Medical thermometers are cleaned before and after each use, with alcohol.
Differences: Clinical thermometer is used to measure body temperature however laboratory thermometer is not used for the purpose of measuring body temperature. The temperature range of clinical thermometers is 35°C-42°C and that of laboratory thermometers is -10°C-110°C.
ans 2) Heat and temperature are related to each other, but are different concepts. Heat is the total energy of molecular motion in a substance while temperature is a measure of the average energy of molecular motion in a substance. ... Temperature does not depend on the size or type of object.
Heat measures both kinetic and potential energy contained by molecules in an object. On the other hand, temperature measures average kinetic energy of molecules in substance. ... The standard unit of measurement of heat is Joules, while that of temperature is Kelvin, but it can also be measured in Celsius and Fahrenheit.
ans 3) A calorimeter is a container, which is insulated against heat loss, and contains a liquid of known specific heat capacity, c (usually water) in which the chemical reaction takes place.
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ans 4) These gaps which are of the order of a few millimeters, are provided to allow room for the rails to expand the rise in temperature due to the atmospheric temperature as well as the friction caused by running of train. ... So that there is enough margin for the tracks to expand and contract due to the temperature changes