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HEAT, , Answer the following question., 1. State similarities and difference between the laboratory thermometer and the clinical thermometer., Ans:. Similarities , 1. Both consists of long narrow uniform glass tube., , 2. Both have a bulb at one end., , 3. Bith contain mercury in bulb., , 4. Bith use Celsius scale on the glass tube., , Difference :, 1. Aclinical thermometer reads temperature 35°C to 42°C while range of laboratory, thermometer is -10°C to 110°C., , 2. Clinical thermometer has a kink near the bulb while there is no kink in the laboratory, thermometer., , 3. Clinical thermometer is used to measure human body temperature while laboratory, thermometer is used in laboratory., , 2. What do you understand by radiation?, , Ans:. The process through which we get heat energy from the sun is known as radiation. It can, travel through space and hence does not required a medium for transmission., , 3. Explain the followings, , a) Thermometer :-. It is a device that can be used to find out how hot an object is. In other words,, we used a Thermometer to measure the temperature of an object., , b) Conduction :-. The mode of transfer of heat from hotter part of a meterial to its colder part or, from a hot material to a cold material in contact with it without the movement of material is known as, Conduction.In solids, heat is transfered by the process of the conduction., , c) Convection:-. The mode of transfer of heat from the hotter parts of a liquid or gases to its colder, parts by the movement of liquid or gases itself is known as Convection. The transfer of heat by, convection can take place only in liquid and gases. It is due to the reason that the particles in liquids and, gases can move about freely.