Write two reasons for using mercury in a thermometer ️️​

Mercury is found in thermometer because it doesn't stick to the glass tube.it expands on providing heat to it. It has lower freezing point and higher boiling point. It is a shining metal and when it expands the expansion can be easily seen.

my first reason is that Mercury is the only one in liquid state at room temperature and thermometers because it has high coefficient of expansion . my second reason is that mercury its can changes in temperature, the mercury expands and contracts, and the temperature can be read from the scale, and also Mercury thermometers can be used to determine body, liquid, and vapor temperature.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.