The two common liquids used in liquid-in-glass thermometers are alcohol (ethanol) and mercury, which have melting points and boiling points of -114 C, 79 C and -39 C, 357 C, respectively.
Mercury has a greater coefficient of thermal expansion than alcohol.
Explaination:
This means a column of mercury will expand and rise more than a column of alcohol for the same temperature change. ... However, clinical mercury thermometers are on the decline. Mercury is poisonous, and a broken thermometer in the mouth is not good.
an Aeroplane which was about to land from a height of Aeroplane 1000 m above the ground level. Chandrakant was standing at a point-c on the runway such that his line of sight was at an angle of 60 degree from the horizontal level ie runway. ( Assuming his height negligible).If Chandrakant moves towards point B, Then angle of elevation of the Aeroplane willA. IncreaseB. DecreaseC. Remain SameD. None of the above