A constant volume gas thermometer shows pressure readings of `50 cm` and `90 cm` of mercury at `0^(0)C` and `100^(0)C` respectively. What is the temperature on gas scale when the pressure reading is `60 cm` of mercury ?
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Given that `P_(0) = 50cm` of `Hg,P_(100) = 90 cm` of `Hg`
`P_(t) = 60 cm` of `Hg`
`t = (P_(1) – P_(2))/(P_( 100) – P_(0)) xx 100 = (60 – 50)/(90 – 50) xx 100 = 25^(@)C`