A platinum resistance thermometer has a resistance of $20 \Omega$ at $0^\circ C$ and $25 \Omega$ at $100^\circ C$. If its resistance is measured to be $24 \Omega$ when placed in a hot bath, what is the temperature of the bath, assuming a linear relationship between resistance and temperature?

A pyrometer is calibrated to measure temperatures in the range of 500°C to 2500°C. Which of the following is NOT a valid reason for choosing a pyrometer over a thermocouple in this temperature range?

A constant volume gas thermometer shows pressure readings of $P_1$ at the triple point of water and $P_2$ at the boiling point of water at 1 atm. What is the ideal gas temperature corresponding to a pressure reading of $2P_1$?

Which of the following properties of materials is NOT utilized in temperature measurement devices?

A platinum resistance thermometer has a resistance of $20 \Omega$ at $0^\circ C$ and $25 \Omega$ at $100^\circ C$. If its resistance is measured to be $24 \Omega$ when placed in a hot bath, what is the temperature of the bath, assuming a linear relationship between resistance and temperature?

A thermocouple using iron and copper produces an emf of $E_1$ when its junctions are kept at $0^\circ C$ and $100^\circ C$. If the cold junction is kept at $-20^\circ C$ and the emf is $E_2$, what is the temperature of the hot junction?