[问答题]
A student investigates gas behaviour. A volume of gas is trapped in a capillary tube by a thin layer of oil. The tube, a thermometer and a ruler are immersed in water.
The student slowly added boiling water and recorded the values of the temperature T of the water and the height h of the gas trapped inside the capillary tube. The recorded data is plotted on a graph as shown.
1.Draw the best fit line for the graph plotted data.
2.The theory suggests that$h=mT+C$
where m and C are constant. Temperature T is in ${\circ}C$
1.Suggest whether the data are consistent with the theory.
2.By using the graph drawn in (a), determine the constants $m$ and $C$.
3.State the units of the gradient in fundamental SI units.
3.Following the experiment, the student tested their thermometer in an ice bath and in boiling water. The temperatures were $2^{\circ}C$ and $102^{\circ}C$ respectively.
1.Explain how this finding will affect how the student interprets their results.
2.The student also goes on to find the intercept on the temperature axis. Will this error cause their intercept value to be higher or lower than expected?
