Yeah right I think I wrote sth stupid in physics exam, a 6 marks question asking how to determine absolute zero. I never revise it as it only occupies such a tiny space in the book and I never pay attention to it.
I put down use a kelvin thermometer and a Celsius thermometer to measure the temperature of a fixed amount of gas respectively.... then work out the difference....the subtract the difference from 0......
Bull****. If a kelvin thermometer is based on the concept of absolute zero...then what is the point to use it to determine absolute zero... I rethink after the exam and feel the answer is stupid...
I did also put down absolute zero is when the mean kinetic energy of all gas molecules becomes zero so does their root mean square speed is zero so it's actually impossible. And the experiment should be carried at constant pressure with a fixed mad and volume of gas. Take repeats and average. Honestly how many marks will I lose for this question I feel so regretful and scared