WAEC Physics 2011 Theory — Question 18
Question 18 of 39 from the West African Examinations Council (WAEC) Physics 2011 Theory paper, with the correct answer and a full explanation.
Advertisement
12(a)(i) Advantages of alcohol over mercury as a thermometer liquid.
Model answer
(I) Alcohol has a lower freezing point of -114°C (mercury freezes at -38.8°C) and thus can be used for measuring very low temperatures. (II) Expansivity: the expansivity of alcohol is about six times that of mercury for the same temperature rise. (III) Alcohol is cheaper than mercury.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.