1. Johnny walked out of an air-conditioned room on a hot day. A mist formed on his spectacles and made him see things unclearly.
(a) Explain how the mist formed on Johnny's spectacles.
(b) After some time the mist disappeared. Why?
2. Two identical wet towels, A and B, are hung.
(a) Which towel will dry first? Explain your answer.
(b) State THREE other conditions that will make the towels dry faster.
Science questions
2007-03-16 3:52 am
回答 (1)
2007-03-17 9:12 pm
✔ 最佳答案
2.(a) B towel will dry first. It is because a larger surface are increases the rate of evaporation.
(b) The air is moving. The temperature is high. The humity is low.
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