問題都是有關latent heat 同 evaporation
(1) Explain how we can determine the direction of a breeze by wetting our finger and holding it up in the air.
(2) Farmers in cold countries spray fruit trees with water before a frost to protect their fruits from freezing. Explain how this method works.
2題物理題(中三)
2007-04-05 11:24 pm
回答 (1)
2007-04-06 1:49 am
✔ 最佳答案
(1) 手上水珠會跟風向流動, 同時, 係風的源頭的那一邊的水是會俾另一邊快d乾的.(想像一下您去完厠所之後用吹風機乾的情況吧.)
(2) 噴完水會立即結冰, 就好似幫d生果著左件衫, 防止d風雪再進一步降低生果的溫度. 有左層冰("件衫")就只會保持這個溫度.
參考: me
收錄日期: 2021-04-13 00:16:11
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070405000051KK02182