phy: 1)stop緊會唔會有friction?
2)點樣measure focal length?
3)focal length 大d會令image 有咩改變?
4)nuclear fission 會唔會release radiation?
chem: 1) barium hydroxide係咪soluble?
econ: 1) voluntary work 計唔計落GDP?
會考...唔識~~help please
2007-04-06 6:16 am
回答 (2)
2007-04-06 9:37 am
✔ 最佳答案
phy 1) 唔明你stop 緊o係定義....... 係 going to stop 定話remain stationary如果係going to stop , 一定有(include air resistance)
如果係remain stationary, 可以有,亦都可以冇,
2) do experiment which vary the distance between the eyes and the lens until the fine image is observed. Draw the result on graph paper and fine the focal length.
3) 視乎你放個object o係幾遠先
4)會
chem 1)係
econ: 冇修
2007-04-07 1:28 am
econ: 1) voluntary work 計唔計落GDP?
involve production but no market value
so唔計
involve production but no market value
so唔計
收錄日期: 2021-04-12 19:15:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070405000051KK04623