Forces always occur[a]If an object exerts a force on another object,the second object will exert an equal but[ b]force on the first object. These forces are called[c]
&[d] They act on two different bodies and are in[e]directions.An object can move forwards by ejecting something[f].Rockets work on this principle.
The fuel for rockets can be in[g]&[h]forms.
科學英文填充
2006-12-31 10:29 pm
回答 (3)
2006-12-31 10:52 pm
✔ 最佳答案
Forces always occur [a] in pairs. If an object exerts a force on another object, the second object will exert an equal but [ b] opposite force on the first object. These forces are called [c] action & [d] reaction. They act on two different bodies and are in [e] opposite directions. An object can move forwards by ejecting something [f] backwards. Rockets work on this principle. The fuel for rockets can be in [g] liquid & [h] gas forms.
2006-12-31 10:43 pm
a,apporsamately
b,firsthand
c,firsthand force
d,power force
e,opposite
f,awaking
g,fire
h,carbonates
b,firsthand
c,firsthand force
d,power force
e,opposite
f,awaking
g,fire
h,carbonates
參考: IS Book (F.1)
2006-12-31 10:31 pm
好簡單姐..自己做啦....小朋友...................
收錄日期: 2021-04-12 18:26:11
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061231000051KK02092