Physics 分析区

ultikiller

那potential difference的definition要怎样写？

ultikiller

原帖由 sunsilk_cv 于 2-12-2009 03:08 PM 发表
你那个图跟我的题目一样,
问题就是compare the surface curvature of (a) and (b)

那是不是(a)大过(b)??

你是指那一大？如果是focal length 的话就是(a)大过(b)

sunsilk_cv

不好意思～scan机sot 了～ 本来要拍上来，可是今天的line有点慢，upload不到

就是11的(a)和(b)
题目跟图片一样..
然后问题是
(i)Compare the surface curvature of (a)和(b)
(ii)State qualitatively the relationship between the surface curvature of the mirrors and their focal lengths.

cdef

原帖由 ultikiller 于 2-12-2009 03:19 PM 发表
那potential difference的definition要怎样写？

the work done driving one coulomb of charge from one point to another point

皇后人

A = In deep water.
B = In shallow water. The elliptical movement of a surface particle becomes flatter with decreasing depth.
1 = Progression of wave
2 = Crest
3 = Trough

可以帮忙解释下下吗？
我不是很明白....

皇后人

wave的那课....

ultikiller

原帖由 sunsilk_cv 于 2-12-2009 03:29 PM 发表
不好意思～scan机sot 了～ 本来要拍上来，可是今天的line有点慢，upload不到

就是11的(a)和(b)
题目跟图片一样..
然后问题是
(i)Compare the surface curvature of (a)和(b)
(ii)State qualitatively ...

你upload 到photobucket

ultikiller

原帖由 皇后人 于 2-12-2009 03:37 PM 发表


A = In deep water.
B = In shallow water. The elliptical movement of a surface particle becomes flatter with decre ...

请问下你是自己画出来的？

sunsilk_cv

就是photobucket很慢

sunsilk_cv

nvm...我晚点再upload上来，我先读别的课
谢谢帮助

ultikiller

原帖由 sunsilk_cv 于 2-12-2009 03:43 PM 发表
就是photobucket很慢

那你用imageshack

http://imageshack.us/

皇后人

原帖由 ultikiller 于 2-12-2009 03:42 PM 发表


请问下你是自己画出来的？

不是的
上网查资料
看到这张图....
不是很明白就放上来....

ultikiller

A = In deep water.(在深水）
B = In shallow water. （在浅水）The elliptical movement of a surface particle becomes flatter with decreasing depth.（当减少深度,粒子表面的像椭圆形的移动就会变成扁平）
1 = Progression of wave（波的进程）
2 = Crest（波峰）
3 = Trough（海槽)

皇后人

想问一下下
gap越小wavelength越大？
还是gap越小wavelength越小？

皇后人

了解一点点......

ultikiller

原帖由 cdef 于 2-12-2009 03:34 PM 发表


the work done driving one coulomb of charge from one point to another point

coulomb 的SI Unit是什么？

-小麦-

请问你们会做这题吗？
The diagram shows a boy appearing shorter when he is in a swimming pool.The depth of the water in the pool is 1.2m.
The refractive index of water is 1.33
What is the apparent depth of the pool?

-小麦-

The pressure of sea water at the bottom of an ocean is 1.3x10^8Nm^-2.What is the depth of the ocean?{density of sea water=1.02x10^3kgm^-3}
How 2 do?

-小麦-

C right or not?

ultikiller

原帖由 皇后人 于 2-12-2009 04:02 PM 发表
了解一点点......

根据boyle's law, the pressure of a fixed mass of a gas is inversely proportional to the volume of the gas, provided the temperature of the gas is constant.
也就是说，当一个潜水员越靠近表面，他所发出的气泡的形状就越大。相对的，当一个潜水员潜的越深，他所发出的气泡的形状就越小。因为压力增加了！