作者ttttted (Hugo!!!)
看板Physics
标题[题目] 电场与热
时间Mon Jun 4 23:18:03 2012
[题目]
A cube of water 10cm on a side is placed in a microwave beam having
E0=10kV/m . The microwaves illuminate one face of the cube, and the water
absorbs 82% of the incident energy.
How long will it take to raise the water temperature by 42度C? Assume that
the water has no heat loss during this time.
[瓶颈] (写写自己的想法，方便大家为你解答)
这是我这一次masteringphysics的作业题目，答案是160，我看到热我就用
H=ms(deltaT)来代，但我不知道产生的热要怎麽表示。
希望高手教我解法，感谢。
--
※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 163.25.118.141
1F：推 qna:use Poynting vector 06/04 23:28
2F：→ ttttted:算出来了，感谢楼上 06/05 00:23