[題目] 電場與熱

看板Physics作者 (Hugo!!!)時間13年前 (2012/06/04 23:18), 編輯推噓1(1推 0噓 1→)
留言2則, 2人參與, 最新討論串1/1
[題目] 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. [瓶頸] (寫寫自己的想法，方便大家為你解答) 這是我這一次masteringphysics的作業題目，答案是160，我看到熱我就用 H=ms(deltaT)來代，但我不知道產生的熱要怎麼表示。 希望高手教我解法，感謝。 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 163.25.118.141
推
06/04 23:28, , 1F
use Poynting vector
06/04 23:28, 1F
→
06/05 00:23, , 2F
算出來了，感謝樓上
06/05 00:23, 2F
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