[問題] 幾題物理疑問
題目: http://tinyurl.com/7sz8upm
解答: http://tinyurl.com/6munjmg
想問一下 2 8 15 23 28 42 題要怎麼解呢?
其中
23題(b)選項寫說地面溫度低波速慢高空波速快敘述怪怪的
不是每高1公里溫度會下降6.5度,這樣高空溫度會比地面低
波速=331+0.6T 那高空波速不就比地面低了?
42題我的想法是說本來兩個20W的燈泡接到110V的電源上
那是指說兩個20W的燈泡本來各為110V,接到110V的電源上結果各降為55V
不知道是不是像我所畫的圖這樣
http://ppt.cc/nBo2
其他題沒有想法,拜託各位高手了,謝謝
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