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理化-國中7-9年級(四)
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搜尋相關的資源 829
用水管隔空吸引鋁罐?│《科科學會了》把課本的「靜電(摩擦起電)」變有趣!-資源代表圖
靜電是什麼?靜電指的是電荷在物體表面不平衡分佈所引起的現象,當兩個物體互相摩擦時,電子會從一個物體轉移到另一個物體上,這種因為電子轉移而產生的電荷現象,就稱為靜電。靜電不會像電流一樣流動,它是暫時停留在物體表面的電荷,直到遇到導體或接地後才會釋放。以日常生活中的例子來說,當我們用塑膠梳子梳頭髮時,會發現頭髮變得容易吸在臉上,這是因為梳頭的過程中,電子從頭髮轉移到梳子上,使頭髮和梳子帶靜電,與臉產生吸附現象。
觀看次數321
修改日期:2026-02-23
ios
時間倒數-資源代表圖
app 時間倒數
洪琮欽/台南市網路中心國小1-4年級,國小6年級~國中9年級
Digital sand timer with artistic design. Time flows and does it stylishly. This digitized hourglass can be used to time anything for up to 60 minutes. It's like having a nice looking visual indicator of how much time is left on your task.* KIDS FRIENDLYTimer visualizes time to kids and lets them feel the time. Without reading or even knowing the numbers one can look at the visualized time flow, feel it and understand how long to wait or whether to hurry up.* STAY NOTIFIEDIt lets you set the alarm sound that will play when the timer is finished. You can choose from 16 unique alarm sounds, melodies and loops. You’ll be notified when your time is up even if you’re using another app or your device is locked. It can also repeat the sound alarm (up to 3 times) at the given interval if it was missed/snoozed.* COLOR YOUR TIMEYou can easily change the timer color to fit your personal lifestyle. There are 5 color themes: turquoise, red, green, amber and pink. Just pick the one you like in the application settings.* UNIVERSAL APPTimer works both on your iPhone/iPod and iPad, contains HD graphics for retina and iPad displays and supports all screen orientations for all devices. [+Retina graphics for iPad 3rd generation]* SEE ALSO: Best TimerBeautifully designed sand timer, stylish kitchen timer, countdown/up and powerful stopwatch All in one creatively combined Best Timer application to suit all your timing needs. Search "Best Timer" on iTunes (http://itunes.apple.com/app/best-timer/id415656570) 洪琮欽 時間倒數 Digital sand timer with artistic design. Time flows and does it stylishly. This digitized hourglass can be used to time anything for up to 60 minutes. It's like having a nice looking visual indicator of how much time is left on your task.* KIDS FRIENDLYTimer visualizes time to kids and lets them feel the time. Without reading or even knowing the numbers one can look at the visualized time flow, feel it and understand how long to wait or whether to hurry up.* STAY NOTIFIEDIt lets you set the alarm sound that will play when the timer is finished. You can choose from 16 unique alarm sounds, melodies and loops. You’ll be notified when your time is up even if you’re using another app or your device is locked. It can also repeat the sound alarm (up to 3 times) at the given interval if it was missed/snoozed.* COLOR YOUR TIMEYou can easily change the timer color to fit your personal lifestyle. There are 5 color themes: turquoise, red, green, amber and pink. Just pick the one you like in the application settings.* UNIVERSAL APPTimer works both on your iPhone/iPod and iPad, contains HD graphics for retina and iPad displays and supports all screen orientations for all devices. [+Retina graphics for iPad 3rd generation]* SEE ALSO: Best TimerBeautifully designed sand timer, stylish kitchen timer, countdown/up and powerful stopwatch All in one creatively combined Best Timer application to suit all your timing needs. Search "Best Timer" on iTunes (http://itunes.apple.com/app/best-timer/id415656570)
點閱數1677
下載數6
修改日期:2026-02-17
【自然系列-物理 | 聲學】 (聲學)聽見宇宙的聲音-part1-資源代表圖
畢德哥拉斯經過打鐵鋪發現物體震動會產生聲音,而且震動快慢會影響聲音的高低。某天做夢,他竟然聽到宇體每個天體都傳來聲音,這是怎麼一回事呢?
觀看次數417
下載數0
修改日期:2026-02-06
【自然系列-化學 | 酸鹼04】(pH值)超好用!酸鹼新指標pH值-下集-資源代表圖
為自己的名譽奮力一搏的科學家索羅森,拼了命的做實驗,終於成功發明出了特殊方法「PH值」來解決複雜的濃度表現方式,PH越大表示氫離子濃度小;反之,PH值越小表示氫離子濃度大。快來看看索羅森的世紀大發明吧!
觀看次數480
下載數0
修改日期:2026-02-06
【自然系列-物理 | 光學04】(光的粒子説)牛頓的反擊 -part2-資源代表圖
牛頓發現白光通過三稜鏡,與散成彩色的光,當所有顏色的光又聚集起來,又能變回白色。牛頓認為這些光都是不同種顏色的粒子,所以這是光是粒子的證據。只是這樣能打敗虎克嗎?
觀看次數534
下載數0
修改日期:2026-02-06
【自然系列-物理 | 光學02】(視覺原理與針孔成像)海什木牢中十年磨一劍 -part1-資源代表圖
古希臘人認為人看得見東西,因為眼中的內火點燃東西的外火。但此理論回答不出黑暗中為何看不見東西。海什木被哈里發關進牢中,正好有時間思考這個問題,此時一道光從小孔射入牢中,他看到……
觀看次數444
下載數0
修改日期:2026-02-06
【自然系列-物理 | 氣壓】(大氣壓力)藏在幫浦裡的OO -part2-資源代表圖
他,就是伽利略的學生托里切利。托里切利研究過大量水井之後發現,只有超過十公尺以上的井抽不出水。於是他想到,水不是為了消滅真空而上升,是被大氣壓力擠上來,大氣壓力約十公尺多水柱,或是76公分水銀柱。
觀看次數448
下載數0
修改日期:2026-02-06
【自然系列-物理 | 光學02】(視覺原理與針孔成像)海什木牢中十年磨一劍 -part2-資源代表圖
海什木看到書上出現牢外的石像,而石像透過小孔在書上的成像竟然是倒立的!由此現象的觀察以及對人類眼睛的研究,他認為人類看得見東西,是因為光照到東西後,反射到瞳孔,在眼睛內形成倒立成像。
觀看次數477
下載數0
修改日期:2026-02-06
【自然系列-物理 | 摩擦力】(永動機與摩擦力)阿蒙頓房間裡的秘密-part2-資源代表圖
阿蒙頓怎麼做也做不出永動機,深入研究才發現,所有的機械零件的接觸面都有阻力讓機械慢慢停止,他把這種力命名為「摩擦力」。他同時也發現,永動機一直在自己身邊……
觀看次數570
下載數0
修改日期:2026-02-06
【自然系列-物理 | 熱學02】 (熱質說與熱動說)瑪麗安的熱學生死戀-part1-資源代表圖
瑪麗安是法國大革命時代下悲劇的女子,第一任丈夫拉瓦節,曾用熱質說解釋化學反應放熱、研發出「量熱瓶」,並把熱質命名為卡洛里。好景不常,革命爆發,拉瓦節死於斷頭臺,瑪麗安也被關入牢中,直到「他」出現……。
觀看次數491
下載數0
修改日期:2026-02-06