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理化-國中7-9年級(四)
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搜尋相關的資源 839
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489
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1718
下載數7
修改日期:2026-02-17
【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-part2-資源代表圖
在牢裡救出瑪麗安的就是她後來的第二任丈夫倫福德。倫福德也是研究熱的學者,他發現熱質說無法解釋摩擦生熱,於是提出熱動說,沒想到卻因此與瑪麗安的關係出現問題……
觀看次數454
下載數0
修改日期:2026-02-06
【自然系列-物理 | 力學02】(伽利略與慣性) 原來是習慣的部分阿-資源代表圖
亞里斯多德認為,物體必須受力才能持續運動。但伽利略在斜面實驗中卻發現,若運動中的物體不受力的話就會維持運動狀態。於是伽利略提出了慣性--也就是「萬物有習慣維持原本運動狀態的性質」的說法。
觀看次數584
下載數0
修改日期:2026-02-06
【自然系列-化學 | 酸鹼01】(酸鹼的分辨)拉瓦節の酸鹼變色大作戰-下集-資源代表圖
在上一集中拉瓦節的酸鹼之惑終於解開,原來關鍵就是『酸的生成者』Oxygen!酸除了有酸、會腐蝕、石蕊試紙變紅之外,酸竟然還都存在氧元素,而瓦節的基礎化學論也因此變的更加完整!
觀看次數515
下載數0
修改日期:2026-02-06
【自然系列-化學 | 燃燒01】(燃燒與燃素說)燃燒東西軍I-燃素的奧義-下集-資源代表圖
雖然貝歇爾的理論不被世人們所接受,但他的頭號大弟子史塔爾,延續了阿貝師傅的精神,把油土解釋燃燒的現象,進一步用燃素來說明,使得本來乏人問津的理論一夜之間變得聲名大噪。
觀看次數645
下載數0
修改日期:2026-02-06
【自然系列-化學 | 物質探索05】(原子說的出現)道聽塗說,不如聽道耳吞圖解原子說-資源代表圖
沒錢讀書的道耳吞,受到魯寶遜神父幫助得以學習,之後向高夫教授學習。為了解決氣體均勻混合的問題,道耳吞提出原子說,衝擊科學界。原子說到底是什麼呢?讓我們看下去。
觀看次數502
下載數0
修改日期:2026-02-06
功率是被瓦特定義的?蒸汽機和馬怎麼比較作功大小?(功率的起源)│功與功率│科學家的故事-瓦特│LIS情境科學教材-資源代表圖
功率最早是為了要比較馬和蒸汽機的工作效率,才有了這個定義。當初瓦特雖然改良了蒸汽機,但他卻不知道該怎麼證明蒸汽機比馬更有效率,因此他開始思考功以及功率的概念。後來他也創造了馬力作為功率的單位。瓦特的成就,也讓他的名字成為現在公制的功率單位。
觀看次數329
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509
下載數0
修改日期:2026-02-06
【自然系列物理|電磁學06】(安培右手定則) 安培的華麗生活-資源代表圖
法國天才數學家安培看到厄斯特的電流生磁的實驗,變立刻對電流生磁的現象產生興趣,通過自己高超的數學能力,他很快地找到電流生磁的關係,並提出了著名的…
觀看次數618
下載數0
修改日期:2026-02-06