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理化-國中7-9年級(四)
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搜尋相關的資源 840
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602
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1730
下載數7
修改日期:2026-02-17
【自然系列-化學 | 物質探索07】(週期表的出現)決鬥吧!元素王-下集-資源代表圖
門德列夫參加了卡爾斯魯厄國際化學會議後,得知元素間的重量及化學性質,發現其中的規律性,以為完成元素表的門德烈夫發現如果按照重量將其填滿,元素的化學性質就會有偏移,但如果將化學性質對齊,整張表就會.......
觀看次數821
下載數0
修改日期:2026-02-06
【自然系列-化學 |物質探索10】(中子的發現)超原子時空冒險—最終章-下集-資源代表圖
有了湯木生教授所發現的電子,和拉塞福老師的質子,再加上查兌克自己提出的中子,究竟這些粒子代表了甚麼,他該如何善用這些偉大的科學精華,一舉擊敗鍊金術師,打造出自己的第一桶金呢!?
觀看次數502
下載數0
修改日期:2026-02-06
【自然系列-化學 | 物質探索06】(分子概念的出現)傷心酒吧的分子科學家-資源代表圖
化學家亞佛加厥一直想不通,為何等體積的氫氣和氯氣反應後,總體積竟然不變?依照道耳吞原子說和給呂薩克假說,等體積氫氣和氯氣有一樣多的原子,組成氯化氫體積應該變少啊?除非有半顆原子,或是……
觀看次數519
修改日期:2026-02-06
【自然系列-化學 |物質探索03】(元素的定義)化學之父 波以耳-波波急轉彎-下集-資源代表圖
波以耳加熱黃金,發現黃金卻不會改變,認為黃金就是一種元素,而且世界上非常多種元素,絕非只有四元素或三元素組成。煉金術師無法反駁,原地自爆。波以耳以實驗證明四元素說與三元素說不正確,為化學建立基礎。波以耳將如何破解呢?
觀看次數545
下載數0
修改日期:2026-02-06
【自然系列-化學 | 化學反應02】(化學平衡)化學反應的神奇比例-下集-資源代表圖
古德柏格和瓦格兩位哥倆好,因為貝特羅的實驗開始反覆猜想與驗證所有可逆反應在溫度不變的情況下,反應到最後,原料跟產物會呈現特殊的比例。而這些固定比例則源自於物質的濃度和吸引力所達到的「反應平衡」。
觀看次數518
下載數0
修改日期:2026-02-06
【自然系列-化學 | 酸鹼02】(電解物質與酸鹼)電解大師戴維-下集-資源代表圖
瘋狂進行各種電解實驗的戴維,成為了世界上發現最多元素的男人!使得他推翻了科學史上的金頭腦「拉瓦節」的重要發現:酸裡面都要有氧。既然決定酸的關鍵不是氧,那究竟是什麼呢?
觀看次數544
下載數0
修改日期:2026-02-06
【自然系列-化學 | 有機化學】(有機化學)維勒的跨界大發現-上集-資源代表圖
當時的科學家認為物質分為有機物與無機物,兩者差別在生命力的有無,而且兩者間是無法互相合成的。做無機化學的維勒在貝才利烏斯博士指導下,發表了氰酸銨研究,會後遇到研究有機化學的李比希,跟維勒要了一些氰酸銨,李比希有什麼企圖呢?
觀看次數549
下載數0
修改日期:2026-02-06
【自然系列物理|電磁學08】(電磁感應)電磁同根生-資源代表圖
電流會生磁,那磁會不會生電流呢?法拉第看完阿拉戈的銅盤實驗後有感而發,認為電磁應該會互相產生,但他與助手安德魯苦苦研究好久,都沒有任何進展,直到某一天...
觀看次數554
下載數0
修改日期:2026-02-06