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Free store pickup |🚚 Free Delivery on Hong Kong order over $2000($800 for music publication orders details:Delivery Terms and Conditions) within 3-10 working days. Whatsapp : 2737 7688.
Free store pickup |🚚 Free Delivery on Hong Kong order over $2000($800 for music publication orders details:Delivery Terms and Conditions) within 3-10 working days. Whatsapp : 2737 7688.

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Print Music Winter Sale

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    STEAM小創客的科學教育與實驗製作11：旋轉木馬音樂盒

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    旋轉木馬音樂盒 　　在旋轉木馬遊戲過程中，我們可以學習到發條的工作原理是屬於槓桿力矩原理而運作的：當發條被上緊時，此時發條前端的槓桿力矩最長，所以發條前端輸出的力量也最大。運行一段時間後，緊緊盤在發條軸上的發條會慢慢鬆開，它的能量隨之下降。當能量即將耗盡時，發條末端的槓桿力矩最短，所以力矩也最...

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