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http://www.wretch.cc/album/show.php?i=springalbert&b=2&f=1291367643&p=154
...which rolls without slipping down an incline and then up along a vertical circular track of radius R. What...ball must start so that it barely stays in contact at the top of the circle? Assume r<<...
... factor: 1-1. Adjust orbit 2-1. Lock up setting bolt 2-2. Confirm a fixed...barometric tube 3-1. Pack a needle 3-2. Needle( Top ) 3-3. Needle(Side) 4-1. Dummy...
最後一題的答案是「磨擦力」,以下是一個外國網站的詳解: All real systems are actually nonconservative, that is they are systems where mechanical energy does not remain constant. In these systems energy is added from...
...分為六種:上( up )、下(down)、奇(strange)、魅(charm)、底(bottom)、頂( top )。 基本上質子是由兩個上夸克( up quark)和一個下夸克(down quark)所構成的,這個uud的結構可以說是質子的永久構成...
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