初中物理g的物理含義是什麼
一千克物體所受到的地球吸引力或重力.
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- 1. 物理課本放在水准案頭上,文具盒放在物理課本上,則() A.物理課本受到的重力和案頭對物理課本的支持力是一對平衡力B.物理課本對案頭的壓力和案頭對物理課本的支持力是一對相互作用力C.物理課本對文具盒的支持力和文具盒對物理課本的壓力是一對平衡力D.案頭對物理課本的支持力和文具盒對物理課本的壓力是一對相互作用力
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- 3. 泊松比為什麼可以取負值,
- 4. 泊松比有什麼物理意義?
- 5. 資料的泊松比是什麼意思?
- 6. 量子力學中表示力學量的算符之間對易和不對易意味著什麼?它們的物理意義是什麼?
- 7. 力學中M的物理意義
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- 9. 已知直角座標平面上四點A(1,0)B(4,3)C(2,4)D(0,2),求證:四邊形ABCD是等腰梯形
- 10. 已知四點A(-1,3),B(1,1),C(4,4)D(3,5)求證四邊形ABCD是梯形,用正余弦定理做~
- 11. g=G/m的物理含義 好像是每千克受的重力?
- 12. 力學定義式是什麼?
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