致命
发表于 2025-3-23 11:13:44
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Pepsin
发表于 2025-3-23 14:26:45
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CHASM
发表于 2025-3-23 20:55:41
The Vibrating Membraneply transferred in many respects..The membrane is a skin without an elasticity of its own. The stretching of the membrane along the edge leads to a tension force that acts as a backdriving force on a deformed membrane..Let the tangential tension in the membrane be spatially constant and time indepen
叙述
发表于 2025-3-24 01:42:26
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Ferritin
发表于 2025-3-24 03:39:15
Rotation About a Pointeorem. If the origin of the body-fixed coordinate system is set at the center of gravity of the body, one can separate the center-of-mass motion and the rotation in all practical cases. For this reason, the rotation of a rigid body about a fixed point is of particular significance.
混沌
发表于 2025-3-24 08:33:57
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表脸
发表于 2025-3-24 14:02:00
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profligate
发表于 2025-3-24 14:55:29
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BLANC
发表于 2025-3-24 21:28:03
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Dedication
发表于 2025-3-25 03:10:09
Maths Berlin,Insu P. Lee,Lonnie D. RussellIn 1851, Foucault found a simple and convincing proof of the earth rotation: A pendulum tends to maintain its plane of motion, independent of any rotation of the suspension point. If such a rotation is nevertheless observed in a laboratory, one can only conclude that the laboratory (i.e., the earth) rotates.