Dark matter is one of the great mysteries of astronomy and
Dark matter is one of the great mysteries of astronomy and physics, Dark matter is matter that does not radiate electromagnetic energy and so cannot be seen. If astronomers cannot see dark matter how do they know is there?
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two blocks are connected by a lightweight flexible cord that passes over a single frictionless pulley if m1 gtgt m2
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dark matter is one of the great mysteries of astronomy and physics dark matter is matter that does not radiate
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a block of mass 0434 kg is hung from a vertical spring and allowed to reach equilibrium at rest as a result the spring
a physics lab demonstrates the principles of simple harmonic motion shm by using a spring affixed to a horizontal
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