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An elevator (mass 4500 kg ) is to be designed so that the maximum acceleration is 7.00×10−2g.? Would a star cluster with supergiants be more likely to also have red dwarfs or white dwarfs at the same time? Did Donald Trump stare at the Solar Eclipse without sunglasses or eclipse glasses? Why do goalies hands hurt less if he catches a puck while moving his hand in the same direction the puck is moving? How do I prove if two linear systems have the same solutions it follows that the corresponding matrices are row equivalent?