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a screw jack whose pitch is 2mm is used to raise a motor car of mass 900kg through a height of 20.0cm. The jack is 40cm if the jack is 50% efficiency Calculate (1) The velocity ratio (2) The mechanical advantage (3) effort required (4) work done by the effort

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Alex Ojonimi

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2y ago
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Wiki User

7y ago

gold = element
brass = mixture (alloy)
iron = element
steel = mixture (alloy)

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Wiki User

10y ago

lime stone

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Q: Classify following into element compound or mixture gold and brass or iron and steel?
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