Strength of Materials
A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal

metal is twice as dense as water
density of metal can’t be determined
metal will float in water
metal is twice as dense as unknown fluid

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Strength of Materials
In ideal machines

mechanical advantage is greater than velocity ratio
mechanical advantage is unity
mechanical advantage is less than velocity ratio
mechanical advantage is equal to velocity ratio

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