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Why is it easyer to lift a meter stick from the middle than the end of one?
Wiki User
∙ 13y ago
The centre of gravity would be at the mid point of the scale. So as we hold that particular portion and lift the scale then it will be easier. If we hold at one end and lift then the weight of the scale acting through the mid point would exert a torque whichmakes a rotary effect about the holding point. So it becomes so difficult.
Wiki User
∙ 13y ago
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How much hydrogen is enough to lift up 1 kg weight from the ground?
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How much hydrogen is enough to lift up 1 kg weight from the ground?
The weight of standard air is 1.2256 Kg/ Cubic Meter The weight of hydrogen is 0.0857 Kg/ Cubic Meter The weight of helium is 0.1691 Kg/ Cubic Meter Subtracting the weight of hydrogen from air gives you the gross buoyant lift of hydrogen as 1.1399 Kg/Cubic Meter Subtracting the weight of helium from air gives you the gross buoyant lift of helium as 1.0565 Kg/Cubic Meter These values are variable under altitude, pressure, temperature, humidity and purity of gas. Hope this helps you.
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