Find the minimum speed must give the air at the top

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Q. On a bet, you try to get rid of mercury from a glass by blowing across the top of a vertical straw immersed in the mercury. What is the minimum speed you must give the air at the top of the straw to draw mercury upward through a height of 1.80cm?

Q. Find the shear strain that results if a force of magnitude 8×10^5 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to bottom face of the plate.

Note that the shear modulus of steel in pascals is 7.50×10^10.

Reference no: EM1369252

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