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April 16, 2014

Homework Help: physics

Posted by Edwin on Monday, March 22, 2010 at 11:27am.

A bird of mass 0.8kg hovers upwards by beating the mass of effective area 0.5m^2. (i) what is its upthrust? (ii) estimate the velocity imparted to the air by beating of the wings assuming the density of air at STP to be 1.3kg/m^3.

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