Answers: 1
Physics, 21.06.2019 19:30
A500g object falls off a cliff and losers 100 j from its gravitational potential energy store. if the gravitational field strength g=9.8n/kg, how high is the cliff?
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Physics, 21.06.2019 22:10
Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley
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Physics, 22.06.2019 00:30
What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body
Answers: 1
Physics, 22.06.2019 07:50
The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.
Answers: 2
A whale comes to the surface to breathe and then dives at an angle 24 degrees to the horizontal surf...
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