 , 12.11.2019 09:31, dianactorres

# What is the si unit used to express gravitational potential energy? a. newton b. kilowatt c. horsepower d. joule   ### Other questions on the subject: Physics Physics, 21.06.2019 17:10, eloqit3338
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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.
Do you know the correct answer?
What is the si unit used to express gravitational potential energy?
a. newton
b. kilowa...

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