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A car uses its brakes to stop on a level road. During this process, there must
be a conversion of kinetic energy into
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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.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Describe the three ray tracing steps used to identify an image for the given situation.