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Gunpowder residue is most likely to show up where on a shooters hands

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

What is the stall speed at sea level of an airplane that weights 10000 lbs., has a wing area of 300ft^2, and a maximum lift coefficient of 1.4? what is the stall speed if flaps that double cl,max are applied?