When an airplane is in level flight, its weight is balanced by a verticallift, which is a force exerted by the air. How large is the lift on an airplane in such flight if the mass ofthe airplane is 1.20 x 10 cubed kg.?

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  1. its weight is just
    F = ma
    = 1.2x10^3 * 9.8 = 1.176x10^4

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  2. the same airplane that was filled with 13 quarts of oil flies a distance of 3,300 miles. What is the average speed, in miles per hour of that airplane

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