An airplane is flying at an altitude of 30,000 ft where rho = 0.0287 lbm/ft3, T = - 47 F. The pressure differential reading for the plane’s pitot tube reads 2.1 lbf/in2. How fast is the plane flying relative to the wind in ft/s?

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when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2