Question

One day Daniel Bernoulli was sitting in a Starbucks sipping on a Venti Mocha Frappuccino. He pondered some of the many applications of his newly developed principle. Grab a Starbucks of your own, and help him to answer the following questions. Assume air weighs 0.081 lb/ft³.

1. In a hurricane, roofs of structures are really lifted off, and not blown off, due to the decreased pressure as the wind blows over the roof. Determine the required wind speed to lift a roof that weighs 24 psf. Assume the roof is not tied down.
(include units with answer)

2. Determine the minimum required take-off speed of a 23000 pound UScairways jet with a wing area of 1240 ft². Use a lift coefficient of K=0.12.
(include units with answer)

3. Daniel's good friend Giovanni Venturi joined him for another round of fraps. They were discussing ways to determine the velocity of water in a pipe. If the pressure drops 630 kPa as water flowing in a 34 cm diameter pipe is forced to flow through a 16 cm diameter portion, what is the velocity of the water in the 34 cm section of pipe?
(include units with answer)

Answer 1