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Air flows past two equal sized spheres (one rough, one smooth) that are attached to the arm of a balance as is indicated in Fig. P9.83. With U = 0 the beam is balanced. What is the minimum air velocity for which the balance arm will rotate clockwise?
A scuba diver descends to 40 meters below the surface and has a 10 liter tank that contains air at 9 MPA and 7 C. Assume that the water has a density of 1000kg/m^3 and that atmospheric pressure is 100 KPA. He breathes at 5/ liters/min. How long can h..
In a lecture demonstration, a professor pulls apart two hemispherical steel shells (diameter D) with ease using their attached handles. She then places them together, pumps out the air to an absolute pressure of p, and hands them to a bodybuilder ..
Calculate the boundary-layer thickness at the end of the plate (for the two cases). Assume laminar flow (Blasius solution) and use seawater properties from Table 1.1.
at standard atmospheric temperature and pressure 25 c and 1 atm how many moles of dry air be present in a room having a
How derive the length kf cross belt drive?
develop algorithms for the explicit solution of the kinematic equations when applied to a problem of runoff from a
You are given a liquid and are asked to find its viscosity. Its density is known to be 0.97 g/cm^3. You place the fluid in an open vessel to which a 20 cm long vertical tube with an inside diamter of 2 mm, is attached to the bottom. When the depth of..
The uniform slender bar of mass m is initially in static equilibrium in the position shown. The bar is then rotated slightly and released.
a gas turbine engine has a pressure ratio of 9.2 to 1 and operates on an ideal brayton cycle. assume air enters at 25 c
500 lb force acting on frame is to be resolved into two components acting along axis of the struts ab and ac. if the
A 0.03-lb bullet traveling at 1300 ft> s strikes the 10-lb wooden block and exits the other side at 50 ft> s as shown. Determine the speed of the block just after the bullet exits the block, and also determine how far the block slides before it..
a ball is tossed from an upper-story window of a building. the ball is given an initial velocity of 8.20 ms at an angle
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