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1. Vortices are observed downstream of a 2-cm-diameter cylinder in 20-C atmospheric air. How far are the shed vortices apart downstream of the cylinder for an air speed of 5 m=s?
2. A sensor is positioned downstream a short distance from a 4-cm-diameter cylinder in a 20-C atmospheric airflow. It senses vortex shedding at a frequency of 0.16 Hz. Estimate the airspeed. 3. A 10-C wind blows over 6-mm-diameter high-tension wires. Determine the range of velocities over which vortex shedding occurs. Could the shedding frequency be heard? Humans with good hearing can hear frequencies between 20 and 20 000 Hz. (Such vortex shedding when ice coats the wires can cause ‘‘galloping'' where the wires actually oscillate from the usual catenaries to inverted catenaries resulting in wire failure.)
a stream of water is in a steady flow from a kitchen faucet. at the faucet the diameter of the stream is 0.840 cm. the
a transformer has N^1 =350 turns and N^2 =2000 turns. what voltage is developed across the secondary coil?
An electron is accelerated by a uniform electric field (1600 V/m) pointing vertically upward. Find the direction of electron velocity after it moves 0.50 centimeter from rest
A ball of mass .5 kg moves perpendicular to the door by the speed of 10 m/s. The door has a mass of 3 kg and a width of 2 m and is hinged about one end. The moment of inertia of a bar rotated about it's end is 1/3 Ml^2.
A 3440 kg statue is supported by a glass stand. The cross-section of the stand is square, 0.15 m to a side. Before the statue was placed on the stand, How much is the stand compressed by the statue
A point charge Q = 5.20e-6 C is at the center of a conducting spherical shell of radius R = 25 centimeter. Find what is the field just outside the shell
An LRC circuit is connected to a 12.5-kHz, 785-V (rms) source, L = 27.0mH, R = 8.20k? , and C = 6550pF. Determine the total impedance
The "literature" refers to books, journal articles, magazine and newspaper articles, company records and documents, and even personal interviews with knowledgeable industry conflict resolution experts.
Capacitors C1 = 5.65 µF and C2 = 2.75 µF are charged as a parallel combination across a 250 V battery. Calculate the resulting charge on each capacitor
the space shuttle takes off from cape canaveral in florida and orbits earth 19 times before landing back at cape
During a particular thunderstorm, the electric potentialdifference between a cloud and the ground is Vcloud -Vground = 1.3 x 108 V, What is the change in an electron's potential energy
A(n) 11.9 g bullet is shot into a(n) 6191 g wooden block standing on a frictionless surface. Calculate the velocity of the bullet before striking the block
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