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The windpipe of a typical whooping crane is about 4.7 feet long. Determine what is the lowest resonant frequency of this pipe, assuming that it is closed at one end? Assume a temperature of 34°C.
___________Hz
A radio tower is broadcasting an isotropic radio wave with a power of 1000 watts. What is the radiation pressure on a reflecting surface 250 meters away from the tower?
A spider hangs from a strand of silk whose radius is5.8x10-6 m.The density of the silk is 1100 kg/m3.When the spider moves, waves travel along the strand of silk at aspeed of 310 m/s. Determine the mass of the spider.
A boat moves through the water of a river at 9 m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.9 m/s, how long does it take the boat to make a round trip consisting of a 225 m displacement d..
a vertical cylinder of cross-sectional area 0.06 m2 is fitted with a tight-fitting friction- less piston of mass 5.4
A closed hollow sphere of radius R=60.0cm (the surface area of asphere of radius R is 4πR^2) is made of styrofoam havingthermal conductivity k=0.0450 watt/m celsius, find the thickness(assumed uniform) of the styrofoam wall of thehollow sphere
King Arthur's knights fire cannonball from the top of the castle wall. The cannonball is fired at a speed of 55 m/s and an angle of 29o above the horizontal. Find the cannonball maximum height above the ground
A deep-space vehicle moves away from the Earth with a speed of 0.735c. An astronaut on the vehicle measures a time interval of 3.05 s to rotate her body through 1.00 rev as she floats in the vehicle. What time interval is required for this rotation a..
define the speed with which the cart reaches positions 3, 2, and 1 (in that order). Neglect friction. Let g = 9.81 m/s2.
A certain type of propeller blade can be modeled as a thin uniform bar 2.50m long and of mass 26.0kg that is free to rotate about a frictionless axle perpendicular to the bar at its midpoint. find the maximum angular acceleration the blade could ac..
Resistance and potential difference in an electrical circuit.
a simple harmonic oscillator consists of a block of mass 3.90 kg attached to a spring of spring constant 169 nm. when t
A permanent magnet is hung from a string ( balanced ) and pointed in an East - West orientation and released. Describe its motion
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