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Sometimes, when the wind blows across a long wire, a low-frequency "moaning" sound is produced. This sound arises because a standing wave is set up on the wire, like a standing wave on a guitar string. Suppose that a wire (linear density = 0.0140 kg/m) sustains a tension of 39.6 N because the wire is stretched among two poles that are 6.65 m apart. The lowest frequency that an average, healthy human ear can detect is 20.0 Hz. What is the lowest harmonic number n that could be responsible for the "moaning" sound?
Calculate the numerical value of the capacitance of this capacitor after glycerin at 20?C completely fills the volume between the plates
a standard door into a house rotates about a vertical axis through one side as defined by the doors hinges. a uniform
The average resistivity of the human body is 5 ohm*m. The conducting path between two hands is approximated as a cylinder with length 1.6m, what is the resistance between the hands
A 66 kilogram skier coasts up as now-covered hill that makes an angle of 25 degree with the horizontal. The initial speed of the skier is 6.6 m/s. Determine the work done by the kinetic frictional force that acts on the skis
Kathy tests her new sports car by racing with Stan, an experienced racer. Both start from rest, Find the time at which Kathy overtakes Stan
a friend asks you how much pressure is in your car tires. you know that the tire manufacturer recommends 30 psi but its
Compute the magnitude of the electric field at one corner of a square 0.590m on a side if the other three corners are occupied with 1.53×10^-6C charges. In which direction is the electric field, away or towards center of the square?
question a blue ball is thrown upward with an initial speed of 21.2 ms from a height of 0.5 meters above the ground.
A two-stage rocket accelerates from rest at +3.27 m/s^2 for 6.82seconds. It then accelerates at +2.98 m/s^2 for another 5.90seconds. After the second stage, it enters into a state of freefall.
How much work does Bob do on the rock and How much force, assumed to be constant, does Bob apply to the rock
A 55 kg person riding a bike puts all her weight on each pedal when climbing a hill. The pedals rotate in a circle of radius 17 cm. (a) What is the maximum torque she exerts? (b) How could she exert more torque?
A uniform, solid metal disk of mass 6.50kg and diameter 24.0 cmhangs in a horizontal plane, supported at its center by a verticalmetal wire. You find that it requires a horizontal force of 4.23 Ntangent to the rim of the disk to turn it by 3.34 degre..
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