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Your friend needs advice on her newest "acoustic sculpture." She attaches one end of a steel wire, of diameter 3.98 mm and density 7860 kg/m3, to a wall. After passing over a pulley, located 1.01 m from the wall, the other end of the wire is attached to a hanging weight. Below the horizontal length of wire she places a 1.45-m-long hollow tube, open at one end and closed at the other. Once the sculpture is in place, air will blow through the tube, creating a sound. Your friend wants this sound to cause the steel wire to oscillate at the same resonant frequency as the tube. What weight (in newtons) should she hang from the wire if the temperature is 17.5°C?
Three parallel wires are parallel to the y-axis, and all are at z=0. The first is glued to the table top at x=0 and carries a current of 3 amps in the positive y direction. What is the initial acceleration(magnitude and direction) of the second wir..
a pendulum of length L = 48.8 cm and mass m=169g is released from rest when the cord makes an angle of 65.4 with the vertical
A very long, straight solenoid with a cross-sectional area of 6.00 is wound with 40.0 turns of wire per centimeter, and the windings carry a current of 0.250. What is the average induced emf in the secondary coil
at what height above the earth is the acceleration due to gravity 10% of its value at the surface, find the speed of a satellite orbiting at that height?
Starting from rest, your friend dives from a high cliff into a deep lake below, yelling in excitement at the thrill of free-fall on her way down. How long has your friend been in the air when she emits the yell whose frequency shift you hear
A small block of mass 20.0 grams is moving to the right on a horizontal frictionless surface with a speed of 0.68 m/s. What is the speed of the 40.0 gram block after the collision
An electric field is constant at every point on a square surface that is 0.80 m on a side. Calculate the electric flux E passing through the surface
It stops 90 cm from where you free it. The spring steady is 370 N/m. What is the coefficient of kinetic friction between the block and the table.
A flat sheet of ice (n = 1.309) has a thickness of 1.6cm. It is on top of a flat sheet of crystalline quartz (n = 1.544) that has a thickness of 0.86cm. Light strikes the ice perpendicularly and travels through it and then through the quartz. In t..
Two identical uniform poles of mass 50 kg and linear mass density 15 kg/m are supported by pivots 2 m apart on level ground. what angle do the poles make with the vertical
how high does it rise above the point of release. guess the speed of the car just before braking.
Light in a trasnparant material (index of refraction 1.333) strikes a boundary with another transparant material. (n=1.010), What is the critical angle for total internal reflection
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