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A 5.0-, 0.732- wire is used to support two uniform 235- posts of equal length (the figure ). Assume that the wire is essentially horizontal and that the speed of sound is 344 . A strong wind is blowing, causing the wire to vibrate in its 5th overtone.
What is the frequency of the sound this wire produces?
What is the wavelength of the sound this wire produces?
Suppose a star with radius 8.39 multiply.gif 108 m has a peak wavelength of 686 nm in the spectrum of its emitted radiation. What is the surface temperature of the star
A woman holds a tube of lipstick 5.1 cm from a spherical mirror and notices that the image of the tube is inverted, Calculate the focal length of the mirror.
In a carnival they often have a large r = 16 m, cylinder which people stand against the outer wall while it rotates with some velocity, What is the minimum velocity of the cylinder to make someone "stick" to the wall in m/s
A current of 22.0 mA is maintained in a single circular loop of 1.90 m circumference. A magnetic field of 0.830 T is directed parallel to the plane of the loop. Calculate the magnetic moment of the loop
you are a fighter pilot in your jet. you are moving at 1000 km/h when you go into a climb in order to avoid a HUGE UFO. What is the radius of the circular arc
Find the change in internal energy using first law of thermodynamics.
Two identical aluminium objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at the higher potential.
A 20 Kg loudspeaker is suspended 2.0 m below the ceilling by two cables that are each 30' from vertical . What is the tension in the cables
Heat engines take input energy in the form of heat, use some of that energy to do work, What is the magnitude of the internal energy that the athlete uses in order to do 9.7x104 J of work
The focal lengths of the objective and the eyepiece in a microscope are 0.29 cm and 2.50 cm, respectively. compute the final magnification of the microscope
A straight wire in a magnetic field experiences a force of 0.029 N when the current in the wire is 2.5 A. What is the new current
One end of a spring is attached to a wall. A 28N pull on the other end causes the spring to stretch by 2.8cm, What is the spring constant
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