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Two musics students are tuning their guitars before arehearsal. If one middle C (262Hz) and the other plays a C sharp(277Hz) what will be the differences between the wavelengths in air and what will the frequencty of the bear be?
The Helium-Neon laser used in many labs and demos emits red light with wavelength of 0.6328 ?m. calculate how many photons of red light emerge from the laser every second
q1. a vaulter holds a 31.67-n pole in equilibrium by exerting an upward force u with her leading hand and a downward
A 38.0-kg child swings in a swing supported by two chains, each 3.08 m long. The tension in each chain at the lowest point is 426 N. Find the force exerted by the seat on the child at the lowest point
A solid conducting sphere with a radius of 35.4 cm contains atotal charge of 5.46 mC, evenly distributed over its surface. What is the direction of the electric field at its surface?
A student from Sidney, Australia compares the distance he obtained from the 1-st spark mark to the 20-th spark mark, What difference in the results was found
In adding, the snow exerts a retarding force on the sled that points opposite to the direction of motion, and has a magnitude of 57 N. Find out the acceleration of the sled and child.
Calculate the average kinetic energy and the average potential energy for the 2nd excited state of a harmonic oscilator. use expectation values to calculate a quantum mechanical average, show integrations.
A certain superconducting magnet in the form of a solenoid of length 0.40 m can generate a magnetic field of 14.0 T in its core when its coils carry a current of 95 A. Find the number of turns in the solenoid
A hovercraft of mass 69.0 kg can move on a horizontal surface, the x-y plane. How much work is done on the hovercraft by the force during this time
A generator connected to an RLC circuit has an rms voltage of 140 volts and an rms current of 33 mega-amps. what is the inductive reactance of the circuit
What is the shortest height a plane mirror must be so that a person who is 1.6 meters tall is able to see his or her whole body? plan a ray diagram to support your answer.
A rotating wheel requires 5.00 s to rotate 26.0 revolutions. Its angular velocity at the end of the 5.00-s interval is 99.0 rad/s. What is the constant angular acceleration (in rad/s) of the wheel
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