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A string with both ends held fixed is vibrating in its third harmonic. The waves have a speed of 195 and a frequency of 250 . The amplitude of the standing wave at an antinode is 0.420 .
Calculate the amplitude at point on the string a distance of 25.0 from the left-hand end of the string.
1 as used in the laws of reflection and refraction what is the definition of the normal direction?2 the refraction
A solenoid of radius 3.5 cm has 800 turns and a length of 25 cm. Find the rate at which current must change through it to produce an emf of 90 mV
A point charge q(1)= 85.9 micro C is held fixed at the origin. A second point charge, with mass m = 6.00×10?2kg and charge q(2)= -2.36 micro C , is placed at the location (0.323 m, 0).
a worker pushes horizontally on a 35 kg crate with a force of magnitude 110 n. the coefficient of static friction
Assume the sound speed in air is 343 m/s. A jet aircragt's engines emit an 850 Hz roar. What frequency do you hear if the aircraft approaches you at 540mph
You have designed a new musical instrument of very simple construction. Your design consists of a metal tube with length L and diameter L/10. What must be the tension of the string to produce the desired effect
An object is placed 100 cm in front of a lens of focal length 20 cm. A second lens is placed 35 cm beyond the first, How far past the second lens is the final image formed
A sound wave in our classroom has speed of 380 m/s. There is a speaker at each end of the table that has 4.0 m length. What is the minimum phase difference between the waves arriving to you from the two speakers
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. Find the force acting on the electron as it revolves in a circular orbit of radius 5.34 10-11 m
A proton is initially at rest at a point where the potential is 459 V. Sometime later the proton is at a point where the potential is 218 V. If no force other than an electrostatic force acts on the proton, what is its final kinetic energy.
A piece of Nichrome wire has a radius of 5.0 x10-4 m. It is used in a laboratory to make a heater that dissipates 2.00 x10^2 W of power when connected to a voltage source of 120 V. Ignoring the effect of temperature on resistance, estimate the req..
two identical metal spheres a and b are connected by a plastic rod. both are initially neutral. 4.0times1012 electrons
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