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The average power used by a stereo speaker is 54 W. Assuming that the speaker can be treated as a 4.2-%u03A9 resistance, find the peak value of the ac voltage applied to the speaker.
Relationships between wavelength, frequency and speed.
A sodium surface, which has a work function of 2.46eV is illuminated with a wavelength = 300nm light. What is the deBroglie wavelength of these electrons
Though slow on land, the leatherback turtle holds record for the fastest water speed of any reptile: 9.78 m/s. It is also among the largest of reptiles. Assume the largest leatherback yet discovered were to swim at the top leatherback speed. If its k..
A toy train rolls around a horizontal 1.30 diameter track. The coefficient of rolling friction is 0.10.
Two blocks with mass m1=2kg and m2=3kg hang on either side of a pulley. Block m is on an incline at 30 degrees, Find the maximum extension of the spring.
Consider a bright star in our night sky. Assume its distance from Earth is 89.4 light-years (ly) and its power output is 4.00 multiply.gif 1028W, Find the intensity of the starlight at the Earth
A simple harmonic oscillator takes 10s to undergo five complete vibrations.
How much work would it take to move a positive charge, 1uC, from the negative side of a parallel plate combination to the positive side when the voltage difference across the plates is 100V
A passenger on a stopped bus notices that rain is falling vertically just outside the window. Find the speed of the raindrops, given that the bus is moving with a speed of 17.2 m/s
a 2kg mass ona horizontal frictionless surface is attached to the free end of an ideal spring of stiffness k=30N/m. by what distance is the spring compressed as the mass comes to rest again
A 46kg box is being pushed a distance of 7 m across the floor by the force vector P whose magnitude is 144N. The force vector P is parallel to the displacement of the box.
Luigi wishes to suspend a lantern of mass m between his store and a telephone pole. THe cable attached to his store makes an angle (theta) to the wall. The cable to the telephone pole is horizontal.
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