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For the infinite square well problem an electron spends 40% of its time in the n=3 state and 60% of its time in the n=5 state. Write down an expression for its wave function in terms of the eigenfunctions [(2/L)^1/2]*sin(n*pie*x/L) . What is the average energy of the electron?
A sanding disk with rotational inertia 1.1 multiply.gif 10-3 kg·m2 is attached to an electric drill whose motor delivers a torque of 12N·m about the central axis of the disk. calculate the angular momrntum of the disk
Two balls , one of gold with a mass of 100 kg and one of wood with a mass if 1 kg, are suspended 1 meter apart. find attractive force the wooden ball acting on the gold ball
The current amplitude in an inductor in a radio receiver is to be 250 microA when the voltage amplitude is 3.6V at a frequency of 1.60Hz. What inductive reactance and inductance is needed
A 1.20-m-long metal bar is pulled to the right at a steady 5.9m/sperpendicular to a uniform, 0.790-T magnetic field. Calculate the magnitude of the emf induced in the circuit
A small object of mass 0.0150kg & a charge of 3.1 uC hangs fromthe ceiling by a thread. A second small object, with a charge of4.2 uC, is placed 1.2m vertically below the first charge. Find a) the electric field at the position of the upper charge..
You are a secret agent and find that you have been pushed out of an airplane without a parachute. Fortunately, you are wearing a large overcoat, what is your new terminal velocity with the coat
Two 3.25μF capacitors are connected in series across the terminals of a 50.0-Hz ac generator that has a peak voltage of 244V. Determine the rms (peak) current in the circuit
A 1.0- kg mass is attached to a string wrapped around a shaft of negligible mass and having a 5.0- cm radius. How far apart are the masses of the dumbbell
A ball is thrown directly downward with an initial speed of 7.70 m/s, from a height of 29.0 m. After what time interval does it strike the ground
A space station, in the form of a wheel 100 m in diameter, rotates to provide an "artificial gravity" of 2.10 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of rotation of the wheel
An object moves with constant acceleration 4.00 m/s^2 and over a time interval reaches a final velocity of 12.0 m/s. If its initial velocity is 6.00 m/s, what is its displacement during the time interval?
A 0.0500-kg lead bullet of volume 5.00 × 10?6 m3 at 20.0 °C hits a block that is made of an ideal thermal insulator and comes to rest at its center. How much heat was needed to raise the bullet to its final temperature
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