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Consider a well of width a =10 nm confined between barriers of thickness b = 3 nm and height V0 = 0.3 eV. The energy Epk of the resonant state can be estimated from the result for the true well (Section 4.2). Next estimate the transmission coefficient of each barrier at Epk and use this to find the lifetime and width of the resonance.
A sports car traveling at 24.7m/s slows at a constant rate to a stop in 16s. What is the displacement of the sports car in this time interval
a small object of mass 3.46 g and charge -18.4 oc is suspended motionless above the ground when immersed in a uniform
Calculate the verage speed and time lead by the runner using the definition of average speed.
A dodgeball with mass 594.9 g is thrown directly at him with a speed of 22.43 m/s. He catches the dodgeball and then moves with a speed of 0.2635 m/s. What is the mass of the boy
a block of mass M hangs at rest. The rope that is fastened to the wall is horizontal and has a tension off 52 N. what is the angle theta
A moon of a planet like the Earth is 4.24 × 105 km distant from the planet's center, and it completes an orbit in 35.5 days. Determine the moon's orbital speed
Two small objects are hung, from a point, on strings 50 cm long. they each have mass .06 grams and are given equal charges if the strings each make an angle of 37 degrees with a vertical, what is the magnitude of the electric force between the ob..
Find the percentage variation of the resistivity of copper over the temperature range from room temperature 20oC to 98oC. Find by what percentage would its current change
Two very large parallel plates are uniformly and oppositely charged. The field among the plates is 1.6×106N/C . How dense is the charge on each plate (in C/m2 )? How much total charge is on each plate if they are 17.5cm on a side?
Two concentric, circular wire loops of radii r1= 17.0 cm and r2 = 25.7 cm, are located in anxy plane; each carries a clockwise current of 10.4 A (Fig.28-51). (a) Find the magnitude of the net magneticdipole moment of the system in amperes-square me..
How much heat flows from 1.00 kg of water at 40.0°C when it is placed in contact with 1.00 kg of 20°C water in reaching equilibrium? What is the change in entropy due to this heat transfer
An efficient parcel service wants to speed up its deliveries by dropping parcel into moving tracks. find how long after the track started did the worker wait before dropping the parcel
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