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Seven electrons are trapped in a one-dimensional infinite potential well of width L. What multiple of h2/8mL2 gives the energy of (a) the first excited state, (b) the second excited state, and(c) the third excited state of the system? Suppose that the electrons do not interact with one another, and do not neglect spin.
A 140-m-wide river flows due east at a uniform speed of 3.9 m/s. A boat with a speed of 7.8 m/s relative to the water leaves the south bank pointed in a direction 39o west of north. How long does it take for the boat to cross the river
A 110 g hockey puck sent sliding over ice is stoppedin 14 m by the frictional forceon it from the ice. If its initial speed was 7.0 m/s, what is the magnitude of the frictional force
A 779-kg car stopped at an intersection is rear-ended by a 1820-kg truck moving with a speed of 15.0 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find out the final speed of both vehicles ..
Three identical capacitors are connected in parallel to a battery. If a total charge of Q flows from the battery, how much charge does each capacitor carry
A rock is thrown vertically upward with a speed of 14.0m/s from the roof of a building that is 50.0 m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? What is the speed of the rock just befor..
At the 18th green of the U. S. Open you need to make a 20.5 ft putt to win the tournament. Assuming the deccelration caused by the grass is constant, what should the initial speed have to be to make the putt
a spring is hung from the ceiling. a 0.596 -kg block is then attached to the free end of the spring. when released from
A 68 kg diver steps off a 12 m tower and drops from rest straight down intothe water. If he comes to rest 4.0 mbeneath the surface, determine the average resistance force exertedon him by the water.
If liquid oxygen is stored as saturated liquid at its normal boiling point, find what is the enthalpy change per mole of oxygen between the liquid storage tank and the state which the oxygen is at 1.5atm and 27oC
An object consists of a ball of weight W glued to the end of a uniform bar also of weight W. if you release it from rest, with the bar horizontal.
describes the net gravitational force on the particle due to the shell? zero if the particle is at the center of the shell but nonzero at other locations within the hollow zero for any location of the particle within the hollow.
consider a uniform electric field of 50 nc directed toward the east. if the voltage measured relative to ground at a
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