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An electron is in a certain energy state in a one-dimensional, infinite potential well from x = 0 to x = L = 150 pm. The electron's probability density is zero at x = 0.375L, and x = 0.500L; it is not zero at intermediate values of x. The electron then jumps to the next lower energy level by emitting light. What is the change in the electron's energy?
The two stars in a binary star system have masses 2.3x1030kg and 5.5x1030kg. They are separated by 1.5x1012m. What is the speed of the lightest star
An object's true weight is 135N. When it is completely submerged in water, what is the density of the object
A negative charge of -2.0 10-4 C and a positive charge of 9.5 10-4 C are separated by 0.24 m. What is the force between the two charges
A projectile proton with a speed of v collides elastically with a target proton initially at rest. what is the speed of the projectile proton
A 62-kg astronaut is in space, far from any objects that would exert a significant gravitational force on him. How fast is the astronaut moving after he throws the mallet
A pine cone falls from a tall tree. It takes 0.2 seconds to pass by a 2 meter tall window, i.e.the time between when it' s visible at the top of the window, How high above the window was it at its starting point
A 2.1 kg solid sphere ( I= 0.4mR2 ) rolls along a horizontal surface with a speed of 7.8 m/s. What is the total kinetic energy of the sphere
If a 25.00 gram bullet with a speed of 290 travels 14 into a tree before stopping, what's the average force exerted to stop bullet.
Two equally charged insulating balls each weigh 0.50 g and hang from a common point by identical threads 30 cm long, What is the magnitude of the charge on each ball
What is the frequency of the note played by this pipe.
blocks are lined up in a row on a frictionless table. How much force does the 8.0 block exert on the 7 block.
A 51.0 g sample of a conducting material is all that is available. The resistivity of the material is measured to be 12 ? 10-8, What must be the diameter of the wire
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