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A harmonic oscillator potential of natural frequency ω contains a number of electrons and is in the state of lowest energy. If that energy is 6.5 h ω,(a) how many electrons are in the potential well, and (b) what is the energy of the highest-energy electron?
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
A block (mass = 1.8 kg) is hanging from a massless cord that is wrapped around a pulley (moment of inertia = 1.2 x 10-3 kg·m2), find the angular acceleration of the pulley
A uniform electric field of magnitude 380 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. What is the velocity of the electron and direction
A river 108.0 m wide flows toward the south at 35.6 m/min. A girl on the west bank wishes to reach the east bank in the least possible time. How long does it take her to cross the river
A wire 50.0 cm long carries a 0.5 A current in the positivedirection of an x axis through a magnetic field B = (3.00 mT)j +(10.0 mT)k. what is the magnetic force onthe wire
A light string is wrapped around a 0.20-kg hollow 0.080-m-radius hoop. What is the angular acceleration of the hoop
A 50 gram bullet is fired into a block of mass 4.0kg, initially at rest at the edge of a frictionless table of height 0.8m. find the speed of the system before it strikes the ground
When a charge that is free to move is released in the presence of an electric field, does it move from a region of high electric potential to a region of low electric potential or vice-versa? Does your reply depend on whether the charge is positiv..
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 11.7 rad/s. how far would you have gone if the bike could move
a future space station in orbit about the earth is being powered by an electromagnetic beam from the earth. the beam
an astronaut is rotated in a horizontal centrifuge at a radius of 5.0 m.a what is the astronauts speed if the
An unknown substance has a mass of 0.125 kg and an initial temperature of 80.0°C. calculate the specific heat of the unknown substance
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