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A 3 dimensional infinite square well potential of length 1.0e-6 is occupied by 12 electrons. The system is at temperature 0 K and interaction between electrons can be neglected. Half are spin up and half are spin down. What is the higheat occupied energy state?
The sound level measured in a room by a person watching a movie on a home theater system varies from 45 dB during a quiet part to 65 dB during a loud part. Find how many times louder is the latter sound
A wire carries a current of 9.0 A in a direction that makes an angle of 22.0° with the direction of a magnetic field of strength 0.300 T. Find the magnetic force on a 7.00 m length of the wire
An airplane has a mass of 2.6 x10^6 kg, and the air flows past the lower surface of the wings at 95m/s. If the wings have a surface area of 1200m2, how fast should the air flow over the upper surface of the wing if the plane is to stay in the air?..
some of the first microscopes were really single-lens magnifying glasses made by leeuwenhoek. these devices had
A 66 kg rock climber is climbing a so called chimney between two rock slabs, What is her push against the rock
A rifle has a mass of 5.38 kg and it fires a bullet of mass 12.0 g at a muzzle speed of 827 m/s. What is the recoil speed of the rifle as the bullet leaves the gun barrel
10 kg of water at 20 degrees C converted to ice at -10 degrees C by being put in contact with a reservoir at -10 degrees C. This process takes place at constant pressure and the heat capacities at constant pressure of water and ice are 4180 and 2090 ..
a person travels by car from one city to another with different constant speeds between pairs of cities. she drives for
What is the strength of the electric field.
Two manned satellites approaching one another at a relative speed of 0.300 m/s intend to dock. What is the loss of kinetic energy in this inelastic collision
The angular speed of a car engine is increased at a fix rate from 1500 rev/min to 3600 rev/min in 18 second. Compute how many revolutions does the engine make during this18 sec interval?
a hydrogen atom is in a state with energy -0.850 .in the bohr model what is the angular momentum of the electron in the
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