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Suppose photons are produced in a cathode ray tube (CRT) from electrons which are accelerated across a potential of 21 kV.
What is the maximum energy, in electron volts, of the photons?
E=
What is the maximum frequency, in hertz, of these photons?
f=
Suppose electrons with E=13.0 eV approach a potential barrier of height 6.0 eV. For what minimum barrier thickness is there no reflection?
A train moving with constant velocity travels 180 m north in 14 s and an undetermined distance to the west. How far west has the train traveled in this time
If your calculations are correct, the column of air stopped rising before reaching the dew point, and no condensation or precipitation occurred.
A capacitor is constructed of two concentric conducting cylindrical heels. The radius of the inner cylindrical shell is 2.32 x10-3 m, and that of the outer shell is 2.52 x10-3 m. When the cylinders carry equal and opposite charges of magnitude 2.3 x ..
If the mass of the block is too large and the block is too close to the left end of the bar (near string B) then the horizontal bar may become unstable (i.e., the bar may no longer remain horizontal). What is the smallest possible value of x such t..
A 0.534-nm photon collides with a stationary electron. After the collision the electron moves forward and the photon recoils backwards. Find the momentum of the electron.
A student holds a laser that emits light of wavelength 633nm. The beam passes through a pair of slits separated by 0.3mm, Find the speed of the first-order maxima on the screen
A satellite mass 200 kg is launched from a site on earth's equator into an orbit 200 km above the earth's surface. Assuming a circular orbit, what is the minimum energy essential to be supplied in order to place the satellite in orbit from the surfac..
A nylon rope used by mountaineers elongates 1.30m under the weight of a 65.5kg climber. what is Young's modulus for this nylon
A projectile is fired with an initial speed of 37.8m/s at an angle of 44.7 degrees above the horizontal on a long flat firing range. Determine the total time in the air
A flywheel in the form of a uniformly thick disk of radius 1.53 m, has a mass of 12.1 kg and spins counterclockwise at 355 rpm. Calculate the constant torque required to stop it in 1.00 min
Consider the conical pendulum, a mass on the end of a string, with the other end of the string fixed to the ceiling. what is the speed (in m/s) of the mass as it swings
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