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The depth of the potential well for free electrons in a metal can be correctly determined with observing that the photoelectric work function is the energy necessary to remove an electron at the top of the occupied states from the metal; an electron in such a state has the Fermi energy. Assuming all atoms provides one free electron to the gas, compute the depth of the well for the free electrons in gold. The work function for gold is 4.8 eV.
An automobile crankshaft transfers energy from the engine to the axle at the rate of 110 kW when rotating at a speed of 2170 rev/min. What torque does the crankshaft deliver
A solid spherical ball of mass 1.32 kg and radius 0.08 m rolls along a smooth, level surface with a speed of 2 m/s. How far up the plane does the ball go
A metal ball with a mass of 3.81·10-6 kg and a charge of +5.21 mC has a kinetic energy of 4.77·108 J. how close will it come to the plane before stopping
The blades of a kitchen blender rotate counterclockwise at 2.2×104 rpm (revolutions per minute) at top speed. find the average angular acceleration of the blades
Shooter shoots a bullet horizontally and has muzzle velocity of 460m/s and goes 45.7m. How can you do this with the range equation
The period of a pendulum is 0.215 s on Earth. The period of the same pendulum is found to be 0.467 s on planet X, whose mass is equal to that of Earth.
You've been given the task of designing a "water couch"-that one could lie on, floating on a lake, for instance-in the form of a flat rectangular slab made of Styrofoam with a density of 85 kg/m 3. Explain why he will not be able to breathe that wa..
An airplane accelerates down a runway at 3.20 m/s2 for 32.8 s until is finally lifts off the ground. Determine the distance traveled before takeoff.
A 3.2-kg block of iron (c=0.11 kcal/kgoC) that has been brought to a temperature of 1,045oC is placed on top of a 2.4-kg block of ice (c=0.5 kcal/kgoC) that has been cooled to -50oC
Two waves traveling on a string in the same direction both have a frequency of 236 Hz, a wavelength of 0.40 m, and an amplitude of 0.14 m. What is the phase difference between the two waves
A lonely party balloon with a volume of 2.40 L and containing 0.100 mol of air is left behind to drift in the temporarily uninhabited, Calculate the entropy change of the air during the expansion
A heavy piece of hanging sculpture is suspended by a 90 cm-long, 5.0 g steel wire, What is the mass of the sculpture
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