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The depth of the potential well for free electron in a metal can be determined by noting that the photoelectric work function represents the energy necessary to remove an electron in such a state has the Fermi energy. Assuming that each atom contributes one free electron to the gas, calculate the depth of the potential well for free electron in gold. (the work function for gold is 4.8eV)
Charge is uniformly distributed around a ring of radius R= 2.50 cm, and the resulting electric field magnitude E ismeasured along the ring's central axis (perpendicular to the planeof the ring). At what distance (in cm) from the ring's center isE max..
A common flashlight bulb is rated at 0.270 A and 3.36 V (the values of current and voltage under operating conditions). estimate the temperature of the tungsten filament when the bulb is turned on
A physics professor is pushed up a ramp inclined upward at an angle 34.0 degrees above the horizontal as he sits in his desk chair that slides on frictionless rollers, Use the work-energy theorem to find his speed at the top of the ramp
A converging lens of focal length 0.25 m forms a virtual image of an object, What is the distance between the object and the lens
A curve of radius 40 m is banked for a design speed of 100 km/h. If the coefficient of static friction is 0.30 (wet pavement), at what range of speeds can a car safely create the curve?
solar panels are priced based on the number of kilowatts they generate. you pay the utility an amount based on the
q1. an air puck of mass 0.026 kg is tied to a string and authorized to revolve in a circle of radius 1.5 m on a
The magnitude of the force exerted by a spring is given by F = kx where x is the amount of stretching/compressing of the spring. What must be the units associated with k expressed in terms of fundamental SI units?
a wooden plank of length l and mass m is supported by an axle that passes through its center. a small package of mass
A 5.0 kg crate is transferred to a lower level by means of an 8 m long frictionless slide. What is the crates velocity at the bottom of the slide
A 71.0 kg skier is pulled up a frictionless ski slope that makes an angle of 15.0 deg. Determine the magnitude of the force exerted by the rope on the skier
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. What is the mass of the wheel
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