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1. Let 12.0-eV electrons approach a potential barrier of height 4.2 eV.
(a) For what barrier thickness is there no re?ection?
(b) For what barrier thickness is the re?ection a maximum?
2. A 1.0-eV electron has a 2.0 X 10-4 probability of tunneling through a 2.5-eV potential barrier. What is the probability of a 1.0-eV proton tunneling through the same barrier?
The driver of a 1720kg car traveling on a horizontal road at 102km/h suddenly applies the brakes. How many meters does it travel before stopping under these conditions
the brakes of a truck cause it to slow down by applying a retarding force of 3.40 x 103 n to the truck over a distance
A 500 turn solenoid with a length of 20 cm and a radius of 3.0 cm carries a current of 3.0 A. A second coil of four turns is wrapped tightly about this solenoid so that it can be considered to have the same radius as the solenoid. Find when the curre..
An electron is observed traveling at a speed of 1.89 107 m/s parallel to an electric field of magnitude 10,660 N/C. How far will the electron travel before coming to a stop? (The mass of electron is 9.109 10-31 kg, and the charge on the electron is 1..
A metal ball with a mass of 3.71·10-6 kg and a charge of +5.77 mC has a kinetic energy of 4.99·108 J. It is traveling directly at an infinite plane of charge with a charge distribution of +3.21 C/m2. If it is currently 1.87 m away from the plane of c..
A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 265 kg · m2, What is the new angular speed of the merry-go-round
A ball is thrown straight upwith an initial velocity v0=4.9 m/s. Assume that the acceleration due to gravity is g=9.8 m/s^2 downward. How long does it take to come back to its inital position
A 10 kilogram crate is sliding at a constant speed of 7 m/s along a frictionless horizontal table, when it encounters a friction patch (μs=0.7, μk=0.4). Obtain the speed of the crate after sliding this distance
A 37-kg girl is bouncing on a trampoline. All through a certain interval after she leaves the surface of the trampoline, her kinetic energy decreases to 215 J from 430 J. How high does she rise during this interval? Avoid air resistance.
a 1.0-cm-thick layer of water stands on a horizontal slab of glass. light from within the glass is incident on the
At the surface of a certain planet, the gravitational acceleration g has a magnitude of 13.0 m/s2. A 22.0 kilogram brass ball is transported to this planet. Find the weight of the brass ball on the Earth
Object O1 is 14.7 cm to the left of a converging lens with a 10.8-cm focal length. What is the overall magnification of this system
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