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1 let 120-ev electrons approach a potential barrier of height 42 eva for what barrier thickness is there no reectionb
1 a calculate the transmission probability of an a particle of energy e 50 mev through a coulomb barrier
1 apply the boundary conditions to the nite square- well potential at x 0 to nd the relationships between the
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1 the length scale on which the quantized nature of gravity should rst become evident is called the planck
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weightlessness occurs only at the center of mass of the international space station as it rotates 350 km above earth
stephen hawking has predicted the temperature of a black hole of mass m to be t uc 38pkgm where k is boltzmanns
1 according to the uncertainty principle can a particle having a kinetic energy of exactly zero be conned somewhere in
1 can you think of an experiment other than those mentioned in this chapter that might show the wave- like properties
1 why are neutrons more widely used than protons for studying crystal structure what about using a hydro- gen atom2
1 in 1900 did it seem clear that x rays were electromagnetic radiation give reasons for your answer was it
consider a two-electron atom in which the electrons orbiting a nucleus of charge ze follow bohr-like orbits of the same
1 show that the quantization of angular momentum l n u follows from bohrs assumption d that the mean value k of the
1 in 1896 pickering found lines from the star zeta puppis that had not been observed on earth bohr showed in 1913 that
1 compare the balmer series of hydrogen with the se- ries where n 4 for the ionized helium atom he what is the
1 what is the total mechanical energy for a ground- state electron in h he and li atoms for which atom is the electron
the nuclear radii of aluminum and gold are approxi- mately r 36 fm and 70 fm respectively the radii of protons and
1 when are photons likely to be emitted in the franck- hertz experiment2 is an electron most strongly bound in an
1 in an intense electron bombardment of the hydrogen atom signicant electromagnetic radiation is pro- duced in all
1 thomson himself was perhaps the biggest critic of the model referred to as plum pudding he tried for years to
1 the fermi gamma-ray space telescope launched in 2008 can detect gamma rays with energies ranging from 10 kev to 300
1 a photon having 40 kev scatters from a free electron at rest what is the maximum energy that the electron can obtain2