PHYS143 (DB125) Physics For Engineers
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The isotope, tritium, has a half-life of 15 years. Assume we have 12 kg of the substance. What will be the disintegration constant (in s-1)?
The number of states in the He+ ion corresponding to the principle quantum number n = 5 are
How many radioactive atoms are present in a sample that has an activity of 0.
An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom. Selecting the longest wavelength that will work from the those given below, what wavelength is needed if a photon accomplishes this task?
The half-life of 131I is 8.04 days. five days after it was prepared, its activity was 0.4 uCi. How many curies (in uCi) were initially prepared?
Calculate the binding energy per nucleon (MeV/nucleon) for tritium, (
Assume:
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m p = 1.007 825 u
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m n = 1.008 665 u
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m t = 66.92775 u
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u = 1.66 ´ 10-27 kg
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What angle does the orbital angular momentum make with the z axis of a hydrogen atom in the state n = 3, l = 2,me = -1?
What is the disintegration energy (in MeV) associated with this spontaneous decay?
mRa = 223.018502 u
mRn = 218.005601 u
mHe = 4.002 603 u
1 u = 1.66 x 10
An electron in a hydrogen atom makes a transition from the = 2 energy state. Determine the energy (in eV) of the emitted photon.
What value of wavelength is associated with the Lyman series for n = 2? (RH = 1.097*107 m-1)
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