10:59ull LTEDoneScreenFull Pageb). i). What is meant by Time dilation?ii). Hence, a clock on a space rocket ticks off at a time interval of 1hour.what isthe time elapse on earth if the space rocket is travelling at a speeda). 1610km/hr ? andB). 0.8c ? [c =3.0 x10°m/s]5Crop and scale c).i). A 50 grams in radionuclide decays 45 grams in 240 years. What is the half-life of the radionuclide?ii). If the energy of the hydrogen atom is -13.6 eV/n?, determine the energy ofthe hydrogen atom in the state n= 1,2,3,4,5 and hence the energy required totransition an atom from the ground state to n=5? [ 1eV = 16 x10-19 J , h = ]

Answered: Image /qna-images/answer/3339821b-b3f5-4ca4-8e9e-0ced5cbb74cd.jpg

b). i). What is meant by Time dilation? ii). Hence, a clock on a space rocket ticks off at a time interval of 1hour.what is the time elapse on earth if the space rocket is travelling at a speed a). 1610km/hr ? and B). 0.8c ? [c =3.0 x10®m/s] 5

b). i). What is meant by Time dilation? ii). Hence, a clock on a space rocket ticks off at a time interval of 1hour.what is the time elapse on earth if the space rocket is travelling at a speed a). 1610km/hr ? and B). 0.8c ? [c =3.0 x10®m/s] 5

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter30: Atomic Physics

Section: Chapter Questions

Problem 6PE: (a) An aspiring physicist wants to build a scale model of a hydrogen atom for her science fair...

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(a) An aspiring physicist wants to build a scale model of a hydrogen atom for her science fair project. If the atom is 1.00 m in diameter, how big should she try to make the nucleus? (b) How easy will this be to do?
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(a) Estimate the mass of the luminous matter in the known universe, given there are 1011 galaxies, each containing 1011 stars of average mass 1.5 times that of our Sun. (b) How many protons (the most abundant nuclide) are there in this mates? (c) Estimate the total number of particles in the observable universe by multiplying the answer to (b) by two, since there is an electron for each proton, and then by 109, since there are far more particles (such as photons and neutrinos) in space than in luminous matter.
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(a) Calculate the energy released in the a decay of 238U . (b) What fraction of the mass of a single 238U is destroyed in the decay? The mass of 234Th is 234.043593 u. (c) Although the fractional mass loss is large for a single nucleus, it is difficult to observe for an entire macroscopic sample of uranium. Why is this?
Suppose you have a pure radioactive material with a half-life of T1/2. You begin with N0 undecayed nuclei of the material at t = 0. At t=12T1/2, how many of the nuclei have decayed? (a) 14N0 (b) 12N0(C) 34N0 (d) 0.707N0 (e) 0.293N0
c).i). A 50 grams in radionuclide decays 45 grams in 240 years. What is the half- life of the radionuclide? ii). If the energy of the hydrogen atom is -13.6 eV/n², determine the energy of the hydrogen atom in the state n= 1,2,3,4,5 and hence the energy required to transition an atom from the ground state to n=5? [ 1eV = 16 x10-19 J , h = ]
A. Compiete the following nuclear reactions and identify the cosmic phase (big bang, stellar formation, stellar explosion) in which the reaction occurred! DON'T FORGET TO IDENTIFY IF ITS BIGBANG, STELLAR FORMATION OR STELLAR EXPLOSION 11. 20NE + He Mg+ 12. H+ H-H+ 13. Fe+ 3;n- 14. He + He→ 15. Fe+19. - 2; H - Fe+7 |
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