Consider a spherical cloud of gas of diameter D and density p. The only forces present in the system are pressure forces within the cloud and its self-gravity. The cloud is surrounded by empty space. For which of the following values of D is the fourth longest-wavelength mode of oscillation of the density perturbation unstable? (Below u is the speed of sound in the cloud and G is the gravitational constant) D = 3 ( D = (2) ਬ ( 5πu² Gp 2 1/2 1/2 1/2 D = D = (· πυ Gp 1/2 3пи² Gp

Consider a spherical cloud of gas of diameter D and density p. The only forces present in the system are pressure forces within the cloud and its self-gravity. The cloud is surrounded by empty space. For which of the following values of D is the fourth longest-wavelength mode of oscillation of the density perturbation unstable? (Below u is the speed of sound in the cloud and G is the gravitational constant) D = 3 ( D = (2) ਬ ( 5πu² Gp 2 1/2 1/2 1/2 D = D = (· πυ Gp 1/2 3пи² Gp

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

Activity 8: Complete Me! Directions: Complete the given following nuclear reactions on the formation of heavier elements during star formation and evolution. Write your answers in the space given. 1. n° → p* + - + v 2. p* + n° - 12D +- 3. 23He + 12_ 24He + p* 4. 12D + 12D - 24He + 5. 137 + 12D → 24He + - 6. 12H + 12H - 24He + 7. 13H +H 24He + - 8. _- 37Li + 9. + 47B + 10 -- 67C + - Q1 Week 1 (Learning Activity Worksheet) Target Competency: Give evidence for and describe the formation of heavier elements during star formation and evolution. (S11/12PS-lla-2) Page 4 of 8
How much energy is required to remove a proton from 157? ? (Units: MeV) The following table may be helpful (download it for easier use).
Isotopes carbon-11 (116C) and carbon-14 (146C) are radioactive. How would each isotope decay? Write the decay equation for each isotope. I know that Carbon-11 decays by positron emission and carbon-14 by beta decay. I need help writing the decay equations for Isotope carbon-11 and carbon-14.
Carbon 14 has a half-life of 5730 years, calculate the activity due to C-14 in 1.00 kg of carbon.
2. Assume that the entire luminosity of the Sun is due to the PP chain reaction. The complete PP chain reaction converts 4 hydrogen nuclei into 1 helium nucleus, according to the following reaction: 4 H - He + 2e* + 2v. a. Estimate the amount of energy released by one complete reaction. b. Estimate how many of these reactions occur per second in the Sun, and how many neutrinos the Sun produces each second. c. Estimate the flux of neutrinos (in v's s' cm?) passing through the Earth.
6.) A very old specimen of wood contained 10¹2 atoms of 14 C in 1986. (a) How many 14C atoms did it contain in the year 9474 B.C.2 (b) How many 14C atoms did it contain in 1986 B.C.?
Help.
View Image
Question 12 Nuclear fusion is a process which releases large amounts of energy and takes place in the core of stars like our Sun. Explain what is meant by nuclear fusion and the conditions necessary for it to take place. [about 150 words TUTARIA xecfureter pitztenen fargeping tontien SEAGA tallerkitty KAMIRIKIA Tantaastattes Forterrebenta Tank-Taric Hartafferies Whyteuffer ENDRERITAT ESFISSTEHALE SUSECTIONE STMENTEEL itaftarly RICERCAGE evements teleidens RISTISTATASTE athleschicht JEZERSITE GAMBAR 4315742424 Satelit Stimale Ras MUJERESES Sosyesyevelse 284 SHITA BRAWLIBETTEREM Intermit GIGIRIGEN EN ANDJESTHE LAE THUIZEMIE BURE POTESISIHAE JITHASEL
High temperatures are required for controlled nuclear fusion because nuclei must O produce antimatter. O have enough energy to oppose repulsive forces in the nucleus. O undergo a state change from solid to liquid in order to combine. O have enough energy to overcome the gravitational attraction of nuclei.
Natural gas (CH.) fuel relcases 50 MJ per kilogram of fuel combusted. The reaction is CH, + 20, CO2 + 2H;0 Calculate the energy released per kilogram of CO2 emitted. [Energy released is Eepe E, where Eris energy released per kilogram of fuel combusted, mf is mass of a kilogram-mole of fuel (CH.), and mr is mass of a kilogram-mole of carbon dioxide (CO2). The Molecular mass of an atom of carbon, hydrogen and oxygen are 12, 1 and 16 respectively.]
Question A4 Calculate the mass (in kg) of 14C that has an activity of 1 Bq.