UNIVERSE (LOOSELEAF):STARS+GALAXIES
6th Edition
ISBN: 9781319115043
Author: Freedman
Publisher: MAC HIGHER
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Chapter 26, Problem 28Q
To determine
The explanation for the first fusion reactions that took place in the first stars to be the first since the universe was
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Complete the following nuclear reactions
and identify the cosmic phase (Big Bang
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What would you guess about the temperature of these areas? Explain why.Do you think there would be a lot of particles present? Explain why.
How might you relate the big bang to yourself as a physical entity? What elemental parts of your chemical makeup were produced during the initial inflation Era of the big bang?
Chapter 26 Solutions
UNIVERSE (LOOSELEAF):STARS+GALAXIES
Ch. 26 - Prob. 1QCh. 26 - Prob. 2QCh. 26 - Prob. 3QCh. 26 - Prob. 4QCh. 26 - Prob. 5QCh. 26 - Prob. 6QCh. 26 - Prob. 7QCh. 26 - Prob. 8QCh. 26 - Prob. 9QCh. 26 - Prob. 10Q
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- The Analysis of the Big Bang Theory.arrow_forwardWhy does primordial nuclesythesis end about 3 minutes after the Big Bang ? select one : a. The number densities of photons is too large at this time and the photons induce fission , stopping nuclei formation b. The universe is tooo hot at t=3 minutes c. The number densities of neutrons and protons and other nuclei are too small at this time and fusion fades out . d. Deuterium has a lifetime of 3 minutes , so after this time no more deuterium survives as it decays away ?arrow_forwardThe cosmic microwave background consists of: huge clouds of dark matter interspersed with equally huge clouds of H and He enormous cold voids separating warmer filaments of young protostas and protogalaxies denser areas of slightly warmer Hydrogen mixed with slightly less dense areas of slightly cooler Helium an enormous number of photons, particles of light that emerged after the Big Bang atoms of H and He, dark matter, and an immense amount of energy MacBook Air DII DD 30 D00 000 F7 F8 F9 F4 F5 F6 & 4 8 R Yarrow_forward
- What are the three important pieces of evidence that led scientists to accept the Big Bang as the most likely model for the origin of the universe?arrow_forwardAccording to the Big Bang Theory, order from earliest to latest, the sequence of events that are thought to have taken place at the beginning of the Universe. If statement A is first, B is second, etc. then enter ABCDEF.A) The universe becomes transparent releasing the photons of the Cosmic Microwave Background.B) Most carbon and oxygen in the Universe is produced.C) Inflation occurs.D) Hydrogen and Helium are synthesized.E) The symmetry of the four forces is broken and gravity becomes a separate force.F) Protons and anti-protons form.arrow_forwardThere is still some uncertainty in the Hubble constant. (a) Current estimates range from about 19.9 km/s per million light-years to 23 km/s per million light-years. Assume that the Hubble constant has been constant since the Big Bang. What is the possible range in the ages of the universe? Use the equation in the text, T0=1H , and make sure you use consistent units. (b) Twenty years ago, estimates for the Hubble constant ranged from 50 to 100 km/s per Mps. What are the possible ages for the universe from those values? Can you rule out some of these possibilities on the basis of other evidence?arrow_forward
- Would a human have been possible during the first generation of stars that formed right after the Big Bang? Why or why not?arrow_forwardIs cosmology the study of the Universe, the observable universe, or both? How do you know?arrow_forwardWhat is the evidence that star formation began when the universe was only a few hundred million years old?arrow_forward
- The CMB contains roughly 400 million photons per m3. The energy of each photon depends on its wavelength. Calculate the typical wavelength of a CMB photon. Hint: The CMB is blackbody radiation at a temperature of 2.73 K. According to Wien’s law, the peak wave length in nanometers is given by max=3106T . Calculate the wavelength at which the CMB is a maximum and, to make the units consistent, convert this wavelength from nanometers to meters.arrow_forwardAssume the observable Universe is charge neutral, and that it contains n nuclei (hydrogen plus helium nuclei, ignoring other elements). Take the helium mass fraction as 1/4. How many electrons are there in the observable Universe? Enter your answer in scientific notation with one decimal place. Value: n = 4*1080arrow_forwardThe background radiation has an average temperature of 2.7 K, using Wien’s Law, the current background radiation in the microwave region, the peak wavelength is 1mm. In the past, when the cosmic background radiation had a peak wavelength of 51.1 µm, calculate the relative size of the universe compared to the current size of the universe, that is, the universe was how much smaller by a factor of what? Round to TWO places past the decimalarrow_forward
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