why nuclear fusion reactions in massive stars stop in iron through the concept of binding energy?
Q: Life on Earth wouldn't be possible without supernovae. Why?
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Q: Why are metals less abundant in older stars than in younger stars?
A: Answer: The metals which basically are non hydrogen and helium material are produced or created in…
Q: Why are heavy elements (atomic number >26) typically only formed in supernovas or collisions of…
A: Heavier elements formed in supernovas and collision of stars
Q: Why wouldn't you expect to detect strong 21 cmt emission from an HIl region?
A: The 21 cm line corresponds to the wavelength of hydrogen gas. At 1420 Mhz the radiation released by…
Q: Assume that the protons in a hot ball of protons each have a kinetic energy equal to kT, where k is…
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Q: Why does helium fusion require a higher temperature than hydrogen fusion?
A: Fusion is the process by which two light atomic nuclei combine to form a single heavier one while…
Q: How much energy (in x 1016 Joule) does the Sun burn 1 kg of hydrogen fuel in a nuclear reaction?
A: Given data: Mass of hydrogen fuel, m=1 kg Speed of light, c=3×108m/s
Q: The decay constant of Au-198 is 2.97 × 10° s¹. Calculate the ratio of Au-198 remaining after 20…
A: Not all combinations of neutrons and protons are stable. When there are too less or too many…
Q: How many neutrons are in a 2.8-solar-mass neutron star? Assume the star’s mass is entirely neutrons…
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Q: .Explain proton-proton cycle of the energy production in stars using appropriate fusionreactions and…
A: The proton-proton cycle, also known as the proton-proton chain, is the primary energy production…
Q: The sun produces energy from matter in its core through the process of
A: We need to name the process in which the sun produces energy from matter in its core.
Q: 5) A nova can occur when a white dwarf, which is the dense core of a once-normal star, "steals" gas…
A: Given, Energy E = 1038 J Mass m = ? From Einstein's mass energy relation, we have…
Q: Both the CNO cycle and the proton–proton chain combine 4 H nuclei to produce 1 He nucleus. Would…
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Q: Determine the surface gravity on a neutron star. Assume the star has a mass 50% bigger than the…
A: mass of Sun = 1.98 * 1030 Kg mass of neutron star = mass of sun + 50%mass of sun = 1.5 * 1.98 *…
Q: The heavier an atomic nucleus gets, the less energy the star is able to extract from it through…
A: We know the star extract energy from nuclear fusion in their core. This nuclear fusion reaction…
Q: Equate the given expressions for pressure to find an expression for the maximum mass of a star. Find…
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Q: When two stars are in the same star system, they can affect each other’s evolution. Two stars in the…
A: Two stars in the same system might evolve at a different pace, depending on their distances in the…
Q: Give an Example of one cosmogenic nuclide (decay equation producing that nuclide), Give example of…
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Q: Where did the values for (T - 20 C) come from?
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Q: Why do you expect neutron stars to spin rapidly?
A: Neutron stars are formed when stars with 4 to 8 solar mass die. When such a star runs out of fuel…
Q: What phenomena can neutron stars supports?
A: Neutron stars are incompletely upheld against additional breakdown by neutron decadence pressure, a…
Q: (a) Using Einstein's famous equation for rest-mass energy, E = mc², undergoing nuclear energy that…
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Q: he energy in the Sun currently is provided by a process that combines two hydrogen atoms to form one…
A: Option C is the right answer Nuclear fusion.
Q: Why do old stars have less metal compared to new ones?
A: As per the Big Bang theory, the universe expanded from an initial high-density state. In the…
Q: Calculate the energy created from 1 kilogram of hydrogen fused. (with units kg & m/s, answer will be…
A: Four hydrogen nuclei have a total mass of 6.693 x 10-27 kg. They fuse into a helium nucleus of mass…
Q: A main sequence star of mass 25 M⊙has a luminosity of approximately 80,000 L⊙. a. At what rate DOES…
A: Given information: The mass of the star (m) = 25M⊙ The luminosity of the star (L) = 80000L⊙ part a):…
Q: Is the proton stable?
A: Proton is absolutely stable.
Q: Natural gas (CH.) fuel releases 50 MJ per kilogram of fuel combusted. The reaction is CH, +202 CO2 +…
A: molecular mass of CH4 =molecular mass of C + 4(molecular mass of H)=12+4(1)=16 molecular mass of CO2…
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- A supernova’s energy is often compared to the total energy output of the Sun over its lifetime. Using the Sun’s current luminosity, calculate the total solar energy output, assuming a 1010 year main-sequence lifetime. Using Einstein’s formula E=mc2 calculate the equivalent amount of mass, expressed in Earth masses. [Hint: The total energy output of the Sun over its lifetime is given by its current luminosity times the number of seconds in a year times its ten billion-year lifetime; ; mass of earth = 6×1024kg; c = 3×108m/s. Your answer should be 200-300 Earth masses.]if a star is converted every bit of its mass. into energy the conversion efficiency would be 100%. however no star is this efficient in its energy production stars with less than 1.3 solar masses convert hydrogen into helium with an efficiency of only 0.7%. besring in mind that aldebaram has a mass of 2.32*10^30 kg. how long will it live if it converts all of its hydrogen into helium with an efficiency of 0.7%. 1 year = 365.25 days. lifetime= yearsIf Bν ~ 10-5 Jy Ω-1, what is the brightness temperature (TB) at 1 GHz?
- How long will a 7 solar mass balck hole live?Assume that the solar wind causes the Sun to lose mass at a rate of 2 x 10’ kg/s. If you assume the wind is emitted a constant rate, estimate the time (in units of Gyr =Gigayears = 10° years) that it will take the entire Sun to evaporate via its solar wind emission. (Of course, the rate won't be constant throughout the lifetime of the Sun---this is just a rough estimate to understand the timescale associated with this process.) [Hint: you need to look up a number and do several unit conversions; this is a *rate* problem. Enter your answer as an integer or decimal, NOT in scientific notation.]If you were located 100 km from a 1 GW nuclear power plant,what would the neutrino flux be at your location? Assume that a1 GW nuclear power plant releases 1021 neutrinos per second andyou present a 1 m2 surface to the neutrino flux.