Why are heavy elements (atomic number >26) typically only formed in supernovas or collisions of stars? O The fusion reaction for heavier elements is exothermic O Heavier elements are only formed in fusion reactions O Heavier elements are not formed via fusion reactions O The fusion reaction for heavier elements is endothermic

Why are heavy elements (atomic number >26) typically only formed in supernovas or collisions of stars? O The fusion reaction for heavier elements is exothermic O Heavier elements are only formed in fusion reactions O Heavier elements are not formed via fusion reactions O The fusion reaction for heavier elements is endothermic

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter30: Nuclear Physics

Section: Chapter Questions

Problem 39P

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Similar questions

Which of these elements is not “cooked up” by thermonuclear fusion processes in stellar interiors: carbon, silicon, chromium, bromine?
The star Alpha X (fictitious star) has a surface temperature of 23,100 K. How much more energy is emitted each second from each square meter of the surface of Alpha X than from each square meter of the Sun’s surface.
Do you think that nuclear fusion takes place in the atmospheres of stars? Why or why not?
The nuclear process for fusing helium into carbon is often called the “triple-alpha process.” Why is it called as such, and why must it occur at a much higher temperature than the nuclear process for fusing hydrogen into helium?
Calculate the energy created from 1 kilogram of hydrogen fused. (with units kg & m/s, answer will be Joules)
What is the element that was mostly produced in both processes (PPCR and CNO cycle) and what is the significance to the life cycle of stars?
In class I derived the ordinary nuclear density to be about 0.138 u/fm3. A neutron star is a collapsed star that contains neutrons in a highly compactified state, so its average density is higher. Assume a neutron star is spherical and has an average density which is about twice the ordinary nuclear density. If it is 50% heavier than the Sun, what would be its radius? (Given: mass of sun = 2*1030 kg, 1 u = 1.66*10-27 kg.) A) 14.6 km B) 11.6 km C) 10.1 km D) none of these.
Why don’t we see hydrogen Balmer lines in the spectra of stars with temperatures of 45,000 K? a. There is no hydrogen in stars this hot. b. The stars are hot enough that most of the hydrogen is ionized and the atoms cannot absorb energy. c. These stars are so cool that nearly all of the electrons in the hydrogen atom are in the ground state. d. Stars of this temperature are too cool to produce an absorption spectrum. e. Stars of this temperature are too hot to produce an absorption spectrum.
What is the heaviest element likely to be produced in fusion processes in stars?
Which of the following best describes a cyclotron used in producing element technetium? a. It’s a device use to circulate electronsb. It’s a device use to speed up the protonsc. It’s a device use to speed up the reactiond. It’s a device use to accelerate particles that move in spiral path
Stars are ___________ and ___________ because of the _____________ taking place at their centers. These collisions alter their atomic structure causing the release of an enormous amount of _____________. _____________ is the reaction that fuels the stars. The _____________ of different atoms combine to form a larger nuclei of different _____________. The nuclear fusion happening in the cores of the stars converts _____________ into _____________. This process of producing a new element through nuclear reactions is called _____________. The elements that can be produced depend on the _____________ of the star. The _____________ star can only convert hydrogen into helium. The medium stars like the sun can convert helium into _____________ and carbon once the hydrogen becomes depleted. The massive stars which are five times greater than the sun can convert helium atoms into _____________ and oxygen once the hydrogen becomes depleted. This is followed by the fusion of carbon and oxygen…
2. What kind of reactions provide a star with energy?