Help please 1. How are elements beyond iron formed in massive-star supernovae? (
ID: 1516724 • Letter: H
Question
Help please
1. How are elements beyond iron formed in massive-star supernovae? (c)
A. Elements thrown out at high speeds fuse with hydrogen atoms in the interstellar medium
B. The high temperature and pressure allow iron nuclei to fuse.
C. Neutrons produced during the core collapse are slammed into atomic nuclei.
2. Which of the following statements about asteroids, Kuiper belt objects, and Oort cloud objects is true? (c)
A. Objects in the Oort cloud are made mostly of rock and metal.
B. Objects in the Kuiper belt are made mostly of rock and metal.
C. Objects in the asteroid belt and Kuiper belt orbit the Sun in nearly the same plane as the planets, but objects in the Oort cloud do not.
D. Objects in the asteroid belt are made mostly of ice.
Explanation / Answer
1. How are elements beyond iron formed in massive-star supernovae?
Ans: C.Neutrons produced during the core collapse are slammed into atomic nuclei.
Because, elements heavier than iron created in supernova flood of neutrons during core collapse coupled with neutrons decaying into protons creates these elements.
During iron core collapse, outer layers expelled as supernova- layers propelled by outflowing neutrinos.
2.Which of the following statements about asteroids, Kuiper belt objects, and Oort cloud objects is true?
Ans: C.Objects in the asteroid belt and Kuiper belt orbit the Sun in nearly the same plane as the planets, but objects in the Oort cloud do not.
Because, Objects in the Oort cloud are made mostly of icy objects that exist in the outermost reaches of the solar system.
Objects in the Kuiper belt are also made mostly of icy bodies and Objects in the asteroid belt are made mostly of rock and stone.
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