CEM 141 - Chapter 3 Exam-Question with Correct Answers/ Verified
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Course
Cem 141
Institution
Cem 141
rapid expansion of the universe -️️Big Bang
how long after the Big Bang was air created? -️️few minutes
how long after the Big Bang were leptons (quarks, electrons) created? -️️1 picosecond
how long after the Big Bang were protons and neutrons created? -️️1 microsecond
how did m...
at very high temperatures, ___________ can occur - ✔️✔️nuclear fusion
fusion occurs in ________ - ✔️✔️stars
the strong force only acts over ___________ distances - ✔️✔️extremely short
how close together must two nuclei get for the strong nuclear force to come into play? - ✔️✔️~the
diameter of a nucleus
- ✔️✔️PE graph of two similarly charged nuclei
when fusion occurs, energy is _________ - ✔️✔️released
___________ holds nucleons together in the nucleus - ✔️✔️the strong nuclear force
nuclear reactions are accompanied by changes in _________ (UNLIKE chemical reactions) -
✔️✔️mass
- ✔️✔️mass-energy equivalence
__________ is the "binding energy" (the energy released when mass is converted to energy) -
✔️✔️E
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