PHYS 284 Latest Exam With Complete Solution
PHYS 284 Latest Exam With Complete Solution 1) What percentage of the mass of the solar nebula consisted of elements other than hydrogen and helium? A) 0 percent B) 0.1 percent C) 2 percent D) 20 percent E) 80 percent - CORRECT ANSWER-Answer: C 2) Where did the elements heavier than hydrogen and helium come from? A) They were produced in the Big Bang. B) They evolved from hydrogen and helium shortly after the Big Bang. C) They were produced inside stars. D) They were produced inside dense interstellar gas. E) all of the above - CORRECT ANSWER-Answer: C 3) Why did the solar nebula heat up as it collapsed? A) Nuclear fusion occurring in the core of the protosun produced energy that heated the nebula. B) As the cloud shrank, its gravitational potential energy was converted to kinetic energy and then into thermal energy. C) Radiation from other nearby stars that had formed earlier heated the nebula. D) The shock wave from a nearby supernova heated the gas. E) Collisions among planetesimals generated friction and heat. - CORRECT ANSWER-Answer: B 4) Why di
Document information
- Uploaded on
- February 15, 2024
- Number of pages
- 18
- Written in
- 2023/2024
- Type
- Exam (elaborations)
- Contains
- Questions & answers
