The half-life of radioactive carbon-14 is 5700 years. In 17, 100 years, how much
ID: 298160 • Letter: T
Question
The half-life of radioactive carbon-14 is 5700 years. In 17, 100 years, how much carbon-14 remains in the original sample? a) Nothing remains. b) Half of the sample remains. c) One-quarter of the sample remains. d) One-eighth of the sample remains. e) One-third of the sample remains. f) The original sample retains all of its carbon-14. Which of the following theories is currently accepted as best describing the origin of the Moon? a) Giant Impact b) Fission c) Co-accretion d) Capture e) None of the above. Where are asteroids found in the solar system? a) in the Asteroid Belt between Mars and Jupiter b) 60 degrees in front of Jupiter and behind Jupiter in its orbit c) crossing Terrestrial planet orbits d) captured as moons of Mars and several Jovian planets e) in the plane of the ecliptic f) All of the above statements are true. g) Only (a) and (c) arc true Pluto and Eris best resemble a) Jovian planets b) Terrestrial planets c) Main-Belt asteroids d) Kuiper Belt comets c) escaped moons of Neptune Which of the following is observed as a property of every Terrestrial planets in our solar system? (a) Thick atmospheres (b) Active volcanism (c) Impact craters (d) High temperatures (e) RingsExplanation / Answer
38) Answer : d
After 3 half-lives one eighth of the sample or 12.5% of sample remains.
39) answer : gaint impact hypothesis
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