Concept explainers
Explain all answers clearly, with complete sentences and proper essay structure if needed. An asterisk (*) designates a quantitative problem, for which you should show all your work.
*21. The Lifetime of the sun. The Sun’s Mass is about 2 Ă— 1030 kg. ; This mass was about 70% hydrogen when the sun formed, with about 13% of this hydrogen available for eventual in the core.
a. Use the given data to calculate the total mass of hydrogen available for fusion over the lifetime of the Sun.
b. The Sun fuses about 600 billion kilograms of hydrogen each second. Based on your result from part a, calculate how long the Sun’s initial supply of hydrogen can last. Give your answer in both seconds and years.
c. Given that our solar system is now about 4.6 billion years old, when will the Sun run out of hydrogen for fusion?
Want to see the full answer?
Check out a sample textbook solutionChapter 8 Solutions
The Cosmic Perspective Fundamentals (2nd Edition)
Additional Science Textbook Solutions
Sears And Zemansky's University Physics With Modern Physics
College Physics
Conceptual Integrated Science
Modern Physics
College Physics: A Strategic Approach (3rd Edition)
Introduction to Electrodynamics
- Show your complete solution and illustrate if applicable. box the final answer. Please write your solution clearly and readable. Thank you.arrow_forwardPROBLEM SOLVING: Express your answer to the fourth decimal places. Show complete solution. Box your final answer. 1. A wooden object found in an Indian burial ground and subjected to radiocarbon dating. The decay rate associated with C-14 is 10 disintegrations per minute per gram carbon. What is the gge of the obiect?arrow_forwardA balloon, in the shape of a right circular cylinder, is being inflated in such a way that the radius and height are both increasing at the rate of 3 cm/s and 8 cm/s, respectively. What is the rate of change of its total surface area when its radius and height are 60 cm and 140 cm, respectively?arrow_forward
- For this question, CHOOSE THE CORRECT ANSWER, then explain your reasoning in the RATIONALE section below: Alpha, Beta-plus, Beta-minus and Gamma decay are all different forms of radio-Active decay. A certain radio-isotope emits ONE alpha particle, and its products then emit TWO beta-minus particles in succession. The atomic number of the final resulting nucleus will now change (as compared to your starting nucleus) by O A. zero O B. minus 1 OC. minus 2 O D. minus 3arrow_forwardFor the following homework problems please show all of your work. 1. If the energy of a photon is given by the equation E = hv, where h is known as Planck's constant, and has the value of h = 4.136 x 10-15 eV -s, then complete the following table. Please note: the unit called an electron volt (eV) is a unit of energy whose value is compa- rable to the values seen in atomic transitions, and a Hertz is Hz = 1/s. Be sure to show all of your work! %3D Spectral Region | Frequency (v) Radio Energy (E) 3.00 x 10° Hz Microwave 1.24 x 10- eV |Infrared 3.00 x 1012 Hz Red 1.77 eV Yellow 6.00 x 10" Hz Blue 3.10 eV 3.00 x 105 Hz 3.00 x 1019 Hz Ultraviolet X-Ray Gamma Ray 1.24 x 10° eVarrow_forwardPage 2 of 2 CONTENT Solve each problem using what you have learned. 7. The second brightest star in the sky (after Sirius) is Canopus. This yellow-white supergiant is about 1.13616 x 1016 kilometers away. How far away is it in light years? 28.1 8* Regulus (one of the stars in the constellation Leo the Lion) is about 350 times brighter than the sun. It is 85 light years away from the earth. How far is this in kilometers? 9. The distance from earth to Pluto is about 28.61 AU from the earth. Remember that an AU = 1.496 x 108 km. How many kilometers is it from Pluto to the earth? 10. If you were to travel in a straight line from Los Angeles to New York City, you would travel 3,940 kilometers. How far is this in AU's? 11. Challenge: How many AU's are equivalent to one light year?arrow_forward
- format in solving: 1. given 2. diagram (simple labeled sketch) 3. solution * formula (from formula sheet) * algebra * substitution * solve 4. therefore statement (full answer with correct sig figs)arrow_forwardPlease include a complete answer. Do not skip any steps. Please double check your work and include notes where appropriate.arrow_forwardformat in solving: 1. given 2. diagram (simple labeled sketch) 3. solution (use formula from formula sheet) 4. therefore statement (full answer with correct sig figs)arrow_forward
- What I Need to Know Al the end of this moduke, you should be able to 1. design a research useful in daily Me 2 write research title 3. describe background of research 4. state rosoarch questions 5. indicate scope and delimitation of study 6. present written statement of the problem What I Know Directions: Read and analyze the statements below. Encircie the lettor of the correct answer 1. Which of the following is NOT an essential characteristic of a researchable question? A. The question is answerable by some sort of data that can be collected. B. Answering the question provides e positive outcome to the society. C. The question is comprehensive. D. The question is interesting. 2. Which of the following is the most reliable source of research topic idea? A. Review of Literature B. Wikipedia C. Folklores D. Blogs 3. Which of the following questions is most suitable for quantitative research? A. Will the colors of the wall affect children's preference and engagement during play time? B.…arrow_forwardPlease answer part A,B,C. I posted it before but the answer was wrong and pleaase Do not copy the other's person works. Post all of your work In pictures. Thank you for your help!arrow_forwardRead the following items carefully. State your assumptions if any. Show your COMPLETE solution and BOX your final answers. Keep your answers and solutions in 4 decimal places. > Initially, 100 milligrams of a new radioactive substance Tobium, named after its discoverer Sir Tobs, was discovered and collected from one of the moons of Jupiter. After 6 hours from collection, the mass decreased by 4%, If the rate of decay IS proportional to the amount of the substance present at time t, find the amount of Tobium remaining after 48 hours.arrow_forward
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON