Concept explainers
Whether the statement is true or false.
Answer to Problem 1QAP
The statement is false.
Explanation of Solution
Sun is middle-aged, main sequence star of G2 spectral type. The surface temperature of the Sun is 5800 K. The structure of Sun is defined by hydrostatic equilibrium and energy balance.
Hydrostatic equilibrium is the balance of inward force of gravity by the outward force due to pressure of
Energy balance is the balance between energy production and loss. The sun emits huge amount of energy per second nearly equal to
Conclusion:
Thus, the statement is false.
Want to see more full solutions like this?
Chapter 11 Solutions
UNDERSTANDING THE UNIVERSE(LL)-W/CODE
- How much mass would have to be converted to energy to get the energy of one-megaton bomb of TNT? One megaton of TNT = 4 × 10 15 Joules.arrow_forwardThe Drake Equation is a tool for estimating ... A) the number of alien civilizations that have visited the Earth in the past B) the number of planets in the Milky Way that contain civilizations intelligent enough to communicate through space. C) the number of habitable planets in the Milky Way where life has developedarrow_forwardAssuming it were possible, how long would it take a car traveling at 60 miles per hour to leave the solar system?arrow_forward
- If a star converted every bit of its mass into energy the conversion efficiency would be 100%. However, no star is this efficient in its energy production. Stars with less than 1.3 solar masses (most stars are less than 1.3 solar masses) convert hydrogen into helium with an efficiency of only 0.7%. Bearing in mind that Arcturus has a mass of 2.16 × 1030 kg, how long will it live if it converts all of its hydrogen into helium with an efficiency 0.7%? Please note that it won't actually convert all of its hydrogen into helium so this is a rather optimistic upper limit for the lifetime of Arcturus. Also, 1 year = 365.25 days.Lifetime =arrow_forwardHow fast do gravity waves move? 3,000 km/s 30,000 km/s 30,000,000 m/s at the speed of lightarrow_forward
- Stars and Galaxies (MindTap Course List)PhysicsISBN:9781337399944Author:Michael A. SeedsPublisher:Cengage LearningFoundations of Astronomy (MindTap Course List)PhysicsISBN:9781337399920Author:Michael A. Seeds, Dana BackmanPublisher:Cengage Learning