Modified Mastering Physics With Pearson Etext -- Standalone Access Card -- For Physics For Scientists & Engineers With Modern Physics (5th Edition)
5th Edition
ISBN: 9780134402628
Author: Douglas C. Giancoli
Publisher: PEARSON
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Chapter 44, Problem 2Q
To determine
The aftermath situation of the stars when it begins to generate more energy than it
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As a star becomes a giant, its outer layers are expanding and the pressure consequently drops in the
outer atmosphere. Where does the energy for expanding these layers come from?
O from a magnetic dynamo effect in the star's outer layers, caused by a much stronger magnetic field inside the star
O from the fusion of hydrogen into helium in a shell around the core
O from an explosion in the core
O from the fusion of helium into carbon in the core.
O from the long-term fusion of hydrogen into helium in the core
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A black body radiates energy at the rate of 1×105J/s×m2 at temperature of 227∘C.The temperature to which it must be heated so that it radiates energy at rate of 1×109J/sm2 is?
The sun has a radius of 6.959 × 108 m and a surface temperature of 5.81 x 10° K.
When the sun radiates at a rate of 3.91 x 1026 W and is a perfect emitter. What is
the rate of energy emitted per square meter? Stefan-Boltzmann constant is 5.67 x
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Chapter 44 Solutions
Modified Mastering Physics With Pearson Etext -- Standalone Access Card -- For Physics For Scientists & Engineers With Modern Physics (5th Edition)
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- 111arrow_forwardThe mass of the sun is 2.0 x 1030 kg, and the mass of a hydrogen atom is 1.67 x 10-27 kg. If we assume that the sun is mostly composed of hydrogen, how many atoms are there in the sun?arrow_forwardExplain how we can determine the temperature of a star without going there.arrow_forward
- !arrow_forwardA speck of carbon dust may contain as many as 30 billion atoms of carbon, each atom having a mass of 2.00 x 10-23 grams. Suppose the mass of all the atoms in a speck of carbon dust were converted entirely to energy and applied to the kinetic energy of a baseball. How fast would the baseball be moving? (Mass of baseball = 0.145 kg. ) (1 gram = 1 x 103kg) (KE = ½ mv2) (1 billion = 1 x 109)arrow_forwardI asked this question already but the answer was wrong and I couldn't follow along with the work so I was hoping you could try again A Sun-like star has a power output of 3.1·1026 W with 87.3% of this energy supplied by the proton-proton chain. How many protons are consumed per second in the core of this star?arrow_forward
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