Horizons: Exploring the Universe (MindTap Course List)
14th Edition
ISBN: 9781305960961
Author: Michael A. Seeds, Dana Backman
Publisher: Cengage Learning
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Chapter 1, Problem 8P
How long does it take light to cross the diameter of our Milky Way Galaxy?
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Problem 31.66 3 of 3 Review Introduction Consider current I passing through a resistor of radius r , length L , and resistance R .
Part A Determine the electric field at the surface of the resistor. Assume that the electric field is uniform throughout, including at the surface. Express your answer in terms of some, all, or none of the variables I , R , L , r . E =
Part B Determine the magnetic field at the surface of the resistor. Assume that the electric field is uniform throughout, including at the surface.
Express your answer in terms of some, all, or none of the variables I, R, L, r, and the constants π, μ0.
Part C Determine the strength of the Poynting vector at the surface of the resistor.
Express your answer in terms of some, all, or none of the variables I, R, L, r, and the appropriate constants.
Part D
Determine the flux of the Poynting vector (i.e., the integral of S⃗ ⋅dA⃗ ) over the surface of the resistor.
Express your answer in terms of some, all, or none of the…
Steel train rails are laid in 15.0-m-long segments placed end to end. The rails are laid on a winter day when their
temperature is -1.0 °C.
Part A
How much space must be left between adjacent rails if they are just to touch on a summer day when their
temperature is 34.0°C?
Express your answer to two significant figures and include the appropriate units.
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D= 0.0072
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Part B
If the rails are originally laid in contact, what is the stress in them on a summer day when their temperature is
34.0°C?
Express your answer using two significant figures. Enter positive value if the stress is tensile and negative
value if the stress is compressive.
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Chapter 1 Solutions
Horizons: Exploring the Universe (MindTap Course List)
Ch. 1 - What is the largest dimension of which you have...Ch. 1 - What is the difference between our Solar System,...Ch. 1 - Why are light-years more convenient than miles,...Ch. 1 - Why is it difficult to detect planets orbiting...Ch. 1 - Prob. 5RQCh. 1 - What is the difference between the Milky Way and...Ch. 1 - What are the largest known structures in the...Ch. 1 - Prob. 8RQCh. 1 - How Do We Know? How does the scientific method...Ch. 1 - You and three of your friends have won an...
Ch. 1 - Think back to the last time you got a new phone...Ch. 1 - The diameter of Earth across the equator is 7928...Ch. 1 - The diameter of the Moon across its equator is...Ch. 1 - One astronomical unit is about 1.50108 km. Explain...Ch. 1 - Venus orbits 0.72 AU from the Sun. What is that...Ch. 1 - Light from the Sun takes 8 minutes to reach Earth....Ch. 1 - The Sun is almost 400 times farther from Earth...Ch. 1 - If the speed of light is 3.00105 km/s. how many...Ch. 1 - How long does it take light to cross the diameter...Ch. 1 - The nearest large galaxy to our n is about 2.5...Ch. 1 - How many galaxies like our own would it take Laid...Ch. 1 - In Figure 1-4, the division between daylight and...Ch. 1 - Prob. 2LTLCh. 1 - Prob. 3LTLCh. 1 - Prob. 4LTL
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