The Cosmic Perspective Fundamentals (2nd Edition)
The Cosmic Perspective Fundamentals (2nd Edition)
2nd Edition
ISBN: 9780133889567
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 2, Problem 3QQ

Choose the best answer to each of the following. Explain your reasoning.

Which of the following is not true during Northern Hemisphere summer? (a) Sunlight strikes the ground at a steeper angle in the Northern Hemisphere that it does in the Southern Hemisphere. (b) The Sun follows a longer and higher path through the Northern Hemisphere sky than it does through the Southern Hemisphere sky. (c) Noontime shadows are longer in the Northern Hemisphere that in the Southern Hemisphere.

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Would like answers for part B and C ONLY please-need info from part a to answer them. I already solved part a) 1)Energy Efficiency at Home : ​Suppose you have two kettles – a plug-in electrickettle and a stovetop kettle. The electric kettle uses electricity from a natural gas fired powerplant, while you boil water in your stovetop kettle on a natural gas burner. a)Based on the following information, which of these kettles demonstrates a higher energy efficiency (i.e., which is more efficient at using energy from fuel to heat water)? Please calculate the efficiencies of each kettle and express answers as percentages. ​ -The natural gas power plant converts chemical energy of the natural gas to electrical energy with 58% efficiency. -High-voltage power lines from the power plant to your house convey electricity with 92% efficiency. -The electric kettle converts electrical energy to thermal energy in the water with 85% efficiency (the other 15% heats up the kettle itself). -The stove…
Problem 2. Planetary Body Composition:  Density (Links to an external site.) of the Earth  (Palen, et. al., 1st Edition,  Chapter 6, problem 70) Earth’s mean (Links to an external site.) radius is 6,378 km and its mass is 5.97 x 1024 kg. CALCULATE Earth’s average (Links to an external site.) density. SHOW YOUR WORK. DO NOT LOOK UP THIS VALUE! The average density of Earth’s crust is 2,600 kg/m3. What does this tell you about Earth’s interior?
Express your final answers accurate to four decimal places; avoid rounding off intermediate values in the solutions to avoid deviation due to rounding-off within the solution. USE ENG NOTATIONS
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