21st Century Astronomy And Learning Astronomy By Doing Astronomy (fifth Edition)
5th Edition
ISBN: 9780393613360
Author: Laura Kay, Ana Larson, Stacy Palen, George Blumenthal
Publisher: W. W. Norton & Company
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Chapter 2.2, Problem 2.3CYU
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2. Give two reasons why it is warmer in summer than in winter. Explain how these two
effects cause earth’s seasons.
12 Which of these statements is false?
A Seasons are caused by variations in Earth's distance from the sun
Seasons are opposite in the Northern and Southern Hemispheres
The earth's slightly varying orbital distance has virtually no effect on the weather
B
C
D
E
The real cause of the seasons is the earth's axis tilt
The two hemispheres of the earth take turns being tipped towards the sun over the course of each year
Each year, the radius of the moon’s orbit increases by about 3.8 cm. How does this change affect the length of a month?A. A month gets longer.B. A month gets shorter.C. The length of a month stays the same.
Chapter 2 Solutions
21st Century Astronomy And Learning Astronomy By Doing Astronomy (fifth Edition)
Ch. 2.1 - Prob. 2.1CYUCh. 2.1 - Prob. 2.2CYUCh. 2.2 - Prob. 2.3CYUCh. 2.3 - Prob. 2.4CYUCh. 2.4 - Prob. 2.5CYUCh. 2.5 - Prob. 2.6CYUCh. 2 - Prob. 1QPCh. 2 - Prob. 2QPCh. 2 - Prob. 3QPCh. 2 - Prob. 4QP
Ch. 2 - Prob. 5QPCh. 2 - Prob. 6QPCh. 2 - Prob. 7QPCh. 2 - Prob. 8QPCh. 2 - Prob. 9QPCh. 2 - Prob. 10QPCh. 2 - Prob. 11QPCh. 2 - Prob. 12QPCh. 2 - Prob. 13QPCh. 2 - Prob. 14QPCh. 2 - Prob. 15QPCh. 2 - Prob. 16QPCh. 2 - Prob. 17QPCh. 2 - Prob. 18QPCh. 2 - Prob. 19QPCh. 2 - Prob. 20QPCh. 2 - Prob. 21QPCh. 2 - Prob. 22QPCh. 2 - Prob. 23QPCh. 2 - Prob. 24QPCh. 2 - Prob. 25QPCh. 2 - Prob. 26QPCh. 2 - Prob. 27QPCh. 2 - Prob. 28QPCh. 2 - Prob. 29QPCh. 2 - Prob. 30QPCh. 2 - Prob. 31QPCh. 2 - Prob. 33QPCh. 2 - Prob. 34QPCh. 2 - Prob. 35QPCh. 2 - Prob. 36QPCh. 2 - Prob. 37QPCh. 2 - Prob. 38QPCh. 2 - Prob. 39QPCh. 2 - Prob. 40QPCh. 2 - Prob. 41QPCh. 2 - Prob. 42QPCh. 2 - Prob. 43QPCh. 2 - Prob. 44QPCh. 2 - Prob. 45QP
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- Why are the seasons reversed in the Southern Hemisphere relative to the Northern Hemisphere?arrow_forwardWhat is the altitude of the Sun when it is just rising in the East? (15.4) (a) 90 (b) 0 (a) 180 (a) 45arrow_forward2. Show that the divergence of the geostrophic wind is – v,(cot $)/a if the variations in fwith latitude are accounted for (i.e., use the full definition of the Coriolis parameter f = 2.0 sin p). To derive this relationship, recall that on a spherical planet, the distance north is y = aø, where ø is latitude (in radians) and a is the radius of Earth (6,370,000 m). Thus, a derivative in y can be expressed as a derivative in latitude o via the following relationship: a 1 a ду а дфarrow_forward
- B7arrow_forward8. Describe how the seasons would be different if the Earth's axis of rotation, rather than having its present 23.5° tilt, were tilted by: a) 0° b) 90°.arrow_forwardMonthly average wind speed values and standard deviations are given below for 30 m height. a. Calculate the average wind speeds for summer, autumn, winter and spring. b. By using the Empirical Method, calculate the Shape factor, k and Scale factor, c in the Weibull distribution for each season. c. Calculate the Wind Power Density for winter. d. Calculate the Wind Energy Density for winter. Month Average wind speed at 30 m, m/sec Standard deviation, 6 June 2012 3.6200 1.88 July 2012 3.8133 1.98 August 2012 3.7700 1.96 September 2012 2.7055 1.40 October 2012 2.4668 1.28 November 2012 2.3668 1.23 December 2012 3.5441 1.84 January 2013 3.8812 2.02 February 2013 3.5094 1.83 March 2013 4.1341 2.15 April 2013 3.3659 1.75 May 2013 2.7908 1.45arrow_forward
- 1. Calculate the zenith angle at solar noon at a latitude of 40° N on January 19.arrow_forwardQUESTION 3 The surface of Venus receives a. a lot more sunlight than the surface of the Earth b. much less sunlight than the surface of the Earth c. about as much sunlight as the surface of the Earth QUESTION 4 Venus has very low surface wind speed because a. the greenhouse effect makes the surface temperature nearly uniform b. it has a very thin atmosphere c. the thick clouds don't allow for much convection in the atmosphere d. it doesn't have a large moonarrow_forward6 Jupiter's polar temperatures are similar to its equatorial temperatures mainly because of two reasons. What are these reasons? A Because Jupiter has no appreciable axis tilt and because Jupiter has a warm interior. Because Jupiter is fairly round, has no appreciable axis tilt, and has a warm interior. C Because Jupiter is fairly round and because Jupiter has a warm interior. (D) None of the mentioned choices is correct. E Because Jupiter has no appreciable axis tilt and because Jupiter is fairly round in shape. Barrow_forward
- Why is a sidereal day shorter than a solar day? O A. precession of Earth's axis B. the non-circular orbit of Earth around the Sun C. the tilt of Earth's axis D. the combined effect of the rotation of Earth and its orbit about the Sun E. Earth year being a non-integer number of Earth daysarrow_forwardThe friction created when tidal forces move ocean waters over the seabeds a. causes the lunar phases. b. slows the rotation of Earth, gradually making the days longer c. forces the moon to approach Earth. d. has no effect on Earth. e. has no effect on the moon.arrow_forwardThat the moon has no magnetic field implies that a. the moon is spinning too slowly to produce a magnetic field. b. the interior of the moon is too hot to produce a magnetic field. c. the crust of the moon is so thick that the magnetic field can not get out of the interior. d. the moon’s core contains little if any molten iron. e. the moon is moving further from Earth.arrow_forward
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