The Physical Universe
15th Edition
ISBN: 9780073513928
Author: Konrad Krauskopf, Arthur Beiser
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 1, Problem 10MC
To determine
Why leap year is needed.
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The tropical year, the time from vernal equinox to the next vernal equinox, is the basis for our calendar. It contains 365.242199 days. Find the number of seconds in three tropical years.
49 31557000
1. The average distance between Earth and the Sun is 1.5 × 108 km.
(a) Calculate the average speed of Earth in its orbit (assumed to be circular) in meters
per second.
(b) What is this speed in miles per hour?
All the stars of the Big Dipper (part of the constellation Ursa Major) may appear to
be the same distance from the earth, but in fact they are very far from each other.
the figure shows the
distances from the
earth to each of these
stars. The distances
are given in light-years
(ly), the distance that
light travels in one year.
One light-year equals
9.461 × 1015 m..
Dubhe
105 ly
Megrez
81 ly
Mizar
73 ly
Alioth
Merak
64 ly
ע דר
Alkaid
Phad
138 ly
80 ly
Part A
Alkaid and Merak are 25.6° apart in the earth's sky. Find the distance in light-
years from Alkaid to Merak.
Express your answer in light-years.
ΑΣφ
?
ly
Submit
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Part B
To an inhabitant of a planet orbiting Merak, how many degrees apart in the sky
would Alkaid and our sun be?
Express your answer in degrees.
?
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Chapter 1 Solutions
The Physical Universe
Ch. 1 - The scientific method is a. continuing process b....Ch. 1 - A scientific law or theory is valid a. forever b....Ch. 1 - A hypothesis is a. a new scientific idea b. a...Ch. 1 - The ongoing evolution of living things a. is one...Ch. 1 - The object in the sky that apparently moves least...Ch. 1 - A constellation is a. an especially bright star b....Ch. 1 - Which of the following is no longer considered...Ch. 1 - A planet not visible to the naked eye is a. Mars...Ch. 1 - The planet closest to the sun is a. earth b. Venus...Ch. 1 - Prob. 10MC
Ch. 1 - Kepler modified the copernican system by showing...Ch. 1 - The speed of a planet in its orbit around the sun...Ch. 1 - According to Keplers third law, the time needed...Ch. 1 - The law of gravity a. applies only to large bodies...Ch. 1 - The earth bulges slightly at the equator and is...Ch. 1 - The usual tidal pattern in most parts of the world...Ch. 1 - Tides are caused a. only by the sun b. only by the...Ch. 1 - High tide occurs at a given place a. only when the...Ch. 1 - The prefix micro stands for a. 1/10 b. 1/100 c....Ch. 1 - A centimeter is a. 0.001 m b. 0.01 m c. 0.1 m d....Ch. 1 - Of the following, the shortest is a. 1 mm b. 0.01...Ch. 1 - Of the following, the longest is a. 1000 ft b. 500...Ch. 1 - A person is 180 cm tall. This is equivalent to a....Ch. 1 - The measurements of a room are given as length =...Ch. 1 - Prob. 1ECh. 1 - Prob. 2ECh. 1 - What is the difference between a hypothesis and a...Ch. 1 - Prob. 4ECh. 1 - According to the physicist Richard Feynman,...Ch. 1 - What does a year correspond to in terms of...Ch. 1 - You are lost in the northern hemisphere in the...Ch. 1 - In terms of what you would actually observe, what...Ch. 1 - What must be your location if the stars move...Ch. 1 - How do leap years fit into the ptolemaic system?...Ch. 1 - From observations of the moon, why would you...Ch. 1 - The sun, moon, and planets all follow...Ch. 1 - What is the basic difference between the ptolemaic...Ch. 1 - Ancient astronomers were troubled by variations in...Ch. 1 - Compare the ptolemaic and copernican explanations...Ch. 1 - What do you think is the reason scientists use an...Ch. 1 - The average distance from the earth to the sun is...Ch. 1 - As the earth revolves around the sun, some stars...Ch. 1 - Why is gravity considered a fundamental force...Ch. 1 - What, if anything, would happen to the shape of...Ch. 1 - What is the difference between spring and neap...Ch. 1 - The length of the day has varied. When did the...Ch. 1 - The earth takes almost exactly 24 h to make a...Ch. 1 - Does the sun or the moon have the greater...Ch. 1 - In the following pairs of length units, which is...Ch. 1 - A European driving from Paris to Brussels finds...Ch. 1 - The worlds tallest tree is a sequoia in California...Ch. 1 - The diameter of an atom is roughly 104 times the...Ch. 1 - How many square feet are there in an area of 1.00...Ch. 1 - A swimming pool is 20.00 m long, 7.00 m wide, and...Ch. 1 - The speedometer of a European car gives its speed...Ch. 1 - A horse galloped a mile in 2 min 35 s. What was...Ch. 1 - How many microphones are there in a megaphone?Ch. 1 - Use the proper number of significant figures to...Ch. 1 - Prob. 35E
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- 1. A car starts driving at noon (t = 0) and drives at exactly 50 miles per hour until 4pm (t = 4). (b) Sketch a graph of the car's speed (in miles per hour) vs its time (in hours). Shade in the area below your graph, between t = 0 and t = 4. 1 (c) Explain why this area is equivalent to the answer to the "how far did the car drive?" question.arrow_forward1. Write the answers for the following in scientific notation with three significant digits. a. The earth's circumference, measured through the poles, is exactly 40, 000, 000 m (according to an early standard of the meter). What is the radius of the earth, R? R = m. b. The surface area of the earth is given by A = 4 x R². What is the area A? A = m². c. Using the units conversion 1 inch = 2.54 cm, convert the volume V = 302 in³ into a volume in cubic cm (cm³) and in liters. (1 L = 1000 cm³). Show your steps in below! V = cm³ = L.arrow_forwardUntil 1883, every city and town in the United States kept its own local time. Today, travelers reset their watches only when the time change equals 1.0 h. How far, on the average, must you travel in degrees of longitude between the time-zone boundaries at which your watch must be reset by 1.0 h? (Hint: Earth rotates 360° in about 24 h.)arrow_forward
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- Until 1883, every city and town in the United States kept its own local time. Today, travelers reset their watches only when the time change equals 1.0 h. How far, on average, must you travel in degrees of longitude between the time zone boundaries at which your watch must be reset by 1.0 h? (Hint: The Earth rotates 360° in about 24 h.)arrow_forwardA fishing boat leaves a marina and follows a course of S64°W at 9 knots for 20 min. Then the boat changes to a new course of S40°W at 2 knots for 2 hr. Round intermediate steps to four decimal places. Part: 0 / 2 Part 1 of 2 (a) How far is the boat from the marina? Round the answer to one decimal place if necessary. The boat is approximately nmi from the marina. X 3arrow_forwardHow many seconds are there in 1.00 year? Assume it is a leap year.arrow_forward
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