Universe: Stars And Galaxies
6th Edition
ISBN: 9781319115098
Author: Roger Freedman, Robert Geller, William J. Kaufmann
Publisher: W. H. Freeman
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Chapter 1, Problem 29Q
To determine
(a)
To convert:
The distance from the earth to sun in light years.
To determine
(b)
The distance from the Earth to Sun in parsecs.
To determine
(c)
To discuss:
Whether light year or parsecs are useful units to express the distance between Earth and Sun.
Expert Solution & Answer
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Be sure to answer all parts.
Carry out the following conversions:
(a) 1.25 light-years to miles (a light-year is an astronomical measure of the distance
traveled by light in a year, or 365 days; the speed of light is 3.00 × 10° m/s)
x 10
mi
Enter your answer in scientific notation.
(b) 27.3 yd to centimeters
x 10
cm
Enter your answer in scientific notation.
(c) 2.7 × 1010 cm/s to ft/s
X 10
ft/s
Enter your answer in scientific notation.
Mars' period (its "year") was noted by Kepler to be about 687 days (Earth days), which is (687d /
365 d) = 1.88 yr. Determine the distance of Mars from the Sun using the Earth as reference.
(The distance of
Earth from the Sun is 1.50 x 10 m)
!3!
Thu
TMS
IMS
TE
TES
TES
TE
2 28 x 10 m
TES
yr
After reading and understanding the concept Gravity, please do the following problems:
1. What keeps a satellite up in its orbit around the Earth?
Using a single dimensional equation, estimate the number of steps it would take a person with a step length of 2.65 ft to walk from the Earth to Alpha Centauri a distance of 4.37 light-years. The speed of light is 1.86282 x 105 miles/s. Number of Steps = Enter your answer in accordance to the question statement x 1017
Chapter 1 Solutions
Universe: Stars And Galaxies
Ch. 1 - Prob. 1QCh. 1 - Prob. 2QCh. 1 - Prob. 3QCh. 1 - Prob. 4QCh. 1 - Prob. 5QCh. 1 - Prob. 6QCh. 1 - Prob. 7QCh. 1 - Prob. 8QCh. 1 - Prob. 9QCh. 1 - Prob. 10Q
Ch. 1 - Prob. 11QCh. 1 - Prob. 12QCh. 1 - Prob. 13QCh. 1 - Prob. 14QCh. 1 - Prob. 15QCh. 1 - Prob. 16QCh. 1 - Prob. 17QCh. 1 - Prob. 18QCh. 1 - Prob. 19QCh. 1 - Prob. 20QCh. 1 - Prob. 21QCh. 1 - Prob. 22QCh. 1 - Prob. 23QCh. 1 - Prob. 24QCh. 1 - Prob. 25QCh. 1 - Prob. 26QCh. 1 - Prob. 27QCh. 1 - Prob. 28QCh. 1 - Prob. 29QCh. 1 - Prob. 30QCh. 1 - Prob. 31QCh. 1 - Prob. 32QCh. 1 - Prob. 33QCh. 1 - Prob. 34QCh. 1 - Prob. 35QCh. 1 - Prob. 36QCh. 1 - Prob. 37QCh. 1 - Prob. 38QCh. 1 - Prob. 39QCh. 1 - Prob. 40QCh. 1 - Prob. 41QCh. 1 - Prob. 42Q
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- a method for determining the sizes of the orbits of pl from the sun than Earth. His method involved noting of days between the times that a planet was in the pc A and B in the diagram. Using this time and the num each planet's year, he calculated c and d. a. For Mars, c= 55.2 and d= 103.8. How far is Mars in astronomical units (AU)? One astronomical un the average distance from Earth to the center of th 93 million miles. b. For Jupiter, c 21.9 and d= 100.8. How far is Jup %3D sun in astronomical units? lo olpno er ort to rt .onte eteem-21 o to bre e ne ern 100 o ho aotem t elbl erl pnibioda lert pribiortarrow_forwardA light-year (ly) is the distance light travels in one year (at speed of 2.998 ×× 108 m/sm/s ). An astronomical unit (AU) is the average distance from the Sun to Earth, 1.50 ×× 108 km. 1 year = 3.156 ×× 107 s. How many meters are there in 1.70 ly? Express your answer using three significant figures. Express in scientific notation! 1.70 ly = _________________m How many AU are there in 1.70 ly light-year? Express your answer using three significant figures. Express in scientific notation! 1.70 ly = _________________AUarrow_forwardThe Earth is travelling around the sun at a speed of about 67,000 miles per hour [mph]. If it takes one year [yr] for the Earth to circle the Sun and we assume the Earth?s orbit is circular, what is the radius of the orbit in units of meters [m]? Use an appropriate SI prefix to report your answer so there are one, two, or three digits to the left of the decimal point.arrow_forward
- A new physics unit of distance is created and called the Zarkov. A student informs you 1 Zarkov (1 Za) is exactly equivalent to 8 inches. Convert 4.44 × 10 5 Z a 3 m i n u t e 2to m 3 h r 2. If hard to read: asking you to convert Zarkov's squared over minutes cubed to meters squared over hours cubed. Answer in E notation without units in the box. I am assuming your output units are m 3 h r 2. Note: for some numbers the computer will convert your E notion to another notation without the E...that will not cost you points. To be clear regarding E notation, I will provide an example of what I'm talking about:arrow_forwardSuppose f(x,y,z) = Ax2 + Bxy + Cxyz2. What is ▽f?arrow_forwardAll of 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. 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. (a) Alkaid and Merak are 25.6 apart in the earth’s sky. In a diagram, show the relative positions of Alkaid, Merak, and our sun. Find the distance in light-years from Alkaid to Merak. (b) To an inhabitant of a planet orbiting Merak, how many degrees apart in the sky would Alkaid and our sun be?arrow_forward
- I measured the angular separation of Jupiter's moons in arcminutes/arcseconds and converted this angle to radians. The conversion factor for degrees to radians was 57.3 degrees per radian. Which unit of measurement is larger? 1 degree or 1 radian?arrow_forwardThe length of cell A is 9×10^6 m. The length of cell B is 0.0000003 m. What is the ratio of cell A's length to cell B's length? Use pencil and paper. Is it easier to find the ratio when the numbers are expressed in scientific notation or in standard form? Explain your reasoning.arrow_forwardPlease look at my wrong answers, so you don’t accidentally get one of those numbers. I need the correct value of N. Thanks!arrow_forward
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