University Physics Volume 1
18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: OpenStax - Rice University
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Textbook Question
Chapter 1, Problem 61P
Roughly how many solar systems would it take to tile the disk of the Milky Way?
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Astronomers frequently say that “there are more stars in the universe than there are grains of sand on all the beaches on the earth”. Given that a typical grain of sand is about 0.5 – 1.0 mm in diameter, estimate the number of grains of sand on all the earth’s beaches. The diameter of the Earth is 12,742 km.
The Sun and the planets of the solar system are located in a spiral galaxy , called the Milky Way .
Which numbered area on the model best represents the location of the Sun in this galaxy ?
Thinking about the Scale of the Solar System As we discussed, the radius of the Earth is approximately 6370 km. The Sun, on the other hand, is approximately 700,000 km in radius and located, on average, one astronomical unit (1 au=1.5x108 km) from the Earth. Imagine that you stand near Mansueto Library, at the corner of 57th and Ellis. You hold a standard desk globe, which has a diameter of 12 inches, and you want to build a model of the Sun, Earth, and their separation that keeps all sizes and lengths in proportion to one another. a) How big would the Sun be in this scale model? Give your answer in feet and meters. b) The nearest star to the Solar System outside of the Sun is Proxima Centauri, which is approximately 4.2 light years away (a light year is the distance light travels in one year, or approximately 9.5x1012 km). Given the scale model outlined above, how far would a model Proxima Centauri be placed from you? Give your answer in miles and km.
Chapter 1 Solutions
University Physics Volume 1
Ch. 1 - Check Your Understanding Restate 4.79105kg using a...Ch. 1 - Check Your Understanding Light navels about 9 Pm...Ch. 1 - Check Your Understanding We know horn Figure 1.4...Ch. 1 - Check Your Understanding Given that 1 lb (pound)...Ch. 1 - Check Your Understanding Suppose we want the...Ch. 1 - Check Your Understanding Is the equation...Ch. 1 - Check Your Understanding Figure 1.4 says the mass...Ch. 1 - Check Your Understanding A high school track coach...Ch. 1 - The Scope and Scale of Physics What is physics?Ch. 1 - The Scope and Scale of Physics Some have described...
Ch. 1 - The Scope and Scale of Physics If two different...Ch. 1 - The Scope and Scale of Physics What determines the...Ch. 1 - The Scope and Scale of Physics Certain criteria...Ch. 1 - The Scope and Scale of Physics Can the validity of...Ch. 1 - Units and Standards Identify some advantages of...Ch. 1 - Units and Standards What are the SI base units of...Ch. 1 - Units and Standards What is the difference between...Ch. 1 - For each of the following scenarios, refer to...Ch. 1 - Significant Figures (a) What is the relationship...Ch. 1 - Solving Problems in Physics What information do...Ch. 1 - Solving Problems in Physics What should you do...Ch. 1 - The Scope and Scale of Physics Find the order of...Ch. 1 - Use the orders of magnitude you found in the...Ch. 1 - Roughly how many heartbeats are there in a...Ch. 1 - A generation is about one-third of a lifetime....Ch. 1 - Roughly how many times longer than the mean life...Ch. 1 - Calculate the approximate number of atoms in a...Ch. 1 - (a) Calculate the number of cells in a hummingbird...Ch. 1 - Assuming one nerve impulse must end before another...Ch. 1 - About how many floating-point operations can a...Ch. 1 - Roughly how many floating-point operations can a...Ch. 1 - The following times are given using metric...Ch. 1 - The following times are given in seconds. Use...Ch. 1 - The following lengths are given using metric...Ch. 1 - The following lengths are given in meters. Use...Ch. 1 - The following masses are written using metric...Ch. 1 - The following masses are given in kilograms. Use...Ch. 1 - The volume of Earth is on the order of 1021m3 ....Ch. 1 - The speed limit on some interstate highways is...Ch. 1 - A car is traveling at a speed of 33 m/s. (a) What...Ch. 1 - In SI units, speeds are measured in meters per...Ch. 1 - American football is played on a 100-yd-long...Ch. 1 - Soccer fields vary in size. A large soccer field...Ch. 1 - What is the height in meters of a person who is...Ch. 1 - Mount Everest, at 29,028ft , is the tallest...Ch. 1 - The speed of sound is measured to be 342 m/s on a...Ch. 1 - Tectonic plates are large segments of Earth’s mist...Ch. 1 - The average distance between Earth and the Sun is...Ch. 1 - The density of nuclear matter is about 1018kg/m3 ....Ch. 1 - The density of aluminum Is 2.7g/cm3 . What is the...Ch. 1 - A commonly used turn of mass in the English system...Ch. 1 - A furlong is 220 yd. A fortnight is 2 weeks....Ch. 1 - It takes 2 radians (rad) to get around a circle,...Ch. 1 - Light travels a distance of about 3108m/s . A...Ch. 1 - A light-nanosecond is the distance light travels...Ch. 1 - An electron has a mass of 9.1110-31kg . A proton...Ch. 1 - A fluid ounce is about 30mL. What is the voIume of...Ch. 1 - A student is trying to remember some formulas from...Ch. 1 - Consider the physical quantities s,v,a, and t with...Ch. 1 - Consider the physical quantities m,s,v,a, and t...Ch. 1 - Suppose quantity s is a length and quantity t is a...Ch. 1 - Suppose [V]=L3,[]=ML3, and [t]=T . (a) What is the...Ch. 1 - The arc length formula says the length sof arc...Ch. 1 - Estimates and Fermi Calculations Assuming the...Ch. 1 - Assuming the human body is primarily made of...Ch. 1 - Estimate the mass of air in a classroom.Ch. 1 - Estimate the number of molecules that make up...Ch. 1 - Estimate the surface area of a person.Ch. 1 - Roughly how many solar systems would it take to...Ch. 1 - (a) Estimate the density of the Moon. (b) Estimate...Ch. 1 - The average density of the Sun is on the order...Ch. 1 - Estimate the mass of a virus.Ch. 1 - A floating-point operation is a single arithmetic...Ch. 1 - Consider the equation 4000/400=10.0 . Assuming the...Ch. 1 - Suppose your bathroom scale reads your mass as 65...Ch. 1 - A good-quality measuring tape can be off by 0.50cm...Ch. 1 - An infant’s pulse rate is measured to be 1305...Ch. 1 - (a) Suppose that a person has an average heart...Ch. 1 - A can contains 375 mL of soda. How much is left...Ch. 1 - State how many significant figures are proper In...Ch. 1 - (a) How many significant figures are in the...Ch. 1 - (a) If your speedometer has an uncertainty of 2.0...Ch. 1 - (a) A person’s blood pressure is measured to be...Ch. 1 - A person measures his or her heart rate by...Ch. 1 - What is the area of a circle 3.102 cm in diameter?Ch. 1 - Determine the number of significant figures in the...Ch. 1 - Perform the following calculations and express...Ch. 1 - Consider the equation y=mt+b, where the dimension...Ch. 1 - Consider the equation...Ch. 1 - (a) A car speedometer has a 5% uncertainty. What...Ch. 1 - A marathon runner completes a 42.188-km course in...Ch. 1 - The sides of a small rectangular box are measured...Ch. 1 - When nonmetric units we used in the United...Ch. 1 - The length and width of a rectangular room are...Ch. 1 - A car engine moves a piston with a circular...Ch. 1 - The first atomic bomb was detonated on July 16,...Ch. 1 - The purpose of this problem is to show the entire...
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