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 1.2CYU
Check Your Understanding Light navels about 9 Pm in a year. Given that a year is about
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A light-year is a measure of the astronomical distance that light traverses in a vacuum in 1 year.
(a) How many kilometers does light traverse in 1 ly?
km
(b) What is the speed of light c in terms of ly per year.
ly/y
(c) Express your answer from (b) in terms of feet per nanosecond.
ft/ns
A light-year is the distance light travels in one year (at speed = 2.998 ? 108 ?⁄?) (a) How manymeters are there in 1.00 light-year? (b) An astronomical unit (AU) is the average distance from the Sunto Earth, 1.50 ? 108 ??. How many AU are there in 1.00 light-year?
A light-year is a unit of distance corresponding to the distance light can travel in a vacuum in 1 year. If the speed of light is 3.0 x 108 m/s, what is the length of a light-year in: (a) km? (b) Em?
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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- Roughly how many heartbeats are there in a lifetime?arrow_forwardRoughly how many times longer than the mean life of an extremely unstable atomic nucleus is the lifetime of a human?arrow_forwardIn SI units, speeds are measured in meters per second (m/s). But, depending on where you live, you’re probably mole comfortable of thinking of speeds in terms of either kilometers per hour (km/h) or miles per hour (mi/h). In this problem, you will see that 1 m/s is roughly 4 km/h or 2 mi/h, which is handy to use when developing your physical Intuition. More precisely, show that (a) 1.0m/s=3.6km/h and 1.0m/s=2.2mi/h .arrow_forward
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