Physics: Principles with Applications
7th Edition
ISBN: 9780321625922
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Chapter 1, Problem 19P
A light-year is the distance light travels in one year (at speed=2.998×108 m/s).(a) How many meters are there in 1.00 light-year? (b) An astronomical unit (AU) is the average distance from the Sun to Earth, 1.50×108 km. How many AU are there in 1.00 light-year?
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A light-year is the distance light travels in one year (at speed 2.998 x 10^8 m/s). (a) How many meters are there in 1.00 light-year? (b) An astronomical unit (AU) is the average distance from the Sun to Earth, 1.50 X 10^8 km. How many AU are there in 1.00 light-year?
The speed of light is 2.998 × 108 m/s. One light-year is the distance that light travels in one year. One Astronomical Unit (AU) is 1.50 × 108 km.
(a) How many meters are in 1.0 light-year?
(b) How many meters are in 1.000 light-year?
(c) How many AU are in 1.00 light-year?
(d) What is the speed of light in AU/h?
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?
Chapter 1 Solutions
Physics: Principles with Applications
Ch. 1 - Prob. 1OQCh. 1 - Prob. 2OQCh. 1 - What are the merits and drawbacks of using a...Ch. 1 - What is wrong with this road sign: Memphis 7 mi(11...Ch. 1 - Why is it incorrect to think that the more digits...Ch. 1 - For an answer to be complete, the units need to be...Ch. 1 - 5. You measure the radius of a wheel to be 4.16...Ch. 1 - Express the sine of 30.0° with the correct number...Ch. 1 - List assumptions useful to estimate the numbers of...Ch. 1 - A student’s weight displayed on a digital scale is...
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- Roughly how many times longer than the mean life of an extremely unstable atomic nucleus is the lifetime of a human?arrow_forwardWhile a meter is the fundamental unit of length, most distances traveled by humans are measured in miles or kilometers. Why do you think this is?arrow_forwardIf the DNA strand in a molecule could be stretched out, it would have a length on the order of 2.0 m. What would this be in feet and inches?arrow_forward
- A 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_forwardA 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?arrow_forwardA light-year is the distance light travels in one year at speed =2.998*10^8m/s a) How many inches are there in 1.00 light-year? (b) The parsec is an astronomical unit of length approximately equal to 3.08×1016 m. How many light-years are there in 1.00 parsec?arrow_forward
- The micrometer (1 µm) is often called the micron. (a) How many microns make up 4.0 km? µm (b) What fraction of a centimeter equals 7.0 µm? (c) How many microns are in 5.0 yd? µmarrow_forward. The average distance between Earth and the Sun is 1.5×1011m.1.5×1011m. (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? Thank youarrow_forwardI have tried 16.7x10^3, 16.7x10^4, and 1.365x10^8 and those are all wrong for the first part. I know that the second part is 14.3 hr. I need to know the km/s. Thank you!!arrow_forward
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