Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 12, Problem 21CQ
To determine
The explain the light arriving at earth leave from the star.
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A light-year is the distance that light can travel in one year. Similarly, we can define a light-second, light-day, etc. as the distance that light can travel in other time intervals. Calculate the distance represented by each of the following: (Assume that the speed of light is 3 x 10^8m/s)
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You take a round trip to the star Sirius, a distance of 8.6 light years away, on board a spacecraft traveling at 99% the speed of light. When you return to Earth, 17.2 years have elapsed on Earth. But due to Einstein's theory of relativity, you will have aged by
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Chapter 12 Solutions
Integrated Science
Ch. 12.1 - Stars twinkle and planets do not twinkle because...Ch. 12.6 - Prob. 2SCCh. 12.6 - Prob. 3SCCh. 12.6 - Prob. 4SCCh. 12.6 - Prob. 5SCCh. 12.6 - Prob. 6SCCh. 12.6 - Prob. 7SCCh. 12.6 - Prob. 8SCCh. 12.7 - Prob. 9SCCh. 12.7 - Prob. 10SC
Ch. 12.7 - Prob. 11SCCh. 12.7 - Prob. 12SCCh. 12 - What is a light-year, and how is it defined?Ch. 12 - Prob. 2CQCh. 12 - Prob. 3CQCh. 12 - What is the Hertzsprung-Russell diagram?Ch. 12 - Prob. 5CQCh. 12 - Prob. 6CQCh. 12 - Prob. 7CQCh. 12 - Prob. 8CQCh. 12 - Prob. 9CQCh. 12 - Prob. 10CQCh. 12 - Prob. 11CQCh. 12 - Prob. 12CQCh. 12 - Prob. 13CQCh. 12 - Prob. 14CQCh. 12 - Prob. 15CQCh. 12 - Prob. 16CQCh. 12 - Prob. 17CQCh. 12 - Prob. 18CQCh. 12 - Prob. 19CQCh. 12 - Prob. 20CQCh. 12 - Prob. 21CQCh. 12 - Prob. 22CQCh. 12 - Analyze when apparent magnitude is a better scale...Ch. 12 - Prob. 24CQCh. 12 - Prob. 25CQCh. 12 - Prob. 1PEACh. 12 - Prob. 2PEACh. 12 - Prob. 3PEACh. 12 - Prob. 4PEACh. 12 - Prob. 5PEACh. 12 - Prob. 6PEACh. 12 - Prob. 7PEACh. 12 - Prob. 8PEACh. 12 - Prob. 9PEACh. 12 - Prob. 10PEACh. 12 - Prob. 11PEACh. 12 - Prob. 1PEBCh. 12 - Prob. 2PEBCh. 12 - Prob. 3PEBCh. 12 - Prob. 4PEBCh. 12 - Prob. 5PEBCh. 12 - Prob. 6PEBCh. 12 - Prob. 7PEBCh. 12 - Prob. 8PEBCh. 12 - Prob. 9PEBCh. 12 - Prob. 10PEBCh. 12 - Prob. 11PEB
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- A light-year is the distance that light can travel in one year. Similarly, we can define a light-second, light-day, etc. as the distance that light can travel in other time intervals. Calculate the distance represented by each of the following: (Assume that the speed of light is 3 × 108 m/s). 1. 4 light-seconds 2. 3 light-minutes 3. 2 light-days 4. 2 light-days, but this time answer in miles (enter just the number with no units)arrow_forwardAs measured on Earth the star Fomalhaut is 25.1 light years away. As measured by the crew of a spaceship that flies to Fomalhaut, the distance is 8.6 light years. In years, calculate the duration of the trip as measured by the crew of the ship.(Give your answer in years but don't include the units.)arrow_forwardThe meter was redefined as a reference to Earth, then to krypton, and finally to the speed of light. Why do you think the reference point for a meter continued to change?arrow_forward
- Suppose we find an Earth-like planet around one of our nearest stellar neighbors, Alpha Centauri (located only 4.4 light-years away). If we launched a "generation ship" at a constant speed of 1500.00 km/s from Earth with a group of people whose descendants will explore and colonize this planet, how many years before the generation ship reached Alpha Centauri? (Note there are 9.46 ××1012 km in a light-year and 31.6 million seconds in a year.arrow_forwardThe Millennium Falcon is approximately 35.2 m long. There are conflicting reports, but the Falcon made the Kessel Run in approximately 12.27 parsecs. This is an odd unit to measure speed with as a parsec is a unit of length equal to 3.26 light-year. The science FICTION comes in when you consider that ships in Star Wars use hyperdrive to travel faster than the speed of light, so they are able to make jumps through space. Han Solo picked difficult or dangerous points to jump between to make the trip so short. Let's imagine that the Millennium Falcon travels at 0.96c during the 12.27 parsec Kessel Run. What distance, in light-year, does an observer at the finish line measure for the trip? Don't forget to convert parsec to light-year. X light-year What distance, in light-year, does Han Solo measure for the trip as he pilots the ship? light-year Which person measures the proper distance of the trip? Which person would measure the proper length of the Millennium Falcon?arrow_forwardA light year (LY) is the distance that light travels in one year. 1 LY = 9.46x1015 m. Suppose we have detected a planet that orbits a star that is 104 light years away. How many millions of years would it take us to get there if we used a modern rocket with a maximum speed of 20.0 km/s (about 45,000 mph)? Assume 3 sig figs.arrow_forward
- The star Sirius A is 8.66 light-years from Earth. Imagine a spaceship that travels from Earth to Sirius A at a constant speed of 0.951c. On Earth, we would measure the time it takes for the ship to reach the star to be (8.66 ly/0.951c)=9.11 years (a) How much time (in years) would it take the ship to travel from the Earth to the star as measured by an astronaut aboard the ship? (b) What is the distance to the star (in light years) as measured by an astronaut aboard the ship?arrow_forwardThe Millennium Falcon is approximately 35.2 m long. There are conflicting reports, but the Fàlcon made the Kessel Run in approximately 12.95 parsecs. This is an odd unit to measure speed with as a parsec is a unit of length equal to 3.26 light-year. The science FICTION comes in when you consider that ships in Star Wars use hyperdrive to travel faster than the speed of light, so they are able to make jumps through space. Han Solo picked difficult or dangerous points to jump between to make the trip so short.tet's imagine that the Millennium Falcon travels at 0.95c during the 12.95 parsec Kessel Run. What distance, in light-year, does an observer at the finish line measure for the trip? Don't forget to convert parsec to light-year. light-year What distance, in light-year, does Han Solo measure for the trip as he pilots the ship? | light-yeararrow_forwardAs measured on Earth the star Fomalhaut is 25.1 light years away. As measured by the crew of a spaceship that flies to Fomalhaut, the distance is 7.1 light years. In years, calculate the duration of the trip as measured by the crew of the ship.arrow_forward
- If there are 3x10^7 seconds in one year, a distance of one light year is equal to: 9 x 10^15 m 9 x 10^13 m 9 x 10^11 m O 9 x 10^9 marrow_forwardA star has an element in its atmosphere that normally emits a line of frequency fs = 7.5 x 10^14 vib/s. If astronomers measure the frequency of this line to be fo = 7.7 x 10^14 vib/s, then how fast are the Earth and this star traveling relative to each other? Remember that the correct equation for the speed v is given by v = [(fo^2 - fs^2) / (fo^2 + fs^2)] c Remember fo^2 means "fo squared."arrow_forwardAs measured on Earth the star Fomalhaut is 25.1 light years away. As measured by the crew of a spaceship that flies to Fomalhaut, the distance is 12.3 light years. In years, calculate the duration of the trip as measured by observers on Earth.(Give your answer in years)arrow_forward
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