21ST CENT.AST.W/WKBK+SMARTWORK >BI<
6th Edition
ISBN: 9780393415216
Author: Kay
Publisher: NORTON
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Chapter 1, Problem 8QP
To determine
The true statement.
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Speed = distance / time.
The letter "c" is used to represent the speed of light.
c = d / t
Assuming that the difference in the light travel time between the two dates was 7.6 minutes and that 1.00 AU = 150,000,000 km determine the speed of light.
a. 299,000,000 km/s
b. 299,000,000 m/s
c. 299,000 AU/minute
d. 299 AU/s
1. A rocket flies toward the earth at c, and the captain shines a
laser light beam in the forward direction. Which of the follow-
ing statements about the speed of this light are correct? (There
may be more than one correct answer.)
A. The captain measures speed c for the light.
B. An observer on earth measures speed e for the light.
C. An observer on earth measures speed c for the light.
D. The captain measures speed c for the light.
Astronomers use a light-year to measure distance. A light-year is the distance light travels in one year. The speed of light is approximately 300,000 km/sec.a. How long is 1 light-year in kilometers?b. The nearest star (other than the sun) is Alpha Centauri. It is 4.34 light-years from Earth. How far is that in kilometers?c. How long will it take a rocket traveling 42,000 km/hr to reach Alpha Centauri?
Chapter 1 Solutions
21ST CENT.AST.W/WKBK+SMARTWORK >BI<
Ch. 1.1 - Prob. 1.1CYUCh. 1.2 - Prob. 1.2CYUCh. 1.3 - Prob. 1.3CYUCh. 1 - Prob. 1QPCh. 1 - Prob. 2QPCh. 1 - Prob. 3QPCh. 1 - Prob. 4QPCh. 1 - Prob. 5QPCh. 1 - Prob. 6QPCh. 1 - Prob. 7QP
Ch. 1 - Prob. 8QPCh. 1 - Prob. 9QPCh. 1 - Prob. 10QPCh. 1 - Prob. 11QPCh. 1 - Prob. 12QPCh. 1 - Prob. 13QPCh. 1 - Prob. 14QPCh. 1 - Prob. 15QPCh. 1 - Prob. 16QPCh. 1 - Prob. 17QPCh. 1 - Prob. 18QPCh. 1 - Prob. 19QPCh. 1 - Prob. 20QPCh. 1 - Prob. 21QPCh. 1 - Prob. 22QPCh. 1 - Prob. 23QPCh. 1 - Prob. 24QPCh. 1 - Prob. 25QPCh. 1 - Prob. 26QPCh. 1 - Prob. 27QPCh. 1 - Prob. 28QPCh. 1 - Prob. 29QPCh. 1 - Prob. 30QPCh. 1 - Prob. 31QPCh. 1 - Prob. 32QPCh. 1 - Prob. 33QPCh. 1 - Prob. 34QPCh. 1 - Prob. 35QPCh. 1 - Prob. 36QPCh. 1 - Prob. 37QPCh. 1 - Prob. 38QPCh. 1 - Prob. 39QPCh. 1 - Prob. 40QPCh. 1 - Prob. 41QPCh. 1 - Prob. 42QPCh. 1 - Prob. 43QPCh. 1 - Prob. 44QPCh. 1 - Prob. 45QP
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- Since 1995, hundreds of extrasolar planets have been discovered. There is the exciting possibility that there is life on one or more of these planets. To support life similar to that on the Earth, the planet must have liquid water. For an Earth-like planet orbiting a star like the Sun, this requirement means that the planet must be within a habitable zone of 0.9 AU to 1.4 AU from the star. The semimajor axis of an extrasolar planet is inferred from its period. What range in periods corresponds to the habitable zone for an Earth-like Planet orbiting a Sun-like star?arrow_forwardWhen Sedna was discovered in 2003, it was the most distant object known to orbit the Sun. Currently, it is moving toward the inner solar system. Its period is 10,500 years. Its perihelion distance is 75 AU. a. What is its semimajor axis in astronomical units? b. What is its aphelion distance?arrow_forwardWhat, on a sphere, is analogous to a two-dimensional Cartesian coordinate system?arrow_forward
- What happens when observations include velocities close to light speed?To move an object, Newton's second law of motion applies: F = ma.b. Newton's second law of motion, F = ma, no longer applies.c. Such velocities are not calculable.d. N/Aarrow_forwardThe speed of light is 2.998*10^8 m/s. How far does light travel in 6.0 μs? Set the math up. But don't do any of it. Just leave your answer as a math expression. be sure your answer includes all the correct unit symbols.arrow_forward1. Voyager rocket is traveling between Earth and Jupiter (distance 8.013x1010 m). If Voyager probe was thousand times faster and had a speed of v=17x106 m/s=0.057c calculate the Earth-Jupiter distance that instruments aboard measure. a. What is the time of Voyager's trip measured by instruments onboard? Write your answer in seconds rounded to a whole number (for example 1234 s). _______________ b. What is the time of the trip measured by NASA on Earth? 2. An asteroid is traveling from asteroid belt to Earth with a speed of 0.6 c. To save the Earth, group of brave men set an explosive device to explode in 138 minutes. When will the group of scientists that monitor asteroid on Earth see the explosion (if everything goes rightarrow_forward
- 7. On the planet Zebulon, the standard unit for length is the clorf (cl) and the standard unit for time is the beedle (be). After many years of research, you have determined that 1clort = 0.765 meters 1beedle = 1.957 seconds (1cl = 0.765m) (1be = 1.957s) If you are driving at a speed of 85mi / h , how fast are you going in terms of clorés per beedle (cl/be)? NOTE: 1 mi = 1609 m.arrow_forwardQUESTION 2 A parsec is a unit of length equal to about 3.10X1013 km. How long will it take light, moving at 3.00X108 m/s to travel 1.00 pars (3.154X10 seconds = 1 yr) O a.I don't know, but I made the Kessel run in less than 12 parsecs b.3.27 yrs O c. 10.3 yrs O d.9.68 yrs O e.525600 minarrow_forward22. Which of the following refers to the time interval between two events as measured by a moving observer who sees the events as happening in different places? a. contracted time b. proper time c. dilated time d. shortened timearrow_forward
- 7. Your friend flies from Los Angeles to New York. She carries an accurate stopwatch with her to measure the flight time. You and your assistants on the ground also measure the flight time. a. Identify the two events associated with this measurement. b. Who, if anyone, measures the proper time? c. Who, if anyone, measures the shorter flight time?arrow_forwardThe distnace from earth to the moon is 239,000 miles. a. how many kilometers are in 239000 miles? b. given that the light travels at 3.00*10^8 m/s , how many minutes does it take for light to travel to the moon ? c. The apollo 10 mission holds the record for the highest speed by a manned vehicle at 11080 m/s . How many minutes would it take for the apollo 10 mission to reach the moon assuming the rocket travels ina straight line at that top speed? d. The apollo 11 mission took 73.45 hours to reach lunar orbit once it left earths orbit. The avergae speed duirng that time was 5500km/hr. How many miles did the apollo 11 mission actually travel in space ?arrow_forward1. An observer on earth sees objects A and B traveling toward the earth each with a speed v but from different directions. Draw the shape of each object as measured by someone traveling with that object, eg. how would objects A look according to someone on A. Eartharrow_forward
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