College Physics, Volume 1
2nd Edition
ISBN: 9781133710271
Author: Giordano
Publisher: Cengage
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Chapter 1, Problem 28P
To determine
Convert second into minutes.
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The speed of light in space is 3.00 x 108 m/s. The time for light from the Sun to reach Earth is 8 minutes 20 seconds. Therefore, the distance from the Sun to Earth is
2.40 x 109 m.
8.64 x 1012 m.
1.50 x 1011 m.
2.25 x 109 m.
The speed of light is c = 3.0 x 10^8 m/s. If the distance between the Earth and the moon is d = 2.39 x 10^5 mi (1.0 mi = 1.61 km). You send a laser from the Earth to the moon and back. How long does this take?
The speed of light is exactly e = 299792458 m - s1. (Also written 299, 792, 458 m - s-1 or 2.99792458 × 10°m -
s1. This is exact because it is the definition of the metre.)
It takes light 8.3 minutes to get from the sun to the earth. Assuming that the earth's orbit is exactly circular (an
approximation) and that its speed is constant, and using the data in this question, calculate the speed of the earth
in its orbit around the sun in km · hr. Practise writing your conversions clearly using the 'multiply by 1' technique.
Speed of the earth =_ km per hour. Write your answer in standard (not scientific) notation, i.e. without using
exponents, and without using commas. However, remember to use the correct number of significant figures. (Hint:
which is the least precise of the given data?) Do not include units.
Chapter 1 Solutions
College Physics, Volume 1
Ch. 1.3 - Give the number of significant figures for all the...Ch. 1.4 - Prob. 1.2CCCh. 1.5 - The area of a surface can be measured in units of...Ch. 1 - Suppose a friend told you that the density of a...Ch. 1 - Prob. 2QCh. 1 - Prob. 3QCh. 1 - Prob. 4QCh. 1 - Prob. 5QCh. 1 - Prob. 6QCh. 1 - Prob. 7Q
Ch. 1 - Prob. 8QCh. 1 - Prob. 9QCh. 1 - Prob. 1PCh. 1 - You take a long walk on a sandy beach. When you...Ch. 1 - Prob. 3PCh. 1 - Prob. 4PCh. 1 - Prob. 5PCh. 1 - Prob. 6PCh. 1 - Prob. 7PCh. 1 - Prob. 8PCh. 1 - Prob. 9PCh. 1 - Prob. 10PCh. 1 - Prob. 11PCh. 1 - Prob. 12PCh. 1 - Prob. 13PCh. 1 - Prob. 14PCh. 1 - Prob. 15PCh. 1 - Prob. 16PCh. 1 - Prob. 17PCh. 1 - Prob. 18PCh. 1 - Prob. 19PCh. 1 - Prob. 20PCh. 1 - Prob. 21PCh. 1 - Prob. 22PCh. 1 - Prob. 23PCh. 1 - Prob. 24PCh. 1 - Prob. 25PCh. 1 - Prob. 26PCh. 1 - Prob. 27PCh. 1 - Prob. 28PCh. 1 - Prob. 29PCh. 1 - Consider the equation mgh=12mv2 where m has units...Ch. 1 - Prob. 31PCh. 1 - Prob. 32PCh. 1 - Prob. 33PCh. 1 - Prob. 34PCh. 1 - Prob. 35PCh. 1 - Prob. 38PCh. 1 - Prob. 39PCh. 1 - Prob. 40PCh. 1 - Prob. 41PCh. 1 - Prob. 42PCh. 1 - Prob. 43PCh. 1 - Prob. 44PCh. 1 - Steep grade. A mountain road makes an angle = 8.5...Ch. 1 - Prob. 46PCh. 1 - Prob. 47PCh. 1 - Prob. 48PCh. 1 - Prob. 49PCh. 1 - Prob. 50PCh. 1 - Prob. 52PCh. 1 - Prob. 53PCh. 1 - Prob. 54PCh. 1 - Prob. 55PCh. 1 - Prob. 56PCh. 1 - Prob. 57PCh. 1 - Prob. 58PCh. 1 - Prob. 59PCh. 1 - Prob. 60PCh. 1 - Prob. 61PCh. 1 - Prob. 62PCh. 1 - The unit of area called the acre comes from an old...Ch. 1 - Prob. 64PCh. 1 - Prob. 65PCh. 1 - Prob. 66PCh. 1 - Prob. 67PCh. 1 - Prob. 68PCh. 1 - Prob. 69PCh. 1 - Prob. 70PCh. 1 - Prob. 71PCh. 1 - Prob. 72PCh. 1 - Prob. 73PCh. 1 - Prob. 74PCh. 1 - Prob. 75P
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- The 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_forwardThe distance between Saturn and the sun is approximately 8.9 × 108 mi. The speed of light is approximately 1.9 × 105 miles per second. How long does it take light to travel from the sun to Saturn? Answer in units of sec.arrow_forwardOne way to express the speed of light is to say that light travels at about 1 foot per nanosecond. Suppose you are using a laser rangefinder to measure the length of a 100-yard football field. How long does it take the laser light to leave your range finder, bounce off an object at the opposite end of the field, and return to the range finder? 150 nanoseconds 300 nanoseconds 600 nanoseconds 1200 nanosecondsarrow_forward
- The meter is the standard unit of length for physics. Which of these is the current way we define that standard? Based on a metal bar serving as a length "standard " that is kept by the National Institute of Standards and Technology (NIST) in the U.S. Based on the average distance from the Earth to the Sun. Based on the diameter of the Earth. Precisely how far light travels in 1/299792458 second.arrow_forward17. The distance from earth to the nearest star is about 4 x 1016 meters. How long would it take a radio signal traveling at the speed of light, 3.0 x 108 m/s, to make a one-way trip to this star? 300 years 1 x 108 years 4 x 104 years 4 years 2 x 103 yearsarrow_forwardHow long does it take light to travel from the Earth to the Moon? The speed of light is 2.998×105 km/s and the Moon is 3.844×105 km away from Earth, on average.arrow_forward
- How long does it take light to travel three times around the circumference of Earth? The radius of Earth is 6371.0 km and the speed of light is 2.998×105 km s−1.arrow_forwardThe distance to a star is approximately 4.43 ✕ 1018 m. If this star were to burn out today, in how many years would we see it disappear? (b) How long does it take sunlight to reach Earth? in minutes(c) How long does it take for a microwave radar signal to travel from Earth to the Moon and back? (The distance from Earth to the Moon is 3.84 ✕ 105 km.)in secondsarrow_forwardThe distance from earth to the nearest star is about 4 x 1016 meters. How long would it take a radio signal traveling at the speed of light, 3.0 x 108 m/s, to make a one-way trip to this star?arrow_forward
- 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?arrow_forwardAll of the stars of the Big Dipper (part of the constellation Ursa Major) may appear to be the same distance from the earth, but in fact they are very far from each other. Figure shows the distances from the earth to each of these stars. The distances are given in light-years (ly), the distance that light travels in one year. One light-year equals 9.461 * 1015 m. (a) Alkaid and Merak are 25.6 apart in the earth’s sky. In a diagram, show the relative positions of Alkaid, Merak, and our sun. Find the distance in light-years from Alkaid to Merak. (b) To an inhabitant of a planet orbiting Merak, how many degrees apart in the sky would Alkaid and our sun be?arrow_forwardA light-vear is the distance that light travels in one year. The speed of light is 3.00 x 108 m/s. How many miles are there in one light-year? (1 mi = 1609 m, 1 y =365 d) 5.88 x 1015 mi O 9.46 x 1012 mi 5.88 x 1012 mi O 9,46 x 1015 miarrow_forward
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