Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 31, Problem 23P
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a) Approximately how long would it take a telephone signal to travel 2760 mi from coast to coast across the United States? (Telephone signals travel at about the speed of light.) s(b) Approximately how long would it take a radio signal to reach the International Space Station (ISS) at an orbital altitude of 350 km? s
(a) The distance to a star is approximately 4.97 × 10¹8 m. If this star were to burn out today, in how many years would we see it disappear?
years
(b) How long does it take sunlight to reach Earth?
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 x 105 km.)
S
(a) The distance to a star is approximately 4.94 ✕ 1018 m. If this star were to burn out today, in how many years would we see it disappear? years(b) How long does it take sunlight to reach Earth? 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.) s
Chapter 31 Solutions
Physics for Scientists and Engineers
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- (a) Neil A. Armstrong was the first person to walk on the moon. The distance between the earth and the moon is 3.85 x 108 m. Find the time it took for his voice to reach the earth via radio waves. (b) Someday a person will walk on Mars, which is 5.60 × 1010 m from the earth at the point of closest approach. Determine the minimum time that will be required for a message from Mars to reach the earth via radio waves. (a) Number i (b) Numberi Units Unitsarrow_forwardA distant galaxy emits light that has a wavelength of 655.7 nm. On earth, the wavelength of this light is measured to be 660.7 nm. (a)Decide whether this galaxy is approaching or receding from the earth. (b) Find the speed of the galaxy relative to the earth. (Give youranswer to 4 significant digits. Use 2.998 × 108 m/s as the speed of light.)arrow_forwardThe distance between the Earth and the Moon is 3.85 x108 m. During the Apollo 15 mission, astronaut David Scott was often communicating lunar findings from the Moon to the Earth. How much time did it take for his voice to reach the Houston via radio waves? 0.99 s 1.57 s 2.11 s 1.28 s 1.76 s HUNUE,arrow_forward
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