Integrated Science
7th Edition
ISBN: 9780077862602
Author: Tillery, Bill W.
Publisher: Mcgraw-hill,
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Chapter 7, Problem 2PEA
To determine
The time required for sunlight to reach Earth.
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(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) Suppose a star is 4.15 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth from the surface of this star. How long (in years) would it take to reach Earth?
B) The Sun is 1.50 ✕ 1011 m from Earth. How long (in minutes) does it take sunlight to reach Earth?
C) The Moon is 3.84 ✕ 108 m from Earth. How long (in s) does it take for a radio transmission to travel from Earth to the Moon and back?
(a) The distance to a star is approximately 5.50 × 10¹8 m. If this star were to burn out today, in how many years would we see it disappear?
581.35
years
(b) How long does it take sunlight to reach Earth?
8.33
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.)
X
1.28
Your response differs from the correct answer by more than 10%. Double check your calculations. S
Chapter 7 Solutions
Integrated Science
Ch. 7.1 - Prob. 1SCCh. 7.1 - Prob. 2SCCh. 7.1 - Prob. 3SCCh. 7.2 - Prob. 4SCCh. 7.2 - Prob. 5SCCh. 7.2 - Prob. 6SCCh. 7.2 - Prob. 7SCCh. 7.3 - Prob. 8SCCh. 7.3 - Prob. 9SCCh. 7.4 - Prob. 10SC
Ch. 7.4 - Prob. 11SCCh. 7.5 - Prob. 12SCCh. 7 - What determines if an electromagnetic wave emitted...Ch. 7 - Prob. 2CQCh. 7 - Prob. 3CQCh. 7 - Prob. 4CQCh. 7 - Prob. 5CQCh. 7 - Prob. 6CQCh. 7 - Prob. 7CQCh. 7 - Prob. 8CQCh. 7 - Prob. 9CQCh. 7 - Prob. 10CQCh. 7 - Prob. 11CQCh. 7 - Prob. 12CQCh. 7 - Prob. 13CQCh. 7 - Prob. 14CQCh. 7 - Prob. 15CQCh. 7 - Prob. 16CQCh. 7 - Prob. 17CQCh. 7 - Prob. 18CQCh. 7 - Prob. 1PEACh. 7 - Prob. 2PEACh. 7 - Prob. 3PEACh. 7 - Prob. 4PEACh. 7 - Prob. 5PEACh. 7 - Prob. 6PEACh. 7 - Prob. 7PEACh. 7 - Prob. 8PEACh. 7 - Prob. 9PEACh. 7 - Prob. 10PEACh. 7 - Prob. 1PEBCh. 7 - Prob. 2PEBCh. 7 - Prob. 3PEBCh. 7 - Prob. 4PEBCh. 7 - Prob. 5PEBCh. 7 - Prob. 6PEBCh. 7 - Prob. 7PEBCh. 7 - Prob. 8PEBCh. 7 - Prob. 9PEBCh. 7 - Prob. 10PEB
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- (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.) sarrow_forward(a) Suppose a star is 7.61 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth from the surface of this star. How long (in years) would it take to reach Earth? years (b) The Sun is 1.50 ✕ 1011 m from Earth. How long (in minutes) does it take sunlight to reach Earth? minutes (c) The Moon is 3.84 ✕ 108 m from Earth. How long (in s) does it take for a radio transmission to travel from Earth to the Moon and back? sarrow_forward(a) Suppose a star is 8.59 x 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth from the surface of this star. How long (in years) would it take to reach Earth? years (b) The Sun is 1.50 x 1011 m from Earth. How long (in minutes) does it take sunlight to reach Earth? minutes (c) The Moon is 3.84 x 108 m from Earth. How long (in s) does it take for a high-intensity laser beam to travel from Earth to the Moon and back?arrow_forward
- How long will it take, for the sunlight to reach the earth surface, if the sun is 1.497 x 10"m away from the earth? (Consider the speed of light in vacuum)arrow_forwardHow far does light travel in one year? [This distance is known as a light-year (ly) and is used in measuring astronomical distances.] I think the answer might have to be in scientific notationn formarrow_forwardThe average intensity of sunlight on Earth’s surface is about 1000 ? ?2 ⁄ a. Calculate the solar panel area if the amount of energy that falls on it in 10 hours is 3 × 1012J.b. What intensity would such sunlight have if concentrated by a magnifying glass onto an area 100 times smaller than its own?arrow_forward
- 1)How long does it take a radio signal from Earth to reach the Moon, which has an orbital radius of approximately 3.84×10^8 m? (Express your answer to three significant figures.)arrow_forwardThe 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?arrow_forwardThe energy of a photon is given by 6.7 × 10-15 J. What is the energy of the photon in the unit of eV?arrow_forward
- The momentum of a photon having energy 10-17J is ____________ a) 1.11 X 10-26 Kg m/s b) 2.22 X 10-26 Kg m/s c) 3.33 X 10-26 Kg m/s d) 4.44 X 10-26 Kg m/sarrow_forwardLight in a vacuum travels at a constant speed of 3x108 m/s. If the Moon's average distance from the Earth is 38234,601 km, how long would it take for a beam of light to travel from the Earth, to the Moon, and back to the Earth again?arrow_forwardA solar flare occurs in the surface of the sun on Monday morning at 11:45 AM. The sun is 1.496 x 108 kilometers away and light travels at 300 000 km per second. A. How long thereafter will the light beam reach the earth? B. What time of the day will the beam of light reach occurred at 11:45? C. If the solar flare re occurred at 1:30 pm when will the light from the flare reach earth?arrow_forward
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