Applied Physics (11th Edition)
11th Edition
ISBN: 9780134159386
Author: Dale Ewen, Neill Schurter, Erik Gundersen
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 20, Problem 2AC
(a) When the Apollo astronauts landed on the moon, it took the radio signal 1.28 s to reach Mission Control on the earth. How far away were the astronauts from the earth? (b) Since the sun is 1.50×1011 m from the earth, how much time does it take for light to travel from the sun to the earth? (c) Light from our next-closest star, Alpha Centauri, takes 4.31 years to reach the earth. How far away from the earth is Alpha Centauri?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
(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 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
Can you please help me with this question? Thank you!
Chapter 20 Solutions
Applied Physics (11th Edition)
Ch. 20.2 - Find the distance (in metres) traveled by a radio...Ch. 20.2 - Prob. 2PCh. 20.2 - A television signal is sent to a communications...Ch. 20.2 - How long does it take for a radio signal from the...Ch. 20.2 - The sun is 9.30107mi from the earth. How long does...Ch. 20.2 - A radar wave is bounced off an airplane and...Ch. 20.2 - How long does it take for a radio wave to travel...Ch. 20.2 - How long does it take for a flash of light to...Ch. 20.2 - How long does it take for a police radar beam to...Ch. 20.2 - How far away (in km) is an airplane if the radar...
Ch. 20.2 - An auto mechanic uses a strobe light to time a...Ch. 20.2 - A construction company uses GPS technology to...Ch. 20.2 - (a) How long does it take for light to reach the...Ch. 20.2 - Prob. 14PCh. 20.2 - How long does it take light to reach the earth...Ch. 20.2 - Preparing for reentry, astronauts use radar to...Ch. 20.2 - Prob. 17PCh. 20.2 - Light from the sun travels 1.50108 km to reach the...Ch. 20.3 - c=3.00108m/s =4.55105m f=?Ch. 20.3 - c=3.00108m/s =9.701010m f=?Ch. 20.3 - c=3.00108m/s f=9.701011Hz =?Ch. 20.3 - c=3.00108m/s f=24.2 MHz =?Ch. 20.3 - c=3.00108m/s f=45.6 MHz =?Ch. 20.3 - Prob. 6PCh. 20.3 - Prob. 7PCh. 20.3 - Prob. 8PCh. 20.3 - Find the wavelength of a radio wave from an AM...Ch. 20.3 - Find the wavelength of a radio wave from an FM...Ch. 20.3 - Find the frequency of an electromagnetic wave if...Ch. 20.3 - Find the frequency of an electromagnetic wave if...Ch. 20.3 - Prob. 13PCh. 20.3 - Prob. 14PCh. 20.3 - Prob. 15PCh. 20.3 - An AM radio station broadcasts a signal with a...Ch. 20.4 - Prob. 1PCh. 20.4 - Prob. 2PCh. 20.4 - Prob. 3PCh. 20.4 - Find the frequency of electromagnetic radiation...Ch. 20.4 - Find the frequency of electromagnetic radiation...Ch. 20.4 - Prob. 6PCh. 20.4 - Find the frequency of electromagnetic radiation...Ch. 20.4 - Prob. 8PCh. 20.4 - Prob. 9PCh. 20.4 - Prob. 10PCh. 20.4 - Prob. 11PCh. 20.4 - Prob. 12PCh. 20.4 - An AM radio station in a nearby town broadcasts a...Ch. 20.5 - I=48.0 cd I=___mCh. 20.5 - Prob. 2PCh. 20.5 - I=765 m I=___ cdCh. 20.5 - I=432 m I=___ cdCh. 20.5 - I=75.0 cd I=___ mCh. 20.5 - I=650 m I=___ cdCh. 20.5 - I=900 m r=7.00 ft E=?Ch. 20.5 - I=741 m r=6.50 m E=?Ch. 20.5 - I=893 m r=3.25 ft E=?Ch. 20.5 - E=4.32 lux r=9.00 m I=?Ch. 20.5 - E=10.5 ft-candles r=6.00 ft I=?Ch. 20.5 - Prob. 12PCh. 20.5 - Prob. 13PCh. 20.5 - Prob. 14PCh. 20.5 - If an observer triples her distance from a light...Ch. 20.5 - If the illuminated surface is slanted at an angle...Ch. 20.5 - Find the illumination on a surface by three light...Ch. 20.5 - Find the intensity of two identical light sources...Ch. 20.5 - Find the intensity of two identical light sources...Ch. 20.5 - A desk is 3.35 m below an 1850-m incandescent...Ch. 20 - Which of the following are examples of...Ch. 20 - Prob. 2RQCh. 20 - Prob. 3RQCh. 20 - Light behaves a. as a massive particle. b. always...Ch. 20 - Does the wavelength of light depend on its...Ch. 20 - Prob. 6RQCh. 20 - How does the intensity of illumination depend on...Ch. 20 - In your own words, explain how the speed of light...Ch. 20 - Does light always travel at the same speed?...Ch. 20 - What name is given to the entire range of waves...Ch. 20 - Prob. 11RQCh. 20 - Who developed the wave packet theory of light?Ch. 20 - Who made the first estimate of the speed of light?Ch. 20 - How was the first estimate of the speed of light...Ch. 20 - What are the units of luminous intensity?Ch. 20 - In your own words, explain luminous intensity.Ch. 20 - Find the distance (in metres) traveled by a radio...Ch. 20 - A radar wave that is bounced off an airplane...Ch. 20 - How long does it take for a police radar beam to...Ch. 20 - Prob. 4RPCh. 20 - How long does it take for a radio signal to travel...Ch. 20 - Find the wavelength of a radio wave from an AM...Ch. 20 - Find the frequency of a radio wave if its...Ch. 20 - Prob. 8RPCh. 20 - Prob. 9RPCh. 20 - Prob. 10RPCh. 20 - Prob. 11RPCh. 20 - Prob. 12RPCh. 20 - Prob. 13RPCh. 20 - Find the intensity of the light source necessary...Ch. 20 - Prob. 15RPCh. 20 - Find the intensity of two identical light sources...Ch. 20 - Find the illumination on a surface by three light...Ch. 20 - Prob. 1ACCh. 20 - (a) When the Apollo astronauts landed on the moon,...Ch. 20 - Prob. 3ACCh. 20 - The individual rods on rooftop antennas are...Ch. 20 - Prob. 5AC
Additional Science Textbook Solutions
Find more solutions based on key concepts
Two students are discussing their answers to Questions 14 and 15.
Student 1: I think Extrasolar Planet System C...
Lecture- Tutorials for Introductory Astronomy
41. If the Sun were the size of a beach ball, Earth would be the size of a green pea 110 m away. Show that the ...
Conceptual Physical Science (6th Edition)
Which cart takes longer to travel between the two marks? Explain your reasoning.
Tutorials in Introductory Physics
A friend says, “It makes no sense that Anna could turn on lights in her hands simultaneously in her frame but t...
Modern Physics
The resistance of the wire.
College Physics: A Strategic Approach (3rd Edition)
If acceleration is proportional to the net force or is equal to net force.
Conceptual Physics (12th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- (a) How long in seconds does it take a radio signal to travel 180 km from a transmitter to a receiving antenna? (b) We see a full Moon by reflected sunlight. How much earlier did the light that enters our eye leave the Sun? The Earth - Moon and Earth - Sun distances are 3.8x105 km and 1.5 x 108 km, respectively. (c) What is the round-trip travel time in seconds for light between Earth and a spaceship at a 9.0 x 106 km distance from Earth? (d) Suppose astronomers observe a supernova about 7600 light-years (ly) distant. How long ago in years did the explosion actually occur? (a) Number Units (b) Number Units (c) Number Units (d) Number Unitsarrow_forward(a) How long in seconds does it take a radio signal to travel 180 km from a transmitter to a receiving antenna? (b) We see a full Moon by reflected sunlight. How much earlier did the light that enters our eye leave the Sun? The Earth – Moon and Earth – Sun distances are 3.8x105 km and 1.5 × 108 km, respectively. (c) What is the round-trip travel time in seconds for light between Earth and a spaceship at a 6.8 × 107 km distance from Earth? (d) Suppose astronomers observe a supernova about 7300 light-years (ly) distant. How long ago in years did the explosion actually occur?arrow_forwardA) 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?arrow_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(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_forwardWhat is the wavelength (in m) of a radio signal with a frequency of 98.3 MHz? Enter the numerical part of your answer to three decimal figures. The speed of light in a vacuum (and in normal air) = Vlight = c = 3.00 × 108 m/s. Your Answer:arrow_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? yearsarrow_forward(a) How long does it take a radio signal to travel 150 km from a transmitter to a receiving antenna? (b) We see a full Moon by reflected sunlight. How much earlier did the light that enters our eye leave the Sun? The Earth–Moon and Earth–Sun distances are 3.8 *10^5 km and 1.5* 10^8 km, respectively. (c) What is the round-trip travel time for light between Earth and a spaceship orbiting Saturn, 1.3*10^9 km distant? (d) The Crab nebula, which is about 6500 light-years (ly) distant, is thought to be the result of a supernova explosion recorded by Chinese astronomers in A.D. 1054. In approximately what year did the explosion actually occur? (When we look into the night sky, we are effectively looking back in time.)arrow_forwardConsider a pulse of laser light aimed at the moon that bounces back to Earth. The distance between Earth and the moon is 3.8x108m. What is the round trip time for the light travel? (ans. 0.395s) The nearest Star beyond the sun is Alpha Centauri, which is 4.2x1016m away. If we were to recieve a radio message from this star today, how long ago(in years) was it sent? (ans. 4.44 years) Show workarrow_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_forwardA spacecraft is flying away from the Earth at 5.47x106m/s. The astronauts on the spacecraft send a message back to mission control on Earth using their radio transmitter than has a frequency of 1.54x109Hz. What frequency will mission control need to look for in order to receive the spacecraft's signal? (Give your answer in x109Hz)arrow_forward1) What is the wavelength for an FM radio signal that has a frequency of 107.8 MHz? (speed of light, is 3.00*10^ 1 m/s )arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- An Introduction to Physical SciencePhysicsISBN:9781305079137Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar TorresPublisher:Cengage Learning
An Introduction to Physical Science
Physics
ISBN:9781305079137
Author:James Shipman, Jerry D. Wilson, Charles A. Higgins, Omar Torres
Publisher:Cengage Learning
What Are Electromagnetic Wave Properties? | Physics in Motion; Author: GPB Education;https://www.youtube.com/watch?v=ftyxZBxBexI;License: Standard YouTube License, CC-BY