FUNDAMENTALS OF PHYSICS - EXTENDED
12th Edition
ISBN: 9781119773511
Author: Halliday
Publisher: WILEY
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Question
Chapter 1, Problem 56P
(a)
To determine
To find: how long did the Tyrannosaurus rex dinosaurs live in Galactic years.
(b)
To determine
To find: how long did the first major ice berg occur.
(c)
To determine
To find: how long did the Earth form.
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The Drake Equation is a tool for estimating ...
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the number of alien civilizations that have visited the Earth in the past
B)
the number of planets in the Milky Way that contain civilizations intelligent enough to communicate through space.
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the number of habitable planets in the Milky Way where life has developed
Tutorial
A radio broadcast left Earth in 1923. How far in light
years has it traveled?
If there is, on average, 1 star system per 400 cubic light
years, how many star systems has this broadcast
reached?
Assume that the fraction of these star systems that
have planets is 0.50 and that, in a given planetary
system, the average number of planets that have
orbited in the habitable zone for 4 billion years is 0.40.
How many possible planets with life could have heard
this signal?
Part 1 of 3
To figure out how many light years a signal has
traveled we need to know how long since the signal left
Earth. If the signal left in 1923, distance in light years =
time since broadcast left Earth.
d = tnow - broadcast
d = 97
97 light years
Part 2 of 3
Since the radio signal travels in all directions, it
expanded as a sphere with a radius equal to the
distance it has traveled so far. To determine the
number of star systems this signal has reached, we
need to determine the volume of that sphere.
V, =
Vb…
Tutorial
A radio broadcast left Earth in 1925. How far in light years has it traveled?
If there is, on average, 1 star system per 400 cubic light years, how many star systems has this broadcast
reached?
Assume that the fraction of these star systems that have planets is 0.30 and that, in a given planetary
system, the average number of planets that have orbited in the habitable zone for 4 billion years is 0.85. How
many possible planets with life could have heard this signal?
Part 1 of 3
To figure out how many light years a signal has traveled we need to know how long since the signal left Earth.
If the signal left in 1925, distance in light years = time since broadcast left Earth.
d = tnow - tbroadcast
d =
light years
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Chapter 1 Solutions
FUNDAMENTALS OF PHYSICS - EXTENDED
Ch. 1 - Prob. 1PCh. 1 - A gry is an old English measure for length,...Ch. 1 - The micrometer 1 m is often called the micron. a...Ch. 1 - Spacing in this book was generally done in units...Ch. 1 - SM WWW Horses are to race over a certain English...Ch. 1 - ILW Hydraulic engineers in the United States often...Ch. 1 - Until 1883, every city and town in the United...Ch. 1 - wor about 10 years after the French Revolution,...Ch. 1 - The fastest growing plant on record is a...Ch. 1 - A lecture period 50 mm is close to 1 microcentury....
Ch. 1 - A fortnight is a charming English measure of time...Ch. 1 - Prob. 16PCh. 1 - SSM Five clocks are being tested in a laboratory....Ch. 1 - Because Earths rotation is gradually slowing, the...Ch. 1 - Suppose that, while lying on a beach near the...Ch. 1 - GO The record for the largest glass bottle was set...Ch. 1 - Earth has mass of 5.98 1024 kg. The average mass...Ch. 1 - Gold, which has a density of 19.32 g/cm3, is the...Ch. 1 - Prob. 23PCh. 1 - GO Grains of fine California beach sand are...Ch. 1 - During heavy rain, a section of a mountainside...Ch. 1 - Prob. 26PCh. 1 - Prob. 27PCh. 1 - Prob. 28PCh. 1 - On a spending spree in Malaysia, you buy an ox...Ch. 1 - Prob. 30PCh. 1 - Prob. 31PCh. 1 - Prob. 32PCh. 1 - SSM A ton is a measure of volume frequently used...Ch. 1 - Two types of barrel units were in use in the 1920s...Ch. 1 - An old English childrens rhyme states, Little Miss...Ch. 1 - Prob. 36PCh. 1 - A typical sugar cube has an edge length of 1 cm....Ch. 1 - An old manuscript reveals that a landowner in the...Ch. 1 - SSM A tourist purchases a car in England and ships...Ch. 1 - Prob. 40PCh. 1 - SSM A cord is a volume of cut wood equal to a...Ch. 1 - One molecule of water H2O contains two atoms of...Ch. 1 - A person on a diet might lose 2.3 kg per week....Ch. 1 - What mass of water fell on the town in Problem 7?...Ch. 1 - a A unit of time sometimes used in microscopic...Ch. 1 - A unit of area often used in measuring land areas...Ch. 1 - SSM An astronomical unit AU is the average...Ch. 1 - Prob. 48PCh. 1 - A traditional unit of length in Japan is the ken 1...Ch. 1 - You receive orders to sail due east for 24.5 mi to...Ch. 1 - Prob. 51PCh. 1 - Prob. 52PCh. 1 - Prob. 53PCh. 1 - Measures of a man. Leonardo da Vinci, renowned for...Ch. 1 - Dog years. Dog owners like to convert the age of a...Ch. 1 - Prob. 56PCh. 1 - Prob. 57PCh. 1 - Prob. 58PCh. 1 - Prob. 59PCh. 1 - Prob. 60PCh. 1 - Class time, the long of it. For a common four-year...
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