Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 2, Problem 3P
The population of a particular country has a doubling time of 45 years. When will the population be three times its present value?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The population of a certain community follows the law of exponential change. If the present population of the community is 144,000 and ten (10) years ago was 100,000 when will the population double? In ten (10) years what will be the population of the community?
4. The population of a certain community follows the law of exponential change. If the
present population of the community is 154 000 and 12 years ago was 120 000 when will
be the population tripple? In seven years, what is the population of the community?
The population of a state is known to grow at a rate proportional to the number of people
presently living in the state. If after one decade the population has trebled and if after two
decades the population is 150,000, find the number of people initially living in the state.
Chapter 2 Solutions
Sustainable Energy
Ch. 2 - A quantity has a doubling time of 110 years....Ch. 2 - The population of a particular country has a...Ch. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - The total world population in 2012 was about 7...Ch. 2 - The population of a state is 25,600 in the year...Ch. 2 - The population of a country as a function of time...Ch. 2 - Prob. 9PCh. 2 - Prob. 10PCh. 2 - Prob. 11P
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
A 3 ft square footing carries a sustained load of 10 k. It is placed on the surface of a 30 ft thick saturated ...
Foundation Design: Principles and Practices (3rd Edition)
1.2 Explain the difference between geodetic and plane
surveys,
Elementary Surveying (14th Edition)
11-1. Determine the moments at A,B, and C, then draw
the moment diagram for the beam. The moment of ine...
Structural Analysis (10th Edition)
State three examples of a static load application and three examples of a dynamic load application.
Materials for Civil and Construction Engineers (4th Edition)
5.11 What error results on a 200-ft sight with a level if the rod reading is 6.307 ft but the top of the
7-ft r...
Elementary Surveying: An Introduction To Geomatics (15th Edition)
What production method for steel shapes is specified by the following organizations? AISI (American Iron and St...
Structural Steel Design (6th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- The total world population in 2012 was about 7 billion, and Figure 2.11 shows that at that time the actual world population growth rate was about 1% per year. The figure also shows an anticipated roughly linear decrease in growth rate that extrapolates to zero growth in about the year 2080. Assuming an average growth rate of 0.5% between 2012 and 2080, what would the world population be in 2080? How does this compare with estimates discussed in the text for limits to human population?arrow_forward1. The population of the Philippines has doubled in the last 50 years. The population of the Philippines in 1948 was 35 million. On what year will our population triple?arrow_forwardThe population of a country doubles in 50 years. How many years will it be five times as much? Assume that the rate of increase is proportional to the number of inhabitants. Answer: years (whole number)arrow_forward
- Solve the application problem. Show complete details of your solution. The population of a certain community is known to increase at a rate proportional tothe number of people presently living in the community. If after 5 years the populationhas doubled and after three years the population is 10,000. What was the initialpopulation? What will be the population in 10 years?arrow_forwardTHE POPULATION OF THE PHILIPPINES DOUBTED IN THE LAST 30 YEARS FROM 1967 TO 1997. ASSUMING RATE OF POPULATION INCREASE WILL REMAIN THE SAME, IN WHAT YEAR WILL THE POPULATION TRIPLE?arrow_forwardSolve the following application problems. The population of a certain community is known to increase at a rate proportional to the number of people presently living in the community. If after 5 years the population has doubled and after three vears the population is 10.000. What was the initia population? What will be the population in 10 years?arrow_forward
- The population of the Philippines has doubled in thelast 50 years. The population of the Philippines in 1948was 35 million. On what year will our population triple?arrow_forwardPopulation of a town today is 10000. The population has decreased steadily at the rate of 1% per year for last 10 years. Determine the population at the end of each year in the last decade.arrow_forward1- The recent population of a city is 30000 inhabitant. What is the predicted population after 30 years if the population increases 4000 in 5 years. 2- The recent population of a city is 30000 inhabitant. What is the predicted population after 30 years if the growth rate is 3.5%. 3- The population of a town as per the senses records are given below, estimate the population of the town as on 2040 by all methods.arrow_forward
- Water is available at a rate of 2000 L/min to a small apartment complex, consisting of four units. If at a given time units 1, 2, and 3 are consuming 9 kg/s, 7 kg/s, and 8 kg/s, respectively, how much water is available to unit 4? Express your answer in m s/ 3 and kg/s. There is an answer already posted to this question, but the explaination is confusing how they put the numbers.arrow_forwardThe population of a city in the year 2000 was 82,300. If average percent increase in population of the city in the year 2020 estimated geometrical increase will nearly be Given -35% per decade.arrow_forwardI need the solution in handwriting Q1/ The average price of gasoline in 2005 was $2.31 per gallon. In 1993, the average. price was $1.07. What was the annual rate of increase in price of gasoline over this 12- year period? How long will it be before we are paying $5.00 per gallon?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Engineering Fundamentals: An Introduction to Engi...Civil EngineeringISBN:9781305084766Author:Saeed MoaveniPublisher:Cengage Learning
Engineering Fundamentals: An Introduction to Engi...
Civil Engineering
ISBN:9781305084766
Author:Saeed Moaveni
Publisher:Cengage Learning
What Is A Construction Takeoff? | Are They Still Necessary In Quantity Surveying?; Author: Metroun Quantity Surveying;https://www.youtube.com/watch?v=uTWoDPtcOjg;License: Standard Youtube License