Sustainable Energy
2nd Edition
ISBN: 9781337551663
Author: DUNLAP, Richard A.
Publisher: Cengage,
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Chapter 2, Problem 4P
To determine
Calculate the time in the past at which the human population was 2.
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Consider the conditions in Practice Problem 5.2. How short would the driver reaction times of oncoming vehicles have to be for the probability of an accident to equal 0.20?
Part 4: Problem-Solving. Solve the following problems. Show all calculations.
1. A Standard Penetration Test (SPT) was conducted at a site, and the following blow counts were
recorded:
Depth: 2 m, Blow count (N): 10
D
D
Depth: 4 m, Blow count (N): 15
Depth: 6 m, Blow count (N): 20
The energy ratio is 60%, and the overburden correction factor CN is 1.1. Calculate the
corrected N-values for each depth.
2. A soil sample was collected from a depth of 3 m using a Shelby tube. The sample had a volume
of 0.01 m³ and a mass of 18 kg. If the water content is 12%, calculate the (a) bulk density, (b) dry
density, and (c) void ratio of the soil. Assume the specific gravity of soil solids (Gs) is 2.65.
3. A Cone Penetration Test (CPT) was conducted at a site, and the following data was obtained:
Depth: 2 m, Cone resistance (qc): 5 MPa
Depth: 4 m, Cone resistance (qc): 8 MPa
Depth: 6 m, Cone resistance (qc): 12 MPa
Estimate the soil type at each depth using typical qc correlations.
Pls show step by step and formula used
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
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