Civil and Environmental Engineering Answers

Describe any five challenges in analysing climate change using remote sensing.

Analyze the beams shown in FIG. 2C, by moment-distribution method. Use exact values of the relative k's, round off distribution factors to 3 decimal places and the rest to 2 decimal places. Stop the iteration if all the values are less than 0.20 of if the number of distributions reaches the 7th, whichever comes first

https://drive.google.com/file/d/133dcwAQASQMl95xoOwPfexpTP8EvDB15/view?usp=drivesdk

Analyze the beams shown in FIG. 2C, by moment-distribution method. Use exact values of the relative k's, round off distribution factors to 3 decimal places and the rest to 2 decimal places. Stop the iteration if all the values are less than 0.20 of if the number of distributions reaches the 7th, whichever comes first

https://drive.google.com/file/d/133dcwAQASQMl95xoOwPfexpTP8EvDB15/view?usp=drivesdk

Positron emission from 11C, 11 6C ¡ 11 5B + 0 + 1e, occurs with release of 2.87 * 1011 J per mole of 11C. What is the mass change per mole of 11C in this nuclear reaction? The masses of 11B and 11C are 11.009305 and 11.011434 amu, respectively

Directions. Solve the following problems. Show your solutions.

I. For the voltaic cell, 2 Na(s) + Fe2+(aq) → 2 Na+

(aq) + Fe(s)

a) Write the two half-reactions.

b) Write the cell notation.

c) Calculate E ° for the cell.

II. Consider the fission reaction 1

0n + 235

92U →

89

37Rb + 3 0

-1e + 3 1

0n + 144

58Ce

How much energy in kilojoules is released per gram of Uranium- 235?

III. For Al-28, calculate the binding energy in kilojoules /mol?

IV. Sketch a portion of the acrylonitrile polymer ( Refer to Table 23.1) assuming it is a

a) head-to-tail polymer

b) head-to-tail, tail-to-tail polymer

A material has a mass of 83 g before abrasion and the abrasive ratio is 1.75. If the area of

abrasion is 23, find the mass after abrasion.

A material has a mass of 187 g and 140 g before and after abrasion, respectively. If the material

has a circular cross-section of 5 cm diameter, find the abrasive ratio.

A material has a mass of 95 g and 68 g before and after abrasion, respectively. If the abrasive

ratio of 1.85, find the area of abrasion.

A solid brass bar 5.0 m long with rectangular cross-section, whose dimensions are 115 mm

by 188 mm is loaded in tension with a pull of 196.77 Mg. After which, it is loaded in

compression with a push of 168.59 Mg. If the load P used to bend the steel bar is the average

of the tensile and compressive load and there is bending and shear in the cross-section,

Calculate the following:

a. Compressive Strength

b. Maximum bending strength (Hint: assume length of the steel is the distance between

supporting ends)

A solid steel bar with rectangular cross-section whose dimensions are 100mm by 175 mm is

loaded in tension with a pull of 186.5Mg. After which, it is loaded in compression with a push of

170Mg. If the load P used to bend the steel bar is the average of the tensile and compressive

load and there is bending and shear in the cross-section, Calculate the following:

a. Tensile Strength

b. Shear Strength