1. Consider a mixture of one mole of Nitroglycerin and one mole of Ammonium Nitrate

a. Write the detonation equation for this mixture

b. Using class notes, posted articles in Courseworks site and other resources calculate the energy released (kJ/kg) by this reaction. Show your steps and assumptions in this calculation.

2. Five soil samples (A,B, C, D, E ) have been analyzed for their grain size distribution shown as straight lines on the cumulative probability plot below

Identify each one of these using the attached PRA classification chart. In each case explain your method and show how you reached these answers.

3. Investigate by the slip circle technique the stability of the bank shown below. Assume that a slope failure most likely to occur. The condition selected is considered to be the worst case. Analyze, and determine the factor of safety for:

a) Dry soil

b) Saturated soil

c) What would be the maximum weight of a building on top is permissible under dry soil conditions for a factor of safety of 1.5?

Use the following inputs:

Soil specific weight                                 220 lb/ft3

Soil cohesion                                        250 lb/ft2

Soil internal friction angle                       30 ^o

Pit slope                                               40 ^o

Bank height                                          60 ft

Radius of slip circle                               80 ft

Building weight ? tons (no building is considered initially)