Civil and Environmental Engineering Answers

Discuss 5 different desirable characteristics of aggregate of aggregate used in Portland cement concrete.

What are the three mineralogical or geological classifications of rocks, and how are they formed?

A continuous cable (diameter 6 mm) with tension force T is attached to a horizontal frame member at B and C to support a sign structure, Fig. 1. The cable passes over a small pulley at D. The wire is made of a copper alloy, and the stress-strain relationship for the wire is (a) Find the axial normal strain in the cable and its elongation due to the load W = 6.8 kN (b) If the forces are removed, what is the permanent set of the cable. Hint: Start with constructing the stress-strain diagram and determine the modulus of elasticity, E and the 0.2% offset yield stress

The open tank contains two different liquids as shown below. Determine the total pressure at elevation zero.

Two clean parallel glass plates, separated by a distance d = 1.5 mm, are dipped in a bath of water. How far does the water rise due to capillary action, if σ = 0.0730 N/m?

Benzene at 20°C has a viscosity of 0.000651 Pa-s. What shear. stress is required to deform this fluid at a strain rate of 4900 s-1?

Calculate the density, specific weight, and volume of chloride gas at 25 °C and pressure of 600 000 N/m2 absolute.

In a piston-and-cylinder apparatus the initial volume of air is < 90 – 120 > L at a pressure of < 100 – 130 > kPa and temperature of 26 °C. If the pressure is doubled while the volume is decreased to < 50 – 60 > L, compute the final temperature and density of the air.

 If < 2.2 – 4.3 > m3 of substance weighs <20 - 40 > kN, calculate the following.

a.) Specific weight

b.) Density

c.) Specific gravity

David who seeks to a certain amount of money today such that after 4 years he can withdraw $3,000. The applicable discount rate is 5% to be compounded half early. Calculate the amount that David is required to deposit today.