A B
с
D
Figure 8-1
6. Look at Figure 8--1. All of the following are parts of an ADP molecule EXCEPT
a. structure A:
b. structure B.
c. structure C.
d. structure D.

Atank with constant volume contains 2.27 kg of a mixture of water phases (liquid-vapor). in the initial state the temperature and the quality are 127 °c and 0.6, respectively. the mixture is heated until the temperature of 160 oc is reached. illustrate the process in a t-v diagram. then, determine (1) the mass of the vapor in kg at the initial state, (2) the final pressure in kpa.

Ahelical coil spring has a mean diameter of 50 mm, a wire diameter of 5.5 mm and is wound with a pitch of 10 mm. the spring steel has an ultimate strength of 1250 mpa. find the force needed to compress the spring solid and the wire stress in this condition. state whether the spring will return to its initial length.

Brief discuss how the presence of dislocations in crystal structures can be an advantage and a disadvantage to engineer and designers.