cylindrical soil specimen of 50 mm diameter and 100 mm long is to be prepared from a dry soil. If the specimen required 15% water of its own dry weight and the volume of air voids are 20% from its total volume, calculate the weight of the soil and water required for sample preparation, known that the specific gravity of the soil is 2.69.

If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.

Fluids at rest possess no flow energy. a)- true b)- false

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2