A 2 lb weight stretches a spring 6 inches in equilibrium. An external force F(t) = sin 8t lb is ap- plied to the weight, which is released from rest 2 inches below equilibrium. Find its displacement for t > 0.

Select all true statements. ANFO explosive is often preferred because using bulk explosives is cheaper, less labor intensive during loading and they fill the entire blast hole diameter. Emulsion explosives should not be used in strong and massive rocks where a high detonation pressure and high detonation velocity is required to break the rock. During rock fragmentation by blasting, the reflection of the compression wave at the free face into tension and shear waves contributes to additional cracking between the free face and the blast hole. When metals or other reactive elements are present in the composition of an explosive, less oxygen is required for a an oxygen-balanced reaction.

Determine the force in members DE, HG, Bc and BG of the turss Shown in and state if the members are intenstion or compreession

Question 12 Based on the diagram below, calculate the stress at each hole, assuming that the holes are sufficiently far apart that their effects do not interact. Thickness 0.50 in 1.40 in .0.72-in L0.40-in 0.50-in dia. 6200 lb dia. dia. Axial tensile force