You test the lighting for the first time none of the new lights work, but the old ones do. What should you do first?

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

What is the major difference between thermoplastics and thermosetting plastics from the polymerization structure point of view?

Starting wih an energy balance on a rectangular volume element, derive the one- dimensional transient heat conduction equation for a plane wall with constant thermal conductivity and no heat generation.