31. The elasticity of materials is described by a stress-strain curve, which shows the relation between viscous liquid . 32. It is a clear, colorless, viscous liquid . 33. It is a viscous liquid composed mainly of volatile terpenes and is produced mostly by coniferous trees. 34. ESBO is an yellowish viscous liquid . 35. The substance exists as a colorless or slightly yellow viscous liquid and turns brown when exposed to air. 36. The flavour is similar to that of butterscotch, although it is a toffee and never a viscous liquid . 37. They are usually colorless viscous liquids . 38. Pull on it slowly and it exhibits continuous flow, similar to that evidenced in a highly viscous liquid . 39. It is a colourless, viscous liquid . 40. Its frictionless qualities allow improved flow of highly viscous liquids , and for uses in applications such as brake hoses.
