Critical exponents also exist for transport quantities like viscosity and heat conductivity. Viscoelastic solids may exhibit both shear viscosity and bulk viscosity. Newtonian fluids are the simplest mathematical models of fluids that account for viscosity. An inviscid fluid has no viscosity, formula 5. One of the most common instruments for measuring kinematic viscosity is the glass capillary viscometer. These humectant food additives are used for the purpose of controlling viscosity and texture. They can be thinned with a cyanoacrylate of the same chemical composition with lower viscosity. The fluids without a constant viscosity (non-Newtonian fluids) cannot be described by a single number. Starch also affects the viscosity of predough. Droplet formation mostly depends on momentum, viscosity and surface tension. There are no simple but correct expressions for the viscosity of a fluid. Relationships between hematocrit, viscosity, and shear rate are important factors to put into consideration. Lava flow speeds vary based primarily on viscosity and slope. These weapons contain mustard gas mixed with a thickener, which gives it a tar-like viscosity. The recommended dynamic viscosity decreases with rotating frequency.