The viscosity of a non-Newtonian fluid. can generally be affected by the application of. what is called a shear stress. Examples of. shear stresses are squeezing, stirring, agitat-. ing, or applying mechanical pressure to the. surface of a fluid.
A newborn senses all of these tastes except one: Experiments suggest that babies canât taste salt until they are about 4 months old (Beauchamp et al 1986). But newborns love sugar solutions--the sweeter, the better. In fact, when babies are given a sugar solution immediately before a painful procedure--like a heel prick--they cry less. Newborns also seem to like the taste of glutamate, which is found in breast milk (Beauchamp and Pearson 1991).
1 Most babies say a few simple words such as 'mama' and 'dada' by the end of 12 months - and now know what they're saying. They respond to - or at least understand, if not obey - your short, one-step requests such as, 'Please put that down.'.  Baby talk at 18 months. By this age, babies may use up to 20 simple words, like daddy, dog or cup. They should also be able to point to people, objects and body parts you name for them. They repeat words or sounds they hear you say such as the last word in a sentence.