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).
Also, you don't have to introduce foods to your child in any special order. If you want to give your baby a taste of tofu at age 6 months, go ahead, even though it's not listed on our chart until age 8 months. And while cereal is a traditional first food in the United States, it's fine to start with mashed fruits or vegetables instead.