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).
Anything your baby is able to pick up will likely end up in her mouth -- tasting is one of the ways she explores her world. Itâs crucial that you donât leave small items lying around that baby could choke on. Anything that can fit inside a toilet paper tube is too small to be within fingerâs reach of your 4-month-old.