21. In most cases, the critical shear stress is calculated, although the normal stress can be used as well. 22. This fused cusp is exposed to higher than normal stress and will stretch over time as a consequence. 23. Here is an example in normal stress meter ( the first line of Longfellow's " Evangeline " ): 24. The normal stress on a bone is shielded from that bone by being placed on a prosthetic implant. 25. As if the normal stresses of adolescence were not enough, 13-year-old Brad Naylor must bear an added burden. 26. Normally, effective normal stress is calculated by subtracting the pore water pressure from the normal stress, in natural conditions. 27. Normally, effective normal stress is calculated by subtracting the pore water pressure from the normal stress , in natural conditions. 28. Normally robust and sunny, the co-anchor of WGCL-TV's nightly news in Atlanta blamed the normal stresses of a busy life. 29. Kerry blinked about 54 times a minute, with a rate of 30-50 blinks per minute indicating a normal stress level. 30. When water pipes break, it's often the normal stresses of traffic and other installations being in the same space ."