Freebase (0.00 / 0 votes) Rate this definition: Tachypnea. Tachypnea is the condition of rapid breathing. In adult humans at rest, any rate between 12-20 breaths per minute is normal and tachypnea is indicated by a ventilatory rate greater than 20 breaths per minute.
A new tire retains a tread depth from 10/32 to 11/32. This tread depth is usually made to last anywhere from 3 to 5 years, depending on how well it is maintained. To measure the tread of a tire using an available chart, follow these steps: Insert a penny into the tire.
â¦ tread depth, tires do not have enough biting edges and shallower circumferential grooves to effectively evacuate deep snow and slush. The illustration below shows tires (from left to right) at new tread depth, worn to 6/32 and then worn to 2/32.