hour of UNPAID sick time for every 30 hours of work performed by the employee within the. geographic boundaries of the City of Portland. âºAn employee may earn up to 40 hours of sick time per leave year unless allowed more by the. employer. âº An employee may use accrued sick time: ï· To cover all or part of a shift. ï· In increments of one hour, unless a lesser time is allowed by the employer or it is physically.
atmospheric pressure. noun, Meteorology. 1. the pressure exerted by the earth's atmosphere at any given point, being the product of the mass of the atmospheric column of the unit area above the given point and of the gravitational acceleration at the given point.
Atmospheric and Gauge Pressure. 1  Absolute pressure: The total pressure exerted on a system referenced to zero Pascals, and equal to the gauge pressure plus atmospheric pressure. 2  Gauge Pressure: Pressure referenced to one atmosphere, and is the pressure actually shown on the dial of a gauge that registers pressure relative to atmospheric pressure. For example, an ordinary pressure gauge reading of zero does not mean there is no pressure, it means there is no pressure in excess of atmospheric pressure.