an inverted open tank is held in place by a force r as shown in fig. p2.41

The absolute pressure in the chamber is to be determined.

3-7 The pressure in a vacuum chamber is measured by a vacuum gage. Therefore, the volume flow rates of the two fans running at identical speeds will be the same, but the mass flow rate of the fan at sea level will be higher. 3-6C The density of air at sea level is higher than the density of air on top of a high mountain. An example of Pascal's principle is the operation of the hydraulic car jack. This is a consequence of the pressure in a fluid remaining constant in the horizontal direction. 3-5C Pascal's principle states that the pressure applied to a confined fluid increases the pressure throughout by the same amount. 3-4C If the lengths of the sides of the tiny cube suspended in water by a string are very small, the magnitudes of the pressures on all sides of the cube will be the same. It is the gage pressure that doubles when the depth is doubled. 3-3C No, the absolute pressure in a liquid of constant density does not double when the depth is doubled. The shortness of breath is caused by the lower air density at higher elevations, and thus lower amount of oxygen per unit volume.

This pressure imbalance may cause some thin-walled veins such as the ones in the nose to burst, causing bleeding. As a result, the difference between the blood pressure in the veins and the air pressure outside increases.

Therefore, the pressure is lower at higher elevations. 3-2C The atmospheric air pressure which is the external pressure exerted on the skin decreases with increasing elevation. Pressure, Manometer, and Barometer 3-1C The pressure relative to the atmospheric pressure is called the gage pressure, and the pressure relative to an absolute vacuum is called absolute pressure.

An inverted open tank is held in place by a force r as shown in fig. p2.41