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Chilton repair manual sez: Exhaust pressure high / EGR (PFE/DPFE) circuit voltage higher than expected. (goggomobil)
Higher air pressure forces the mercury farther up the tube.
At lower temperatures water will freeze and mercury will not.
Evangelista Torricelli is known for his invention of the barometer in 1643. His original device consisted of a long tube of glass (which contained a vacuum) on top of a larger container of mercury. The pressure from air pressing down onto the exposed surface of the mercury would push the mercury upwards into the tube; thus, the higher the air pressure, the higher the mercury level. Air pressure was then measured using "millimeters of mercury", which corresponded to the mercury level within the tube.
Air is "pushed" into the open end of a barometer when the pressure is higher, meaning the mercury closer to the closed end of the barometer - where the pressure is measured - will rise.
Because mercury is 13.6 times denser than water it is able to measure higher pressures.
It refers to the barometric pressure in the hurricane's eye. A lower barometric pressure generally means a stronger storm. Hg is the chemical symbol for the element mercury, a metal that is liquid at room temperature. Barometric pressure is often given in units of either mmHg (millimeters of mercury) or inHg (inches of mercury). Both units refer to the early barometers, which consisted of a vacuum tube with its open end immersed in a dish of Mercury. Pressure was measured based on how high up the mercury moved in the tube, which climbed higher with higher pressures.
Is it possible you're pressing the green "no overdrive" knob when you put the car in gear? This will lock-out higher gear range. Just a thought.
For a 1996 Mercury Mystique, the recommended engine oil is 5W30 (4.5 quarts) for a 4 cylinder, and 5W20 (5.8 quarts) for a V6. Given the vehicle's age and assumed high mileage, it would also be acceptable to go with a heavier weight (higher viscosity), such as a 10W30 instead of 5W20 or 5W30. It also depends on the engine condition and your climate.
since mercury (Hg) is much more dense than water, x mm of Hg is a higher pressure than x inches of water column (in wc) or x mm of water column.Inches of water and millimeters of mercury are both the measure of pressure by equating the pressure to a height of a column of fluid (pressure-fluid height relationship) and thus, the density of the fluid greatly affects the pressure measurement.
Pressure in a fluid at a certain depth H is proportional to the density of the fluid. Since Mercury has a much higher density then water it will exert a much larger pressure at the same depth.
Pure water at 0 deg C and at a pressure of 760 millimetres of mercury freezes. If it is any other liquid, or if it contains solutes or is at a higher pressure it will not.