The drop in oil pressure on a warm engine could indicate several issues, such as worn engine bearings, which can cause a loss of pressure as the oil thins out with heat. It may also be a sign of a failing oil pump or a clogged oil filter that restricts oil flow. Additionally, a faulty oil pressure sending unit or gauge could give inaccurate readings. It's essential to check the oil level and condition, and consider having a mechanic inspect the engine for potential problems.
Pressure variations in different parts of a home can almost always be found within the fixtures themselves. Sometimes, a generalized pressure problem can be traced to nothing more complicated than a well-overdue whole-house water filter replacement! However, the variations throughout your home probably can't be attributed to a single, localized problem.
The common method to measure atmospheric pressure employs an inverted column submerged in a fluid to determine the level at which the column has to be raised to equalize the external atmospheric pressure and the internal column pressure. The height at which the fluid inside the column ceases to increase is correlated to atmospheric pressure. Due to mercury's high density, this level is on the order of inches (~30 inches of mercury at atmospheric pressure). If water were to be used the column would have to be ~32 feet tall in order to develop the equalized pressures between the column and atmosphere.
Planet Mercury's Surface pressure is almost none existent. This is due to its low gravity and extremely thin atmosphere that has been blasted away by solar winds.
Mercury has almost no atmosphere so that could be the answer. The otherpossible answeris Mars, which certainly does have a (thin)atmosphere.
The basic principle of barometer is Torricelli's experiment. Imagine that you fill a tube of one metre length (100cm) with mercury up to the brim. Then close the mouth of the tube with your thumb and invert the tube and place it in a cistern of mercury with its end immersed in the mercury say some 4 cm. Now you remove your thumb. Mercury would come down but it stops at one level to our astonishment. This level would be some 20 cm from the closed end of the tube. So there will be almost 76cm column of mercury in the tube. Why is it so? As mercury comes down the space left vacant will not be having any air molecule and so it is almost vacuum. This is named as Torricelli's vacuum. Now the air outside in the atmosphere would exert a pressure and wants to push the mercury towards this vacuum place. But the weight of the mercury column (76cm) will balance this pressure. Hence we say the atmospheric pressure will be 76 cm of mercury. This is how we have mercury scale for measuring the pressure. Usually pressure is defined as the force per unit area. Hence the unit will be N/m2 or pascal. But we give pressure only in cm or mm of mercury. The reason is explained properly. Same technique is applied in Fortin's barometer and vernier arrangement is made to measure the pressure so accurately.
Mercury has almost no atmosphere and so there is nothing to hold the Solar heat in. As a result the temperature drops during Mercurial nights. The polar regions of Mercury get very little direct sunlight and so they are always below 180 K.
I don't think there is a good answer to this question. Until just recently, almost nothing was known of its atmosphere. Its atmosphere is constantly being generated from its mass, but due to the heat and solar wind, it is almost immediately lost. I presume that means the pressure varies greatly from time to time, as well as from the dayside to the nightside. I hope that helps. I have something to say too! That person ^ had a good point but i have the real answer... The daily Barometric pressure on mercury is Max Barometric Pressure: 291.0 (inHg-27)*100 Average Barometric Pressure: 291.0 (inHg-27)*100 Current Barometric Pressure: 291.0 (inHg-27)*100 my source.. http://wb9tlh.ampr.us/weather/barometric_pressure/barometer.html
Mercury
When the pipe thaws, the pump will run almost constantly. Watch your pressure gauge on the tank and if it will not rise, or has problem building pressure above 30 psi, then yo almost certainly have a broken pipe.
There aren't. Mercury has almost no atmosphere. Therefore, it cannot have storms.
You have a problem with either the pump or the pressure regulator. Call an expert and have this repaired.
Mercury is pitted with craters because Mercury has almost no atmosphere to protect itself.