Why the tip of Allpin made sharp?
The tip of an allpin is made sharp so that large pressure is exerted at the sharp end and it can be driven into with less effort.
What are the two factors which does not change the vertical height of mercury column above the free surface?
The density of mercury is greater than that of all other liquids, so only 0.76 m height of mercury column is needed to balance the normal atmospheric pressure. The vapour pressure of mercury is negligible, so it does not affect the barometric height.
What is the effect on the vertical height of the mercury column in a barometer when taken on top of a mountain?
It will just make it harder to read. Like tilting a bottle of soda, the mercury will tilt in the tube so that the reading on the side closest to the earth will be higher and the side away would be lower. In (D) at the top of a mountain the air pressure is much lower so the vertical height will be lower.
What effect is observed on the vertical height of the mercury in a simple barometer when a drop of water is introduced into the space above the mercury?
the barometer height will decrease if a drop of water is introduced in a mercury barometer, which is due to the pressure exerted by water vapour.
What effect is observed on the vertical height of the mercury in a simple barometer?
the length of mercury column in the tube increses. the vertical height of the mercury column decreases. When a mercury barometer is tilted, then the vertical height remains constant but length of mercury column increases.
How is the reading of a barometer affected when it is taken to a hill?
Solution. Reading of a barometer would fall if it is taken to a hill as pressure decreases with increase in height.
What happens to the level of mercury in the barometer tube when it is taken down a coal mine?
the temperature will increase as one moves down the Earth’s crust. and since there is almost very less wind so the warm will be not able to distribute the temp. and moderate it. Hence the Mercury will rise in the barometer tube.
Why is mercury used in a barometer instead of water?
Mercury is commonly used in barometers because its high density means the height of the column can be a reasonable size to measure atmospheric pressure. This is because mercury is 13.6 times more dense than water.
What does it mean when a barometer rises?
A rising barometer indicates increasing atmospheric pressure and a falling barometer indicates decreasing atmospheric pressure.
Do fish bite better on a rising or falling barometer?
Low Pressure (29.60 and under/Cloudy/Rainy Weather) – Fishing Slows. Go at them slow in deeper water or near cover. Rising Pressure/Improving Weather – The fish are slightly active. Falling Pressure/Degrading Weather – Best Fishing.
Why are the barometric pressure drops when there is a storm?
In the atmosphere, cold air is denser and drier than warm air. When cold air encounters warm air, the warm air rises over the cold air and makes surface air pressure drop. As a result, a low pressure system forms and winds begin to blow. Storms form in response to changes in air temperature.