When the rain fall is 6 cm in a place, does it mean 6 cm per square meter or 6 cm per square foot or irrespective of area? How to calculate the total amount of water collected in an area by this message?
120582
It means 6 cm deep. If the rain stayed in one place (didn't runoff) then it would be 6 cm deep.
262981
yea it is called turgor pressure. that means the amount of water the plant recieves it can be high or low
425376
1 km = 10 hm = 100 Dm = 1000m = 10000 dm = 100000cm = 1000000 mm\n\nSo 1 hm = 1000 dm\nThus, 261 dm = 0.261 hm \nand 3.6 hm = 3600 dm, so perform your area calculations based on either of these conversions\n\nFurthermore, 1 hm²  = (1000 dm)² = 1000000 dm²\nSo 0.9396 hm² = 0.9396 x 1000000 dm² = 939600 dm²\n\nFinally, 1 cm = 10 mm\nSo 1 cm² = (10 mm)² = 100 mm²\n\nThus 7.175 cm² = 717.5 mm²
594849
All you need to do is know the density of water- not too difficult to find! THe psi necessary to support a column then must match the weight of that column. So, if a column is 1inch in area and Hinches high, if you know D the density of water per cubic inch in pounds, the height of the column in inches times this value is the psi needed.\n\nPressure psi=H*D\n\nThis also works for metric, just use cms and kgs as the base sizes.
43170
it's all a bit relative since these days we also have "k"-value which is essential in forecasting precipitation.  it refers to the lift in areas of an airmass. for example, a thunderstorm can form, grow to 40,000 feet, drop its precipitation and go away in only a few minutes.  an area such as this would have a negative value for k, say minus 40 while a very stable area could be plus 40.  while the factors you refer to are important and useful indicators, consider that you can have any combination of humidity and pressure trend and it does not necessarily nean it will rain.  those parameters are the basis of centuries old meteorology and the principles have not changed all that much over time but then the forecasts delivered with these tools were marginal, at best.  the relationship principles you speak of were the basis for a guage to do precisly what you speak of. it's called a barometer and you can find all kinds of information on one on these any even probably find one to purchase for only a few dollars on e-bay or something. a borometer takes pressure trends, considers humidy and does give an estimated time in which precipitation would be expected.  accurancy?  well if i remember right only maybe about 60% or so but don't quote me there.
47090
(A) total square kilometers = 500,000\n(B) square meters/square kilometer = 1,000,000\n(C) total square meters (A*B) = 500,000,000,000\n(D) 2% Reduction in Land (.02*C) = 10,000,000,000\n(E) Liters of water per square meter = 20\n(F) liters of water per day in lost land (D*E) = 200,000,000,000\n(G) Days per year = 365\n(H) liters of water per year lost (F*G) = 73,000,000,000,000
338024
Pressure is force divided by area.You can use various units of pressure. One is Pascals. A pascal is 1 Newton per squared meter (N/meter^2).\n\nSince you have 125 cm-squared you need to convert to squared meters:\n\n125cm^2 x (1m^2/10,000cm^2)= .0125 m^2, area\n\nA Newton is kg x 9.8=75Kgx9.8= 735 Newtons\n\n735N/.0125m^2= 58,800 Pascal
301890
Looks Like Rain.  \n\nthe link in the source is to david dodd's online version of his book.
590642
The weight of water equals the weight of the cloud, since the cloud is nothing but water. If it loses water by raining, the cloud loses that amount of weight.
460248
Must have rained harder there! Rainfall measurements are averages.
349596
square yards can be converted to square feet, but not just yards\n\nHe probably meant yards of carpet assuming a standard width of carpet.
272588
Isolated is fewer than Scattered\n\n\nNational Weather Service forecasters will forecast "isolated" thunderstorms when we are pretty certain that storms are going to form, but we only expect them to affect about 10% of the area. In other words, 90% of the area won't get wet.\n\n"Widely scattered thunderstorms" means 20% of the area will be affected.\n"Scattered thunderstorms" means 30-50% of the area will be affected.
39576
A 40% chance of rain means that wherever you are in the weather forecast area there's a 40% chance that some rain will fall on you during the time period of the forecast. Also means that there's a 60% chance that it won't rain where you are.
631597
Water molecules in the air are continually shifting from liquid to vapor. As the Brownian motion and swirling air currents or breezes are moving them around. \n   Thus some of the water at 100 % humidity will be condensing on cooler surfaces while others are evaporating from warmer surfaces eg. your skin.\n   P.S. Your question didn't say but I hope you are standing under a umbrella or something cause at 100% humidity it's likely to be raining. \n\n  Also humidity is relative to air temperature so if the sun is shining during this sun shower, the true quantity of vapor in the air may continue to rise, while humidity actually falls.\n  Nature is truly a conundrum, and even the best super computers, and weather models fail to predict what the weather will do.\n So don't strain your brain.
197619
Since the prehistoric era. It doesnt take a genius to observe the correlation between rain and clouds. It doesnt rain when there are no clouds. Clouds disappear after a rain.
366546
In the UK the department for met office collect trhis data as well as the Environment Agency\n\nThere are tow methods of collecting the data. There is storage and also a tipping rain gauge.\n\nA storage bucket is how many of the above describe, it is a cylinder sunk in to the ground with an opening that rain falls in to, the areas are mathmatically precise so the area of collectiojnh matches the dimensions in the collecting cylinder.\n\nWhen weathermen say that X recived 10mls of rainfall in 5 mins, they will have used the tipping rain bucket.\n\nThe tipping bucket is like a bowl with a flat bottom. and that bottom is on a very sensitive hinge. When 0.2mm of rain has fallen on that plate, it tips it away and sets o0ff a trigger count, so if there are 5 trigger counts in 1 minute, they know it is raining at a rate of 1mm per minute.\n\nEach has its advantages and disadvantages. The tipping bucket may in one day say there was no rain when in fact there may have been 0.1mm. The storage bucket may say there has been a lot of rain, but wont give much idea with regard to intensity.\n\nHope that helps.
270328
30cm=1ft\n30*6=1*6\n180cm=6ft