7
votes
How is relative humidity determined from a wet and dry bulb readings?
Edit: 1 May 2021
The following procedure uses the less accurate method from page 455 onward from the scanned sections of the book pictured below, from the original answer.
The procedure is a ...
- 25.1k
7
votes
Accepted
How do I convert kg·kg⁻¹ to ppbV (parts per billion volume)?
So if you have a mass-mixing ratio, you effectively $\frac{ \text{kg pollutant}}{\text{kg dry air}}$. PPBV is parts per billion volume, or number of molecules of pollutant per billion molecules of dry ...
- 8,837
4
votes
Accepted
Is there a general equation to know how big of an area is affected by an earthquake?
No, there isn't, because the area affected depends on so many factors, some of them unknowable. Magnitude, cause, depth, geology (which may be very variable in different parts of the area) etc. ...
- 4,711
3
votes
Accepted
How to produce random numbers from seismic data?
This quote is from the article:
Use of Local Entropy: after collecting data from the external sources, it is necessary to generate entropy locally. For that, we use our own TRNG (True Random Number ...
- 423
3
votes
How to determine (lost) surface (km²) of a country when both population and population density have changed?
$\text{Poulation density} = \frac{\text{Population}}{\text{Surface}}$
Re-arranging
$\text{Surface} = \frac{\text{Population}}{\text{Poulation density}}$
In your case
$\text{Surface} = \frac{100,...
- 17.7k
3
votes
Math needed for Hydrology, specifically surface water hydrology
Math is very important for hydrology. Especially for surface water problems, you require understanding of differential equations while open-water hydraulics like backwater calculations are complex. If ...
- 413
2
votes
Accepted
Growth of polar vortices vs projective geometry; what does this figure mean?
I suspect that this diagram has nothing to do with polar vortices in the meteorological sense. It’s hard to prove a negative, but digging into the source of this image led me in some very non-...
- 5,429
2
votes
Accepted
how much entropy is there in the shape of a rock?
This would actually be an interesting research project. The ability to do a 3-D scan and model of a rock's shape in a manner that is fast enough to get a statistically meaningful number of rocks ...
- 822
2
votes
Is There a Correlation Between Earthquake Magnitude and the Deformation Observed in the Rock?
Generalizing such relationships is, as suggested above, hard to impossible - but for well studied and understood systems such correlations have been observed. For instance there is a clear, and almost ...
- 2,120
2
votes
Accepted
How or where to find out how many percent of the Earth's surface is above/below a certain altitude?
What you want is known as a hypsograph or a hypsographic/hypsometric curve which shows the distribution of elevations of the Earth's land surfaces (and can be extended to include the distribution of ...
- 1,077
1
vote
How to produce random numbers from seismic data?
Any unpredictable source that can contribute to numerical entropy is a good source for trying to generate truly unpredictable random numbers. People even use the somewhat unpredictable timing of how ...
- 24.7k
1
vote
Can we know if a numerical model will converge or not according to the boundary conditions?
The proposition of this question says nothing about the size of the domain, or how the domain has been discretized. And yes, the numerical model will converge if the necessary boundary conditions ...
- 11
1
vote
Recommend books on Lat Long
https://www.amazon.com/Longitude-Genius-Greatest-Scientific-Problem/dp/080271529X
I think you should read the book by Dava Sobell. It will give you perspective and lead you to original source ...
- 11
1
vote
Is There a Correlation Between Earthquake Magnitude and the Deformation Observed in the Rock?
Surface Displacement vs. Earthquake Magntidue
This answer presumes that you are looking for a relationship between earthquake displacement and earthquake magnitude. I think what you are looking for ...
1
vote
Is There a Correlation Between Earthquake Magnitude and the Deformation Observed in the Rock?
You are probably thinking of pseudotachylite veins, which are interpreted as "fossil earthquakes" (among other things). To my knowledge, the first who tried to quantify some seismic ...
- 8,345
1
vote
Is There a Correlation Between Earthquake Magnitude and the Deformation Observed in the Rock?
There is no mathematical equation relating geological deformation with earthquake magnitude.
Different faults move differently. Some move horizontally (strike-slip faults). Other move vertically (...
- 25.1k
1
vote
formula to convert precipitation in mm/h to runoff in m³/s
There is no such simple relationship between rainfall and runoff (I wish there was!).
How much of the rainfall ends up as runoff depends upon at least the following variables:
temperature,
humidity,
...
- 14.3k
1
vote
Accepted
formula to convert precipitation in mm/h to runoff in m³/s
When we say there was 1 mm (or 0.001 m) of rain, it is assumed that it is on a 1 square meter area, so it is equivalent to a volume of water of 0.001 $\small\mathsf{m^3}$ (or one liter). So first you ...
- 8,345
1
vote
What is the lowest latitude for which if the ideal solar energy received each day for a year is graphed, the graph would contain one peak?
Any area south of the northern polar circle will have one peak per day,and the same goes for the southern polar circle any area north of this will have one peak per day,the polar circles is at 66,33 ...
- 1,884
1
vote
Is there a general equation to know how big of an area is affected by an earthquake?
Yes, using GMPES. E.g., you can look at the USGS shakemap which includes some measure of intensities such as PGA/PGV. Just choose an appropriate cut-off value and you have your area.
- 2,381
1
vote
What makes up a gradient
In addition to other information others have written in comments, gradients measure the rate of change of "a quantity".
For example, take a hill. As you walk up the hill your elevation increases ...
- 25.1k
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