# Tag Info

## Hot answers tagged mathematics

### What is the pressure at the center of the Earth?

It is the pressure gradient that is proportional to the local gravitational force. When that force is integrated over a distance, the pressure gradient is integrated to accumulate a total pressure. ...
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### What is the pressure at the center of the Earth?

The previous answers do a fine job already. But I'll try to add a simple thought experiment. Imagine three objects floating in space, clumping together by gravity: ...
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### What is the pressure at the center of the Earth?

Pressure at the center of the earth is non-zero. You're correct that there's no gravitational force at the center of the earth, but that doesn't mean pressure is zero - the pressure comes from the ...

### 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 ...
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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 ...
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### What types of high-level mathematics are useful in doing climate modelling/meteorology?

The question may generate primarily opinion based answers but while it is open one would like to present the following information. At the outset most of the people I know in the field work in NWP ...
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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. ...
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### What is the pressure at the center of the Earth?

Imagine the whole ball being separated into a handful of concentric shells, with the outermost shell being the crust with the surface, and the lower shells ever deeper, hotter, and ghastly regions of ...
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### How many days has it been since the Cambrian explosion?

As a very rough approximation, one could start with equation (9) from Arbab (2009), https://arxiv.org/abs/physics/0304093 to get the effective number of days per year: T_{\text{eff.}} = T_0 \left(\...

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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 ...
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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.
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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 ...
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