All Questions

I have been reading some documents about meteorological data and many of them mention the second moment of wind velocity. I guess it has to do with the way the wind is changing but in such case I ...

On reading about tide formation and the role of moon's gravitational force, I came across the term amphidromic point. Could someone please elaborate this concept?

While google earth-researching the sea floor near Malpelo and Cocos Islands (Colombian and Costa Rican Pacific Ocean), I came along these strangely geometrical structures in the sea floor, located ...

I have a few ideas for organic pesticides/fungicides etc. They're intended to be sprayable, and ideally soluble in water. What are some organic-approved solvents?

DOn't know where it came from, tried google image search, nothing. Gray, smooth with brainlike texture

The headline says it all, I'm looking for a standard way of assessing a lifestyle against environmental criteria. I'm thinking of some sort of lifestyle questionnaire that will produce a score from 0 ...

I am trying to understand how the sediment concentration of a flow affects erosion. I stumbled across this paper by Bagnold (1968) today that uses a form for the stream power equation that I had not ...

Plants do not only come in green but chlorophyll does. The pigment in the plant creates other colored plants other then green. Could a plant grow under an alternative light spectrum like a green sun ...

Found them down by the river and would like to know more about what they are or what they're callled? Thanks

![I found the the rocks is Eastern Arizona by the Black Mesas. They are white with a few orange patches. The inside kind of looks like quarts.

Hydroponic agriculture can make use of vertical space better than traditional agriculture, making volume more important than horizontal area. While we typically don't take this to the extreme, we ...

The mass transport associates at Ekman's problem is the integral of velocity times density from surface (z=0) to the bottom of the Ekman layer (z = -De). In many books i find that i have to take 2 ...

We know that the composition of the crust is SiAl and SiMa and the one of mantle is mostly ophiolites, but why? Which are the geological processes that make this difference exist?

Some geologists say there were times between 770 million years BP and 630 million years BP when ice ages were so profound that the Arctic and Antarctic ice caps met at the equator. This is called the ...

![ is this a fossil? theres only 2 visible material in it. the white one that was been coated by the greenish substance. some parts appear brown because of the thin layered coating of the green ...

The picture below shows an imaginary line on the globe which crosses the Pacific Ocean and works as a rough separator of the Eastern and Western hemispheres. What is this line called in English? I'm ...

Found them down by the river and would like to know more about what they are or what they're callled? Thanks

So I was collecting golf balls in a river and thought it was a golfCan someone help me identify what type of rock this is? what type of rock is this that I found

From a previous question, around 40% of the northern hemisphere is land. Would there be a plane splitting the earth into two equal parts, where in one part there are more land than ocean?

As the sun gets brighter, the oceans are expected to evaporate by the next billion years or so (the vapor slowly gets stripped off into space). The salt, which is less dense than most rocks, will be ...

I found this slightly rude-shaped rock/stone on the South Downs in East Sussex, UK years ago. It was embedded in a chalky path and came out in the two pieces in the photo. It is heavy for its size (...

The New York Times article This Creature Eats Stone. Sand Comes Out the Other End. describes the shipworm Lithoredo abatanica, an organism that appears to "eat solid rock". It links to the item in ...

can anyone help pretty please?? Is this Gold..fools gold just another metal?? 😊

I am on my second vehicle that I have stopped changing my oil after the car has been broke in or around 90k. The first car I made it 400k miles before the rear end went out. The second car I'm at 130k ...

Last weekend I was in Xınalıq(the village in Azerbaijan) and found this snail shell. I am wondering how old is this?

I am looking for a small-scale isobaric chart, which encompasses central Africa. I am interested in the time span of the past few months. Do you know where to find it? Thanks

I've been doing some wikipedia binging and it's come to my realization that it may be in the Earth's best interest to raise the world oyster population as quickly as possible. The basis for this is ...

For every asteroid or meteorite that hits dry land, two hit the sea. If a Manicouagan-sized asteroid struck the deep ocean (but not above a trench),how would the H2O vapour, chlorine, iodine bromine ...

The tropical circulation paper by Gill (1980) approximates vertical velocity as the sum of pressure and diabatic heating terms (equation 2.5 at page 449). Since the pressure is already a function of ...

I have a question about the dynamics of westward propagating vortices. In meteorology, the vorticity tendency is often used to explain the westward propagation of vortices (cyclonic circulation). A ...

So Potassium 40 decays in such a way that roughly 89% of it becomes Calcium 40 and 11% of it becomes Argon 40. When they list these figures are they implying that after 1 half-life, of the 50% of the ...

I found this in my field 80% buried in the ground. I think it’s petrified wood but hoping for some help. Found in Milaca, Minnesota in what’s being used as a cow pasture. Very hard, solid, weighs 38.4 ...

I am new to GIS and just get the idea of slowness. I can understand why people need the slowness in GIS rather than just the reciprocal of velocity. However, I feel the definition of slowness is weird ...

Is the greenhouse effect stronger in the ice covered area or in the equator? Also is it stronger during winter or summer? I am thinking it is stronger in the Ice covered area and during winter because ...

So i found this rock in a creek in north Texas its hard and the shiny bits flake off if you touch it.Its hard to tell form the pic but the bits on it are silver a color , the rock looks like it was ...

My father came back from a volcanoic field called Wudalianchi in China and bought back these rocks. Both of them are dark grey and black with many holes. They are harder than nails and glass. I'm ...

Volcanic eruptions, undersea earthquakes, fissures in the crust, meteoroid accumulation could all be seen as empirical evidence of expansion of the earth. Sink holes and other phenomena could be ...

In Cunningham's paper, "The Kuz-Ram fragmentation model - 20 years on", he makes mention of compressional stress wave velocity, Cp. He only comments that the Cp of granite = 5.2 km/s. I using a ...

Can artificial satellite positions affect tides? on Space Exploration.SE asks if artificial satellites can affect tides, because they are a lot closer than our natural satellite, even though they are ...

I'm currently working on some software for cloud masking, and thus far I have only been using satellite data as recent as spring (northern hemisphere). However, I'm wondering if cloud coverage or ...

I was searching for the climate of Saudi Arabia and I noticed that the city of Abha (altitude of 7000 feet) has a "strange" behavior in its dew point, as numbeo suggests: https://www.numbeo.com/...

Could someone please explain what exactly is shown on the following image? I have a few questions such as: How did the 'Banc à la Ligne' come about? (I know it has something to do with the fact that ...

The GWP (Global warming potential) is calculated over a given time scale $T$ (20 or 100 years usually), defined as the ratio between the energy absorbed by a pulse of 1Kg of gas during time $T$ ...

How and when was the $\mathsf{CO_2}$ removed in primordial Earth atmosphere? What is the main mechanism of this removal of $\mathsf{CO_2}$? Is it dissolving in water? Or rock weathering? Or was the ...

It is said the the Sahara desert was once a dense forest until it was cut. Do trees contribute to precipitation and less trees equal less rain locally?

Can anyone identify what is this? I live in Poland so it might narrow the possibilities.

I downloaded a grib file of oceanography (Mean Wave Period) from ERA-Interim and the longitude values give the value at the points is 0,1, 2, 3....357, 358, 359 If I have geographical coordinates ...

Is there good reference or software that these earthquake raw data will transform into strong ground motion such PGA, PGV and PGD. Thank you!

Why is such an emphasis placed on sea level rise?? As this can be devastating in itself, it can be looked at as a great economic opportunity to put people to work preparing our coastal areas for the ...

Where can I find a model of Earth's past climates and future projections from combined possibilities like magnetic pole movement and other forms of global warming as a map? Without a reference it has ...