Because the centre of the Earth has a molten core.
The pressure created by the considerable weight of the 1 mile of crust creates heat. Even small movements create a huge amount of heat due to friction as particles "scrape" past each other with such pressure.
Pressure 1 mile below sea level is approximately 1,525 pounds per square inch (psi). This is due to the weight of the water column above exerting pressure on the depth below.
about 6370km from the earths surface,convert now to feet
The Rift Valley, specifically the East African Rift system, is a 4000 mile crack in Earth's surface located in Africa. It is bordered by a number of high mountains, including Mount Kilimanjaro and the Ethiopian Highlands.
Elevation above sea level is a measurement of how high a location is compared to sea level. It indicates the vertical distance between a specific point on the Earth's surface and the average level of the ocean's surface. Elevation is commonly used in geography, cartography, and navigation to describe the height of mountains, hills, or other geographic features.
The pressure created by the considerable weight of the 1 mile of crust creates heat. Even small movements create a huge amount of heat due to friction as particles "scrape" past each other with such pressure.
a nautical mile is a minute (1/60th) of one degree of the earths surface so it corresponds to maps
I'd assume Yes. It makes sence that the further you get from the earth the lesser it's pull of gravity, although it would be a miniscule difference. However, the denser gasses that collect within a mile from earth may cancel out this minimal difference or even make it greater.
Maybe because the neutrinos they are looking for aren't in space. Neutrinos have to be 4,000 feet below the surface to be deciphered between a neutrino and a cosmic ray. Once below 4,000 feet they slow down enough to be detected more accurately. (This information was given to us in a tour by staff at the Homestake Mine in Lead, SD.)
One minute of arc as measured at the centre of the Earth covers one nautical mile on the surface of the Earth at mean sea level. One nautical mile is 6080 feet or 1853.2 metres. Therefore one second of arc would be 6080 / 60 = 101.3 feet or 30.886 metres. Lines of latitude are at regular intervals parallel to the equator. The relationship between degrees of latitude and the distance spanned on the earths surface remains constant. Therefore at all latitudes 1 minute of latitude spans 1 nautical mile on the earths surface. Lines of longitude converge at the poles. Therefore the relationship between degrees of longitude and the distance spanned on the earths surface is reduced as the poles are approached. At the equator the distance spanned by 1 minute of longitude would be 1 nautical mile. At the poles it would be zero. To calculate the actual distance on the surface of the earth between two points of known latitude and longitude requires a knowledge of spherical trigonometry to calculate the great circle distance between the two points. The distances quoted are for the surface of the earth at mean sea level. Distances will be increased above sea level and reduced below it.
one mile below the sea
Its hard to explain it, but the equatorial surface gravity is 9.780327 m/s2 or 0.99732 gThe Earths gravity is around 380 ppm (pounds per mile).Sorry if this is too confusing!
There are about 2500 bits of plastic for every sq mile of ocean but there are other pollutants in the ocean too.
Pressure 1 mile below sea level is approximately 1,525 pounds per square inch (psi). This is due to the weight of the water column above exerting pressure on the depth below.
According to the USGS, the water table in Houston ranges between 10 and 30 feet below the surface. (See link below). An exception is in Katy, where it is more than 75 feet deep. From personal experience, the water table is about 14 feet below my property--about 1/4 mile from Oyster Creek in Sugar Land.
about 6370km from the earths surface,convert now to feet
The surface area is 290,000 square miles