gradient
its apparent depth is 1.5m.
The greater the depth the greater the pressure.
The wave base is the deepest depth below the oceans surface that is affected by the waves passage.
The pressure at the same depth in any container doesn't depend on the size of the container. The pressure one meter below the surface is the same in a pond, a lake, a swimming pool, the middle of the Pacific Ocean, or a bath-tub.
At depths between 50 to 200 km below Earth's surface, temperatures and friction, along with the presence of water, could cause melting of subducting crustal material. Rising currents of mantle rock could melt from decompression at shallower depths.
2
temperature increases with depth
50km
1.4
it increases
As the depth increases, the density increases also.
At depths of 50 to 200 km below Earth's surface rocks will melt.
A "geothermal" spring is a "hot" spring where the water is hot at the surface, heated by hot rocks or magma at depth.
none of your business
geothermal starts at the outer edge of the earth's crust and gets hotter the deeper you go. The gradual increase in the temperature as the depth increases is called the geothermal gradient. As you proceed through the crust the gradient is gradual. When you break through the upper mantle the temps then rise almost exponentially.
Check your thermometer. That's how hot it is on the outer crust where you are. There exists a geothermal gradient where temperature rises with depth from the surface. See the link below.
Yes it is.