No, sea levels are not constant. Sea level is defined as the average height of the ocean's surface (such as the mean of low and high tide), which changes at various times during the year due to temperature fluctuations, gravity, glacial melt, etc. Also, sea levels have fluctuated historically over the ages. Satellites are now used to measure sea levels.
No.
Sea level is constant throughout the world on all oceans and on the beaches of all continents.
The height of a landform on Earth is DEFINED as its height above sea level since sea level is the closest thing on Earth to a constant or standard starting point. Sea level itself changes with the tides and wind and weather, so we use what is called "mean sea level" which is an average of measured levels at a given place over an extended time.
It isn't constant anywhere, no. 1013.25 mb is simply the average pressure, which is particularly important at sea level because that is how observations are standardized. But atmospheric pressure always varies no matter where you are, as a consequence of having weather.
above sea level
The lowest point in Hawaii is in the Pacific Ocean at sea level. what the heck!
Well, sea level is the standard by wich other things are measured, so zero is the answer. Sea level is sea level. Compared to what?
The level of the ocean's surface is called sea level. It serves as the baseline for measuring elevation and depth.
14.7 psi = sea level. 15.2 psi = 1671 ft below sea level
No it is not the sea level definitely depends on where you are located like in Florida is considered below sea level and in Colorado they are above sea level
It has an elevation ranging from sea level to 520 feet above sea level.
That is really a strange question. Never heard that any part of Germany is below sea level.