What is Sea Level?
FREE FACT: An oblate spheroid is a special case of an ellipsoid where two of the semi-principal axes are the same size.
Tags: 2013, Sea Level Rise, Video
Categories: Environment, Oceans, Science, Sea Level Rise, Video, World News
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THANK YOU FOR A NON 10 SECOND VIDEO!!!!
When we say Mt. Everest is 8850m tall, how do we know what sea level would
be beneath the mountain? NEW VIDEO!
Wow! I never would have thought how much work has gone into this seemingly
intuitively simple concept – sea level!
Scientists of all kinds – the uncelebrated heroes of our civilization, just
doing their work.
This is amazing and how these videos should be. Imagine a 10 second video
which only says “Seal level is measured by scientists calculating gravity
if the mountain is not there. this calculation is programmed into GPS
satellites”
The only thing that stuck was that Gravity was stronger or weaker at
different points on the earth. Quick tell me where gravity is weakest so
that I can take my wife there have her step on a scale and tell her, “See
honey, you’re not fat!!!”
I don’t think I’ve ever put that much thought into sea level before. My
mind is kind of blown by this.
What if there was an identical version of mount Everest, but made of
osmium. Since it would have more of a pull on the water wouldn’t that make
its sea-level higher, and therefor shorter even though its identical.
I remember my father, a physicist, explaining this to me as a kid. He used
the geodetic model in his job, writing targeting programs for
intercontinental ballistic missiles.
Where do you take it’s base from? Sea level as defined by without gravity?
Sea level with gravity? The sea floor ( which is so variable it is useless
to measure against ) or the centre of the earth? (Which has more to do with
the region then the mountain itself)
Well it’s about more of the physics behind sea level, than facts about the
planet
Sea level is not the same everyplace?
Isn’t this more minuteearth content? Either way really cool video!
Isn’t this more minuteearth content? Either way really cool video!
Pesky continents moving around on the earth’s surface? Everything was
pretty awesome, up to that little error. Continents don’t move around. The
water does. Land masses spread apart as the earth is growing bigger and
bigger. But that’s another story. Otherwise, GREAT JOB! This is the best
explanation of the controversial sea level issue, on earth. Literally. This
makes history.
There is so much I don’t know that I wish I did. Thanks for making it one
thing less.
Longer video=great! Thanks!
Awesome video. Just one question: shouldn’t this be on the MinuteEarth
channel?
my mind is blown…..
Great video! Would you tell me how do you make your animations?
Whoa….very thought provoking. Didn’t realize how much of an elipsoid the
earth was.
Aren’t human beings such awesomely curious creatures?
Waaay over my head.
Great visual explanation of Sea Level (in case you didn’t already know).
Great visual explanation of Sea Level (in case you didn’t already know).
I don’t think I’ve ever put that much thought into sea level before. My
mind is kind of blown by this.
I did not understand your free fact. -_-
Just when you thought it was simple …
Funny how all these new media creations promote the old media they are
supported by. Is there anyone under 20 still reading? You know, paper (or
in this case: vocals) containing information that requires attention spans
way over a minute, without providing visual input.
(I’m old(er), so I’m allowed to be a slow fart!)
Defining what the sea level is might not be as simple as you think. This
three-minute video is most educational. Skip a few kitten pics today and
learn some geodesy instead.
Never knew that. Very awsem!
I did not realize that it was so complicated, i never thought it would take
a bunch if brilliant people to figure it out
Shouldn’t this be on MinuteEarth?
Everytime I watch these videos, I end up with more questions than answers.
Which is *exactly* why I love these videos!!
This is the most informative MinutePhysics I have seen. 100m differences in
sea level due to gravitic variations? I think I said ‘Wow!” and “That’s
wild!” half a dozen times while watching.
Okay, love the info, but dude talk a little slower! For some of us english
is a second language and it’s hard to keep up with all this new information
thrown at us! We gotta understand too mate :P
I seriously love this channel. If I teach physical science again I will use
the videos as part of my class. This particular one will be used in my
Earth science class next year.
i can read chinese do you mind putting the free fact in english please
*nice*
There are so many things I wasn’t aware of in this seemingly straight
forward concept.
Ok, this is really not as obvious as I thought! I guess 99% would answer
incorrectly on how this is calculated even if they had one hour to think
about it.
this is genius stuff give me some more sea level shit !
Aren’t ya glad you don’t have to do this kind of math to figure out what
pattern altitude you should use :)
Not as simple as I thought.
So… what is sea level?
I like this but that’s to fast
wow!
Sea level, how does it work?
do you first speak and then fast forward that a lill bit?
I feel like your voice changed, and it is hard for me to get used to. I am
not sure why this is just now on my subs.