Ocean Definition and 190 Threads

http://www.foxnews.com/scitech/2011/07/11/lost-world-atlantis-like-landscape-discovered/?test=faces (Courtesy NileQueen) It's not the first time to discover land under the ocean, anybody remember the lost city Mega in Cuba? There is another interesting element here, 56 million years...

[b]1. I am currently looking at the area of spectral analysis applied to ocean waves. I have a set of "raw" recorded data of wave height, direction, frequency etc. I understand that spectral analysis is used to validate/process wave data recorded by instruments. [b]2. Have I more or less...

Hi all, I would appreciate your guidance on the following: I am currently looking at the area of spectral analysis applied to ocean waves. I have a set of "raw" recorded data of wave height, direction, frequency etc. I understand that spectral analysis is used to validate/process wave data...

Homework Statement My solution isn't working out for this question. Radio waves of wavelength 125 m from a galaxy reach a radio telescope by two separate paths. One is a direct path to the receiver, which is situated on the edge of a tall cliff by the ocean, and the second is by...

something that is going on that seems odd to me is the pumping of the radioactive liquid waste direct to ocean. I am sure there must be a significant amount of long lived/insoluble/particle type rad waste in there? Is there not a good chance these hot particles could get caught up in ocean...

Alright, so let's say you've got two air tanks. They both have the same capacity. So, let's say we bring the tanks down into the ocean where the atmosphere is 4x that at sea level and fill both of the air tanks to about their max capacity. (They hold 4x the air that they did at sea level because...

Unusual paper: http://arxiv.org/abs/1102.1108 Some planets get ejected from their systems and wander off into interstellar space. The authors investigate what would be needed for such a planet to remain able to support ocean-floor life for a protracted period on the order of a billion years.

europa is the prime candidate in our solar system to harbor some kind of life. most probably microbial but nonetheless very exciting stuff. what the hell is NASA doing. apparently there is a europa Jupiter system mission but it just involves flybys and mapping the moons. why not go all out...

[b]1. A stationary research ship uses sonar to send a 1.18 × 103-hertz sound wave down through the ocean water. The reflected sound wave from the flat ocean bottom 324 meters below the ship is detected 0.425 second after it was sent from the ship. a. Calculate the speed of the sound wave in...

This isn't a math question really, and I'm really sorry if I put this in the wrong section. Still, I've been going over fluid dynamics in class and I have a question about Pascal's Law. It may be silly, but it's one that's been kinda bugging me. Pascal's Law says that any change in pressure of...

Homework Statement Water is pumped from the ocean to a large reservoir on land. A total lift of 140m. At a rate of 60 cubic meters per hour and eject it with a speed of 65 m/s. If one cubic meter of sea water has a mass of 1,025 kg, find: a) The work done in lifting the water b) the work...

Homework Statement Why are Na and Cl the two most common ions? Why doesn't the ocean's salinity change The Attempt at a Solution I would guess that they're the most abundant ions simply because there occur more often in nature than the other elements in sea water. As for the second...

...Earth stopped rotating? Most of North America would be swamped under poleward rushing oceans. A whimsical but cool look at an Earth stopped in its tracks... From http://bigthink.com/ideas/21768".

Can someone point me to 3D model of surface of the land and ocean floor of the Earth, or a grayscale elevation map so I could make my own 3D model from it. I was curious - I wanted to play a bit with such "flat" (rectangular i.e. not spherical) 3D model of Earth's relief by placing a flat...

Instead, the patches are more like a plastic soup. An island of trash would have been easier to clean up.

Anyone know what causes the weak gravitation field at the bottom of India / Indian Ocean (see link below)? Thanks http://news.bbc.co.uk/2/hi/science/nature/8767763.stm

We did an experiment to find out how water is heated as a result of sunlight. We had a bowl of water which we heated with a copper plate on the water surface, through which we sent a sinusoidal current. We didn't use a lamp, because water doesn't absorb visible light very well and since our bowl...

Hello! I have a geology question; a subject which I know next to nothing about. Regarding tectonic plates, I heard someone suggest that when there is oceanic trench formation, it is always accompanied by mountain/hill formation. The websites I have looked at say that there MAY be mountain...

Can anyone explain to me the cause of this massive cold water region in the north atlantic. Is it winds stirring up cold deep water (ekman wind?) Is it a natural variation in currents bringing colder water to the surface? Is there any relationship to the regions north and south of it...

A 205 mL sample of ocean water is found to contain 7.2 g of NaCl, what is the molarity of the solution? (The problem also says, with respect to NaCl?) Ok, now, what do they mean with respect to NaCl? What is it usually in respect to? Anyways is this the correct way to do this...

Homework Statement Ocean waves with a wavelength of 120 m are coming in at a rate of 8 per minute. What is their speed? The Attempt at a Solution \lambda = 120 They are coming in at a rate of 8 per minute, that is 8 in 60 seconds. So the period is T=\frac{8}{60}=0.13 Now we...

How can the ocean simultaneously release CO2 and decrease in pH? Currently the ocean is acidifying, as it absorbs about a third of the fossil-carbon dioxide that we emit, which then in part assumes the form of carbonic acid. But in the future, if the increasing atmospheric greenhouse effect...

Naive: how are black smokers at the ocean rifts colonized? Ok, please don't hammer me. It's a very naive question. I assume that abiogenesis is not occurring at the black smokers, or there would be worldwide press about it. So how can the colonizing life forms (tube worms, lobster things...

Ok, I have a question about this since everyone seems to say we are stupid for trying to explore space when we haven't even fully explored our planet. We can't explore the lowest reaches of our own oceans because of the massive amount of pressure right? well I don't understand why someone...

1. An iceberg of mass m_{ice} is melted by the ocean at temperature T_{ocean}. Knowing that the iceberg is at a temperature T_{ice} what was the volume of water needed to melt the iceberg? 2...

Homework Statement A fisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. It takes a time of 3.00 second for the boat to travel from its highest point to its lowest, a total distance of 0.690 meter . The fisherman sees that the...

Homework Statement A lost shipping container is found resting on the ocean floor and completely submerged. The container is 6.3 m long, 2.1 m wide, and 2.6 m high. Salvage experts attach a spherical balloon to the top of the container and inflate it with air pumped down from the surface...

Will we ever colonize the oceans?

Homework Statement This is a general question, not something I have been assigned for a subject. I am just wondering how you can calculate the mass a float can support in the ocean. I have no idea how to go about working this out, any help would be greatly appreciated For example, how...

Hi all, I m not a physicist but a biological oceanographer. I would like to know how should I consider space-time variations of tiny cells in the ocean? Usually people deal with space and time separately but do not compute the data over a space-time scale (which I believe is important...

http://www.sciencemag.org/cgi/content/abstract/326/5953/713

Hi, a search on google will reveal that an ocean wave is both transverse, and longitudinal. Another search will also reveal that a transverse wave cannot propagate through a liquid. One of these statements is not quite right, is it that water is a special case liquid that can propagate...

This is hypothetical question, but it does go the ability of polar ice caps to form and survive. Years ago I read about a computer simulations of a planet with a single circular continent centered on the north pole extending to the 30th N parallel. The continent was entirely flat with an...

Homework Statement Find Wavelength and Velocity of an Ocean Wave. Known Variables: Water Depth=300m Frequency=8secs Amplitude=3m Homework Equations Wavelength (m) X Frequency (s-1) = velocity (m/s) v=velocity The Attempt at a Solution I have 2 missing variables for both...

I have been reading through some of the older papers concerning CO2 levels in the 20th and century, CO2 residence times, and the carbon cycle. (The papers this linked to article and paper are referencing. Another source is the 2300 papers Ian Plimer references in his book Heaven and Earth.) What...

RE: Ocean Waves: 1. Linear Wave Formula - What is the average sea state that is capable of producing a 20 ft. wave? 2. Schoenbergers Wave Formula – What is the smallest average sea state that is capable of producing a 20 ft. wave?

Homework Statement Ships measure the distance to the ocean bottom with sonar. A pulse of sound waves is aimed at the ocean bottom, then sensitive microphones listen for the echo. The graph shows the delay time as a function of the ship's position as it crosses 60 km of ocean. Draw a...

Hi. I've been doing some reading about ocean acidification lately, and there is one concept that I don't understand, and that I can't find a good explanation for. This is a good forum, and I hoped that you could help me. When I read about ocean acidification on Real Climate's post on this topic...

Are there oceans of liquid water in Uranus and Neptune? I remember once reading that there were.

This question would perhaps be an ocean engineering question, but since we don't have a forum for that, I thought mechanical engineers would have some idea about this. My background is electrical engineering, and I have little knowledge about the mechanical issues when operating at the surface...

My friend and I are arguing about sea levels in relation to global warming. I argue that if one island is experiencing an increase in ocean levels then the surrounding ones should likewise. Apart from tidal effects, atmospheric low/high pressures, contained inlets etc, do not all bodies of...

This paper "Earth's energy imbalance: Confirmation and implications. Science, 308, 1431-1435 Hansen et al" pdf available http://pubs.giss.nasa.gov/abstracts/2005/Hansen_etal_1.html" seems to have been very influential in research on climate change. The basic argument is that very little of...

The speed of water waves in shallow water is given approximately by: c^2 = gh A seiche is a standing wave in a shallow water basin with antinodes at ends and a node in the center. A lake is approximately a channel 9 km wide and 300 m deep. Calculate the seiche period for such a channel...

How is it one can hear the sound of the ocean in some sea shells?

I'm interested in the physical behavior of surface waves in an oil-based ocean. Suppose, if you will, an ocean created of crude oil. How would its waves behave in relation to our own oceans' waves? I think oil waves would be slower and lower in height, but how much slower and lower I...

I've heard this before, and am just wondering if you guys think it's true. The saying is "There are more atoms in a cup of water than there are cups of water in the oceans of the world." I am pretty sure I heard this on some Science Channel show about atoms. I know it would depend on the...

This is a 3 part question that i have attempted to answer. I'm pretty sure I'm on the right track but i think i made 1 or 2 small mistakes along the way. the question states: The average depth of the ocean is 3.8km and the ocean surface area is 360x10^12 m^2. The average upwelling rate of deep...

The youngest bottom waters in the North Atlantic had a [delta 14 C] value of approx -70o/oo (o/oo being parts per thousand). Bottom waters in the South Pacific have a [delta 14 C] value of -170o/oo, while bottom waters in the North Pacific had a [delta 14 C] value of -230o/oo. a)In the [delta...

Homework Statement The area of the Earth that is covered by water is 361×10^{6} km^{2}, the volume of the water is 1.4×10^{9} km^{3}, and the mass of the water is 1.4×10^{21} kg. The density of liquid water, as a function of temperature, can be approximated by ρ = 1008 − T /2 kg/m^{3}, where T...

Ok. At a depth of 1000m, the ocean temp is 4 degrees celsius and the speed of sound is 1480m/s. From lab experiments, for every 4m/s increase in velocity, the temp increases by 1 degrees. When the distance is 8000km, the smallest time change that can be detected is 1s, what is the smallest...