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Ocean Pressure

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Subido el 28 de mayo de 2007 por EducaMadrid

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Ninth segment of the Ocean Odyssey describes Ocean Pressure and how that limits the depth to which people can dive. In the ninth segment they discuss alternative means of exploring deep parts of the ocean.

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Hi, Tony. Welcome to the underwater research lab. 00:00:00
Please, Dr. D. Thanks for inviting me. 00:00:05
I understand that you have some exploration in mind. 00:00:07
I certainly do. 00:00:09
I was amazed to find out how much scuba divers can accomplish 00:00:11
when they stay in an underwater habitat like the Aquarius. 00:00:13
Scuba divers generally have a maximum depth of 40 meters 00:00:16
and with special equipment maybe up to 600 meters. 00:00:19
Why can't they go deeper? 00:00:22
Well, the real problem is pressure. 00:00:24
The deeper you go in the ocean, the greater the pressure. 00:00:26
Why is pressure a problem? 00:00:28
Well, look at this bottle. 00:00:30
How did you crush the bottle, Dr. D.? 00:00:32
I didn't. The pressure crushed the bottle as I brought it down to the lab from the surface. 00:00:34
Every 10 meters out in the ocean, the pressure increases by one atmosphere. 00:00:37
So, what if my treasure is, say, theoretically deeper than 600 meters? 00:00:41
You can use a submersible or mini-submarine. 00:00:48
They have thick reinforced walls instead of increased air pressure. 00:00:50
It can go as deep as 6,500 meters. 00:00:53
So, you're saying if I brought a glass bottle down to the Aquarius, 00:00:56
it wouldn't collapse because it's stronger than the plastic bottle? 00:00:59
Very good. Another type of submersible is an ROV, or remotely operated vehicle. 00:01:01
In fact, I have one right here. 00:01:06
You're kidding. 00:01:08
Well, mine is a lot smaller than a research vessel and it uses radio control instead of a cable. 00:01:10
Maybe I could use an ROV to help with my treasure hunt. 00:01:15
Good idea. Besides locating large treasure ships, 00:01:17
we can also use these vehicles to inspect oil rigs and pipelines 00:01:20
and to investigate ocean ridges and geothermal vents. 00:01:23
What are these? 00:01:26
These are my two other submersibles called RBUVs. 00:01:28
Let me guess. Rubber band underwater vehicles. 00:01:31
You're really on the ball. Let's go outside and have an RBUV race. 00:01:34
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Idioma/s:
en
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
757
Fecha:
28 de mayo de 2007 - 15:34
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
01′ 49″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
11.04 MBytes

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