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Velocity of Current
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Fifth segment of the Ocean Odyssey describes the velocity of current. In the fifth segment the tree house detectives perform a series of experiments. In the first experiment they measured the velocity of current, in the second experiment they see who can swim the fastest against the current, and in the final experiment of this segment they test to see if people float at different speeds.
Are you ready for some research?
00:00:00
I love doing research with Dr. D.
00:00:06
Did you bring the items I requested?
00:00:08
Of course.
00:00:10
I brought some old tennis shoes and Katherine brought some soccer cones.
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Great.
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I wanted to meet you here at the Hubba Hubba Highway because the speed of its current is
00:00:15
a lot like the Gulf Stream.
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It looks like it's moving pretty fast.
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Does the Gulf Stream move that fast?
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Let's find out.
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We've got a stopwatch and a measuring tape that can find its velocity or speed.
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I know the formula for velocity.
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It's distance divided by time.
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So if we measure the distance between two points and then time a floating object between
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them, then we can find the velocity.
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Very good.
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We need to do five trials.
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You should always do more than one trial in an experiment and then find the average.
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Excellent.
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Next, we need to decide how far apart the two points should be and mark the distance
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with the cones.
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How about putting them ten meters apart?
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Fine.
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What object should we time?
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Oh, I get it.
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That's why we brought these tennis shoes.
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That's correct.
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Let's get started.
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Let's see.
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Our five trials averaged 8.65 seconds.
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So if we use the formula and divide 10 by 8.65, that means that the velocity is about
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1.2 meters per second.
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The Gulf Stream's velocity averages between about one and one and a half meters per second.
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Wow.
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Both the Hubba Hubba Highway and the Gulf Stream move really fast.
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Now it's time for you to experience the power of the Gulf Stream by swimming against
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the current.
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This should be easy.
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Let's see which one of you is a stronger swimmer.
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I predict no contest.
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That's right.
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I'll be the champ.
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Wow.
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That was a lot harder than I expected.
00:01:59
I can certainly see why it took two weeks longer to get mail in colonial days when the
00:02:11
ships were sailing against the current.
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Okay.
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There's still more research to do.
00:02:18
Let's float around the Hubba Hubba Highway and see if we all float at the same speed.
00:02:20
That sounds like my kind of research.
00:02:24
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- Idioma/s:
- 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:
- 598
- Fecha:
- 28 de mayo de 2007 - 15:34
- Visibilidad:
- Público
- Enlace Relacionado:
- NASAs center for distance learning
- Duración:
- 02′ 42″
- 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:
- 16.35 MBytes
