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Simple Conversion factors - Contenido educativo
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In this video, we are going to revise how to change unit compression factors.
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This is something that we studied last year, but we are going to do a revision with these two examples.
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So, let's start. We want to know how many grams are there in 0.005 kilograms.
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What we need to do first is write in the information that we know that there are 0.05 kilograms.
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I'm going to write this here 0.05 kilograms okay this is what I have and I
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want to change to grams okay so I'm going to write this here and here sorry
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I shouldn't write this sign here this goes I have to multiply this number by a
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fraction this is the conversion factor okay the conversion factor should have
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the unit that we want to take out here. I will explain the reason for that and the
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unit that we want to have in the end over the line. And then I need to write
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numbers below and over the line so that below and over the line is the same. So we
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know that one kilogram is 1,000 grams and now the reason for writing
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kilograms below the line is that we multiply this by this. Kilograms cancel
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kilograms because they're in a fraction and I am left with grams. So I do the
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maths now. 0.05 times 1,000 is 50 grams. This is a simple example.
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let's go with something a little bit more difficult how many minutes are
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there in three days so in this case we start with three days and we want to
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change to minutes maybe you know how many minutes there are in a day but you
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normally don't know that don't know that you know that one day I'm going to write
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it here because you want to take it out has 24 hours okay so you can write this
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compression factor and then you also know the conversion between hours and
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minutes and you know that one hour is 60 minutes doing things like that you can
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see that days cancel days hours cancel hours and you are left only with minutes
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and now is what we are going to need our calculator okay so the name 3 times 24
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times 60 is this number 4000 what red red looks fine 320 minutes okay I'm
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going to give the calculator here from here because we are going to end with
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another example, another problem. First, I'm going to take out all of this. Maybe it's
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easier if I do this. Yes. And I'm going to show you another problem. Okay? It's a
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problem about this guy, Charlie. I'm going to put it here. Charlie who needs a new
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swimming costume. She knows her waist is 32 inches. She is probably American. She's
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ordering top-of-the-range streamlined wetsuits from Germany. Who only
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did deal with whole centimetres measurements. What size should
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she order? And we know that one inch is 254 centimetres.
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So what we want to do, basically, in this problem is to change from inches to
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centimetres, to know the appropriate, the right size in centimetres for Charlie.
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Okay, so again it's the same. We start with, we know, 32 inches. Inches are normally
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abbreviated like IN and we want to change that to centimeters. So we write
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the compression factor, okay, what we want to take out we put it below the line,
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centimeters over the line and we use this information one inch is 254
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centimeters again we use the calculator three times two point fifty four is so
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32 times 7.54, 32 times 2.54, now I have it right, that's 81.28.
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But remember, in Germany they only deal in whole centimeters, that means that I wouldn't count in the decimals.
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So the result for this problem is 81 centimeters.
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I hope this was helpful.
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See you next day in class.
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- Idioma/s:
- Autor/es:
- Juan Carlos Fajardo
- Subido por:
- Juan C. F.
- Licencia:
- Reconocimiento - Compartir igual
- Visualizaciones:
- 120
- Fecha:
- 30 de septiembre de 2020 - 19:54
- Visibilidad:
- Público
- Centro:
- IES CLARA CAMPOAMOR
- Duración:
- 05′ 38″
- Relación de aspecto:
- 1.91:1
- Resolución:
- 1024x536 píxeles
- Tamaño:
- 14.46 MBytes
