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AP Physics 2 Videos 59 videos

AP Physics 2: 1.5 Systems Interactions and Changes
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AP Physics 2: 1.3 Probability and Systems 170 Views


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Description:

AP Physics 2: 1.3 Probability and Systems. What is the approximate pressure in the near-vacuum of space?

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English Language

Transcript

00:00

Thank you We sneak and here's your shmoop usually brought

00:05

to you by the vacuum of space kind of like

00:08

our brains right through physics smile right you know we're

00:11

talking about All right so his face is mostly empty

00:15

planets stars and clouds of gas or the exception not

00:18

the rule If we average it all density of space

00:21

material is about one molecule her cubic meter with a

00:25

temperature of three point one Kelvin What the approximate pressure

00:29

in the near vacuum of space and here are potential

00:32

answer Well yeah outer space is kind of creepy when

00:40

you think about it It's Just nothing Zip zero zilch

00:43

That which can have a certain appeal whenever your dad

00:45

starts talking about how tough things were back in his

00:48

day Well floating along in space with nothing around for

00:51

light years sounds pretty nice to us Well but we're

00:54

not floating in space So let's take a look at

00:56

the problem A problem like this calls for the ideal

00:59

gas law Well the gas law states that pressure tons

01:03

volume equals the number of molecules times the holtzman constant

01:07

times the temperature in kelvin And we know we need

01:11

to solve for pressure because well that's what problems asking

01:14

for Still we can rearrange the equation solved for key

01:17

and plug in our numbers Number of molecules is one

01:21

and the volume is one cubic meter Ultimas constant is

01:24

one point three eight one times ten to the negative

01:27

Twenty third jules per kilogram I just tripped off tongue

01:31

Does the temperature three point one kelvin and when we

01:34

put it all together we find that the answer is

01:36

four point two seven eight times ten to the negative

01:39

twenty Third it means today is the correct answer Just

01:42

remember space is pretty much the perfect vacuum Gia was 00:01:45.941 --> [endTime] a lot like our stomachs right now Time Four

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