# AP Physics 2: 1.3 Probability and Systems

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

AP Physics 2 | Probability and Systems |

Language | English Language |

Science Practice 6 | Working with scientific explanations and theories |

### Transcript

the rule If we average it all density of space

material is about one molecule her cubic meter with a

temperature of three point one Kelvin What the approximate pressure

in the near vacuum of space and here are potential

answer Well yeah outer space is kind of creepy when

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

That which can have a certain appeal whenever your dad

starts talking about how tough things were back in his

day Well floating along in space with nothing around for

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

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

the problem A problem like this calls for the ideal

gas law Well the gas law states that pressure tons

volume equals the number of molecules times the holtzman constant

times the temperature in kelvin And we know we need

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

for Still we can rearrange the equation solved for key

and plug in our numbers Number of molecules is one

and the volume is one cubic meter Ultimas constant is

one point three eight one times ten to the negative

Twenty third jules per kilogram I just tripped off tongue

Does the temperature three point one kelvin and when we

put it all together we find that the answer is

four point two seven eight times ten to the negative

twenty Third it means today is the correct answer Just

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