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AP Physics 2 Videos 66 videos
AP Physics 2: 1.1 Properties of Objects and Systems. What is the magnitude and direction of the conventional current in this wire?
AP Physics 2: 1.5 Properties of Objects and Systems. According to the Bohr's model of the atom, which of the following are true?
AP Physics 2: 1.3 Probability and Systems 170 Views
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AP Physics 2: 1.3 Probability and Systems. What is the approximate pressure in the near-vacuum of space?
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
Full Transcript
- 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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