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Captions List
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End
Caption
00:00:09.000
this is NASA space Power facility near Cleveland Ohio and
00:00:12.300
it is in the world's biggest vacuum chamber and she
00:00:14.600
used to test spacecraft in the conditions that I have
00:00:19.000
to space and that bike pump tonight with the 32
00:00:23.900
in this chamber until they're about to grams left
00:00:33.100
Century Construction Wichita history with Bill in the 1960s as
00:00:40.800
a nuclear test facility and they built around minion tonight
00:00:44.600
the radiation easy to deal with aluminium is not the
00:00:48.000
best thing the strongest material to build a vacuum chamber
00:00:54.800
so I'm to concrete skin radiation shielding and parts an
00:00:59.300
external pressure vessel so this thing can take the force
00:01:03.700
is present on the outside tent to the conditions that
00:01:04.300
I need to space
00:01:17.100
Galileo's experiment with simple he took a heavy object and
00:01:19.700
a light one and drop them at the same time
00:01:21.800
to see which fell fastest
00:01:39.500
in this case the feathers fell to the ground at
00:01:42.300
a slower rate than the bowling Bowl because of air
00:01:51.900
in order to see the true nature of Rapid City
00:01:54.100
we have to remove the ad
00:02:16.700
it takes 3 hours to pump at the 800000 cubic
00:02:22.500
feet in the chamber in the last 30 minutes but
00:02:25.900
once it's complete as a near-perfect if I came inside
00:02:33.900
6104 manual 10% open station 104 drop PCV 30-1 pressure
00:02:37.400
set point at 240 PSI we are go for drop
00:02:51.900
hi 8 7 6 5 4 3 2 1 release
00:03:26.200
they came down exactly
00:03:34.700
exactly exactly
00:03:48.900
Isaac Newton would say that the ball in the feather
00:03:53.200
fall because there's a force pulling them down gravity
00:03:57.200
what time Stein imagine the same very differently
00:04:03.500
happiest thoughts of his life was this the reason the
00:04:10.400
bowling ball feather fall together is because they know when
00:04:15.200
standing still there is no force acting on them so
00:04:23.900
the reason that I couldn't see the background that be
00:04:26.600
no way of knowing that the ball of the feathers
00:04:28.800
would being accelerated tools of the Earth
00:04:34.400
so you can clean it they went

Episode 4 Preview - BBC Two
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