Brian Cox visits the world’s biggest vacuum | Human Universe – BBC

That is Nasa’s area power facility near Cleveland, Ohio, and it’s the world’s largest vacuum chamber it’s used to test spacecraft in the conditions of outer space and It does that by means of pumping out the 30 plenty of air on this chamber except they’re about 2 grams left This I’ve received an eccentric development. Which is a component of this history it was once developed in the 1960s as a nuclear experiment facility to scan nuclear Propulsion methods and That meant that they constructed it out of our [mininum] to make the radiation easier to deal with aluminium isn’t the exceptional factor the strongest fabric to build a vacuum chamber out of in order that they built out a Concrete skin which is a component radiation shielding and part an external strain vessel so this thing can take The force that’s reward on the outside when it is pumped out to the conditions of outer area Galileo’s test used to be easy he took a heavy [object] and the light one And drop them while to look which fell quickest Now on this case the feathers fell to the bottom at a slower expense [than] the bowling ball when you consider that of air resistance So to be able to see the actual nature of gravity we have to eliminate the air It takes three hours to pump out the 800 thousand cubic toes of air from the chamber We drop to millet or within the final 30 minutes, but once it can be whole.There may be a close-best vacuum inside 6104 manual 10 percentage [orbit] Station One go for [Drive] PCB 30-1 stress set factor at 240 PSI. We’re go for drop and nine eight seven six five 4 cameras on two one release Yeah, appear at that. They got here down precisely this precisely, not gonna silent precisely just a feathers. Do not move nothing look at that. That’s simply wonderful Isaac Newton would say that the ball and the feather fall when you consider that there’s a drive pulling them down gravity What einstein imagined the scene very another way? The happiest concept of his lifestyles was this: the motive the bowling ball feather fall collectively is due to the fact that they are not… …Falling they’re standing nonetheless there is no force appearing on them in any respect He reasoned that if you happen to could not see the again gravity There’d be no approach of realizing that the ball and the feathers have been being accelerated toward the Earth So he concluded: They weren’t

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