Machine Design
Three different weights fall from a certain height under vacuum. They will take

None of these
Times inversely proportional to weight to reach earth
Times proportional to weight to reach earth
Same time to reach earth

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Machine Design
In hydrostatic bearings

Do not require external supply of lubricant
The Oil film pressure is generated only by the rotation of the journal
The oil film is maintained by supplying oil under pressure
Grease is used for lubrication

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