MCQ
The temperature at which the surface tension of water is zero
- A$0^°\,C$
- BSlightly less than $647 \,K$
- C$370^°C$
- ✓Both (b) and (c)
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Suppose the disk makes n number of revolutions to attain an angular speed of $50\, rad s ^{-1} .$ The value of $n$, to the nearest integer, is.......... [Given : In one complete revolution, the disk rotates by $6.28\, rad$ ]

