Which noble gas is used in filling ballons for meterlogical observatins??

The balloon is usually filled with hydrogen due to lower cost, though helium can also be used.

The no of words that can be formed using the...

Kepler's second law is based on?

If r,s,t are prime numbers and p,q are the p...

Please provide stepwise solution to this pro...

What is the maximum and minimum value of Cos...

Please Answer 39.

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what is difference between star rating in ov...

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If a hydrogen atom is supplied with 15.8 eV ...