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Question

A liquid is filled in a spherical container of radius R till a height h. At this positions the liquid surface at the edges is also horizontal. The contact angle is

  1. 0    
  2. c o s to the power of negative 1 end exponent invisible function application open parentheses fraction numerator R minus h over denominator R end fraction close parentheses    
  3. c o s to the power of negative 1 end exponent invisible function application open parentheses fraction numerator h minus R over denominator R end fraction close parentheses    
  4. s i n to the power of negative 1 end exponent invisible function application open parentheses fraction numerator R minus h over denominator R end fraction close parentheses    

The correct answer is: c o s to the power of negative 1 end exponent invisible function application open parentheses fraction numerator R minus h over denominator R end fraction close parentheses

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