Q:
      
      
         
            
A balloon filled with hydrogen will
         
       
      
      
      
          
      
      
          Answer & Explanation
         Answer: B) reach a particular height and remain floating          
         
Explanation: It will stop at a height where the weight of the balloon with contents is equal to the weight of air displaced by it, i.e , when the upthrust is equal to the downthrust. The question of bursting will depend on how much difference of pressure inside and outside , the material of the balloon can withstand. It is assumed the balloon is filled with a lighter than air gas like hydrogen or helium.
       
      
      
      
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