20 ELEMENTARY GENERAL SCIENCE CH. i 



liquid. What name do we give to the property which prevents 

 liquids from being perfectly fluid and what do you know about it ? 



13. Describe experiments in support of the assertion that liquids 

 communicate pressure equally in all directions. 



14. What is meant by the "hydrostatic paradox"? Describe 

 some useful apparatus in which this principle is utilised. 



15. How would you show by experiment that the weight of the 

 same portion of matter in different states is constant. 



16. On what grounds is the assertion that "Matter is inde- 

 structible " based ? 



