Fluid Technology

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Across
  1. 2. a device for controlling the passage of fluid through a pipe or duct
  2. 4. is a physical system which doesn't exchange any matter with its surroundings, and isn't subject to any force whose source is external to the system
  3. 6. the continuous physical force exerted on or against an object by something in contact with it.
Down
  1. 1. a substance that has no fixed shape and yields easily to external pressure
  2. 2. the amount of space that a substance or object occupies
  3. 3. type of motor that is responsible for moving or controlling a mechanism or system
  4. 4. a solid geometric figure with straight parallel sides and a circular or oval section.
  5. 5. strength or energy as an attribute of physical action or movement
  6. 6. a disk or short cylinder fitting closely within a tube in which it moves up and down against a liquid or gas