Water Displacement

How to create vacuum 
applying Water Displacement
Physics - in Middle School

i_love_physics

  • Place the food (steak) in a ziploc bag and zip the bag closed with a drinking straw at its corner
  • Put the ziploc bag inside a bucket of cold water and slowly push the bag into the water, keeping the corner together with the straw just above water
  • The water pressure will force the sides of the zigloc bag tightly around the food (steak)
  • After the bag completely immersed in water, pull out the straw quickly and zig the bag closed immediately
  • Vacuum is now created inside the ziploc bag

ziplog_bag_transparent
                       Ziglock Bag

Drinking-Straw20
              Drinking Straw

Photos

zigloc_straw_steak_02
Put steak and butter (2 tsp) in the zigloc bag with the plastic straw inserted in the corner.

zigloc_straw_steak_in_bucket_01
Push the zigloc bag in water

 

 

 

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