You can see all of your stories from apps in your private activity log. To remove an app story from your Timeline and activity log: 1  Click in the top right of Facebook and select Activity Log.
upthrust. 1  a thrust in an upward direction. 2  a sudden and forceful upward movement, as of a nation's economy or the stock market: Market observers are hoping the upthrust can be sustained. 3  Geology. an upheaval. 4  to thrust upward: Frost caused the ground to upthrust.
Note that the object is floating because the upward force of buoyancy is equal to the downward force of gravity. In science, buoyancy (pronunciation: /ËbÉÉª.Énáµsi/ or /ËbuËjÉnáµsi/ ; also known as upthrust) is an upward force exerted by a fluid that opposes the weight of an immersed object.n a situation of fluid statics, the net upward buoyancy force is equal to the magnitude of the weight of fluid displaced by the body.