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Question Number 23130 by Tinkutara last updated on 26/Oct/17

$$\mathrm{A}\mathrm{baloon}\mathrm{filled}\mathrm{with}\mathrm{helium}\mathrm{rises}\mathrm{against}$$$$\mathrm{gravity}\mathrm{increasing}\mathrm{its}\mathrm{potential}\mathrm{energy}.$$$$\mathrm{The}\mathrm{speed}\mathrm{of}\mathrm{the}\mathrm{baloon}\mathrm{also}\mathrm{increases}$$$$\mathrm{as}\mathrm{it}\mathrm{rises}.\mathrm{How}\mathrm{do}\mathrm{you}\mathrm{reconcile}\mathrm{this}$$$$\mathrm{with}\mathrm{the}\mathrm{law}\mathrm{of}\mathrm{conservation}\mathrm{of}$$$$\mathrm{mechanical}\mathrm{energy}?\mathrm{You}\mathrm{can}\mathrm{neglect}$$$$\mathrm{viscous}\mathrm{drag}\mathrm{of}\mathrm{air}\mathrm{and}\mathrm{assume}\mathrm{that}$$$$\mathrm{density}\mathrm{of}\mathrm{air}\mathrm{is}\mathrm{constant}.$$

Commented by ajfour last updated on 26/Oct/17

$$Internalenergyofconfined$$$$heliuminbaloondecreases..$$

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