T Ind for the balloon TB=-(Helium -Pair)VB(v29)=V2N Ip -mac R eg The plumb and balloon strings will form an angle of o= 45 with the vertical ge∫=2g B References 1 W.H. Hollister, Unified Engineering Notes, Course 93-94and for the balloon TB = −(ρhelium − ρair)VB( √ 2g) = √ 2 N. The plumb and balloon strings will form an angle of φ = 45o with the vertical. References [1] W.H. Hollister, Unified Engineering Notes, Course 93-94. 6