physics
posted by melisa .
Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 4843 kg), which is made of steel (ρ = 7850 kg/m3). In typical comicbook fashion, they decide to raise the yacht (which is now on the bottom of a lake) by filling it with pingpong balls. A pingpong ball has a mass of 2.70 g and a volume of 3.35ยท105 m3.
a) What is the buoyant force on one pingpong ball in water?
b)b) How many balls are required to float the ship?

physics 
bobpursley
bouyant force one ball= density water*volumeball
YOu decide if the duck's are in fresh water , or sea water. 
physics 
melisa
i found it 0.0335 N with (bouyant force one ball= density water*volumeball) but it 's not truee :(

physics 
melisa
0.0335*9.8 (g) with this its true! thank you bobpursleyy !!!!

physics 
melisa
b) How many balls are required to float the ship? How can i find this. can you help me please bobpursley ??
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