physics
posted by maria .
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.
How many balls are required to float the ship?

The amount of mass that each ball will lift is (in grams)
Pwater*V  Mball
= 1.00 g/cm^3)*3.35*10^1 cm^3  2.70
= 30.8 g
The number of pingpong balls needed is 4843*10^3g/30.8 = 157,200
The density of steel does not matter. The answer depends upon the total mass that must be lifted.
Respond to this Question
Similar Questions

math
two look out situations, which are 25 miles apart along the coast on a northsouth shoreline, spot an approaching yacht. One lookout station measures the direction to the yacht at N33 degrees E, and the other station measures the direction … 
trigonometry
2. two look out situations, which are 25 miles apart along the coast on a northsouth shoreline, spot an approaching yacht. One lookout station measures the direction to the yacht at N33 degrees E, and the other station measures the … 
Math Trig
A coast guard patrol boat is 14.8 km east of the Brier Island Lighthouse. A disabled yacht is 7.5km south of the lighthouse. a) How far is the patrol boat from the yacht, to the nearest tenth of a kilometer? 
physics
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 … 
physics
Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 3527 kg), which is made of steel (ρ = 7850 kg/m^3). In typical comicbook fashion, they decide to raise the yacht (which is now on the bottom of a lake) by … 
math
.Three people decide to share the cost of a yacht, By bringing in an additional partner they can reduce the cost to each person by $4000 .What is the total cost of the yacht? 
math
Two lookout stations, which are 25 miles apart along the coast on a northsouth line, spot an approaching yacht. One lookout station measures the direction to the yacht at N 33degrees E, and the other station measures the direction … 
algebra
Three people decide to share the cost of a yacht. By bringing in an additional partner, they can reduce the cost to each person by $4000. What is the total cost of the yacht? 
maths
a yacht is moving at 10km/h in a south easterly direction and encounters a 3km/h current from the north. find the actual speed and direction of the yacht 
Trig application
I am having trouble with this question. A privately owned yacht leaves a dock in Myrtke Beach, South Carolina, and heads toward Freeport in the Bahamas at a bearing of S 1.4 degrees E. The yacht averages a speed of 20 knots over the …