Hola.

Diana Reyes
Anthony Robinson
Daniel Vargas

Buoyancy

Problem: How is the bouyant force acting on a floating object related to the weight of the water it displaces?

Hypothesis: It’s the sameObjective: Determine how the buoyant force acts on an object according to the weight of the water it displaces.

Materials:
* Paper towels
* Table salt
* Beaker (600 ml)
* Triple-beam balance* Pie pan
* Jar with watertight lid (30 ml)

Procedure:
1. Find the mass (grams) of a dry paper towel and the pie pan together. Multiply it by 0.01. This gives you the weight in newtons. Recordit in the data table.
2. Place the 600ml beaker, with the dry paper towel under it, in the middle of the pie pan. Fill the beaker to the very top with water.
3. Fill the jar about halfway withsalt. Then find the mass of the dry jar (grams). Multiply it by 0.01. Record on the data table.
4. Gently lower the jar into the beaker. Repeat steps 1, 2, and 3. Estimate the fraction of the jarthat is underwater and record it.
5. Once all the displaced water has been spilled, find the total mass of the paper towel and pie pan. Multiply by 0.01 and record it.
6. Empty the pie pan anddry off the pan and the jar.
7. Repeat steps 2 though 6 several more times. Each time fill with different amount of salt, but make sure it still floats.
8. Calculate the buoyant force for eachtrial and record it.
9. Calculate the weight of the displaced water on each case and record it.

Data:
Jar | Weight of empty pan and paper towel | Weight of jar, salt, and cover | Weight of pie panwith displaced water and paper towel | Fraction of jar submerged in water | Bouyant force | Weight of displaced water |
1 | 0.896 N | 0.1 N | 0.001 N | 1% | 0.105 N | 0.105 N |
2 | 1.001 N | 0.163 N| 1.237 N | 3% | 0.228 N | 0.228 N |
3 | 1.237 N | 0.226 N | 1.436 N | 5% | 0.199 N | 0.199 N |
4 | 1.436 N | 0.308 N | 1.868 N | 7% | 0.432 N | 0.432 N |
5 | 1.868 N | 0.383 N | 2.383 N | 10% |...