Week 14: Force
Questions The questions that we worked on investigating this week are: How can a particle model help to explain - Why the plunger is hard to pull up when suctioned? - Why does ice melt faster on metal than on wood? - Why do cold drinks get water droplets on the outside? Plunger Experiment Today we spent part of lab investigating why the plunger is hard to pull up when it is suctioned to the table. The reason is that there is 14.7 psi pushing down on the plunger at all times. When the plunger is not suctioned, there is 14.7 psi also pushing up inside the plunger so it cancels each other out. When the plunger is suctioned, there is still 14.7 psi pushing down on the plunger, but now there is less than 14.7 psi pushing up inside the plunger, which is why it is hard to pull it up, you would need enough force to cancel out 14.7psi. Model we created to explain this Condensation on Can Experiment Water particles in the air are a higher temperature than ...