robert,david,jonathan,sara

PRESSURE TESTER: 


 * What data did your group record? Include temperature and pressure values using correct SI units**

hot water: temperature-50 degrees celcius. pressure-from 100 to 117 Kpa. cold water: temperature-2 degrees celcius. pressure-from 113 to 90 Kpa


 * What observations did your group make? What did the bottle look like and feel like?**

In the cold water, the bottle became softer and did not have a lot of pressure. In the hot water, the bottle was more stiff, therefore maintaining a higher pressure level.


 * What conclusions can your group make? Please explain why the bottle did what it did in the two different baths.**

The bottle was more stiff in the warm water, while softer in the cold water. It is softer in the cold water because the molecules are moving at a slower pace, therefore they clumped together. In the hot water, the molecules move faster and spread within the bottle, giving it more pressure, and making the bottle harder.

 THE LEAKY CAN: 

**What data did your group record? Include temperature and relative humidity values using correct SI units**

temp- 5.1 degrees celsius (inside) 24 degrees celsius (outside) humidity around can- 98.6%.


 * What observations did your group make? What did the metal can look like and feel like both before and after?**

BEFORE: The can was smooth, flawless, normal looking, and had tap water within it.

AFTER: The water became steam through the process of evaporation, and the can developed condensation around it. This is because the cold "slow" air reacts with the air on the outside, slowing it down as well, causing it to clump together, and create water droplets, that form on the outside of the can.


 * What conclusions can your group make? Please explain why the metal can did what it did. Please be very descriptive in your explanation**.

The can was colder than the room and the humidity in the air. The water coming from condensation was humidity from the outside of the can. The water on the outside was different than the teal-ish water on the inside because of the steam that was traveling from the boiling water. The colder air slowed the hot air, causing the molecules to clump together, to form little droplets of water.