Sunday, November 4, 2012

Blog Week 8

On Monday we learned that there is a direct relationship between pressure and the number of particles. As the number of particles increase so does the pressure, which means there's a direct relationship. So if there are no particles, there's no pressure. The equation is P=(p/n)n. We also learned that temperature and pressure have a directly proportional relationship. If the temperature was 0° celsius, particles are still moving. If there's zero kPa particles are not moving because particles moving create pressure. So, if there's no pressure then there are no particles moving. We then discussed the the question: At which temperature would particles stop moving? We found out that the real zero for celsius degrees is -273.15 and that's when matter stops moving. On Tuesday we said the celsius is relative to water and kelvin is the absolute scale. Next we realized how to convert celsius to kelvin. First we did some practice with out the equation. Here are some examples: -273.15°C = 0°K, -71.15°C = 200°K, 0°C = 273.15°K, and 100°C = 373.15°K. So, the rule for celsius to kelvin is °C + 273.15 = K and the for kelvin to celsius is K - 273.15 = °C. We also learned the rough calculation of celsius to fahrenheit, which is 2x°C + 32 = °F. We also found out 0°C goes to 32°F. Next we learned that volume and temperature are directly related. So we have these rules so far: P  1/v, P  n, P  T, V  T. We also learned that if there's a different temperature, there's a different pressure, and there's a different molecule movements. There's always pressure in the air. On Wednesday, we did an experiment on glow sticks. When we put the a glow stick in hot water, air temperature water and cold water, they all reacted differently. In the hot water the glow sticks glowed brighter than in the normal water and in the cold water the glow sticks lost their glow. We also learned how to preserve glow sticks, to preserve them you put them in the freezer. This works because it slows down the particles and when you put it in the hot water it makes the particles move faster and the glow sticks become brighter. On Thursday, we learned what a barometer is, it measures atmospheric pressure. We learned that the atmospheric pressure was measured with mercury. It was put in a bowl and in a tube and the tube was put in the bowl. As pressure in the air increased the mecury from the bowl gets pushed in the tube and however high it is in the the tube, thats the pressure. There are 4 units that the pressure can be measured in like mmHg = mm of Mercury, bars = mm of mercury, torr = mm of mercury, psi = pounds per square inch. On Friday, we did a survey and we did some things for our E-mail. Then we worked on the assessment with our groups. My group didn't finish the whole thing, so I hope we get some more time.

No comments:

Post a Comment