Variables: Independent Variables: Milliliters of air Dependent Variables: Pressure Controlled Variables: Milliliters of air, room temperature, same syringe. Materials: Syringe, pressure senser. Procedure: On the paper Data: ml ±0. 5Room Temperaturekpa1 ±0. 01kpa2 ±0. 01kpa3 ±0. 01kpa4 ±0. 01kpa5 ±0. 01Averages kpa ±0. 05 2024. 6? 102. 840 102. 950 102. 780 102. 780 102. 940 102. 858 1924. 6? 108. 810 108. 550 108. 470 108. 470 109. 140 108. 688 1824. 6? 114. 580 114. 130 114.
430 114. 110 114. 900 114. 430 1724. 6? 121. 320 120. 830 121. 310 120. 560 121. 310 121. 066 1624. 6? 128. 010 128. 150 128. 440 128. 320 128. 520 128. 288 1524. 6? 136. 750 136. 130 137. 820 136. 750 137. 240 136. 938 1424. 6? 146. 250 145. 780 146. 750 145. 230 146. 260 146. 054 1324. 6? 156. 790 156. 750 157. 040 156. 310 157. 030 156. 784 1224. 6? 167. 350 169. 280 168. 650 169. 640 169. 410 168. 866 1124. 6? 184. 870 184. 030 182. 390 183. 640 184. 410 183. 868 1024. 6? 202.
300 200. 000 200. 040 199. 820 201. 020 200. 636 Not a linear function, so I will inverse the X axis values to make it into a linear function. Conclusion: Looking at the graph above, we can tell there is a linear increase, which is the inverse value of volume increase the pressure increase which also means that when the volume decrease, the pressure decrease. Looking at the square of R value which is 0. 9998, this number showed that the data I collected was both accurate and precise.
Evaluation: Throughout the whole experiment, the quality was pretty good. Because of using the digital lab quest device, the data I am able to collect was pretty accurate and precise throughout the whole experiment. To improve, I think is to change a better syringe or find out a way to let the syringe to stay constant because while using the syringe, our hands might give it a little bit pressure which could affect the final result.