Purpose: Define the effect of air dense to pressure.
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.