In Figure 2, the lower meniscus lies below the 3 mL line and 4 minor gradations that signify 0.1 values. Estimating the uncertain digit to be 0.04 mL, the reading we record for this particular buret is 3.44 mL.
3.) Starting with 20g of weight attached to the string on the motor (as seen above) perform 3 experiments with each weight group (20g, 40g, 60g, 80g) and record their voltage, time and current.
There are several sources of error to this experiment due to random and systematic errors. The only source of random error was the measurement that we took through the graduated cylinder which was only accurate to the nearest 1%. We took the largest error from this one percent, which was +/- 3. The largest relative error this yielded was only 3%, so this did not affect how precise this experiment was too much. We can still make this more precise by making the masses of the water larger. For example if we started the masses at 300mL and went up by 50mL, the largest error this would yield would be 2% due to the largest error being +/- 5. This would cause smaller errors in the amount of water.
4.Measure 35mL of warm water and add them into each of the 4 test tubes at about roughly the same time. It is essential that the water is warm. Do not seal the test tube.
Therefore, a theoretical uncertainty value that accommodates both uncertainties of the measurement and the equipment is calculated. The theoretical uncertainty calculation is primarily based on the propagation of error formula. The theoretical uncertainty calculation is as follows.
The class did very well in terms of the accuracy and precision of class A pipettes. The tolerance for class A pipettes is ±.006 for 1mL, ±.01 for 5 mL, and ± .02 for 10 mL (. As a whole the class did rather well in terms of the expected accuracy and precision of the class A glassware. I found the expected values from a website. The student who had the best calibration was student number 1. There recorded values were within the closest range of each pipette. I believe that my data is not within the best simply because, one; my one mL pipette was not delivering the entire amount of water, two; I was pretty relaxed in my measurements, I will be honest and say that I did not ensure that each draw was perfect, in which I did not check at eye level if the bottom of the meniscus was exactly on the line. So in order to be more accurate, I could make sure and try to make perfect draws every time.
At the end of each time i wrapped the nail with the loops I left some wire so that I was able to hook it up to the battery. The wire that was left out, I folded it so it could be able to hold on to the battery, positive and negative. The positive was the flat head of the nail and the negative was the pointy bottom of the nail. The type of battery that i used was a D battery. By putting the nail wrap with copper wire into the battery it started creating magnetism.
If your chip has the indentation, hold it so that the indentation is up. The upper left corner is called pin 1. Counting down the left side will be pins 1, 2, 3, and 4. Go back up the right side, starting with the lower right corner. The pins on that side are 5, 6, 7, and 8. Pin 1 is opposite 8, 2 is opposite 7, 3 is opposite 6, and 4 is opposite 5. Knowing which pin is which is critical to making your circuit work.