Activity 1

It's the only time I really understood why we need the concept of significant figures. For example the value 2.3 is very differrent from the value 2.30 because 2.3 means not 2.2 and not 2.1. On the other hand 2.30 means that its not 2.29 and not 2.31. Uncertainty is always present when measurements are done based on the accuracy of the measuring tool that is why significant figures are really important. Another thing I only fully understood from this lesson is to how to find the significant figures of multiple operations. The part where we approximate the order of magnitude of the number of hair in the human person is the one  I really enjoyed. Fermi questions.... that's new to my ears and it sounds amazing especially when I heard that some people make it their hobby to approximate the magnitude of amount that are impossible to count. Another new thing is about the second order of approximation or the best estimate. Now I knew why trials are important to values that are changing and how to get the best estimate using the values from the trials. When the trials have values that are far from each other maybe you are doing somrthing wrong. That is why I also learned the technique to know whether you are doing the right thing in the experiment. Not like when I was in high scholol, we usually disregard the importance of trials and just give the value of the 2nd and other trials equal to the value of the 1st trial even though they were not exactly equal.