- Bacteria growth over time (mins)
- Everybody knows the five second rule, while the parameters of this rule will sometimes change for foods that are sticky or foods that are extra delicious it is generally agreed upon. So a logical question to ask would be how quickly would bacteria’s population density need to grow on an object for us not to eat it, unfortunately I do not know how to answer that. Instead I will ask what is the velocity of bacterial density growth at exactly 48 mins?
- Bacteria Population Density (absorbance units) v. Time (mins)
Time (min)
|
Population Density (absorbance)
|
0
|
0.022
|
16
|
0.036
|
32
|
0.060
|
48
|
0.100
|
64
|
0.169
|
80
|
0.169
|
- Point (48,0.100) will be secant to (32,0.060) and (64,0.169)
(48-32)/(0.100-0.060)=16/.04=400
(64-48)/(.169-.100)=16/.069=231.884
(48-0)/(0.100-0.022)=48/.078=615.385
The ARC of these secant lines are all very different from each other, these calculations mean the ARC is not at all constant, and it means that bacteria grew faster between 32 and 48 seconds than it did between 64 and 48 seconds
- (64,.15)
(64-48)/(.15-.10)=16/.05=320
Irc = 320 bacteria density per min
This means that at 48 min bacteria growth velocity is 320, so in terms of my experiment that means there is a gross amount of bacteria growth at 48 mins
- I know that number in part g is the IRC at 48 mins is 320 because it is between the secants of the two closest points on the graph
I like how you showed the calculations and the work on the graph. This shows good understanding of the blog assignment, as well as the material!
ReplyDeleteThe five second rule!! Good intro haha. Definitely caught my attention
ReplyDeletealex,
ReplyDeletethis is a super fun topic for this experiment! based on this, we could probably extend that rule to 10 seconds. ;) your graphs look really good, as does your table, and your calculations are all accurate. i like how you included a secant calculation on the other side of t = 48 minutes to give more room for a solid analysis of why you knew you had the correct IRC.
the only thing you forgot is to include the units for your secant calculations. other than that, great job!
professor little