Exercise No. 1.1
NAME: MORENO, KATHERINE LEIGH M.
COURSE, YR. & SECTION: BSCHEM-3A
A.
What are the natural patterns? Give examples (picture) for each.
The permaculture principle of observing and replicating patterns in
nature can become a fascinating study-and a life-long one. Here is a
short outline of the primary patterns that occur in nature.
B.
Using the Population Growth and Decay formula compute the following:
1. Suppose that the population of a certain country grows at an annual rate of 2%. If
the current population is 3 million, what will the population be in 10 years?
Ans.
2. During a biology experiment, a certain culture of cells has a constant relative growth
rate of 0.04/minute. If there are 5,000 cells at the beginning of the experiment, how
large will the culture be one hour later?
Ans.
3. At the start of an experiment, there are 100 bacteria. If the bacteria follow an
exponential growth pattern with rate 2%, what will be the population after 5 hours?
How long will it take for the population to double?
Ans.
4. Suppose that a certain radioactive element has an annual decay rate of 10%. Starting
with a 200-gram sample of the element, how many grams will be left in 3 years?
Ans.
5. Using the same element as in Example 4, if a particular sample of the element decays
to 50 grams after 5 years, how big was the original sample?