Scenario 4 Rihanna has four backup singers, but she has noticed that with her busy schedule, their voices are
wearing out. She sees a commercial for a tea designed for singers and public speakers that guarantees
to soothe the throat and reduce your voice from "cracking" by 50%. She decides to buy the tea and
experiment on her backup singers. She reviewed recordings of her concerts and counted that her
backup singers' voices "cracked" an average of eight times a show. She then asked two of the singers to
take the tea twice a day for a week. She didn't change the routine of the other two singers. After a
week, she noticed that the voices of the two singers who didn't use the tea still "cracked" and average
of eight times, while the two singers who used the tea only experienced this six times,
Indentify the following and explain your decision.
1. What was Rihanna's initial observation?
2. Indentify the Control Group
3. Indentify the Independent Variable
4. Indentify the Dependent Variable
5. What should Rihanna's conclusion be according to the advertisement?

fe 55.85 g/mol and h2o 18.02 g/mol.

most historians agree that gabriel mouton, the vicar of st. paul’s church in lyons, france, is the “founding father” of the metric system. he proposed a decimal system of measurement in 1670. mouton based it on the length of one minute of arc of a great circle of the earth (now called a nautical mile, 1852 meters). he also proposed the swing-length of a pendulum with a frequency of one beat per second as the unit of length (about 25 cm). a pendulum beating with this length would have been fairly easy to produce, thus facilitating the widespread distribution of uniform standards. over the years, his work was revised, improved, and extended by a number of french scientists.

the political sponsor of weights and measures reform in the french revolutionary national assembly was the bishop of autun, better known as talleyrand. under his auspices, the french academy appointed several committees to carry out the work of developing a usable system of weights and measures for france. one of the committees recommended a decimalized measurement system based upon a length equal to one ten-millionth of the length of a quadrant of the earth’s meridian (i.e., one ten-millionth of the distance between the equator and the north pole).

the formula for the conversion of temperature from degree celsius to kelvin is:

the sample of water at is converted to kelvin temperature by using the above formula as:

on comparing the two samples of water at or we can say that at and at respectively. the difference between the temperatures of two samples of water is:

hence, one can say that the sample of water at is greater than the sample of water at by .