The sample size does not matter because this statistical process. Not all atoms change at once but for the most part half of the will eventually change into another element to isotope within the half life time period. The units of half-life are time and can be anything from seconds to millions of years. The uranium isotope U-238 has a half-life of approximately 4.4 billion years. Rodan-222, a radioactive isotope sometimes fund in people’s basements has half-life of then 4 days.
Both of these formulas were found on page 225 in Mathematics in Our World (Bluman, 2005). Problem #37 • This sequence is geometric • Ending balance is $814.45 STEPS/CALCULTATIONS YOU PERFORMED TO REACH THE ANSWER: To find the ending balance, the formula of An = a1(rn-1) will be used. The initial balance is $500, the interest is 5%, and the time span is 10 years. 5% will be listed as 1.05 as the initial balance is 100% plus 5% interest, so 105% is written 1.05. The number of terms is n=10, the first term is a1=525, the common ratio is r = 1.05.
pyridinium hydrobromide perbromide type of stationary phase column length column temperature rate ﬂow of the carrier gas List the 4 general factors that affect the separation obtained on a gas chromatograph What speciﬁc technique is used to collect/isolate your puriﬁed unknown compound at the end of the recrystallization experiment? suction ﬁltration 14 of 22 4/16/12 9:15 PM StudyBlue Flashcard Printing of Lab Final 2211L UGA
We first separated each of the isotopes into their rightful groups and then proceeded to count the amount of pieces for each isotope. We then weighed one of each isotope on a scale to get the mass. In order to find the percentage of abundance we divided the number of particles of the isotope by the number of particles in the sample. To find the average atomic mass of Candium is calculate by multiplying the mass of the isotopes by the percentage of abundance, then adding the products. Data: Isotope | M & M’s | Skittles | Reece’s Pieces | Number of Particles | 35 | 27 | 49 | Mass (g) | 0.85g | 1.03g | 0.74g | Calculations: Percentage of abundance: Reece’s: 49/111= 0.44 x 100= 44% Skittles: 27/111= 0.243 x 100= 24.3% M & M’s: 35/111= 0.31 x 100= 31% Average Atomic mass: (44 x 0.74g) + (24.3 x 1.03g) + (31 x 0.85g)= 83.94g Conclusion: Candium had three isotopes, Reece’s Pieces, Skittles, and M & M’s.
ACCT 550 Week 7 Homework Chapter 11: E11-4, E11-9, E11-11, E11-17 E11-4 (Depreciation Computations—Five Methods) Wenner Furnace Corp. purchased machinery for $279,000 on May 1, 2012. It is estimated that it will have a useful life of 10 years, salvage value of $15,000, production of 240,000 units, and working hours of 25,000. During 2013, Wenner Corp. uses the machinery for 2,650 hours, and the machinery produces 25,500 units. Instructions From the information given, compute the depreciation charge for 2013 under each of the following methods. (Round to the nearest dollar.)
Moore stated that this could continue another decade or two, but would eventually reach its limits at atomic levels of miniaturization. GENERATIONS OF INTEGRATED CHIPS * 1st-(SSI) Small Scale Integration- transistors were 3-30 per chip/ Early 1960’s * 2nd-(MSI) Medium Scale Integration- transistors were 30-300 per chip/ late 1960’s * 3rd-(LSI)Large Scale Integration- transistors were 300-3,000 per chip/ mid 1970’s * 4th-(VLSI)Very Large Scale Integration- transistors were 3,000 or more per chip/ early 1970’s * 5th-(ULSI)Ultra Large Scale Integration- transistors were 1,000,000 or more per chip/ mid
In 2013 AD, CO2 in the atmosphere is 396 ppm. 1. What was the percent of atmospheric CO2 in 1850? Move the decimal place 4 digits to the left to get percent (%) 2. Hopefully you will live until the end of this century - 2100; what will be the amount of CO2 in the atmosphere in 2100 assuming there is no change in the emissions rate of 2 ppm/year?
Describe two recent discoveries of transuranic elements explaining how they were produced. Firstly what is a transuranic element? Transuranic elements are elements with an atomic number above that of uranium with atomic number Z= 92. All transuranic elements are radioactive. The process of changing one element into another is called transmutation.
garhi show cut marks made by a stone tool; both the hominid and antelope fossils are dated at 2.5 million years old. 10. What is the difference between H. habilis and H. erectus? Homo erectus, unlike H. habilis and all of the Australopithecus species, ranged far beyond Africa. Some scientists have split H. erectus into three separate species, based on the geographic region in which specimens have been found: H. ergaster (Africa), H. erectus (Asia), and H. heidelbergensis (Europe).
Scholars are bristling at attempts to link the ancient Maya with trends in contemporary spirituality. Maya civilization, known for advanced writing, mathematics and astronomy, flourished for centuries in Mesoamerica, especially between A.D. 300 and 900. Its Long Count calendar, which was discontinued under Spanish colonization, tracks more than 5,000 years, then resets at year zero. The calendar stops on the date December 21, 2012. On the winter solstice in 2012, the sun will be aligned with the center of the Milky Way for the first time in about 26,000 years.