Great Basin College AMS 320 LAB 9 Objective In this lab we will perform an investigation to determine the half-life of a radioactive isotope Ba-137m. Introduction No other facet of chemistry has captured the attention of people in the latter half of the 1900s as the field of radiation. From the discovery of x-rays in 1900 to the destructive power of atomic weapons, we have seen a history that is very interesting. As discussed in class lecture, some atoms are unstable. Some will change into another element if given enough time.
Bobblehead - Barter | Evergreen Mills: Bazaar, in a dark cave-nook in the corner of the room to the right ofSmiling Jack. Jump over the work bench, it's on the right-most shelves. | | Bobblehead - Big Guns | Fort Constantine: CO Quarters (little bungalow), in the basement. It is in an open safe along with some caps, and the ICBM launchcode. | | Bobblehead - Energy Weapons * | Raven Rock: On the right desk in Colonel Autumn's bedroom: after you pass the huge door from section 2B to 2C, when two Enclave soldiers come out of the right door, take the left door.
Exercise 10: Acid-Base Balance: Activity 1: Hyperventilation Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. The fastest compensatory mechanism for maintaining pH homeostasis in the human body is You correctly answered: c. the chemical buffering system. 2. An increase in hydrogen ion concentration would You correctly answered: d. decrease pH.
(My calculator doesn’t go that far, ha.) Cost of Hard Drive Space per GB: In 1980, the price per GB was roughly $100,000. Today, it would not even cost a dollar. Based on the chart above, the space per unit cost has roughly double every 14 months. ”Several terabyte+ drives have recently broken the $0.10/gigabyte barrier, making the next milestone $0.01/gigabyte, or $10/terabyte.” (Komorowski, 2009) With Moore’s law in effect, I believe we will see a 100 TB hard drive within the next twenty years.
The Pentium chip which is the most common 1993 chip from Intel contained 3,100,000 transistors. The technology behind transistors over the years has changed, they are made smaller so that microprocessors could be fitted with more, which gives faster processors. The co-founder of Intel, Gordon E. Moore in 1965 described how the amount of transistors for integrated circuits which had doubled every year, Moore predicted that for at least the next ten years the trend would continue. Now more than forty five years later this prediction is still somewhat correct. Moore stated that this could continue another decade or two, but would eventually reach its limits at atomic levels of miniaturization.
Answers to Week Two Homework Assignment ( Assignment 1) Chapter 7 Exercise 13 You should choose a sample size of 1000 people. Although the law of averages tells you that the average of 1000 people is very likely to be close to 60 inches -- and thus under 65 inches tall -- here you are winning a prize for each person over 65 inches tall, not when the average of all the people is over 65 inches tall. Having a larger sample will give you more chances at getting the prize. The law of averages pertains to the variability of a sample average -- not variability in individual data values themselves. Here, we are concerned with individual data values.
The Babylonians used π at a value of 25/8 while the Egyptians used it at a value of 256/81. There is little doubt that the biblical calculations came from crude measurements but there is strong support that the Babylonians and Egyptians found π by using mathematical equations. The Greeks first focus on π was around 434 BC when mathematician Anaxagor made an unsuccessful attempt at finding π which he called squaring the circle. It took the Greeks over 100 years of study to find a value for π. In 240 BC, Archimedes of Syracuse concluded his study of π with 223/71<π<22/7.
• Sites also tend to reveal more about the wealthy and literate than the poor, particularly women. • Viewing evidence through modern, western eyes i.e. each room has one purpose – didn’t in Rome. • Concerns in relation to the possible bias in sources Eruption and the Last Agonies of Pompeii and Herculaneum Warning Signs • Vesuvius had apparently been dormant for a very long time • According to Vulcanologists there is a strong link between the magnitude of an eruption and the preceding period of dormancy • It is estimated that the thermal energy released during the AD 79 eruption would have been approximately 100,000 times that of the atomic bomb dropped on Hiroshima in 1945. • The massive Earthquake in AD 62, described by Seneca, indicates that the volcano was returning to life.
The Manhattan Project “Now I am become death, the destroyer of worlds” was what Robert Oppenheimer, one of the makers of the nuclear bomb, said after successfully exploding a bomb (Jinarājadāsa). There are few events that forever change human history such as the invention of fire and the Manhattan Project’s creation is one of these. The Manhattan Project’s atomic bomb was the most influential invention of the 20th century because it forever changed Japan, started a worldwide race for nuclear bombs, and marked the start of a 40 year Cold War with the Soviet Union. There had never been such a powerful weapon that could level cities in seconds and cause such widespread damage over hundreds of miles and it forever altered society. In August
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.