Cobalt My report is about the element Cobalt. Cobalt is the 27th element on the periodical table and has an atomic number of twenty-seven. It has a symbol of Co. Cobalt¹s atomic weight is 58.9332. It has a melting point of 1‚490 C. and a boiling point of 2‚900 C. Cobalt looks almost exactly like iron and nickel. Cobalt is between iron and nickel on the periodical table and found in only . 001-.002 percent of the earth¹s crust. Cobalt was first found in the Harz Mountains. People in
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Introduction Different parts of the world have their own cultures‚ and in these cultures there are certain “cultural norms”. Many people decide they would like to go out of a familiar area to study what these “cultural norms” are‚ but the hardest cultural norms to identify‚ are the ones in one’s own culture. For this experiment‚ I decided to sit at a sports bar and see how different groups of people would react to being at a restaurant with multiple NFL games on different televisions. I predicted
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Guess Paper – 2009 Class – X Subject – Chemistry (P- Block Elements) Kalra sir 09460472649 kalra1977@rediffmail.com Group 15 elements: |Symbol |Atomic |Electronic configuration | | |number | | | |7 |[He]2s22p3 | |N | | | |P |15 |[Ne] 3s23p3 | |As |33 |[Ar]3d104s24p3
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small plastic bag to the spring scale. 2. Add washers to the plastic bag until the scale measures approximately 25 g total. The filled bag will hereafter be referred to as the bob. Record this value as “Mass of bob” in the place provided in Data Table 1. Table 1: Trial of values at varying degrees Length of string: 100cm= 1 m Mass of bob: 25g= 0.025kg Placement of Bob Degrees Amplitude (bob horizontal displacement) cm Trial 1 (s) 5 cycles Trial 2 (s) 5 cycles Trial 3 (s) 5 cycles Avg. Time (s)
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SEMRA ÖZAL THE HISTORY OF LOGARITHMS John Napier is a Scottish mathematician who lived from 1550 to 1617. He worked more than twenty years to improve his theory and tables of what he called logarithms. Napier called the theory logarithms‚ because he thought of them as “reckoning numbers”‚ namely to calculate an amount(Caulfield 2010). “The word he derived from two Greek roots: logos meaning word‚ or study‚ or reasoning‚ or in Napier’s use “reckoning”
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History of Table Tennis February 10‚ 2009 Table tennis‚ also known as ping pong‚ is a sport in which two or four players hit a lightweight‚ hollow ball back and forth with rackets (also known as ’bats’ or ’paddles’). The game takes place on a hard table divided by a net. Players must allow a ball played toward them only one bounce on their side of the table and must return it so that it bounces on the opposite side. Points are scored when a player fails to return the ball within the rules. Play
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Chapter:-8 The d-and f-Block Elements POINTS TO BE REMEMBERED: --- The elements of periodic table belonging to group 3 to 12 are known as d-Block elements. The general electronic configuration of these elements is (n -1)d1-10 ns 1-2 d- Block elements are collectively known as Transition Elements because properties of these elements vary in between s-Block and p-Block elements. A transition element should have partially filled (n-1) d orbital. Group 12 elements i.e. Zn
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Table Tennis Table Tennis The Table Tennis sport got its start near the end of the 19th century in England. After dinner one night‚ some Victorians decided to turn their dinning room table into a miniature version of lawn tennis. They lines up books as a net‚ used lids from empty cigar boxes as rackets‚ and the ball was made from string (table tennis balls were also made from champagne corks or rubber). Started as an after dinner activity‚ over the years‚ table tennis would turn into a sport
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them contains 1 formula unit in its unit cell‚ whileα- FePO4 has a trigonal unit cell andβ- FePO4 has a hexagonal unit cell. Table below shows the lattice parameters ‘s correspondence with temperature. Group B: Model Answer 3 About symmetrical difference‚ the symmetry of α- FePO4 is trigonal while the symmetry ofβ- FePO4 is hexagonal as shown above. From the above table‚ we can see that as the temperature increases (below 980K)‚ the changing in the crystals is shown below. The cell parameter
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beverage with the food. When the kitchen and the bar orders are both ready‚ a waiter will take them to the room and bill the guest. There are six waiters to provide the service and each order takes 20 minutes for the waiter to complete. The following table shows the position of different order at different times: Order no Time to get the order ready(min) 16 32 32 48 48 64 64 1‚2‚3‚4 5‚6 7‚8 9‚10 11‚12 13‚14 15‚16 Time when order is given to waitor (min) 16 32 36 48 52 64 68 Time when the order reaches
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