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### 222-S07-2

Course: PHYS 222, Fall 2008
School: Bridgewater College
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Word Count: 384

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PHYS Name: 221 General Physics I Second Exam Spring 2007 Note: Show your work. Correct answers by themselves are not sufficient. Also, watch the significant digits in each problem. 1. The speed of the protons in the solar wind at the Earths orbit averages about 450 km/s. What is the effective temperature of this solar wind component? [This is true even though there are only about 6 protons/cm3 in the solar wind.]...

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PHYS Name: 221 General Physics I Second Exam Spring 2007 Note: Show your work. Correct answers by themselves are not sufficient. Also, watch the significant digits in each problem. 1. The speed of the protons in the solar wind at the Earths orbit averages about 450 km/s. What is the effective temperature of this solar wind component? [This is true even though there are only about 6 protons/cm3 in the solar wind.] 2. A heat engine operates by absorbing 3.45 X 104 J of heat from a hot reservoir and exhausting 2.25 X 104 J of heat to a cold reservoir during each cycle. How much work is done in each cycle, and what is the efficiency of the engine? 2 Name: 3. A uniform electric field is parallel to the x-axis. In what direction can a charge be displaced in this field without any external work being done on the charge? [Explain briefly.] 4. (a) What is the equivalent capacitance of the circuit at right? (b) What is the charge on each of the capacitors? (Note: E = 9.0 V, C1 = 2.0 F, C2 = 3.0 F, and C3 = 3.0 F.) 3 Name: 5. A 1250-W hair dryer is connected to 120-V a receptacle. What is the resistance of the filament of the hair dryer and current flowing through it? [Assume 3 significant digits.] 6. If a 2.45-kg mass of aluminum is heated to 190.o C is dropped into a large freshwater lake at 19.5o C, what is the change in entropy of the lake? Assume no heat was lost to the air or the earth around the lake. 4 Name: 7. A -3.5-C charge is located at -2.50 cm on the x-axis while a 2.7-C charge is located at 1.85 cm on the y-axis. (a) What is the magnitude and direction of the electric field at the origin due to these two charges? (b) What is the electric potential at the origin? 5 Name: ...

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Bridgewater College - PHYS - 222
Name: PHYS 222 General Physics II Third Exam Spring 2007 Note: Show your work. Correct answers by themselves are not sufficient. Also, watch the significant digits in each problem. 1. Find the direction of the current in the resistor in the diagram (
Bridgewater College - PHYS - 222
Name: PHYS 221 General Physics I Final Exam Spring 2007 Note: Show your work. Correct answers by themselves are not sufficient. Also, watch the significant digits in each problem. 1. A sample of an ideal gas at a pressure of 3.00 X 105 Pa expands iso
Bridgewater College - CHEM - 162
CHEM 162Calorimetry Worksheet1. A hot, 80.0-g iron spoon (T=95.0 C) is placed in a coffee cup containing 100.0 g of water at 20 C. After the spoon and the water reach thermal equilibrium, what is the temperature of the water? Use the following in
Bridgewater College - CHEM - 162
CHEM 1621. NH4+ (aq) + NO2- (aq) N2 (g) + 2 H2O (l)Initial RatesRate =Initial [NH4+] (M) 0.0500 0.100 0.200 Initial [NO2-] (M) 0.0050 0.010 0.010 Inital Rate (M s-1) 6.7510-8 2.7010-7 5.4010-7Rate Law:Exp. # 1 2 32.Rate Law:NO2 (g) + C
Bridgewater College - CHEM - 162
CHEM 162Integrated Rate Law Equations1. Sulfuryl chloride (SO2Cl2) in the gas phase decomposes to sulfur dioxide and chlorine gas. The following kinetics data were obtained by heating a container containing about 5 atm of the gas to 600 K. Time (
Bridgewater College - CHEM - 162
CHEM 162MechanismsNO2 (g) + CO (g) NO (g) + CO2 (g)Propose two mechanisms for the following reaction:Mechanism 1:Rate Law:CHEM 162 - S2004 Dr. OverwayRate =Page 1 of 3 mechanisms.doc General Chemistry II www.bridgewater.edu/~koverwayC
Bridgewater College - CHEM - 162
CHEM 162Equilibrium ExpressionsYou will need to memorize the general forms of each of the following equilibrium expressions. The specific examples that are given do not need to be memorized. 1. Solubility product General form: Specific example: M
Bridgewater College - CHEM - 162
CHEM 162Acid/Base Calculations1. What is the pH of the solution when 150 mL of 0.20 M HNO3 is mixed with 300 mL of 0.10 M NH3? The Kb of NH3 is 1.810-52. If 1.00 mol of propanoic acid (Ka=1.310-5 ) and 0.40 mol of NaOH are dissolved in enough w
Bridgewater College - CHEM - 162
CHEM 162Acid/Base Titration Calculations1. Calculate the pH at the following points during the titration of 50.0 mL of 0.1000 M HCl with 0.2000 M NaOH. volume of titrant added (mL) 0.00 5.00 10.00 15.00 20.00 22.00 24.00 24.50 24.90 24.99 25.00 2
Bridgewater College - CHEM - 162
CHEM 162Solubility Equilibrium Calcs1. What are the equilibrium concentrations of Ba2+ and SO42- after 24.56 g of BaSO4 (pKsp = 9.96) are added to 200.0 mL of pure water? (answer = 1.0510-5 M)2. What mass of BaSO4 dissolves? (answer = 4.8810-4
Bridgewater College - CHEM - 162
CHEM 162Balancing Redox Reactions(Acidic conditions)Balance the following redox reactions: 1. MnO4- + Br- Mn2+ + Br22.MnO4-+SO32- MnO42- + SO42-(Basic conditions)CHEM 162 - S2005 Dr. OverwayPage 1 of 2 BalancingRedoxRxns.docGener
Bridgewater College - CHEM - 320
Ice age deuterium T Depth (Years Before Present) loss (K) 0 0 -438 0 1 17 -438 0 2 35 -438 0 3 53 -438 0 4 72 -438 0 5 91 -438 0 6 110 -438 0 7 129 -438 0 8 149 -442.9 -0.81 9 170 -437.9 0.02 10 190 -435.8 0.36 11 211 -443.7 -0.95 12 234 -449.1 -1.84
Bridgewater College - CHEM - 320
Ice age Dust Conc (Years Before Present) (ppm) 4509 0.03 4552 0.02 4690 0.02 5259 0.03 5674 0.03 6486 0.01 6874 0.02 6924 0.02 7267 0.04 7697 0.02 7745 0.07 8091 0.04 9107 0.04 9298 0.05 10265 0.02 10515 0.03 10861 0.03 11053 0.05 11749 0.05 11973 0.
Bridgewater College - CHEM - 320
Ice age deuterium T Depth (Years Before Present) loss (K) 0 0 -438 0 1 17 -438 0 2 35 -438 0 3 53 -438 0 4 72 -438 0 5 91 -438 0 6 110 -438 0 7 129 -438 0 8 149 -442.9 -0.81 9 170 -437.9 0.02 10 190 -435.8 0.36 11 211 -443.7 -0.95 12 234 -449.1 -1.84
Bridgewater College - CHEM - 445
Name:1. Format the following numbers according to the instruction at the top of each column number number scientific notationscientific notation 2 decimal places 3 decimal places 2 decimal places 3 decimal places -0.3 0.29 -1.45 0.88 -1.28 1.79 -0.
Bridgewater College - CHEM - 125
Chemistry 125 Welcome! First day instructions: Pick up a syllabus Pick up a lab schedule Pick up a homework set Pick up CAPA instruction1/26/2007Its not Magic - Its Chemistry purchase your lab manual and safety glasses ASAPWhy Chemistry
Bridgewater College - CHEM - 125
Atomic Components Atomic number: # of protons Mass number: # protons + # neutrons Isotopes: Same atomic # + different mass # Atomic weight: the weighted avg of all isotopes Ion: a charged atom (or molecule) (# protons # electrons) Nuclear Symb
Bridgewater College - CHEM - 125
Sildenafil (Sildenafil citrate, Viagra)Nucleic AcidsChemical Bonding covalent bonds : electrons are shared between atoms ionic bonds : electrons are transferred between atoms polar bonds : electrons are unequally shared these are extremes of a
Bridgewater College - CHEM - 125
oxides of nitrogenMolecular Variety Nomenclature Rules for Ionic Compounds:cation first, then anion simple anions get ide suffix the formula of polyatomic ion written as unit polyatomic ions are in parentheses if &gt;1 in number dont add di-,
Bridgewater College - CHEM - 125
Kidney StonesSolubilityEbbing 7th ed pg. 769Factors Affecting Dissolution temperature for solids, as temp , solubility (in general) for gases, as temp , solubility (in general) solvent and solute must be similar (polar vs. nonpolar) lik
Bridgewater College - CHEM - 125
Acid/Base Reactions some covalent compounds have weakly bound H atoms and can lose them to water (acids) some compounds produce OH- in water solutions when they dissolve (bases) acid/base reaction are very important to biochemistry and environmen
Bridgewater College - CHEM - 445
Chemistry 445When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, your knowledge is of a meager and unsatisfactory kind; it may be the beginning of knowledge, but
Bridgewater College - CHEM - 445
Numerical Uncertainty everyone come up front and read the buret enter your volume in the spreadsheet p on the computerErrors in Analysis EVERY measurement has errors every measurement has random errors some have systematic errors i is imposs
Bridgewater College - CHEM - 445
Electronics most instruments work on either analog or digital signals we will discuss circuit basics parallel and series circuits voltage dividers filters high-pass, low-pass, band-pass filtersElectronic Components Resistors: resists the flo
Bridgewater College - CHEM - 445
Optical InstrumentationOptical Instrumentationa typical absorption spectrophotometer source: produces the light wavelength selector: separates the light sample container (sometimes there are two) detector: tranduces light into electrons sign
Bridgewater College - CHEM - 445
Atomic Absorption/Emission in order for these instruments to work, the sample must be atomized in order to get atomic absorptionAtomic Line Widths both absorption and emission lines are very narrow (a good thing) because there is little interact
Bridgewater College - CHEM - 445
Errors in Absorption Spectroscopy placement error small changes in the angle of the cuvette produce changes in reflection, pathlength, and P0 these lead to concentration uncertaintiesErrors in Absorption Spectroscopy low absorbance at low A,
Bridgewater College - CHEM - 445
Absorbance vs. Luminescence Some molecules absorb light Some of the absorbing molecules luminesce Most organic molecules absorb UV-vis Most organic compounds do not luminesce only fused-ring aromatic systems have appreciable fluorescenceOptica
Bridgewater College - CHEM - 445
CHEM 445Statistics and Sig Figs Key6.57 9.50 8.93 8.24 8.87 7.45 7.08 6.23 8.66 9.26 6.80 7.72Problem 1: Simple Statistics Given the following replicate measurements: 10.23 7.59 7.46 7.41 7.44 8.19 7.27 9.34 7.28 8.20 7.90 8.25 5.88 8.67 7.16 7.
Bridgewater College - CHEM - 445
CHEM 445FT Filter Quiz/WorksheetAnswer the following questions based on the FTFIlter.xls spreadsheet, located on the Worksheet page of our course home page. Do not work with others on this assignment since it is a quiz. Questions for the Environ
Bridgewater College - CHEM - 445
0 50 90 &lt;= Noise Freq. #1 (Hz) Signal freq. (Hz) 150 &lt;= Noise Freq. #2 (Hz) trunc. start (Hz) 1 &lt;= Noise Amplitude trunc. stop (Hz) SNR before 2.0 SNR after400 min. = 1 500 max = 500 2.0Pure, Noisy, and Filtered Signals12 11 10 9FT Analys150
Bridgewater College - CHEM - 125
CHEM 125Identifying Compounds WorksheetDetermine whether each compound is an ionic or covalent compound, then name it. Compound Ionic or Covalent Name 1 NO2 2 3 4 5 6 7 8 9 NaCl MgCl2 PCl3 SF6 CO2 CaBr2 CS2 FeCl310 LiBr 11 NaF 12 Na2CO3 13 NO3
Bridgewater College - CHEM - 125
Bridgewater College - CHEM - 445
Dr. OverwayCHEM 445 Instrumental AnalysisEXAM ISeptember 21, 2003Instructions: Do not open this test booklet until you are instructed to do so. Show your work in order to receive partial credit. Keep track of units and use the correct signif
Bridgewater College - CHEM - 445
Dr. OverwayCHEM 445 Instrumental AnalysisPractice EXAM II (100 pts)Instructions: Do not open this test booklet until you are instructed to do so. Show your work in order to receive partial credit. Keep track of units and use the correct signif
Bridgewater College - CHEM - 445
Bridgewater College - CHEM - 445
Identify the type of electronic transition you might find in the molecules below (identify all that apply):H N * * * * transition options * n * n * * dd * n *
UC Davis - MATH - 2009
LECTURE 5: CHARACTERIZATION THEOREM AND EXAMPLESMIHAELA IFRIM AND BRANDON BARRETTE1. Strong Exchange Property We now review the Strong Exchange Property Theorem from last lecture. Theorem 1.1. Let w = s1 s2 . . . sk be a reduced expression for w
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LECTURE 6: PROOF OF CHARACTERIZATION THEOREMBRANDON BARRETTE AND MIHAELA IFRIM1. Characterization Theorem Theorem 1.1. (Characterization Theorem) Let W be a group and S W a generating set such that s2 = e s S. Then the following are equivalent:
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Math 115a: Number Theory Homework 5This problem set is due on Wednesday, October 29. Do problems 3.5.74, 4.3.4(a), 4.3.12, 4.2.18, 6.1.6, and 6.1.40, in addition to my problems. A hint on problem 4.2.18: Show that if x2 y2 (mod p), then x y, and r
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UC Davis - MATH - 10
Math 115a: Number Theory Homework 10This problem set is due on Friday, December 5. Do problems 7.1.17, 7.1.26, 7.2.10, 7.2.16, 7.3.8, and 7.3.18, in addition to the following: GK10.1. Theorem 7.11 is the important basic result that if 2m 1 is prime
UC Davis - MATH - 10
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Math 115a: Number Theory Solutions to the Second Midterm1. What is modulo 19? Solution: From Jaime Bushi: 27100000000Jaimes solution correctly appeals to the fact that if you have an exponential mod n, and if the base b is a prime residue, then t
UC Davis - MATH - 1
Math 21B-B - Homework Set 1Section 5.1: 2. f (x) = x3 between x = 0 and x = 1. a. Estimate using lower sum with two rectangles of equal width: If we want two rectangles of equal width, we will let x = 1 . The 2 function f (x) is increasing on [0, 1]
UC Davis - MATH - 2
Math 21B-B - Homework Set 2Section 5.3:n3.P 0 k=1lim(ck 2 3ck )xk , where P is a partition of [7, 5].5x2 3x2 dx7 n6.P 0 k=1 1lim4 ck 2 xk , where P is a partition of [0, 1].4 x2 dx0 n8.P 0 k=1lim(tan ck )xk , w
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