Tuesday
August 4, 2015

Posts by jason


Total # Posts: 1,168

arithmetic
n=(3/5)2N=
January 8, 2009

physics
Two balls are connected by a string that stretches over a massless, frictionless pulley. Ball 1 has a mass of 0.45 kg and is held 0.74 m above the ground. Ball 2 has a mass of 5.7 kg and is held 0.88 m above the ground. When the balls are released, ball 2 falls to the ground, ...
December 22, 2008

Physics
Two balls are connected by a string that stretches over a massless, frictionless pulley. Ball 1 has a mass of 0.45 kg and is held 0.74 m above the ground. Ball 2 has a mass of 5.7 kg and is held 0.88 m above the ground. When the balls are released, ball 2 falls to the ground, ...
December 21, 2008

social studies
what is the largest river that runs through asia
December 17, 2008

economics
I answered some questions. pls check if they are correct and pls help in questions e and f. Production Possibilities Possibility Maximum Units of Good A Maximum Units of Good B a 200 0 b 180 60 c 160 100 d 100 160 e 40 200 f 0 220 a. Plot these production possibilities, label ...
December 15, 2008

math
Tom spent (in order) a third of his life to date in the united states, a sixth in india, twelve years in egypt, half the remainder of his time in australia, and as long in canda as he spent in india. where did he spend his fortieth birthday? use an alegbraic equation to solve ...
December 15, 2008

Math
1)Write a quadratic equation with integer coefficients that has -4+7i(Radical 3) and -4-7i(Radical 3) as its roots. 2) Solve your answer to part 1 using the quadratic formula verifying your answer
December 11, 2008

pre cal
solve for x: x^(2/3)=(1/27) (2^(x)+4)/(2^x)=2 explain please
December 7, 2008

physics
a crane drops a .3 kg steel ball onto a steel plate. the ball's speeds just before impact and after are 4.5 m/s and 4.2 m/s respectively. If the ball is in contact with the plate for .03 s, what is the magnitude of the average force that the ball exerts on the plate during...
December 4, 2008

chem
which of the following could be used to dissolve a carboxylic acid into the aqueous phase? a)MgSO4 b)1.5 M HCl c)1.0 M NaHCO3 d)2.0 M Na2SO4 e)saturated NaCl I'm leaning towards choice e because you can have an aqueous solution of sodium salt and a carboxylic acid.
December 3, 2008

English
What does Martin Luther King mean by "Continue to work with the faith that unearned suffering is redemptive?"
December 2, 2008

central america & the caribbean
yea ok kool,
December 1, 2008

central america & the caribbean
aight then thanx
December 1, 2008

central america & the caribbean
word bank : belize,costa rica ,coffee, cuba,honduras,lead,mestizos,multicultural,oil,panama canal,puerto rico,rice,sugar cane, slavery,canal 2.___was introduced in the caribbean after indians died from european diseases. 3.central america is an ___between north and south ...
December 1, 2008

CHEMISTRY
Observations Mass of Fe metal:100 MG Volume of water in Calorimeter: 100 ML Mass of water in Calorimeter (use 1g per ml): 100G Initial Temperature of metal: 20 Initial Temperature of water: 20 Final Temperature (both metal and water): 100 Determine the heat gained by the water...
November 30, 2008

English- vocab
can you please help me figure out a word that means something that happens for no reason and we dont know the reason why it happens. i dont think its mystery, I'm not sure.
November 28, 2008

chem
Would you expect 2-chlorobutane to react faster or slower than 2-bromobutane under Sn1 conditions? Sn2 conditions?
November 24, 2008

chem
would you expect 2-chlorobutane to react faster or slower than 2-bromobutane under sn1 conditions? sn2 conditions? - would it slower because of the stronger bond? and it would be sn2 reaction? i'm i on the right track?
November 24, 2008

chem
List the experimental conditions that favor Sn1 reactions, and those that favor Sn2 reactions.
November 24, 2008

chem
(R)-(+)- limonene has a boiling point of 176 C. What made it possible to steam distill it at 100C? - is it because you could have different weights of each one?
November 24, 2008

Chem
How would you expect the following series of compounds to compare in behavior in teh two tests(SN1 vs. SN2)? CH3CH=CHCH2Br (1-bromo-2-butene) CH3-C=CHCH3 l Br CH3CH2CH2Br (1-bromopropane) I know primary alkyl halides like 1-bromopropane favor SN2 reactions and tertiary alkyl ...
November 22, 2008

math
Using the table (ADBC)= 8 (DACB)=5 (BADC)=3 (BDCA)=1 (DCAB)=2 (it is supposed to be a table but the table won't paste correctly). Deter mine: a) deter mine the winner using the Borda count b) deter mine the winner using the Hare method? What round did you find an answer? ...
November 20, 2008

math
Sorry that did not come out good. Let me try again. In voting of 4 candidates, the outcomes are recorded as: (ADBC)=8 (DACB)=5 (BADC)=3 (BDCA)=1 and (DCAB)=2. It is supposed to be a table but it didn't copy. Using this table, determine: a)what is the total number of votes ...
November 20, 2008

math
(ADBC) (DACB) (BADC) (BDCA) (DCAB) 8 5 3 1 2 Using that table, determine: a) the total number of votes b) what does (ADBC) mean c) What the "8" mean d)how many votes will be necessary for a majority, why? is a)19 b) rank c) the number of votes d)?
November 20, 2008

chem
An optical rotation study gives a result of alpha=+140 degrees. Suggest a dilution experiment to test whether the result is indeed +140 degrees, and not -220 degrees. -could polarimetry experiment be used to find the r and s isomer?
November 18, 2008

Chem
A sample of 2-butanol has a specific rotation of 3.25. Determine the % ee and molecular composition of this sample. The sepcific rotation of pure (+)-2-butanol is +13.0. is it (3.25/13.0)x100%= 25%... i'm a little confused on the molecular composition though.
November 18, 2008

Chem
What determines whether 2-bromobutane undergoes an Sn1 or an Sn2 reaction how would you favor SN2 formation?
November 17, 2008

Math
your mom
November 13, 2008

chemistry
we did an extraction of a mixture between neutral compound fluorene and an unknown carboxylic acid. Diethyl ether was used as the organic solvent while NaOH was used as the aqueous solvent. After extracting the unknown acid we also had to extract the neutral compound and to do...
November 9, 2008

chemistry
what experimental difficulty would you encounter if you had neglected to include a drying step before evaporating the ether solution of the neutral organic compound? Water was added to the organic solvent ,but a drying agent wasn't added. So would the difficulty be a ...
November 9, 2008

chemistry
Calculate the number of grams of reactant left over when 28.35 grams of silver reacts with 50.0 liters of air at STP which is 20.9476 % oxygen by volume. The density of air at STP is 1.292 g/L. attemtp at solution volume of oxygen= .209476*50L=10.5L How do i go from volume of ...
November 8, 2008

chemistry
Calculate the number of grams of reactant left over when 28.35 grams of silver reacts with 50.0 liters of air at STP which is 20.9476 % oxygen by volume. The density of air at STP is 1.292 g/L. attemt at a solution: m = dv = 64.6 g of air moles silver =28.35/108=0.26 moles of...
November 7, 2008

chemistry
A sample of acid (C,H,O) massing 1.000 g burns to give 1.466 g of carbon dioxide and 0.6001 g of water. The molecular mass is approximately 120 g/mol. Calculate the molecular formula of the acid
November 7, 2008

Chem
What experimental difficulty would you encounter if you had neglected to include a drying step before evaporating the ether solution of fluorene?
November 5, 2008

Chemistry
how do u draw the lewis structure of F3S-SF
November 4, 2008

Chemistry
What is the geometry of S2O82- its basically two SO4 molecules connected by the O-O bond
November 4, 2008

chem
A student carried out a simple distillastion on a compound known to boil at 124 C and reported an observed boiling point of 116-117 C. Gas chromatographic analysis of the product showed that the compound was pure, and a calibration of the thermometer indicated that it was ...
November 3, 2008

chem
why would it be dangerous to heat a liquid in a distillation apparatus that had no vent or opening to the laboratory? - is this because the liquid will create vapor pressure and could cause a serious injury to a student?
November 3, 2008

chem
why do we add boiling chips or boiling stones before the distillation starts? Boiling chips should never be added to a hot solution!Why? i don't know what the answer is to the first one, but as for the second i think i have a clue. is it that the boiling chips will start a...
November 2, 2008

Math
Okay tell me if thease lines are parallel, perpendicular or neither. y=3x-2 y=1/3x+2
October 28, 2008

algebra
u solve the equation and the point should be the the end of the solution.
October 28, 2008

chem
Thank you soo much for all of your help!!!
October 28, 2008

chem
K2CO3 is an excellent drying agent for some classes of organic compounds. would it be a better choice for an acid (RCO2H)or an amine(RNH2)? why? i know this is RNH2. could it be explained that potassium carbonate itself is basic so it will make water and a salt if mixed with ...
October 28, 2008

chem
what precautions should be observed when an aqueous sodium carbonate solution is used to extract an organic solution containing traces of acid? is it that aqueous sodium carbonate is extremely combustible, which can't be exposed to an open flame?
October 28, 2008

chem
what precautions should be observed when an aqueous sodium carbonate solution is used to extract an organic solution containing traces of acid? is it that aqueous sodium carbonate is extremely combustible, which can't be exposed to an open flame?
October 28, 2008

chem
a crude non acidic product mixture dissolved in diethyl ether contains acetic acid. describe an extraction procedure that could be used to remove the acetic acid.
October 28, 2008

physics
the period of a comet is 100 years. At ists closest approach(perihelion), it is 0.37 AU from the sun. What is the semi-major axis of the comet's orbit? How for does it get from the sun(what is its aphelion distance)?
October 25, 2008

physics
a 9.9*10^23 kg planet orbits a star in a circular orbit. The planet is 5.6 AU away from the star and has an orbital velocity of 32 km/s. What is the mass of the star. (1AU = 1.496*10^11m)
October 25, 2008

physics
The sun rotates around the center of the milky way galaxy at a distance of about 30,000 light years (1ly= 9.5*10^15m). if it takes about 200 million years to make one rotation, estimate the mass of our galaxy. Assume that the mass distribution of galaxy is concentrated mostly ...
October 25, 2008

Vocabularay
First of all, look at the definition in the dictionary: Main Entry: van·guard Pronunciation: 'van-"gärd also 'va[ng]- Function: noun Etymology: Middle English vantgard, from Middle French avant-garde, from Old French, from avant- fore- (from avant ...
October 23, 2008

vocabulary
I dont understand the definition? i was asking for an example...
October 23, 2008

vocabulary
how do u use vanguard in a sentence?
October 23, 2008

Vocab
Does: Ger taut smile revealted the highg levels of stress she went through today make sense? for taut?
October 23, 2008

Vocab
Is she suddenly veered off the road to avoid a deer make sense?
October 23, 2008

Vocab
How do u use veer in a sentence?
October 23, 2008

Math - 9th grade
A company has a 22% profit margin, and has employee fraud of $220,000. Calculate the additional revenue to offset the lost income. Thanks.
October 22, 2008

Math
Thanks Damon. My computation was ($1,400,000 * 0.20) + ($1,400,000) = $1680000
October 22, 2008

Math
You are told that a company has a 20% profit margin, and the discovered fraud has caused $1,400,000 more needed revenue to cover the fraud. how much was stolen?
October 22, 2008

chem
Thanks alot. yeah I was a little confused as to which was more polar.
October 21, 2008

chem
The Rf value of compound A is .34 when the TLC plate is developed in hexane and .44 when the plate is developed in diethyl ether. Compound B has an Rf value of .42 in hexane and .60 in diethyl ether. Which solvent would be better for seperating a mixture of compounds A and B ...
October 21, 2008

chem
why does the addition of a salt (like sodium chloride) to the aqueous layer sometimes help break up an emulsion that forms in an extraction? - sorry about that last post
October 21, 2008

chem
when two layers form during an ether/water extraction, what would be an easy, convenient way to tell which layer is which if the densities were not available?
October 14, 2008

chem
well if it is wet then the solution will contain some impurities from the water or which ever other compound is added to the solution.
October 14, 2008

chem
what are some of the factors that affect melting point besides, impurities, pressure, and having a wet solution?
October 14, 2008

chem
Explain why ethanol and acetone are not suitable solvents for extracting organic compounds from aqueous solutions. does it have to do with their density?
October 14, 2008

Chem
so it would be lower right?
October 13, 2008

Chem
In the previous experiment, you recrystallized salicylic acid. If you were askedto take melting point of your crystals, would it be necessary to dry the salicylicacid crystals thoroughly first? What result would you expect from your melting point determination if you did not ...
October 13, 2008

6th grademath
this is a word problem:the country of hoffnemath is holding its presidential election this week. there three candidates(a,b,c,) and each eligible voter can vote for two of them. the candidate with the most total votes wins the election. here is a summary of the results: >...
October 9, 2008

chem
what is the typical melting range of a compound? I think .5 to 2.0 C is way tooo low.
October 7, 2008

chem
A student in 51LA conducts a melting point experiment with an unknown compound and observes a melting range of 122 – 129 °C. Is this a typical range for a melting point? If not, what range would be typical? Well for a pure compund the meliting range is from .5 to 2.0C...
October 7, 2008

Chem
Thank you. i understand this now.
October 7, 2008

Chem
the solubility of a compound is 59g per 100 mL in boiling methanol and 30g per 100mL in cold methanol, whereas its solubility in water is 7.2g per 100 mL at 95 C and .22g per 100mL at 2C. Which solvent would be better for recrystallization of the compound? Explain. Well this ...
October 7, 2008

stoichiometry
confused
September 23, 2008

English-Symbolism
I need examples of what the Moon has symbolized in literature, history, popular culture, legends, etc. I need to create a paragraph, so ideas will be appreciated.
September 13, 2008

Short story part 1
WHAT ARE CONVENTIONS?
September 8, 2008

language arts: reading
which element is especially significant in this passage?
September 5, 2008

French
ok thanks, I'm sure this'll help ^^
September 3, 2008

French
ok thanks ^^
September 3, 2008

French
no, no I'm not... sorry
September 3, 2008

French
Hey I was in french immersion last year, but now I'm not cuz I moved, and I'm wondering, is there a website so I can catch up on my french so I'll be able to at least UNDERSTAND french? thanks! ~jason~
September 3, 2008

history
dude, I'm sure you can figure this on out easily, just go to google or wikipedia.
September 3, 2008

biology
messages from nerve cells go to the ....... ........ ? please help
August 27, 2008

math
what is the next letter w,s,p,l,h
August 22, 2008

finance (depreciation)
Depreciation is a source of cash inflow because? A. it is a tax-deductible non-cash expense B. is supplies cash for future asset purchases C. it is a tax-deductible cash expense D. it is a taxable expense My answer is A because depreciation is a tax deductable non-cash expense.
July 26, 2008

finance (operational efficiency)
The best indication of the operational effiency of management is? A. net income B. earnings per share C. EBIT D. gross profit I like net income as a metric for measuring operational efficiency of management. The amout of money a corporation has after all the bills are paid is ...
July 26, 2008

finance (bonds vs. perferred stock)
Corporations prefer bonds to preferred stock for financing their operations because A. preferred stocks require a dividend B. bond interest rates change with the economy while stock dividends remain constant C. the after-tax cost of debt is less than the cost of preferred ...
July 26, 2008

finance (risk premium)
The risk premium is likely to be highest for? A. U.S. government bonds B. corporate bonds C. gold mining expedition D. either B or C I like C. I think th risk premium the rate added to the risk free rate would be highest for a gold mining expedition.
July 26, 2008

finance (assumptions)
The cost of capital for common stock is ke=(D1/Po)+g. What are the assumptions of the model? A. growth (g) is constant to infinity B. the price earnings ration stays the same C. the firm must pay a dividend to use this model D. all of the above are assumptions of the model The...
July 26, 2008

finance (total asset turnover)
Total asset turnover indicates the firm's? A. liquidity B. debt position C. ability to use its assets to generate sales D. profitability I read about a asset turnover ratio in the text book. this ratio by itself is useless but when compared to the company and industry ...
July 26, 2008

finance (net income)
If a firm has a break-even point of 20,000 units and the contribution margin on the firm's single product is $3.00 per unit and fixed costs are $60,000, what will the firm's net income be at sales of 30,000 units? A. $90,000 B. $30,000 C. $15,000 D. $45,000 the firm&#...
July 26, 2008

finance (sales on credit)
In general, the larger the portion of a firm's sales that are on credit, the ... A. lower will be the form's need to borrow B. higher will be the firm's need to borrow C. more rapidly credit sales will be paid off D. more the firm can buy raw materials on credit I ...
July 26, 2008

finance (after-tax profit margin)
The ABC Corp. had net income before taxes of $4000,000 and sales of $2,000,000. If it is in the 50% tax bracket its after-tax profit margin is? A. 5% B. 10% C. 20% D. 25% net income $400,000 - 50% taxes = $200,000 $200,000 / $2,000,000 sales = 10% after-tax profit margin
July 26, 2008

Finance (after-tax cost)
Assuming a tax rate of 50%, the after-tax cost of a $200,000 dividend payment is? A. $200,000 B. $100,000 C. $-100,000 D. none of the above O.K., given a $200,000 after-tax dividend payment and a 50% tax bracket. That means the company had at least $400,000 or more before ...
July 26, 2008

finance (retained earnings)
The retained earnings of the firm belong to A. creditors B. prefered stockholders C. common stockholders D. bondholders retained earnings is a company asset. it is money that the company keeps rather than paying a dividend to the stockholders. I like C for my answer retained ...
July 25, 2008

finance (current asset)
An item which may be converted to cash within one year or one operating cycle of the firm is classidied as a.... A. current liability B. long-term asset C. current asset D. long-term liability I like C current asset-the quest is the definition of a current asset Is this correct?
July 25, 2008

finance (capital to corporations)
the financial markets allocate capital to corporations by A. reflecting expectations of the market participants in the prices of the corporation's securities B. requiring higher returns from companies with lower risk than their competitors C. rewarding companies with ...
July 25, 2008

finance (depreciation)
Depreciation is a source of cash inflow because? A. it is a tax-deductible non-cash expense B. it supplies cash cor future asset purchases C. it is a tax-deductible cash expense D. it is taxable expense depreciation is tax deductable because the original purchase of a machine ...
July 25, 2008

finance (stock price)
A firm with earning per share of $5 and a price-earnings ration of 15 will have a stock price of? P/E ratio = stock price / earnis per share 15 = X / 5 X = 15(5) x = 75 FINAL ANSWER stock price is $75.00 Is this correct?
July 25, 2008

finance (efficiency of management)
The best indication of the operational efficiency of management is? A. net income B. earnings per share C. EBIT D. gross profit I like net income as a metric for operational efficiency because net income is how much money the company has after to paid all the bills and taxes...
July 25, 2008

finance (bonds to stock)
corporations prefer bonds to preferred stock for financing their operations because? A. prefered stocks require a dividend B. bond interest rates change with the economy while stock dividends remain constant C. the after-tax cost of debt is less than the cost of preferred ...
July 25, 2008

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