Wednesday
December 17, 2014

Posts by Matt


Total # Posts: 1,928

For DrBob222
i had to convert 38.3 to kelvin... because i converted the initial T to kelvin.
January 19, 2008

For DrBob222
the chemistry question: v=0.465L T=559.15K P=112.496 kPa Pv/t = Pv/t 112.kpa(0.465)/559.15 = (x)(0.464428)/(247.8) x= 49.9 kPa ...i skipped conversion steps, but i'm pretty sure i did those right..
January 19, 2008

Chemistry
A sample of Kr gas has a volume of 465 mL at 286°C and 844 torr. When the gas is cooled by 38.3°C, its volume is reduced by 0.572 mL. What is the final pressure of the gas in kPa? the answer is supposed to be 105 but i keep getting 49.9!!!!!!
January 19, 2008

CHEMISTRY
A 8.90-g sample of ethane, C2H6, is mixed with 18.8 atm of O2 (an excess) in a 1.50 L combustion chamber at 130.0°C. The combustion reaction to CO2 and H2O is initiated and the vessel is cooled back to 130.0°C. What is the final pressure in the combustion chamber ...
January 17, 2008

science
what is a mineral
January 17, 2008

Chem Midterm Review
Ok, so I've been really busy with midterms and my chemistry one is tomorrow. Now, I never intended to let so much time slip by before i started studying, but it happened. It's one of my most important exams. Do I still have a chance of passing? If so, how should I ...
January 16, 2008

math
a. y= 4x b. y= 2x c. y= 1 half x
January 14, 2008

math
identify the value of m in each equation. Then match each equation with it's graph.
January 14, 2008

Calculus
how did you get ry and r^2y for y' and y''?
January 12, 2008

Calculus
I posted this several days ago but it hasn't been answered and I still can't figure it out: For which values of r does the function defined by y=e^(rt) satisfy the differential equation y''+ y'-6y = 0
January 12, 2008

Calculus
For which values of r does the function defined by y=e^(rt) satisfy the differential equation y''+ y'-6y = 0
January 10, 2008

Chemistry
Yeah, I know that, but why can Copper lose either one or two while cadmium only has a +2 OS. I think the answer has something to do with valence electrons, but I'm not sure exactly.
January 8, 2008

Chemistry
Why can Copper have both a +1 and +2 oxidation state?
January 8, 2008

Ap Chemistry
In a class discussion, my teacher told me that 74.06% of the volume of each unit cell is occupied by atoms (in the cubic closest structure). Where does this percentage come from? How can I find it?
January 7, 2008

Angles...
How do i express angles in a radian measure as multiples of pi. For example, suppose i have an angle of 30 degrees, and a angle of -270 degrees. How would I express them in a radian measure as a multiple of pi?. Thanks.
January 6, 2008

Chemistry
Thank you
January 1, 2008

Chemistry
or CH2 double bond C(CH3)CH(CH3)CH3
January 1, 2008

Chemistry
would 1. be CH3C(CH3) Double bond C(CH3)CH3
January 1, 2008

Chemistry
Hey Everyone I was wondering how I could write the condensed structural formula for the following organic chemicals: 1. 2,3-dimethyl-2-butene 2. 4-ethyl-2-hexyne 3. 3,3,6-trimethylnonane 4. 3-ethyl-4-prophylheptane 5. 3-octanol 6. 2-methyl-2-pentene 7. 5-methyl-1-hexene 8. 2,2...
January 1, 2008

Math
List the first eight prime numbers.
December 17, 2007

Writing
I am looking for some written a one act play. Write anc act out a one act play in front of class covering a specific workplace issue , exapmple my include sexual harassment, workplace stress, great/bad bosses etc.
December 10, 2007

physics
The radiation curve of the sun shows that the brightest light fro the sun is yellow- green. Why, then, do we see the Sun as whitish instead of yellow green?
December 8, 2007

physics
then it has to be reading glasses.
December 8, 2007

physics
Suppose that sunlight falls both on a pair of reading glasses and on a pair of dark sunglasses. Which pair of glasses would you expect to become warmer?
December 8, 2007

Chemistry
Barium's Oxidation State is +2, Nitrate's Oxidation state is -1 Does that help?
December 6, 2007

Physics
What two ways can waves interact? ^I have no clue what its asking
December 6, 2007

Is this how you derive the formula for arc length?
in the third step, how did you integrate the right side with no delta-variable?
December 4, 2007

chem
A 1.00 L flask containing 450 torr of H2 is connected to and mixed with a second flask with a volume of 0.500 L containing 250 torr N2. What is the final pressure of the resulting mixed gas system? a) 250 torr b)383 torr c) 450 torr d) 575 torr e) it cannot be determined
December 2, 2007

chem
A 1.00 L flask containing 450 torr of H2 is connected to and mixed with a second flask with a volume of 0.500 L containing 250 torr N2. What is the final pressure of the resulting mixed gas system? a) 250 torr b)383 torr c) 450 torr d) 575 torr e) it cannot be determined
December 2, 2007

chem
Suppose that Quebec had managed to succeed from Canada and became an independent country. Just to be difficult, they decreed that they will only measure pressure in mm Hg and volume in cm3. What value for R, the ideal gas constant, would students in Quebec use when solving the...
December 2, 2007

Math
Prove that a simple graph with n >_ 2 vertices must have atleast two vertices with the same degree. There was a hint given in the book saying that the key to this is the graph can not have both a vertex of 0 degree and a vertex of n-1 degree
December 1, 2007

Math
It means that it is attached to that many other vertexes, say if a vertex is attached to two other vertex by lines then it has degree 2
December 1, 2007

Math
Prove that a simple graph with n >_ 2 vertices must have atleast two vertices with the same degree. There was a hint given in the book saying that the key to this is the graph can not have both a vertex of 0 degree and a vertex of n-1 degree Thanks
December 1, 2007

Math
Use iteration to guess an explicit formula for the sequence. Pk=Pk-1+2*3^k P1=2
November 30, 2007

Business
Can you help me to understand what is the role of power in the control process? I am not even really sure I understand what the question is asking
November 29, 2007

Calc
I did simplify P' to be P'=-2p+33(p-9+100)+1(-p^2+33p+9) now I have to set the derivative,P', equal to zero and I do not know how to solve it.
November 25, 2007

science
How do you measure velocity???????
November 25, 2007

Algebra
I got 3p(-p^2+22) Now what
November 24, 2007

Algebra
I have learned factoring but I do not know what to do for this problem
November 24, 2007

Algebra
How do I solve -3p^2+66p=0
November 24, 2007

PHILOSOPHY REPOST
I'm sorry, I forgot it is thanksgiving in the States.
November 22, 2007

PHILOSOPHY REPOST
why is it wrong to teach creationism in a high school science class, based on the moral theory that the good of many outweigh the good of the individual? and im asking your personal opinion on this, im perfectly capable of going to google and typing in few key words.
November 22, 2007

Chemistry
i cant find a Ka chart that includes all those, and also, i wasnt even any numbers whatsoever to work with!
November 20, 2007

Chemistry
Rank the following compounds in order of increasing acid strength (1 = weakest, 4 = strongest) HCOOH CH2ClCOOH CHCl2COOH CH3COOH
November 20, 2007

Oral speech
bump?
November 19, 2007

Oral speech
Persuasive speech comparing old to modern games? I have to have a persuasive speech lasting 8-10 minutes, in which i am trying to persuade the listeners that modern games have came away from the "point" of a video game. and that old school games like SNES games and ...
November 19, 2007

math
an run contains 40 balls some red and some white if the probability of selecting a red ball is .45 how many red baslls are in the run?
November 19, 2007

ACC
A reason why absorption costing income statements are sometimes difficult for the manager to interpret is that: A)they omit variable expenses entirely in computing net operating income. B)they shift portions of fixed manufacturing overhead from period to period according to ...
November 16, 2007

ACC
When sales are constant, but the production level fluctuates, net operating income determined by the variable costing method will: A)fluctuate in direct proportion to changes in production. B)remain constant. C)fluctuate inversely with changes in production. D)be greater than ...
November 16, 2007

ACC
someone help me with this questions please 1. How would the following costs be classified (product or period) under variable costing at a retail clothing store? Cost of purchasing clothing Sales commissions A) Product Product B) Product Period C) Period Product D) Period ...
November 16, 2007

History
I need to find detailed information on Charles Darwin, specifically, about his results and the RELIGIOUS PERSECUTION involved with it. Thanks in advance!
November 3, 2007

Philsophy
Please help! I need a case of scientific fraud where the scientist was working alone and unwilling to cooperate/get reviewed by other scientists. (the standard of openness must apply) goggle doesnt help at all, as my case is so specific!
November 3, 2007

CHEMISTRY
When 2.47 g of chromium is reacted with an excess of sulphur, the compound Cr2S3 results. Treating the Cr2S3 so formed with strontium metal converts all of the sulphur to SrS. Reacting the SrS with sodium metal then converts all the SrS to Na2S. What mass in grams of Na2S is ...
November 3, 2007

Chemistry
A sample of 1.029g of KC8H5O4 was titrated with an NAOH solution of unknown concentration. If 22.83 mL of base was used to reach the endpoint, what was the concentration of NaOH? What mass of KC8H5O4 should be used such that a volume of NaOH between 35-40 mL is needed to reach...
November 1, 2007

Chemistry
Calculate the molar solubilty of CaC2O4 in a solution that has been buffered to a pH of 4.00 Remember to account for reactions involving H2C2O4 acting as an acid in water. To account for the buffer, simply assume that H+ = 1.00X 10^-4
October 30, 2007

Calculus Test Question ASAP
The graph of y = cos x is concave down on which interval? (-pi,0)??????? please help!!!!
October 30, 2007

Calculus Check
A survey of one thousand people found that 70% of the people have a CD player, 85% have a telephone, and 45.2% have a computer. At least how many people have all three objects? Is the answer 152?
October 29, 2007

Cacluluc CHECK
A survey of one thousand people found that 70% of the people have a CD player, 85% have a telephone, and 45.2% have a computer. At least how many people have all three objects? Is the answer 152?
October 28, 2007

Calculus Bonus
Form two four-digit numbers from the digits 2, 3, 4, 5, 6, 7, 8, and 9, using each digit exactly once, so that the absolute value of the difference of the two numbers is as small as possible. I don't know where to start, any help would be greatly apprecitated.
October 27, 2007

mathematics
What is something that is about or exactly a kiloliter?
October 25, 2007

mathematics
What is something that is about or exactly a dekaliter?
October 25, 2007

mathematics
What is something that is about or exactly a decigram?
October 25, 2007

mathematics
What is something that is about or exactly deciliter?
October 25, 2007

mathematics
What is something that is about or exactly a centiliter?
October 25, 2007

mathematics
What is something that is about or exactly a centigram?
October 25, 2007

mathematics
What is something that is about or exactly a mililiter?
October 25, 2007

mathematics
What is something that is exactly or about a miligram?
October 25, 2007

science
What are the definitions for rock and mineral?
October 25, 2007

Calculus Check
A survey of one thousand people found that 70% of the people have a CD player, 85% have a telephone, and 45.2% have a computer. At least how many people have all three objects? Is the answer 258, because thats what I keep getting?
October 25, 2007

Calculus Bonus
Form two four-digit numbers from the digits 2, 3, 4, 5, 6, 7, 8, and 9, using each digit exactly once, so that the absolute value of the difference of the two numbers is as small as possible. Confused need to double check with you all.
October 25, 2007

Calculus Bonus
There is this bonus that I need so bad for my grade. I have tried several ways to answer this question and have tried several equations. Please Help Bouquets are priced on the basis of the numbers and types of flowers used. What is the price of the fourth bouquet? Bouquet 1 = ...
October 25, 2007

Entropy
Thank you. I was missing the units the whole time. S = H/T Convert kj to Joules; convert C to K.
October 24, 2007

Entropy
Tungsten has been used to make light bulb filaments since 1908. The melting point of tungsten is 3422C and the heat of fusion is 35 kJ/mole. Calculate the entropy change associated with the melting of one mole of tungsten.
October 24, 2007

Calculus
Tried this problem severeal ways. Get a different answer every time, but it is in the same ballpark. Any help would be much appreciated. How many zeros are at the end of the product of the first fifty positive integers?
October 24, 2007

math
Out of 39 students in a finite math class, 25 are male, 23 are business majors, 24 are first-year students, 15 are male business students, 18 are male first-year students, 16 are first-year students who are business majors, and 12 are male first-year business majors.
October 24, 2007

Calculus Help?
I have no idea where to start? A survey of one thousand people found that 70% of the people have a CD player, 85% have a telephone, and 45.2% have a computer. At least how many people have all three objects?
October 23, 2007

Calculus
A survey of one thousand people found that 70% of the people have a CD player, 85% have a telephone, and 45.2% have a computer. At least how many people have all three objects?
October 22, 2007

Calculus
How many zeros are at the end of the product of the first fifty positive integers?
October 22, 2007

Calculus
Form two four-digit numbers from the digits 2, 3, 4, 5, 6, 7, 8, and 9, using each digit exactly once, so that the absolute value of the difference of the two numbers is as small as possible.
October 22, 2007

for reiny
2. aren't your x and y intercepts the base and height of your triangle?? take area = 1/2 base*height = ..... = c which is the constant of the original equation!!! for this, you get 2c?
October 17, 2007

calculus
how can I calculate this deriivative: 1/(sin(x-sinx))?
October 14, 2007

World History: Philosophy
Thank you very much
October 12, 2007

World History: Philosophy
Oh, so he thought it was heretic to the Church
October 12, 2007

World History: Philosophy
Why does Emperor Justinian outlaw Greek Philosophy in 529 AD?????
October 12, 2007

Calculus!!!
the derivative of cot^3sqrtx Do you use prduct rule, if so what is your u,v, dv, or du.
October 8, 2007

Calculus Verification
I just want to make sure im right. Find the derivative if y= arcsec(x+3). I got 1 ======================= |x+3|sqrt(x+3)^(2)-1 Is this the final answer or do you need to solve (x+3)^2 and get (x^(2) + 9x + 9)
October 7, 2007

Calculus Help!!!
Find an equation for the tangent and normal to the curve x^2+y^2=9 at x=1 Do you have to simplify the problem to get y on one side. or is your u=x^2 v=y^2 du=2x dv=2y if so then what next?
October 7, 2007

Calculus Help!!!!
Fnd the derivative if y=x^(1+sqrt2) Is this right (1+sqrt2)/(x) x^(sqrt2)
October 7, 2007

Calculus Help!!!
Find the derivative if y=e^(2x)-lnx^(2) Im stuck, all i have is 2e^(2x)-2/x
October 7, 2007

Calculus TEST!!!!
Find an equation for the tangent and normal to the curve x^2+y^2=9 at x=1
October 7, 2007

Calculus Test Question!!!!!
Find the derivative if y=x^1+sqrt2
October 6, 2007

Calculus Test Question!!!!!
Find the derivative if y=sec^-1 (x+3) Please any help.
October 6, 2007

Calculus
Find the derivative if y=sin^-1 (3x)
October 5, 2007

Calculus
Find the derivative if y=sec^-1 (x+3)
October 5, 2007

Fin&Acc
B3 Company is a manufacturing firm that uses job-order costing. The company's inventory balances were as follows at the beginning and end of the year: Beginning Ending Raw materia $26,000 $31,000 Work in process 77,000 59,000 Finished goods 124,000 139,000 The company ...
October 5, 2007

Calculus
Find the derivative if x^3 + 4xy^2 - y^4 = 7
October 4, 2007

Calculus
Find the derivative if y^3 + y = 2cosx
October 4, 2007

Calculus
Find an equation for the tangent and normal to the curve x^2 + y^2 = 9 at x=1
October 4, 2007

Calculus?
If a, b, and c are digits for which 7 a 2 -4 8 b ========= c 7 3 then a + b + b = _______ (A) 14 (B) 15 (C) 16 (D) 17 (E) 18
October 3, 2007

language
is this a sentace......... A block of four different,colorful stamps that commemorate Earth day.
October 2, 2007

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