Saturday

January 21, 2017
Total # Posts: 927

**Chem**

Variation of the rate constant with temperature for the first-order reaction 2N2O5(g) 2N2O5(g) + O2(g) Is given in the following table. Determine graphically the activation energy for the reaction. T(K) k(s^-1) 2981.74 x 10^-5 308 6.61 x 10^-5 318 2.51 x 10^-4 328 7....

*July 17, 2010*

**algebra**

Time to swing. The period T (time in seconds for one complete cycle) of a simple pendulum is related to the length L (in feet) of the pendulum by the formula 8T^2=n ^2 L. If a child is on a swing with a 10 foot chain, then how long does it take to complete one cycle of the ...

*July 15, 2010*

**ENG 101**

My apologies, I see now that I forgot to include my answer choices. 1A, 2B, 3A, 4A, 5A, 6B, 7B, 8A, 9A, 10A, 11B, 12B, 13B. 14B, 15A, 16B, 17A.

*July 10, 2010*

**ENG 101**

I am wandering if my answers and rationale are correct. The capital X denotes my chosen answer and my rationale follows the statement choices. Comprehensive Grammar CheckPoint Read the following sentences, and focus on the grammar area specified in the left column. Then, ...

*July 10, 2010*

**English**

I agree with Writeacher. According to APA guidelines, none of the above are correct.

*July 9, 2010*

**Math**

Hello Damon im not understanding... are you saying the answer is c?

*June 30, 2010*

**Math**

Find a polynomial of degree 3 with roots 3, 4 - i. Which one is it? A.x3 - 10x + 15 B.x3 + 15x2 + 4x - 50 C.x3 - 11x2 + 41x - 51 D.x3 + 24x2 + 3x - 12

*June 30, 2010*

**math**

1500 dollars into a 6 month CD compounding daily with a 4% APR. How much do u have at the end of your six months?

*June 17, 2010*

**math**

A deck of 38 cards contains 16 blue cards, 6 red cards, and 16 yellow cards. What is the probability of randomly drawing a blue card from this deck?

*June 16, 2010*

**History**

what is Soweto Dance Theater

*June 16, 2010*

**History**

The impact of increased discrimination and segregation practices between 1876 and 1900 in the District. Be sure to describe how this discrimination and segregation diminished social, economic, and political gains which were enjoyed by black Washingtonians immediately after the...

*June 9, 2010*

**Social studies**

What is the relation between lack of freedom and poverty? Thanks, Paul

*May 31, 2010*

**managerial economics**

1. Some games of strategy are cooperative. One example is deciding which side of the road to drive on. It doesn’t matter which side it is as long as everyone chooses the same side. Otherwise, everyone may get hurt. Driver 2 Left Right Driver 1 Left 0,0 -1000 -1000 Right -...

*May 17, 2010*

**algebra**

Quan is shopping. He can buy 2 pairs of pants and 1 shirts for $79.85 ( before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85 (before tax is added). To figure out how much a shirt or a pair of pants costs,you must first identify the conditions. What is one ...

*May 6, 2010*

**algebra**

Thank you Poppy and Reiny!!!!!!!!!!!! :)

*May 5, 2010*

**algebra**

Quan is shopping. He can buy 2 pairs of pants and 1 shirts for $79.85 ( before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85 (before tax is added). To figure out how much a shirt or a pair of pants costs,you must first identify the conditions. What is one ...

*May 5, 2010*

**algebra**

Quan is shopping.He can buy 2 pairs of pants and 1 shirt for $79.85 (before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85.(before tax is added). To figure out how much a shirt of a pair of pants cost, you must be able to write the equations. What equations ...

*May 5, 2010*

**algebra**

Quan is shopping.He can buy 2 pairs of pants and 1 shirt for $79.85 (before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85.(before tax is added). To figure out how much a shirt of a pair of pants cost, you must be able to write the equations. What equations ...

*May 5, 2010*

**algebra**

Quan is shopping.He can buy 2 pairs of pants and 1 shirt for $79.85 (before tax is added). He can buy 1 pair of pants and 2 shirts for $69.85.(before tax is added). To figure out how much a shirt of a pair of pants cost, you must be able to write the equations. What equations ...

*May 5, 2010*

**algebra**

which inequality is the same as -4x + 2y <= 8? a)y >= -2x + 4 b)y <= -2x + 4 c)y <= 2x + 4 d)y >= 2x + 4 i will like to know if my answer is correct or not. c

*May 5, 2010*

**algebra**

which inequality is the same as -4x + 2y <= 8? a)y >= -2x + 4 b)y <= -2x + 4 c)y <= 2x + 4 d)y >= 2x + 4

*May 5, 2010*

**calculus**

How do you differentiate the maclaurin series for 1/(1-x) twice to find the maclaurin series of 1/(1-x)^3.

*April 26, 2010*

**Chemistry**

Ah! I have the same question. Could you explain it?

*April 25, 2010*

**Finance**

816.00 divided by 12 I think

*April 20, 2010*

**Finance**

Ms Sue, I am not a student, just trying to find out this answer for personal reasons. Thanks for your help. I thing I multiply 3.4 time 24000 divided by 12 which is about 600 per month....right

*April 20, 2010*

**Finance**

sorry, i don't understand Ms Sue

*April 20, 2010*

**Finance**

Does that mean divided by 12?

*April 20, 2010*

**8th grade**

what was the ultimate result of Zheng Hes voyages of discovery in the 1400?

*April 11, 2010*

**Advanced Accounting**

A. (1) 12% x ($1,000,000-400,000) = $72,000 normal earnings. Expected future earnings = $150,000. Excess earnings = $150,000 - 72,000 = $78,000. Excess earnings x 5 years = $390,000 goodwill. (2) $78,000 x 3.60478 (discount rate of 12% at 5 years) = $281,173 goodwill. (3) $78,...

*April 11, 2010*

**ECONOMICS**

As the economy expands, it requires les and less investment.

*April 8, 2010*

**Physics**

Compare and contrast concepts of unsaturated, saturated and super saturated solutions. How would you make each type. What would they be useful for?

*March 31, 2010*

**12th grade**

Everyone has the right to do whatever he or she want

*March 29, 2010*

**algebra**

Thank You Kathleen your a life saver

*March 24, 2010*

**algebra**

What is 7/12 as a percent and decimal???

*March 24, 2010*

**algebra**

What is 7/12 as a percent and decimal?

*March 24, 2010*

**Algebra**

What is 7/12 as a decimal and a percent???

*March 24, 2010*

**Poetry**

What would be a good thesis statement for "Mid-Term Break" by Seamus Heaney I've read it about 100 times and I've analyzed it a bunch of times and need help with at least two of the three prong thesis statement.

*March 23, 2010*

**spanish**

¿Dónde te graduaste de la secundaria (high school)?

*March 21, 2010*

**History**

Why was Andrew Jackson considered a "common man" political wise, not how he lived. I mean what three or two events and decisions did Jackson do during his presidency that made him the citizen president?

*March 19, 2010*

**decimals**

write decimal for 47.5%

*March 17, 2010*

**Chemistry**

Kb for aniline is 4.3 x 10^-10. What does this tell you about aniline? Please help!

*March 14, 2010*

**PHYSICS**

4.9 3.5*square root of 2

*March 5, 2010*

**Math riddle**

Thanks, Ms. Sue Mathmate thanks that's what I thought just wanted to make sure maybe it was a misprint on the riddle.

*March 2, 2010*

**Math riddle**

I am a two digit number greater than 40.You can divide me by 7 and also by 8, but not any other set of single digit number.what number am I

*March 2, 2010*

**Calculus**

If f(x)=e^(x+5lnx) find f'(4), correct to two decimal places.

*February 27, 2010*

**calculus**

But then would this confirm the limiting behavior of the graph because at every interval up to infinity it would approaching zero?

*February 24, 2010*

**calculus**

I meant to say zero

*February 24, 2010*

**calculus**

is it because every interval of one the integrals approach 1?

*February 24, 2010*

**calculus**

Yes I have, but I don't understand why the integral would go to zero. And the description of the interval.

*February 24, 2010*

**calculus**

Posted by Paul on Friday, February 19, 2010 at 3:57am. I have the function f(x)=e^x*sinNx on the interval [0,1] where N is a positive integer. What does it mean describe the graph of the function when N={whatever integer}? And what happens to the graph and to the value of the ...

*February 24, 2010*

**calculus II**

But how can you tell the limit?

*February 24, 2010*

**calculus II**

I have the function f(x)=e^x*sinNx on the interval [0,1] where N is a positive integer. What does it mean describe the graph of the function when N={whatever integer}? And what happens to the graph and to the value of the integral as N approaches infinity? Does the graph ...

*February 24, 2010*

**Math**

(A) y =x+3 (B) correct (C) correct

*February 21, 2010*

**Calculus**

But how did you arrive at "as N gets big this looks like e^x(-NcosNx)/N^2?????

*February 19, 2010*

**Calculus**

Now how would you describe the graph of this function when say N=5, N=10, and N=100? And what does it mean does the graph confirm the limiting behavior of the integral's value?

*February 19, 2010*

**Calculus**

I have the function f(x)=e^x*sinNx on the interval [0,1] where N is a positive integer. What does it mean describe the graph of the function when N={whatever integer}? And what happens to the graph and to the value of the integral as N approaches infinity? Does the graph ...

*February 19, 2010*

**Biology 201**

Life is sometimes described as a constant struggle against the second law of thermodynamics. How do organisms succeed in this struggle without violating the second law?

*February 14, 2010*

**biology**

compare and contrast the variety of amino acids with that of monosaccharides and fatty acids. Which group exhibits the greatest structural variability?

*February 11, 2010*

**Math**

Field Goals Free Throws --------------------------------------- Number: % : Number : % Taken : Made : Taken : Made ---------------------------------------Lions : 37 1/2%: : 20 : 55% 48 : : : Tigers: 45% : 18 : 66 2/3% 40 : If these are the results of a basketball game, what ...

*February 8, 2010*

**data management grade 12**

Cecile tosses 5 coins,one after the other. a) How many different outcomes are possible? b) In how many ways will the first coin turn up heads and the last coin turn up tails? c) In how many ways will the second third and fourth coins all turn up heads? d) would the same ...

*February 5, 2010*

**math**

You must divide the numerator by the denominator Example: 13/50= 13 divided by50 you would get 0.26 and that would be your answer!!!!!

*February 2, 2010*

**physics need help**

thanks, i finally got the right answer, i just needed to put more digits with the scientific notation. thanks bob

*January 29, 2010*

**physics need help**

this is not the right answer though. am i missing a step?

*January 29, 2010*

**physics need help**

C=(kAe)/d =[(25)(pi*.55^2)(8.85e-12)]/.0025 =8.41e-8 q1=CV =(8.41e-8)(1000) =8.41e-5 without dielectric: C=(Ae)/d =(pi*.55^2)(8.85e-12)/.0025 =3.36e-9 q2=CV =(3.36e-9) (1000) = 3.36e-6 q1-q2 =8.07e-5 C

*January 29, 2010*

**physics need help**

i tried that for the value of k of that material but i'm still not getting the right answer

*January 29, 2010*

**physics need help**

A parallel-plate capacitor made of circular plates of radius 55 cm separated by 0.25 cm is charged to a potential difference of 1000 Volts by a battery. Then a sheet of tantalum pentoxide is pushed between the plates, completely filling the gap between them. How much ...

*January 29, 2010*

**Physics**

what is the dielectric constant of tantalum pentoxide?

*January 28, 2010*

**Physics**

A parallel-plate capacitor made of circular plates of radius 55 cm separated by 0.25 cm is charged to a potential difference of 1000 Volts by a battery. Then a sheet of tantalum pentoxide is pushed between the plates, completely filling the gap between them. How much ...

*January 28, 2010*

**Biology**

Thank you - I'll take a look at that.

*January 21, 2010*

**Biology**

why is a radioisotope able to substitute for an ordinary (nonradioisotope) atom of the same element in a molecule?

*January 21, 2010*

**math equation**

it is already answered

*January 4, 2010*

**Chemistrt**

How many grams in 4.00 moles of Fe2O3? Answer 4 Moles Mass = 159.7 grams 4 X 159.7/1 = 6.388 or 6.39 grams. How do you get 6.39X102grams? Fe is +2 and O is –2. you have 2-Fe and 3-O why would this not be 6.39X10-2 grams

*December 6, 2009*

**biology**

1-Why is so much heat lost from, head, hands, feet? 2-Why would the body cool down at high altitudes regardless of outside temp? 3-Describe changes that occur as body tries to acclimatize to high altitudes? 4-Describe causes and effects of pulmonary edema and cerebral edemo? 5...

*December 6, 2009*

**Chemestry 095**

Complet and balance the following equation. F2 (g) + HCI (g) == ?? Which element or ion is oxidized and which one is reduced? Which one is the oxidizing agent and which is the reducing agent?

*November 29, 2009*

**Chemestry 095**

Write the electron configuration for the following ground state atoms and ions. strontium+2 ion; iron element; selenium -2 ion; gallium +3 ion; and tin element.

*November 29, 2009*

**chemistry**

Megan I'm in Mr. Hartzell's class are you?

*November 28, 2009*

**Math**

g of x=2x^2+x-10 Factor

*November 19, 2009*

**algebra**

12/a=4

*November 9, 2009*

**social studies**

I have to do an Essay on early history of new york state, how the Native American Indians, the Dutch, and the English have all made contributions to our culture today.

*October 25, 2009*

**Math**

What is 0 to the third power, or zero cubed?

*October 23, 2009*

**math**

what is the standard form of 200 thousands+50 tens+3 ones?

*October 19, 2009*

**physics - linear momentum with rockets**

This is not correct.

*October 16, 2009*

**Geometry**

Ok, I found a box and cut off the corners as stated, but it looks like an octagon now. (and not a very good one) Am I missing something?

*October 12, 2009*

**Geometry**

It sounds like it would look like a hexagon.

*October 12, 2009*

**Geometry**

If you marked the midpoints of the edges of a cube and sliced off all its corners through the midpoints of its edges, how many and what type of faces would the truncated figure have?

*October 12, 2009*

**Geometry**

Cool, thanks for the site!

*October 8, 2009*

**Geometry**

Which point of concurrency in a triangle is the point of intersection of the three altitudes of a triangle?

*October 8, 2009*

**12th grade chemistry**

thanks DrBob ..I appreciate the help. I have tried many searches for the answer on the internet and felt the answer was no as I found nothing.I understand the idea of going to CO2 and H2O. I also don't think that just an O molecule can be added. Thanks again.

*October 4, 2009*

**12th grade chemistry**

Thanks for your answer DrBob. I am still stumped.The question I was asked to answer is Do acetic acid and stearic acid undergo controlled oxidation reactions? Explain why/why not and draw an equation to illustrate the answer.

*October 4, 2009*

**chemistry 12th grade**

can carboxyl groups undergo controlled oxidation...why or why not??? thanks

*October 4, 2009*

**Algebra 1A**

I need help please!!! Translate to an inequality. The average speed, s, was between 130 & 140 mph. Translation 130 ? s ? 140. Thanks

*October 2, 2009*

**Algebra 1A**

Help!! solve 2.4x+22.0>55.0-8.6x the solution set is {x]x> ?}

*September 30, 2009*

**Algebra**

How do you turn 7/12 into a percent and what would be the answer???????

*September 14, 2009*

**writing**

How do you include songs in a sentence: Punctuation for the following: It seems only yesterday that she was a little girl in pigtails reciting Mary Mary Quite Contrary and sining Ill never forget it The Farmer in the dell in a funny high squeaky baby voice.

*September 3, 2009*

**US History**

What were the British and American military strategies and the war's major turning points?

*September 2, 2009*

**english rules 2 anwers**

rgaergaer

*August 6, 2009*

**Chemistry**

Thank you

*July 18, 2009*

**Chemistry**

Which of the following mixtures will result in the formation of a buffer solution if all solutions are 1.0 M before mixing? i) 100. mL of NH3(aq) and 100. mL of HCl(aq). ii) 100. mL of NH3(aq) and 50. mL of HCl(aq). iii) 100. mL of NH3(aq) and 50. mL NaOH(aq). iv) 100. mL of ...

*July 18, 2009*

**DRBOB222**

THANKS so much for all of your quick and useful help!

*July 16, 2009*