Friday

April 25, 2014

April 25, 2014

Number of results: 69,954

**Chem**

How can the concept of specific heat capacity of water be used to explain the heating and cooling patterns if the oceans and the climate on the planet?? Can someone please explain this to me it would really help a lot.
*Sunday, January 27, 2013 at 8:31pm by Emily*

**chem (urgent)**

Can someone please explain to me in simple terms what the eutectic point and temperature are?
*Friday, September 16, 2011 at 12:03pm by laura*

**Biology/Chem**

Can someone please explain how I would write the equation for the hydrolysis of lactose using structural formulae? Thanks.
*Tuesday, March 20, 2007 at 5:40pm by Confucious*

**Maths-can someone explain something to me???**

hey, can someone explain vectors to me? im soooooo lost, I don't understand them at ALL. please please please help me. :(
*Monday, February 18, 2013 at 12:48pm by Corie*

**AP CHEM**

A secondary alcohol results from the attachment of a hydroxy group to which carbon atom? C | <---GIVEN STRUCTURE C1-C2-C3-C4 A) C1 B) C2 C)C3 D)C4 Answer is C! I have to explain why, but the teacher never taught us anything about organic chem. So please explain!
*Friday, April 5, 2013 at 2:52pm by Anonymous*

**chem**

for 2Al2O3----> 4Al(s) + 3O2 the question is what is the heat change for the formation of 1 mol of aluminum oxide from its elements? Al2O3:-1676.0 O2:0.0 Can someone please explain how to complete this problem step by step please??
*Tuesday, January 22, 2013 at 6:08pm by sara*

**Chem**

How many sigma bonds are there in trypophan? I know the answer is 28 but I don't know how to get that answer. Can someone please explain?? Thanks!
*Friday, February 12, 2010 at 3:45pm by Lauren*

**Chem(PLEASE CAN SOMEONE EXPLAIN HOW I CAN SOLVE)**

calculate the molarities of each of the ions in a solution prepared by diluting 78mL of 4.5M Ca(ClO3)2 (aq) to 156mL with water. I dont understand how to answer this question.
*Wednesday, October 26, 2011 at 12:53am by amy*

**math 012 please help explain**

can someone please help explain how to do this problem. i have a previous posting where i tried to work the problem out, and someone tried to explain where i was confused, but im still confused. 4(2n+1)=3(6n+3)+1
*Sunday, February 1, 2009 at 5:28pm by amy*

**Chem**

2H2(g)+O2(g) ---> 2H2O(l) delta H= -572kJ/mole of O2 Calculate the amount of heat evolved when 10g of hydrogen are burned in excess oxygen. Can someone please explain step by step? =D
*Sunday, July 15, 2012 at 10:08pm by Shirley*

**Math SOmeone please please help**

Find the derivative of the function. g(u) = (5+u^2)^5(3-9u^2)^8 Could someone please explain the steps that would lead me to the answer? I'm completely stuck.
*Monday, February 21, 2011 at 11:15pm by Anonymous*

**Chem**

I dont understand how Rutherford's gold foil experiment proved that the positive charge of the atom had a very small volume in comparison to the whole atom. Could someone explain this to me please?
*Thursday, July 9, 2009 at 5:33pm by Lena*

**chem**

How many kilojoules of energy are released from the carbon carbon single bonds when glucose (C6H12O6) is burned??? i asked this before but i dont really understand it any better. can someone please explain it differently thanks
*Sunday, September 6, 2009 at 11:10pm by jake*

**chemistry**

can someone explain the leveling effect in chemistry or provide a good link please? in my chem book it says something like HNO3<H2SO4<HCl<HBr<HI<HClO4 but i dont get why they are greater/smaller
*Friday, August 5, 2011 at 2:15pm by Henry*

**chemistry**

so we did a chem lab and one of the questions is to tabulate the amount of S2O3 consumed in moles and times (sec) for each run. I'm just not sure how to calculate the amount consumed. Can someone please explain how?
*Saturday, February 1, 2014 at 10:40pm by Anonymous*

**Biology....someone who can explain something to me**

can someone explain the Miller-Urey Experiment to me? I've read it again and again and I just don't really get it. Please help me out here.
*Tuesday, February 5, 2013 at 9:08am by Corie*

**history/chem**

can someone briefly explain what did aristotle and what did plato contribute to chemistry?
*Friday, September 19, 2008 at 6:55pm by kelli*

**Chem**

Can someone explain in really simple terms the difference between Sigma and Pi bonds?
*Wednesday, June 18, 2008 at 10:52pm by Alex*

**math/ algebra 1**

can someone please help me explain how they got this answer and can someone please show me the steps into solving this question? Q: Four more than the quotient of a number and three is at least nine.
*Sunday, November 10, 2013 at 4:34pm by ellie*

**org. chem**

Can someone explain in simple terms the difference between hemiketal and hemiacetal? Just curious
*Monday, February 11, 2013 at 2:52pm by meghan*

**physics help please!!!**

The tires of a car make 63 revolutions as the car reduces its speed uniformly from 94.0 km/h to 58.0 km/h. The tires have a diameter of 0.88 m. What was the angular acceleration of each tire? And If the car continues to decelerate at this rate, how much more time is required ...
*Friday, March 26, 2010 at 12:59pm by Anonymous*

**HELP! PHYSICS LABS!!**

CAN someone please help me...I am so confused and I have little time left to do my assingment, please! I am freaking out! Please help me!! Can someone please explain why when the centripetal force increases, so does the radius, and why when Centripetal force increases, so does...
*Tuesday, October 2, 2007 at 9:28pm by Cooper-Nichol*

**algebra 1**

a number is less than one fourth of the sum of three times the number and four. can someone please explain to me how they got this answer and can someone please show me each step.
*Sunday, November 10, 2013 at 10:50pm by morgan*

**math(help)**

please help someone explain this please!! The length of a marathon is 138,435 ft.each stride,or step,by a particular runner is 3 ft long.does the number of strides the runner takes fit evenly into the length of the race?(EXPLAIN ANSWER PLEASE) --------------------------- IS 38...
*Thursday, November 21, 2013 at 9:50am by matt*

**Chem**

Use the following reactions to arrange the elements A, B, C, and D in order of their redox activity, from greatest to least. 2 A + B2+ --> 2 A+ + B B + D2+--> B2+ + D A+ + C -->No reaction 2 C + B2+ --> 2 C+ + B Can someone explain? thanks
*Sunday, May 8, 2011 at 6:08pm by Rebekah*

**math**

Can someone please help with solving compound inequality. !.) 6x-4<-34 or 3x+10>10 2.) -2<=2x-4<4 I'd appreciate if someone can explain not looking for just answer. Thank you
*Sunday, August 26, 2012 at 5:30pm by brandon*

**Urgent need help on chem please someone**

A researcher explores the ideal gas equation. He measures the pressure of a system at different temperatures ( keeping the volume and moles of the gas constant) and creates a plot of P versus T. What is the slope of the line that results if the volume is 1.0L when 1.0 mol of ...
*Thursday, January 31, 2013 at 9:32pm by Kim*

**Science- Chemistry**

Could someone please explain a few things? First off, how do you change a normal compound or element and change it to an ion? And second, could you please explain the net ionic equations?
*Wednesday, February 11, 2009 at 6:14pm by Mme. Bella*

**physics - please explain further**

Can someone please explain the answer I got for a question I previously posted on this page? I don't understand the solution I was given and even when I try it, I'm not getting the right answer.
*Tuesday, April 21, 2009 at 7:18pm by Lucy*

**Math Help**

could someone please give me an example not an example using coins, marbles, spinner, like something different that would explain the difference b/w theoretical and experimental probability. And please explain.
*Thursday, March 20, 2014 at 7:42pm by Annie*

**Algebra, explain how to please**

Can someone explain to me how to solve -14=2/5(9-2b) It would be greatly appreciated thank you
*Sunday, October 17, 2010 at 8:15pm by June*

**Algebra, explain?**

So I have to solve this problem 9a=6(a+4) And then I wrote down: 9a=6a+24 but I don't know what to do from there, can someone explain to me please?
*Monday, October 18, 2010 at 2:43pm by Allyson*

**math**

i was doing the mean theorem for this problem: (x+4)^2 (x-3) on [-4,3] i got to: 3x^2 + 10x-8=7 someone helped me out and told me the answer was (-5 +/- sqrt(70))/(3) but i don't know how to get to there, can someone please explain to me how to get to this point?
*Wednesday, January 29, 2014 at 12:35am by eric*

**chemistry**

Can someone please explain the behavior of HCl/NaOH mixture as to why it started bubbling/dissolving when combined with Mg and with NH4Cl and why when blue litmus paper was dipped in the HCl/NaOH mixture it turned red. Also can someone explain the correct behavior that is ...
*Sunday, March 22, 2009 at 8:09pm by PZT*

**chem**

Can someone show me the structural formula (lewis diagram) for ethene??? Please
*Wednesday, March 31, 2010 at 2:39pm by Stacey*

**Chem**

Can someone explain the difference or how to tell between internal/external standard, standard addition and how it relates calibration standards?
*Tuesday, December 13, 2011 at 11:25pm by Ano*

**12 Biology! URGENT!**

Can anyone please explain how LH affects estrogen and progesterone? I tried searching the internet and I don't understand, so can someone EXPLAIN it to me in words? THANKS!! THANKS!
*Tuesday, May 13, 2008 at 9:50pm by Kyliyok*

**History please help**

Could someone explain what does it mean to "stabilize international exchange rates"? I would really appreciate it if someone wrote a brief explanation, because I just don't understand
*Monday, October 25, 2010 at 8:27pm by Amy*

**Simple Chem O2 **

What is O2 mean? Also what is oxygen gas the formula? Please could someone answer this?
*Wednesday, June 2, 2010 at 9:21pm by A*

**8th grade math**

I need someone to explain how to solve equations with two variables and tell me what the formula or equation is? Please help and explain. Thank you!
*Thursday, March 1, 2012 at 9:36pm by saranghae12*

**Chemistry**

Please can someone help explain the following: Explain the kinetics of combustion as a complex free radical process using hydrogen fuel.
*Saturday, May 5, 2012 at 11:53am by Kitty*

**Emission Spectrum of hydrogen ...CHEM**

Can someone please explain the emissiom spectrum of hydrogen? THose lines represent the energy released by the electron when going from one orbital (energy level) to a lower orbital. The difference of energy levels exactly corresponds to the energy in the light photon.
*Saturday, May 12, 2007 at 8:09pm by Pet*

**Human resource**

Can someone explain me this question: explain how and to what extent THE CONCEPT OF PEOPLE HAS CHANGED OVERTIME ,HENCE,HIGHLIGHTING THE EVOLUTION AND GIVING PRACTICAL EXAMPLES TO ILLUSTRATE YOUR ANSWER. am new to this module and can someone pls explain that question to me!
*Monday, February 20, 2012 at 10:29am by pallavi*

**Honors Chemistry**

Can someone please explain to me how to use the stock naming system when naming chemical/ionic compounds? I reeeeaaaally do not get it. Here's some examples: 1. CaCO3 ==> I know the answer is calcium carbonate, but how is it that answer? 2. FeSO4 ==> The answer is ...
*Monday, October 19, 2009 at 11:40pm by Emily*

**History**

Can someone help me find some polls or info on the original LAPD SWAT officers who were wounded and killed in action from the late 1960s-1982 please. And can someone explain to me what anti-SWAT opinions are as well as pro-SWAT opinions please.
*Monday, May 21, 2012 at 10:01pm by Anonymous*

**Chem ap**

What happens to cell potential as temperature decreases? Please explain
*Sunday, April 3, 2011 at 1:56am by boots*

**english**

can someone explain how to use the word serenity in a sentence? examples please? Would you say someone is filled with serenity?
*Tuesday, December 11, 2007 at 8:54pm by Anonymous*

**Can someone Explain this(math)**

34, 36, 43, 46, 47, 48, 48, 52, 53, 54 Box And whisker Plot I Don't Understand these at all can someone Explain without totally giving me the answer?
*Friday, February 21, 2014 at 12:18pm by julie*

**science question?**

can someone explain to me?? can someone explain the economic impact of wind energy on an area
*Monday, March 24, 2014 at 3:26pm by matt*

**Economics**

Can someone please explain what factors affect a country GDP? Also, if Thailand has a GDP of 4.5% and Australia has a GDP of 2.8%, please explain which country has a better economy. Thanks for your help
*Saturday, September 8, 2007 at 8:39am by Nat*

**MATH**

calculate missing dimension. a) cylinder has volume 1m3 and height of 0.6m. How do I fifure the missing dimension. Could someone please provide me with a formula to figure this out. Also can someone please explain to me step by step how to do this. Cause it takes me a long ...
*Tuesday, September 28, 2010 at 6:51pm by Anonymous*

**HELP Please. Geography.**

I found some links for the geological history for the appalachian mountains BUT it confuses me. Can you please simplify the formation of the Appalachian mountains?? please? thanks. Basically the mountains were created due to the merging of the continents into Pangea. I know ...
*Monday, April 23, 2007 at 6:18pm by Sasha*

**AP U.S History**

Can someone please explain what Federalism is? I don't quite get it yet. Please be specific.
*Saturday, October 18, 2008 at 3:20pm by Chloe*

**Chemistry**

Could someone please explain the concept of electromagnetic radiation to me please? Thank you!
*Wednesday, October 29, 2008 at 9:09pm by Marie*

**algebra help please**

add and simplify 1. a^2/2 + 3a^2/8 2. 4c/15 + 8c/25 i need help can someone explain please
*Monday, February 10, 2014 at 9:46pm by Sadie*

**science chem**

give one example of two elements that would be placed incorrecty if they were in order of their relative atomic masses. and explain why placing these two elements like this would not be correct. Pleasw could someone help me. Co/Ni is one. Ar/K is a second one. I will leave it ...
*Tuesday, May 1, 2007 at 3:20pm by sam*

**grade 9 math **

Can someone please help me solve this equation. And please explain how to break this down. 4b-6+b-9= 0
*Tuesday, April 12, 2011 at 7:45pm by brooke*

**Chemistry Help Please**

Which of the following is the strongest reducing agent? a) Li+ b) Zn c) Sn d) H2 Is it Li? Can someone please explain what the answer is and why?
*Thursday, May 9, 2013 at 2:48am by scilover*

**Math**

Can someone help me please 5-2x is greater than or equal 7 I get x can be greater than or equal to -1 Or x can be less than or equal to 6 And to graph i puta closed dot on -1 and 6 but it keeps saying im wrong i dont understand how im wrong, can someone explain why please ...
*Saturday, March 17, 2012 at 7:48pm by Amy*

**Chem**

Can someone please check this for me? It's ranking the following bonds in order of increasing ionic bond character. Cl-Cl C-H H-Cl Mg-C H-O Na-Cl Ca-O Cs-F I'm not sure where Fe-O, and Fe-C fall. Thanks -MC
*Wednesday, February 19, 2014 at 8:07pm by mysterychicken*

**Algebra**

Can someone please tell me what the domain of the following equation is? Please explain how you got that answer. g(x)=5^x
*Sunday, December 7, 2008 at 4:36pm by Sophia*

**CONFUSING QUESTION PLEASE HELP**

Which of the following is the strongest reducing agent? a) Li+ b) Zn c) Sn d) H2 Is it Li? Can someone please explain what the answer is and why?
*Thursday, May 9, 2013 at 11:46pm by scilover*

**Environmental Science**

Can someone please explain to me what SEMASS stands for? I googled SEMASS acronym but no site was able to explain what it means and why it's significant.
*Friday, February 26, 2010 at 11:47am by Andrea*

**Chemistry**

Please can someone help me to explain or find me some material where i can study related to these 2 questions: 1.Analyse the spectrum of 1-methylstyrene. 2.Explain the formation of gaseous and solid state PCl5 from its IR and Raman spectra.
*Saturday, January 19, 2013 at 12:13pm by PhysicalChemistry*

**Chemistry. help please**

Could a Bronsted-Lowry acid not be an Arrhenius acid? Explain. Could someone explain the answer to me?
*Monday, May 24, 2010 at 9:37pm by Ana*

**org. chem.**

Explain how caryophyllene fits the isoprene rule. I don't know how to explain this. I do know the isoprene rule is (C5H8)n, where n is the number of isoprene units. Please help.
*Monday, November 9, 2009 at 11:37pm by CMM*

**CHEM AP please help!!**

Using Heisenberg's uncertainty principle, calculate the uncertainty in the position of the following. a 1.32-mg mosquito moving at a speed of 1.61 m/s if the speed is known to within ± 0.01 m/s i tried every way and still cant get it..please someone help
*Sunday, October 23, 2011 at 10:37pm by Karina*

**english**

Can someone explain thoroughly what EFL learners get from the task where they have ti put new words into context?Can someone explain this stategy?And also another strategie - using linguistic clues
*Sunday, December 21, 2008 at 1:12pm by lily*

**Evolutionary Bio**

I was wondering if someone could explain to me how two haploid mating types can form a diploid. Also could someone explain the haplodiplontic life cycle? I would very much appreciate it.
*Tuesday, October 30, 2012 at 8:08pm by Ezra*

**Chemistry**

What would happen if too much refrigerent was present in the system(refrigerator)? Too little? HELP!!! I'm doing a C^3 assignment for chem and its due tomorrow can someone help me please!
*Thursday, November 7, 2013 at 10:24pm by K- High Anonymous*

**Chemistry**

What would happen if too much refrigerent was present in the system(refrigerator)? Too little? HELP!!! I'm doing a C^3 assignment for chem and its due tomorrow can someone help me please!
*Thursday, November 7, 2013 at 10:26pm by K- High Anonymous*

**Chemistry**

What would happen if too much refrigerent was present in the system(refrigerator)? Too little? HELP!!! I'm doing a C^3 assignment for chem and its due tomorrow can someone help me please!
*Thursday, November 7, 2013 at 10:50pm by K- High Anonymous*

**Algebra one help please?**

Find the missing coeffectient in the equation of the line. -4x+by=10 that passes through (2,3) Could someone explain please.. Thanks.
*Thursday, December 9, 2010 at 4:37pm by Allyson*

**8th grade math**

y=1/4x-1 1/2y=x-2 2x+3y=3 3y=5-2x 4x-y=3 4x=y=1 I don't understand this can someone please help me! This is Systems of Equations please work out the problem and explain it how to do it.
*Thursday, February 16, 2012 at 9:34pm by Austin*

**NEED HELP PLEASE**

The websites are confusing! Can someone please explain what a revenue variance is? I want to do my homework for a spreadsheet I downloaded. I just need the definition, please.
*Monday, May 17, 2010 at 12:27am by Donna needs help*

**chem**

un-ionized aspirn molecules can readily penetrate the stomach lining into a region of less adicity. This is where the stomach irritation associated with aspirn occurs. Use Le Chatelier's principle to explain why irritation occurs in this area. Could someone explain the ...
*Monday, July 27, 2009 at 3:26am by Lena*

**Economucs**

Will someone please explain me the self-regulating nature of a marketplace? I read my text but it made me more confused...so please help!!!
*Thursday, September 3, 2009 at 11:41am by Anonymous*

**Math Help Please**

Would someone please be kind enough to explain steps for this one. Thank you. If m and n are positive integers and m is 250% of n, what percent of m is 2n?
*Monday, February 27, 2012 at 5:54am by Help Please*

**Chem**

Could someone explain to me how to prepare (a) zinc chloride by an acid-base reaction and (b) by a gas formation reaction. If the starting materials available are ZnCO3, HCL, CL2, HNO3, NaCL, Zn(NO3)2, and Zn. Thanks so much for any info.
*Tuesday, December 2, 2008 at 3:38am by Tiff*

**Algebra - Rational Exponents**

Can someone explain the rules for raising a power to a power? Please explain and give some examples. I would appreciate it if you can answer this as soon as possible.
*Wednesday, February 12, 2014 at 10:45pm by Brady*

**chem**

how do you find the number of electrons in an ionic compound chart, if you haven't been given the charge? Would someone be able to please tell me? thanks
*Monday, March 9, 2009 at 7:27pm by micah*

**chem**

what is the Ka for a 0.1994M propionic acid solution if pH is 2.795? CH3CH2CO2H(aq)+H2O(l)<->CH3CH2CO2-(aq)+H3O(aq) someone please help.. I have a final in two days.
*Monday, May 10, 2010 at 9:48pm by manda*

**reply+chemistry please**

can someone reply to my last chem post
*Wednesday, February 4, 2009 at 12:39am by Chopsticks*

**Calculus**

can someone please explain h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 7 0 4 1 1 4 5
*Saturday, October 31, 2009 at 11:45pm by Calculus*

**Calculus**

can someone please explain h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 7 0 4 1 1 4 5
*Sunday, November 1, 2009 at 12:14am by Calculus*

**algebra**

[-4b-8]+[-1-b^2]+2b^3; b=-2 please can someone explain
*Tuesday, September 4, 2012 at 12:25pm by brandon*

**algebra**

9[9-8x]=2x+3 Please can someone explain
*Tuesday, September 4, 2012 at 12:26pm by brandon*

**algebra**

could someone please explain to me how -5/8 + 1/4 = -3/8? I have several more of these problems -5/8 + -1/6 = -19/24, and more. I have no reference in my text on how to do these. Can someone take me through the steps?
*Saturday, April 23, 2011 at 6:01pm by aria*

**algebra**

Can someone help with inverse relations and functions? is relation t a function? Is the inverse t a function? chart looks like: x 0 2 4 6 y -10 -1 4 8 If someone could please explain this problem
*Monday, December 10, 2012 at 12:15am by lee*

**adult education**

I need help with someone to go over my eassy with me can someone please help me.This is my first time using this site so I don't know how it really works SOMEONE PLEASE HELP ME!!
*Wednesday, October 27, 2010 at 5:02pm by jennifer*

**Chem.**

How would you adjust the instrument for GC analysis to get better resolution? Please discuss. What is another GC detector and explain how it works and what sampler it is good for.
*Monday, November 2, 2009 at 10:37pm by Chelsea*

**chem**

Oh Dr.BOB...I am so lost..and sooo frustrated. Can you explain to me how to balance a chemical equation one more time please. Thanks Stacey
*Tuesday, May 11, 2010 at 9:59pm by Stacey*

**math ergent please please...**

Explain how to find the equation of the vertical asymptotes of a reciprocal function in full details. * Steve told me to look up in the web, and did, but still i couldn't find the correct one. someone help please....
*Monday, December 2, 2013 at 12:54pm by Thaya*

**English- A little help please**

I am doing my plot summary on the Book Royally Jacked and I really want to know the significance of this title towards the book. I can't seem to explain it well. Royally stands for the royal family in this book whom Valerie and her dad are staying with. I just can't seem to ...
*Monday, June 14, 2010 at 10:27pm by Sara*

**religion,help**

How do contemporary Buddhist practices reflect the foundations of the religion? can someone explain to me what does this question is asking or help me out because i've tried answering it in previous postages. but i just don't understand. please someone help me i fugured it out
*Thursday, January 11, 2007 at 10:10pm by kailin*

**algebra**

-(4h-1)/1+h; h=2 the 4h-1 is on top of 1+h please can someone explain
*Tuesday, September 4, 2012 at 12:28pm by brandon*

**algebra**

what is the solution 1/2x^2-x+5=0 could someone please explain
*Saturday, November 3, 2012 at 11:18am by Lee*

**Dr. Bob**

Dr. Bob, can you please tell me if I did my chem questions right... they have been sitting down there all day and all i need is someone to check if they are right please and thank you
*Tuesday, February 19, 2008 at 12:35am by Lauren*

**Maths- very very simple**

can someone tell me what the title of this proof is? a^2+b^2=c^2 im writing a paper on the Pythagorean theorem and this is the proof I would use to explain it to someone but idk the name of it. PLEASE help me out here.
*Thursday, February 14, 2013 at 5:49pm by Corie*

**Pre-Algebra**

what is the surface area of a square pyramid if the slant height is 15.2 m and the base is 15.2 m? please explain it to me. this is not homework, it is a practice question and I do not understand how to solve it. Someone PLEASE help!
*Thursday, February 20, 2014 at 2:12pm by #1Student*

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