Thursday

April 24, 2014

April 24, 2014

Number of results: 575

**Science-bobpursley**

Thanks for helping me with al those parts bobpursley. If you have time, can you also check my questions please. Thank you very, very much in return. My post is on the second page.
*Tuesday, April 6, 2010 at 9:49pm by Sara*

**physics-bobpursley/drwls please check**

bobpursley/ drwls please help me with my post on Sunday, April 15 at 10:16pm and 10:19pm. Thanks!
*Monday, April 16, 2007 at 7:24am by Mary*

**Math CONTINUATION OF QUESTION FROM bobpursley**

Thank you for answering the question before bobpursley, I understand how you did the deriv of inside, outside, but how do I now do the second derivative since you have the extra -18x^2 in the numerator?? Thank you very much! (I suppose I have to brush up on my derivatives) ...
*Thursday, March 10, 2011 at 9:05pm by KIKSY*

**algebra 2**

How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and compute f(-2) algebra 2 - hellogoodbie, Saturday, January 16, 2010 at 1:47pm so is the answer f=21/2? if that is right, thank you ...
*Saturday, January 16, 2010 at 2:04pm by hellogoodbie*

**algebra 2**

How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and compute f(-2) algebra 2 - hellogoodbie, Saturday, January 16, 2010 at 1:47pm so is the answer f=21/2? if that is right, thank you ...
*Saturday, January 16, 2010 at 2:59pm by hellogoodbie*

**Reiny or Damon or Bobpursley **

Express the series 11 + 18 + 27 +...+ 171 using sigma notation. Usually you would take 27-18 and thats the step between numbers, right? (I think its the k-value?) But 27-18=9 and 18-11=7. Are we stepping by k+2 here? Like k, k+2 k+4, k+6...? Please help me. I'm not confident ...
*Friday, April 27, 2012 at 6:09pm by Tabby*

**acceleration estimate(bobpursley)**

Well, bobpursley explained this to me. I didn't understand this well. Since there was an error in the data, I am posting it again t(sec) v(ft/sec) 1 12.2 1.5 13 2 13.4 2.5 13.7 velocity of an object moving along a line at various times. How do I estimate the object's ...
*Monday, December 11, 2006 at 10:31pm by Jen*

**Physics**

A vertical spring with a spring constant of 450 N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by 3.0 cm in bringing the block to a momentary...
*Friday, April 6, 2007 at 8:42pm by Mary*

**Chemistry!! - bobpursley please**

Calculate the maximum wavelength of light capable of removing an electron for a hydrogen atom from the energy state characterized by the following when n=4 =__________nm Responses Chemistry!! - bobpursley, Wednesday, October 22, 2008 at 4:05am So the two energy states are n=4 ...
*Wednesday, October 22, 2008 at 6:40pm by Giznelbell*

**algebra 2**

Posted by hellogoodbie on Saturday, January 16, 2010 at 3:24pm. Posted by hellogoodbie on Saturday, January 16, 2010 at 2:59pm. How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and ...
*Saturday, January 16, 2010 at 4:03pm by hellogoodbie*

**physics repost bobpursley**

The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what? Responses * physics - bobpursley, Monday, June 22, ...
*Monday, June 22, 2009 at 10:48pm by jane*

**eth**

how do you think slavery influenced the evolution of both black and white america today? is there any websites that might help me with this question? As I was starting to answer your question, I had a conversation with BobPursley. He has summed this answer up better than I ...
*Tuesday, September 12, 2006 at 2:43pm by jenny*

**Physics, still don't get it!**

I'm sorry bobpursley I don't understand your response, please clarify. When an object of mass m1 is hung on a vertical spring and set into vertical simple harmonic motion, its frequency is 12 Hz. When another object of mass m2 is hung on the spring along with m1, the frequency...
*Friday, April 6, 2007 at 2:56pm by Mary*

**bobpursley**

thank you. :)
*Monday, January 1, 2007 at 8:17pm by jasmine20*

** TO BOBPURSLEY**

CAN YOU HELP ME IN ETHNICS
*Thursday, November 2, 2006 at 8:51pm by MINEMINE*

**Math**

Thank you Bobpursley
*Thursday, September 10, 2009 at 7:29pm by Sam*

**physics**

thank you bobpursley
*Tuesday, September 21, 2010 at 5:14pm by john*

**to bobpursley**

thank you so much!
*Wednesday, April 18, 2012 at 8:55pm by Celest*

**Chem- bobpursley**

What mass of protons would be required to just neutralize the charge of 1.5 g of electrons? my teacher said .0015kg times 1e-/.00091e-27kg times 1pt/1e- times 1.67262e-27 over 1 p chem - bobpursley, Tuesday, September 21, 2010 at 6:48pm That is what I would do also. But I ...
*Tuesday, September 21, 2010 at 8:39pm by Sara*

**chemistry-mostly for bobpursley- I have a question**

ok i made a post with this question earlier: A carbon nucleus has six protons and six neutrons. How many electrons would it take to equal the mass of a carbon nucleus? u responded with this formula: 6*massproton+6*masscarbon=n*masselectron look up the three masses, solve for n...
*Monday, September 20, 2010 at 5:44pm by Sarah*

**bobpursley**

Thank You very much.
*Friday, March 28, 2008 at 7:59pm by Ella*

**TO BOBPURSLEY**

I have responded
*Sunday, September 13, 2009 at 9:38pm by AP Physics B*

**Honors Chem B**

Thank you bobpursley!
*Thursday, September 1, 2011 at 9:23pm by Deahna*

**to bobpursley**

is this the correct answer: 2m^-8n^-2/9m^2n^-6??
*Sunday, September 8, 2013 at 8:30pm by Sophie*

**algebra 2**

Posted by hellogoodbie on Saturday, January 16, 2010 at 2:59pm. How is this problem done? IF f(x)=2x^2-8x-3 FIND f(-2) algebra 2 - bobpursley, Saturday, January 16, 2010 at 1:42pm Put in for x the value -2, and compute f(-2) algebra 2 - hellogoodbie, Saturday, January 16, 2010...
*Saturday, January 16, 2010 at 3:24pm by hellogoodbie*

**bobpursley**

I revised my answers below. Thank you
*Sunday, April 6, 2008 at 3:45pm by Jon*

**english**

bobpursley, but can you give me an example
*Sunday, February 21, 2010 at 12:25pm by Ruth*

**bobpursley**

Can you please answer my last post? Thanks -MC
*Saturday, March 20, 2010 at 7:44pm by mysterychicken*

**child care**

thanks bobpursley ok 6 is not b so i think is a? and 20 if its 25-30% its b?
*Monday, December 13, 2010 at 2:40pm by tiffany*

**Mr. bobpursley**

Thank you for your time and frankness. I agree with you.
*Sunday, September 4, 2011 at 6:42pm by Ben*

**BOBPURSLEY LOOK AT MY OTHER ?I REPLIED**

yeah
*Sunday, January 28, 2007 at 12:31pm by margie*

**Thanks BobPursley!**

Thank you so much for all of your help! I understand now!!! : )
*Thursday, February 1, 2007 at 9:51pm by Milford*

**science (bobpursley)**

what about flooding? is that one.
*Friday, October 10, 2008 at 9:43pm by scooby91320002*

**Physics**

bobpursley can you show the equasions you are using
*Sunday, January 8, 2012 at 5:44pm by Rick*

**Algebra 2 ..........BOBPURSLEY**

SO IF Y=0 what would x be on the graph. Please.. i do not get this...
*Saturday, January 26, 2013 at 7:58pm by Anonymous*

**msg bobpursley**

thanks for your help on the newspaper question.it was a really big help
*Saturday, October 11, 2008 at 8:51am by nathan*

**bobpursley**

ok and for this other question could you check my work please! h t t p : / /i 3 4 . t i n y p i c . c o m / s 2 z h m v . j p g
*Wednesday, October 15, 2008 at 9:55pm by Claudia*

**Bobpursley plz help**

Can you please check my answers 3. Tx=2x+1,XW=x+7;TW Tx+XW=TW 2x+1+x+7+TW 3x+1+7=TW Answer: 3x+8+TW 4. WX=X+5,TW=4x+5;TX WX+TW=TX x+5+4x+5=TX 5x+5+5=TX 5x+10=TX
*Monday, August 24, 2009 at 8:27pm by Chrissy*

**Earht Science **

To bobpursley, the half life is 40.(potassium 40)
*Wednesday, May 9, 2012 at 1:25pm by Christine*

**to: bobpursley**

please help me with the last question, are the others all correct?
*Sunday, September 8, 2013 at 8:22pm by Sophie*

**Art. bobpursley**

Thanks Bob, your answer made sense. x Nao x
*Thursday, September 7, 2006 at 2:06pm by Anonymous*

**Please bobpursley help.algebra 2**

This is a critical question.. Why does y=3 represent a function and x=3 does not
*Monday, August 27, 2007 at 8:46pm by logan*

**for bobpursley please check**

ok So The American Association of Labor legislation did what then n
*Sunday, January 20, 2008 at 8:35am by Michalea*

**blood ex.**

Can you be more specific, bobpursley? I researched hydrogenase and Im not sure what to do...
*Monday, November 17, 2008 at 8:04am by VICTOR*

**BobPursley**

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 7 9 9 0 5 6 1 4 well it's on this page just CTRL+F Kate you can post here if you want thanks!
*Friday, July 23, 2010 at 8:54pm by Kate*

**Physics Help me Someone plz**

If a galaxy is traveling away from us at 2.0% of the speed of light, roughly how far away is it? t= light years I got 2.4x10^8 light years but its wrong please help me out...thank you Physics Plz help me - Anon, Monday, May 6, 2013 at 9:17pm 5.98x10^6 Thatz still wrong Physics...
*Tuesday, May 7, 2013 at 6:50pm by Leila*

**Bobpursley+Chemistry**

Hey Can you take a look at my previous post that you replied on.
*Wednesday, January 14, 2009 at 6:26pm by Chopsticks*

**bobpursley**

like what are the steps to getting into a hospital is what prehospital means
*Thursday, April 1, 2010 at 9:29am by jerson*

**Algebra(repost of one question)**

Bobpursley: 89. Solve for x in the equation: (6/7)x - 6 = -2 I got x=28/3
*Saturday, May 1, 2010 at 10:21pm by y912f*

**BOBPURSLEY PLZ FINISH HELPIN ME W/MY OTHER PROBLEM**

BASICALLY WHAT THE TITLE SAYS!
*Monday, November 6, 2006 at 8:33pm by SANDRO!*

**bobpursley**

ok heres my work for one of the questions. sorry is taking long to upload them. h t t p : / / i 3 7 . t i n y p i c . c o m / 2 n k 4 9 7 c . j p g
*Wednesday, October 15, 2008 at 9:29pm by Claudia*

**bobpursley**

2 3/5 = 6c 13/5= 6 You said to divide both sides by six can you show me an example please? Thanks!
*Monday, January 12, 2009 at 5:08pm by Payge*

**come back bobpursley**

i'm hoping you have my answer - i'm still working on it though
*Sunday, March 15, 2009 at 7:53pm by jesse*

**algebra**

For this problem a/a-1- a-1/a=4 . Is the answer a=1 1/2. I solved it by multiplying a(a-1) both side as suggested by bobpursley. thanks
*Sunday, August 30, 2009 at 12:39pm by Brian*

**chemistry**

Sorry bobpursley for the multi post< i kept posting it wrong. thanks for yur help
*Tuesday, October 6, 2009 at 2:16pm by Tierney*

**Science (bobpursley) **

Why is an extra day added to February every four years?
*Tuesday, May 14, 2013 at 9:51pm by Anonymous*

**Physics-bobpursley please check**

This is the question I posted about two hours ago and I worked it out two ways-could you scroll down and check it, please?If I have a roller coaster, and hill 1 height is 50cm and hill height 2 is 25 cm and the PE is .9 as it approaches the top of hill 2, how do I calculate ...
*Thursday, November 4, 2010 at 9:18pm by Joey*

**Question For Bobpursley!**

Can you give me some examples for how to solve quadratic equations? It would really help!
*Wednesday, April 1, 2009 at 7:16pm by Cody*

**bobpursley**

Can you please answer my post? I haven't been getting mine answered lately... Thanks -MC
*Tuesday, March 23, 2010 at 12:41pm by mysterychicken*

**Caclulus, bobpursley HELP!**

Sorry for bothering you on this one question but I just replied to my original problem if you could help me with that.
*Tuesday, September 21, 2010 at 9:39pm by Leanna*

**algebra**

This is a response to bobpursley's answer of Pr(0) = .3; Pr(1) = 7*.3; Pr(2) = 7*.7. Can you show me how you arrived at the above answers? Also, what does * mean? Thanks.
*Sunday, January 2, 2011 at 2:47pm by bree*

**Geometric Series (bobpursley)**

Could you please check my same post again, I had another question.
*Monday, September 19, 2011 at 8:53pm by Anonymous*

**to bobpursley**

if i was going on the same web you gave me and i wanted to study there,but if its a different book, what do i type in?
*Thursday, May 3, 2012 at 7:59pm by Celest*

**PHYSICS, still cant get it**

A man (weighing 915 N) stands on a long railroad flatcar (weighing 2805 N) as it rolls at 18.0 m/s in the positive direction of an x axis, with negligible friction. Then the man runs along the flatcar in the negative x direction at 40.00 m/s relative to the flatcar. What is ...
*Tuesday, February 27, 2007 at 9:59pm by COFFEE*

**physics- response to bobpursley**

which is false? Consider the following processes: I. Energy flows as heat from a hot object to a colder object II. Work is done on a system and an equivalent amount of energy is rejected as heat by the system III. Energy is absorbed as heat by a system and an equivalent amount...
*Wednesday, June 24, 2009 at 8:48pm by matt*

**to bobpursley**

In my heads/tails question- why isn't it 1/6? I flip a coin three times, aren't there only 6 possible outcomes?
*Tuesday, December 1, 2009 at 4:23pm by Brian*

**To: bobpursley**

Can you please check my other science posts as well. They are still on the 1st page, thank you very much:-)
*Thursday, April 8, 2010 at 8:41pm by Sara*

**physic please check answers test tommoro**

bobpursley did i do the math problem right if not could u do it for me .thanke
*Monday, June 4, 2012 at 4:52pm by lisa*

**Math+ confused?!**

I had to solve for this: 1) choose 4 people from a class of 12 My answer: n=12 r=4 12C4 = 495 2) chosse 8 people from a class of 12 my answer: n=12 r=8 12C8 = 495 why is it that they both eqaul 495? maybe I am doing it wrong but I am confused why do they both equal 495? They ...
*Tuesday, May 15, 2007 at 2:11pm by Math*

**physics Again**

bobpursley can you please check my reply to your post about my question? I am not sure if I did my equation correctly. Thanks
*Wednesday, September 12, 2007 at 6:55pm by Haley*

**bobpursley!**

Sorry again but I have two questions. Is this right? 1/5 m= 22 final answer m= 11/55. Seconde how would I do 2/3c = 5.9 Thank you so much!
*Monday, January 12, 2009 at 5:31pm by Payge*

**math**

bobpursley, I am confused to the equations that you have just posted. However, this is what I figured out but I'm not if it's correct. ((25+R)-B)+3N=435
*Thursday, October 1, 2009 at 9:46pm by abby*

**bobpursley**

write the equation of the ellipse with foci at (0, -sqrt3) and (0, sqrt 3) and for which 2a=4 i've done this befoe, but with squareroots as endpoints. and if 2a=4, a=2, right? Please help me.
*Friday, April 20, 2012 at 4:29pm by Tabby*

**to bobpursley**

I don't understand any of the information you gave me to solve the problem. Ok, write the two equations ( I did one). Now graph them. Where do they cross?
*Sunday, December 10, 2006 at 11:37am by Joeis*

**bobpursly**

Ok so I am still coming up with problems is it possible for bobpursley to answer this: why does Centripetal force increase with frequency, and same with radius? Thanks for the help
*Tuesday, October 2, 2007 at 10:32pm by Amandamac*

**bobpursley -science**

sorry my question is explain simply why aluminium is cheaper than gold with reference with the reactivity series. thanks again for your help
*Monday, September 27, 2010 at 12:29pm by Helena*****

**physics**

Bobpursley; you helped me with my question and I am a little stuck how would I find distance if I dont know time and vice versa?
*Thursday, October 6, 2011 at 12:01pm by Anonymous*

**SAT score**

bobpursley you were right. i had gotten my scores by email in exactly 21 days, but i hadn't checked it. i got a 1570
*Tuesday, November 3, 2009 at 3:34pm by y912f*

**Science (bobpursley)**

Does mass increase or decrease when the distance stays the same and the force of gravity between two objects decreases?
*Wednesday, May 15, 2013 at 10:54am by Anonymous*

**Physics- drwls please check**

Good morning. This is a repost. The system is telling me my calculations is incorrect. I thought a fresh pair of eyes would help. Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a ...
*Thursday, April 19, 2007 at 9:06am by Mary*

**chem -repost for bobpursley**

i don't know how to solve this. looked through all my notes but i'm not sure what kind of formula i am to use or if i even need one! please help me to understand the theory behind this: "calculate the work need to make room for the products in the combustion of S8(s) to SO2(g...
*Sunday, April 17, 2011 at 8:53pm by please, help me *

**Physics - Repost**

I am reposting the this question. Find the current in the 10.0 ohm resistor in the drawing (V1 = 21.0 V and R1 = 27.0 ohms). The drawing is in the shape of a rectangle that has one straight line down the center. On the left top line is R1; on the right top line is 5.0 ohm; on ...
*Tuesday, September 11, 2007 at 11:18pm by Jim*

**DEATH OF a salesman!**

Why is it significant that Bernard is married with two children? His statistical avarageness Thanks! Doesn't it provide a foil to Biff? yep! bobpursley you are right!
*Wednesday, November 1, 2006 at 8:45pm by Willy!*

**ms.sue , religion**

thanks to you and bobpursley so am i doing better than last time. i'm really trying here. Yes. You're doing great! I think you're beginning to understand Eastern religions! Fantastic! :-)
*Wednesday, January 17, 2007 at 9:29pm by kailin*

**Chem?**

hi, i posted a question below under the same name and no one has answered it yet (i think bobpursley might have left) any help?
*Sunday, December 14, 2008 at 6:51pm by Chris*

**physics**

A car weighing 9800 N travels at 30 m/s. What braking force (to the nearest whole number) brings it to rest in 100 m???? THNX BOBPURSLeY
*Monday, November 9, 2009 at 8:24pm by JUan*

**algebra**

determine the x-intercepts for the function y=2x^2+5x-3 Factor this: 0=2x^2+5x-3 That gives the roots. i agree with bobpursley's statement as long as the numbers 2 5 and 3 are not squared or 2! 5! 3! then it would change the problem
*Friday, January 19, 2007 at 11:38am by Shay*

**Marth**

Please email me if you are interested in being a "regular" volunteer tutor. Bobpursley@gmail.com Your responses are very excellent, and helpful. Thanks for all you do.
*Sunday, July 5, 2009 at 4:36pm by bobpursley*

**Physics repost please check**

Good morning. This is a repost. The system is telling me my calculations is incorrect. I thought a fresh pair of eyes would help. Please tell me what I am doing wrong. Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. ...
*Friday, April 20, 2007 at 2:48am by Mary*

**Maths**

bobpursley have I got the answer right to this sequence question 3n - 1 answer 2,5,8,11,14,
*Thursday, September 27, 2007 at 4:55pm by Robert*

**bobpursley**

thankyou for your help would it be ok if i post my finished essay for you to read over. thankyou
*Friday, October 16, 2009 at 12:47pm by daisie*

**BOBPURSLEY PLZ HELP WITH ? BELOW!!!**

!! Look below for your answers. Dr.Phil does y equal 4
*Thursday, November 2, 2006 at 7:07pm by Margie*

**BobPursley/journaling**

What is daily journaling? (e.g. about the reading one has done for that day, or just thoughts) Thanks.
*Wednesday, August 13, 2008 at 8:15pm by jules*

**Calculus, bobpursley! **

This has to do with my last Calculus problem. I need help on it..The part I replied to after you answered the question.
*Tuesday, September 21, 2010 at 8:01pm by Leanna*

**5th Grade math**

To: bobpursley - how do you teach a 5th grader how to figure out the answer?
*Friday, August 31, 2012 at 7:29pm by Sky*

**visual**

do you have an e-mail account bobpursley, so that i can e-mail you a picture of my art? It's a good idea. I'll send it to you.
*Sunday, November 8, 2009 at 11:29am by Anonymous*

**Chemistry--bobpursley**

37. Write a balanced equation for this: Magnesium + Chlorine ---> Magnesium Chloride Is it Mg + C12 ---> MgC12 ? Thanks -MC
*Tuesday, October 26, 2010 at 6:29pm by mysterychicken*

**For Bobpursley Chemistry**

I already asked Drbob222 for a substance that i cantake to school wich contains an aromatic compund, I'm not suppose to buy because it must be at home. please help me:0
*Wednesday, January 31, 2007 at 3:37pm by Iveth*

**bobpursley**

ok thiis is my work for the next question. im i right? im not sure on the question where it asks: what is its acceleration? wouldnt it be 9.8m/s^2??? or im i wrong? h t t p : / / i 3 6 . t i n y p i c . c o m / 2 1 o u i y w . j p g
*Wednesday, October 15, 2008 at 10:16pm by Claudia*

**For bobpursley**

I will email as soon as I can. My email is not working at this moment and I don't know why. My son-in-law is looking into it right now.
*Saturday, February 12, 2011 at 8:34pm by helper*

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