# bobpursley

594 results

### 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.

bobpursley/ drwls please help me with my post on Sunday, April 15 at 10:16pm and 10:19pm. Thanks!

### 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) ...

### 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 ...

### 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 ...

### Reiny or Damon or Bobpursley

Express the series 11 + 18 + 27 +...+ 171 using sigma notation. Usually you would take 27-18 and that's 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 ...

### 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 ...

### 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...

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 ...

### 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 ...

### 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...

### 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 ...

### 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...

thank you. :)

### TO BOBPURSLEY

CAN YOU HELP ME IN ETHNICS

### Math

Thank you Bobpursley

### physics

thank you bobpursley

### to bobpursley

thank you so much!

### 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 ...

### 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...

### bobpursley

Thank You very much.

I have responded

### Honors Chem B

Thank you bobpursley!

### to bobpursley

is this the correct answer: 2m^-8n^-2/9m^2n^-6??

### To : bobpursley

Please could you help me on my question:)

### 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...

### bobpursley

I revised my answers below. Thank you

### english

bobpursley, but can you give me an example

### child care

thanks bobpursley ok 6 is not b so i think is a? and 20 if its 25-30% its b?

### Mr. bobpursley

Thank you for your time and frankness. I agree with you.

yeah

### Thanks BobPursley!

Thank you so much for all of your help! I understand now!!! : )

### science (bobpursley)

what about flooding? is that one.

### Physics

bobpursley can you show the equasions you are using

### Algebra 2 ..........BOBPURSLEY

SO IF Y=0 what would x be on the graph. Please.. i do not get this...

### Physics

bobpursley, is answering questions on this all you do?

### Bobpursley

Look at my problem again please thanks

### msg bobpursley

thanks for your help on the newspaper question.it was a really big help

### 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

### 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

### Earht Science

To bobpursley, the half life is 40.(potassium 40)

### Art. bobpursley

This is a critical question.. Why does y=3 represent a function and x=3 does not

ok So The American Association of Labor legislation did what then n

### blood ex.

Can you be more specific, bobpursley? I researched hydrogenase and Im not sure what to do...

### 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!

### 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...

### Bobpursley+Chemistry

Hey Can you take a look at my previous post that you replied on.

### bobpursley

like what are the steps to getting into a hospital is what prehospital means

### Algebra(repost of one question)

Bobpursley: 89. Solve for x in the equation: (6/7)x - 6 = -2 I got x=28/3

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

BASICALLY WHAT THE TITLE SAYS!

### 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

### bobpursley

2 3/5 = 6c 13/5= 6 You said to divide both sides by six can you show me an example please? Thanks!

### come back bobpursley

i'm hoping you have my answer - i'm still working on it though

### 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

### chemistry

Sorry bobpursley for the multi post< i kept posting it wrong. thanks for yur help

### Science (bobpursley)

Why is an extra day added to February every four years?

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 ...

### Question For Bobpursley!

Can you give me some examples for how to solve quadratic equations? It would really help!

### 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.

### 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.

### Geometric Series (bobpursley)

Could you please check my same post again, I had another question.

### 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?

### 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 ...

### 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...

### 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?

### To: bobpursley

Can you please check my other science posts as well. They are still on the 1st page, thank you very much:-)

bobpursley did i do the math problem right if not could u do it for me .thanke

### 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 ...

### 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

### 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!

### 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

### physics

Bobpursley; you helped me with my question and I am a little stuck how would I find distance if I don't know time and vice versa?

### 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.

### 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?

### 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

### 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

### 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

### Science (bobpursley)

Does mass increase or decrease when the distance stays the same and the force of gravity between two objects decreases?

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 ...

### 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...

### 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 ...

### 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!

### 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! :-)

### 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?

### 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

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. ...

### 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

### 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.

### Maths

bobpursley have I got the answer right to this sequence question 3n - 1 answer 2,5,8,11,14,

### bobpursley

thankyou for your help would it be ok if i post my finished essay for you to read over. thankyou

### BobPursley/journaling

What is daily journaling? (e.g. about the reading one has done for that day, or just thoughts) Thanks.

### 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.