Friday

March 6, 2015

March 6, 2015

Number of results: 114,263

**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
*September 12, 2007 by Haley*

**Geometric Series (bobpursley)**

Could you please check my same post again, I had another question.
*September 19, 2011 by Anonymous*

**physics-bobpursley/drwls please check**

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

**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 ...
*November 4, 2010 by Joey*

**Physics-bobpursleyplease 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 ...
*November 4, 2010 by Joey*

**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.
*April 6, 2010 by Sara*

**Algebra 1 Please bobpursley again**

Thanks to everyone for trying to help me. This is not really a question but an answer to what grade level this promblem is for my son is in ninth grade. Thank You all again
*September 12, 2009 by Mary*

**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...
*April 6, 2007 by Mary*

**Bobpursley**

Look at my problem again please thanks
*February 5, 2015 by Bill*

**drwl / bobpursley please check**

I had posted three questions at 1:48pm, 2:40pm and 2:41pm and I am having problems with them. Can you please check them for me. Thanks! Repost if you are not satisified with the responses.
*March 13, 2007 by Mary*

**Physics-Please check calculations**

I posted this earler and you gave me help, could you please check what I did? Thank you If a car drives off a 40 m high cliff with a horizontal velocity of 15 m/s, how far from the base of the cliff will the car strike the ground? Could someone help with the equation, please ...
*January 2, 2011 by JessieLynne*

**Physics check**

I just want somebody to check my answer on this problem please :-) There is a box which weighs 1000 kg. There is an applied force acting upon it with a force of 20000 N (horizontally). The mu is 1.2. What is the acceleration (again, horizontally) of the object? I got 8.24 m/s^...
*November 5, 2007 by Emily*

**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...
*April 6, 2007 by Mary*

**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. ...
*April 20, 2007 by Mary*

**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 ...
*April 19, 2007 by Mary*

**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
*October 15, 2008 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
*August 24, 2009 by Chrissy*

**for bobpursley please check**

ok So The American Association of Labor legislation did what then n
*January 20, 2008 by Michalea*

**Physics-bobpursley can u check this again please**

Q. A 10.6 kg weather rocket generates a thrust of 226.0 N. The rocket, pointing upward, is clamped to the top of a vertical spring. The bottom of the spring, whose spring constant is 402.0 N/m, is anchored to the ground. Initially, before the engne is ignited, the rocket sits ...
*October 28, 2010 by Lyn*

**Physics - urgent, please help!**

10pm. I asked "Show mathematically that to produce an image that is the same size as the object in a concave mirror, the object needs to be at twice the focal length from the mirror." and bobpursley answered: "1/o + 1/o=1/f 1/2f + 1/i=1/f 1/i=1/2f i=2f M=di/do= 2f/2f= 1 check ...
*November 17, 2008 by Juniper*

**To: bobpursley**

Can you please check my other science posts as well. They are still on the 1st page, thank you very much:-)
*April 8, 2010 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
*June 4, 2012 by lisa*

**BOBPURSLEY PLEASE CHECK BELOW!**

please check below! patience.
*December 9, 2006 by Margie...*

**Plz help Physics-bobpursley**

A 200W lamp is totally immersed in 1500gm of water. How much will the temperature of the wtaer rise in 3 mins? Neglect heat losses from the water. Please dont put names in the subject...you limit yourself to who can respond, when others may be able and available. Again, please...
*April 17, 2007 by Segun*

**Math(Please Check Again)**

25-x^2 6x^2 ------ * ------ 12 2x *I got: 5-x/2 No. Try again. Can you tell me what I did wrong please.? You have to factor the numerator, you should have two factors for the first, and one for the second. In the denominator, you will have 24 x. I think the x divides out, and ...
*February 21, 2007 by Margie*

**Physics (CHECK)**

One student is pushing on a chair with a force of 260.6 N directed at an angle of 30 degrees above horizontal while a second student pushes on the same side of the chair with a force of 21.0 N at an angle of 15 degrees below horizontal. What is the magnitude, in N, of the sum ...
*October 1, 2009 by tracy*

**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 ...
*December 11, 2006 by Jen*

**physics**

A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone please help out.Thank you! ...
*April 26, 2012 by Akbar*

**bobpursley, please help me understand**

I asked "Show mathematically that to produce an image that is the same size as the object in a concave mirror, the object needs to be at twice the focal length from the mirror." and you answered: "1/o + 1/o=1/f 1/2f + 1/i=1/f 1/i=1/2f i=2f M=di/do= 2f/2f= 1 check my thinking...
*November 17, 2008 by Juniper*

**Chemistry(Please check)**

. Ksp for Fe(IO3)3 is 10-14. Two solutions, one being iron(III) nitrate and the other being sodium iodate, were mixed. At the instant of mixing, [Fe3+] = 10-4M and [IO3-] = 10-5M. What happens? My answer is that a precipitate forms because Qsp > Ksp. Would you agree? ...
*April 9, 2012 by Hannah*

**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!
*January 12, 2009 by Payge*

**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
*September 27, 2010 by Helena*****

**Math please check answer**

please check my answer thanks What would be the amount of compound interest on $ 8,000 invested for one year at 6 %, compounded quarterly ? (need to show all of your work ) ok this is what I got $8,000 x 0.6 = $ 480 $ 480 / 4 = $120 $120 x 0.6 / 4 = $ 121.80 $8,241.80 x 0.6 /4...
*May 19, 2008 by Maria*

**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...
*May 7, 2013 by Leila*

**To Drbob222**

Please check my post again
*April 21, 2014 by Jannet*

**English**

Can you please check these few sentences, please? Thank you. 1) I just wanted to know why two meals are not included in your rate and how much your hotel charges for a dinner. 2) Would you please be so kind and send me the details of your offer again?
*June 3, 2011 by Henry1*

**Physics-Someone please recheck **

Bob Pursley rechecked my question and it was correct if you scan down but he didn't direct me where to find direction of magnetic force on plane and do the pilots have to make corrections to make up for the difference? I'd appreciate any help with that, if possible Thank you ...
*April 23, 2011 by Russ*

**grade 12 chem - check my answer again please**

Hi, please check my work: In an experiment, 23.4 g of FES are added to excess oxygen and 16.5 g of FE2O3 are produced. The balanced equation is: 4FeS + 7O2 --> 2Fe2O3 + 4SO2 Calculate the % yield. My Answer: nFeS=23.4g/87.92 g/mol =0.266 mol 4mol FeS / 0.266 mol = 7mol O2/ ...
*May 24, 2008 by Sarah H*

**physics-bobpursley/drwls**

Good morning! I just wanted to say thank you for all of your help. This was my first time taking Physics ever and it was like a foreign language to me. For a long time during this semester I had an "F" average, because of you both I have passed my physics class with a "C". ...
*May 15, 2007 by Mary*

**Physics (please help!!!!)**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly ...
*May 2, 2011 by Abi*

**Physics**

Please help me with the following problem: Joe is on a cross-country trip from New York to Los Angeles. He drives for 45.0 min at 70.0 km/h, 10.0 min at 95 km/h, and 30.0 min at 55.0 km/h, and he spends 20.0 min eating lunch and buying gas. What is the average speed for this ...
*March 5, 2014 by Brady*

**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...
*April 17, 2011 by please, help me *

**chemistry**

After your explanation I try to solve it, so would you please check my work again. Thank you! a)
*April 8, 2007 by wendy*

**Physics Urgent!!!!! I really need help with this**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly ...
*May 2, 2011 by Abi*

**gurublue bobpursley and writeacher**

im sorry to have kept on asking thats what i couldnt understand sorry i was getting confused. thankyou so much for your help hopefully i wont ask again!
*October 19, 2009 by daisie*

**More Rational Exponents!**

1. The optimal height h of the letters of a message printed on pavement is given by the formula . Here, h= (0.00252d^(9/4))/e d is the distance of the driver from the letters and e is the height of the driver’s eye above the pavement. All of the distances are in meters. ...
*February 14, 2014 by Brady*

**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 ...
*February 27, 2007 by COFFEE*

**English**

Hello. Please help me with a few questions. 1) Which is the correct position of "again" in the sentence: "They have (again)gathered (again)at the square (again)"? 2)Does the phrase "the allegations doubt his integrity" have the same meaning as "the allegations question his ...
*May 15, 2011 by Ilma*

**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, ...
*June 22, 2009 by jane*

**Physics-bobpursley or drwls please check if possib**

If I had the old-fashion camera that had a focal length of 35mm(0.035m) and I take a picture of a person 6 m away, how far does the film need to be from the lens to record a clear image? I know that the equation is 1/f = 1/d(object) + 1/d(image) so would I do the following: 1/...
*February 13, 2011 by Robert O.*

**Math2[Please Check Again]**

Problem: a^2-9 a^2-3a ----- * -------- a^2 a^2+a-12 What I Got: 3-3a ---- a-4 *Please Check My Work.* Nope. factor the denominator to a^2(a+4)(a-3) The last factor divides out in the numerattor (second term factors to a(a-3). The a in the numerator reduces the denominaor a^2 ...
*February 24, 2007 by Margie*

**physics**

A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone please help out.Thank you! ...
*April 24, 2012 by Akbar*

**physics**

A 34 g glass thermometer reads 21.6°C before it is placed in 135 mL of water. When the water and thermometer come to equilibrium, the thermometer reads 38.7°C. What was the original temperature of the water? I need help on this please could someone please help out.Thank you! ...
*April 25, 2012 by Akbar*

**calc: avg value**

Find the average value of the function "f(x) = x^2 sqrt(1+x^3)" on the interval [0,2]. and this is what i did.. please check for mistakes. thanks :D f(x) = x^2 sqrt(1+x^3), [0,2] f ave = (1/(b-a))*inegral of a to b for: f(x) dx f ave = (1/(2-0))*integral of 0 to 2 for: x^2 ...
*July 2, 2007 by COFFEE*

**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 ...
*April 27, 2012 by Tabby*

**English**

I urgenlty need you to check these sentences. Thank you. I'm emailing you the list of objectives again since my first draft was incomplete. I still have to add a few things as to the impact of the project on our students and the European value attached to it. Let me check the ...
*February 1, 2012 by Henry2*

**Please check my maths?**

How should i do this question?? it says: find the equation of the tangent to the curve y=(x-2)^3 at the point (3,1). calculate the coordinates of the point where this tangent meets the curve again. I know how to get the first part, if i'm not wrong, it's y = 3x - 8 but no ...
*June 19, 2009 by holly*

**physics**

Posted by michelle quendarsv on Saturday, November 20, 2010 at 5:26pm. Posted by michelle quendarsv on Saturday, November 20, 2010 at 3:55pm. if it takes 726 watts of power to move a mass 36 meters in 14 seeconds, what is the mass? i really need like, step by step help please...
*November 20, 2010 by michelle quendarsv*

**DrBob222 please check**

DrBob222 please check my physics question posted at 8:55pm. The subject is drwl please check. I am not getting a response from drwl. Thanks! Mary DrWLS is not on right now. My physics is too poor to trust my answers. Bob Pursley is smarter than I am; he does physics, math, and...
*February 27, 2007 by Mary*

**Physics**

1)The velocity of sound in air is 332 m/s. If the unit of length is km and the unit of time is hour, what is the value of velocity? m/s bobpursley said he would be happy to check my work but I don't know what theyre looking for I thought they are looking for the unit which is ...
*April 15, 2008 by Jon*

**DrRuss/bobpursley/drwls please help!!!**

Can you please clarify your response to my post Wednesday April 4th at 8:53pm and 8:54pm. Thanks for all of your help!!! pleasde repost it. Yes, repost it. Go to it, copy, and paste it here. Thanks. A vertical spring with a spring constant of 450 N/m is mounted on the floor. ...
*April 6, 2007 by Mary*

**English**

1. The Glass Menagerie once again taps into the audience's emotions, as it has for 70 years. 2. "Her son is about to fly away, never to seen or heard from again and she knows it," Jones said. (Are they all grammatical? Would you check the errors in them?)
*October 25, 2013 by rfvv*

**Physics help again!**

A ball is thrown horizontally off a 35 m tall building. It hits the ground 80 m from the bottom of the tower. a. what is the balls time in the air [i got 2.67] b. what is its initial velocity? [i got 0] c. What is the magnitude and direction of its velocity as it strikes the ...
*October 20, 2008 by Hayden*

**language art CHECK**

Will somebody please check this for me and see if i used the words correctly please? Having spent many years as political opponents, the two senators have developed a(n)MUTUAL respect for each other. Please check if it is correct. thank you
*January 17, 2012 by saranghae12*

**French**

Sra could you please check my french post again.
*April 28, 2011 by Sydney*

**math(check answers please)**

please check my math answers again thanks. by the age of 27,justin had visited 25 out of the 50 states.what fraction of the states had justin visited?write the answer in simplest form. A.2/1 B.25/50 C.1/2(I PICKED THIS) D.1/3 Heather drove 10 miles in 22 minutes.which is the ...
*November 20, 2013 by matt*

**physics again (check answers please)**

What net force increases a velocity of a car from 20 m/s to 35 m/s in 8.0 s if the mass of the car is 1600 kg? (3000 N). What force would cause the car to stop? (3000N) What coefficient of friction is needed to supply the force of friction? (.0191) are they correct?
*November 8, 2008 by lauren*

**DrBob I answered the ??**

I rote the qestion Amy... please check your question below. I answered Back again!!
*November 8, 2006 by Amy*

**re-Writeacher,Bobpursley+SraJMcgin**

Thankyou so much to all of you for helping me all of your ideas and sites you found have helped me alot. thankyou again. you are all stars!
*June 4, 2009 by leigh*

**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 ...
*October 22, 2008 by Giznelbell*

**Physics (please help!!!!)**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly ...
*May 1, 2011 by Abi*

**Physics (please help!!!!)**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly ...
*May 1, 2011 by Abi*

**Physics check**

A speeder traveling at 41 m/s passes a motorcycle policeman at rest at the side of the road. The policeman accelerates at 3.3 m/s2. To the nearest tenth of a second how long does it take the policeman to catch the speeder? Im sorry I am new to physics this is my first year and...
*July 13, 2010 by Me*

**drwls please check**

Can you please check my physics posts. Thanks!
*November 6, 2007 by Mary*

**Math**

Can someone please check my answers below for accurateness? The instructions are: Differentiate and simplify. 1) y=(2x^2+3x-1)(3x^2-5x-3) y'=(4x+3)(3x^2-5x-3)+(2x^2+3x-1)(6x-5) 2) y=(5x^2+3x-1)(3x^2-5x-3) y'=(10x+3)(4x^2-3)+(5x^2+3x-1)(8x) 3)y=6x^3-7x^2+5x-7+x^(5/3)-7/(x^3) y...
*August 7, 2009 by Christine*

**To : bobpursley **

Please could you help me on my question:)
*October 1, 2014 by Rain*

**chemistry f/u**

Thank you Mr. bobpursley. I am still unclear on a few things. massethanol*Ceth(Tf-7.7)+masswater*Cwater*(Tf-27.1)=0 solve for Tf 17.75g ethanol x(Tf-7.7)+31.6g water x (Tf-27.1)=0 This is the algebra that I do not know how to derive to move to the next step. Do I add it all to...
*September 4, 2011 by Ben*

**Simplify (Another Question/problem) 3**

Simplify. (27a^(-6) )^(-2/3) I got 1/(9a^4 )as my answer, but can someone again please check this. I will appreciate it. I am just unsure if it is correct or not.
*February 14, 2014 by Brady*

**physics multiplying vectors**

n the product F = qv · B , take q = 4, = 2.0i + 4.0j + 6.0k and = 136i -176j + 72k. What then is in unit-vector notation if Bx = By? ~~may i get some assistance in this problem? so far.. i tried this.. 136i-176j+72k = 4(2.0i+4.0j+6.0k)(B) 136i-176j+72k = (8i+16j+24k)(B) [(136i...
*March 29, 2007 by sam*

**bobpursley**

Can you please answer my last post? Thanks -MC
*March 20, 2010 by mysterychicken*

**physics**

thank you bobpursley
*September 21, 2010 by john*

**accounting srjmcgain**

thank you for helping me but i cant put two choices down so can you pick which is better please that will help me alot i will appreciate it so much. thank you. 1. Think again. You have received money = a, c It is a positive thing for y ou. 2. This is a negative thing for you. ...
*April 10, 2009 by anonymous*

**Physics Urgent!!!!! I really need help with this**

Sorry to repost this, again, but I still don't understand. Newton’s Law of Gravity specifies the magnitude of the interaction force between two point masses, m1 and m2, separated by the distance r as F(r) = Gm1m2/r^2. The gravitational constant G can be determined by directly ...
*May 2, 2011 by Abi*

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

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

**French for Anonymous to Sra**

its me again could u please tell me how to say by: to: due: I need it for my title page thanks again:)
*January 11, 2009 by Anonymous*

**Pre-Calculus**

I posted earlier and didn't get an answer so I'm posting again-hoping someone could please check these two-I think they're correct Please check my answer: I think it's correct? 1.Find polar form of (-3,2) r=sqrt of (-3)^2 + 2^2)=sqrt (13) = 3.61 tan^-1(2/-3) = 33.79 180-33.79...
*October 13, 2011 by Courtney*

**Physics with work, pls help**

A proton is moving in a circular orbit of radius 11.8 cm in a uniform magnetic field of magnitude 0.232 T directed perpendicular to the velocity of the proton. Find the orbital speed of the proton. Answer in units of m/s. I came up with .118/2.83x10^-7 and it was incorrect. (...
*April 15, 2011 by cr*

**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 ...
*January 16, 2010 by hellogoodbie*

**to: bobpursley**

please help me with the last question, are the others all correct?
*September 8, 2013 by Sophie*

**Chemistry**

Can you please help me to work out the addreviated structural formulae of hydrolysis of tocainide? Won't it be the -NH2 group that hydrolyzes? ArNH2 + HOH ==> ArNH3^+ + OH^- Check my thinking. Thanks That is exactly what I thought it would be. Thanks again DrBob.
*February 20, 2007 by Paula*

**English**

Could you please check this sentence I need to include in a letter? 1) Thank you very much for your last e-mail. Unfortunately, I couldn't read the document attached to it. 2) Actually, it was blank. Can you post (send) it to me again (once more, another time).
*October 26, 2011 by Henry2*

**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) ...
*March 10, 2011 by KIKSY*

**Physics**

An inductor used in a dc power supply has an inductance of 12 H and a resistance of 180 ohms and carries a current of .300 A. (a) How much energy is stored in the magnetic field? (b) At what rate is thermal energy developed in the inductor? ok once again I got part (a) .540 J...
*March 18, 2008 by J*

**Physics**

An inductor used in a dc power supply has an inductance of 12 H and a resistance of 180 ohms and carries a current of .300 A. (a) How much energy is stored in the magnetic field? (b) At what rate is thermal energy developed in the inductor? ok once again I got part (a) .540 J...
*March 18, 2008 by J*

**Simplify**

Simplify the following number. ∛729 I think it is ∛9, but I do not know. Please help, and check my answer. I will appreciate it if you guys can answer this as soon as possible. It is part of a RATIONAL EXPONENTS question. The original equation was 9^(1/3)∙&#...
*February 14, 2014 by Brady*

**bobpursley please check**

Good evening. Thanks for all of your help so far. I posted a question on wednesday 28 Feb @ 11:55 pm that you answered by I am not sure of how to tackle the problem. This is what I came up with so far. Mass of Puck A m1 = 0.021 kg Mag. of init. veloc.of Puck A V01=5.5kg (...
*March 4, 2007 by Mary*

**com -- To b-more-nappy**

I deleted your last post in which you expect us to proofread an essay you copied verbatim from an internet site. Bobpursley and I both showed you that that is not your work and is indeed, plagiarized. If you post it or any other plagiarized work again, you will be banned from ...
*August 30, 2011 by Ms. Sue*

**English**

* According to the spacing rules, write the following sentence again in the blank. 1. Iamapoliceofficer. -> __________________ (Is the expression correct?) * I have sent the MTCN number to you with my cell phone. However, you can not verify the name of the sender. You also ...
*June 2, 2009 by John*

**Bobpursley for this question please, physics**

I dont understand though why you can make w/mlambda I thought it was the otherway around? (in regards to this w/N sinTheta= m lambda N= w/(m lambda) * sinTheta N= w/(m lambda) * x/L
*December 11, 2007 by URGENT*

**English**

Can you please help check the sentence again. I forgot to include the verb. If you want, you can help me write a short description of your school including the summer courses and the students' mobility opportunities your school offers.
*March 23, 2012 by Matthew*

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