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April 21, 2014

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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

physics-bobpursley/drwls
Yes
Tuesday, May 15, 2007 at 8:12am by drwls

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

Math
bobpursley and drwls, how presumptuous of me to assume that nobody would be familiar with this. I forgot that you are engineering and physics experts. This simple "number-cruncher" says sorry.
Monday, March 23, 2009 at 10:20am by Reiny

Physics
In response to drwls and bobpursley: most of the time students are posting these questions because they have absolutely no idea where to begin. I can say this from experience. We don't want the answers. We would like to know and understand how to do the problem so we can do it...
Saturday, March 6, 2010 at 8:54am by Anonymous

Physica
Peace, and mercy and blessings of God Atqm thank you for helping me teach my children and success in physics at the Mah their college education and that the wrinkles in the balance Hassanatkm for all and especially Damo,Drwls, bobpursley.Elena
Tuesday, July 17, 2012 at 6:01am by thank

math
Hehehe! Both Bobpursley and DrWLS are mathematicians. I am not a mathematician, and I don't know what you're talking about.
Wednesday, December 3, 2008 at 8:46pm by Ms. Sue

philosophy
drwls and bobpursley: I am merely countering what drwls said because it seemed like an attack on philosophy as a discipline. It is a worthy field even though it is challenging. How would reading Mad magazine do such a thing?! Even though I had never encountered material on ...
Saturday, February 14, 2009 at 5:42pm by Brandon

Math
This has been answered already. Look for a recent post of the same question, with explanations by drwls and bobpursley.
Tuesday, February 9, 2010 at 9:29am by drwls

Physics - drwls can you help me with this?
Oh okay. Thanks very much drwls =)
Wednesday, February 20, 2008 at 1:16am by ~christina~

physics
drwls is no help at all and i need help to cramster is down but then we have jerks like this who can't even give us a go or where to start that drwls for being a real winner!
Thursday, March 4, 2010 at 1:02am by KRWLS

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". ...
Tuesday, May 15, 2007 at 8:12am by Mary

math
I know that there are formulas in physics for this type of question, but I am not a physics teacher , so I will use standard Calculus a = (v2 - v1)/(time2 - time1) = (26-20)/(12-0) = 6/12 = 1/2 since a = 1/2 v = (1/2)t + c when t = 0, v = 20 20 = c so v = (1/2)t + 20 then d...
Tuesday, January 31, 2012 at 8:01pm by Reiny

Sorry - Pre-cal
sorry, not in my area of expertise. Perhaps drwls, Damon, bobpursley or DrBob or others can help out here.
Saturday, January 3, 2009 at 12:09pm by Reiny

science
I don't know science, but you might get some good responses from DrWLS or BobPursley or another science tutor.
Saturday, April 30, 2011 at 2:33pm by Writeacher

Physics - drwls can you help me with this?
Oh..I think one of the biggest problems with this question was my ability to actually visualize what was happening with the block. I thought they meant that it was at rest at it's lowest postion - thus it stopped moving and therefore SumF= 0. Thanks very much for your help ...
Wednesday, February 20, 2008 at 1:16am by ~christina~

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

Maths SUPER URGENT
Thanks. Talked to my Dad. Told me to assume that the down pipes had a width of 200mm as this is for a school auditoriam. @ drwls. Yes, the roof area has already been taken into account @ bobpursley. how would i design for max rainfall? The school is in the desert.
Sunday, May 8, 2011 at 9:42am by Lina

physics: drwls
drwls for the question below, the answer seems to be wrong: The four tires of an automobile are inflated to a gauge pressure of 1.8 multiplied by 105 Pa. Each tire has an area of 0.025 m2 in contact with the ground. Determine the weight of the automobile. It asks for the ...
Tuesday, July 22, 2008 at 10:55pm by Elisa

One for Drwls (calc)
Thanks bob, and thanks to drwls too, in the earlier ones. Charlie.
Saturday, September 15, 2007 at 8:19am by charlie

Physics..=> drwls - I need your help
Thanks drwls I was wondering though if I used sin then wouldn't the v(t)= omega A cos (omega* t)? and a(t)= -omega^2 A sin(omega* t)?
Tuesday, February 26, 2008 at 10:26pm by ~christina~

music yr 8- re- drwls
thankyou drwls for your help on buddy holly
Monday, September 22, 2008 at 7:16am by astra

Grammar
Drwls is absolutely right! I goofed. Thanks, drwls!
Tuesday, May 12, 2009 at 11:33am by Ms. Sue

Forced Oscillation - drwls => I need your help =)
Um I'm confused since that is the equation I got from my textbook so why is my book incorrect drwls?
Friday, February 22, 2008 at 2:27am by ~christina~

my bad! - trig
Go with drwls solution. somehow my +3 changed into a -3 for the second factor. there are 4 more solutions from that, as drwls shows.
Friday, October 28, 2011 at 10:12pm by Reiny

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

physics - another question
Sam is sitting in her fishing boat watching a trout swim below the surface. She guesses the apparent depth of the trout at 2.0m. She estimates that her eyes are about 1.0 m above the water's surface, and that the angle at which she's observing the trout is 45 degrees. b) ...
Saturday, January 16, 2010 at 11:31am by Sarah N H

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

To drwls
Thanks so much drwls:-) Your help is really appreciated :-)
Tuesday, November 23, 2010 at 10:13am by Anabelle

chemistry-drwls
drwls, a man of many talents.
Tuesday, December 21, 2010 at 9:47pm by DrBob222

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...
Tuesday, July 13, 2010 at 7:37pm by Me

trigonometry
Find the distance using the appropriate arch length. A television tower 520m high subtends an angle of 2deg30'. How far away is the tower? some people that helped me alot were Reiny, Damon, bobpursley, and drwls..so i just wanna say thnks to you guys...are u guys math expersts...
Friday, January 16, 2009 at 8:04pm by y912f

Calculus: drwls, please
drwls, thank you for the information. Yes the question is the first. I moved 4 points down the y-axis to the -4(?). Now, I need to graph it. I don't understand which way the curve goes (rt. or left).Thank you.
Friday, April 4, 2008 at 9:31pm by Pam

math confused for bobpursley
BobPursley is taking a couple of days off from the Jiskha Board.
Thursday, May 22, 2008 at 8:27pm by Ms. Sue

physics
Posted by sandhu on Tuesday, November 30, 2010 at 1:17am. A T is made of two identical 740 g thin solid rods. The moment of inertia of the T about an axis perpendicular to the screen through point at one end of a rod is determined experimentally to be 0.68 kg-m2. What is the ...
Tuesday, November 30, 2010 at 7:38pm by sandhu

Grammar
We're all volunteers, and most of us are retired teachers and professors. Several others have also been here for years -- bobpursley, writeacher, drwls -- among others. Many of us were volunteer tutors for AOL's Academic Assistance Center -- going back to the mid-1990s. We ...
Saturday, July 14, 2012 at 4:36pm by Ms. Sue

To bobpursley
I had a simple answer like that, but Ms. Sue wanted me to be more specific, so thats what I wrote. Thank you so much bobpursley:-)
Sunday, October 25, 2009 at 6:18pm by Sara

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. ...
Friday, April 6, 2007 at 8:49am by Mary

Physics to bobpursley or any1 else who knows this
A planet has two satellite moons. Moon X has an orbital period of 2.13 days. Moon Y has an orbital period of about 3.53 days. Both moons have nearly circular orbits. Use Kepler's third law to find the distance of each satellite from the planet's center. The planet's mass is 2....
Thursday, February 23, 2012 at 11:00pm by Angelina

Forced Oscillation - drwls => I need your help =)
Um ...actually I figured that I got omega mixed up. so basically I got the answer. P.S. Thanks for helping me out with my other problems drwls
Friday, February 22, 2008 at 2:27am by ~christina~

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/...
Sunday, February 13, 2011 at 2:47pm by Robert O.

physics
Posted by sandhu on Tuesday, November 30, 2010 at 7:38pm. Posted by sandhu on Tuesday, November 30, 2010 at 1:17am. A T is made of two identical 740 g thin solid rods. The moment of inertia of the T about an axis perpendicular to the screen through point at one end of a rod is...
Wednesday, December 1, 2010 at 8:46pm by sandhu

math
Posted by mota THE MASS OF THE SUN IS ABOUT 10^27 METRIC TONS , OR 10^30 KILOGRAMS . HOW MANY KILOGRAMS ARE IN ONE METRIC TON ? ----------------------- math - drwls 1000. ----------------------- explain please i want to understand this question :) this is my question i posted ...
Sunday, March 2, 2008 at 8:44am by mota

Physics repost
Thank you so very much. It is only because of you and drwls that I am passing my physics class. Thanks again.
Saturday, September 29, 2007 at 12:38pm by Mary

physics
thank you for your help drwls
Sunday, January 27, 2008 at 12:29am by Charles

Physics
thank you drwls :)
Saturday, February 28, 2009 at 12:09pm by Candice

Physics
Thank you, drwls! :)
Wednesday, April 15, 2009 at 8:06pm by Susan

Physics
thank you, drwls! :D
Wednesday, April 15, 2009 at 8:06pm by Susan

Physics
Thanks, drwls!
Thursday, May 14, 2009 at 11:44pm by NH

physics
thanks for your help drwls.
Sunday, September 13, 2009 at 10:11pm by Luke

Physics
thank you Drwls
Saturday, November 7, 2009 at 8:26pm by N.

physics
Thanks drwls
Sunday, November 8, 2009 at 7:05pm by Anonymous

physics
thank you drwls
Wednesday, August 18, 2010 at 3:05pm by Cassy

Physics
Thanks drwls...
Saturday, October 9, 2010 at 3:11am by Lee

Physics
Thanx drwls
Sunday, October 10, 2010 at 6:51pm by Orlando

physics
Thank you drwls!
Saturday, October 23, 2010 at 12:01pm by bill

Physics
Thanks drwls!
Monday, December 6, 2010 at 11:29pm by Jennifer

physics
thank you drwls !
Wednesday, October 26, 2011 at 5:35am by maria

physics
thank u drwls
Thursday, December 1, 2011 at 6:44pm by susan

physics
Thank you drwls!
Saturday, March 3, 2012 at 10:54pm by I

Physics
Thank you Drwls :)
Saturday, March 17, 2012 at 4:55pm by Angelina

physics
Thank you drwls :)
Friday, June 1, 2012 at 4:39pm by Shin

Physics
I got it drwls. Thank you.
Wednesday, April 2, 2008 at 12:33am by ~christina~

physics
I agree with DrWLS.
Wednesday, October 8, 2008 at 8:15pm by bobpursley

Physics: Lenses
Thank you drwls for your help!
Monday, March 23, 2009 at 11:39am by Anonymous

physics
thank u so much for help Drwls!!!!!!!!!!1
Monday, March 23, 2009 at 5:21am by chirayu

PHYSICS
Thanks Drwls & Carlie :)
Thursday, April 16, 2009 at 11:26pm by Lena

Physics
thank u so much drwls
Tuesday, May 26, 2009 at 11:07pm by sid

Physics
Thanks so much for your help drwls!!
Sunday, January 17, 2010 at 11:09pm by ucieng

Physics
Thanks so much for your help drwls!
Saturday, February 6, 2010 at 1:32pm by ucieng

physics
drwls you are awesome!!
Thursday, April 15, 2010 at 11:37am by Andy

Physics - Another Question
Oh, thank you drwls!
Wednesday, July 7, 2010 at 4:38pm by Stuck

Physics
drwls is correct.
Thursday, October 7, 2010 at 4:37pm by bobpursley

Physics
drwls is faster than me!!
Monday, January 3, 2011 at 1:12am by Dr Russ

physics
which answer drwls
Sunday, January 9, 2011 at 9:42pm by j.

physics repost bobpursley
The energy given off by 300 grams of an alloy as it cools through 50C raises the temperature of 300 grams of water from 30C to 40C. 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

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

Physics
And drwls...where is 0.2041 coming from?
Sunday, November 4, 2007 at 11:53am by Lindsay

physics-to drwls
how can we do the B part of the question...
Saturday, March 8, 2008 at 2:57am by raks

AP Physics
Thank you Dr. DRWLS
Thursday, December 3, 2009 at 12:23am by Sasami

physics
thanx so much 4 explaining it drwls!!!
Monday, July 19, 2010 at 1:07am by Anonymous

physics
drwls- so the answer cannot be determined?
Sunday, September 5, 2010 at 3:31pm by joe

Physics
THANKS 4 HELPING ME OUT drwls :)
Monday, October 11, 2010 at 6:05pm by Orlando

Physics 111
thank you so much drwls
Thursday, October 14, 2010 at 12:42am by Blake

physics
what drwls did makes no sense..
Tuesday, March 6, 2012 at 9:44am by Anonymous

Physics
Thank you Drwls! I really appreciate your help.
Sunday, March 18, 2012 at 4:02am by Priyanka

Physics.. please help!!!!!
That is not right drwls
Thursday, October 20, 2011 at 4:17am by Amanda

physics--drwls
Thanks. I thought it was more complex than that.
Friday, September 7, 2007 at 5:03pm by Anonymous

I am soooo lost in physics
I love you drwls!
Monday, September 10, 2007 at 12:04am by Kristen

Physics
Thank you very much drwls. You are great!!
Friday, February 22, 2008 at 10:54am by Shirley

Physics-to drwls
SO what is the force for the second question..
Thursday, March 6, 2008 at 8:57pm by jenish

Physics (forgot to post this question #2)
Thank You drwls
Wednesday, March 26, 2008 at 9:15am by ~christina~

Physics
the units are just lb and m, drwls
Thursday, April 8, 2010 at 11:44am by soupleh

PHYSICS
^^^^drwls How did you get 167 - 151 = 46???
Monday, October 10, 2011 at 7:59pm by Granger

physics
drwls can you show how u got the answer
Thursday, June 10, 2010 at 8:42am by um

Damon or Steve or bobpursley or drwls or ...
any ideas ? , looks way too messy for here http://www.jiskha.com/display.cgi?id=1361092708
Sunday, February 17, 2013 at 9:17am by Reiny

physics
Bobpursley Answered your question before too. Tried to attempt it. But my physics knowledge is limited.
Thursday, July 5, 2012 at 2:16pm by Adam

Physics
Thank you drwls but sorry just do not know where to begin. Mike
Friday, October 26, 2007 at 3:17am by Mike

repost physics E&M please
very interesting i get it. Thanks drwls
Tuesday, March 11, 2008 at 7:31am by Spencer

Atomic physics
Thanks drwls & Bob Pursley for your gerat help.
Monday, April 14, 2008 at 10:59pm by Sandhya

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