April 16, 2014

Search: DRWLS

Number of results: 28,316

Physical Science (repost for drwls)
My response was posted with the orginal question.
Sunday, May 3, 2009 at 2:23pm by drwls

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

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

to drwls
and how would I do that? Can i find it without calculus in other situations?
Sunday, August 9, 2009 at 4:44pm by to drwls

Yes, you should convert weight to mass.
Saturday, January 23, 2010 at 6:19pm by drwls

Physics to drwls question to answer given earlier
I don't see anything wrong.
Friday, February 17, 2012 at 11:16pm by drwls

HEY DRWLS!! I have a question
Done. Your answer was right. :-)
Tuesday, January 29, 2008 at 3:53pm by drwls

TO drwls
You're welcome! I appreciate your thoughtfulness and am glad I was of some help in your studies.
Friday, February 22, 2008 at 11:31am by drwls

Math drwls can't help
I am afraid I do not understand the formula. Sorry
Wednesday, October 15, 2008 at 1:42am by drwls

drwls, this is the whole point of this sight. DA
Tuesday, December 7, 2010 at 5:44pm by drwls is a ****

for: drwls -Dr.Russ
He does visit here occasionally, but I don't know how to reach him. Perhaps he will see your questions and be able to help.
Wednesday, March 12, 2008 at 11:26pm by drwls

Physics - drwls can you help me with this?
Yes. But you don't need to use that equation to get Tension or position vs. time. I used an energy method
Wednesday, February 20, 2008 at 1:16am by drwls

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~

I skipped that step that tanx*cotx = 1
Friday, March 7, 2008 at 6:25pm by drwls

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

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

Physics - drwls can you help me with this?
The block IS temporarily at rest at its lowest position, but it is accelerating up again at that time. It is not in force equilibrium there.
Wednesday, February 20, 2008 at 1:16am by drwls

I answered this question earlier in the week. Search the archives of DrWLS at this site for details. (Upper right corner)
Saturday, March 6, 2010 at 8:53am by drwls

I assume you mean the #4 sentence about Maya Angelou. "Estos" is not a valid verb conjugation of estar. It should be esta'.
Thursday, November 8, 2007 at 8:24am by drwls

Chemistry; to drwls or drbob
I have already answered this question with the corrected decimal point. Please review previous posts
Monday, February 4, 2008 at 1:29pm by drwls

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

Angular Acceleration
Already answered. Check your other posts of the same question for the answers Damon and drwls have provided
Tuesday, February 14, 2012 at 11:13pm by drwls

drwls please read
You posted this twice. I answered already, attempting to get you to learn how Newton's Third Law applies, and I agree with Damon.
Saturday, October 25, 2008 at 3:48pm by drwls

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

January 29, 2008 Dear drwls: Thank you for your prompt response! Sincerely, Manny
Tuesday, January 29, 2008 at 3:12am by Manny to drwls

drwls please check
I did, but please see my comment (with one answer) about why I have been avoding E&M questions.
Tuesday, November 6, 2007 at 12:30am by drwls

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

I got it! Thank for your help, drwls.
Monday, December 10, 2007 at 11:46pm by Thanks, drwls

Tuesday, May 15, 2007 at 8:12am by drwls

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

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~

Thanks for correcting me. Geological features can certainly be considered part of the subject of geography, but geology is a scientific discipline all its own. Sorry I was not able to be of more help with your questions about moraines.
Tuesday, February 8, 2011 at 6:17am by drwls

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~

I answered this yesterday. Check previous drwls answers using the search box in the upper right. Are you the same person who asked it before or is this from nationwide assignment of some online or or home schooling course? Repeat posts are an annoyance here.
Monday, January 25, 2010 at 10:21am by drwls

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

Algebra-drwls please check!
Since neither b nor h appear in your answer choices, I have no whay of knowing what they refer to and cannot answer the question. You must have omitted important information or a figure.
Tuesday, October 12, 2010 at 4:37pm by drwls

You're welcome Pam!
Thursday, March 6, 2008 at 10:35pm by drwls

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 - urgent
<<I don't quite understand what drwls means by 'x' in the equation eEx. >> x is the distance the electron travels along the E-field. It is 0.025 m in this case. eE is the force, so eEx is the work done.
Tuesday, April 21, 2009 at 9:38pm by drwls

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~

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

drwls history
Thank you for your kind words. I'm almost old enough to remember those days. (My first memory is of the Pearl Harbor attack.) It's hard to forget those terrible days. My wife, who was born in Germany and is a few years older, also has vivid memories of those times.
Sunday, October 17, 2010 at 7:28am by drwls

I also calculated the expression given by drwls and got 1.4666 x 10^5 drwls used 22/7 because your question suggested to use pi = 3 1/7 or 22/7 (btw, I know why you got your incorrect answer, you must divide by both 200 and 24, you divided by 200 but then multiplied by 24)
Thursday, January 10, 2008 at 11:39pm by Reiny

Physics - drwls can you help me with this?
Using the energy conservation is always a good shortcut to get conditions at turnaround points, or maximum velocities, when there is oscillatory motion. You would used Newton's law of acceleration if you wanted to solve for the equation of motion vs. time. The quickest way to ...
Wednesday, February 20, 2008 at 1:16am by drwls

Posted by mota on Saturday, March 1, 2008 at 3:34am. 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 ...
Sunday, March 2, 2008 at 9:16am by mota

AQA Mechanics (M1), Statics and forces,please help
thanks drwls, please explain little, tnx The diagram shows a cylinder of mass 20 kg lying at rest on two smooth planes inclined at angles of 40 degree and 50 degree to the horizontal. Calculate the reaction force exerted by the planes on the cylinder.
Monday, March 19, 2012 at 5:44am by Bob @ drwls

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

drwls why is the number so big?! help
Oh..I got a humongous number drwls. I used PV=nRT T= 274.15K P= 1atm V=100m^3 R= 8.2x10^-5 m^3* atm / K*mol then I got 4,448.33mol then I plugged that into Q= nCp(DeltaT) Cp= 7/2*R T= 274.15K n=4,448.33mol Q= 35469438.74 J ?! Why is it so bib
Wednesday, March 26, 2008 at 7:57am by ~christina~

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

Drawls, How did you get 2h. and then the 2a/h from.Can you help me understand it when you get a chance. Directions: Solve each literal equation for the indicated variable. A=1/2h(B+b) (For b) Area of a trapezoid For Further Reading math,algebra - drwls, Monday, December 18, ...
Monday, December 18, 2006 at 1:30pm by jasmine20

Anne, you were not so dumb at all! I solved the above question the same way by multiplying top and bottom by 1+Z. Whether you substitute first and then multiply like drwls did, or multiply first and then substitute does not matter, you should get the same result. I had (3i-1....
Thursday, March 13, 2008 at 7:15am by Reiny

physics: drwls
That is the answer I came up with yesterday. As I said before, they may want you to multiply contact area by gauge pressure instead of absolute pressure, as I did. I don't agree with that method. If you do it that way, you get 1.8^10^4 N for the car's weight. I cannot be of ...
Tuesday, July 22, 2008 at 10:55pm by drwls

drwls & Damon - maths
My first suggestion was to try the method of "integration by parts", but that may not work. I found a recursion formula for the integral in my Table of Integrals, but it ends up requiring the integral of e^-x/x , which is a new fucntion called the exponential integral, Ei(x). ...
Saturday, December 29, 2007 at 9:45pm by drwls

This used to be one of my favourite max/min type of questions when I taught this stuff a long time ago. Here is a slightly different approach from the solution done by drwls. let the radius of the circle be r, then the side of the square is (30-2(pi)r)/4 = (15-(pi)r)/2 A = [(...
Wednesday, June 11, 2008 at 11:09pm by Reiny

Physics Drwls
The answer will not depend upon the mass of the bike and rider. That will cancel out. Coasting up the hill, the bike will stop when the initial kinetic energy equals the potential energy increase, M g H. H is the increase in altitude. Vo^2/2 = g H Solve for H. Strictly ...
Tuesday, November 22, 2011 at 10:19pm by drwls

Physics..=> drwls - I need your help
I used sin because the displacement at time =0, and then it becomes positive at first. cos (wt + pi/2) is the same thing as -sin wt, anyway. Your formula is OK if you define positive motion to be opposite to the direction of m1 before impact. However, in the first part I think...
Tuesday, February 26, 2008 at 10:26pm by drwls

You didn't ask the question correctly AND you still seem to be confused in your response. Cl2 does not react with bromine. Cl2 will react with broMIDE ion and that is the equation written by DrWLS. Cl2 is gas. Br2 is a liquid. BromIDE is an aqueous solution of sodium bromide, ...
Wednesday, February 13, 2008 at 5:31pm by DrBob222

Physical Science
You're right, at least according to most of the sources I can read after seeing the response by DrWLS. But I didn't think red and blue light had enough energy to induce photosynthesis which is why I went with UV. In chemistry we usually write a chemical equation like this. A...
Saturday, May 9, 2009 at 11:17am by DrBob222

drwls gave you the equation above. "You therefore have a horizontal line with equation" y = 18.1 points (-6.2,18.1) and (-3.4,18.1) As drwls said above, "The slope is zero and the y-intercept is 18.1." The slope intercept form of an equation is, y = mx + b m = 0 y-intercept = ...
Monday, February 28, 2011 at 11:46am by Helper

Monday, February 22, 2010 at 11:24pm by drwls

To drwls
Tuesday, November 23, 2010 at 10:13am by drwls

Any of them.
Thursday, August 30, 2007 at 11:25pm by drwls

s(t^2-1) = s(t+1)(t-1)
Friday, September 7, 2007 at 2:53pm by drwls

f'(x) = -8/(x+2)^2 f'(0) = -8/4 = -2
Sunday, July 4, 2010 at 8:45pm by drwls

science thanks
Saturday, October 6, 2007 at 12:07am by drwls

x = x
Monday, November 12, 2007 at 5:16am by drwls

No. It is 2:1
Friday, November 23, 2007 at 3:33pm by drwls

Algebra 2
Saturday, December 15, 2007 at 8:56pm by drwls

Yes, d.
Friday, December 28, 2007 at 2:12am by drwls

Thursday, January 17, 2008 at 3:57pm by drwls

Saturday, January 19, 2008 at 11:00pm by drwls

Monday, January 28, 2008 at 8:43pm by drwls

Thursday, January 31, 2008 at 7:02pm by drwls

B. and D.
Sunday, February 3, 2008 at 12:06am by drwls

Monday, February 4, 2008 at 2:33am by drwls

4 B) 5 D)
Thursday, February 7, 2008 at 2:01am by drwls

Sunday, February 10, 2008 at 4:59pm by drwls

Thursday, February 21, 2008 at 7:31pm by drwls

1 + 2 + 2 2 + 1 + 2 2 + 2 + 1 1 + 1 + 3 1 + 3 + 1 3 + 1 + 1
Wednesday, February 27, 2008 at 7:22pm by drwls

Wednesday, March 12, 2008 at 1:13pm by drwls

Tuesday, March 18, 2008 at 10:03am by drwls

(x + y + z)/3
Tuesday, April 1, 2008 at 1:48am by drwls

Friday, April 4, 2008 at 2:22am by drwls

Algebra 2
Monday, April 7, 2008 at 12:56pm by drwls

Friday, April 11, 2008 at 8:56am by drwls

n + n/3 = (4/3)n
Monday, July 7, 2008 at 12:36am by drwls

Wednesday, May 14, 2008 at 8:27pm by drwls

Thursday, May 15, 2008 at 6:56pm by drwls

Friday, May 16, 2008 at 11:05pm by drwls

Ok. Then what?
Sunday, June 1, 2008 at 10:41pm by drwls

(x-8)(x+1) = 0 x = 8 or -1
Friday, June 6, 2008 at 11:04pm by drwls

If I = E/(R + r) R + r = E/I r = (E/I) - R
Tuesday, August 5, 2008 at 11:13pm by drwls

7(u + v)
Thursday, August 7, 2008 at 12:34pm by drwls

Tuesday, August 26, 2008 at 12:21am by drwls

Tuesday, August 26, 2008 at 7:18pm by drwls

Monday, September 8, 2008 at 9:20pm by drwls

-6 x -2 = ?
Monday, September 8, 2008 at 11:31pm by drwls

Yes, it could be that
Sunday, September 14, 2008 at 10:15am by drwls

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