Thursday
May 26, 2016

Posts by Simon

Total # Posts: 158

Social Studies
why greater responsibility is placed on the husband in marriage
May 18, 2011

Quantum Physics
I dont understand why you've used 4 pi in your answer, i assume your rearranged the uncertainty principle equation for delta Px, but isnt the reduced plancks constant h/ 2pi instead of 4pi ?
May 18, 2011

discreet math
verify that f(n) = 1 + 2 + 4 + 8+..+ 2^n has order 2^n
May 1, 2011

LIfe orientation
I think the community will encountor many problems due to substance abuse
April 26, 2011

Physics 30
I see now that my question was already answered.
January 25, 2011

Physics 30
It takes a plane flying at 150 km/h 3.0 minutes to circle around a cloud at an altitude of 3000m. What is the diameter of the cloud?
January 25, 2011

Physics HELP! QUICK!
So does that mean you can just use friction force without resolving it into its components, and so what you use in you equation would be: M V^2/R = M g sin A - M g cosA*mu (This is what you did in the previous example) So did you basically just ignore the vertical component of...
December 22, 2010

Physics HELP! QUICK!
A banked circular highway curve is designed for traffic moving at 55 km/h. The radius of the curve is 220 m. Traffic is moving along the highway at 38 km/h on a rainy day. What is the minimum coefficient of friction between tires and road that will allow cars to take the turn ...
December 22, 2010

English
Hey "drwls" can you explain to me how you solved a previous physics question that you answered? It's for the following question below, and it's already posted on here. Unfortunately, it didn't allow me to post the link to it, so you may have to search for...
December 22, 2010

English lit
Alright thank's!
December 3, 2010

English lit
Who would have thought...eheh last week I had a literature exam about ''The Necklace''. Thanks for the good, tragic, idea. By curiosity, why would the father kill himself? If other people have more ideas, be free to post. Thanks all.
December 3, 2010

English lit
Thank's for pointing that out Writeacher. I approve that Ms Sue's classic story is more in the spirit of Christmas, but I'm more in search of a story with a suprising ending. When you read the end, you're like : wow, who would have thought that...
December 3, 2010

English lit
So, for my english class, I'll have to write a Short story ( Exposition Rising Action Climax Falling action Resolution ) I'd like the story to be around the theme of christmas or horror during x-mas. So I need you guys to help inventing a story with a surprising ending...
December 3, 2010

Math
Reiny is right.
December 3, 2010

earth
? = 8 :D
December 3, 2010

physics
Also how did you just substitute mg in for the Normal Force. Cause when I solved for the normal force from the vertical components I got: FNcos A + mu*FNsin A = mg FN = mg / (cos A + mu*sin A) And I basically just substituted that into: FNsin A - mu*FNcos A = m*v^2/R I solved ...
October 5, 2010

physics
I know its been a while, but I'm just wondering how drwls solved the question without resolving friction into its x-component because isn't the centripetal acceleration directed horizontally instead of parallel to the incline and wouldn't the friction force be ...
October 5, 2010

Statistics
0.0213
August 29, 2010

Biology
thanks !
June 3, 2010

Biology
prokaryotes are not found in following kingdoms, except: (a) Monera (b) Protoctista (c) Animalia (d) All of these Help please!
June 3, 2010

Biology
prokaryotes are not found in following kingdoms, except: (a) Monera (b) Protoctista (c) Animalia (d) All of these Help please!
June 3, 2010

Chemistry
Opps... spelled Chemistry wrong.
May 12, 2010

Chesitry
Calculate the energy needed to melt 50.0 L of nitrogen (N2).
May 12, 2010

Algebra
(2*x)(4*y)=192
May 11, 2010

math
In a test, the average was 74 points/100 points. After the test, three of students relocate. Then the average was 75 points/100. The circumstances of the students were 6:5:3. How many points did the three students have? I know the answere is 45, 75 and 90, but can you write ...
May 11, 2010

math
In a test, the average was 74 points/100 points. After the test, three of students relocate. Then the average was 75 points/100. The circumstances of the students were 6:5:3. How many points did the three students have? I know the answere is 45, 75 and 90, but can you write ...
May 11, 2010

algebra
The countries "Drømmeland", "Erkerivalia" and "Fantasia" had a competition. Please tell me how maney gold medals the won each with these sentences. 1. They won 17 medals in all 2 "Erkerivalia" won three times more medals than &...
May 11, 2010

sicence
If you place a metal ring in a region in which a magnetic field is rapidly alternating, the ring may become hot your touch, why? be as specific as you can
May 2, 2010

Math
Barter question: name will give for a 1 marble 2 paper clips m 2 marker 1 pencil r 5 notepads 4 markers l 1 pencil 5 paper clips g 3 erasers 5 notepads Question how does a get erasers?
April 26, 2010

math
Logarithm!!! Select all of the following that are true statements: (a) log(2x) = log(2) + log(x) (b) log(3x) = 3 log(x) (c) log(12y) = 2 log(2) + log(3y) (d) log(5y) = log(20y) – log(4) (e) log(x) = log(5x) – log(5) (f) ln(25) = 2ln(5) (g) ln(1) = log(1) (h) ln(e) = ...
April 16, 2010

life orientation
Genetically modified foods
April 13, 2010

Stonehenge
Q: How big is Stonehenge? Q: Are some stones on top of other stone? And how were they stacked? Q: How did the stones get there? Q: Did people ever live there? Q: Are the stones heavy? Q: Where is stonehenge?
March 31, 2010

Stonehenge
What do people do at Stonehenge?
March 31, 2010

chemistry
This is super confusing complex brain killing A column packing for chromatography consists of a mixture of two types of particles. Assume that the particles in the batch being sampled are spherical with a radius of 0.5 mm. 36% of the particles appeared to be pink and are known...
March 28, 2010

statistics
A column packing for chromatography consists of a mixture of two types of particles. Assume that the particles in the batch being sampled are spherical with a radius of 0.5 mm. 36% of the particles appeared to be pink and are known to have a polymeric stationary phase attached...
March 28, 2010

Math
Prove that cos2x=(1-tan^2x)/(1+tan^2x) I can't find any identities that can help me with this. I'm really confused
November 8, 2009

math
Haha, I just noticed she asked you to do your own question.
September 16, 2009

math
The question is incomplete.
September 16, 2009

math
38.9 + 5.58 + 7 + 15.8 Significant digits will round to the whole number due to the 7.
September 16, 2009

math156
bobpursley, it's a matter of parenthesis.
September 15, 2009

math156
x/3 = x + 10/6 x/3 - x = 10/6 x(1/3 - 1) = 10/6 x = (10/6)/(1/3-1)
September 15, 2009

sensory organs
External
August 24, 2009

science
Vocal Sounds
June 30, 2009

Social Studies
Why is the First Amendment to the U.S. Constitution so important to us?
February 26, 2009

Chemistry
Based on the balanced equation Al2S3 + 6H2O → 2Al(OH)3 + 3H2S calculate the number of excess reagent units remaining when 4 Al2S3 formula units and 30 H2O molecules react? Molar Mass (g/mol) Al2S3 150.16 H2O 18.015 Al(OH)3 75.361 H2S 34.082 Avogadro's No. 6.022×...
February 20, 2009

physics
solve for H: V=LWH
January 26, 2009

Leadership
Deliverable Length: 1000-1200 words You are excited about your new position as compliance officer at ECG because this is your first role as a member of a senior executive team. You have the enviable opportunity to be a critical part of ECG’s growth as the leader who will ...
January 4, 2009

Marketing class
What is the importance of international trade to a country's economy. Advantages of owning an international business?
May 31, 2008

Economics
it did not help at all. Thanks though.
May 31, 2008

Lemon
Lime
May 28, 2008

math
Given A = {1, 2, 3, 4} B = {2, 5, 10, 17}, a E A and b E B The mapping rule for f maps 1 to 2, 2 to 5, 3 to 10 and 4 to 17 (b) Write the mapping rule in the format of the listing method. Display the mapping using the listing format. (c) Write the mapping rule in the format of ...
October 9, 2007

math
Given A = {1, 2, 3, 4} B = {2, 5, 10, 17}, a E A and b E B The mapping rule for f maps 1 to 2, 2 to 5, 3 to 10 and 4 to 17. (A) Write the mapping rule in the format of the listing method. Display the mapping using the listing format. (B) Write the mapping rule in the format of...
October 9, 2007

Algebra
law of indices
September 26, 2007

Arts/social science
What is the relevance of academic study of the Bible today,especially in African context? Define Ethics and show how it relates to Epistemology. Here are previous answers to these very same questions: http://www.jiskha.com/display.cgi?id=1187166711 http://www.jiskha.com/...
August 20, 2007

University of Botswana
Define Ethics and show how it relates to Metaphysics and Epistemology. Check these sites. http://en.wikipedia.org/wiki/Ethics http://en.wikipedia.org/wiki/Epistemology http://en.wikipedia.org/wiki/Metaphysics Why are we here on Earth? What is our Purpose? How do we relate to ...
August 15, 2007

University of Botswana
What is the relevance of the academic study of the Bible today,especially in African context. One of the controversies concerns the actual location of the kingdom of Sheba; some scholars say it was in Ethiopia (Africa) and others claim it was in Yemen (Asia). The location of ...
August 15, 2007

math
can anyone help please, i need a simple formula for working out taxes.if i had any number i need to know what the base was before 16% tax was added. i know the formula if the tax was 17.5%,what ever the total is if you divide that by 47 then x that by 7 that will give you the ...
April 15, 2007

maths
can any one tell me a way of working out a percentage from a total for tax purposes. Example; if i have a total of 78 and the tax was 17.5% it would be 78 divide 47 x 7 =11.61 can anyone tell me how to work it out if the tax was 16% thanks "78 divide 47 x 7 =11.61 "...
April 8, 2007

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