Monday
December 5, 2016

# Posts by Yu

Total # Posts: 27

Maths
2/5 of the boys don't know how to swim, so 2/5 * 1/3= 2/15 of the total people are boys who cannot swim. Likewise for girls, 3/5 * 2/3= 6/15 of the total people are girls who cannot swim. Thus, 1- 2/15 - 6/15= 7/15 of the total people are swimmers. Thus, there are 490 ...
July 9, 2014

Math
Parametrically represent a Mobius strip. Since I am very unfamiliar with this topic, Math jargon should appear as little as possible and please provide step by step working.
July 9, 2014

Math logarithms
The graph, y=lg x is rotated 90 degrees anticlockwise around the origin. What is the equation of the new graph? Please provide proof.
April 30, 2014

Chemistry
Which method(High Performance Liquid Chromatography or Gas Liquid Chromatography) would be suitable for the separation of the following mixtures? 1) Mixture of paracetamol, codeine and caffeine. 2) Mixture of alpha-pinene, beta-pinene, eucalyptol, alpha-terpineol. Please ...
January 12, 2014

Chemistry
How is the high performance liquid chromatography column designed to ensure greater efficiency?
January 11, 2014

Chemistry
How can reaction intermediates in an organic synthesis be separated and recovered using thin layer chromatography?
January 11, 2014

analytic
11/2 and 9/2
November 26, 2013

Engineering
Thanks simonsay, in q1_2_1: 300 is wrong for me, is there maybe a -300?
May 23, 2013

Engineering
Trustee thanks the first two answers right but third one is wrong, can you check please?
May 23, 2013

Physics
Can someone explain with values for I = dQ/dt please?
May 22, 2013

Physics
BoobleGum, what is the value for U please?
May 22, 2013

Physics
Help!
May 8, 2013

math
In a manufacturing process, each item leaving an assembly line will be examined by two inspectors: A and B individually. Based on past experiences, Inspector A detects 60% of the defective items. If the defective items are not detected by Inspector A, 90% of them will be ...
April 9, 2013

Quantum Physics
March 24, 2013

Quantum Physics
March 24, 2013

maximize p = 2x+3y subject to 1.25x+y<=100 x+y>=30 x<=50 y<=75 x>=0 y>=0) graphic method for linear programing
January 20, 2013

Computer Science
I need some help about Turing Machines, and prove by reductions. Here are the 2 questions: 1. Sketch the construction of a Turing Machine that decides the language L = a^i where i is not prime. 2. Show that the language 2Strings is not recursive by reducing any one of the two ...
December 8, 2012

calculus
Tower 1 is 90 ft high and tower 2 is 40 ft high. The towers are 200 ft apart. A guy wire is to run from point A to the top of each tower. [See a picture of this situation on page 274 of the textbook.] How many feet from tower 1 should point A be so that the total length of guy...
November 9, 2010

Calculus
Use Chain Rule 1=cos(xy^2)(y^2+2xyy') 1=cos(xy^2)y^2+(2xy)cos(xy^2)(y') [1-cos(xy^2)y^2]/[(2xy)cos(xy^2)]=y'
November 9, 2010

english
can anyone give me a thesis statement on conscience in hamlet. pls
April 21, 2010

literature
An effort to bring civilization with them... I just took the test. This answer is 100% correct, I promise!
May 19, 2009

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