Monday
May 2, 2016

# Posts by Dirk

Total # Posts: 19

Physics
I think I might be on the right track, if someone could let me know if this is correct I would greatly appreciate it. A 51 kg diver is spinning forward in a tuck position at 1.9 rev/s, as shown in Fig. 13-38a. In this position, the diver's rotational inertia is 3.3 kg&...
November 9, 2012

Biochemistry
you know the pH of HNO3 to be 3.4 use pH=-log [] 10^-3.4= ?
January 24, 2011

biochemistry
the equation will look like this: pH=7.20+log 0.4/0.2 = 7.50 Yes?
January 21, 2011

biochemistry
Sorry the final pH of the mixture is 7.50, is that correct DrBob222?
January 21, 2011

biochemistry
pH=7.20+log 0.2M/ 0.4M pH=7.20+(-0.30) pH=6.69 I'm heading in the right direction?
January 21, 2011

biochemistry
pH=7.20+log0.1M/0.1M pH=7.20
January 21, 2011

biochemistry
pH= pKa + log 0.1M/0.1M what's the pKa value?
January 21, 2011

biochemistry
what's the pKa?
January 21, 2011

biochemistry
if 4 volumes of 0.1M monobasic potassium phosphate, KH2PO4, are mixed with 2 volume of 0.1 M dibasic sodium phosphate, Na2HPO4, what will be the pH of the mixture? What if 4 volumes of 0.1 M KH2PO4 are mixed with 8 volumes of 0.1 M ethanolamine base(pka=9.44) what will be pH ...
January 21, 2011

chemistry
CO (g) + Cl2 (g) ↔ COCl2 (g In one experiment, 0.93 bar of CO was combined with 1.01 bars of Cl¬2 in a reaction vessel at 700K. After the system reached equilibrium, the total pressure was 1.24 bars. Calculate Kp0 for the system.
November 17, 2010

math
x = 1 1/3
October 7, 2007

Trigonometry
I need to prove that the following is true. Thanks. csc^2(A/2)=2secA/secA-1 Right Side=(2/cosA)/(1/cosA - 1) = (2/cosA)/[(1-cosA)/cosA] =2/cosA x (cosA)/(1-cosA) =2/(1-cosA) now recall cos 2X = cos^2 X - sin^2 X and we could say cos A = cos^2 A/2 - sin^2 A/2 and of course sin^...
April 17, 2007

Chemistry
What is the common characteristic of the electron configurations of the elements Ne and Ar? Both have eight electrons in the outside shell.
November 12, 2006

english
I have a question about The Adventure of Huckleberry Finn. Why are Huck and his father living separately? http://en.wikipedia.org/wiki/Adventures_of_Huckleberry_Finn
November 11, 2006

what are three advantage of advertising? I can't think of anything. Suppose you owned a new company with a superior product no one ever heard of your product and you needed to help customers learn about its advantages. Or suppose you had to get rid of a lot of unsold goods...
November 8, 2006

what is the example of institutional advertising? I have tried to find it, but i couldn't. someone please help me. Here's the definition: (Broken Link Removed) A good example is the ubiquitous McDonald's arches. Even very young children associate these arches with ...
November 8, 2006