Saturday
December 3, 2016

Posts by Alan

Total # Posts: 376

Advance Physics
9.8m/s
March 6, 2008

Business
I have searched and searched but I can't find examples of companies that product's image has been made or broken through Advertisement. Any ideas on Products hurt or helped by advertising?
March 3, 2008

drbob222
Thank You!
February 5, 2008

chemistry
I just made the neg to a pos and finished the problem. I got pH=6.3 for a final answer. hope that is what you came up with.
February 4, 2008

chemistry
Here are instructions on how to solve it. Would you help me step by step with the math and instructions?: Heres how to solve it: Use the Henderson-Hasselbalch equation. pH = pKa + log ([Tris] / [Tris HCl]). Here the pH is 8 and the pKa of the Tris is 8.3, so you can solve for ...
February 4, 2008

chemistry
0.1 M means 0.1 mol/liter
February 4, 2008

chemistry
TRIS is a buffer used in biochemistry
February 4, 2008

chemistry
An enzyme-catalyzed reaction is carried out in a 50-mL solution containing 0.1 M TRIS buffer. The pH of the reaction mixture at the start was 8.0. As a result of the reaction, 0.002 mol of H+ were produced. What is the ratio of TRIS base to TRIS acid at the start of the ...
February 4, 2008

chemistry
here is how to solve the problem, put I need help following these instructions. would you show me the math step by step, so I could understand? Here is how to solve the problem: Use the Henderson-Hasselbalch equation. pH = pKa + log ([Tris] / [Tris HCl]). Here the pH is 8 and ...
February 3, 2008

chemistry
This is my third time to ask this and no one has answered. Please help. An enzyme-catalyzed reaction is carried out in a 50-mL solution containing 0.1 M TRIS buffer. The pH of the reaction mixture at the start was 8.0. As a result of the reaction, 0.002 mol of H+ were produced...
February 3, 2008

chemistry lab
An enzyme-catalyzed reaction is carried out in a 50-mL solution containing 0.1 M TRIS buffer. The pH of the reaction mixture at the start was 8.0. As a result of the reaction, 0.002 mol of H+ were produced. What is the ratio of TRIS base to TRIS acid at the start of the ...
February 2, 2008

chemistry
An enzyme-catalyzed reaction is carried out in a 50-mL solution containing 0.1 M TRIS buffer. The pH of the reaction mixture at the start was 8.0. As a result of the reaction, 0.002 mol of H+ were produced. What is the ratio of TRIS base to TRIS acid at the start of the ...
February 2, 2008

chemistry
Here are 2 questions I worked out, but need them checked. Also, can't get answer to another question correct unless question 1 is correct. Would you check the first 2 and help me with the third? 1) What is the pH of a 0.05 M solution of TRIS acid (pka = 8.3)? My answer: I ...
February 2, 2008

Algebra 2 - Direct Variation
I already did this problem but i decided to check my self since my answer wasn't withthe status quo of the rest of the answers i checked twice and got the same answer. But will someone double check me. The designers fo the Parthenon, a Greek Temple completed in 432 B.C., ...
January 23, 2008

math
Divide the 2 to both sides of the fits equation making a = 4 then Subsituted the 4 for a in the second equation making it 4+B=2 then subtract the four from both sides making the equation B equels -2
January 9, 2008

Algebra II
Buggs made the trip at 40 mph during the first Hiatus. Joan Made the same trip at 50 mph during the second hiatus. How long was the trip if it took Buggs 2 hours longer than it took Joan. I know the Distance equals rate X Time and I tried using that meathod three times but i ...
January 2, 2008

physics
Gauge Pressure(P) = Density(p) x gravity(g) x height(h) 1.33x10^4Pa = 1.02* x 9.8m/s x h *: Specific gravity = ratio of density of solution to water .:. Density = 1.02(no units) .:. h = 1.33x10^4 / 1.02 x 9.8 = 1330.5m^3 = 1.33m
December 16, 2007

english
1. b 2. a 3. c 4. c 5. a 6. b 7. a 8. b 9. d 10. d 11. 12. 13. 14. 15.
November 30, 2007

english
this is a portion of my english homework that i cant do. i was assigned over 100 questions and these are the ones i need the most help with and i need to turn it in in like an hour so any help would be great :-) 1. Which is not a sentence fragment? A. Because I knew she would ...
November 30, 2007

GEOMETRY AGAIN
THIS IS ANOTHER QUESTION I HAVE BEEN STUCK ON FOREVER. I THINK IT REQUIRES TOO MUCH THINKING. PHILLIP WALKED 100 YARDS TO THE EAST WHILE SHONDRA WALKED 155 YARDS TO THE SOUTHEAST. MEANWHILE, 200 YARDS TO THE NORTH, JOSE WALKED 155 YARDS TO THE WEST AND LUYIN WALKED 100 YARDS ...
November 20, 2007

geometry
I HAVE BEEN STUCK ON THIS QUESTION FOREVER. CAN SOMEONE HELP ME OUT WITH IT. DO THEOREMS REQUIRE PROOFS? EXPLAIN EITHER YES OR NO IN ONE OR TWO SENTENCES.
November 20, 2007

geometry
Wrtite the slope intercept form of the equation of the line passing through point (5,1) and parallel to the line y=-4x-2.
October 30, 2007

Algebra II
A train left Podunk and traveled north at 75 Km/h. Two hours later, another train left Podunk and traveled in the same direction at 100 km/h. How many hours had the first train traveled when the second train overtook it?
October 29, 2007

geometry
ok i get it now i just didn't know what he was saying at first but now I know thanks.
October 26, 2007

geometry
Write the slope intercept form of the equation of the line passing through the points (-2,4) and are perpendicular to the line y=-3x+3.
October 26, 2007

geometry
Write the slope-intercept form of the equation of the line passing through the point (5,1) and parallel to the line y=-4x-2.
October 26, 2007

Geometry again
Write the slope-intercept form of the equation of the line passing through the point (5,1) and parallel to the line y=-4x-2.
October 26, 2007

Geometry
so the answer must be A right
October 26, 2007

Geometry
Which best describes the relationship between the lines with equations -16x+2y=0 and -x-8y=-2? a. neither parallel nor perpendicular b. parallel c. same line d. perpendicular
October 26, 2007

geometry
Which is the slope of a line perpendicular to the line 4x-2y=5?
October 26, 2007

Algebra
Do you distibute the 7 to the top, bottom, or both.
October 15, 2007

writing
Wow Everyone agrees! ^^
October 15, 2007

writing
Interesting choice, I would have totally choose a republic, LOL, but If you wnat you could write it in the view of yourself. Put personal things into it, but not, date it as a journal entry, maybe just relax and let you brain think of what you want ot write.
October 15, 2007

Government
For my class I have to have a good spy story. Basically one that got caught. I have found some but my classmates got to the teacher before me. does anyone know of any good sites that I could use
October 15, 2007

Chemistry
yay i have a good idea ^^
October 15, 2007

Chemistry
Maybe you can find a picture of it on the internet and post the url for everyone to click on to see
October 15, 2007

math
well a hint is that it starts with a vowel because before the line a an is written showing that is starts in a A, E, I, O or U
October 15, 2007

math
48 cans
October 15, 2007

Help please!!
She usually gives written tests with not diagrams
October 11, 2007

Help please!!
thank you
October 11, 2007

Help please!!
I am currently inrolled in a biology class, I pay attentionin class, I take all the notes possible, I study for the test at least 4-5 days in advance. I am putting 110% of my effort into this class. I am an A student but I am getting d's on the tests. I don't know what...
October 11, 2007

math test
Well, If you have your book from the class, I always find it helpful to re-read the chapters that the teacher told me to study as a reminder and try to memorize the important facts. Also see if you can find any questions over what you need to study on the internet and solve ...
October 11, 2007

Algebra 2
I have just found Jiskha but i will remember for the rest of my high school carreer
October 11, 2007

Algebra 2
thanks
October 11, 2007

Algebra 2
thanks now how did you solve it what did you do?
October 11, 2007

Algebra 2
Where do the following lines meet on a coordinate system? e.g. (x,y) x+3y=4 2x-y+8
October 11, 2007

geometry
Name the property which justifies the following conclusion: given: 3q+9r conclusion: 3(q+3r)
October 3, 2007

geometry
Name the property which justifies the following conclusion: given: 3q+9r conclusion: 3(q+3r)
October 2, 2007

geometry
Choose the phrase that completes the following statement as stated by the point, line, and plane postulates: Once plane___________ passes through three noncollinear points. a. never b. sometimes c. always d. point, line, and plane postulates do not address this topic directly.
October 2, 2007

geometry
i kinda accidentally put up the question up 3 times
October 2, 2007

geometry
yes
October 2, 2007

geometry
Choose the phrase that completes the following statement as stated by the point, line, and plane postulates: Once plane___________ passes through three noncollinear points. a. never b. sometimes c. always d. point, line, and plane postulates do not address this topic directly.
October 2, 2007

geometry
Rewrite the statement in if-then form. All equilateral triangles have three congruent sides. a. a figure has three congruent sides if and only if it is an equilateral triangle. b. a figure is an equilateral triangle if and only if it has three congruent sides. c. if a figure ...
October 2, 2007

geometry
Decide which one of the following statements is false. a. any three points lie on a distinct line. b. three noncollinear points determine a plane. c. a line contains at least two points. d. through any two distinct points there exists exactly one line. my best guess would have...
October 2, 2007

geometry
i was in honors in jr. high and my new high school doesn't offer it so i'm stuck in just regular geometry. I also think algebra 2 is easy it is just that geometry gets you sometimes.
October 2, 2007

geometry
yes i'm correct for once
October 2, 2007

geometry
Refer to the following statement: Two lines are perpendicular if and only if they intersect to form a right angle. A. Is this a biconditional statement? b. Is the statement true? this is what I put a. yes b. yes
October 2, 2007

geometry
thank you very much
October 2, 2007

geometry
Which of the following is an example of transitive property? a. If x=5, then x-2=5-2 b. If x+5=y and y=-2, then x+5=-2 c. x+5=x+5 d. If y=x-2, then x-2=y my answer is B. That is my best answer to this question because my book doesn't adequately explain what transitive ...
October 2, 2007

geometry
ok i'll start doing that from now on
October 2, 2007

geometry
oh i get that alot
October 2, 2007

geometry
i'm trying i'm just posting the questions up so I can compare other peoples work to mine to see if im correct cause i don't want to turn in my homework and get an f again
October 2, 2007

geometry
Rewrite the biconditional as a conditional statement and its converse and then determine if the biconditional is an accurate definition: Two angles are supplementary if and only if they form a linear pair conditional:_____________________________ converse:...
October 2, 2007

geometry
i thought it was that answer too but i thought the answer was just too simple to be true
October 2, 2007

geometry
it doesn't make sense to me either that's why i'm posting the question up
October 2, 2007

geometry
Write the converse: If p, then q.
October 2, 2007

geometry
yes thank you
October 2, 2007

geometry
Rewrite the postulate in if-then form. "A line contains at least two points."
October 2, 2007

Chemistry
compute volume and/ or weights of reagents to make the following solution. Desired concentration: 22 ug/mL bovine serum albumin Desired quantity: 100 mL Given: 95% bovine serum albumin I'm not sure how to do this so any help would be great. Thanks!
September 18, 2007

Chemistry
compute volume and/ or weights of reagents to make the following solution. Desired concentration: 40% NaOH + 4% Na2S2O3 Desired quantity: 1500 mL Given: 90% w/w NaOH, pure Na2S2O3 I'm not sure how to do this so any help would be great. Thanks!
September 17, 2007

chemistry
compute volume and/ or weights of reagents to make the following solution. Desired concentration: 40% NaOH + 4% Na2S2O3 Desired quantity: 1500 mL Given: 90% w/w NaOH, pure Na2S2O3 I'm not sure how to do this so any help would be great. Thanks!
September 16, 2007

chemistry
Determine the molarity of 30% (w/w) KOH of specific gravity 1.29. Thanks for any help.
September 10, 2007

Chemistry
I have a table that has the vapor pressure of water at selected temperatures. It is converted from celsius to torr. For example: 18°C = 15.5 torr 19°C = 16.5 torr Unfortunately, the temperature I got is 18.5°C. How do I convert it to torr? The book has no equation ...
March 30, 2007

voc electronics
what happens when iron is heated It gets hot. Ha, Ha. But I'm sure you didn't want that for an answer. Please be more specific about what you are looking for and I can refine that answer for you.
February 27, 2007

social studies
ways and need to preserve and protect monument like konark and sanchi http://www.jiskha.com/display.cgi?id=1150207722.1150232150
September 1, 2006

To Dr.Bob
what up?!
June 11, 2006

  1. Pages:
  2. <<Prev
  3. 1
  4. 2
  5. 3
  6. 4