Thursday
October 23, 2014

Posts by Alan


Total # Posts: 325

physics
Brightness also refers to intensity, or # of photons, what determines the kinetic energy of the ejected electrons is frequencey, as each photon releases 1 electron, if the photon has enough energy to overcome the work function, the remaining energy is then transformed into the...
December 5, 2009

12th grade
This is probably waaaaay to late, but period can be determined using b=180/p b=3 period is 60
November 15, 2009

Physics 30
Thanks
November 11, 2009

Physics 30
I got stuck after i attempted to use 1/f=1/di+1/do, seeing as how i need di, which i dont have.
November 11, 2009

Physics 30
An object located in front of a concave mirror with a radius of curvature of 80 cm produces an invert image that is three times the size of the object. Calculate the distance between the object and the mirror.
November 11, 2009

Physics
A 75 g autographed baseball slides off of a 1.3 m high table and strikes the floor a hori- zontal distance of 0.65 m away from the table. The acceleration of gravity is 9.81 m/s2 . What was the direction of the ball’s velocity just before it hit the floor? That is, at ...
November 9, 2009

Physics
What was the direction of the ball’s velocity just before it hit the floor? That is, at what angle (in the range −90◦ to +90◦ relative to the horizontal directed away from the table) did the ball hit the floor? Answer in units of ◦.
November 9, 2009

Physics
I have the same problem and I can't figure it out the answers on these forums are useless
October 21, 2009

College Algebra
Mendoza Manufacturing plans to producea one compartment vertical file by bending the long side of a 10-in. by 18-in. sheet of plastic along two lines to form a U-shape. How tall should the file be in order to maximize the volume that it can hold?
October 4, 2009

Math
yes it is take 30 times 7865 and you get 235950
October 4, 2009

3rd grade
An big idea would end in a huge result and also could take a lot of other accomplishments to get to it. A small idea is easy to obtain over a short period of time. An example is a sports team. If they have the goal of winning the state tournament at the end of the year they ...
October 4, 2009

Global History
Identify Jacobins
September 28, 2009

sociology 120
I need help with today's assignment in intro to Sociology120. The assignment is urbanization trends
August 21, 2009

math
we square all and evalaute as a diff of 2 squares
August 16, 2009

Psy 230 Theories of Personality
Use Appendix b to list at least five of the events or major concepts in each of the three historic periods of personality psychology.
July 18, 2009

Literacy
I dont exactly live in america, but im in year 5, which i think is grade 5 in america. But i have a really desperate question i need to ask.... When a word ends in "Phobia" what kind of word is it? is it a noun, adjective verb? can you please tell me?
June 2, 2009

Chemistry
This is the last one Dr Bob! How much concentrated 18 M sulfuric acid is need to prepare 250 ml of a 6.0 M solution? Im stumped again, could you point me in the right direction ? Thank you sir!
May 28, 2009

Chemistry
How much concentrated 18 M sulfuric acid is need to prepare 250 ml of a 6.0 M solution? This is the last one guys, its got me stumped again =)
May 28, 2009

Chemistry
What is the molality of a solution made from 5.61 moles of KCl and 2.11 kg of water? I'm very lost on this one, could someone please help me?
May 28, 2009

finance
answer to your question you take collection cost 5% of new sales which is 4,000 add 16,000 which is your a/c fiqure you got sales divided by a/c turnover which equal 20,000 which is your inventory..
May 13, 2009

MATH
A simple ratio can be used 18 45 --- = --- X 60 18 x 60 ------- = 24 pages 45
May 10, 2009

Term paper
So I could word it.. Nearly every country of the world uses some method of hydroponics, either on a small or large scale.
May 10, 2009

Term paper
Nearly every country of the world uses some method, either on a small or a large scale , of hydroponics. Is this written correctly? Does any one want to help me proof read my term paper?
May 10, 2009

Spanish
eodns These are the letters to a spanish word what does it spell?
April 30, 2009

History of English Economics
What kind of Cammand is China
April 15, 2009

Term paper Research
i don't know if you remember me. But I am the one that is doing the term paper over hydroponics. I have found a couple of really good sites thanks to one of the homework helpers. but i really need magazine articles about hydroponics. I have found a couple of text books I ...
April 5, 2009

Spanish
It is not my eyes look incredible terms: snow on the almond bloom snow on snow. This winter my mood is like an early spring, is like an almond tree in bloom under the snow. There are too cold this evening in the world. But I open the door to my dog and he comes home heat ...
April 5, 2009

8th grade
Drive a car around a big circle track.
April 2, 2009

Algebra
see michelle's answer
April 2, 2009

Algebra
(1) ------------- 25x^2 + 22xy - 3y
April 2, 2009

Algebra
take the interest rate divided by (100 times the compounded) add one take that answer to the (number of years times teh compound) multiply this entire total times money times dollars invested
April 2, 2009

Pre Algebra
what are you asking??? i think i might know but make it more clear.
April 2, 2009

vocabulary
Whats an word for everyday language? not english. a vocab term
March 30, 2009

Everyone read!!!
Well its great to hear that your not a part of an illegal indoor hydroponics but thank you Ms. Sue for the websites they helped a lot and drwls your answer gave me ideas for my paper. Its not due till the end of April. Thanks all and if anyone has any other ideas go ahead and ...
March 25, 2009

Everyone read!!!
I have to write a term paper for two classes. the teachers are letting us students write only one but the topic has to be scientific. It is going to be 10-12 pages long double spaced. I was thinking Hydroponics but I am worried that I might get bored after 5 pages... Any ideas...
March 25, 2009

social studies/history
Who was the first president to state the inauguration and how old was he at the time?
January 21, 2009

finance
If exchange rate depreciate, what will happen to the parent company NPV of foreign cashflow?
January 10, 2009

Global
Who Was Affected By the Historical event In The medieval time
January 2, 2009

American Literature
I amd writing a paper over how mark twain uses satire to criticize religion. My opening statement is: Helping a slave runaway and floating down the Mississippi river accompanied by two conmen appears to be the basis of a real adventure tale. My teacher has asked me to ...
December 17, 2008

History Paper
My summary is over an article about the battle of Khe Sanh, shoe i have my interduction begin with statistics of the end of the battle to attract readers and build up to the thesis or begin with my thesis about the major contreversory behind the battle and focus on it.
November 20, 2008

Need many responses
I have a history teacher that wants a paper over my article explaining who , what , when, where, why and how. The fact is these articles are short and two students turn in 3 paragraphs for a summary. . . long summary. and was given another page worth of info needed to add in ...
November 20, 2008

grammar
The lion said to hare. Ah you have come at last
November 9, 2008

Physics
807.4 N ?
October 10, 2008

Professional Ethics
In professional ethics there are holism and separatism.holism, use your imagination to present three examples of people whose strong personal commitments to 1) honesty, to 2) loyalty, and to 3) generosity carry over into their professional lives. you have to come up with an ...
August 29, 2008

Algebra 3 check only
(2^-3)(x^0(x^2)) all over _______ (x^-3)(xy^-3)(y) does it equal x^2)(xy^3)(x^3) ______________ 8y
August 19, 2008

FINE THEN NO ONE HELP ASAP
THANKS A LOT PPL
March 28, 2008

HELP CLASS IS ALMOST OVER ASAP
Hurry
March 28, 2008

Algebra Need answers ASAP
What is the factored form for a Quadratic Function with it vertex at teh origin?
March 28, 2008

Math
What is the Median of the Following Numbers 80, 80, 80, 90, 90,100
March 24, 2008

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 teh 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 teh 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 didnt 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

Pages: <<Prev | 1 | 2 | 3 | 4 | Next>>

Search
Members