Saturday
April 18, 2015

# Posts by josh

Total # Posts: 1,601

Math
ummmm all 1,000 cuz if each opens and closes all 1,000 should be opened
October 25, 2007

Cell Biology
What organelle does Phalloidin stain? I know it stains actin and the cytoskeleton but these are not organelles.
October 15, 2007

Science
How do you figure out velocity? I don't have a very good teacher.
October 3, 2007

language
thanks! =)
October 2, 2007

language
hi, im doing a project for my language class. can anyone please tell me what is the first line on page 3 in the book curious george goes to a chocolate factory? thanks
October 2, 2007

Biochemistry
The following data describe the binding of oxygen to human myoglobin at 37oC. P02 (mm Hg) = 0.5 1 2 3 4 Theta = .161 .277 .434 .535 .605 P02 (mm Hg) = 6 8 12 20 Theta = .697 .754 .821 .885 From these data, estimate: a). P50 b) the fraction saturation of myoglobin at 30 mm, the...
September 28, 2007

math
a) 1/4 b) 25
September 28, 2007

accelerated math
just plug ti into ur calculator (32/4)x(31/4)
September 27, 2007

percalculus
i need like a copy of the ch 2 review for my book
September 27, 2007

Mathematics 1
divide 225 by 5 then that gives u 1/5 witch is how much u need
September 27, 2007

Biology
Has anyone done this experiment before? I need help with the final results. What would happen when I place 2 mL of hydrogen peroxide into 5 test tube, add manganese dioxide powder to the first one, then add sand to the second one, liver to the third one, and ground liver to ...
September 26, 2007

biology
I have another experiment that I am not clear about the results. Any help? Put water, hydrogen proxide, and manganese dioxide powder in test tube, see what happens. Then put sand in the mixture. Results? Then,put liver in it. What happens? Thanks for helping.
September 22, 2007

biology
Subjects Art Business Computers English Foreign Languages Health Home Economics Mathematics Music Physical Education Science Social Studies Features Contribute Download Experts Forum Job Openings Homework Tips Libraries.Jiskha Link to Us Reference School Supplies Search ...
September 22, 2007

biology
I have another experiment that I am not clear about the results. Any help? Put water and manganese dioxide powder in test tube, see what happens. Then put sand in the mixture. Results? Then,put liver in it. What happens? Thanks for helping.
September 21, 2007

biology
Thank you very much. I have tried it, and wanted to know if others had gotten the same results.
September 21, 2007

biology
What will happen when you mix saliva, water, gelatin? Then, mix starch, water, iodine?
September 21, 2007

Lincoln School
what is a polygon?
September 13, 2007

science
i have to do a homework assignment on how the earths orbit and tilt are causing global warming and i cant find anything but greenhouse effect please help. i gotta turn this in tomarrow
September 11, 2007

math
what is 8.9 times 3.87
August 27, 2007

Chemistry
Thanks christina, for all your help. Also, in case you check, 12.6 / 14.26 = 88%.
August 23, 2007

Chemistry
0.0626(1 / 1) = 0.0626, then 0.0626(1 / 227.78) = 0.00027 is the theoretical yield? (227.78 is the molec weight?)
August 23, 2007

Chemistry
And the limiting reactant is CuSO4 since I have enough NH3?
August 23, 2007

Chemistry
So 0.0626(4 / 1) = 0.2504 mole NH3 and 1.76(1 / 4) = 0.44 mole of CuSO4?
August 23, 2007

Chemistry
And the limiting reactant is CuSO4?
August 23, 2007

Chemistry
So I have 10/159.62 = 0.062 moles, and 30/17.034 = 1.761 moles?
August 23, 2007

Chemistry
Ok, well, I have 1 mole of CuSO4 and 4 moles of NH3, correct?
August 23, 2007

Chemistry
Uh, christina, you just told me how to find the limiting reactant, not the theoretical yield.
August 23, 2007

Chemistry
Ok, I will. Also, could someone tell me how to find the theoretical yield, since I'm apparently doing it wrong for some reason.
August 23, 2007

Chemistry
Ok. For the theoretical yield I added up the atomic masses for CuSO4 + 4 NH3. Cu (12.01) + S(32.07) + O4(64.00) + (NH3(17.04) * 4 = 68.16) = 176.24. Am I finding the theoretical yield the wrong way?
August 23, 2007

Chemistry
I have a problem that has been driving me crazy trying to solve, and I was wondering if someone could help. The problem is this: "Given the reaction: CuSO4 + 4 NH3 ----> Cu(NH3)4SO4, if 10 grams of CuSO4 reacts with 30 grams of NH3, what is the theoretical yield of Cu(...
August 23, 2007

Chemistry
What I mean to say is I add up the atomic masses of CuSO4 + 4 NH3 and get the theoretical yield of 176.24. Or am I finding it wrong?
August 23, 2007

Chemistry
I add up the atomic masses and get the theoretical yield, it's finding the limiting reactant that is getting to me.
August 23, 2007

Chemistry
I have a problem that has been driving me crazy trying to solve, and I was wondering if someone could help. The problem is this: "Given the reaction: CuSO4 + 4 NH3 ----> Cu(NH3)4SO4, if 10 grams of CuSO4 reacts with 30 grams of NH3, what is the theoretical yield of Cu(...
August 23, 2007

Math
how many centimeters is in a meter
June 26, 2007

Calculus - Hydrostatic Pressure
June 26, 2007

economy
total cost is equal to what? It would be easy to read your brief question out of context. So, a brief answer to your brief question: Generally speaking, total cost is the sum of fixed costs and variable costs. Do you have a specific problem you are trying to solve?
June 1, 2007

science
Im confused on what the carbon cycle is. can I get a somewhat in depth definition? http://images.google.com/images?q=carbon+cycle&hl=en&ie=UTF-8&um=1&sa=X&oi=images&ct=title http://www.cotf.edu/ete/modules/carbon/efcarbon.html http://users.rcn.com/jkimball.ma.ultranet/...
June 1, 2007

Math
2/3 4/10/ 3/12
May 17, 2007

Physics- really fun!
who cares
May 7, 2007

chemistry
[HNO2] = .0410 M [NaNO2] = .0250 mol / .250 L = .100 M [H+] = Ka x [HA (weak acid)] / [A- (conj. base)] Ka = 6.0 x 10^-4 (a given constant) [H+] = (6.0 x 10^-4) x [.041]/[.100] = 2.5 x 10^-4 M. pH = -Log[H+] -- pH = -log[2.5 x 10^-4] pH = 3.61
April 29, 2007

Math
I need to make one graph showing changes in population for deer and wolves. I'm stuck because the deer scale would go by 500's. but the wolves are very small and would go by 2's! I have no idea how i can make my y-axis of my graph! any ideas? Two options really. 1...
April 2, 2007

sciencie
hey i have a question what are the two requirements of mater and can matter exist at 0 kelvin Didn't I answer this before? What do you mean by requirements? like what does it need like mass volume like what does it need like mass volume like what does it need like mass volume
March 25, 2007

sciencie
hey i have a question what are the two requirements of mater and can matter exist at 0 kelvin yes, matter exists at 0 K, it's just really cold.
March 25, 2007

spelling
need a tongue twister out of these words stitch,switch,speech,stretch,scratch During my speech, I wanted to stretch to reach the switch to scratch the itchy stitch. <G> Say that three times really fast.
March 22, 2007

science
Posted by Josh on Saturday, March 17, 2007 at 10:58pm. How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? For Further Reading science - DrBob222, Saturday, March 17, 2007 at 11:07pm 1. Write the ...
March 18, 2007

science
How many grams of hydrochloric acid are required to react completely with 4.30g of zinc? How many molecules of gas will be produced? 1. Write the balanced chemical equation. Zn + 2HCl ==> ZnCl2 + H2 2. Convert grams Zn to mols. mols = grams/atomic mass Zn. 3. Using the ...
March 17, 2007

english
What is the correct punctuation for this sentence? Free of the restrictions of the real world,her characters reveal theirselves like they truly are. That punctuation is correct. Although the punctuation is correct, there are errors in the sentence. It should read this way: ...
March 7, 2007

Social Studies
Could anyone tell me 2 different colonial governments before America declared its independence. Thanks Each of the 13 colonies had its own government before the American independence.
January 27, 2007

greek mythology
1.All the following were writers of ancient Greek plays and poetry exept a.Homer b.Sophocles c.Joseph Campbell 2.Chaos gave birth to the following exept a.Uranus(heaven) b.Tartarus(under earth) c.Gaea(earth) 3.Gaea gave birth to the following exept a.mountains b.Pontus(sea) c....
January 22, 2007

english
if i called my boat "the hurcules,"would that be an allusion? Please tell us why you're calling your boat "the hurcules." Do you mean Hercules? i dont know why its a question i got but pretty sure its the Hurcules from mythology http://en.wikipedia.org/...
January 22, 2007

english
is the connotation of "mother" positive? Do you get good feelings from the use of the word or not? ??
January 22, 2007

english
is the connotation of "rose" positive? why? Which "rose" are you referring to? noun (the flower) verb (to get up) ?? noun The noun, rose, is generally positive, except in the Wars of the Roses. so what would i write for why its positive? A rose is a ...
January 22, 2007

spelling
words with consonant blends are easy to spell, because?
January 16, 2007

spelling
man: woman ::curved :?
January 16, 2007

History
I have been looking for the anwers to the follwing questions. I need to compare the following types of governments Democratic, Dictatorial and Parliamentary. I need to know the type of leader for each, economic system, and governing body. Thanks in advance. I am giving you ...
January 5, 2007

math
how do you add and subtract and multiply and divide fractions? I searched Google under the key words "fractions add subtract multiply divide" to get these possible sources: http://www.wtamu.edu/academic/anns/mps/math/mathlab/beg_algebra/beg_alg_tut3_fractions.htm ...
December 14, 2006

Question: Calculate the frequency of the AA, Aa, and aa genotypes after one generation if the initial population consists of 0.2 AA, 0.6 Aa, and 0.2 aa. What I have done is: P = (0.2)+(0.5)(0.6)= 0.50 q = 1-p = 1 - 0.50 = 0.50 Can someone check my answer plz.
December 7, 2006

Question: Calculate the frequency of the AA, Aa, and aa genotypes after one generation if the initial population consists of 0.2 AA, 0.6 Aa, and 0.2 aa. What I have done is: P = (0.2)+(0.5)(0.6)= 0.50 q = 1-p = 1 - 0.50 = 0.50 Can someone check my answer plz.
December 6, 2006

Genetics
Question: Calculate the frequency of the AA, Aa, and aa genotypes after one generation if the initial population consists of 0.2 AA, 0.6 Aa, and 0.2 aa. What I have done is: P = (0.2)+(0.5)(0.6)= 0.50 q = 1-p = 1 - 0.50 = 0.50 Can someone check my answer plz.
December 6, 2006

Microbio
Can someone check my answer please? How does the antibiotic penicillin kill bacterial cells? Is it more effective against gram positive or gram negative organisms? Explain. Most bacteria produce a cell wall that is composed partly of a macromolecule called peptidoglycan, made ...
December 5, 2006

Microbio
I have a hard time with this finding the concept for the below: plz help How and in what way does the input of organic matter, such as sewage, effect the O2 content of a river or stream? A pond or lake? Does the organic matter get digested by bacteria, microbes et al? Do they ...
December 5, 2006

music
What types of music did wind bands play ? Marches,church themes is only i can think of Wind ensambles have a huge repatuar in Classical music
November 26, 2006

music
Jazz and ragtime 3)______________ can occur between 2 instruments and can take place at any time Thanks Jazz can be done with 1 instrument, and is all the time. Ragtime requires two to interact, playing off one another.
November 26, 2006

MUSIC
3)_________ CAN OCCUR BETWEEN TWO INSTRUMENTS AND CAN TAKE PLACE AT ANY TIME. 4)A ___________ IS A REPEATED PHRASE. 4. coda is a repeated phrase, There is not enough information in #3 to help you. I would need to know the context. I think it might be harmony but there isnt ...
November 26, 2006

music
the questions are based on the movie called Marsalis on Music Sousa to Satchmo 1)________ is accenting on unexpected beats. 2)what are three major sections of a wind band 1. syncopation is accenting on unexpected beats. 2. woodwind, brasswind and percussion
November 26, 2006

The lord of the flies-English
lets have babies
November 21, 2006

Poetry
I was introduced to the art of poetry two years ago, in the tenth grade, at high school. The first year, I was uninterested. This year, I have become absolutely infatuated with it, but unfortunately, even though I’ve grown to love the art, I hardly understand its ...
November 12, 2006

Watershed?
I'm in FLVS also (SUCKSSSSSSSSS). took me an hr to find it.FINALLY@@@@@@@@
November 1, 2006

Watershed?
Your in FLVS arent you? lol
November 1, 2006

science
you live in the middle of a block that is square and one mile around. there is a stop sign on each corner. if your carcan only accelerate and brake at one meter per second per second, describe how you would get around the block in the fastest way.
October 28, 2006

word problem
A College sold Advance tickets to a play at \$4 per ticket. Anyone who attended and purchased a ticket at the door had to pay \$5 a ticket. A total of 480 people attended the play, and the revenue (earnings) from the ticket sales was\$ 2100. How many people bought tickets at the ...
October 21, 2006

Neon
what is normal phase
October 16, 2006

novel= death on the ice english
it was a really good book
September 22, 2006

Physics
A flat (unbanked) curve on a highway has a radius of 200 m. A car rounds the curve at a speed of 26.0 m/s. What is the minimum coefficient of friction that will prevent sliding? Our professor didn't even go over this, and it is way more complex than anything in the book. ...
September 22, 2006

Physics
An earth satellite moves in a circular orbit with an orbital speed of 5800 m/s. Find the time (expressed in seconds) of one revolution of the satellite. Find the radial acceleration of the satellite in its orbit. I think we need to know the radius of the earth and the ...
September 22, 2006

Trigonometry
I'm confused about how to get the answer of this question. If cosө=0.2, find the value of: cosө + cos(ө+2¡Ç) +sin(ө+4¡Ç) If anyone can help me with this, it would be greatly appreciated. Some of your symbols didn't ...
September 18, 2006

Physics
Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 21.0 m/s as it leaves the hose nozzle. Once it leaves the hose, the water moves in projectile motion. The firemen adjust the angle of elevation of the hose ...
September 17, 2006

Physics
A man stands on the roof of a 19.0 m-tall building and throws a rock with a velocity of magnitude 24.0 m/s at an angle of 38.0 degrees above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock. Got it.... 11.1 m ...
September 17, 2006

Physics
An airplane is dropping bales of hay to cattle stranded in a blizzard on the Great Plains. The pilot releases the bales at 120 m above the level ground when the plane is flying at 80.0 m/s 55.0 degrees above the horizontal. How far in front of the cattle should the pilot ...
September 17, 2006

Physics
I HONESTLY KNOW THAT THIS SITE IS NOT INTENDED TO JUST GIVE ANSWERS, BUT I HAVE NO IDEA HOW TO DO THIS PROBLEM WHATSOEVER, SO PLEASE MAKE NO COMMNENTS LIKE "post some work" OR ANYTHING LIKE THAT...IF I HAD WORK TO POST....I WOULDN'T REALLY NEED HELP... :) Thanks...
September 17, 2006

Physics
A man stands on the roof of a 19.0 m-tall building and throws a rock with a velocity of magnitude 24.0 m/s at an angle of 38.0 degrees above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof reached by the rock. got it.... 11.1 m ...
September 16, 2006

Physics
A river flows due south with a speed of 2.00 m/s. A man steers a motorboat across the river; his velocity relative to the water is 4.20 m/s due east. The river is 800 m wide. What is the magnitude of his velocity relative to the earth? got it....4.65 m/s What is the direction ...
September 16, 2006

Physics
A 10000 N car comes to a bridge during a storm and finds the bridge washed out. The 750 N driver must get to the other side, so he decides to try leaping it with his car. The side the car is on is 21.6 m above the river, while the opposite side is a mere 3.60 m above the river...
September 16, 2006

Physics
A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.30 m/s^2. At 10.0 s after blastoff, the engines suddenly fail, which means that the force they produce instantly stops. How high above the launch pad will the rocket eventually go? got ...
September 16, 2006

Physics
An athlete starts at point A and runs at a constant speed of 5.40 m/s around a round track 250 m in diameter. Find the x component of this runner's average velocity between points A and B. (answer is 3.44 m/s) Find the y component of this runner's average velocity ...
September 13, 2006

Physics
I really would like to give some work on this problem, but I have no idea how to do it! Please help! An airplane is dropping bales of hay to cattle stranded in a blizzard on the Great Plains. The pilot releases the bales at 120 m above the level ground when the plane is flying...
September 13, 2006

Physics
At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 2.50 m/s^2. At the same instant, a truck, traveling with a constant speed of 15.4 m/s, overtakes and passes the automobile. How far...
September 12, 2006

Physics
An athlete starts at point A and runs at a constant speed of 5.40 m/s around a round track 250 . in diameter. Find the x component of this runner's average velocity between points A and B. GOT THIS!!! 3.4 m/s Find the y component of this runner's average velocity ...
September 11, 2006

Physics
A 0.525 kg ball starts from rest and rolls down a hill with uniform acceleration, traveling 154 m during the second 10.0 s of its motion. How far did it roll during the first 4.00 of motion? I thought the answer was .2464 m, but it has been a couple of days, and I don't ...
September 11, 2006

Physics
A rock is thrown vertically upward with a speed of 11.0 m/s from the roof of a building that is 70.0 m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? GOT THIS!!!! t=5.07s What is the speed of the rock just before it ...
September 11, 2006

Science
Given seccant of thata = 3, use trigonometric identities to find the exact value of a- Cos thata b- tan squre of thata c csc (90 degree - thata) d- sin squre thata secTheta=3 but secTheta= 1/cosTheta solve for cosTheta Then, sin^2theta+ cos^2Theta=1 solve for sinTheta. then, ...
August 30, 2006

CellBiology
The number _____ and _____ sign are assigned to the first nucleotide of a transcriptional unit. a. 0, positive b. 1, negative c. 1, positive d. 0, no sign I would choose "d". Please check.
July 31, 2006

CellBiology
For membrane-associated proteins, the consensus sequence _______ is found on the inchoate (new) polypeptide and ______ to halt. a. pribnow, replication b. signal peptidase, transcription c. stop-transfer peptide, transcription d. stop-transfer sequence, translation e. stop-...
July 31, 2006

CellBiology
Enhancers and promoters are ______. In contrast, the heterodimer "TFIIA and TFIIB" are examples of __________. a. trans-acting elements, cis-acting factors b. cis-acting elements, trans-acting factors c. cis-activating factors, trans-acting elements d. trans-...
July 31, 2006

cellbio
Griffith's experiments along with Avery, MacLeod and McCarty helped to determine the transforming factors of Pneumococcus bacteria. Using heat-killed S-strain bacteria and one particular fraction of the cell lysates, they were able to demonstrate that _____ and not ______ ...
July 21, 2006

cell bio
The entire ATP apparatus is also called the ATP_______ I think it is Synthesis but not sure. ATP synthesis is a process. apparatus is a noun. you need a noun. ATP----------------? I can't seem to think of an appropriate word. Sometimes I seriously wopnder about the ...
July 20, 2006

Cell bio
The driving force of ATP synthesis at the location of the ATP synthesis complex is the _________________? I believe it is the matrix but am not sure and it is just a guess. please help. You are right, but I think they want mitochondria for an answer. If I was the teacher, I&#...
July 20, 2006

Bio
Insulin, antibodies, enzymes and progesterone are four of many molecules found in and around cells. Of these four__________ are/is not a protein. (Points: 4) a. antibodies b. insulin and antibodies c. antibodies and progesterone d. progesterone The reason you aren't ...
June 17, 2006

Biology
184 nucleotides are bonded in a linear array, forming a nucleic acid. How many molecules of water were formed as a result of this polymerization? (Points: 4) a. 183 b. 185 c. 92 d. 368 Hint: Nucleotides are linked together by dehydration synthesis to form polynucleotides. This...
June 17, 2006

Bio
One way to determine the concentration of protein in a solution is to perform a "protein assay". There are several assay kits on the market that one can use, but they all rely on the common paradigm that the aromatic amino acid residues of a protein combine with the ...
June 17, 2006

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