Questions Asked on
January 18, 2007

random
what kind of website is this? what is jiskha? Jiskha is the name given to the site by the man who runs the show here. His name is Leo. This is a help site with the emphasis on help. We try to help students do their homework. But we like to see what the
asked by cc 
acids and alkalis
can you tell me me some acids and alkalis that are used in the house acids. vinegar(acetic acid), lemon juice (citric acid), cream of tartar (potassium hydrogen tartrate), vanish (sodium hydrogen sulfatebut I think the newer product has changed the
asked by abigal 
Chemistry
What is the chemical equation for the combustion reaction between methanol and air? CH4 + O2 ==> CO2 + H2O. All hydrocarbons produce CO2 and H2O when they are combusted in air. The above equation isn't balanced. I assume you can do that? If not, ask OR
asked by Raj 
chemistry calorimetry
how can i get the mass of a liquid when i'm given the heat enrgy that is added, and the specific heat of the liquid to which is added, plus the increase in temperature. q = mass x specific heat x (Tf  Ti) q is heat in Joules. mass in grams specific heat
asked by claudia 
Chemistry (check)
using the equation 2H²+O²>2H²O,______ of hydrogen will react with 6 mol of oxygen. Would "12 Mol" be rigt to fill in the blank? yes thanks!!
asked by Briana 
Statistics
Fortune magazine publishes an annual issue containing info on Fortune 500 companies. The following data show the six states with the largest number of Fortune 500 companies as well as the number of companies headquartered in those states. State # of
asked by Frank 
Psychology
Three different ways of attempting to integrate religious beliefs and scientific knowledge are (1) cafeteria approach, (2) fortress approach and (3) the integration approach. Which method is more commonly used in life to intergrate religious beliefs and
asked by sunshine 
trig
give exact value of cos 75 degrees. give exact value sin 15 degrees. give exact value sin 225 degrees. You will have to use the addition relations here. Notice 75 is 30 +45, 15 is 4530, and 225 is 180 + 45. I will be happy to critique your work.
asked by Matt 
Chemistry
ok.. im confused: Ammonia and oxygen react in the equation: 4NH³+5O²> 4NO+6H²O. When 2.4 mol of NH³ are present, the reaction yields ____ mol of O². i have no clue how ot do this! Look at your problem to make sure it is posted correctly. NH3 REACTS
asked by Briana 
More Chemistry (yeah im bad at math...)
In the Reaction CO+2H²>CH³OH, 1.27 g of CH³OH are made in the lab. The Percent yield of this reaction is___. Would the answer be 42? Pick a number, any number. You need to know how much CO OR H2 you started with. As it stands, the answer is
asked by Briana 
Chemistry
massmass conversions and massmole conversions: what is the difference and how do you do each? mass is converted to mols by mols = grams/molar mass. mass of one chemical is converted to mass of another chemical by using the coefficients in the balanced
asked by Briana 
Uuh Empirical formulae
Hi Can anyone help me define the empirical formula for highest fluoride and hydride in ununhexium. 292 uuh 116 How is this reached... Thanks freddo Uuh is in group 16 (or VIA depending upon the system being used) so its chemistry should be similar to O2,
asked by Freddo 
can someone please help me?
simplify the following expressions involving complex numbers. (3+2i)(7i) 10 + 3i how did you do that? can you show me this one and explain how this time? (3+2i)(7i) or even (32i)^2 you would do 3+2i=5i, then 7i=7i then 5i+7i=12i (3+2i)(7i) =
asked by Shay 
Math
Can you help me solve this problem...? A teacher said to a pupil: To the nearest per cent, 1/6 is 17% The pupil said: So, to the nearest per cent, 2/6 must be 34% Show that the pupil is wrong. *How do you work it out? it is 33% because: the percentage
asked by Claire 
science
a) calculate the heat of reaction, in kilojoules, for the reaction: 2NO2(g) + 3H2(g)>2NH3(g) + 2O2(g) b) is the reaction endothermic or exothermic? how can you tell? I will be happy to critique your work on this. You will have to look up the heats of
asked by michelle 
MATH
How do yoi solve 1+1=?????????? "WHAT?!!?" ummmmmmm don't u just put the 1's together... i think its 11. Thanks DUDE!!!! :') All this time I thought it was 2! :' ) HaHa! How dumb was I. Welp; that's what I get for thinking.... :')
asked by LOP 
Trigonometry
evaluate sin^1(negative square route of 3over2) in radians.
asked by Matt 
Trigonometry
the voltage E in volts in a circuit after t seconds (t70) is given by E=12 sin(120pi times t). After how many seconds does the voltage first reach 6 volts?
asked by Matt 
religion , help
what is the nature of god for confucianism and daoism? i've done hinduism and buddhism but these two confucianism and daoism i can't find them. Confucianism doesn't recognize a god. Many experts don't consider Confucianism as a religion. It's a philosophy
asked by kailin 
Trigonometry
simplify: 2sin35 deg times cos35 deg.
asked by Dom 
math (statistics
John's zscore on a college entrace exam is 1.3. If the raw scores have a mean of 480 and a standard deviation of 70 points, what is his raw score? Use a zscore formula to find John's raw score. The formula: z = (x  mean)/sd >sd = standard deviation
asked by Joe 
trig
if 10 students enter projects in the art show, how many different ways can they come in 1st, 2nd, and 3rd place? would you go 10^3 OR 10TIMES 3? This is not a trig question. Neither of those answers is correct. After making one of ten possible choices for
asked by Dom 
social
hi for my homework i have to identify the topics and summarize the viewpoints of "Wealth and its uses" by andrew carnegie..and idk what to write ne help would be appreciated thanks What did Carnegie believe about wealth? How did he think lots of money
asked by jon 
antiderivatives
i need the antiderivative of 2x/x^2 thanks. Two x over x squared? Reduce it to 2/x the integral of 1/x is ln x.
asked by andrew 
Chemistry (Check)
Classify each of these statements as always true, sometimes true or never true. __NT___11. The SI base unit of mass is the milliliter. __AT___12. A decigram is 100 times smaller than a gram. ___ST__13. The SI unit of volume is derived from the unit of
asked by Bryan 
math
what is a double factor? I am filling in a multipication table. I am sopposed to color the double factors red. i realy need help in multiplacation and division.
asked by alex 
Algebra
how do you solve this equation...its a polynomial...help please What is the equation
asked by Taylor 
help...solving a polynomial....algebra
solve this please....help me....12x(squared)+7x10 Do you wish to factor this trinomial? If so, the factors are: (4x + 5)(3x  2) You can use the FOIL method to check. If this is supposed to be an equation: 12x^2 + 7x  10 = 0 ...then set each factor equal
asked by Taylor 
factoring cubes
how to factor x^327 well since 27 is a perfect cube and so is x^3 wouldn't the answer be x3? no, its something like (2x3)(?x^2+?X+?) i don't know how to figure all the parts out. Here's the format for the difference between two cubes: (a  b)(a^2 + ba +
asked by Linds 
U.S. history
What were the successes and failures of the reconstruction of the Civil War? http://en.wikipedia.org/wiki/Reconstruction if you are talking about the period of reconstruction, some of the successes were three amendments passed the 13th 14th and 15th
asked by carmen s. 
chemistry
question: "If gas is $1.20 per gallon, how much would it cost to fill a 50liter tank?" using conversion factor. 1 L = 1.056 quarts. 4 quarts = 1 gallon. Convert 50 L to gallons and multiply by 1.20/gallon. Let me know if this is sufficient. I think I got
asked by cc 
religion, help
is there a website for daoism for children? This is the best I could find. http://www.eng.taoism.org.hk/daoistbeliefs/default.asp I Googled Daoism kids and Taoism kids and found these two sites.
asked by kailin 
philosophy
describe Christianity’s impact on philosophy. Include the following topics in your response:  the rise of Christianity in philosophy  key contributors to Christianity’s impact on philosophy  principle Christianized philosophical issues
asked by Dawn 
Spanish
Can someone please proofread my Spanish? Thank you. it will not let me post my HW because it says that I have posted a link but I haven't. Thank you for using the Jiskha Homework Help Forum. We'd be glad to proofread it if you can post it! Please try
asked by JYD 
chem.
if gas is $4.20 a liter, how much will it cost to fill a 14gallon tank? conversion factor: $4.20L 1.06qt 1gal ______x________x______ 1 1L 4qt i have no clue how to set it up. i'm confused. nevermind about the problem. good night. You want to convert 14
asked by cc 
calorimetry
please, someone answer my question i posted already I answered your question within 15 minutes. It is posted. Hit the refresh button of your computer. sorry that my question took youthat long, but it was of great help. glad to help. Thanks for using
asked by claudia 
Physics
When most people are asked what makes rockets lift off they say it's caused by the push of the exploding fuel against the ground. Explain why this is wrong. For every action, there is an equal and opposite reaction. That's from Newton, I think, but it may
asked by Raj 
Setting up a chem problem
Magnesium reacts with water in the equation, Mg+2H²O>Mg(OH)²+H². You have 8.1 g of magnesium available. This means you will need ___ g of water to use all the magnesium. This seems sorta simple, but how can i set it up? These are stoichiometry
asked by Briana 
Why can't I post
I don't know why, but i am getting a friend to post this up for me, but i cannot post a question, when i do, the successful window never comes up. it just goes back to the forum and doesnt add. can anyone help me why? or what i might need to do to get it
asked by becky 
International Business
Which of the following points of view do you agree with and why? 1. Although giving gifts shows respect in some cultures, bribery has no place in international business operatons. Businesses that condone it enjoy an unfair competitive advantage over those
asked by Carolyn 
vapor pressure
The total pressure in a flask containing air and ethanol at 25.7C is 878 mm Hg. The pressure of the air in the flask at 25.7C is 762 mm Hg. If the flask is immersed in a water bath at 450C, the total pressure is 980 mm Hg. The vapor pressure of ethanol at
asked by yayhawknelson 
heat of vapor pressure
When a student plotted ln [vapor pressure of a gas] vs. inverse Kelvin temperature, she obtained a straight line with a slope equal to 9500 K. According to the Clausius Clapeyron equation, Hvap is ? kJ/mol. The vapor pressure is proportional to exp
asked by yayhawknelson 
saving
Saving what? ?? whatwere the Classical views about saving.
asked by Writeacher 
music urgent!!!!!!!!!!!!
i need help with annotating a piece of idian bollywood music is there anyone who can help me? xXx uzi xXX hi hi back can can you help me with my music course work that is left before it is complete??? xXx uzi xXx
asked by uzma 
British & American Government Question
In comparing the British and American systems of government,which statement is true: A. Britain's government was created by a single document that is very similar to the U.S. Constitution. B. The House of Lords is the most powerful branch of Britain's
asked by David 
pH and Moisture
What is the relationship between pH and moisture? This is in context to woodland differences. Thank you. There is no relationship between moisture and pH, per se; however, moisture must be present in order to measure pH. Some research has been done, of
asked by Ste 
math
how do i solve two step equations? Do you mean two equations in two unknowns? The method of substitution is one way. There is a good tutorial here: http://www.themathpage.com/alg/simultaneousequations.htm
asked by megan 
French for Aubrey
Let's try "leçon 2:" PRESENT TENSE OF REGULAR ER VERBS: INTERROGATIVE
asked by SraJMcGin 
english
if there was a group of people sitting around a table and on that table something was about to fall off like a plate, would that reprsent to you that someone is reaching out for help, or would that mean living on the edge of danger. Thanks, I would go with
asked by cameron 
math check please
Approximately 4 out of every 10 students at Sonia's college live on campus. The college has 3,000 students. 1. How many of them live on campus? A 1,200 students 2. Write the proportion 21 is to 33 as 63 is to 99. A. 21/33 =63/99 3. is this fraction
asked by tony 
math
A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. I don't get how to calculate it. Please help.
asked by Shay 
Nitrogen Cycle
Could someone concisely and briefly summarize the nitrogen cycle? I'm all in a muddle. Please, I have to get this done by tonight. en.wikipedia. org/wiki/Nitrogen_cycle http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/N/NitrogenCycle.html
asked by Ste 
math
simplify the following expressions involving complex numbers. (3+2i)(7i) is i like x? and how would this work i know that you do this: (3+2i)(7+i) to get rid of the sign between the expressions. but then what?
asked by Shay 
Calc
y=ln(x+1) +ln(x1) find dy/dx I have trouble with this problem since i'm not that familar with finding the derivative when they involve ln. Please show me how to solve this problem. I should have gotten 2x/(x^21) The derivative of ln(x) is 1/x So, you
asked by Brian 
calc
Verify that the function satisfies the three hypotheses of Rolle's Therorem on the given interval. Then find all numbers c that satisfy the conclusiton of Rolle's Theorem. f(x)= x*sqrt(x+6) [6,0] f is continuous and differential f(6) =6*sqrt(6+6) =0
asked by Brian 
algebra
Divide (3x^3x^2+8x9) by (x1) Please help! I'll show you how this works out: 3x^2 + 2x + 10 x  1  3x^3  x^2 + 8x  9 3x^3  3x^2 2x^2 + 8x 2x^2  2x 10x  9 10x  10 1 Remember when you subtract, you change the signs. This did not divide evenly, so
asked by bailey 
Deutsch! Please Help Me.
Could you please proof read this short bit of text, which I wrote to learn for my oral exam because I don't wanna learn it wrong. Tankyoo Kannst du deine tägliche Routine beschriben? Um sieben Uhr stehe ich auf und dann wasche ich mich und bürste mir die
asked by Sarah 
History
To my knowledge the Arctic and Anarctic are the only places they haven't had major battles. What two continents have never been the site of a major military conflict? http://en.wikipedia.org/wiki/Continent Probably Antarctica and Australia. I'm just
asked by GuruBlue 
brain teaser
54=C. in a D. with the J's what
asked by Larnese 
science
what is produced when copper sulphate solution is mixed with ammonia solution? Either copper(II) hydroxide or copper(II) ammine sulfate or both depending upon the strength and the amount of ammonia added. The first is Cu(OH)2, the second is Cu(NH3)4SO4
asked by anon 
probability distribution
A coin is biased such that a head is thrice as likely to occur as a tail. Find the probability distribution of heads and also find the mean and variance of the distribution when it is tossed 4 times. P(head) + P(tail) = 1 P(head) = 3 P(tail) Solving gives:
asked by queen 
graph
How "Graphs" can play a role in the daily practice life in solving different kind of problem Graphs are visual representations of quantitative relationships. Viewing the relationships visually can make certain facts about these relationships more evident.
asked by queen 
math
simplify the following expressions involving complex numbers. (3+2i)(7i) is i like x? and how would this work i know that you do this: (3+2i)(7+i) to get rid of the sign between the expressions. but then what?
asked by Shay 
math
A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. I don't get how to calculate it. Please help.
asked by Shay 
math
what is the squar root of 256 16
asked by tia 
Math
Write several sentences to describe what the words angle, acute angle, and complementary angles have in common. I can't figure out what they have in common. Please Help! Thank You How about the word, "angle"? I hope this helps. Thanks for asking.
asked by chris 
Chemistry
Hydrogen boils at 20K. What is the boiling point of hydrogen on the Celsius scale? K is 273.15 degrees plus the celsius. so take 20(K) and minus 273.15 this would give your answer in celsius thanks.. One more question What is the volume of a board that
asked by Devon 
Physics
A luggage handler pulls a 20kg suitcase up a ramp inclined at 25 degrees above the horizontal by a force F of magnigutde 145N that acts parallel to the ramp. The coefficient of kinetic friction between the ramp and the incline is .30. If the suitcase
asked by Jamie 
Accounting
What represents the financial claim to business assets?
asked by Bryan 
math
how to add frecions ? Do you mean fractions? if so you have to add the numerators and keep the same denominator. For ex. 2 over 5 + 2 over 5 = 4 over 5 what are you talking about sorry
asked by is 
algabra
A cylinder has a radius of 5 in. If the volume of the cylinder is 250 pie inches cubed, What is the height of the cylinder? pi*r^2*h=250*pi pi cancels. solve for h r^2*h=250 h=250/r^2?? This is what I got originally. 250=pie(5)squared *h. 250= pie 25 h 10=
asked by peggy 
Algebra
I need help on this one too, please. Solve for X. 3x2y=6 I got x=6+2y/3. My question is this: Can this be reduced down to x=2+2y? You really need to use parentheses here. x = (6+2y)/3 or you might want to show it as 2+(2y/3) or 2+(2/3)y
asked by peggy 
math plz help!!!!!!
What do angles, acute angles, and complementary angles have in common??? they are all angles duh! my teacher said that that's too obvious Please check your book for the similarities. This site also has several explanations about the similarities. (Broken
asked by frank 
math
A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. set h=6 rearrange the quadratic equation to get
asked by Shay 
German. Please help :)
Could you proof read this? Kannst du deine tägliche Routine beschriben? Um sieben Uhr stehe ich auf und dann wasche ich mich und bürste mir die hare. Ich frühstücke und dannach fahre ich zur schule um viertel vor acht mit dem Bus. Ich komme um viertel
asked by Sarah 
Algebra :S
How would I work this out? 4x+3y=21 2x+y=8 x=___ y=___ 4x+3y=21 (1) 2x+y=8 (2) (1)  2*(2): y = 5 plugging this in one of the equations gives x = 3/2
asked by Sarah 
spanish
Quieres jugar basquetbol conmingo? bowwow is hot are you asking if someone wants to play basketball? yes can you answer it in spanish please ¿Jugaría totalmente el baloncesto con usted, si usted está en Calgary? ¿Yo no estoy seguro exactamente cuán
asked by chela 
World geography
identify the great lake on which chicago is located http://www.chicagotraveler.com/maps/chicagovenuescitymap.gif
asked by Summer 
Accounting 1
Completion 1)A Corporation's _________ spells out the rules under which the business is to operate. 2)A _________ is responsible for the affairs of the corporation.
asked by Bryan 
algebra
Determine the value(s) of k for which x^2+(k2)x2k=0 has equal and real roots. a x^2 + bx + c = 0 has two different roots if the discriminant D defined as: D = b^2  4 a c does not equal zero. If D = 0 then there is one root. That root is then real if b/a
asked by Shay 
MARKETING
I Tried looking these up on the dictionary for Jiskha it didn't help please help.. matching PLEASE HELP? 1. labor force. 2. open shop 3. yellow dog contract. 4. flextime. 5. job discriminiation 6.strike. 7. minimum wage. 8. righttowork law. 9. collective
asked by HW MKTING HELP 
algebra
A ball is thrown straight up. Its height, h(in metres), after t seconds is given by h=5t^2+10t+2. To the nearest tenth of a second, when is the ball 6m above the ground? Explain why there are two answers. you have to equate h to 6: h = 6 > 5t^2+10t+2
asked by Shay 
Math
UM how do you find the cercomefrince of a circle? pi*diameter
asked by John 
math
Can someone please help me with this, x/y = 2/9 I do not understand how to solve.... thanks x/y = 2/9 multiply by 9y 9y*(x/y)= 9y*(2/9) 9x = 2y can you take it from here? thank you
asked by catalina 
scince
excuse me? what are you trying to say?
asked by Shay 
algebra
y=2x^2+5x3 a)determine the xintercepts b)determine the vertex c)determine the axis of symmetry d)determine the maximum or minimum value, stating whether it is a maximum or a minimum e)determine the range can i get the equations so i can try them myself?
asked by Shay 
Algebra 1
3r5s=35 2r5s=30 multiply equation 2 by 1 then add the two equations. s will cancel and you can solve for r. Post your work if you need further assistance.
asked by Candice 
Chemistry
How can you solve for a derived unit involving density? I don't know what you mean. Density is a derived unit, no mater what the units used are. Do you have an example of what you are doing? Yes. What is the mass of a sample of material that has a volume
asked by Whitney 
Social Studies
I am doing a descriptive writting report on a famous place in Europe and I chose the Louvre Museum. I can't seem to find really any information can you help me? Thanks! Try a travel guide website like Frommer's or lonelyplanet
asked by Valerie 
Mr. LaRue's Taxonomy Project
Do you have sites for the following... Euglenopohyta #6 Zoomastigina #11 Chrysophyta #6 #6 List the names and give descriptions of the various classes/orders of the particular phylum/class #11 Discuss the importance of this phylum/class to mankind.
asked by Amanda 
Chemistry (Check)
Completion 1)Metric 2)Five 3)Meter 4) 5)Weight The International System of Units (SI) is a revision of the ___1____ system. There are __2____ SI base units. In SI, the base unit of length is the ___3____. The Space taken up by a cube that is 10cm on each
asked by Bryan 
xintercepts
0=2x^2+5x3 determine the xintercepts This is a quadratic equation. Use the quadratic equation, or... Factor it. (2x xxx)(x +xxxx)=0
asked by Shay 
math
John made a rectangular pen for his dog using 28 feet of fencing.If the width of the pen is 2 feet more than onehalf the length,what are the length and width of the pen?
asked by Ashley 
math
px+qy=r 2pxqy=2r find the solution. There are five unknowns here: p, q, r, x, y
asked by Ashley 
math/science
600kilometers= ____miles how many miles is 600 kilometers 1.6 km/1mile 600km* 1mile/1.6km =
asked by destiny 
precal
how in the world do you solve this... 4cos^2x 3 =0 add three to both sides, divide both sides by four, then, take the square root of both sides. f(x)=x'3+7x'2x7 find Zeros,solutions, answers, roots,and xintercept
asked by jackie nicole 
History
What is the significance of the Mayflower Compact, Virgina House of Burgesses, and colonial town meetings? How are these terms related? Please tell us what you think. We'll be glad to critique your answer. tell me everyone who fought in the french and
asked by Chris 
algebra
Divide (63i) by (2+i) I would muliply numerator and denominator by 2i. Then it becomes much easier.
asked by bailey 
trig
convert 80 degrees into radians 80 deg *2PI rad/360 deg = ?
asked by Matt 
Algebra
How do you solve for x in this problems?? bx2=10 x/2+e=9 5x+e=9 These are rather trivial. I will do one. The second: subtract e from both sides, then multiply both sides by 2.
asked by K 
algebra
determine the vertex for the function y=2x^2+5x3 for y = ax^2 + bx + c, the x value of the vertex is b/(2a) sub that x into your equation to find the y. Another way is to complete the square. so for yours, x = 5/4 etc. a third way, if you know Calculus,
asked by Shay 
Chemistry (Check)
Completion 1)Metric 2)Five 3)Meter 4) 5)Weight The International System of Units (SI) is a revision of the ___1____ system. There are __2____ SI base units. In SI, the base unit of length is the ___3____. The Space taken up by a cube that is 10cm on each
asked by Bryan 
Food Chain
Which diagram shows how energy flows through a food chain? A. Producer,carnivore,herbivore B. Sun,producers,herbivore,carnivore C. Sun,herbivore,carnivore,producers D. Carnivore,producers,herbivore I'm only in 5th grade, please make it easy to understand.
asked by Melthea 
Geomentry
Can you give me examples of finding centroids? http://www.google.com/search?hl=en&safe=off&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=finding+centroids&spell=1 nope EVIL !@#$%^&!!!!!!!!!
asked by Webbie 
state capitals
unscramble TILKRETOC Little Rock You left out a T this is how it is typed on sons homework paper. not sure if it is misprint or not. It's the only capital that comes close. Little Rock must be right.
asked by chrystal 
Calculus
find derivitive of 1/square root of x 1/square root of x = x^(1/2) The derivative is 1/2 x^(3/2) can you keep going on the problem to not have negative exponents? You can also use that the derivative of 1/f(x) is given by: f'(x)/[f(x)]^2 If you take
asked by Linds 
international business
Your organization is considering investion the philippines and you have been asked to give a presentation on this opportunity. In the presentation, you need to address the following: Investigate the economey of the philippiness and its neighbor, In what
asked by dre 
antiderivatives
i need the antiderivative of sinxcosx dx for intergral pie/2 to 0 thanks. sin(x)cos(x)dx = sin(x)d[sin(x)] = 1/2d[sin^2(x)]
asked by andrew