Questions Asked on
April 15, 2007

related rates with work shown
this is a relate rates problem in calculus in a right triangle, the hypotenuse is 5 and the vertical side is x and the angle is theta. so if theta increases at a constant rate of 3 radians per minute, at what rate is x increasing in units per minute when x
asked by Anonymous 
chem
a test tube containing CaCo3 is heated until all the compound decomposes. If the test tube plus calcium carbonate originally weighed 30.08 grams and the loss of mass during the experiment is 4.40 grams, what was the mass of the empty test tube? Write the
asked by laura 
Physics please check
Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final T initial) (2531J  1101J) =
asked by Mary 
stat
the average number of pushups a United States Marine does daily is 300, with a standard deviation of 50. A random sample of 36 marines is selected. What is the probability that the sample mean is at most 320 pushups? With a mean of 300, you are looking
asked by Anonymous 
physics  waves
Two sinusoidal waves, identical except for phase, travel in the same direction along a string producing a net wave y'(x, t) = (1.5 mm) sin(29x  4.0t + 0.960 rad), with x in meters and t in seconds. (a) What is the wavelength of the two waves? I found the
asked by COFFEE 
science
Does anybody know any real life example of a nucleus Are you speaking of nucleus as in the nucleus of an atom or the nucleus of a living organism? If the former, the nuclear atom bomb or H bomb or the decay of radioactive materials to bombard some cancer
asked by Amy L. 
Chem
Carbonyl fluoride, COF2, is an important intermediate for organic fluorine compounds. It can be prepared by the following reaction: CO2(g) + CF4(g) 2COF2(g) At 1000*C, K for this reaction is .50. What are the partial pressures of all the gases at
asked by JP 
Physics
A clown at a birthday party has brought along a helium cylinder, with which he intends to fill balloons. When full, each balloon contains 0.036 m3 of helium at an absolute pressure of 1.2 x 10^5 Pa. The cylinder contains helium at an absolute pressure of
asked by Mary 
physics
A pendulum consists of a uniform disk with radius r = 10 cm and mass 480 g attached to a uniform rod with length L = 500 mm and mass 175 g. (a) Calculate the rotational inertia of the pendulum about the pivot. (b) What is the distance between the pivot and
asked by john 
health [driving license]
what's the difference between a learner's permit, provisional license, and driver's license/ Thank you for using the Jiskha Homework Help Forum. Here is the site for the DMV (Department of Motor Vehicles: http://www.dmv.org/ Select your state and then
asked by anon.s 
Physics/ Chemistry please help
Hemoglobin has a molecular mass of 64 500 u. Find the mass (in kg) of one molecule of hemoglobin. Thanks for your help, but I figured this one out on my own.
asked by Mary 
bio
what is the advantage of stopping mitosis at metaphase when making a chromosome spread? it is advantageous to stop at metaphase to view the chromosomes for chromosomal analysis. (is this sufficient?)
asked by Blake 
CHEM
Calculate the molar solubility of gold(I) chloride (Ksp= 2.0 x 10^13) in .10 M NaCN. The complex ion formed is [Au(CN)2] with Kf= 2.0 x 10^38. Ignore any other competing equilibrium systems. I'm having trouble writing an equation to start off with.
asked by Kristina 
Physics
Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a negligible mass. The area of the piston is 3.06 102 m2, and the pressure outside the cylinder is 1.02 105 Pa.
asked by Mary 
Physics
Suppose a monatomic ideal gas is contained within a vertical cylinder that is fitted with a movable piston. The piston is frictionless and has a negligible mass. The area of the piston is 3.06 102 m2, and the pressure outside the cylinder is 1.02 105 Pa.
asked by Mary 
Health question
Is Lyme disease caused by a virus,parasite,or a fungus? Isn't it caused by a parasite? http://www.cdc.gov/ncidod/dvbid/lyme/ I know lyme disease is caused by a bacteria,but would that be a virus,or a parasite? Wouldn't it be a parasite?
asked by Dewey 
math plz
hi, is there an equation to finding the perpendicular bisector of a line. for example i had a line b (1,1) and c(8,1) and a was (6,5) how would i find the bisector from a going through line bc? tnx first off, the slope of a perpendicular line is 1/m
asked by gordain 
Chemistry
I want to know the enthalpy change for this reaction which occurs in a blast furnace: Fe2O3(s) + 3C(s) > 2Fe(l) + 3CO(g) You will need the heat of formation for CO, and ironIIIoxide, and the heatofmelting for iron. I suspect you have some temperature in
asked by Alice 
Physics please check repost
Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final T initial) (2531J  1101J) =
asked by Mary 
Science
What kind of problems does Rwanda have with its water supply? Please check these sites. http://www.engr.wisc.edu/cee/newsletter/2005_fallwinter/article03_ewb_program.html
asked by Rindi 
AP CHEM check work?
How many moles of ATP must be converted to ADP by the reaction ATP(aq) + H2O > ADP(aq) + HPO42(aq) + 2H+(aq) deltaG*= 31 kJ to bring about a nonspontaneous biochemical reaction in which deltaG*= +372 kJ? I did my work out like this..: 372 kJ x 1
asked by janelle 
Chemistry
What is the relationship between the equilibrium and changes of state? You need to be a little more specific. For liquids, for example, in a closed system, the vapor pressure of the liquid reaches equilibrium between the vapor and the liquid.
asked by N/A 
Physics please check
Three moles of an ideal monatomic gas are at a temperature of 345 K. Then, 2531 J of heat are added to the gas, and 1101 J of work are done on it. What is the final temperature of the gas? delta U= 3/2nR(T final T initial) (2531J  1101J) =
asked by Mary 
math
how do u mutiply decimals and how do u make a decimal into a fraction do you mean longhand?? write down the numbers the way you would whole numbers, skipping the decimal perform the multiplication as if you had no decimals count up the total number of
asked by leelee 
Biology
The main function of the circulatory system is absorption? True or false Since this is not my area of expertise, I searched Google under the key words "circulatory system function absorption" to get these possible sources:
asked by Antoinette 
Maths
There are x people in the bus. When the bus stops y people get off and 6 people get on. How many people are yhere now on the bus ? x = 6 y Is my answer right ? There are x people in the bus. When the bus stops y people get off and 6 people get on. How
asked by Fahad 
math,help
how do you change the following decimal into a fraction. 3.6666666 3 2/3 or 11/3 Memorize .666666 repeating as 2/3 Now if the sixes do not repeat forever, the fraction can be found as 36666666/1000000 which probably can be reduced some... thats right
asked by jasmine20 
equibrium  help!
Consider the reaction CO(g) + H2O(g) CO2(g) + H2(g) Use the appropriate tables to calculate a) deltaG*f at 552*C b) K at 552*C I'm pretty sure I have a good idea of how to do this: I believe I can use GibbsHelmholtz equation to account for the
asked by Daniel 
business and society
As a business owner, information can be one of your key assets. why must you,as a business owner manage information as a resource? How might the internet and related communication technology change your business? What are some of the ways that information
asked by Joyce 
Biologysquid anatomy
Why do squids need to have three separate hearts? Since this is not my area of expertise, I searched Google under the key words "Squid anatomy hearts" to get these possible sources: http://www.thewildones.org/Curric/squid.html
asked by Morgan 
math,correction
is this correct Find the constant term that should be added to make the following expression a perfect square trinomial x^2 + 7x My answer that i got was 12.25 Take half of seven, square it. 7/2 squared is 49/4. You are right. should i leave it as a
asked by jasmine20 
Chemistry
If barium nitrate solution is added to sodium hydroxide solution does a precipitate form? Are there exceptions? I have an assignment Q that asks about the precipitate, and I thought that Ba(OH)2 was soluble. Barium hydroxide is moderately soluble, up to
asked by Fiona 
Health
My text book says Lyme Disease is a bacterial illness. So,is Lyme disease caused by a virus or a parasite? I'm thinking its caused by a parasite. Right. The ticks that carry the bacteria are parasites. http://arthritis.webmd.com/tc/LymeDiseaseCause
asked by DaVonna 
Chem (monomers)
Hi I'm having major problems with monomers in proteins. One what is a monomer Two what is it doing in a protien? Much thanks, Rosie A "monomer" is a single unit of a polymer and a polymer is just a bunch of monomers (single units) hooked together. Teflon
asked by Rosie 
MATHS
Hi Just checking The area of one face of a cube is 64cm squared What it the total surface area of the cube? DO we do 64 times 6 and the answer is 384 cm cubed? Also it askes what is the volume I do 64 cubed which is 262144 cm cubed ? AM I right ? yes the
asked by gt 
muisic
I need help finding info on a grade 5 music around the world project. looking for info about italian culture music musical instruments,and italian celebrations PLEASE HELP These sites will help you learn about Italian culture, music, and celebrations.
asked by jennifer 
math,help
The height h in feet of an object after "t" seconds is given by the function h = 16t^2+70t+8 How long will it take the object to hit the ground? round answer to nearest thousandth this is what i have 16t^2+70t+8=0 x = (70 +/ sqrt (4388))/(32) from
asked by jasmine20 
maths
simultaneous equations x + 2y = 4 3x  4y = 7 x=3 and y = 1/2 i need to explain how i got this answer and do not know how to do that? i am confused about how you got this answer what working out is it the object in "elimination" is to get the coefficients
asked by Vicki 
business
What are the age requirements for a person to be competent? I've known 12years who are more competent in some things than many adults. People who are 16 are allowed to drive; 18yearolds can vote; 21yearolds have full legal status. A Time magazine
asked by Anonymous 
math
i don't get 2 use the rate 380 miles in 5 hours 2 find the unknown number for each equivelent rate round to the nearset tenth I don't get your question. What "equivalent rates" are you talking about? 380 miles in 5 hours is an average speed of 76 miles per
asked by fre 
English
Could someone please explain to me the rhyming scheme of a Petrarchan poem? http://www.answers.com/topic/petrarchansonnet Let us know if you still have questions. =) Here's an excellent explanation of how one figures a rhyme scheme:
asked by Sora 
math
how do i change 3.75 into a fraction simple or improper fraction? you could say 3 and 3/4 (since .75 = 3/4) or you could go from there and convert to improper. basically simplify 375/100 (multiply 3.75/1.00 by 100/100) but it can't be 3 and 3/4 your answer
asked by jasmine20 
math,help plz
i am lost with this one. Solve the system by graphing. what is the soltion. 2x2y=10 x+y=3 x=4 This is how the problem is with all thre equations. Help me please..... put it in slope intercept form. put both lines in slope intercept form. 2x2y=10 x+y=3 y=
asked by jasmine20 
health
where can i find information on teen driving laws in the metropolitan area [maryland, virginia, district of columbia], and i'm not allowed to use google? Arrrrggggghhhhh. You will have to see at your school if the Drivers Ed teacher has Va, Md, and DC
asked by anon.s 
math,help
how do i find the following: is there a formula for this? Problem #15 Find the constant term that should be added to make the following expression a perfect square trinomial. x^2+7x square a few binomials and see if you can see a pattern e.g. (x+3)^2 = x^2
asked by jasmine20 
Science
What kind of problems does Rwanda have with its water supply? any chance I could get someone to respond? Since this is not my area of expertise, I searched Google under the key words "Rwanda water supply problem" to get these possible sources:
asked by Rindi 
Music, Form.
AB form and verse/refrain form are the same, aren't they? Thank you for using the Jiskha Homework Help Forum. Since you are obviously studying music, you may appreciate the following website with a glossary of musical terminology. The AB form is at the
asked by Amy 
math,help
okay i am getting confuse with the decimals and fractions in order to make a table for the following problem.can someone help me make the tables the problem reads as follows. solve the system. 5x3y=13 4x3y=11 Now, i know i have to break them to the form
asked by jasmine20 
literacy
What is the success criteria for the following genres,  A newspaper report  A balanced argument  A biased argument  An explanation Thank you for using the Jiskha Homework Help Forum. This is indeed an interesting question. The rubric could depend upon
asked by laura 
Health
Is giardiasis transmitted through direct and indirect contact with infected fecal material or by touching the moist lining of the eyes and nose? Isn't it transmitted through direct and indirect contact with infected fecal matter?
asked by Sylvia 
health [slogan]
i need a slogan for teen driving laws for a health project. any ideas? The life you save may be your own! anything else? Be a smart driver and not a smart aleck corpse. Other teachers may have additional ideas. Please keep checking. i was thinking: Strive
asked by anon.s 
Business, Linear Programming
This post may be a little lengthy, so please bare with me if you can help. The problem is: A cruise liner has 4 classes of accommodations. Following are the # of reservations made, # of reservations available, and cost per room for each class: Super
asked by Matt 
Elem. Ed.
Can someone please give me input on this question? Complete immunization is usually required of chldren: 1.who will be turning 2 years old. 2.before they can travel across state line. 3.at the time they enroll in childcare programs. This question is
asked by Keisha 
math
Can someone help me with the equation and I will doing the answer During the past few years Great Britian's pund has been worth between $1 and $2 in US currency. Suppose the rate of exchange is $1.50 for each pund. a. What is the value in dollars for 5
asked by Taylour 
maths
for this quadratic equation: y24y16 = 0 which two options are correct solutions, rounded to three decimal places? 1) 4.483 2) 3.243 3)2.472 4) 1.472 5) 0.536 6) 5.243 7) 6.472 8) 12.443 Use the quadratic equation, we will be happy to critique your
asked by angel 
Chemistry
Ok i'm supposed to google these values for my teacher, but i can't get the answer im looking for...if you have them can you give them to me? Latice Energy for: Ammonium Nitrate and Calcium Chloride Hydration Energy for: Ammonium ion, Calcium Ion and
asked by Amanda 
math,correction
i am really trying is this correct. solve: 5(x2)^2 = 3 MY ANSWER THAT I GOT IS: X = 2 + (SQRT (3) )/(5) no. 5(x2)^2 = 3 (x2)^2 = 3/5 x2 = + sqrt (3/5) x= 2 + sqrt (3/5) so the whole fraction of 3/5 is inside the sqrt yes
asked by jasmine20 
math,correction
Is this correct: Problem #13 Solve: 9x^2 = 14 I did the following i divided 9 by both sides then i get this: x^2 = 1.5555555 then i squared both sides and i got the following answer: x = 1.24 I would not have used decimals x^2 = 14/9 x= +/ (√14)/3 Yes,
asked by jasmine20 
math,help
i am stuck with this problem: Problem #12 Solve by using the quadratic formula. 5x^2 + 5x = 3 i am at this step x = (5 (+/) sqrt (85))/(10) you are done!
asked by jasmine20 
Disease Question
Can you help with this question? Giardiasis is a communicable illness that is transmitted: 1. through direct and indirect contact with infected fecal matter or 2. by touching the moist lining of the eyes and nose. I want to say the correct answer is (A)
asked by Tottally confusedplease help!! 
i need help,math
okay i am completely lost after reviewing everything my mind is blank cans some one help me with the steps. Solve by completing the square x^2=5x+2 1st: You need to bring the 5x+2 to the other side so you have x^25x2 2nd: Find the values to where when
asked by jasmine20 
English
Has anyone read the book Girl in Hyacinth Blue by Susan Vreeland? If you have I need to draw a picture for each chapter to represent that chapter. Help? I haven't read this book, but drawing a picture for each chapter shouldn't be that difficult if you've
asked by Rachelle 
US History
Should the 1920's be remembered as a time of anxiety & intolerance, hedinism & liberation or both? http://en.wikipedia.org/wiki/1920s =)
asked by Shaina 
math
can anyone help please, i need a simple formula for working out taxes.if i had any number i need to know what the base was before 16% tax was added. i know the formula if the tax was 17.5%,what ever the total is if you divide that by 47 then x that by 7
asked by simon 
test,math
so then for 4.33333 would be in a fraction 13/3 IF the 333's are repeating. Yes.
asked by jasmine20 
science
what are the 12 examples of liquid items pf matter? gasoline, mineral oil, water, mercury, liquid sodium in a nuclear reactor...and so on.
asked by shreeya 
science
In what brand of shampoo does a marble move the slowest? It would be in the shampoo that has the greatest density. Since this is not my area of expertise, I searched Google under the key words "shampoo density brand" to get this possible source:
asked by Desi 
biology
what is the advantage of stopping mitosis at metaphase when making a chromosome spread?
asked by Blake 
vocab
can scuttle have any prefixes or suffixes or can it be changed into a noun, adjective, or adverb? What are some antonyms of it? Please help i am so confused Thank you for using the Jiskha Homework Help Forum again. Don't be too impatient! The volunteer
asked by anonymous 
Rutgers
Marketing management Customer satisfation and customer value. How are those related? For this and the several other questions you've posted, please tell us your answers and we'll be glad to critique them for you.
asked by carmen del grey 
Social Studies
I have to do a project and I can't get motivated to start!! I want a good grade, but I don't know how to convince myself to get started!! PLEASE HELP!!!!!!! Sometimes motivation just doesn't come. You can't wait until you feel like doing it. I urge you to
asked by Kelly 
pH really hard one
What is the pH of the solution created by combining 1.00 mL of the 0.10 M NaOH(aq) with 8.00 mL of the 0.10 M HCl(aq)? with 8.00 mL of the 0.10 M HC2H3O2(aq)? NaOH + HCl ==> NaCl + H2O So all the NaOH is neutralized leaving NaCl, which will not affect the
asked by Christine 
maths
for this quadratic equation: y24y16 = 0 which two options are correct solutions, rounded to three decimal places? 1) 4.483 2) 3.243 3)2.472 4) 1.472 5) 0.536 6) 5.243 7) 6.472 8) 12.443 You have to use the quadratic equation, we will be happy to
asked by angel 
Biology
Can you tell me specifically about the !@#$%^&tions of all of the squid's body parts and organs?
asked by Morgan 
Rutgers
Marketing management Customer satisfation and customer value. How are those related? Since this is not my area of expertise, I searched Google under the key words "customer satisfaction value" to get these possible sources:
asked by carmen del grey 
math,correction please
Problem #1 Solve by completing the square 2x^24x11=0 My answer: x = (2+/sqrt 26)/(2) Problem #2 Solve by using the quadratic formula x^24x60=0 My answer: x = (2+/sqrt 16)/(2) You did not do it completeing the square. Please show work. ON the second
asked by jasmine20 
math,help
this is what i have left but i don't know how to finish it. THe length of a rectangle is 1cm more than 4 times its width. if the area of the rectangle is 74cm^2, find the dimensions of the rectangle to the nearest thousandsth. so then: a =Lw A = 74 W= W
asked by jasmine20 
math
Can someone help me with how to write the equatin for these 2 questions. I will figure out the answer. During the past few years Great Britain’s pound has been worth between $1 and
asked by Taylour 
math
During the past few years Great Britian's pund has been worth between $1 and $2 in US currency. Suppose the rate of exchange is $1.50 for each pund. a. What is the value in dollars for 5 punds? b. WHat is the value in pounds for $25.50? 5pounds *(1.5
asked by Taylour 
BiologysquidHELP!
What is the buccal mass, and why is the beak inside of it? Buccal mass  Muscular bulb at the beginning of the digestive system that contains the mouth, beaks, radula and various glands.
asked by Morgan 
crime
indictment and information are 2 ways in which the accused can be informed of a charge.What is a third way? is it presentment?
asked by ben 
English
IN O'connors A good man is hard to find, for the question which person seems excited about having an accident? is the answer Bailey. Thanks These sites may be of help to you. http://www.exampleessays.com/essay_search/A_Good_Man_is_Hard_to_Find.html
asked by casey 
Research Paper
WHat do I do if I have a a source but I don't have the authors name and I have to put it in the paper...?understand.? Many internet sources don't list the author. You can use the URL and title of the site. oh ok thank you...so for example: blah blah
asked by margie 
health >.<
how would you descibe/define teen driving laws Please tell us how you describe/define them and we'll be glad to critique your answer. but i don't know how to ok, here's what i got: Teenage driving laws are rules that have been made to reduce accidents and
asked by anon.s 
vocab
can scuttle have any prefixes or suffixes or can it be changed into a noun, adjective, or adverb? What are some antonyms of it? Please help i am so confused Thank you for using the Jiskha Homework Help Forum. The definition of the word "scuttle" will
asked by anonymous 
Rutgers
Marketing Management How do you decide which brand strategy do you take?
asked by carmen del grey 
Rutgers
Marketing management the method will use multiple channels of distribution why and why not.
asked by carmen del grey 
math correction
Find the xintercepts y= x^22x15 answer: x = 2 +/ sqrt 8 I don't get that. Recheck.
asked by jasmine20 
AP BIO
Could you give me any information on fruit flies. We did a huge lab on the genetic ratio of wildtype fruit flies to mutant apterous (wingless) flies. Im doing a paper on it and i cant find enough information I don't know what information you have already
asked by Georgia 
literature
Does anyone know where I can find the last chapter in A Clockwork Orange? Perhaps online? Thanks! Since that book is not out of copywright, you will not find it on line. But this site has a good synopsis of the chapters.
asked by George 
chem
is it true that ethanol on skin feels cold due to the evaporation of the alcohol yes. But any solvent with a decent vapor pressure will do the same thing. Even water but you may need to wave your hands in the air to help it a little. That's why humans
asked by Anonymous 
Math ,help
how can i simplify this more its for the following problem: Problem #22 solve by using the quadratic formual. 5x^24x+1=0 this is where i am but i do not know how to go further. x = (4 (+/) sqrt (4))/(10) Problem #23 Solve by completing the square.
asked by jasmine20 
Rutgers
Marketing Mangement How do you determine promotional mix
asked by carmen del grey 
math,help
i need help with this one i've tried it many ways and still can't figure it out because it has the lines going between two solid lines. find the xintercepts. y = x^2 +5x+2 x intercepts is when y is zero. 0=x^2 +5x+2 using formula 5/2 + 1/2 sqrt (258)
asked by jasmine20 
algebra
how would ou write an equation or inequality that could be used for analysis, prediction example gas prices? can some one explain to me how to write this
asked by carla 
Please helpbehavior
Braking your car after you observe a child's ball rolling into the street from between parked vehicles is instinctive requires a conscious decision is a reflex is instinctice and requires a conscious decision. (my choice) am I right here? The braking
asked by Melissa 
math,correction
Is this correct: Solve: (x+5)^2 = 3 I get: x = 5 (+/) sqrt (3) Problem #2 Solve: 5(x2)^2 = 3 I get: x = 3 (+/) ((sqrt(3))/(5) No on the second. YOu have take the sqrt5 slso, so x= 2+ sqrt(3/5) correct on the first.
asked by jasmine20 
French
Is this paragraph correct? Would someone mind editing it for me? La derniere semaine, une partengue a piqué Steve Irwin quand il a nagé à la nord de l'Australie. Steve Irwin est mort de la poison. Il n'y a pas d'un accident. La partengue a été formé
asked by Chris 
Rutgers
class marketing management Why incentive compensation is important for sales people? How about commissions?
asked by carmen del grey 
english
english which or both are correct: 1. Is their any books by Sam Jones? 2. Are their any books by Sam Jones? ** can is be sigular or plura ( books vs book) Thank you for using the Jiskha Homework Help Forum. The singular = Is there any book by Sam Jones?
asked by claire 
Rutgers
Marketing Mangement Why incentive compensation is important for people? Why is important? In the basic psychology of incentives, the rewards are based on your level of performance. The better your performance, the greater the rewards you will receive. In
asked by carmen del grey 
math
i don't understand how i can find the values for n and m int he rate law experimentally
asked by Anonymous 
pH from saturday
i posted this question previously and got help however im still having some confusion. can u clarify ? what's the pH of the acid HC2H3O2 with concentration of .15? Bob Pursley worked that problem for you and gave it as [x^2/0.15] = Ka. What is it you don't
asked by Christine 
MATH,correction
IS THIS CORRECT NOW. solve by using the quadratic formula. x^2 = 55 My answer: x = (5 + SQRT (5))/(2) I don't see any x term, so b is zero. sorry it suppost to read that first 5x5
asked by jasmine20