Questions Asked on
March 19, 2007

Chemistry
A 35g sample of Fe is dropped into 80g of water at 20 degrees Celsius. What is the final (equilibrium) temperature of the iron/water? This isn't really a chemistry problem. There will be no chemical reaction. It is a heat capacity (physics) problem. Use
asked by Michelle 
physics
A theoretical gasoline engine runs with 76 percent efficiency. It is calculated that it expels 3.25*10^4 J of heat. a. Find the heat absorbed in one cycle. b. Find the work output in one cycle. All this comes from the definition of efficiency.
asked by anonymous 
physics
If a bowl of salt water is left in the sun long enough for the water to evaporate a layer of salt crystals will be left in the bottom of the bowl. Salt crystals are more ordered than dissolved ions. How does the increase or decrease in entropy relate to
asked by anonymous 
Biology
do you know if there are any good websites on population distrubution patterns and relevant adaptations of organisms? You need to choose a population. A species of orchids? A species of animals (kangaroo, etc)? A type of bird? A disease vector ? Make a
asked by san 
general
Can you list me what are the animals of the black forest ???? please Thanx http://www.google.com/search?q=schwarzwald+animals&rls=com.microsoft:enus:IESearchBox&ie=UTF8&oe=UTF8&sourceid=ie7&rlz=1I7SUNA You will find many different animals named in the
asked by AMY 
chem
For a double replacement reaction to occur, is it that one of the products must be insoluble and form a solid? There has to be some mechanism to remove the products from the reaction so that the reaction does not proceed in the reverse direction. Product
asked by Amie 
global studies
because canada is such a long way from the equator,much of the country has a climate that is? http://www.google.com/search?q=canada+climate&rls=com.microsoft:enus:IESearchBox&ie=UTF8&oe=UTF8&sourceid=ie7&rlz=1I7SUNA I live in southern Ontario, the
asked by matt 
global studies
The rivers of Quebec Province are used to make? http://www.britannica.com/ebi/article207027 =)
asked by joe 
global studies
the four major kinds of plant life in the United states are:tundra,grassland,desert scrub, and? Thank you for using the Jiskha Homework Help Forum. What about forests and flowering plants? P.S. Although the following link may not answer your question, it
asked by nancy 
global studies
which is not a way that the canadian government attempts to cooperate with french canadians? This looks like a multiple choice question. If so, please post the choices and indicate your answer.
asked by jack 
Science
Granite is an intrusive, felsic rock, which may be produced by partial melting or fractional crystallization. Explain how these processes can produce felsix magmas from more mafic parent magmas. Since this is not my area of expertise, I searched Google
asked by Anthony 
IGCSE Biology
Okay i have an exam in a couple of weeks, and i don't know how birds reproduce. So i was wondering whether or not anyone knew the detailed steps for it/ how it happens. thanx for your help!!! :D Birds reproduce by sexual reproduction, with external eggs,
asked by Nani 
History
What was the Armistad controversy? And, what rold did it play in the abolition of slavery? I think you mean the Amistad controversy, right?
asked by Jeri 
math
The length of a rectangular playing field is 5ft. less than twice its width. If the perimeter of the playing field is 230ft, find the lenght and width of the field. 2W+2L= perimeter = 230 L=2W5 ============ Solve these simultaneous equations. Post your
asked by cheryl 
math
A bicyclist rode into the 5h. In returning, her speed was 5 mi/h faster and the trip took 4h. What was her speed each way? distance =rate*time The distance is the same. y = rate going z = rate returning Going: d = y*t = y*5 = 5y return: d = z*t = z*4 = 4z
asked by cheryl 
math
A bus leaves a station at 1 p.m, travling at an average rate of 44 mi/h. One hour later a second bus leaves the same station, travling east at a rate of 48 mi/h. At what time will the two buses be 274mi. apart? Set up two equations as I did in the two
asked by cheryl 
math
850 douglas fir and ponderosa pine trees in a section of forest bought by a logging company. The company paid an average of $300 for each Douglas fir and $225 for each ponderosa pine. If the company paid $217,500 for the trees, how many of each kind did
asked by cheryl 
math
2x(x2)=x+3 2x2=x+3 What error has been made in solving this equation, and what could be done to aviod this error? The 2x was NOT multiplied by the contents of the parenthsis. Should have been 2x2  4x
asked by cheryl 
math
400 people found that 66 were lefthanded. What percent of the 400 were lefthanded? percent= 66/400 * 100
asked by cheryl 
math
If the total bill at a restaurant, including a 15% tip, is $65.32, what was the cost of the meal alone? 1.15 X = $65.32 I am assuming that you can solve this equation for X (the cost of the meal alone). If you cannot, respond to this post with more
asked by cheryl 
math
Ted must have an average of 70 or more in his summer course to obtain a grade of C. His first three test grades were 75, 63,and 68. Write an inequality representing the score that Ted must get on the last test to get a C grade. Let X be the grade on the
asked by cheryl 
math
The cost of a longdistance telephone call is $.36 for the first minute and $.21 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding $3. cost= .36 + .21(m1) then put
asked by cheryl 
chem
when a gas is collected over water, is the gas pure? No. It has water vapor in it.
asked by david 
Math
An electronics firm uses 600 cases of transistors each year. The cost of storing one case for a year is 90 cents, and the ordering fee is $30 per shipment. How many cases should the firm order each time to keep total cost at a minimum, assuming the
asked by becky 
Finance/Math
1. Present Values. Compute the present value of a $100 cash flow for the following combinations of discount rates and times. a. r = 8 percent. t = 10 years b. r = 8 percent. t = 20 years c. r = 4 percent. t = 10 years d. r = 4 percent. t = 20 years 2.
asked by Ethan 
Math
Bond Yields. An AT&T bond has 10 years until maturity, a coupon rate of 8 percent, and sells for $1,100. a. What is the current yield on the bond? b. What is the yield to maturity?
asked by Xavier 
Finance
Bond Pricing: A 6year Circular File bond pays interest of $80 annually and sells for $950. What is its coupon rate, current yield, and yield to maturity? Bond Pricing : If the Circular File wants to issue a new 6yar bond at face value, what coupon rate
asked by Xavier 
macroeconomics
a) Suppose the economy is characterized by the following behavioral equations: C = c0 + c1YD YD = Y â€“ T I = b0 + b1Y Government spending is constant. Note that investment now increases with output. Chapter 5 will discuss the reasons for this relation.
asked by Eve 
chemistry
Write the compound formulas for each of the following pairs and the name of the compound formed when the elements or radicals combine. Mg+2 + OH1 K+1 + PO43 Cu+2 + S2 N+5 + O2 Compounds have zero charge. Therefore, for magnesium hydroxide, the first
asked by jessica 
Math
Hi how do we rearrange this into y=mx+b form? Ax+By=8 steps would be appreciated
asked by gorden 
math
what is an inequality? http://en.wikipedia.org/wiki/Inequality
asked by lizzy 
physics
The length of a bicycle pedal arm is 0.152 m, and a downward force of 146 N is applied to the pedal by the rider's foot. What is the magnitude of the torque about the pedal arm's pivot point when the arm makes the following angles with the vertical? (a)
asked by wolfpak 
PHYSICS
The acceleration of the centerofmass point of a system of particles depends on: a) all the forces acting on the system b) only the external forces acting on the system c) only the internal forces acting on the system
asked by terrence 
PHYSICS
The area under a forceversustime curve is: a) momentum b) impulse c) velocity what's the area under a forcevstime curve: momentum, impulse, or velocity?
asked by terrence 
PHYSICS
When the force F acting on a particle depends only on the particle's position coordinate x, and when the particle moves along the xaxis, then the work done by the force is the area under: a) F versus x curve b) F versus v curve (v is velocity) c) F versus
asked by terrence 
Chemistry
How many carbon dioxide molecules will form when a naptha molecule burns? Thanks Write the equation, then solve it just as we did the problem on water molecules yesterday. Post in detail any questions you have about what to do next.
asked by Jessica 
English
I Have an oral presentation to do on how past wars have affected our lifestyles today can you help? If you give us an outline of what you've thought about for your presentation, we'll be glad to add our comments. Depending upon how long the presentation
asked by Virginia 
Social Studies
What did Thomas Jefferson and Alexander Hamilton begin disagreeing about in ,like, 1889? Jefferson and Hamilton had been dead for many years by 1889. For information about their disagreements starting about 1789, check out these sites.
asked by Zilpha 
science
I am studying science at GCSE. I a working through a revision book and have come across a question which i am unsure of the answer. The question is, "state the number of different elements present in C6H5CO2Na." The answer i have is 14 but still i am
asked by sam 
computer
this isnt really a school question but i have a question about the sun java...it wouldnt load any of my games using it but whenever i deleted it and using the regular java...its working fine...it doesnt make any sense...please i hope someone can explain
asked by sheila 
science chem
Please could someone give me a link to a site that explains waht an alkali is? thanks I don't know of a site BUT I probably can find one if you really want it. However, an alkali is simply a base such as NaOH or KOH, or lye. If you still want me to look
asked by sam 
Economics
1.) How do producers use market research to help maximize profits? 2.) Give two examples of companies that are characterized by a monopolstic competition market structure.
asked by Chrissy 
Algebra
ARE THESE CORRECT? Over the yrs, the O'Connell Company has been switching from typewriters to computers. At once time the company had 815 typewriters which were wearing out at a rate of about 60 per year. At the same time, they had 500 computers and were
asked by River 
Science question needs answering
Please note that we don't do students' homework for them. Once YOU have come up with a response to YOUR questions, please repost and let us know what you think. Then someone here will be happy to critique your work. list the characteristics scientists use
asked by Writeacher 
Calculus
Which of the following series can be used to compute ln(.8)? a) ln(x1) expanded about x=0 b) lnx about x=0 c) ln x in powers of (x1) d) ln(x1) in powers of (x1) e) none of the proceding I am confused... please help!
asked by Joan 
Terry High School
5,3x7=2x+1 Please never put personal identifying data in your post, like the address, or full name, or the name of your high school. The world is a dangerous place. Please discuss this with your mom. I can tell what you mean by 5,3x What are you trying to
asked by Debbie 
Science
What is the function of the right brain and why is it important in optical illusions? Since this is not my area of expertise, I searched Google under the key words "right left brain illusions" to get these possible sources:
asked by Gina 
Punctuation
I need to be sure that I punctuated these sentences properly. Each group emphasizes on a particular punctuation mark. Punctuation within Sentencesâ€”Colon 1.
asked by Beth 
Finance
1. Present Values. Compute the present value of a $100 cash flow for the following combinations of discount rates and times. a. r = 8 percent. t = 10 years b. r = 8 percent. t = 20 years c. r = 4 percent. t = 10 years d. r = 4 percent. t = 20 years 2.
asked by Antoinette 
Finance
Bond Yields. An AT&T bond has 10 years until maturity, a coupon rate of 8 percent, and sells for $1,100. a. What is the current yield on the bond? b. What is the yield to maturity?
asked by Antoinette 
Finance
Bond Yields. An AT&T bond has 10 years until maturity, a coupon rate of 8 percent, and sells for $1,100. a. What is the current yield on the bond? b. What is the yield to maturity? I believe you are missing something; either the market rate of return or
asked by Antoinette 
volume stoichiometry
Determine the volume of oxygen that is needed at STP to completely react with 5.63 g of potassium. 4K + O2 yields 2H2O I don't buy the equation. If K is reacting with oxygen, then the equation is 4K + O2 ==> 2K2O Actually, I think it forms K2O2. Do you
asked by shelley 
Algebra  solving linear equations w/ substitution
The question in the book reads: "Suppose you try to solve a system of linear equations using substitution and get this result. How many solutions does each system have?" 1)x=2 2)y=12 3)6=x 4)8=8 5)7=y 6)5=3 I understand #3 and #6, but I do not
asked by Samantha 
chem help
a scuba diver breathing normal air descends 100m of depth, where the total pressure is 11 atm. What is the partial pressure of oxygen that the diver experiences at this depth? Can someone help out on this question? Make a ratio: 11atm/1atm= P/partial
asked by david 
Chem
Could someone explains reaction heat and Entropy and Free Entropy to me. And can you please give an example of each. Thanks Much! ;) Since this is not my area of expertise, I searched Google under the key words "heat entropy free" to get these possible
asked by Hello Kit 
science
forces that change the shape of the land wind? water?
asked by Anonymous 
algebra
How do I find out if x1 is a function  3 and does x1 1 1  =y =    =y 3 3x 3 oh sorry, it came all weird when i typed it out can you just answer me this? how do i find out if (x1)/3 is a function? oh, and sorry, the name's wrong because I used
asked by Lynda 
Math
The Bookholder Company manufactures two types of bookcases out of oal and walnut. Model 01 requires 5 board feet of oak and 2 board feet of walnut. Model 02 requires 4 board feet of oak and 3 board feet of walnut. A profit of $75 is made on each Model 01
asked by Marie 
math
How do you determine whether something is a function or not? If it is a rule or formula that lets you input one number to get another, then it is a function.
asked by George 
math
which is greater 98% or 9.8? well a percent is out of 100, so written as a decimal 98 percent would be 0.98 well then if 98% is 0.98 then what % would 9.8 be?
asked by Rebekka 
social studies: Maps
Does anyone know where on the internet to find a fairly good political map of Asia? I have already google searched and none of the results were good. Thanks for any help. This seems to be a pretty good site. There are many possibilities. I checked the 2000
asked by lilly 
math
so if 98% is 0.98 then what % would 9.8 be? please do not multiple post the same question,Thanks.
asked by Rebekka 
math
so if 0.98 = 98% then what % would 9.8 be? 980
asked by Rebekka 
Math (quick check plz)
hi i rearranged these terms into y=mx+b can you plz check and see if they're right? 1. 2x+5y16=0 2. 4x3y6=0 3. 3x+y+2=0 1. 5y=2x+16 2.3y=4x+6 3. y= 3x2 tnx ^^ On the first two, you need to divide each side by the coefficent of y. On two, what
asked by gorden 
Chemistry
I need to predict the acid/base reactions of sodium carbonate with HCl, CH3COOH, NH3, and NaOH. I'm stuck, when I'm writing out the ions to find the strongest acid and base, does the NaHCO3 become Na and HCO3, or N, H, and CO3? Also, would these be
asked by Lyn 
math
which # is greater? 98% or 9.8? see my other post.
asked by Rebekka 
math...help please!
so if 0.98 = 98% then what % would 9.8 be? 980 percent
asked by Rebekka 
math
what are some examples of a rate? speed of a car, how fast a cake bakes, how fast your sister grows, the speed of your grades going down if you start to not turn in homework.
asked by remae 
Math...
Describe a situation that could be modelled by each linear equation. a) p=6.75h b) p=25+6.75h please help. thanks. a) A basic rate of pay b) A rate of pay in which a person is paid an initial $25, plus $6.75 per hour after that.
asked by May 
Science
I need help finding the missing word heres what i wrote. But i'm not to sure this word goes with it. An adequate supply of fuelwood helps to prevent disease by allowing water to be boiled to ____________ it. [Protect???] sterilize
asked by Mack 
Social Studies
Why did the settlers name their community Seattle? http://www.chiefseattle.com/history/chiefseattle/chief.htm
asked by Will 
Social Studies
why is indianapolis know as the "Crossroads on America"? http://en.wikipedia.org/wiki/Crossroads_of_America
asked by Will 
Chemistry
Completion Stuck on number 7 & 11 on my homewowrk 7)An Equation must never be balanced by changing the _______ in the chemical formula of a substance. 11)If a _______ is used to increases the rate of a chemical reaction its formula is written above the
asked by Chris 
American Indian Studies
Which Plains tribes most resisted expansion? http://www.google.com/search?q=plains+tribes+expansion&rls=com.microsoft:enus:IESearchBox&ie=UTF8&oe=UTF8&sourceid=ie7&rlz=1I7SUNA There are several websites in this group of search results that should help.
asked by Plain tribes 
science
what are 4 differences between ionic and covalent bonding? plz help thanks!! http://antoine.frostburg.edu/chem/senese/101/compounds/faq/propertiesionicvscovalent.shtml i clicked on the link but it doesnt tell me anything See if it works (Broken Link
asked by hannah 
science
can two liquids possess the same degree of toxicity but present different degrees of hazard? Of course. One could be more volatile.
asked by Mary 
english
i need a quote from julius caesar and a good connection to something that's going on in the world, i am having trouble. please help me. http://quoteland.com/author.asp?AUTHOR_ID=119 There are many here from Shakespeare's plays, including several from
asked by kayla :] 
Science
I'm having trouble figuring out what the independent and dependent variables are in the following experiment: 1.
asked by Zack 
History
What do the 35 stars and their arrangement and the 13 strips mean on the 7th Cavalry Guidon Flag that Custer used in the battle of little big horn Thank you for using the Jiskha Homework Help Forum. On the first site you can see the flag:
asked by Suzy 
question
there are some practical applications for fractions in your daily life. What are the challenges you have experienced regarding the use of fractions? Explain your answers. Practical application: cooking and measuring ingredents, measuring time (half past,
asked by carmen 
math
In your opinion, how is the order operation used to solve equation. exponets, groups, multiplication, division, addition, subtraction. This allowes you to get the same result every time..... I hope this helps :) I searched Google under the key words "math
asked by cheryl 
Chem
Chloroform, CHCl3, was once used as an anesthetic. In spy movies it is the liquid put in handkerchiefs to render victims unconscious. Its vapor pressure is 197 mmHg at 23 degrees C and 448 mmHg at 45 degrees C. Estimate its a) heat of vaporization b)
asked by Chris 
alebratic propertys
Can someone help me solve these m1=(3x+20) m3=5x16 (Vertical Angles are Congruent) a.) _____ = (5x  16) (Substitution) b.) 2x + 20 = _____ (Subtraction Prop. of Equality) c.) 2x = _____ (Subtraction Prop. of Equality) d.) x = _____ (Division Prop. of
asked by mike 
Calculus!!!
I need your help... I've posted this question a while ago but no one has answered it yet. Please please help me. Which of the following series can be used to compute ln(.8)? a) ln(x1) expanded about x=0 b) lnx about x=0 c) ln x in powers of (x1) d)
asked by Joan 
Science
will someone please answer my question!!!!!!!!!!!! I need finding the missing word. here's what I wrote but i'm not to sure it's the right answer. China has implemented a campaign to reduce birth rates that includes _________ rewards for single child
asked by Mack 
Math
is this correct? 9(2)(7)=5 Mult 2x7 is 14 then 914=5? Thank you? Your answer is right :)
asked by Russell 
Education
Which Early Childhood setting follows closely to Montessori theory, Naeyc accredited, childcare, first grade, preschool or primary. and then i have to give an example thanks. NAEYC accredidation is for Birth through Kindergarten. So that rules out some of
asked by casey 
Algebra
Why are variables useful in algebra? I feel the use of variables make it difficult for many people to understand because it is subconcious that math is numbers, not letters.... Thank you! By using a variable, one may make use of a formula which is good for
asked by russell 
algebra
How do I tell if (x4)/3=y is a function? thanks It tells you wnat y is in terms of x. It is therefore a fucntion.
asked by Miles 
INFORMATION TECHNOLOGY
WHAT IS MASTERING SKILLS Mastering = becoming so good at something that one is a "master" of it. Becoming very proficient. http://www.answers.com/mastery http://www.answers.com/proficient =)
asked by Cassy 
English
Does anyone know any websites that have humorous devices such as, absurdity, caricature, high humor, etc (with examples)? Here are two places I like. http://www.cartoonbank.com/prints_currentissue.asp?mscssid=W9RR21STX5LT8NEGE0T2BGN2NWLGBTE2&sitetype=1
asked by Larry 
Biology
Hi there, Describe the role of bacteria in biotechnology and genetic engineering. I'd appreciate the help. Thanks. Since this is not my area of expertise, I searched Google under the key words "bacteria biotechnology" to get these possible sources:
asked by Martin 
Science
I need help please. I'm really clueless of what the answer is. The theory of demographic transition is based on the idea that industrial development causes ________ and ___________ progress that affect population growth rates. [I really have no clue what's
asked by Mack 
Financial Analysis
What is the payback period on each of the following projects?
asked by Vanessa Belunek 
Information Technology
what are the benefits from using thinking skills you succeed in your educational and personal life i guess!!! I would love to hear and critique what you think of for this answer ;) Matt What happens if you DON'T use thinking skills? That is, if all you do
asked by Cassy 
Chemistry 12
Hey yall! i am working on a lab where we used NaOH solid (pellets) and 1.0M of NaOH solution. i was wondering is Sodium Hydroxide a substance that reacts with the enviroment? because maybe that could be like a source of error right? so basically i am
asked by sandie 
Physics  drwls?
A 2000 kg truck traveling north at 38 km/hr turns east and accelerates to 55 km/hr. What is the change in the truck's kinetic energy? What is the magnitude of the change in the linear momentum of the truck? What is the direction of the change in linear
asked by winterWX 
biology
please help me unscrample the following words: (the space means thate the anagram has two words in it, but the space is not necessarily at the space) rmns teizysecntiore nt roetssieitrsic id ksdxlne so derrecisgntdie Thank you very much for your time!
asked by Lily 
Physics  drwls?
A small block of mass m = 4.0 kg can slide along the frictionless looptheloop. The block is released from rest at point P, at height h = 23R above the bottom of the loop (R is the radius of the loop). Express your answers in the form ngR, where n is the
asked by winterWX