Questions Asked on
February 8, 2007

Chemisry
what mass of protons would be required to just neutralize the charge of 1.0g of electrons? how do I answer this? You know the mass of an electron. Calculate how many are in 1 gram. You will need the same number of protons. Knowing the mass of a proton
asked by Chris 
s.s
before there was mills what was used to make thread? Before there were mills and factories, people made thread at home on spinning wheels. Check this site for more information and a picture of a spinning wheel. http://en.wikipedia.org/wiki/Spinning_wheel
asked by Melsissa 
physics
A 35kg skier skis directly down a frictionless slope angled at 11° to the horizontal. Assume the skier moves in the negative direction of an x axis along the slope. A wind force with component Fx acts on the skier. What is Fx (in N) if the magnitude of
asked by **chocolatekisses 
physics
a) In raising a 4800 N piano with a pulley system, the workers note that for every 2 m of rope pulled down, the piano rises 0.3 m. Ideally, how much force is required to lift the piano? (b) If the workers actually pull with 2500 N of force to lift the
asked by janice 
Chemistry
write isotpoic symbols of the form XA (for example, C13) for each of the following isotopes. **Do I add the number of protons and neutrons together to get the answer? The symbol is easy to figure out.** a) the iodine isotope with 74 neutrons B) the
asked by Melinda 
egypt mummification
What subtance was used to stuff the nostrils of a mummy? Thank you for using the Jiskha Homework Help Forum. Here are some sites for you: http://www.si.edu/resource/faq/nmnh/mummies.htm (from the Smithsonian) http://www.mummytombs.com/egypt/insides.htm
asked by Anonymous 
physics
In which of the situations listed below is energy being transferred as heat to the system in order for the system to do work? In which situation is work being done on the system in order for energy to be transferred from the system as heat? a. Two sticks
asked by anonymous 
physics
A mixture of gasoline vapor and air is placed in an engine cylinder. The piston has an area of 7.4*10^3 m^2 and is displaced inward by 7.2*10^2 m. If 9.5*10^5 Pa of pressure is placed on the piston, how much work is done during this process? Is work
asked by anonymous 
science
When a H II region is observed, it signals what stage in stellar formation? A the initial collapse of the interstellar cloud B the formation of planetary nebulae C the prostar stage D the zero age main sequence stage E depending on their masses the stars
asked by bolometric 
key signature
I am a singer who sings by ear. I've had some training, but not much in the way of theory. My question to you is, how do I tell what key I sing a song in. I am about to join a jazz trio and will have to know this. I do have a piano at home that I play by
asked by Songbird 
physics
A man is sitting in a bosun's chair that dangles from a massless, frictionless pulley and back down to the mans's hand. The combined mass of man and chair is 100 kg. With what force magnitude (N) must the man pull on the rope if he is to rise with a
asked by **chocolatekisses 
Social Studies
What is Nunavut's nickname and motto? Scroll down to the weather section of this site for Nunavut's nickname. (Broken Link Removed) This site has its motto. http://homeschooling.about.com/library/blcanumotto.htm
asked by Joel 
physics
Three boxes are connected by cords, one of which (mA) wraps over a pulley having negligible friction on its axle and negligible mass and two boxes (mB & mC) are hanging. The masses are mA = 22.0 kg, mB = 40.0 kg, mC = 16.0 kg. When the assembly is
asked by **chocolatekisses 
englishlord of the flies
Why is Piggy's fall emphasized? This site should help with that question. http://www.sparknotes.com/lit/flies/
asked by ktjo 
chemistry check
please check Write the balanced equation, with the enthalpy component, for the rusting process, given that Hf for iron and oxygen is 0 and Hf for ferric oxide is 826 kJ/mol. 4 Fe (s) + 3 O2 (g) > 2 Fe2O3 (s) You need to add the heat one of three
asked by key 
Hm. Essay Writing?
Okay, I am in Essay writing and I need to write a conclusionary paragraph on firewood, I need to first write a thesis statement with it using oak, willow and fir I must end with a recommendation about their relative efficiency as a heat source. x_x A.k.a
asked by Melolove on neo 
AP Chem
I missed a lab in class a week ago and had to make it up just the other day. My teacher didn't have time to explain the lab to me, so he gave me a brief overview of the procedure. The objective of the lab was to calculate the specific heat of an unknown
asked by Jess 
calculus II
We're doing areas by integrals now, with 2 eqns. I have a few questions. 1. Sketch the region in the xyplane defined by the inequalities x2(y^2)> 0 and 1xabs(y)>0. and find its area. Would it be best to solve for x, then graph it as x= something? Then
asked by Shelley 
Social studies
where do all human comes from? from the mother stomach Most scientists believe that humans originated in Africa.
asked by Kwame 
math
who created math God. Math is a symbolic language used to express ideas in the form of sentences and statements that attempt to make somewhat precise decisions about nature.
asked by jose 
English, punctuation
Could you help me fine 2 more punctuation mistakes in this article? Presidential first ladies have been an active force in American politics for nearly 300 years. These women's roles have been many, and varied. In 1800, Abigail Adams, dubbed "Mrs.
asked by marco 
math
Subjects Art Business Computers English Foreign Languages Health Home Economics Mathematics Music Physical Education Science Social Studies Features Contribute Experts Forum Job Openings Homework Tips Libraries.Jiskha Link to Us Reference Parents &
asked by Stine 
Math
I need help with this specific proof: Given: CE bisects Angle ABD FB and CE are strraight line segments Prove:angle x = Angle a
asked by Leah 
Chemistry
Plutonium239 is used in nuclear bombs. Determine the number of protons and neutrons in plutonium239. I really don't understand this. Can someone tell me how to do this? thanks What is the atomic number of Pu? Look it up on the periodic table...that is
asked by Benny 
Quadratic Equations
Ok, I am supposed to find out what the variables are by factoring and finding square roots. I couldn't find the right factors of a and c that added up to b in the equation (did that make sense?). Please help me find them! TYVM 5n+6n^24=0 I know
asked by Emily 
math help
could some please check to see if i got the right answers if not i will try again 1. Find the rate 392 feet/8 seconds A: 49 ft/s 2. Carlos works 8.25h and receives $102.30 pay What will he receive at the same rate if he worked 14 hrs? A: $173.60 3. A
asked by tina 
To Melinda
Look at the last response to your U?? question. I wonder?? That is what my book said...so I really don't know.
asked by DrBob222 
Economics
Derieve the demand for bonds. Md=$Y(.35i) Person's wealth is $50,000 Yearly Income is $60,000 I really have to idea on how to derieve the demand. Should I just put in the income($60,000) at $Y and solve the equation? Daang, I thought my math was hard. I
asked by Bill 
chemistry
I would like my equation checked, sodium cyanide and water.I have worked the balanced equation as: NaCN+H20=NaOH+HCN. If you want the molecular equation this looks good to me. Actually, it's the CN^ that is hydrolyzed (reacts with water) and the ionic
asked by ruby 
religion, help
what does it mean religious pluralism and interfaith movement. I have to answer this question. what effect do you think religious pluralism and the interfaith movement will have on the future organized religion? they mean having more than one religion and
asked by Kailin 
enviromental science
what is in a region of longterm atmospheric conditions Sulfur dioxide in the upper atomsphere cand lead to the formation of what that reduce the amount of sunlight reaching the surface of Earth
asked by Sequoia Barber 
Math Question
A company donated 200 books to a local library. If 70 of them are fiction, what percent of the donated books are fiction. 35% is the answer There are130 books that are nonfiction.
asked by Stormie 
math
determine the equation of the line in y=mx+b form that passes through 1. (8,1) & (9, 2) 2. (3,7) & (5, 9) 3, (4,0) & (4,6) Part B ) For each equation Rewreite the y=mx+b equation in general form Ax+by+c=0 where A is positive b and C are integers In
asked by thomas 
unscrambling a French word associated with art
unscramble tertcueas (it's in french and the beginning is les...) This might work: http://www.ssynth.co.uk/~gay/anagram.html Be sure to click the circle by "French," and be sure to uncheck the box before "Include singlecharacter words (a and I)"  !! =)
asked by Jacky 
microeconomics
If the technology for producign a good improves and at the same time,the price of a substitute good falls, then the quantity bought and sold of the first good will increase. True, False, or Uncertain. Explain.
asked by Brittany 
math
this question concerns the function f(x)=2x3+3x2+12x+10 (a)find the stationary points of this function using the strategy to apply the first derivative test,classify the left hand stationary point found in part (a) find the ycoordinate of each of the
asked by hanny 
Essay writing
Can u help me plz, i have to write an essay on "What is the place of animals in the lofe of Man?" Thank u :) ... in the life of man  ?? Here are a few websites that are excellent about leading you through the writing process in order to end up with a
asked by Ishani 
Macroeconomics
Economists have found that a good approximation of value added production fucntion is given by Y=TFP*(K^alpha)*(L^alpha) TFP is Total factor Productivity K is capital stock L is quantity of labor used alpha is a paramater around 1/3. How is value added
asked by joe 
Calculus
1.
asked by Dee 
Physics
Look up or derive the frequencies of the standing waves of a length of wire, L, clamped at the ends and under tension. What are the similarities and differences between a vibrating string and a resonating pipe? Does the diameter of the wire matter? Does
asked by Krys 
math
What are Base Ten Blocks? Since this is not my area of expertise, I searched Google under the key words "base ten blocks" to get these possible sources: http://www.susancanthony.com/Resources/base10ideas.html http://www.learningbox.com/base10/ From what I
asked by Miranda 
Chemistry
Write the balanced camical equation for the complete combustion of propane C3H8, a fuel used in gas grills (carbon dioxide and water are products). This is the WRONG answer that I got... 2(C3H8) + 7(02) > 3(CO2) + 8(H20) Can anybody help me? 2(C3H8) +
asked by Kaitlyn 
math check
1 four buttons have diameters of 5/8 , 3/4, 9/16, and 7/8 which buttons is smallest? answer 9/16 2. I spent 1/3 of my time doing math homework and 2/7 preparing for a history test . what fraction of study time remain? answer: 13/21 3. least common multiple
asked by larry 
Math/Chemistry
We were given an assignment to find a formula for finding the density of water. I wasn't in class when the assignment was given, but the teacher gave the class two values: density H2O at 20 degrees C= .998823 g/mL density H2O at 25 degrees C= .99707 g/mL A
asked by Chris 
math
who created math
asked by jose 
Math
To get the lower quartile and upper quartile do I get the median then find the median of the numbers above and below the median? Yes.
asked by Austin 
Budget constraint
X=view of the sea Y=wine Price of X: Px=0 Price of Y: Py=5 Income=10 Assume that a person does not look at the view beyond the point that bores him (when the marginal utility is negative) a) Sketch the budget constraint I know the yint is 2, but i am not
asked by Summer 
Science!
Which factors that affect rate involved in making a campfire? temperature, amount of cooling wind, size of tender, dryness of tender, dryness of wood. Of course if you douse the wood with kerosene, all this is moot.
asked by Ebby 
would someone please check this math
1 four buttons have diameters of 5/8 , 3/4, 9/16, and 7/8 which buttons is smallest? answer 9/16 2. I spent 1/3 of my time doing math homework and 2/7 preparing for a history test . what fraction of study time remain? answer: 13/21 3. least common multiple
asked by larry 
chem
copper has two naturally occurring isotopes. Cu63 has a mass of 62.939 amu and relative abundance of 69.17%. Use the atomic weight of copper to determine the mass of the other copper isotope. How do I do this? Atomic weight=62.939*.6917 + x (1.6917)
asked by Jill 
chemisty problem help
Carbon12 contains 6 protons and 6 neutrons. The radius of the nucleus is approximately 70 pm. Calculate the volume of the nucleus and the volume of the atom. What percentage of the carbon atom's volume is occupied by the nucleus? Can someone tell me how
asked by Tagen 
pre algebra
14 is what percent of 200 100/200 =x/14 read as 100% is to 200 as x% is to 14 solve for x by cross multiplying x=7 check it .07 times 200 = 14 vola!
asked by jen 
math
can some one please help me with the following questions as i don't understand them please (a) write down the derivative of each of the functions f(x)=E7x and g(x)=cos(2x) using the product rule differentiate the function k(x)=E7xcos(2x) (b)write down the
asked by hanny 
science
What makes the subject of star formation so difficult and complex A It is so slow that no visible proof of of it exists B Star formation is too expensive to study in detail C Stars live too long to be observed from birth to death D Clouds, fragments,
asked by bolometric 
math check please
1 four buttons have diameters of 5/8 , 3/4, 9/16, and 7/8 which buttons is smallest? answer 9/16 2. I spent 1/3 of my time doing math homework and 2/7 preparing for a history test . what fraction of study time remain? answer: 13/21 3. least common multiple
asked by larry 
communications
First, realize that all of us make mistakes. Your letter should be polite and to the point. Explain the situation and the solution you want, i.e., corrected checks at no fee and the fee charged taken off your account. Your local bank made a mistake on your
asked by Ms. Sue 
Math
How do I draw Ten Base blocks to show the number 420?
asked by Miranda 
math
How do I draw Base Ten Blocks to show 420?
asked by Miranda 
physics
Please could someone advise me on answering this question. I need to explain why when infrared radiation falls on fluorescent material no visble light is emitted. Is this something to do with infrared being at the lower energy end of the spectrum? I would
asked by Lucy 
physics
What's inertia? Inertia is the tendency of an object at rest to remain at rest; or the tendency of an object to continue moving if it is moving. In plain language, it's the tendency of an object to want to continue doing whatever it's doing. I had a
asked by Jacob 
math
would someone check these please 1. find the square root of 25 answer 5 2. find the median of the following set of numbers 33,72,23,27,77,68,85 answer 68 3. find the mean of the following numbers 13, 15,18,18,18,19,22,26,28,33 answer 21 4. find the mode
asked by carla 
Math
Rates And unit rates 120mi. to 10 gal of gas I'm not sure what you are asking, but this reduces to 12 miles per gallon. Does that help? If not, repost your question in different terms. Thanks for asking.
asked by Ruthie 
critical thinking
what is the rhetorical device for: What is the difference between "sugar free" and "no sugar added"? sugar free means no sugar at all and non sugar added means it has natural sugar nd they don't add any extra bob do you know what the rhetorical device used
asked by christine 
Math finding equation
Can someone explain to me how to find the equation pf the line in the form Ax + By + C =0 if a) parallel to x=3 and passes through (4, 3) b)perpendicular to y=4 and passes through (1, 1) c) passes through the xint of y=2x6 and yint of y=3x+6 If it is
asked by thomas 
science
what is the difference between a theory and hypothesis? I got this off another site i hope it helps.. Scientific Laws, Hypotheses, and Theories Lay people often misinterpret the language used by scientists. And for that reason, they sometimes draw the
asked by Jamie 
correction of math
can someone correct this for me please. Directions: Solve the system by substitution. x + y = 12 y = 2x this is what i did: in the first equation i substituted y for what i have in the second equation so now it looks like this: x +2x = 12 3x = 12 x = 4 now
asked by jasmine20 
correction of math
rewrite the equation 2x3y= 6 as a function of x. My answer. f (x) = (2)/(3) x + 2 No. 2x=3y  6 divide by two. x=3/2 y 2 hold on i was looking it over. wouldn't it be: 2x3y=6 would actually be: 3y=2x6 y= 2/3x+2 because you said that it would be
asked by jasmine20 
percent
how to change percentage to numbers Move the percent sign two places to the left. Add a decimal point there. Actually, don't move the percent sign at all. Get rid of the percent sign. Think about what percent means: Per (each) Cent (the prefix meaning 100.
asked by carmen 
please helpplasma membrane
I got this question marked wrong on a paper. Unfortunately, my prof didn't explain. _________________ subtances can pass through the plasma membrane. I put "nonpolar". What is wrong with this and does anyone know the correct solution/answer? Thanks all.
asked by Nadia 
microeconomics
If the price of oil falls below $50 per barrel, then the supply of the goods and services whose poduction involves a lot of oil will increase. The incresase in supply will cause the prices for these goods and services to fall. True, False or Uncertain.
asked by Brittany 
microeconomics
If the technology for producign a good improves and at the same time,the price of a substitute good falls, then the quantity bought and sold of the first good will increase. True, False, or Uncertain. Explain. Take a shot. Hint: draw existing supply and
asked by Brittany 
microeconomics
Other things equal, a big increase in the mimimum wage would cause the quantity demanded, but not eht demand, for unskilled labor to decrease. True, False, Uncertain, Explain Take a shot. Hint: a change in demand is a shift of the demand curve, a change in
asked by Brittany 
ETH123
What are the most significant similarities between the Chinese American and Japanese American [cultural] experiences? What are the differences? Please refer to this post, recently answered: http://www.jiskha.com/display.cgi?id=1170193455 =)
asked by Mark 
Verb tense
As of December 1, Ira and Sandy will have been going together for three years. If you mean last December, then it should read "As of December 1, Ira and Sandy have been going together for three years." If you mean the next time we get to December 1 (in the
asked by jannice 
science
How long does it take an M type star to form, compared to the time for a solar type star to form? A half as long B about the same time C twice as long D 20 times as long E 200 times as long dont know........ look at google
asked by bolometric 
combinaations of functions
f(x)=x2+1,g(x)=x4, (fg)(1)
asked by Abdul Dauda 
socal
if i have to do reserch about french guiana and i cant find information on the internet or books. what should i do Thank you for using the Jiskha Homework Help Board. Not to worry on French Guiana! I have more if you need it, but here's a start for you:
asked by tara 
french
can you tell me which words are feminine or masculine radiateur miroir joueur du cd calendrier réveil boîte des bijoux lampe téléphone mobile vêtements bouteille de l'eau many thanks Thank you for using the Jiskha Homework Help Forum. First of all, if
asked by liza 
geography
Whats a good site to go to get information about a county? The information is just the capital, culures, stats, basic information that's all. Thanks
asked by Mikey 
Biology
Is there a difference in muscle tone between the dominant forearm and the other forearm? This would depend on how much each arm is used or exercised. If the person greatly favors the either arm, that arm would have more "muscle tone." In exercising, many
asked by JYD 
Science
What landform is created when plares separate? a ridge is formed...EX: MidAtlantic Ridge Check this site. http://geobytesgcse.blogspot.com/2007/01/plateboundaries.html like i said above a ridge is formed!!!!
asked by Hannah 
Math
Amayor has a friend in publishing who tells him they have just published 20 new books and tells him he may pick 10 of them. a.) How many different selections can the mayor make? b.)If the govenor picks ten distinct books, how many ways can he make his
asked by Dustin 
Chemistry
Can someone explain in easier terms the spontaneous process, entropy, and free energy. The textbook is hard to understand. Just a simple explanation. Thanks. Appreciate it! Free energy is the amount of energy that can be released in a chemical reaction. If
asked by Maria 
ALGEBRA2
100Y^24Z^2 What is the problem? Factor? It is a difference of two squares.
asked by RICK 
windows 2003
You create a new folder called Catalogs on the second drive in the server and copy the 50 catalog files into that folder, and then you immediately create a differential backup of the entire drive and store the tape for archive purposes. That night, you
asked by Anonymous 
Science!
Which would spoil more quickly ground beef or steak? You have to define "spoil". If you mean bacteria that grows in the presence of air, then ground beef. It has been stirred up, bacterial mixed throughout, and exposed to air. yea that's what i mean
asked by Ebby 
science
What steps do you think can be taken to reduce the harmful effects of human activities on biogeochemical cycles? Which businesses would these changes impact the most? To assess the harmful effects of human activities, you first need to know about the
asked by David 
pre algebra
10 is what percent of 200 20%
asked by jen 
correction of math
given f(x) = 5x  3, find f (1). My answer: f(1)= 5(1)3 = 53 = 8 correct
asked by jasmine20 
Unscrambling
reatstuec in French (begins with les) Thank you for using the Jiskha Homework Help Forum. Sorry but it's too late this evening for me to even think. Usually an exercise like this would use the vocabulary you have been studying. Without knowing your
asked by Jacky 
Poetry: The Next War Wilfred Owen
I'm having trouble analyzing the second verse. The first one talks about the different ways that death has faced soldiers. I think that the second one is about future of wars? maybe... Also what is the importance of the quote from Siegried Sassoon at the
asked by Lisa