Questions Asked on
March 1, 2007

chemisty help
for the reaction shown, compute the theoretical yield of the product in grams for each of the following initial amounts of reactants. Ti + 2F2 to make TiF4 There are 3 sub questions for this. Help me out with one, then I'll try to figure out the rest.
asked by Becky 
chem
I can't seem to figure this out! I know I have to use mass to mass conversions though. Can someone help me out? Hydrochloric acid can dissolve solid iron according to the following equation: Fe + 2HCl to form FeCl2 + H2 a) How much HCl in grams would you
asked by Abby 
to bobpursley
An emergency breathing apparatus often placed in mines works via the following chemical reaction: 4KO2(s) + 2CO2(g) to make 2K2CO3(s) + O2(g) If the oxygen supply becomes limited or if the air becomes poisoned, a worker can use the apparatus to breath
asked by Jenn 
Physics
A sky diver of mass 80.0 ks jumps from a slowmoving aircraft and reaches a terminal speed of 50.0 m/s. a) What is the acceleration of the sky diver when her speed is 30.0 m/s? What is the drag force on the diver when her speed is b) 50.0 m/s? c) 30.0 m/s?
asked by Jean 
Physics
Calculate the force required to pull a copper ball of radius 2.00 cm upward through a fluid at the constant speed 9.00 cm/s. Take the drag force to be proportional to the speed, with proportionality constant 0.950 kg/s. Ignore the buoyant force.
asked by Jean 
psychology
Please note that we don't do students' homework for them. Our tutors try to give you the information to help you complete your assignment on your own. Once YOU have come up with a response to YOUR questions, please repost and let us know what you think.
asked by Writeacher 
Physics/Math
A cold package of hot dogs slides rightward across a frictionless floor through a distance d = 20.5 cm while three forces are applied to it. Two of the forces are horizontal and have the magnitudes F1 = 5.00 N and F2 = 1.00 N; the third force is angled
asked by Technoboi11 
physics
Consider an object on which the net force is a resistive force proportional to the square of its speed. For example, assume that the resistive forve acting on a speed skater is f=km[v^2], where k is a constant and m is the skater's mass. The skater
asked by Jean 
chemisty
Many home barbecues are fueled with propane gas (C3H8). How much carbon dioxide in kilograms is produced upon the complete combustion of 18.9 L of propane (approximate contents of one 5gal tank)? Assume that the density of the liquid propane in the tank
asked by Carry 
chem
Consider the following reaction: 2 CH3OH + 3O2 to form 2 CO2 + 4 H20 Each of the following molecular diagrams represents an initial mixture of the reactants. How many CO2 molecules would be formed by complete reaction in each case? How do I use the
asked by david 
Physics/Math
A force F = (4.0 N)i + cj acts on a particle as the particle goes through displacement d = (3.4 m)i  (2.0 m)j. (Other forces also act on the particle.) What is the value of c if the work done on the particle by force F is each of the following? (a) zero
asked by Technoboi11 
Geometery
How do I solve this? On my assignment it says find the area inside the square, but outside the circle, given that the radius of the circle is 2 ft. Use 3.14 for ^ I have a picture of a square with a circle in the square, with a base 6 ft. and height 6 ft.
asked by Hayley 
Economics
6. The chapter uses the analogy of a "leaky bucket" to explain one constraint on the redistribution of income. a. What elements of the U.S. system for redistributing income create the leaks in the bucket? Be specific. b. Do you think that Republicans or
asked by Sarah 
geo area & volume
ok it asks me 2 find the lateral area of the cylinder ( the radius is 5 n the hight is 5) can some 1 help me with this please 392.5 Prinness, I think that 392.5 is pi*r^2*h, or the volume of the cylinder. This question asks for the lateral area. Lateral
asked by martha 
science
http://www.google.com/search?as_q=volcanoes+&hl=en&num=10&btnG=Google+Search&as_epq=ring+of+fire&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_nlo=&as_nhi=&as_occt=title&as_dt=i&as_sitesearch=&as_rights=&safe=images thankx kid wat is the ring of
asked by Lance 
Easy chem question... me=braindead, help please?
It's been so long I forget which ones are which. My balanced equation is Sr(NO3)2 + 2KIO3 > Sr(IO3)2 + 2KNO3. It wants the total ionic and the net ionic Thanks ^^ (not just looking for answer, want explanation too please, just a short one) In aqueous
asked by Angie 
Calculus
Boats A and B leave the same place at the same time. Boat A heads due North at 12 km/hr. Boat B heads due East at 18 km/hr. After 2.5 hours, how fast is the distance between the boats increasing? You are looking at a rightangled triangle, let S be the
asked by Mischa 
psychology
We don't just answer questions here. We help. So at least tell us your best thought out answer and why you chose it. Then we'll help. A truck gets stuck under a bridge. Several towtrucks are unable to pull it ou. At last a little boy walks up and asks the
asked by Lance 
Financial Analysis  free cash flows
b. Do negative values of free cash flow in way alter or invalidate the notion that a company's fair market value equals the present value of its free cash flows discounted at the company’s weighted average cost of capital? Suppose a company's free cash
asked by Tia 
Calc
The radius of a sphere is increasing at a rate proportional to its radius. If the radius is 4 initially, and the radius is 10 after two seconds, what will the radius be after three seconds? dR/dt = c R Integrating this differential equation gives you ln
asked by Mischa 
Physics/Math
A single force acts on a 5.0 kg particlelike object in such a way that the position of the object as a function of time is given by x = 3.0t  4.0t 2 + 1.0t 3, with x in meters and t in seconds. Find the work done on the object by the force from t = 0 to
asked by Technoboi11 
Physics
With the engines off, a spaceship is coasting at avelocity of +260m/s through outer space. The ship carries rockets that are mounted in firing tubes, the back ends of which are closed. It fires a rocket straight ahead at an enemy vessel. The mass of the
asked by Cavin 
chemistry
i need to deduce the type of bonding that holds sodium cyanide together and write a balanced equation for sodium cyanide dissolving in water any help would be appreciated sarah Na^+ + :C:::N:^ Na to CN bond is ionic (more or less). CN bond is covalent.
asked by sarah 
Science (physics)
You watch a distant woman driving nails into her front porch at a regular rate of 1 stroke per second. You hear the sound of the blows exactly synchronized with the blows you see. And then you hear two more blows after you see her stop hammering. How far
asked by Courtney 
Inverse of log function
Find the inverse of f(x) = log(2+x)  4 the base is "a" Call f(x) y y = loga(2+x) 4 y+4 = loga(2+x) a^(y+4) = 2 + x x = a^(y+4)  2 drwls, you have merely solved the equation for x. The question was to find the "inverse", so the actual answer should be y
asked by Jen 
history
what is socratic method? i heared a lot of different stuff!! IDEAS PLZ Thank you for using the Jiskha Homework Help Forum. This is "thinking critically" and that can be done by using guided questions. Here is a good definition:
asked by david 
law
can someone help me add on or correct what i have. I have to pick from these four categories that a juvenile could fall under if an action is being made. I am putting the letters that i think fall under each action. There could be multiple for the
asked by kln 
calculus
derivatives differentiate y=x^7/3 So far I have Y=7/3X Is this all there is to this problem? Using the power rule, you bring the exponent down, just like you did. Then, you subtract one from the given exponent to get the new exponent. 7/3  1 (which is
asked by dee 
English Paper
right so i have this persuasive research paper i have been slaving away over, and i finished it but i need a creative title and im going blank. THe topic is the sterilization of the mentally ill, (so theycant have kids) and my position is for it. I cant
asked by emily 
U.S. HISTORY
how does the philosophy of franklin roosevelt resemble the philosophy of modern day Democratic party? The Democratic party still favors Social Security, Deposit Insurance, unemployment insurance and regulation investments to try to prevent fraud. It
asked by INEEDHELP!!! 
Math
can someone help me with figuring out Multiplying, simplifying and applications, Division and applications. Help. Do you have a specific question?
asked by Lynn 
physics helppp!
The coeffcient of friction between the 7.9 kg mass and the table is 0.55, and the coeffcient of friction between the 5 kg mass and the table is 0.38. Consider the motion of the 37 kg mass which descends by the amount of y = 0.45m after releasing the system
asked by kitt 
Thesis help
Music lovers should look into pop, rock and r&b for a certain type of music. How does this look for a thesis statement? Ugh, I can't get it to sound right. How does this look: Music is a big part of the world today lets look into r&b, pop and rock to see
asked by Confizzled 
psychology
The study of what motivates some of us to do well in school or on the job would fall in the area of what research? A. Cognitive B. Learning C. Perception D. Personality Drive to Achieve: that is in personality.
asked by Lisa 
ela
thankx who is alice walker http://www.google.com/search?q=alice+walker&rls=com.microsoft:enus:IESearchBox&ie=UTF8&oe=UTF8&sourceid=ie7&rlz=1I7SUNA Lots of information in these websites. =)
asked by jose 
math
wat is a corresponding angle.............. in the math 8th grade is really most of the test goin to be angles In triangles, it is the angle between two specified sides. It also refers to tha angles formed when one line cuts through two or more parallel
asked by jose 
social studies
What is the capital city in the African country?Also What Pyrenees mountains boreder Spainand this European counttry? Capital city in WHICH African country? There are many countries on the African continent. Go to http://www.answers.com and enter pyrenees
asked by Anonymous 
Example Essays
Mkay, I have a five paragraph essay due by tommorow. Its to be an example essay, but I don't have a idea OR a plan on what to write. I am confused {confuzzled} and am looking for a fairly easy example essay to write. I will need to use the Seven Sentence
asked by Confizzled 
physics problem!
The spring constant of a toy dart gun is 4442 N/m. To cock the gun the spring is compressed 1.5 cm. The 8 g dart, fired straight upward, reaches a maximum height of 26 m. The acceleration of gravity is 9.81 Determine the magnitude of the energy dissipated
asked by kitt 
Magical Realism
I need help thinking of topics for a magical realism paper http://www.google.com/search?q=magical+realism&rls=com.microsoft:enus:IESearchBox&ie=UTF8&oe=UTF8&sourceid=ie7&rlz=1I7SUNA Read through some of the articles in here, and maybe something will
asked by NIQUEFROMTEXAS 
history
Cavalry was the part of the army that was on horseback. http://www.google.com/search?q=cavalry+civil+war&rls=com.microsoft:enus:IESearchBox&ie=UTF8&oe=UTF8&sourceid=ie7&rlz=1I7SUNA Lots of information in these websites. =) what was the civil war
asked by Writeacher 
"It Happened To Nancy'
How do you feel about what happened to Nancy? *My homework is to create a table showing what people felt about what Happene to nancy. Thank you for using the Jiskha Homework Help Forum. I answered this earlier but I see it didn't post. First of all, make a
asked by Margie 
Econ T/F
yes, its a true or false question is this a true or false question? Suppose that after a price change, the income effect is zero, but the substitution effect is not. For such a good, the quantity demanded is directly related to its price. oh well I think
asked by Elle 
drwls, or other tutors
does my last postage seem correct for the answers that i got. The one that doesn't have a reply. See previous reply to your post.
asked by jas20 
Physics/Math
A can of sardines is made to move along an x axis from x1 = 0.2 m to x2 = 1.2 m by a force given by F = iF0exp(0.4x), with x in meters and F0 = 4.5 N. (Here exp is the exponential function.) How much work is done on the can by the force? Work is the
asked by Technoboi11 
Dr Bob 222
You answered a earlier post on a question for someone with the same question I am trying to answer. The hydrolysis of tocainide you stated only the NH2 group hydrolyses NH2 + HOH > NH3^+ OH^ I understand that part but I need to understand why the amimine
asked by Lucy 
History
What was the first nature reserve? In the US? http://en.wikipedia.org/wiki/Nature_reserve =) Please check the history section of the above web site for a nature preserve in the third century B.C.
asked by RHIANNON 
statistics defns
What is the coefficient of variation and how do I calculate it from a dataset? coefficient of variation is simply the standard deviation divided by the mean.
asked by weldon 
math
can someone show me the steps for this problem because i got it incorrect in my exam. Solve each of the following quadratic equations. 4x^2=13x+12 what i had put was that x is 3/4 and x is 4 but i just got my result back and it was wrong... 4x^2 13x _12
asked by jas20 
financial mathematics
jeromeborrowed an amount of money on 16th june 1999. he has to pay Ri7500 back on 25th feb 2000. what was the amount borrowed if simple interest of 26% is chargedd? qn 2. For 20yrs sidney deposited R200 every month into an account. this account earned 15%
asked by rita 
Geometery
A water storage tank is shaped like a circular cylinder with half of a sphere at each end. Find the volume of the tank if the cylindrical section is 100 cm long with a 40cm diameter. Use 3.14 for ~~ Be sure to round the final answer to two decimal places.
asked by Hayley R. 
Physics
A bat flying in a cave emits a sound and receives its echo 1 s later. How far away is the cave wall? is it 340.29 m? the speed of sound is 340.29 m/s i believe v = d/t d = (t)(v) d = (340.29)(1) Nope but thanks for trying :)
asked by Courtney 
math
Students in an English class need a mean of at least 90 points on four tests to earn an A. One student has scored 87,92,85. Write and solve an inequality to find what score the student needs on the next test to earn an A. 020714 I think that's it xDDD
asked by yo katie p 
Geometry
Find the perimeter of a rectangle that is 12ft. by 4 1/2 ft. 12+12+4.5+4.5= 33 how old are u?
asked by Fionna 
Math!
Factoring Completely! 13b^213 I got (13b13)(1b1). On my test my teacher said it was party wrong.And she underlined the two Thirteen's i had in my answer. And i don't understand why!? _______________________________________ Also on another one.The
asked by megan 
math
Ok The Galtins are buying a carpet for their home. They need about 1,175 square feet of carpet. The carpet they buy is sold by the square feet. What is the estimate of number of yards the Galtins need for thier home? divide square feet by 27 to get square
asked by oath 
social studies
how did women help prepare for the civil war??? i cant find in s.s book you should double check your book. if you cant find it in there you could use the internet, but i would check the book
asked by avery 
Science
Maybe "sleep mode"? http://www.answers.com/hibernate http://library.thinkquest.org/TQ0312800/hibernate.htm http://en.wikipedia.org/wiki/Hibernation =) This was an extra credit Q on a 6th grade science test.. "What do we call the period of hibernation by
asked by Writeacher 
science
http://en.wikipedia.org/wiki/Arctic_Circle what is the artic circle? what is the line of cancer and capricorn?
asked by Lance 
Strategy
How are the tactical plan and the goals related to longterm objectives (LTO) and Critical Success Factors in your experience? IDK How can you be successful in reaching goals, if you don't define what your goals are and develop specific methods for
asked by Ms Brown 
Physics/Math
Two vectors are given by a = 3.3i + 6.5j, and b = 2.5i + 4.9j. Find a) a·b = b) (a + b)·b = c) the component of a in the direction of b = a) (3.3x2.5) + (6.6x4.9) = b) (5.8x2.5) + (11.4x4.9)= c) (a·b)/(magnitude of b)= Great! I got it :)
asked by Technoboi11 
Physics/Math
What work is done by a force (in newtons) F = 3.1xi + 3.1j, with x in meters, that moves a particle from a position r1 = 2.1i + 2.5j to r2 =  4.9i 3.9j? Work is the dot product of Force and displacement. Change in displacement is r2 minus r1. I will be
asked by Technoboi11 
Science  Volcanos
In science were doing volcanos, earthquakes, tectonic plates and things like that. I'm looking for a site or perhaps you could tell me, a site that show how volcanos are awoken and erupt and stop bu not in so much detail like wikipedia. That was a
asked by VampirexGabrielle 
physic
What does "seven earths" as mentioned in surah alTalaq acctually mean? It means that, according to the Quran, Allah created seven heavens, each contining one earth.
asked by suhana 
math
I don't want to get this wrong for this homework that i have to turn in can someone please relook at it and tell me if it is correct plz.... solve. x^2+3x18 my answer is x=3 and x=6 yes.
asked by jas20 
math
How do you find the slope of y=3/4x+5 (5*1000)+(3*1000)+(7*10) 15%times360=
asked by Dominique 
Science
There are more earthquakes along the western coast of the United States than along the eastern coast. Explain. thank you Where do earthquakes tend to occur, in terms of the tectonic plates of the earth?
asked by Prinness 49 
algebra
Can someone help me with this problem please? rationalize the denominator and simlify the answer: 5/2 + the square root of 3 Do you mean 5/(2 + sqrt 3) ? What you wrote could also be interpreted as 2.5 + sqrt 3. You need to be more careful to use
asked by Maria 
Geometry
Find the area of the polygon 9 in. by 11 in. height 3 wouldn't it be 30 in^ It depends on the polygon.
asked by Fionna 
math
how do you check an answer if 4(j7)=12 4j28=12 16=4j j=4 is this rite?how do you check if rite? It is wrong. When you add 28 to both sides, one gets 4j= 40 j= 10 in baseball, the pither's mound is 6 in. more than 20 yd from home plate . how many feet is
asked by david 
ela
wat do u think bout the author sterling brown back in the 1900's http://www.google.com/search?client=opera&rls=en&q=sterling+brown&sourceid=opera&ie=utf8&oe=utf8
asked by ANAIS 
psychology
Which of the following is stressed by the APA professional code? A. high levels of competence, integrity, and responsibility B. use of the scientific method in testing hypotheses C. application of scientific research methods to the study of human and
asked by Lisa 
macroeconomics
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. =) Use the circular flow diagram to
asked by Writeacher 
sports
um...wasn't it the colts? wo won the super bowl in football no lik i sed
asked by Margie 
Econ T/F
A consumer with a fixed income buys two goods, X and Y. If her demand for both X and Y are unitary elastic, she must spend an equal amount on each good. take a shot, what do you think, and why? i think false, she doesn't have to spend equal amount?? I
asked by Elle 
Language/Grammar
Is (like) a linking verb? When used as a verb, "like" is an action verb. He likes her. She likes ice cream. They like their new coach. =)
asked by Michelle 
stocks
When IBM announces its intention to split its stock, let us say a split of 2:1, the news is interpreted as reducing the volatility of the DJ30, and it sometimes leads to an increase in the IBM share price, adjusted for the split. Explain the possible
asked by joe 
law
can someone help me add on or correct what i have. I have to pick from these four categories that a juvenile could fall under if an action is being made. I am putting the letters that i think fall under each action. There could be multiple for the
asked by kln 
HISTORY
What is the name of the first nature reserve Yellowstone National Park, established in 1872, is the world's oldest nature reserve.
asked by Rhiannon 
Math
Does unit rate always have to be on the bottom of a ratio? No.
asked by Kathy 
chemistry
Please can someone help me before i pull all my hair out i've been struggling with this for about a week CH2=CHCHOH ________' _______CH3 i need to polymerize this compound and draw the structural formula it needs to contain three monomer units and i need
asked by sarah 
polymerization of alchohol
CH2=CHCHOH  CH3 when the above compound undergo polymerizaing What is the polymer and the structure of the polymer obtained drawing should show three monomer unit. also include what type of polymerization involved in forming this polymer
asked by bonita 
chemistry
HOw can you make a low calorie gel with aspartame? How does it work? Thanks. Perhaps another tutor will understand your question but I don't. Perhaps you can clarify the question? Jello is available with aspartame and it is low calorie. Yeah, we were told
asked by Ally 
financial mathematics
Qn 1. The easy loan company has a finance charge of 0.089% per day on out standing balances.What is the effective rate? Qn 2. Seven days after Jay's company borrowed R10,000,000 interest to the amount of R37,876,71 had to be paid. The simple interest rate
asked by rita 
Math
i need help finding the slope of the line that passes through each pair of poinst. 1. (1,3),(4,3) 2.(5,0), (2,1) Divide (y2  y1) by (x2  x1). For (1), this would be 6/3 = ? Thank you. The first one came out to 2. The second one is not working out. I
asked by Elizabeth 
English
Just wanted to know if my answers are correct. Dangling Modifiers If your baby does not like cold apple juice, it should be heated. My answer: 1. If your baby does not like cold apple juice, the apple juice should be heated. When they are fresh, eating
asked by Ashley 
Science
How are the lower mantel and the inner core different? How are they the same?
asked by Prinness 49 
science
Name at least two processes that change Earth's surface quickly.
asked by Prinness 49 
Science
Which fish can live out of water for days at a time? isnt it like the snakehead or something? Well I heard of a speices of "alien meateating fish that can live up to like three days out of the water. But they were like some experiment or something. I
asked by michael 
Physics
The wavelength in air of a sound is 5 m. (a) What is the frequency of the sound? Sound can have any frequency. It is the SPEED of sound that remains constant, independent of frequency, at a given temperature.
asked by Courtney 
physics
(a) What is the wavelength of a 450 Hz tone in air?
asked by Courtney 
calculus
I am having trouble with this problem also derivative differentiate f(x)=(3x)^4(x+5)^3 so far I have 4(3x(x+5)^3+3(x+5)(3x) Not quite right. Treat it as d/dx[u(x) + v(x)] = u dv/dx + v du/dx u(x) = (3x)^4 v(x) = (x+5)^3 du/dx = 4(3x))^3 (using the
asked by dee 
physics help please
The two blocks are connected by a light string that passes over a frictionless pulley with a negligible mass. The 3 kg block lies on a rough horizontal surface with a constant coefficient of kinetic friction 0:3. The hanging block has a mass of 8 kg. The
asked by kitt 
science DrBob222NEED BY TOMMOROW MORNING AT 9:30!!
I need a website where you can find out about women in the field of engineering THANX :) Hope these are of some help. http://www.swe.org/check.aspx?bhcp=1 http://www.engineering.tufts.edu/wieo/index.html http://www.engineeringwomen.org/ (Broken Link
asked by vahnna 
english
What strategies might you use to communicate the use of data effectively in written business reports? You can write briefly and succinctly. Use of graphs and tables are also useful.
asked by jenna williams 
english
What quailities of an oral presentation are most important to you as an audience member? Explain your answer. eye contact, standing still, no distracting movements (hand guestures good if used effectively), don't just read speech, loud and clear voice, etc
asked by jenna williams 
Chemistry
How come two nonpolar substances are able to easily mix? Like dissolves like. Yes, I know that, but is there any explaination to that relating to the bonds? http://www.newton.dep.anl.gov/askasci/chem03/chem03348.htm
asked by Raj 
Calculus
How do you prove area of a circle? Integrate an incremental area dArea = r dr dTheta from r=0 to R, and Theta from zero to 2PI radians. Area= INT INT dTheta rdr dTheta Area= 2PI (1/2 R^2)= PI R^2
asked by Abigail 
Geometry
What is a Quadrangle, a rhombus and a parallelogram http://www.onelook.com/
asked by chris