Questions Asked on
February 12, 2009

physics
a remote controlled car's wheel accelerates at 22.4 rad/s^2. if the wheel begins with an angular speed of 10.8 rad/s what is the wheel's angular speed after exactly 3 full turns?
asked by luke 
Please Help Fast
A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until
asked by anonymous 
Chemistry
is CH3CH2N or NO2 a lewis acid?
asked by Anonymous 
Chemistry
Consider a .900 M Al(NO3)3 solution. This solution has a nitrate ion concentration of:
asked by Chris 
Chemistry
How many grams of NaC2H3O2 (M=82.034 g mol1) should be dissolved in 400 g of water to prepare a solution which is 11.28% NaC2H3O2 by mass?
asked by Chris 
Reiny! Reiny! Reiny! Answer Check and HW Help!
Translate to a system of equations and solve: 1) The sum of two numbers is 36. One number is 2 more than the other. Find the numbers. Answer: (17,19) 2) Find two numbers whose sum is 66 and whose difference is 18. Answer: (37,29) These ones I am not sure
asked by Britney 
9th grade
A 5kg rock is lifted 2 meters in 5 seconds. How much work is done? How much power is done?
asked by Lindsey 
social studies
How did the geography of ancient Greece cause it to separate into independent communities?
asked by Shan 
chemistry: equations and reactions
identify the products when the following substances decompose: 1) binary compoound 2) metallic hydroxide 3) metallic carbonate 4) the acid H2SO3
asked by Stephanie 
physics
I'm not sure how to solve this..a baseball is popped straight up into the air and has a hangtime of 6.25s. Determine the height to which the ball rises before it reaches its peak.
asked by jona 
world geo
An isthmus is a narrow strip of land located between two water bodies that connect two larger land areas.find a central american country that is an isthmus. i do not know how 2 answer this question:( please please help:) thank u
asked by eleny 
physics
need HELP!! which of the following exhibits parabolic motion a. stone thrown into a lake b. space shuttle orbiting Earth c. leaf falling from a tree d. train moving along a flat track which of the following does NOT exhibits parabolic motion a. frog
asked by y912f 
Stoichiometry Test
3.Empirical formula is C4H5N2O.Its molecular weight is 194.19g/mole.The "empirical formula weight is about 97.1g/mole.What is the molecular formula ?
asked by Cool Dom 
Stoichiometry Test
What is the percentage of oxygen in____? Mg(OH)2
asked by Cool Dom 
chemistry
the thing that is troubling me is that NO2 is not (NO2) does that change it from being considered a lewis base to a lewis acid?
asked by Anonymous 
Chemistry HELP!
A student placed 10.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until
asked by anonymous 
Intermediate Algebra Word Problem
A map's key indicates that 3/4 of an inch represents 60 miles. How many miles does 2 1/4 inches represent? in/mi 3/4 / 60 = 2 1/4 / x 3/4x = 60(2 1/4) .75x = 60 (2.25) .75x/.75x = 135/.75 x = 18mi. Is this correct?
asked by Jennifer 
Chem 12
Given the two reactions: 5Fe2+(aq) + MnO4(aq) + 8H+(aq) > 5Fe3+ (aq) + Mn2+(aq) + 4H2O(l) 2MnO4(aq) + 5C2O42(aq) +16H+ > 2Mn2+(aq) + 10CO2(g) + 8H2O(l) A.) Which reaction will occur at a faster rate? B.) Explain the reason for this result by
asked by Sam 
math
the roots of 2x^2  3x = 4 are a and b. find the simplest quadratic equation which has roots 1/a and 1/b
asked by isha 
chem
An aqueous solution of nitric acid has a density of 1.084 g mL1 and a measured concentration of 2.580 molar. What is the percent weight of nitric acid in the solution.
asked by Patty 
organic chemistry
in a reaction with 9fluorenol and sodium hypochlorite (with acetic acid) that is supposed to yield 9fluorenone, what could be a possible reason for error if the solution of 9fluorenol, sodium hypochlorite, and acetic acid was heated too high? (around 80
asked by Anonymous 
Geography
Name a large bay east of maine?
asked by Anonymous 
Stoichiometry Test
4.A compund is found to have(by mass)48.38% carbon,8.12% hydrogen and the rest oxygen.(What % is missing to make the sum 100 %?) That is,figure % oxygen.What is its empirical formula?
asked by Cool Dom 
algebra
when the temperature stays the same, the volume of the gas is inversely proportional to the pressure of the gas. If a balloon is filled with 87 cubic inches of a gas at a pressure of 14 pounds per square inch. Find the new pressure of the gas if the volume
asked by tonya 
sociology perspective
Every four years in the United States there is a presidential election, and after the election, nearly half the population readily accepts the leadership of the person for whom they did not vote. This is an example of: egalitarian authority charismatic
asked by dean 
PreCal (verifying trig identities)
How would you verify the identity? sin^1/2xcosxsin^5/2xcosx=cos^3xradsinx
asked by Crystal 
Algebra
Write a system of inequalities to describe the shaded area of the graph. This is the question on my homework today that i just don't get. My teacher said to use point slope form. y=y1+m(xx1) The coordianate points of the triangular area are line 1:
asked by Katy 
Chemistry! Please Help!
What mass of propanoic acid, CH3CH2COOH, pKa= 4.87, should be dissolved in water to 2.00L volume in order to produce a pH of 2.50? THANKS! J
asked by Jude 
math
How do you find the definite integral of an absolute function? ∫_0^32x3 lower limit= 0 upper limit = 3
asked by Stephen 
Quick Spanish
Complete the sentence with an appropirate adjective. Follow the model. modelo: David es un chico 'trabajador porque le gusta trabajar los sábados y domingos. 1. Nosotros somos los estudiantes más_______________del señor Unamuno. Please help with this
asked by Larry 
MathAlgebra
i don't understand how to graph an equation. can anyone help me please? i'll greatly appreciate it. Example: 3x+4y=12
asked by Amy 
Spanish
Fill in the brackets with a correct definite or indefinite article. 1. Nosotros somos (los) estudiantes de Buenos Aires. 2. Ellos son (los) amigos de Gisela. 3. Ustedes son (unas) personas estudiosas e inteligente. 4. Tu eres (el) hombre de Vallodolid. Are
asked by Larry 
math
does anyone know how to do pizzazz worksheets, i'm having trouble with mine.
asked by alex 
SCI 245
Discuss in 200 to 300 words, the importance of the science of geology to us as a civilization. Give at least two examples. For example, the ability to predict earthquakes and other disasters, or understanding mining and the use of natural resources
asked by troyer0269 
Engineering
Determine the required nominal diameter of a threaded steel rod to carry an axial load of 16,000 pounds in tension if the tensile stress of 20,000 psi is permitted.
asked by David 
Math
Which example is a function and which is not? Explain why. 1. Each student takes a selection of art classes. 2. Each student is placed in a math class. Please Help!! Thank You so much!!
asked by Happy Face! 
Chemistry!! Please Help!
What mass of propanoic acid, CH3CH2COOH, pKa= 4.87, should be dissolved in water to 2.00L volume in order to produce a pH of 2.50? THANKS! J
asked by Jude 
5th grade
The Texas state dish is chili. Alexi made 6 quarts of chili and served it at a party. He had 1/3 of the chili leftover. How many quarts did he have left? I can't figure this out! Please help, my math worksheet is talking about equivalent fractions!
asked by asia 
science
Why do most streams in NY state have a greater stream discharge runoff in spring than in summer? 1 Potential evaporation and transpiration is greater in spring than in summer. 2 More transpiration occurs in spring than in summer. 3 Most area of NY state
asked by Anonymous 
juvenile justice
What are the major differences between the contemporary criminal (adult) justice system and the juvenile justice system? Are the major differences appropriate, given the differences between adults and children? Explain your answer.
asked by susan 
chemistry
how much heat is absorbed if 200g of water changes from 20 C to 80 C?
asked by Renita 
art history help please!
If you could please check these and just let me know which ones are correct! also if you have any input on a better answer, or atleast where i can find a better answer, i would greatly appreciate it! This artist painted scenes of upperclass recreation:
asked by jeffery 
computers
2. Final Project: Bead Bar Systems Development Project • Resources: Appendix A, Information Systems Technology • Due Date: Day 7 [Individual] forum • Plan a systems development project for the Bead Bar, using the seven standard systems development
asked by Anonymous 
college
the relationship between the dosage, x, of a drug and the resulting change in body temperature is given by f(x)=x squared(4x) for 0 greater than or equal to x greater than or equal to 4. make sign diagrams for the first and second derivate and sketch the
asked by Olivia 
science
measurement of an average classroom door is closest to 1 meter
asked by dj 
Chemistry!!
At what initial concentration would a solution of acetic acid (ka=1.8x10^5) be 2% ionized? THANKS! J
asked by Jude 
6th grade
where can i get help with the geometric shapes
asked by daniel 
math
can anyone help me with this problem? 6x5y+20=0
asked by Nidia 
Unscramble a word
Can you unscramble these two valentines words for me? IENGTGER, AND RMIEDAR
asked by Sarah 
Chemistry
At what initial concentration would a solution of acetic acid (ka=1.8x10^5) be 2% ionized? I am stuck. Thanks J
asked by Jude 
Physics
A drowsy cat spots a flowerpot that sails first up and then down past an open window. The pot was in view for a total of 0.37 s, and the toptobottom height of the window is 2.20 m. How high above the window top did the flowerpot go? S= ut +(1/2)at^2 S=
asked by Andrew 
Precalculus
what is the area of a pastry used to cover a slice of bery pie having outer crust arc of 7.6 cm and a central angle of 30 degrees? My answer: 661.88 cm sqr Answer: 55.2 cm sqr Thanks.
asked by Tri 
government
What determines who holds the postion of speaker of the house?
asked by bri 
chemistry
can you check if I did the problems correctly? thanks! a soln of NaOH is prepared by dissolving 5.0g of NaOH in 500mL of water, the nadding additional water to make 1.0 L of soln. What is the pOH and pH of this soln? [OH]=(5g/40g)mol/1L pOH=log(1/8)=.90
asked by Anonymous 
statistics
I don't understand how to answer this: relate the three measures of central tendency to a normal distribution I looked it up online and it said that the mean, median, and mode are all the same but i don't understand how that can be
asked by katie 
statistics
How do ethics affect your chosen level of significance? I am not sure if I understand what the instructor is wanting can some look at my answer and see if I am close and if I am missing something Answer: The level of significance to my understanding is
asked by JOHN 
5th grade
how do you write a ten paragraph essay?
asked by katy 
chemistry IMPORTANT
we have to make an instrctinal packet showin relationships between moles and concentration. i cant find the following 1)how is the number of moles dissolved in a set amount of solvent related to the molarity? 2)how to determine the amount of solvent in
asked by lyne 
math
(dy/dx)=X^3/8  1/2x^3. what is sqrt( 1+(dy/dx)^2 ) and that multiplied by (dy/dx)
asked by jesse 
art
does anyone know where the yellow cow painting by Franz Marc i displayed?
asked by sophie 
science
As the temperature of soil decreases from 10 degree celcius, what will most likely happen to the infiltration rate of water through it? please help i have no idea about it. thank you.
asked by Anonymous 
To Stephanie  Com130
I've removed your post because it doesn't apply to the Jiskha forum. We have no way of reading your peer's posts on any Axia board. Please repost with your ideas about proposal writing and we'll be glad to critique them.
asked by Ms. Sue 
science
As redioactive material decays and the percentage of new material in the original sample increases, does the age of the sample substance increase, decrease, or remain the same?
asked by kerri 
chem
how do you prepare a solution using the proper lab equipment(both from dry solid and a stock solution) i researched it but all i found was the definition for stock solution any help please!!
asked by lyne 
college
How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another
asked by linda 
important operations
simplify (2x+3)(x4)= HELP !!
asked by gamefrog 
algebra
How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions?
asked by linda 
college
I need a full sentence outline on a thesis. The thesis is "Although children are taught the basics in school there needs to be more emphasis on the lower grades to be susre children who have difficulties are discovered early to get the help needed to stay
asked by Anonymous 
math
if the ones digit ofa numbre greater than 1 is 0, what factor or factors must that number have? a.2 only b.5 only c.2 and 5 d.neither 2 or 5
asked by Carol 
homework
where can I find more information on the stages of the general adaptation syndrome?
asked by Malkia 
math
what would the antiderivative of e^2x be? and if the antiderivative of that is 1/2e^2x, what would that antiderivative be?
asked by Lauren 
chem
A water solution which contains magnesium chloride as the only solute measured 232 parts per million chloride on an analytical instrument using a specific ion electrode as the sensor unit. When converted to moles per liter what value would you get for the
asked by Patty 
science
measurement of an average classroom door is closest to 1 meter
asked by dj 
Intermediate Algebra Solve
x + 1 / x = 3/2 x + 1(2) = 3x 2x + 2 = 3x 2x 2x 2/1 = 1x/1 2 = x Is this correct?
asked by Jennifer 
Stoichiometry Test
THIS TEST IS DUE IN 15 MINS AND I JUST NEED HELP ON HOW TO DO IT LIKE THE STEPS FOR THEM ??
asked by Cool Dom 
Biochemistry
I need to copare and contrast gel electrophoresis and paper strip electrophoresis... I know what both of them are, but I need to explain in terms of the charges on the proteins.. and I need to describe the polyacrylamide gel electrophoresis method in terms
asked by Andrew 
Algerbra
Help please show steps to solve. Two records and three tapes cost $31. Three records and two tapes cost $29. Find the cost of each records and each tape. No examples to guide me. thanks, Carol
asked by Carol 
Science
If a block could be molded into a flatter and longer shape, then which one would happen and can you explain? a. mass, volume, and density all would change. b. volume would change, but the mass and density would remaine the same. c. mass and volume would
asked by rachel 
Algebra
i need help on my homework. how can i graph this equation? y3=0
asked by Kia 
Chemistry
At what initial concentration would a solution of acetic acid (ka=1.8x10^5) be 2% ionized? Thanks
asked by Needs help, please! 
9th grade algebra
how do you solve and graph variable inequalities?
asked by ryan 
Maths
State the minimum or maximum value of Y and the corresponding value of X of Y=9(2X1)^2. Hence sketch the curve, indicating the Yintercept. Thank you a lot in advance.
asked by Zeba 
social studies
what natural resources made portland a good location for a city?
asked by stacey 
Algebra
Suppose that x = 2t and y = 4t+7. a. If x=7, what is y? b. If x=3, what is y? c. Find y in terms of x. I don't know how to solve this, since x and y are in different equations. Could you please walk me through it? Thanks!
asked by Olivia 
Engineering
5. Two pieces of steel are held together with six bolts. One end of the first piece of steel is welded to a beam and the second piece of steel is bolted to the first. There is a load of 54,000 pounds applied to the end of the second piece of steel. The
asked by David 
college
What is the molecularity of the elementary reaction? SO_3(g)>SO_2(g)+O(g)
asked by s1175 
Intermediate Algebra Simplify
Simplify: this is a triple decker fraction 1/a + 1/c divided by a^2  c^2 divided by ac I am stuck on this one please help.
asked by Jennifer 
law of motion
the strongest fundamental force.
asked by Sam 
Math
How long one can hold their breath can be calculated using the formula y=1.4g where y is the amount of time one can hold their breath in seconds and g is the size of their lungs in cubic centimeters. Is this a relation or a function? Explain why. Please
asked by ~{HAPPY FACE!!}~ 
Math
Which example is a function and which is not? Explain why. 1. Each student takes a selection of art classes. 2. Each student is placed in a math class. Please Help!! Thank You so much!!
asked by ~{HAPPY FACE!!}~ 
spelling
analogy for fly that has four letters
asked by westin 
english
can anyone find me chapter summaries for the book "the sturdy oak" please
asked by sam 
Intermediate Algebra Solve
Solve: 1/3  5/4t = 3/4  1/6t would I cross multiply? (1)(4t)  (3)(5) = (3)(6t)  4 I am stuck here, please help.
asked by Jennifer 
Algebra
I am thinking of a number.It is a multiple of 3 but not 6.It is greater than 25^2 but less than 30^2.The units digit is a perfect square and the sum of the other two digits is the square root of 81. What is my number? A threedimensional model of a city
asked by Christina 
Algebra 2
Can someone helpe me solve this equation . Help me break it down please..becuase i have tried to do it mnay times but have fallen short... [SQRT(x + 3)]  [SQRT(x  2)] =1
asked by George 
SOSE
WHY DID THE 1962 AVALANCH OF PERU HAPPEN
asked by ALEX 
math
how do I simplify? (secө/ (secөtanө))  secөtanө
asked by kayla 
lit.
persue:contract::
asked by elisha 
math
how do u solve x+3=0? its very confusing.
asked by Jessica 
math
x+5=3
asked by jr 
chemistry
A student adds 1.00x10^8 moles HCl to a liter of soln. The resulting soln will be acid, basic, neutral, or impossible to determine? I believe that it is impossible to determine, because it does specify that the temperature was at 25*C. Which of the
asked by Anonymous 
physics
1.if frequency increases twice, how it change the energy carried by one pulse? (It may have no effect) 2. if the humidity of the air increased, what quantities will be affected: frequency, period, speed, and wavelength
asked by jaden 
math
how do I do this? I think I have to simplify it? (sin^2ө + cos^3ө/sinө + cosө)+ sinөcosө
asked by maggie 
physics
which is the X axis and which is the y axis. Is there a way to remember it?
asked by d 
Science
How can you divide a mixture of iron and iron sulphide, without using a magnot?
asked by Karla 
math
(dy/dx)=X^3/8  1/2x^3. what is sqrt( 1+(dy/dx)^2 ) and that multiplied by (dy/dx)
asked by jesse 
art
i am doing a project about franz marc an i need some info on one of his animal paintings this info consists of: name: when it was made: how it was made: what it was about: does it tell a story: what is in it: is it happy sad boreing etc: how you feel: and
asked by sophie 
AED
help please... 350 to 500word response to the following: You have the ability to choose three or four books for your students. Based on what you have learned in this course, how can you assess the level of bias and stereotypes in the contents of these
asked by troyer0269 
math
A base raised to a NEGATIVE exponent is equivalent to _______________.??? plz help me with the word. thanks.
asked by Anonymous 
sociology
G. William Domhoff's view of the power structure of the United States most closely resembles the analysis of which sociological perspective? Functionalist perspective Conflict perspective Interactionist perspective Global perspective it isnt conflict, or
asked by dean 
PHYSCIAL EDUCATON
ANALYZE THE EMERGENCE OF PROFESSIONAL SPORT?
asked by MUNIR 
repost chemistry
A student adds 1.00x10^8 moles HCl to a liter of soln. The resulting soln will be acid, basic, neutral, or impossible to determine? I believe that it is impossible to determine, because it does specify that the temperature was at 25*C. I know that a
asked by Anonymous 
social studies
Portland, Oregon sorry
asked by stacey 
stats!
Abe looked at fundraising over the last decade. In the six seasons where the football team won less than 40% of the games (losing seasons) Abe was only able to raise an average of $1.2 million in contributions to the Athletic Department (adjusted to
asked by Peter 
Healthcare
I need some help with find information on what are the implications for patients? What types of reform efforts are being implemented to improve caregiver’s socialization skills?
asked by Kia 
French
Can someone tell me if these sentences are all grammatically correct? Merci! elle serait contente de nous conduire au magasin le 8 avril. Nous pouvons y emmener deux personnes.
asked by MJ 
science
Where does convergent motion take place?
asked by Emily 
205 ctr
Sure, I’ve heard that it’s better to not eat cheeseburgers every day, but it’s extra protein and protein is good for you.
asked by chris 
205 ctr
It’s disgraceful that a member of the Elks Lodge would go out to fast food restaurants every night. The Elks believe in family values, including homecooked meals.
asked by christina 
math
x + 5 > 9 =
asked by anmol 
psy210
where can I find more information about the steps of general adaptation syndrome?
asked by Malkia 
math
Can you explain this to me please? sin2 A + cos2 A = 1 ... (1) 1 + tan2 A = sec2 A ... (2) 1+ cot2 A = cosec2 A ... (3)
asked by Anonymous 
Stoichiometry Test
Thanks Damon i got a couple more lolz 2.Determine the formula mass of (NH4)2C4H4O6
asked by Cool Dom 
Chemistry
At what initial concentration would a solution of acetic acid (ka=1.8x10^5) be 2% ionized? Thanks Responses Chemistry  DrBob222, Thursday, February 12, 2009 at 10:00pm Let's call acetic acid HAc. Then the ionization is HAc ==> H^+ + Ac^ We will call the
asked by Chemistry  Repost for DrBob222 
Math
please explain to me how to figure out what fraction is greater. ex. 5/6 __ 1/8
asked by Kate 
math
what is one fifth of 123570
asked by leosha 
uop
: Reflect on your own worldview and compare it with the worldviews presented in the text. Provide examples of the benefits of your view to defend your position.
asked by brandy 
Math
How long one can hold their breath can be calculated using the formula y=1.4g where y is the amount of time one can hold their breath in seconds and g is the size of their lungs in cubic centimeters. Is this a relation or a function? Explain why. Please
asked by Happy Face!