MS
Most popular questions and responses by MS
chemistry
When heated, elemental phosphorus, P4, produces phosphine, PH3, and phosphoric acid, H3PO4. How many grams of phosphine are produced if 56 grams of P4 have react
asked on May 10, 2013 
calculus
Find complete length of curve r=a sin^3(theta/3). I have gone thus (theta written as t) r^2= a^2 sin^6 t/3 and (dr/dt)^2=a^2 sin^4(t/3)cos^2(t/3) s=Int Sqrt[a^2 sin^6 t/3+a^2 sin^4(t/3)cos^2(t/3)]dt =a Int Sqrt[sin^4(t/3){(sin^2(t/3)+cos^2(t/3)}]dt=a Int
asked on September 18, 2013 
math
according to a college survery, 22% of all students work full time. find the mean for the number of students who work full time in samples of 16. round to the nearest tenth how do we do this on a TI84 calculator
asked on July 25, 2016 
physics
A child operating a radiocontrolled model car on a dock accidentally steers it off the edge. The car's displacement 1.0 s after leaving the dock has a magnitude of 12.8 m. What is the car's speed at the instant it drives off the edge of the dock?
asked on January 26, 2011 
MSJH
When heated, elemental phosphorus, P4, produces phosphine, PH3, and phosphoric acid, H3PO4. How many grams of phosphine are produced if 56 grams of P4 have reacted?
asked on May 10, 2013 
English
What is the order of adjective in a sentence?
asked on November 11, 2018 
SS
Throughout the 1900s, many countries in Africa and Asia gained independence from European colonial powers. India is one of these countries, having gained their independence from Britain in 1947. Why did people in India want independence? In what ways was
asked on November 16, 2017 
calculus
Find circumference of the circle r=2acos theta. s= Int (0 to 2pi) of Sqrt(4a^2cos^2 theta+4a^2sin^2 theta)d theta =Int (0 to 2pi)2a*Int theta d theta =2a(2pi0)=4a*pi Book shows 2a*pi. Am I wrong somewhere?
asked on September 16, 2013 
Calculus
s=çdx/(4+5cos x). By using tsubstitution, i.e. t=tan(x/2) we get cos x=(1t^2)/(1+t^2) and dx=2dt/(1+t^2). Substituting in s and simplifying, we get s= 2çdt/4(1+t^2)+5(1t^2)=2çdt/(9t^2). Using standard result çdx/(a^2x^2)=1/a*arctanh (x/a)
asked on October 30, 2013 
physicsn
An Olympic turkey moving at 20.0 m/s down a 30.0° slope encounters a region of wet snow and slides 145 m before coming to a halt. What is the coefficient of friction between the turkey and the snow? The accelerations down the hill is 1.4 m/s^2.
asked on October 27, 2015 
Calculus
Find the area cut off by x+y=3 from xy=2. I have proceeded as under: y=x/2. Substituting this value we get x+x/2=3 Or x+x/23=0 Or x^23x+2=0 Or (x1)(x2)=0, hence x=1 and x=2 are the points of intersection of the curve xy=2 and the line x+y=3. Area under
asked on April 1, 2014 
Calculus
Q: If y=sinx/(1+tanx), find value of x not greater than pi, corresponding to maxima or minima value of y. I have proceeded thus Equating dy/dx=0 we get{ (1+tanx)cosxsinx.sec^2 x}/(1+tanx)^2=0……..(A) Or cosx+sinx=sinx.sec^2 x or cosx= sinx.sec^2sinx
asked on June 16, 2014 
Calculus
How to integrate dx/(45 sin x) using tsubstitution method(i.e. taking tan x/2=t)?
asked on October 31, 2013 
science
I need a reason the land forms canyons and volcanoes are similar thank you
asked on November 16, 2017 
physics
An experiment makes use of a water manometer attached to a flask. Initially the two columns in the gas manometer are at the same level and the air pressure in the flask and both sides of manometr is 1 atm. The experiment is set up when the air pressure is
asked on March 29, 2012 
physics
An experiment makes use of a water manometer attached to a flask. Initially the two columns in the gas manometer are at the same level and the air pressure in the flask and both sides of manometr is 1 atm. The experiment is set up when the air pressure is
asked on March 23, 2012 
plzz help physics
An experiment makes use of a water manometer attached to a flask. Initially the two columns in the gas manometer are at the same level and the air pressure in the flask and both sides of manometr is 1 atm. The experiment is set up when the air pressure is
asked on March 29, 2012 
Calculus
Find arc length of y=logx from x=1 to x=2. dy/dx)^2=1/x^2 arc length=Int of [sqrt(1+1/x^2)]dx =Int of [sqrt(1+x^2)/x^2] =Int of [sqrt(1+x^2)]/x from x=1 to x=2. How to proceed further to integrate?
asked on September 12, 2013 
MATHS
Find arc length of y=logx from x=1 to x=2. dy/dx)^2=1/x^2 arc length=Int of [sqrt(1+1/x^2)]dx =Int of [sqrt(1+x^2)/x^2] =Int of [sqrt(1+x^2)]/x from x=1 to x=2. How to proceed further to integrate?
asked on September 11, 2013 
Calculus
Book works out integral of sqtr(a^2x^2)dx as a^2/2*arcsin(x/a)+x/2*sqrt(a^2x^2) by taking x=a sin theta, and advises to work it out using x=a cos theta. I did and got the first term as a^2/2*arccos(x/a)and the same second term. This means arcsin
asked on October 3, 2013 
Calculus
I have done Int(1/ax)dx=1/a*Int(1/x)dx =[(log x)/a] + C. The working in the book is Int(1/ax)dx=1/a*Int(a/ax)dx =[(log ax)/a]+C. Which one is correct and where is the error in my working, if so?
asked on September 20, 2013 
Maths
Eq of curve is y=b sin^2(pi.x/a). Find mean value for part of curve where x lies between b and a. I have gone thus far y=b[1cos(2pi x/a)/2]/2 Integral y from a to b=b/2(ba)ab/4pi[sin(2pi b/a)sin2pi) MV=b/2[ab sin(2pi b/a)]/(ba) Ans given is b/a. I
asked on September 4, 2013 
bcc
One canned juice drink is 30% orange juice, another is 10% orange juice. How many liters of each should be mixed together in order to get 20L that is 18% orange juice?
asked on November 23, 2011 
Calculus
Find the area cut off by x=4 from the hyperbola x^2/9y^2/4=1. Answer is 4.982 in the book. I have proceeded as under: Y=2/3*sqrt(x^29) and rhe reqd. area is double of integral 2/3*sqrt(x^29) from 3 to 4. Int= 2/3*[xsqrt(x^29)/2 –
asked on March 28, 2014 
Calculus
Following 2 questions are from a book at a point where L’Hopital’s Rule, Squeeze Theorem etc. have not been discussed and limits (A) and (B) as given below are to be evaluated by simple methods like algebraic simplification etc. 1. Int. of (xlogx)dx
asked on March 13, 2014 
Calculus
Following 2 questions are from a book at a point where L’Hopital’s Rule, Squeeze Theorem etc. have not been discussed and limits (A) and (B) as given below are to be evaluated by simple methods like algebraic simplification etc. 1. Int. of (xlogx)dx
asked on March 12, 2014 
Calculus
Integral of dx/{(x+1)sqrt(x^2+4x+2)} is given as arcsinh{(x+2)/(xsqrt3)}, but I am not getting it.? The hint given is 'Put 1/(x+1)=t' Using it, the expression reduces to Int. 1/sqrt(1+2tt^2). How to proceed further to get the desired result?
asked on February 19, 2014 
Calculus
Integrate x dx/(1x). I have proceeded thus Int xdx/(1x)=int (x1+1)/(x1) =Int[1+ 1/(x1)]dx =Int dxInt dx/(x1) =xlog(x1). On differentiating, we get original expression d/dx[xlog(x1)]=11/(x1)=x/(x1)=x/(1x). However, the answer in the
asked on January 8, 2014 
Calculus
S=Integral xdx/sqrt(x1). I have proceeded thus Put sqrt(x1)=u then x=u^2+1 and dx/sqrt(x1)=2du. S=(u^2+1)2du/u =(2u+2/u)du=u^2+2 log u +C =(x1)+ 2 log sqrt(x1)=(x1)+log(x1)+C Required answer is 2/3*(x+2)sqrt(x1)+C Have I proceeded correctly and if
asked on November 27, 2013 
chemistry
a solution has gluten concentration of 2000ug/mL at 150uL. if 2uLof that solution is taken out what is the quantity of gluten in ppm?
asked on March 22, 2012

setswana
This is a lost cause! These people who post in Setswana (Lesotho) never reply. Ever.
posted on May 8, 2019 
Art
Yes, a vase.
posted on May 6, 2019 
Science
Yes, B.
posted on May 4, 2019 
HELP ASAP PLEASE!!!
You should try reading everything shmoop has about this book. You will understand it better. www.shmoop.com/walktwomoons
posted on May 4, 2019 
Social Studies
Yes, B and C.
posted on May 2, 2019 
English
That’s WAY too long for a thesis statement. And adding to it won’t help! Statement = one sentence. Start with “dance and movement both ... “ and put everything before that inside the paper where it fits.
posted on May 1, 2019 
social studies
This is Writeacher — on my iPad, not on my computer! I agree with your answer.
posted on April 29, 2019 
government
I agree with choosing A. The First Amendment is first for a reason!
posted on April 28, 2019 
English
Boy howdy! You need to study all these terms at chompchomp.com/terms Then try again.
posted on April 26, 2019 
Science
I guess the writers of that test never lived in the West!!
posted on April 25, 2019 
English
See Similar Questions and their replies below.
posted on April 24, 2019 
language art
See Similar questions and the replies below.
posted on April 23, 2019 
history
Read through Similar Questions below and their answers to see various questions and replies along these lines. Let us know what you decide.
posted on April 23, 2019 
Englis
Needs clarification and completion.
posted on April 18, 2019 
English
Someone here MIGHT check what YOU THINK if you post your thoughts.
posted on April 18, 2019 
art and music
You will need to depend on your text for this one.
posted on April 14, 2019 
art and music
You will need to depend on your text for this one.
posted on April 14, 2019 
art and music
You’ll have to depend on what’s in your text. Interpreting art is very individual, and I don’t believe there’s only one way. Each person reacts differently.
posted on April 14, 2019 
art and music
All of the above!
posted on April 14, 2019 
English
Do you understand why no one has responded? What poem? What child?
posted on April 8, 2019 
English
No, not here.
posted on April 5, 2019 
English language
It seems he doesn’t understand the directions or sets of words any more than I do!
posted on March 30, 2019 
Career guidance
Go to www.google.co.za and search for “careers math business”
posted on March 28, 2019 
history
Just Google “Operation torch” and you’ll find out quickly.
posted on March 26, 2019 
Government
Look for maps with countries’ boundaries inside continents, or states/provinces inside countries, or counties inside a state. Another way is to use google to search for this: U. S. House districts in ________ (Enter a state's name in the blank.)
posted on March 25, 2019 
English
Please read and reread what you posted. Do you understand why no one except you can answer these questions?
posted on March 20, 2019 
career
shortage  not enough to go around surplus  more than enough to go around
posted on March 14, 2019 
World studies
See Similar Questions below.
posted on March 13, 2019 
English
Yes. A is the only one with a pronoun serving as the subject.
posted on March 12, 2019 
Civic education
See Similar Questions below.
posted on March 12, 2019 
Health records
A is correct.
posted on March 10, 2019 
social studies
Which of those choices has anything to do with art?
posted on March 5, 2019 
Concerned
Anyone who goes on public websites like Jiskha should not expect privacy! If you don’t want the admins to learn info about you, don’t use the website!
posted on March 5, 2019 
English
2 is correct, yes.
posted on March 1, 2019 
English
16 are fine. 7 is not.
posted on March 1, 2019 
Ancient Greece, please help! 💝
Ms. Sue is right. None of these answer choices is very good. The only one that comes close is B  and that weakness led to Philip of Macedon's ability to start conquering areas and his son Alexander (the Great) to expand on his father's empire. You should
posted on February 19, 2019 
English
Remove the word "that" and all will be OK.
posted on January 22, 2019 
tech and ela GACA
What’s GACA? 2 of your answers are right
posted on January 21, 2019 
English
I’d go with your first choice.
posted on January 18, 2019 
Technology
No. That’s 2 wrong guesses. Please don’t post about this question again.
posted on January 14, 2019 
Technology
No. Please check your text or look up the term at webopedia (.) com
posted on January 14, 2019 
Technology
Then check out the Ed tech post earlier today. Bobpursley’s reply is there.
posted on January 14, 2019 
Technology
See Similar Questions below.
posted on January 14, 2019 
English
Right
posted on January 14, 2019 
English
Have you written your outline yet? Have you written the rough draft of the body of your paper yet? If you haven’t, do those first. You can’t properly introduce something you haven’t written yet. Google ‘how to write an essay’ and then read and
posted on January 11, 2019 
Technology
uniform resource locator It’s the formal term for ‘web addresses.’
posted on January 11, 2019 
Social Studies
What countries are considered in southwest Asia? Southeast Asia is a term that’s long been in usage, but southwest ... ?
posted on January 9, 2019 
Literature
Yes. The word “like” tells you it’s a simile.
posted on January 4, 2019 
History  reposted for Jonah
What chart?
posted on December 28, 2018 
English
You might also put your essay through www grammarly com and see what they say.
posted on December 18, 2018 
Social studies
Wasn’t he the first president? What would a first one do?
posted on December 14, 2018 
English
I’d give it no point.
posted on December 10, 2018 
English
All are grammatically correct, but #1 is not used for the same purpose as #2 and #3.
posted on December 10, 2018 
Spanish
Jiskha has no expert in upper levels of Spanish at present. Sorry.
posted on December 10, 2018 
Social Studies
Southwest where? Northwest where? When?
posted on December 7, 2018 
English
Why did you post all this again? Go back and read school lover’s reply earlier. He/She’s right.
posted on December 7, 2018 
Social Studies
aka Writeacher — Go back and read and reread your text. Augustus was the Roman emperor after Julius Caesar. You should also look up the definition of ‘emperor.’
posted on December 7, 2018 
Social Studies
Read and study about Greek mythology. Then read and study about Aristotle. What conclusions can you draw?
posted on November 30, 2018 
social studies
The question says, “in Europe.” Which two countries are in Europe?
posted on November 30, 2018 
Spanish
Go to Google. Type in conjugate ser Spanish (Or whatever you need). Read, study, memorize. Continue ...
posted on November 28, 2018 
English
B is correct.
posted on November 27, 2018 
art
When and where was it painted? What was society like when the painter painted it? In other words, what was the background of the painter and his/her times? Look up the word ‘context’ on Google for more ideas.
posted on November 15, 2018 
english
Be sure to read your paper out loud to someone who has a printout of your paper. Find and fix any runons and fragments. Then run it through www . grammarly . com
posted on November 12, 2018 
English
The quotation marks are used correctly, but no comma is needed in that sentence.
posted on November 10, 2018