# ms

Popular questions and responses by ms
1. ## 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

2. ## 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(2pi-0)=4a*pi Book shows 2a*pi. Am I wrong somewhere?

3. ## 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?

4. ## 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.

5. ## 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)cosx-sinx.sec^2 x}/(1+tanx)^2=0……..(A) Or cosx+sinx=sinx.sec^2 x or cosx= sinx.sec^2-sinx

6. ## Calculus

Integrate x dx/(1-x). I have proceeded thus- Int xdx/(1-x)=int -(x-1+1)/(x-1) =-Int[1+ 1/(x-1)]dx =-Int dx-Int dx/(x-1) =-x-log(x-1). On differentiating, we get original expression- d/dx[-x-log(x-1)]=-1-1/(x-1)=-x/(x-1)=x/(1-x). However, the answer in the

7. ## Calculus

s=çdx/(4+5cos x). By using t-substitution, i.e. t=tan(x/2) we get cos x=(1-t^2)/(1+t^2) and dx=2dt/(1+t^2). Substituting in s and simplifying, we get s= 2çdt/4(1+t^2)+5(1-t^2)=2çdt/(9-t^2). Using standard result çdx/(a^2-x^2)=1/a*arctanh (x/a)

8. ## Calculus

Book works out integral of sqtr(a^2-x^2)dx as a^2/2*arcsin(x/a)+x/2*sqrt(a^2-x^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

9. ## 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[1-cos(2pi x/a)/2]/2 Integral y from a to b=b/2(b-a)-ab/4pi[sin(2pi b/a)-sin2pi) MV=b/2-[ab sin(2pi b/a)]/(b-a) Ans given is b/a. I

10. ## 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?

11. ## 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

12. ## 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

13. ## 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?

14. ## English

What is the order of adjective in a sentence?

15. ## science

I need a reason the land forms canyons and volcanoes are similar thank you

16. ## 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

17. ## 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

18. ## 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/2-3=0 Or x^2-3x+2=0 Or (x-1)(x-2)=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

19. ## Calculus

Find the area cut off by x=4 from the hyperbola x^2/9-y^2/4=1. Answer is 4.982 in the book. I have proceeded as under: Y=2/3*sqrt(x^2-9) and rhe reqd. area is double of integral 2/3*sqrt(x^2-9) from 3 to 4. Int= 2/3*[xsqrt(x^2-9)/2 –

20. ## 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

21. ## 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

22. ## 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+2t-t^2). How to proceed further to get the desired result?

23. ## Calculus

S=Integral xdx/sqrt(x-1). I have proceeded thus- Put sqrt(x-1)=u then x=u^2+1 and dx/sqrt(x-1)=2du. S=(u^2+1)2du/u =(2u+2/u)du=u^2+2 log u +C =(x-1)+ 2 log sqrt(x-1)=(x-1)+log(x-1)+C Required answer is 2/3*(x+2)sqrt(x-1)+C Have I proceeded correctly and if

24. ## Calculus

How to integrate dx/(4-5 sin x) using t-substitution method(i.e. taking tan x/2=t)?

25. ## 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?

26. ## 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?

27. ## 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?

28. ## 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

29. ## 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

30. ## physics

A child operating a radio-controlled 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?

1. ## POLYNOMIALS

Nice

posted on March 5, 2020
2. ## Art

Yes, a vase.

posted on May 6, 2019
3. ## Science

Yes, B.

posted on May 4, 2019

posted on May 4, 2019
5. ## Social Studies

Yes, B and C.

posted on May 2, 2019
6. ## 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
7. ## social studies

posted on April 29, 2019
8. ## government

I agree with choosing A. The First Amendment is first for a reason!

posted on April 28, 2019
9. ## English

Boy howdy! You need to study all these terms at chompchomp.com/terms Then try again.

posted on April 26, 2019
10. ## Science

I guess the writers of that test never lived in the West!!

posted on April 25, 2019
11. ## English

See Similar Questions and their replies below.

posted on April 24, 2019
12. ## language art

See Similar questions and the replies below.

posted on April 23, 2019
13. ## 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
14. ## Englis

Needs clarification and completion.

posted on April 18, 2019
15. ## English

Someone here MIGHT check what YOU THINK if you post your thoughts.

posted on April 18, 2019
16. ## art and music

You will need to depend on your text for this one.

posted on April 14, 2019
17. ## art and music

You will need to depend on your text for this one.

posted on April 14, 2019
18. ## 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
19. ## art and music

All of the above!

posted on April 14, 2019
20. ## English

Do you understand why no one has responded? What poem? What child?

posted on April 8, 2019
21. ## English

No, not here.

posted on April 5, 2019
22. ## English language

It seems he doesn’t understand the directions or sets of words any more than I do!

posted on March 30, 2019
23. ## Career guidance

posted on March 28, 2019
24. ## history

Just Google “Operation torch” and you’ll find out quickly.

posted on March 26, 2019
25. ## 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
26. ## English

posted on March 20, 2019
27. ## career

shortage - not enough to go around surplus - more than enough to go around

posted on March 14, 2019
28. ## World studies

See Similar Questions below.

posted on March 13, 2019
29. ## English

Yes. A is the only one with a pronoun serving as the subject.

posted on March 12, 2019
30. ## Civic education

See Similar Questions below.

posted on March 12, 2019
31. ## Health records

A is correct.

posted on March 10, 2019
32. ## social studies

Which of those choices has anything to do with art?

posted on March 5, 2019
33. ## 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
34. ## English

2 is correct, yes.

posted on March 1, 2019
35. ## English

1-6 are fine. 7 is not.

posted on March 1, 2019

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
37. ## English

Remove the word "that" and all will be OK.

posted on January 22, 2019
38. ## tech and ela GACA

posted on January 21, 2019
39. ## English

I’d go with your first choice.

posted on January 18, 2019
40. ## Technology

posted on January 14, 2019
41. ## Technology

No. Please check your text or look up the term at webopedia (.) com

posted on January 14, 2019
42. ## Technology

Then check out the Ed tech post earlier today. Bobpursley’s reply is there.

posted on January 14, 2019
43. ## Technology

See Similar Questions below.

posted on January 14, 2019
44. ## English

Right

posted on January 14, 2019
45. ## 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
46. ## Technology

uniform resource locator It’s the formal term for ‘web addresses.’

posted on January 11, 2019
47. ## 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
48. ## Literature

Yes. The word “like” tells you it’s a simile.

posted on January 4, 2019
49. ## History - reposted for Jonah

What chart?

posted on December 28, 2018
50. ## English

You might also put your essay through www grammarly com and see what they say.

posted on December 18, 2018
51. ## Social studies

Wasn’t he the first president? What would a first one do?

posted on December 14, 2018
52. ## English

I’d give it no point.

posted on December 10, 2018
53. ## English

All are grammatically correct, but #1 is not used for the same purpose as #2 and #3.

posted on December 10, 2018
54. ## Spanish

Jiskha has no expert in upper levels of Spanish at present. Sorry.

posted on December 10, 2018
55. ## Social Studies

Southwest where? Northwest where? When?

posted on December 7, 2018
56. ## 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
57. ## 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
58. ## Social Studies

posted on November 30, 2018
59. ## social studies

The question says, “in Europe.” Which two countries are in Europe?

posted on November 30, 2018
60. ## Spanish

Go to Google. Type in conjugate ser Spanish (Or whatever you need). Read, study, memorize. Continue ...

posted on November 28, 2018
61. ## English

B is correct.

posted on November 27, 2018
62. ## 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
63. ## english

Be sure to read your paper out loud to someone who has a printout of your paper. Find and fix any run-ons and fragments. Then run it through www . grammarly . com

posted on November 12, 2018
64. ## English

The quotation marks are used correctly, but no comma is needed in that sentence.

posted on November 10, 2018