Friday

July 31, 2015

July 31, 2015

Total # Posts: 1,465

**chemistry another Q**

Which, 9-fluorenol or 9-fluorenone, would have higher Rf value on a silica gel plate with 30% acetone/70% hexane at the eluent? Explain.
*February 2, 2009*

**chemistry**

Calculate the amount (volume) of 5.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 100mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation.
*February 2, 2009*

**history**

Was Westernization the best policy for China, Japan, Egypt, and the Ottoman Empire? i don't need a direct answer, just links to websites that could help me out with this. google didn't come up with anything for me.
*January 28, 2009*

**how children learn**

according to carl jung what are the two main ways that people process information
*January 19, 2009*

**Calculus**

Got a midterm worksheet. Realized how confused I am. Here are some questions: lim x^3 + 12x^2 - 5x/5x x->0 Find the indicated limit: lim 11x/absolute value x x->0+
*January 19, 2009*

**calculus**

Consider curve given by x^2+ 4y^2= 7 + 3xy.. Three part question A) show that dy/dx = 3y-2x/8y-3x B) Show that there is a point P with x-coordinate 3 at whiich the line tangent to the curve at P is horizontal. Find the y-coordinate of P. C) find the value of d^2y/ dx^2 at the ...
*January 11, 2009*

**Calculus**

Find: 1)x^2-y^2=15, normal at (-8,7)
*January 11, 2009*

**Eth125**

What was the result of your IAT, and do you feel that the test produced valid results in your case? o In your opinion, is it difficult to accurately measure prejudice? Why or why not? o Describe other measurements sociologists use to calculate prejudice
*January 11, 2009*

**Calculus**

I rewrote the quesion y = sqrt (4 + sin 10x)
*January 8, 2009*

**Calculus**

y = sqrt (4 + sin 10x)
*January 8, 2009*

**Calculus**

More questions on - finding dy/dx 1) y = sqrt 4 + sin 10 x - I am lost again 2) y = 10/sin x answer: - 10 csc x cot x 3) y = sin x/ 8x
*January 8, 2009*

**Calculus**

Need help to find dy/dx: 1) y = (sin x) ^-1/3 answer dy/dx = - 1/ 3(sinx) ^4/3 2) y = sqrt 8 + sin(6x) answer - lost
*January 8, 2009*

**spelling**

brother is to mother like fly is to? 4 letters and must include scr spr str or thr
*January 7, 2009*

**Calculus**

Answer ? - impicit differentiation Find dy/dx & d^2y/dx^2 y^2 - x^2 = 2 is the answer dy/dx=x/y; d^2y/dx^2= y^2-x^2/y^2
*January 7, 2009*

**Calculus**

I did miss the sign but would the answer be: 7x^6 - ----- csc^2y
*January 7, 2009*

**Calculus**

Here's another one - I think that I am starting to understand it. Find dy/dx by implicit differentiation: x^7 = cot y My answer is csc^2y / 7x^6
*January 7, 2009*

**Calculus**

Thanks Remy. I have one more - 2y + 9xy-4=0 I got -9y/2 + 9x
*January 7, 2009*

**english**

Neither Shanti nor Neelima have an extra pen. I think
*January 7, 2009*

**Calculus**

I am lost. Find dy/dx by implicit differentiation. 1) 5y-2x^2=x-3
*January 7, 2009*

**PHysics**

describe briefly how a generator works. Well, I'm in the electricity unit of my course, so would this mean I have to describe how electricity's generated?
*December 28, 2008*

**english**

annagrams aeiifglnhpwystThis is an event that will never happen. However, I suppose it could on any given Saturday Night. Here are your letters, you will have 3 left over. A E I I F G L N H P W Y S T
*December 23, 2008*

**english**

solve this puzzle make two words you will have one letter left. aeeioumnrrstv
*December 18, 2008*

**physics**

In the figure below, a uniform sphere of mass m = 2.50 kg and radius r = 2.4 cm is held in place by a massless rope attached to a frictionless wall a distance L = 10.2 cm above the center of the sphere. (a) What is the tension in the rope? N (b) What is the force on the sphere...
*December 13, 2008*

**physicscalculus**

An automobile with a mass of 1310 kg has 3.10 m between the front and rear axles. Its center of gravity is located 1.78 m behind the front axle. The automobile is on level ground. (a) Determine the magnitude of the force from the ground on each front wheel (assuming equal ...
*December 13, 2008*

**english**

i have to devise a writing exercise which has to involve all children working on writing one text.so i need some ideas
*December 12, 2008*

**english**

hello:)i have to give my class a writng exercise which has to involve all children.they all have to work on writing out one and the same text?any ideas?
*December 12, 2008*

**math**

97.3 is 7% of what number?
*December 12, 2008*

**math**

roberto has 22% of his pay withheld for deductions. if he earns $680 per week, what amount is withheld?
*December 12, 2008*

**sci/275**

Raw carrot 52 calories per serving. Energy Calculator Trophic level Type of producer or consumer Total energy available from previous level (100%) Energy from total gained by consumer (10%) Energy from total lost when consumed (90%) First Primary producer 52 N/A N/A Second ...
*December 9, 2008*

**sci/275**

Identify the fruit or vegetable you selected and relate the second law of thermodynamics to the changes in energy observed in Appendix CHow did the amount of energy gained compare to the amount of energy lost as heat at the second through fourth trophic levels? Considering the...
*December 9, 2008*

**literature**

trust me i got a 85% which is a disappointment so if you want a 100% take this down 1.B 2.B 3.B 4.B 5.D 6.C 7.A 8.D 9.C 10.C 11.D 12.C 13.A 14.A 15.C 16.A 17.C 18.D 19.A 20.A
*December 9, 2008*

**math**

Ms. Jordan has been given a loan of $2,500 for 1 year. If the interest charged is $275, what is the interest rate on the loan?
*December 9, 2008*

**english**

need some help!which language learning strategies are you using when you need to solve these tasks: 1.Rewrite the sentences using adverbs I'm a terrible dancer.I dance_______ 2.Read the text and make questions and 3.Make subject and object questions So which language ...
*December 7, 2008*

**english**

yes, i will be teaching ESL classes.I'll look through this page and see what is says.:)
*December 7, 2008*

**english**

Hey everybody:) Question:How can I as a future teacher help my students to practice how to use language?
*December 7, 2008*

**deutsch**

Hallo!Versteht hier jemand deutsch?Ich muss einen Bericht schreiben.Muss ein Thema sein das etwas mit Kroatien zu tun hat.Eher was aktuelles.Wenn jemand mir Hilfe leisten kann könnte dann wäre ich sehr dankbar!
*December 1, 2008*

**government**

are third party efforts essentially a waste of time in America? who were the 4 greatest presidents and why? (did anyone know the site or where i could find the answer for this???)
*November 28, 2008*

**Niagara Falls**

So you mean the characteristics of Niagara Falls???
*November 26, 2008*

**Niagara Falls**

Well, I'm doing a project that I picked in science and one of the questions said "What are the physical features of Niagara Falls" and I don't know what that means, so please help me!!!
*November 26, 2008*

**health**

Well, you could say that how he's gonna ruin the family or what's going to happen if he drinks a lot.
*November 26, 2008*

**HS Calculus**

I have one more that I really am lost at. Question - find the points on the graph y=2x^3-3x^2-12x+20 at which the tangent is parallel to tthe x-axis. I do not even know where to begin. We were told we could use the shortcut for this one.! Thanks again
*November 25, 2008*

**HS Calculus**

Thank you . I think that I understand alittle better. It is oblivious that I do not understand this material.
*November 25, 2008*

**HS Calculus**

Definition of the derivative to calculate f'(x) if f(x) = square root 2x. Find the equation of the tangent & normal line to the graph of f at x=2. Tangent line - y=2x-x Normal line - y = 1/2x +3 I do not know whether these are the correct answers.
*November 25, 2008*

**HS Calculus**

Let f(x) = 2/3-x a) find the slope of the tangent to the graph of f at a general point x0 using the definition of the dervative. b) use the result in part a to find the slope of the tangent at x0=1. I am very confused. My answer for (a) 1/ 6-6x-x^2 (b) -1 I compared them to a ...
*November 25, 2008*

**Calculus**

what is the limit of x/(ln x) as x approaches 0?
*November 8, 2008*

**math**

235 x 0.3 = x 235 - x = the amount you have to pay
*November 6, 2008*

**HS Calculus**

1) Limit theta approaching zero sin squared theta/ tan theta 2) Lim x appraoches zero x + sin x/x x + sin x/x = x/x + sinx/x 0 + 1 =1 My answer : 1 Is this correct
*November 3, 2008*

**HS Calculus**

Help Have some more that I do not understand. Limit theta approaching zero SinTheta minus Tan theta/ sin cubed theta
*November 3, 2008*

**HS Calculus**

1) Limit theta approaching zero sin squared theta/ tan theta 2) Lim x appraoches zero x + sin x/x x + sin x/x = x/x + sinx/x 0 + 1 =1 My answer : 1 Is this correct
*November 3, 2008*

**HS Calculus**

Have some more that I do not understand. Limit theta approaching zero SinTheta minus Tan theta/ sin cubed theta
*November 3, 2008*

**Calculus**

Evaluate: Limit - Theta approaches 0 Theta /cos theta
*November 2, 2008*

**science**

What is the lock and key theory? Explain. I need to use words such as active site, substrate and catalyst Are there any diagrams of it?
*November 2, 2008*

**HS Calculus**

Sorry I posted the incorrect ? Evaluate: Theta approached zero Theta/cos theta
*November 2, 2008*

**HS Calculus**

Evaluate..........Please Help Lim Infinite -> 0 Infinite/cos infinite
*November 2, 2008*

**Math**

27 IS THE MODE WHICH IS THE # USED MOST. THERE ARE (2) OF THE FOLLOWING #'S: 20, 27, 36. IF THE MODE IS THE MOST USED #, THEN THERE SHOULD BE (3) 27. FIRST BLANK SPACE IS 27. RANGE IS THE DIFFERENCE BETWEEN THE 1ST # AND THE LAST #. FIRST # BEING 18 AND THE RANGE IS 22 SO ...
*October 27, 2008*

**calculus**

Help - I have three problems that I am stuck on - 1. Lim x approaches infinity (x-3/x squared + 4) 2. Lim x approaches 3 x cubed - x squared - 7 x +3/ x squared - 9 3. Lim x approaches negative infinity (x + square root x squared + 2x)
*October 27, 2008*

**calculus HS**

Analtical method to evaluate Lim X -> -infinite
*October 26, 2008*

**AP English Comp**

Same type of ?- Using - Notes of a Native Son by Baldwin 3. Baldwin uses many different writing techniques in the essay. Find instances of concrete description, action, reflection, and strong argumentative assertions. How do these techniques further his specific purposes.
*October 26, 2008*

**AP English Comp**

Help - Baldwin's - Notes of a Native Son - 1. What are the time periods of the essay? Baldwin does not present them chronologically; how does he connect them?
*October 26, 2008*

**Social Studies**

How did the Cherokee use the land to get food?
*October 22, 2008*

**Philosophy**

Appendix F Philosophy and Belief in God Matching Ativity
*October 20, 2008*

**college level physics**

a 40 kg skier skis down a frictionless slope angled at 10 degrees 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 is the magnitude of the skier's velocity is (a) ...
*October 19, 2008*

**Math**

Soybean meal is 12% protein, cornmeal is 6% protein. How many pounds of each should be mixed together in order to get a 240-lb mixture that is 10% protein?
*October 19, 2008*

**Math**

Solve the following system of equations. x+2y=9 (1) x=3-2y (2)
*October 19, 2008*

**NOT SURE**

can i have some facts on Barack Obama and John MaCain please
*October 17, 2008*

**Science**

Could you please explain "total internal reflection" in simple terms (suitable for a 12/13 yr old.
*October 14, 2008*

**Science**

What in total internal reflection? (diagram please)
*October 13, 2008*

**12th grade Physics**

In an experiment, a car taveling at 88m/s,west slams into a wall and comes to a halt in 0.75 seconds. What is the car's acceleration vector?
*October 7, 2008*

**chemistry**

Consider a sample containing 2.00 mol of a monatomic ideal gas that undergoes the following changes from State A to State D: State A PA=10.5atm, VA=10.00L State B PB=10.5atm, VB=5.00L State C PC=24.5atm, VC=5.00L State D PD=24.5atm, VD=22.00L Assume that the external pressure ...
*October 4, 2008*

**business**

I know they are allowed to make a profit but at the same time a place like Singapore is capitalist and pays very little tax. I assume that both choices are somewhat correct. but it's a multiple choice question and i can only choose one so i dont know which one fits more
*October 3, 2008*

**business**

which one of these are true? In a capitalist economy: a) one might a profit b) one would pay no taxes
*October 3, 2008*

**TLC error**

When a TLC plate was developed, the solvent front ren off the top of the plate. why?
*September 30, 2008*

**History**

What should never be compromised?
*September 3, 2008*

**high school algebra**

The weather during Smedley's vacation was strange -- It was cloudy on 13 different days but it was never cloudy for an entire day -- Cloudy mornings were followed by clear afternoons -- Cloudy afternoons were proceded by clear mornings ---There were 11 clear mornings and ...
*August 28, 2008*

**Math**

The weather during Smedley's vacation was strange -- It was cloudy on 13 different days but it was never cloudy for an entire day -- Cloudy mornings were followed by clear afternoons -- Cloudy afternoons were proceded by clear mornings ---There were 11 clear mornings and ...
*August 28, 2008*

**Binomial Expansion**

Thanks for the link. But what happens when there is a number in front of one of the variables, like the 2y instead of y? Thanks again.
*August 5, 2008*

**Binomial Expansion**

Write the 6th term of the expansion of (x^2-2y)^9 and simplify. Thanks!
*August 5, 2008*

**English**

very intereseting seeing the development of an answer. she is called cary in the movie not carrie
*July 16, 2008*

**Reseach paper on Opinion 5.07**

You have to start thinking beyond the question. Use your introductory setence to answer every question from the Opinion 5.07. From there begin to think of what could happen if things weren't done according to the Opinion, the legal ramifications, how some states have even ...
*June 21, 2008*

**statistics**

Commercial airliners have a maximum allowable weight of passenger checked baggage. It is known that the distribution of individual passengers checked-in baggage weight has a mean of 42 pounds and a standard deviation of 25 pounds. Suppose that a particular airplane, with a ...
*May 15, 2008*

**probability**

If 2 cards are drawn at random from a standard deck of cards with no replacement, find the probability that both cards are heart I had 13/52 multiplied by 12/51 to get an answer of 1/17 A bucket contains 4 red, 2 yellow, and 3 green balls. If one ball is taken at random what ...
*May 15, 2008*

**statistics**

Let A and B be constants such that A < B. Let z be a standard normal random variable. For what values of A does P(A<z<B)approximately equal P(z<B)? Pick ALL that apply. a. A = -9 b. A = -26 c. A = 0 d. A = 9 e. None of these are correct. This is how I'm ...
*May 10, 2008*

**Physics**

Bulb P is rated 60 W, 110 V, and bulb Q is rated 100 W, and 110 V. Which of the bulbs has the higher resistance? they have the same cannot be determined bulb P bulb Q I had they have the same.
*May 7, 2008*

**Physics**

A 120 kg football player tries to dive into the endzone at 7.5 m/s to score a touchdown. A 150 kg player dives out of the endzone into the other player at 5 m/s to try and stop him. They collide at the goalline and the tackler holds on to the player diving into the endzone. ...
*May 5, 2008*

**algebra2**

name a point that lies on the circle: (x-2)^2+(y+3)^2=16 I cannot use the points (2,1) or (6,-3) and I can't find another point that works.
*May 1, 2008*

**Science**

An airplane has to fly eastward to a destination 856 km away. If wind is blowing at 18.0 m/s northward and the air speed of the plane is 161 m/s. In what direction should the plane head to reach its destination. So I know the direction is south east but can someone give me the...
*April 30, 2008*

**Math**

Define a relation R from Z to Z by (x,y) are in the relation if and only if the absolute value of (x-y) is less than or equal to two. Is R symmetric?
*April 13, 2008*

**english: critical thinking**

Yay!! I was abit skeptical but turns out all of the answers where correct! Thanks so much guys!! 100% Hugs, Jane <3
*March 19, 2008*

**social studies**

What is the term for the process when two cultures blend forming an entirely new culture?
*March 9, 2008*

**social studies**

What group invaded the indain subcontinent from the black sea area?
*March 9, 2008*

**CALCULUS-URGENT- no one will respond!!!**

we know the series from n=0 to infinity of c(sub n)*3^n converges 1. TRUE OR FALSE the series from n=0 to infinity of c(sub n)*2^n must converge 2. TRUE OR FALSE The series from n=0 to infinity of c(sub n)*4^n must converge 3. TRUE OR FALSE the series from n=0 to infinity of c...
*March 5, 2008*

**CALCULUS-URGENT- no one will respond!!!**

find the radius and interval of convergence for the series the series from n=0 to infinity of ((-1)^n*x^n)/(n+1)
*March 5, 2008*

**CALCULUS-URGENT**

we know the series from n=0 to infinity of c(sub n)*3^n converges 1. TRUE OR FALSE the series from n=0 to infinity of c(sub n)*2^n must converge 2. TRUE OR FALSE The series from n=0 to infinity of c(sub n)*4^n must converge 3. TRUE OR FALSE the series from n=0 to infinity of c...
*March 4, 2008*

**CALCULUS-URGENT**

find the radius and interval of convergence for the series the series from n=0 to infinity of ((-1)^n*x^n)/(n+1)
*March 4, 2008*

**CALCULUS-URGENT**

find the radius and interval of convergence for the series the series from n=1 to infinity of ((-1)^(n+1)*x^n)/n! I did the ratio test so I had the Lim as n approaches infinity of -x/(n+1), but this is 0, giving no radius, so I think I did something wrong...
*March 4, 2008*

**CALCULUS**

we know the series from n=0 to infinity of c(sub n)*3^n converges 1. TRUE OR FALSE the series from n=0 to infinity of c(sub n)*2^n must converge 2. TRUE OR FALSE The series from n=0 to infinity of c(sub n)*4^n must converge 3. TRUE OR FALSE the series from n=0 to infinity of ...
*March 4, 2008*

**CALCULUS**

find the radius and interval of convergence for the series the series from n=0 to infinity of ((-1)^n*x^n)/(n+1)
*March 4, 2008*

**CALCULUS**

find the radius and interval of convergence for the series the series from n=1 to infinity of ((-1)^(n+1)*x^n)/n! I did the ratio test so I had the Lim as n approaches infinity of -x/(n+1), but this is 0, giving no radius, so I think I did something wrong...
*March 4, 2008*

**english**

Could it be... Doing right all the time will ease your conscience?
*February 18, 2008*