Sunday

November 23, 2014

November 23, 2014

Total # Posts: 3,784

**CHEM EASY**

Which indicator is best suited to determine the equivalence point of a titration of diethlyamine with HBr? pKb of diethylamine=3.16 A) phenolpthalein pKHIN ~9 B) bromo blue pKHIN ~4 C) alizarin yellow pKHIN~11 D) methyl violet pKHIN~ 1 E) phenol red pKHIN ~ 7.5 ?
*January 29, 2011*

**Physics**

I dont really know what the refractive index is or the Total Internal Reflection, i jst know Snell's law
*January 25, 2011*

**Physics**

that link just tells you that question is missing, but it doesnt help answer it
*January 25, 2011*

**Physics**

A light ray of wavelength 610 nm is incident at an angle θ on the top surface of a block of polystyrene surrounded by water. Find the maximum value of θ for which the refracted ray will undergo total internal re- ﬂection at the left vertical face of the block...
*January 25, 2011*

**computer**

criteria used by organizations to choose among prgramming languages
*January 19, 2011*

**computer**

what fundamental rights of the individual have computer privacy laws tried to protect
*January 19, 2011*

**computer**

For askink which printer you shold use when printing a document, which type of dialog box would be most approprate and why?
*January 18, 2011*

**computer**

name and describe five criteria that are used by organizations to choose among programming languages.
*January 18, 2011*

**computer**

when hardware or software doesn't funtion properly, what are some activities to help identify common problems
*January 18, 2011*

**Science**

How do you calculate the total magnification of a microscope, using the eyepiece magnification and the objective magnification?
*January 17, 2011*

**Physics**

a person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the board by the post ...
*January 17, 2011*

**Math**

well first, you set up a poportion 63 over 32,= x over 81. cross multiply 32*x is 32x cross multiply 63 * 81=5,103. 5,103/32x is 159.46...hope this helps..
*January 17, 2011*

**Pre-Calculus**

For what values of x is it true that |sin(x)-x| < 0.01?
*January 17, 2011*

**Social Studies**

how are blogs similar and different from journalism?
*January 16, 2011*

**german**

Oh wow. How long have you been taking German as a class? You just need to study. Even watch a German movie that has English subtitles and pay close attention. Write down vocabulary from your textbook and take notes if you have a class and Google "How to learn German,"...
*January 16, 2011*

**Physics**

Tyler is standing at the 10-yard line waiting to catch the initial kick-off. The .75 kg football experiences a change in velocity of 12 m/s in .17 s when caught by Tyler. What force does Tyler apply on the football?
*January 16, 2011*

**Physics**

A 3 kg cart is moving along when it strikes a 2 kg cart (initially at rest). The velocity of the two-cart combination after the collision is 4 m/s. Calculate the velocity of the 3 kg cart before the collision.
*January 16, 2011*

**Physics**

Joe is sledding down a snow hill when he collides with Mike half way down the hill. Joe and the sled have a mass of 65 kg and their velocity before the collision was 12 m/s. If Mike has a mass of 55 kg, what velocity would Joe, Mike, and the sled have after the collision?
*January 16, 2011*

**History**

What do you think about what I wrote? Please give me feedback! And what grade would you give it? (This homework question was removed due to a copyright claim submitted by K12 Inc.) My answer: The biggest art movement that came out of World War One was the Dada movement. The ...
*January 14, 2011*

**World History**

Thank you so much! I wrote my paragraph and it was easy thanks to you! :D
*January 14, 2011*

**World History**

I needed someone to explain to me your answer to my question so I can write a paragraph on it. Please don't give me a Wikipedia link, I need someone to actually explain this to me without just saying, "go here". I really appreciate you going through to the work ...
*January 14, 2011*

**World History**

Explain how totalitarian rulers were able to acquire power during the 1930s. Describe at least two specific totalitarian leaders, the conditions in their countries that played a part in their rise to power, and the way they used those conditions to gain power.
*January 14, 2011*

**acounting**

TEST XQ's Software Development Division (SDD) has developed several architectural design software packages. One software package that they have developed is being sold to English Company for $250,000 or 325,000 pounds. The cost of developing the software was $195,000. As ...
*January 14, 2011*

**Health**

is it bad to do the same kind of sit ups every night?
*January 13, 2011*

**Physics**

Actually 100 years is a century
*January 12, 2011*

**Advanced Functions**

he value of a new car depreciates at a rate of 12% per year. Write an equation to represent the approximate value of a car purchased for $23 000. Determine the value of the car two years after it is purchased. Approximately how many years will it take until the car is worth $...
*January 12, 2011*

**Physics**

A frictionless roller coaster is given an ini- andros (saa2652) – Energy II – dewey – (339113) 2 tial velocity of v0 at height h = 13 m . The radius of curvature of the track at point A is R = 39 m.
*January 10, 2011*

**social studies **

What are the failures of the UN organization -World meteoroligcal organization(WMO)
*January 9, 2011*

**Physics**

I got it the answer is 9.5 cm underwater
*December 16, 2010*

**Physics**

One cm of a 10-cm-long rod is made of metal, and the rest is wood. The metal has a density of 5000 kg/m3 and the wood has a density of 500 kg/m3. When the rod is set into pure water, the metal part points downward. How much of the rod is underwater?
*December 16, 2010*

**algebra**

Simplify: (3x^0 y^-4)(2x^2 y)^3 I got 24x^6 / y am I right?
*December 14, 2010*

**algebra **

okay thanks :)
*December 14, 2010*

**algebra **

simplify (5x-4)^2 I got 25x^2 -16 is that right?
*December 14, 2010*

**Pre-Calculus**

or maybe the answer is: y=2xy but that's kind of weird
*December 13, 2010*

**Pre-Calculus**

translate this polar equation into a rectangular form: rsin(2theta)=sin(theta) My answer: r2sin(theta)cos(theta)=sin(theta) 2rcos(theta)=1 2x=1 x=1/2 This is the only answer I can get and someone told me it's wrong. Would someone please help me with this
*December 13, 2010*

**com**

Write three sentence using plurals correctly and three sentences using possessives correctly on the topic of how to store personal financial information effectively and efficiently.
*December 11, 2010*

**Ms. Sue**

Thanks
*December 11, 2010*

**Ms. Sue**

Ms. Sue could I please recieve ur help on my homework. I have to do a presentation and Its a media project which I have to represent, its on the Freedom Writers- the book, and two media clips. The media clips are Hannas suitcase and Paperclips. I also got a quote as well which...
*December 11, 2010*

**circle geometry triangles**

Jacob drew the scalene triangle shown. What must he know to correctly draw this triangle?
*December 11, 2010*

**can you please check my answers**

I'm working on this for my current studies and found these answers from the first 2 chapters and some research online. 1) C 2) B 3) D 4) A 5) 6) A 7) A 8) 9) D 10) 11) 12) A 13) C 14-18) 19) C 20) B The reason I say D for 3 is because it says right in my text that the ...
*December 11, 2010*

**College Physics**

Four masses are positioned at the corners of a rectangle, as indicated in the figure below (not to scale). x 1kg------2kg | | | |y 3kg------4kg (a)Find the MAGNITUDE and DIRECTION of the net force acting on the 2.0 kg mass if x = 0.20 m and y = 0.11 m. (b)How do your answers ...
*December 10, 2010*

**Pre Calc**

f(x,y)=ln(5x^2-7y^3) Find ALL 2nd derivatives. fxx,fxy,fyx,fyy
*December 10, 2010*

**social studies**

no problem!
*December 10, 2010*

**social studies**

okay thanks I found it, it's C.
*December 10, 2010*

**social studies**

Between 1850 and 1950 the productivity of the average American farm worker: A. declined B. remained about the same C. doubled D. quadrupled I'm unsure which choice to choose? helpp
*December 10, 2010*

**Physics - Mechanics and Ocsillatory Motion**

Suppose that each of the three masses in the figure below has a mass of 5.05 kg, a radius of 0.0679 m, and are separated by a distance of 9.9 m. If the balls are released from rest, what speed will they have when they collide at the center of the triangle? Ignore gravitational...
*December 9, 2010*

**Spanish**

i have that i want to be a cook, and i have that i like to work in a kitchen and that i love to prepare meals. and i said im creaitve and artistic and a good cook. but i dont know what else to say because our teacher said it has to be really long
*December 7, 2010*

**Spanish**

you are preparing for a job interview for your dream profession. the job application asks you to write a paragraph eh espanol discussing the following things. please explain why you are interested in this profession, what activities will you do on a daily basis having this ...
*December 7, 2010*

**7th grade**

how do you convert 35ibs per minutes to ibs per hour?
*December 6, 2010*

**6th grade**

what is 30 1/4-29 1/3
*December 6, 2010*

**Chemistry**

Thank you for the help
*December 6, 2010*

**Chemistry**

Diethyl ether has a boiling point of 34.5C, and 1-butanol has a boiling point of 117C. Both of these compounds have the same numbers and types of atoms. Explain the difference in their boiling points. The answer I found was that: only 1-butanol can form hydrogen bonds. But I ...
*December 6, 2010*

**Chemistry**

Thank you. That helped a lot.
*December 6, 2010*

**Chemistry**

Which of the following gases would you keep in an outdoor storage tank in winter? Explain why. methane(CH4), Propane(C3H8), or butane(C4H10)
*December 6, 2010*

**Math**

a 52g. weight tied to a spring stretches the spring 1.3cm. How many grams would it take to stretch the spring 3cm?
*December 5, 2010*

**Math**

A public opinion poll found that 5 out of 8 people in a community wanted a exercise course. if there are 10,000 people in a community, how many do NOT want a exercise course?
*December 5, 2010*

**sociology**

I have the same question, going to Rasmussen College in St. Cloud, MN and I am confused as hell. How did you all do on your assignment??
*December 3, 2010*

**Chemistry**

An aqueous solution of H2SO4 is 60.0 % H2SO4 by mass. The density of the solution is 0.968 g/mL . I need to find the Molality, mole fraction, and Molarity.
*December 3, 2010*

**Chemistry**

I think I got the answer. Molar Mass = 119 g/mol Molecular formula is the same = C6H5P
*December 3, 2010*

**Chemistry**

A solution of 2.50 g of a compound having the empirical formula C6H5P in 25.0 g of benzene(C6H6) is observed to freeze at 4.3 degrees C. Calculate the molar mass of the solute and its molecular formula.
*December 3, 2010*

**algebra**

Solve for x: (-1/3)(-4+3x)=1/2
*December 2, 2010*

**Chemistry**

The solubility of CO2 in water at 25 degrees C and 1 atm is 0.034 mol/L. What is its solubility under atmospheric conditions? (The partial pressure of CO2 in air is 0.0003 atm.) Assume that CO2 obeys Henry's law. My Answer: 1.02 x 10^-5 mol/L
*December 2, 2010*

**math**

1 ft = 1/3 yd 7 yd - 3 1/3 yd = 3 2/3 yd or = 11/3 yd or = 3.67 yd
*December 2, 2010*

**Chemistry**

I think I got the answer. Can some please check it. Molarity = 17.3 mol/L = 17.3 M Molality = 25.1 mol/kg = 25.1 m
*December 2, 2010*

**Chemistry**

Calculate the molarity and the molality of an NH3 solution made up of 30 g of NH3 in 70 g of water. The density of the solution is 0.982 g/ml. Molar Mass of NH3 = 17.04 g
*December 2, 2010*

**algebra**

Need second method
*December 1, 2010*

**US history**

What propelled Grant to Presidential victory in the 1868 election?
*December 1, 2010*

**child care**

1.When properly executed, the behavior management strategy known as time-out becomes(a) A. a positive reinforcer. B. more effective than logical consequences. C. a conversation between child and adult. D. suitable punishment for misbehavior. 2. Which of the following ...
*December 1, 2010*

**stats**

You are given the following information obtained from a random sample of 4 observations. 25 47 32 56 At a .05 level of significance, determine whether or not the mean of the population from which this sample was taken is significantly different from 48. (Assume the population ...
*December 1, 2010*

**College Physics**

Rather than rotate completely horizontally, a carousel rotates at an angle of 10° from horizontal, with a constant angular velocity of 1.571 RAD/s. A box is placed 1.5 m from the axis of rotation. What’s the minimum coefficient of static friction so the box will not ...
*December 1, 2010*

**Physics**

Rather than rotate completely horizontally, a carousel rotates at an angle of 10° from horizontal, with a constant angular velocity of 1.571 RAD/s. A box is placed 1.5 m from the axis of rotation. What’s the minimum coefficient of static friction so the box will not ...
*December 1, 2010*

**math**

$5.33
*November 30, 2010*

**child care**

is a social group consisting of people who are equal in such respects as age, education or social class
*November 30, 2010*

**child care**

iam not sure
*November 30, 2010*

**child care**

the question i think is a
*November 30, 2010*

**child care**

i dont really understand this
*November 30, 2010*

**child care**

one of the most important functions of a childs peer group is a. serving as a replacement for the parents. b.providing opprtunities for competition. c. fostering love and understanding. d. teaching about the world outside the family.
*November 30, 2010*

**childcare**

when working with special needs/learning disabled children,caregivers should a.provide positive role models for them. b. ignore their disabilities. c. try to do as much as possible for them. d. instruct other children to disregard them. i think is a
*November 30, 2010*

**childcare**

an appropriate science activity for an infant would be: a. weighing and measuring other infants. b. planting a flower. c.feeling different textured objects. d.caring for pets of the facility.
*November 30, 2010*

**child care**

i think is c?
*November 30, 2010*

**child care**

a. be directed to lower age-level activities b. have little interaction with others. c. be directed to appropriate age-level and developmental activities. d, have stricter discipline.
*November 30, 2010*

**child care**

children with special needs should
*November 30, 2010*

**child care**

the goal of thomas behavior appears to be
*November 30, 2010*

**Calculus**

The amount A in grams of radioactive plutonium remaining in a 20-gram sample after t days is given by the formula A=20*(1/2)^(t/140). At what rate is the plutonium decaying when t=2 days?
*November 30, 2010*

**algebra 2 multiple choice HELP**

ahh thanks!
*November 30, 2010*

**algebra 2 multiple choice HELP**

or C?
*November 30, 2010*

**algebra 2 multiple choice HELP**

I'm not sure, A??
*November 30, 2010*

**algebra 2 multiple choice HELP**

find f(a), if f(t) = 2t2(squared)-t-2 A. 2(a+t)2(squared)-2t+1-2 B. 2(t+a)2(squared)-2(t+a)-2 C. 2a2(squared)-a-2 D. 4a2(squared)-2a-2 I put (squared) because the two in front of it means it's being squared... please help. thanks!
*November 30, 2010*

**algebra 2**

thanks
*November 29, 2010*

**algebra 2**

anyonee??
*November 29, 2010*

**algebra 2**

solve the inequality: 3|m-4|>6 A. [m|2<m<6] B. [m|<2 or m>6] C. [m|m<1 or m>7] D. all real numbers
*November 29, 2010*

**algebra 2**

okay thanks!!
*November 29, 2010*

**algebra 2**

solve the inequality: -2<4z+10≤12
*November 29, 2010*

**algebra**

Solve the inequality : -3(r-11)+15≥9 a. [r|r≤13] b. [r|r≥13] C. [r|r≤-13] D. [r|r≥-13]
*November 29, 2010*

**algebra 2**

woww..
*November 29, 2010*

**algebra 2**

Solve the inequality : -3(r-11)+15≥9
*November 29, 2010*

**Physics**

and what about the spring scale? is it apparent weight = actual weight - densitywater*g*V ?
*November 28, 2010*

**Physics**

A beaker of mass 1.2 kg containing 2.1 kg of water rests on a scale. A 2.2 kg block of aluminum (of density 2700 kg/m3) suspended from a spring scale is submerged in the water. Find the reading of the upper scale (the spring scale). The acceleration of gravity is 9.81 m/s2 . ...
*November 28, 2010*

**geometry**

Two chords intersect a circle. The shorter chord is divided into segments of lengths of 9 inches and 12 inches. The longer chord has a length of 24 inches. Find the length of the shorter portion of the longer chord .
*November 24, 2010*

**history**

1. Free elections in Poland: A. were not very significant B. demonstrated clearly that the Cold War was ending. C. showed that Solidarity was not really all that influential and that people would not turn their back on Communist government. D. were rigged as demonstrated by ...
*November 24, 2010*

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