Thursday
July 24, 2014

Posts by belinda


Total # Posts: 82

physics
work done by man: 4h*1/5w=work work done on crate: h*w=work w&h = 1 man = 4*.2 = 0.8 crate = 1*1 = 1 So is it D?

physics
A worker in a warehouse uses a rope passing through some pulleys to lift a heavy crate. The worker exerts a force five times less than the weight of the crate but has to move the rope four times as far as the crate moves. This situation... A) can happen because the extra dista...

Statistics
What percentage of cats sleep less than 10 hours? What percentage sleep more than 20 hours

Statistics
the average numbers of hours a cat sleep is approximately normally distributed with a mean of 15 hours and a standard deviation of 1.7 hours; what percentage of cats sleep between 13 and 18 hours

accounting
Cartwright inc has $1,000,000 of 10% bonds outstanding on December 31, 20x8. On January 1, 20x9 adams corp and 80% owned subsidiary of Cartright, inc purchases a $250,000 part of cartwrights inc's outstanding bonds in the market for $245,000. Interest accured by 12/31/20x9...

financial analysis
A zero coupon bond with a par value of 1,000 has 15 years to maturity. If the YTM is 6.2% what is the current price of this bond?

Business
The free shipping and manufacturer’s warranty that comes with a coffee maker represent which category of purchase criteria among the Four Utilities of Customer Value? Form Ease of possession Time Place

Business
9. Which of the following trends is causing marketers to place more emphasis on competitive differentiation? (C) A. Investment costs that are accrued during the Introduction phase. B.Increasing speed with which products are brought to market. C.Subsequent waves of buyers gener...

Chemistry College
If KHP sample 1 requires 22.47 mL of aqueous NaOH, how many milliliters of NaOH should be needed for samples 2 and 3?

math
number sense does the expression d-12 have a greater value when d=42 or when d=46

math
number sense does the expression d-12 have a greater value when d=42 or when d=46

English 125 Introduction to literature
What does the term literature mean to you? What makes something literary in your own mind? If literature means different things to different people, who defines what is and what is not literature? 2.What kind of reading engages/interests you? What about that writing draws you ...

math
2150

Cubic Equations
Thanks so much :D

Cubic Equations
I have three that I need help with if possible. 1. Solve 2x^3 - 3x^2 = 6x - 9 2. Find all real and imaginary roots of the polynomial equation 3x^4 - x^3 + 4x^2 - 2x - 4=0 3. Find a cubic equation with integral coefficients and roots 3i and -5.

Physics
If a 1.00 kg body has an acceleration of 3.69 m/s2 at 75° to the positive direction of the x axis, then what are (a) the x component and (b) the y component of the net force on it, and (c) what is the net force in unit-vector notation? If f = ma can f = 2, am I on the righ...

Physics - acceleration..need to find velocity
I am given two points on an acceleration vs time graph: (-2,13),(4,0). When t = -2s, v = 10 m\s. What velocity at t = 6s? I believe acceleration average is (-13/6), but how do I solve the rest get the correct answer, which is 44.7 m/s? Any help or hints would be greatly apprec...

Physics
I am given two points on an acceleration vs time graph: (-2,13),(4,0). When t = -2s, v = 10 m\s. What velocity at t = 6s? I believe acceleration average is (-13/6), but how do I solve the rest get the correct answer, which is 44.7 m/s? Any help or hints would be greatly apprec...

Physics-Help please...
The graph give the acceleration a versus time t for a particle moving along an x axis. The a axis scale set by a=12 m/s^2. At t = -2s the particle's velocity is 10 m/s. What is its velocity at t = 6s. I know that I am supposed to used integrals to solve, but I can't fi...

calculus
If an equation of motion of a particle is given by s(t)= Acos(ùt + ä), the particle is said to undergo simple harmonic motion. Find the velocity of the particle at time t. When is the velocity 0?

algebra
Here is my question. How do you solve th substitution method in this problem? 9x - y = 40 y = 4x

computers
can you please help me with compare and contrast Lans, Wans, Cans,Mans, Hans

history of design
discuss the whatham paper project

Statistics
If the mean of a set of data is 20.00 and 12.20 has a z-score of -1.30, then the standard deviation must be: What formula would you use to determine this?

Statistics
For a set of data with mean 12 and variance 9, approsimately 68% of the values will fall between 6 to 18. Is the true or false and how do you find the answere?

u s history
what factors led to western expansion at the the? what other factors contributed to the expansion? how has the notion of Manfiest Destiny shaped the world today?

Statistics
One of my classmates ask this question and it wasn't answered so now I am asking it and of course we are all struggling with no strong Math background Case 6.4 Maternal Serum Screening Test for Down syndrome Please keep in mind that I do not have a Math back ground so this...

chemistry
what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)

chemistry
what is the molality of a 0.068M solution of ethyl alcohol in water at 25 degrees celsius. (assume the density of the solution at such a low concentration is equal to that of water at 25degrees celsius, 0.997g/ml)

English
What is the importance of feedback in communication?Explain.

math 117
Thank you for helping me with this problem. Math has always been a hard subject for me. No matter how hard I study I can not get it to stick with me. Do you have any suggestions on how I can learn this math 117? None of it makes sense to me, I just can't get it!

English
should i talk about the relevance

English
Write an essay on university education in a paragraph.

medical coding 1
If you get your answers off of this site or others like this double check your work. Just because they are on here does not always make them correct. I wanted to do a little reasearch on an assignment I had and came across this site I started double checking my answeres becaus...

math
factor 3m^2n + 2m

mth
you must have been reading my problem wrong though...? I'm saying 2 to the -2 power

mth
already tried that. google calc. isn't always necessarily correct...but thanks for the attempt!

mth
(2)^-2 ?

The Digestive System
Trace the path of food from ingestion to defecation and describe what happen at each stop? Also name enzymes.

Chemistry
But then copper and tin can also be used to plate iron even if they're less reactive than iron.

Chemistry
Zinc coats Iron and prevents it from rusting. However Iron cannot be used to coat zinc and prevent it from corroding.Explain this phenomenon.HELP PLEASE URGENT!!

Chemistry
The water would change to ice. This is because bond breaking energy is higher than bond making energy hence more heat would escape from the water. Therefore temperature would drop and water would change to ice and consequently increase in volume.

Chemistry
what is H2C2O4

Research Project on Computer Confidentiality
I am working on the same project and I know your frustrations. I have been to the libraries in two diffrent counties and two college book stores along with Barnes and Nobles with no luck on any refrence guides. I took the advice from the person abouve and started thinking outs...

Reseach paper
I too am doing the same paper through Penn Foster. I found the information on the ama web site just dosen't seem to be enough information to make a long enough paragraph and I can not find any help at my local libraries or online. I found a good book but it is things from ...

Ethics
What forms of testing do sociologist utilize to measure prejudice?

calculus
what is the integral of (x^2-x+6)/(x^3-3x)? the process involves partial fractions, and the answer is supposed to include ln and arctan... i just dont know how to get there.

calculus
what is the integral of x^2-x+6/x^3-3x? the process involves partial fractions, and the answer is supposed to include ln and arctan... i just dont know how to get there.

math
whats the integral of e^(3sqrt(x))? i think i'm supposed to use substitution but i dont know what to substirute, i tried u= x^(1/3) but it didnt work out, please help!

math
In a large population of adults, the mean IQ is 112 with a standard deviation of 20. Suppose 200 adults are randomly selected for a market research campaign. The probability that the sample mean IQ is greater than 110 is...?

math
so my final answer would be 1/3 right? it seems too simple to be true...

math
Suppose you are going to roll a die 60 times and record the proportion of times that a 1 or 2 is showing, s. The sampling distribution of s should be centered about....?

astronomy
Why is the sky blue?

english
Born in Manila, Salonga began performing at age seven.

math
-12-(-17)/ -23-(-23)

Child safety- car seat question
To function properly,children's safety seats and restraints must: 1. be installed correctly and anchored to the vehicle. 2. face the back of the seat. 3. come with a lap belt and shoulder harness. Would number 1 be the best answer? My text says: "Safety seats and rest...

Poem Help Needed
This is a poem by John Berryman that I am supposed to analyze and I am completely confused by. If anyone has any observations or ideas about the main idea of the poem, PLEASE help me out! "The Traveller" They pointed me out on the highway, and they said 'That man...

US History
Why did the National Labor Union collapse? Please don't give me links - I've looked everywhere, including Wikipedia. I just don't understand what actually caused it to collapse so I'm looking for an answer. I'm trying to connect it to the collapse of the Kn...

Chemistry - Rate Law
The following example is given in my textbook: If a chemical equation is: NO2 (g) + CO (g) -> NO (g) + CO2 (g) The rate law is: Rate = k[NO2]^2 Usually you put in the reactants in their own sets of brackets, so why isn't the reactant CO involved in the rate law? I get i...

AP US History
Was the War of 1812 defensive or aggressive on America's part? I feel like it was aggressive because we attacked first, but maybe it was defensive because we were defending ourselves against impressment. Someone please clarify this for me, thanks. You're right! :-) Bot...

AP US History
What was Thomas Jefferson's party called against Hamilton's Federalist party? Check this site for your answer. http://www.pbs.org/wgbh/amex/duel/peopleevents/pande05.html

To Jasmine20 - FOILing
Try this website to learn about FOILing better: Go to Google and type in "FOIL" Click the first option (it starts with algebra.help........) If you can't find the exact website, just look through Google to find a lesson on FOILing. I think that one should try to ...

AP US History DBQ Question
For my midterm I was given a list of DBQ topics that she will pick from to give to us. I wrote the question below and I don't have the documents yet, but I have a general outline and I'm hoping people on this site can give me opinions and some more substance to my idea...

AP US History
Is a DBQ supposed to be a generic 5-paragraph essay or is it a certain length??? A DBQ is a question based upon facts presented in a document. For most purposes, it can be any length. But the generic 5-paragraph essay is a standard. Check this site for more information. http:/...

Math , correction
correct Write the equation of the line passing through each of the given pairs of points. Write your result in slope-intercept form, where possible. (2,-3) and (2,4) this is what i did for it. m= (4-(-3))/(2-2)=(7)/(0)= slope is undefined which means that the line is vertical ...

New AP Chem Question for Dr. Bob
This is a Hess' Law problem. I think I got it but I'm hoping you could check it for me: Calculate the heat of reaction for changing 1 mol of silica, SiO2, that has been extracted from sand into the pure silicon that is needed to make computer chips. Use the following d...

AP Chem - to Dr. Bob
I don't understand how to even start this problem: A mixture of H2(g), O2(g), and 2 mL of H2O is present in a 0.5 L rigid container at 25 degrees Celsius. The number of moles of H2 and the number of moles of O2 are equal. The total pressure is 1146 mmHg. Vapor pressure of ...

AP Chem - to Dr. Bob
I don't understand how to even start this problem: A mixture of H2(g), O2(g), and 2 mL of H2O is present in a 0.5 L rigid container at 25 degrees Celsius. The number of moles of H2 and the number of moles of O2 are equal. The total pressure is 1146 mmHg. Vapor pressure of ...

AP Chem
When NH3 gas is introduced at one end of a long tube while HCl gas is introduced simultaneously at the other end, a ring of white ammonium chloride is observed to form in the tube after a few minutes. This ring is closer to the HCl end of the tube than the NH3 end. Why? I am c...

AP Chem
When a gas filled balloon is cooled, it shrinks in volume; this occurs no matter what gas is originally placed in the balloon. Why? I was thinking maybe because the number of collisions are less and so the slower moving particles aren't hitting the walls and stretching the...

AP Chem
What is the STP for temperature? Is it 25 degrees Celsius? DO you go to Gateway High? me? no. why? STP is 1 atmosphere for pressure and 0 Kelvin (273o C).

Pre-Calc
Does y=1/x have an inverse? It is a one-to-one function, so it should be the inverse equation is the same??? yes, the inverse is the same. Check it with G(f(x)) So, when drawing the inverse, it is just the same graph?

Discipline
Carl is getting tired of two children in his three-year-old room having wetting accidents on the playground. The class always uses the restroom before they go outside,but two of the boys are wetting themselves at least once a week,making Carl have to send them inside for clean...

Discipline
I have a couple of questions that I need some help with. 1.Miss Wiggs is trying to read a story about elephants before her first grade class leaves that morning for a trip to the local zoo.The children have already sat through calendar and weather time,as well as a sharing tim...

Discipline
Kyle, a two-and-a-half- year old, is stacking blocks in the block center. Karen is playing beside him with some large cars. As their teacher Melanie watches, Karen rolls her car into Kyle's tower causing it to fall. Kyle hits Karen causing her to cry. Kyle's behavior i...

computer
I need to do the degrees celcuis and fahrenheit abreviations on my computer document, can someone tell me what keys to use. oC & oF. Do you want to post them on this board or is this a document you are writing. If the latter, what program are you using. If microsoft Word I may...

Chemistry - Van't Hoff Factor
How does the van't hoff factor relate to freezing points? If one van't hoff factor is bigger than another, is its freezing point lower or greater? delta Tf = iKfm. So increasing i will increase delta Tf Van't Hoff factor is the concentration of particles in a solut...

English
In Nathaniel Hawthorne's "Dr. Heidegger's Experiment", I was asked to figure out how Hawthorne feels about transcendentalism. We determined that Dr. Heidegger represents Ralph Waldo Emerson, a transcendentalist. However, I can't decide if Hawthorne though...

US History
How did the Kansas-Nebraska Act indirectly wreck the Compromise of 1850? This site will explain that conflict. http://www.infoplease.com/ce6/history/A0827030.html

Chemistry - solubility
Arrange the following compounds in order of increasing solubility in water: * O2 * LiCl * Br2 * CH3OH Like dissolves like; that is, polar compounds usually are soluble in water and non-polar compounds are not soluble in water. From that description, make your choices and post ...

US History
Is anyone on here in AP US History? Ask your question, state your thinking on it. Yes is the answer to your question. What were the Lincoln-Douglass debates? Check this site for information bout these debates. http://www.nps.gov/archive/liho/debates.htm

William Lloyd Garrison
How was William Lloyd Garrison a "pacifist" and also burned the Constitution, etc.? He seems pretty violent and liberal, not pacifistic, but the textbook calls him one. http://en.wikipedia.org/wiki/William_Lloyd_Garrison

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