Sunday

August 28, 2016
Total # Posts: 3,444

**CHEMISTRY HELP**

1) The specific heat of solid copper is 0.385 J/g(C). What thermal energy change occurs when the temperature of a 34.10 g sample of copper is cooled from 35.7 degrees Celsius to 13.9 degrees Celsius? Answer: -286.3 J This amount of heat is used to melt solid ice at 0.0 degrees...
*October 17, 2011*

**Statistics**

SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points, and are approximately normally distributed. What SAT I score within the population would have a percentile rank of approximately 16?
*October 17, 2011*

**Statistics**

It says to calculate using this: Nk/100 So im not sure if i did it correctly....
*October 17, 2011*

**Statistics**

z = (68-100)/16 z = -32/16 = -2 So would it be 95%?
*October 17, 2011*

**Statistics**

Scores on the Stanford-Binet Intelligence scale have a mean of 100 and a standard deviation of 16, and are presumed to be normally distributed. A person who scores 68 on this scale has what percentile rank within the population?
*October 17, 2011*

**Statistics**

So the midrange of items purchases would be 3. 5+30+24+32+35 = 126 items were purchased by the customers in this sample. Did i do this correctly?
*October 17, 2011*

**Statistics**

A sample of purchases at the local convenience store has resulted in the following sample data, where x = the number of items purchased per customer and f = the number of customers. x 1 2 3 4 5 f 5 15 8 8 7 •What does the 15 stand for in the above table? •Find the ...
*October 17, 2011*

**Statistics**

I. dependent variable II. independent variable III. independent variable IV. dependent variable Is this correct?
*October 17, 2011*

**Statistics**

In each of the four examples listed below, one of the given variables is independent (x) and one of the given variables is dependent (y). Indicate in each case which variable is independent and which variable is dependent. I. Rainfall; Crop yield II. Taxi fare; Length of ride ...
*October 17, 2011*

**Statistics**

A student scored 81 percent on a test, and was in the 77th percentile. Explain these two numbers.
*October 17, 2011*

**Statistics**

In terms of the mean and standard deviation: -What does it mean to say that a particular value of x has a standard score of +2.1? -What does it mean to say that a particular value of x has a z-score of -2.4?
*October 17, 2011*

**Stats**

For a particular sample of 63 scores on a psychology exam, the following results were obtained. First quartile = 57 Third quartile = 87 Standard deviation = 9 Range = 51 Mean = 72 Median = 72 Mode = 98 Midrange = 57 Answer each of the following: I. What score was earned by ...
*October 17, 2011*

**math**

A 1200·kg elevator is attached to a cable whose tension is 11900·N. What is the magnitude of the elevator's acceleration? ____ m/s
*October 16, 2011*

**chemistry**

what is the typical relationship between the rate of reaction and the value of the equilibrium constant? A) it is a direct porportionality B) it is an exponential proportionality C) it is an inverse proportionality D) there is no relationship between these factors
*October 14, 2011*

**math**

A ball is thrown from the edge of a cliff with an initial velocity of 60·m/s upward. Answer the following questions using + (upward) and - (downward) to indicate the direction of the velocity. Ignore air resistance and assume the ball does not hit the ground during the ...
*October 13, 2011*

**physics**

The hang-time of a basketball player who jumps a vertical distance of 2 feet (0.61 m) is about 0.70 second. What will be the hang-time if the player reaches the same height while jumping 3 feet (0.91 m) horizontally?
*October 13, 2011*

**Stats**

A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20. I'm not sure how to do this....please help
*October 12, 2011*

**Help plz!! Math....**

Start with x = 100 and add four x values to make a sample of five data such that the standard deviation of these data equals 0
*October 12, 2011*

**Help plz!! Math....**

A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20
*October 12, 2011*

**Physics**

A 4.3-kg block slides down an inclined plane that makes an angle of 26° with the horizontal. Starting from rest, the block slides a distance of 2.1 m in 5.1 s. Find the coefficient of kinetic friction between the block and plane.
*October 12, 2011*

**sentence**

I show my appreciation to my parents for all they do for me :)
*October 12, 2011*

**4th grade math**

add all of them and divide by how many sets there are which is 5.... 92 + 96 + 99 + 103 + 88 = 478/5 = 95.6
*October 12, 2011*

**Statistics**

Start with x = 100 and add four x values to make a sample of five data such that the standard deviation of these data equals 0
*October 12, 2011*

**Statistics**

A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20
*October 12, 2011*

**Can someone help me please? MATH**

hmmmmm i guess it is....thank u :)
*October 11, 2011*

**Can someone help me please? MATH**

Identify the sampling technique used to obtain this sample: Each person boarding a plane is asked to flip a coin; those showing “tails” have their luggage searched.
*October 11, 2011*

**Math**

interesting....thank you for your example, it definitely helped me :)
*October 11, 2011*

**Math**

In your own line of work, give one example of a discrete and one example of a continuous random variable, and describe why each is continuous or discrete.
*October 11, 2011*

**Math**

Identify the sampling technique used to obtain this sample: Each person boarding a plane is asked to flip a coin; those showing “tails” have their luggage searched.
*October 11, 2011*

**Chemistry**

I have no idea where to even start with this problem on my pre-lab! For part of the experiment, you will need to prepare 100 mL of 0.025 M CH3CO2H, starting from commercial "glacial" acetic acid, which has a concentration of 17.4 M. This is best done by making two ...
*October 10, 2011*

**Math-Stats**

An insecticide company exposes 10,000 cockroaches to its newest product, and exposes another 10,000 to their previous formula. The researchers use videotape to count how many cockroaches are still alive, and how many appear to be in distress, at 10 second intervals. When the ...
*October 10, 2011*

**Math**

actually i do check and actually that is another problem i posted, not this damn problem!
*October 10, 2011*

**Math**

Construct a grouped frequency distribution for the following 28 scores using a class width of 4: 64 63 58 46 52 62 47 49 56 47 43 41 45 51 60 62 51 61 50 55 56 53 54 58 48 48 58 46 How do I do this?
*October 10, 2011*

**Math**

A candidate for a political office claims that he will win the election. A poll is conducted, and 35 of 150 voters indicate that they will vote for the candidate, 100 voters indicate that they will vote for his opponent, and 15 voters are undecided. a. What is the population ...
*October 10, 2011*

**Chemistry**

Regular-strength chlorine bleach is a 5.25% solution of NaClO. how many milliliters of 0.02005 M sodium thiosulfate will be required to reach the equivalence point in the titration of a 1.000ml sample of Bleach by reacting the ClO- ions with I, then titrating the resulting I2 ...
*October 10, 2011*

**Math...PLEASE HELP!!!!**

A candidate for a political office claims that he will win the election. A poll is conducted, and 35 of 150 voters indicate that they will vote for the candidate, 100 voters indicate that they will vote for his opponent, and 15 voters are undecided. a. What is the population ...
*October 9, 2011*

**Math**

how in the world do i do this??
*October 9, 2011*

**Math**

Construct a grouped frequency distribution for the following 28 scores using a class width of 4: 64 63 58 46 52 62 47 49 56 47 43 41 45 51 60 62 51 61 50 55 56 53 54 58 48 48 58 46
*October 9, 2011*

**Math**

A candidate for a political office claims that he will win the election. A poll is conducted, and 35 of 150 voters indicate that they will vote for the candidate, 100 voters indicate that they will vote for his opponent, and 15 voters are undecided. a. What is the population ...
*October 9, 2011*

**Math-Ms. Sue or Bob**

Can either one of you help me with the math problems I asked? I really need help and do not understand how I would calculate the sample statistic and parameter population....
*October 9, 2011*

**MATH**

Construct a frequency distribution table to organize the following set of data: 16 23 24 23 24 20 15 16 21 15 16 19 17 15 23 16 18 19 20 19
*October 9, 2011*

**MATH**

I get -3 for all of those??
*October 9, 2011*

**MATH**

Construct a grouped frequency distribution for the following 28 scores using a class width of 4: 64 63 58 46 52 62 47 49 56 47 43 41 45 51 60 62 51 61 50 55 56 53 54 58 48 48 58 46
*October 9, 2011*

**MATH**

would this be right? the population parameter of interest is 45%? the value of the sample statistic is 50%??
*October 9, 2011*

**MATH**

I am still so confused....the population parameter of interest isn't 150? The value of the sample statistic isn't 100? I'm sorry I am so lost with Statistics...one of the hardest classes I've dealt with yet :( Please help me...
*October 9, 2011*

**MATH**

A candidate for a political office claims that he will win the election. A poll is conducted, and 35 of 150 voters indicate that they will vote for the candidate, 100 voters indicate that they will vote for his opponent, and 15 voters are undecided. a. What is the population ...
*October 9, 2011*

**algebra 2**

i need help with these questions simplify √4x^2/y^3 √2x^4/72 √18+√32 √31(√3+√27)
*October 9, 2011*

**Math....please help**

A candidate for a political office claims that he will win the election. A poll is conducted, and 35 of 150 voters indicate that they will vote for the candidate, 100 voters indicate that they will vote for his opponent, and 15 voters are undecided. a. What is the population ...
*October 8, 2011*

**Statistics-confused**

A candidate for a political office claims that he will win the election. A poll is conducted, and 35 of 150 voters indicate that they will vote for the candidate, 100 voters indicate that they will vote for his opponent, and 15 voters are undecided. a. What is the population ...
*October 8, 2011*

**math**

$50 + $15 + $3 = $68
*October 8, 2011*

**Statistics-confused**

A candidate for a political office claims that he will win the election. A poll is conducted, and 35 of 150 voters indicate that they will vote for the candidate, 100 voters indicate that they will vote for his opponent, and 15 voters are undecided. a. What is the population ...
*October 8, 2011*

**Statistics**

I think it's nominal correct?
*October 8, 2011*

**Statistics**

Classify the following variable as nominal, ordinal, discrete, or continuous and state why it is such a variable: number of US Senators
*October 8, 2011*

**Statistics**

Thank you.
*October 8, 2011*

**Statistics**

Yes....so it would be observational correct?
*October 8, 2011*

**Statistics**

Describe whether the following study would most likely be “observational” or “experimental”, and why it would be so. * Mystery shoppers monitor the preferences at a shopping mall
*October 8, 2011*

**nursing**

What are some processes for applying nurse-sensitive performance reviews and quality indicators? How can these processes be best implemented? What is their effect on nursing research and practice?
*October 5, 2011*

**english**

can you help me classify this sentence: The two blue birds trill merrily each morning. What would (each morning) be?
*October 2, 2011*

**english**

Can you help me with this sentence The two blue birds trill merrily each morning. article adj.-the adj-two adj-blue noun-birds verb-trill adv-merrily prep-each object of prep-morning is this right?
*October 2, 2011*

**english**

prep-on article adj- the object of the prep-swings adv.-during adv- recess
*October 2, 2011*

**english**

please help classify each word in this sentence: Several children played on the swings during recess.
*October 2, 2011*

**nursing**

How would you prevent misconduct in any reserach study
*September 29, 2011*

**math**

20 cm
*September 28, 2011*

**accounting**

How do write this as a journal entry transaction? Alex transferred $17,000 from his personal bank account to the corporation in exchange for capital stock.
*September 28, 2011*

**Physics**

I know a steady force produces a steadily increasing velocity and a constant acceleration. But what happens when you increase the force by doubling or tripling it? I think the acceleration would follow force changes but what about velocity?
*September 25, 2011*

**math**

x^(2ln(x)-1) +e^1/9=(1+e^1/9) *x^(ln9x)-0.5)
*September 25, 2011*

**statistics**

12.27 A study has been carried out to compare the United Way contributions made by clerical workers from three local corporations. A sample of clerical workers has been randomly selected from each firm, and the dollar amounts of their contributions are as follows. (Use data ...
*September 24, 2011*

**Physics**

A car accelerates from 0 to 60 miles per hour in 6.5 seconds. Determine the distance traveled in this time and the acceleration. Assume constant acceleration.
*September 22, 2011*

**Science**

If a block is 12cm wide, 7cm long and 9 cm then how much of the block will be below the surfaceof the water if the block weights 500 grams?
*September 20, 2011*

**math**

six cars are parked in front of a car dealership. If you are looking at the cars from the front. the red car is parked in front of the green car. the black car is between the green and the yellow car. The blue car is parked on the right side of the red car. the orange car is ...
*September 20, 2011*

**Math**

For the limit lim x → 3 (x3 − 2x + 5) = 26 illustrate the definition by finding the largest possible values of δ that correspond to ε = 0.2 and ε = 0.1. (Round your answers to four decimal places.)
*September 19, 2011*

**Physics**

Now would that also be the same visual for an observer? Or would it seem to them like the it's curving and fall on the rider?
*September 17, 2011*

**Physics**

I have a projectile motion question. If let's say a cannon which was placed on a moving cart with negligible friction projects a cannonball straight up in the air where will it fall? Would it be behind the cannon, on the rider or fall straight down back into the cannon? ...
*September 17, 2011*

**4th grade math**

what are the 3 different ways to make the number 15, 638? with only hundreds, tens and ones?
*September 15, 2011*

**english **

identify the details in the story that contribute to a sense of reality and explain how these details make the story plausible.
*September 14, 2011*

**english**

score/ score presents a fictional world, regulated by computers and other machines in which humans are noticeably absent. Though the main characters are actually two computers that converse, the story contains several details that create verismilitude. Because computers are ...
*September 14, 2011*

**Literacy**

Please check my work. Thank you. 1. Which of the following is the most direct tool to find books owned by a library you are visiting? A. W i k i p e d i a B. Search engines like G o o g l e or Y a h o o C. Catalog D. Periodical database Answer #1 is B 2. Which of the following...
*September 12, 2011*

**Literacy**

Thank you very much.
*September 12, 2011*

**Literacy**

Question # 1. The web page showing 1,398,414 building permits for 2007, but none of the choice showing that figure.
*September 12, 2011*

**Literacy**

Please check my work. Thank you. 1. According to FedStats, what was the number of building permit in 2007? A. 61,617 B. 54,059 C. 496,686 D. 1,500,173 Answer #1 is D. 2. Which of the following is a primary source? A. Newspaper article published in the 1980s that reports on an ...
*September 12, 2011*

**math (please help me)**

How do I solve for T? PI(67.2/2)^2*T*13.6g/cm^3= 5lb*435.6g
*September 11, 2011*

**Chemistry**

In Millikan's experiment, the charge on each drop of oil was measured in coulombs. Imagine the same experiment, but with charges measured in a fictitious unit called a zeet (). Drop Charge () A 1.38×10−14 B 3.22×10−14 C 3.68×10−14 D 4.14...
*September 9, 2011*

**College Math**

5x3=15 15/52 4/52= 1/13 2/52= 1/26
*September 9, 2011*

**Literacy**

I’m confused. Are you saying that none of the choice is correct?
*September 7, 2011*

**Literacy**

I will go with “B” and get back to you when I get back the results. Thank you very much.
*September 7, 2011*

**Literacy**

Why the question mark on # 5?
*September 7, 2011*

**Literacy**

Please check my work, thank you. Question 1 – 4: Access the Library of Congress library Catalog. Then, find the information to answer the question. 1. What year was the oldest copy of Ralph Ellison’s Going to the Territory published? A. 1952 B. 1986 C. 1987 D. 1995 ...
*September 7, 2011*

**Math**

The measure of the supplement of an angle is 3 less than four times the measure ofthe comloment of the same angle
*September 6, 2011*

**AP chem**

Is it 84.8%?
*September 6, 2011*

**AP chem**

A 1.25-g sample contains some of the very reactive compound Al(C6H5)3. On treating the compound with aqueous HCl, 0.951 g of C6H6 is obtained. Al(C6H5)3(s) + 3HCl(aq) --> AlCl3(aq) + 3C6H6(l) Assuming that Al(C6H5)3 was converted completely to products, what is the weight ...
*September 6, 2011*

**AP Chemistry**

The formulas for ethanol and ammonium nitrate are C2H5OH and NH4NO3. In what respects are these formulas and compounds different? Am I supposed to say that there are different elements that make up the compounds?
*September 5, 2011*

**algebra**

The equation y=-1777x+27153 can be used to predict the number y of gun deaths in the united states x years after 2000, that is, x=0 corresponds to 2000 x=3 corresponds to 2003, x=4 corresponds to 2004, and so on. Predict the number of deaths in 2004 and 2009. In what year will...
*August 31, 2011*

**English**

Sorry Ms Sue, I would like to know if success comes form work hard or smart work? I think the statement is not actually true Sucess comes form smart work.
*August 31, 2011*

**English**

Success comes from hard work. (I will say “NO” to the statement above) Success comes from smart work.
*August 31, 2011*

**Literacy 4**

Thank u Ms Sue
*August 26, 2011*

**Literacy 4**

Please check my work. Thank you. 1. Government documents in a library are classified according to which of the following schemes? A. Superintendent of Documents B. Government Printing Office C. Dewe Decimal D. Library Of Congress Answer #1 is A 2. You're using the ...
*August 26, 2011*

**Literacy**

Thank u.
*August 24, 2011*

**Literacy**

Miss Sue please review Literacy question #2, on Aug 23, 2011 @ 6:04pm. I believed I made a mistake, the correct answer is C not B. 2. The Altas of World Religion is an example of which of the following reference sources? A. Historical atlas B. Subject-specific atlas C. General...
*August 24, 2011*

**Literacy 3**

Answer for # 8 is A Thank u Mis Sue.
*August 23, 2011*

**Literacy 3**

Please Check my work. Thank you. 6. To avoid plagiarism in you written research paper, you must provide a citation for which of the following? A. The United Nations ruling on the Soviet-bloc countries B. The date the berlin Wall was pulled down by a crowd in Germany C. ...
*August 23, 2011*