Sunday

April 19, 2015

April 19, 2015

Total # Posts: 687

**chemistry**

hi, need help.. use the atomic weight of carbon and chlorine to determine the theoretical value of the molecular weight of CH3OH(I've calculate the average mr of CH3OH -->0.39g/mol).(atomic weight: c= 12.0, cl= 35.5)
*April 12, 2015*

**Physical science**

which liquid evaporates fastest between water , ethanol , nail polish remover and methylated spirits
*March 25, 2015*

**math**

The equation of a certain line, when written in general form, is 5x+3y+7=0 . The slope of the line is m , the y-intercept of the line is b , and x-interept of the line is x1 . what is the Value of m*b*x1 ?
*March 24, 2015*

**math - URGENT**

How to get -79 ?
*March 21, 2015*

**math - URGENT**

I'm don't understanding how to solve this question: The graph of a line passes through the x-intercept of y-20=2/11(x-31) and is perpendicular to the line y=1/7x+7 . The equation of the line, written in Slope-Point form, is y-p = m(x-q). what is the value of m*q ?
*March 21, 2015*

**MATH!!!**

What is the equation for the line that passes through W(-10,-9) and is parallel to y=5/32x-10 ? Thank you....
*March 21, 2015*

**math**

ABC is a triangle inscribed in a circle centre O..angle ACB =40¡ã and line And =xcm.calculate the radius of the circle.
*January 8, 2015*

**chemistry**

87
*November 27, 2014*

**chemistry**

A sample of gas in a balloon has an initial temperature of 9.0∘C and a volume of 1.75×103L . If the temperature changes to 80.∘C , and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?
*November 27, 2014*

**Maths**

Yes looking for answer to this.
*August 20, 2014*

**physics **

an object is 25 cm from a concave mirror whose focal length is 50 cm where will the image be located how wil lthe solution be ?
*July 13, 2014*

**college physics 2**

steel train rails are placed end to end with space in between on a day where a temperature is 30 degrees. How much stress will be build if the temperature is increase to 150 degrees .assume that the original is 1.5m
*July 7, 2014*

**Math **

Find the intersection of two lines. i have the answer just please tell me how it was made 4x-3y-4=0 , 4x+2y+5=0 -5y/-5 = 9/-5 y= 9/5 4x-3(-9/5)-4=0 5(4x+27/5-4=0) 20x+27-20=0 20x+7=0 20x/20=-7/20 x=-7/20 (-7/20, -9/5
*July 1, 2014*

**physics**

what air speed and heading would enable a plane to travel [NE] with a ground speed of 275 km/h if there is a wind blowing at 55 km/h from the south?
*June 19, 2014*

**math**

a pottery maker can make 24 vases in 8 days. If the pottery maker works 6 hours each day, how long does it take to make 1 vase. A 2 hours B 3hr C 4hrs D 6 hours
*April 22, 2014*

**History**

Our water is actually meteoroids that hit Earth a long time ago.
*April 7, 2014*

**History**

How did we get water on earth?
*April 7, 2014*

**art**

Who made the painting "Weeping Woman"?
*April 7, 2014*

**Statistics**

In an experiment, you measure the popularity of two brands of soft drinks (factor A), and for each brand you test males and females (factor B). The following table shows the main effect and cell means from the study: Factor A Level A1: Level A2: Brand X Brand Y Level B1: 14 23...
*March 10, 2014*

**Statistics**

A researcher investigated the effect of volume of background noise on participants’accuracy rates while performing a difficult task. He tested three groups of randomly selected students and obtained the following means and sums of squares: Volume Source Sum of sqs. df ...
*March 10, 2014*

**Statistics**

Help please... What are some reason for conducting an experiment with two factors?
*March 7, 2014*

**science**

find the empirical formula for a compound that consists of aluminum and chlorine in which the aluminum is 20.2% by mass
*March 7, 2014*

**statistics**

Conduct an ANOVA comparing participants recall will vary as a function of stress levels. Conduct an ANOVA comparing participants recall at Time 1 across all three stress level conditions (low, medium,and high). Conduct post hoc tests if needed, using the Tukey method.
*March 3, 2014*

**statistics**

Conduct an ANOVA comparing participants recall will vary as a function of stress levels. Conduct an ANOVA comparing participants recall at Time 1 across all three stress level conditions (low, medium, and high). Coduct post hoc tests if needed, using the Tukey method.Write a ...
*March 3, 2014*

**Math**

A company will make a cereal box with whole number dimensions and the volume of 100 cm³. If cardboard cost five cents per 100 cm² what is the least cost to make 100 boxes?
*February 25, 2014*

**statistics**

Determining whether an individual's political affliation affects his or her overall satisfaction with the economy. For this assignment, use only subjects that declared themselves as Republicans or Democrats and leave out any subjects who declared themselves as Independent ...
*February 25, 2014*

**Chemistry**

Assign oxidation numbers to each individual element in the following reaction and identify the oxidizing and reducing agents. 2 Zn S + 3 O2 -> 2 S O2 + 2 Zn O Ox#: Zn=+2 S=-2 O=-2 -> S=+2 O=-2 Zn=+2 O=2 Is that correct? I'm not sure how to identify the oxidizing and ...
*February 20, 2014*

**statistics**

Suppose you have information that the average stress score of students in online activities is 13.15. Using Minitab, compute a one sample t-test to find out whether the stress scores reported by your sample are significantly different from those of the population of online ...
*February 19, 2014*

**statistics**

Suppose you have information that the average stress score of students in online universities is 13.15. The scores are 16, 20, 15, 12, and 14
*February 18, 2014*

**Coordinate geometry **

Our lesson coordinate geom already now analytic proof . HOW TO DO ANALYTIC PROOF ? PLEASE PLEASE HELP THANKS VERY MUCH
*February 5, 2014*

**CHEMISTRY**

HELP MY REPORT IS ABOUT SATURATED ND UNSATURATED SOLUTIONS
*February 3, 2014*

**Psychology (statistics)**

Assume that the data in question 25 reflect a highly skewed interval variable. (a) What statistics would you compute to summarize these conditions? (b) We compute them to be 14, 12, and 8.5, respectively. What conclusion about the study should you draw? (c) What conclusion ...
*February 2, 2014*

**Psychology (statistics)**

In an English class last semester, Foofy earned a 76 1X 5 85, SX 5 10). Her friend, Bubbles, in a different class, earned a 60 1X 5 50, SX 5 4). Should Foofy be bragging about how much better she did? Why?
*February 2, 2014*

**Psychology **

For an IQ test, we know the population _ 5 100 and the _X 5 16. We are interested in creating the sampling distribution when N 5 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ means and the mean of the distribution...
*February 2, 2014*

**Statistics**

Assume that the data in question 25 reflect a highly skewed interval variable. (a) What statistics would you compute to summarize these conditions? (b) We compute them to be 14, 12, and 8.5, respectively. What conclusion about the study should you draw? (c) What conclusion ...
*February 2, 2014*

**Statistics **

In a normal distribution of scores, four participants obtained the following deviation scores: 11, 22, 15, and 210. (a) Which score reflects the highest raw score? (b) Which score reflects the lowest raw score? (c) Rank-order the deviation scores in terms of their frequency, ...
*February 2, 2014*

**PSY**

For the data in question 13, find the raw scores that correspond to the following: (a) z 5 11.22; (b) z 5 20.48.
*February 2, 2014*

**PSY**

In an English class last semester, Foofy earned a 76 1X 5 85, SX 5 10). Her friend, Bubbles, in a different class, earned a 60 1X 5 50, SX 5 4). Should Foofy be bragging about how much better she did? Why?
*February 2, 2014*

**PSY**

For an IQ test, we know the population _ 5 100 and the _X 5 16. We are interested in creating the sampling distribution when N 5 64. (a) What does that sampling distribution of means show? (b) What is the shape of the distribution of IQ means and the mean of the distribution...
*February 2, 2014*

**Course Help meeee**

Hi if im going to take pre med courses to become a pediatrician .., am i going to take it all or just one ??? plleasseeee answer meeee
*February 2, 2014*

**COURSE HELP MEEE**

Hi i want to be a pediatrician when i grw up so what course should i take in college ? im already in 3rd yr high school... in the philippines , as for me , i surpassed the k12 before they implement it and the next yr we our batch will be the lasy 4th yr hgh school students to ...
*February 1, 2014*

**COURSE HELP PLEASE ms sue qq**

What course should i really take if i want to be a pediatrician ? COURSE HELP PLEASE - Ms. Sue, Friday, January 31, 2014 at 11:47am You should take all of the hardest courses offered, especially in math and sciences. ================ HI what are those ? really all ? not just ...
*February 1, 2014*

**COURSE HELP PLEASE**

What course should i really take if i want to be a pediatrician ?
*January 31, 2014*

**GEOMETRY MIDPOINT FORMULA steve how did this hapn**

If a line is extended from A (2,3) through B ( -2, 0 ) to a point so that AC = 4ab Find the coordinates of C Please help thanks so much GEOMETRY MIDPOINT FORMULA - Steve, Thursday, January 30, 2014 at 11:58am B-A = (-4,-3) C-A = 4(B-A) = (-16,-12) C = A+(C-A) = (-14,-9)
*January 31, 2014*

**GEOMETRY MIDPOINT FORMULA **

If a line is extended from A (2,3) through B ( -2, 0 ) to a point so that AC = 4ab Find the coordinates of C Please help thanks so much
*January 30, 2014*

**Chemistry Combined Gas Law**

Hi so im reviewing or our long test tomorrow on combined gas law and gay lussac's well here, combined gas law i find it (maybe ) confusing to do this one, because theres no right answers because it is a practice exercise.. what i know on combined gas law is that pressure ...
*January 28, 2014*

**please help**

What is a simpler form of the expression. -3(-y-2)+5y
*January 10, 2014*

**US GOV**

True or false 1)few issues capture the attention of all Americans. 2)Most issues are of little interest to the majority. 1)FALSE 2)FALSE
*December 17, 2013*

**To reiny**

hi do you have a facebook account ?
*December 10, 2013*

**math**

A garden will be made up of a parallelogram, a rectangle and a triangle. The garden must have an area of 500m 2 . Draw two possible gardens. Determine the dimensions of each part of the garden, and justify your choice of these dimensions
*December 9, 2013*

**English**

Those are the words I'm supposed to put in the diagram
*November 29, 2013*

**English**

What kind of sentences are they and how do I diagram them? Large brains "do" not necessarily "confer" superior intelligence. I ordered materials to use in the craft school "from a supplier" in Minnesota. "This done," I outlined lesson ...
*November 29, 2013*

**Algebra (Verbal Expressions- More Difficult)**

The sum of 6.5 times u, 5 and -2. plus the product of 3.5 and x is equal to the result of adding x, 4.5 times y and -10. The sum of x and y plus the result of adding z and 8.5 equals 2 times x plus -3 times y plus the result of multiplying 5 by u plus -7.. The result of adding...
*November 23, 2013*

**Algebra**

The product of 2 and y plus the result of multiplying z by 2 plus x equals 3.
*November 23, 2013*

**Algebra**

The product of x and 3 plus the product of 7 and y plus z times 4 is equal to 3.
*November 23, 2013*

**Algebra**

The result of multiplying 2 by x plus y times 3 plus 5 times z is equal to 10.
*November 23, 2013*

**Physics (Please Help)**

Problem 4.4- Suppose n o and n e are given. In (a) you only need to find the magnitude of the group velocity. Problem #2 in HW 10 may be helpful. You can also directly use the definition of group velocity, i.e., v g = triangle k w (k), taking into account the equation of the ...
*November 13, 2013*

**Physics (Please Help)**

At the He-Ne laser wavelength (L= 632.8 nm) the refractive indices of crystal quartz are n o = 1.54264 and n e = 1.55171 calculated from its Sellmeier equation. The laser is incident from the air onto the surface of crystal quartz at an angle of incidence of 45 degrees. For ...
*November 13, 2013*

**spelling words**

Here is the correct spelling of the words (Punctuation, Spelling, and Grammar) Travon to the following of what you posted above: Hello! My name is Travon. I need help on making my spelling words into two sentences. For example, a sentence I need to write is, "I see the ...
*November 12, 2013*

**Advanced MicroEconomics**

Construct a short-run supply function for a firm whose short-run cost function is C= = 0.04q^3 – 0.8q^2 +10q+5 3. The long run cost function for each firm is C = q^3 – 4q^2 + 8q. Find the industry’s long run supply curve. If the market demand curve is is D = 200...
*November 12, 2013*

**Advanced MicroEconomics**

In a competitive market, there are two groups of firms. For every firm in group A, the long-run ATC curve is U-shaped and intersects the long-run MC curve when ATC = 20 and output is 4. There is an unlimited number of firms in group A. Every firm in group B has a special ...
*November 12, 2013*

**Advanced MicroEconomics**

In a competitive market, there are two groups of firms. For every firm in group A, the long-run ATC curve is U-shaped and intersects the long-run MC curve when ATC = 20 and output is 4. There is an unlimited number of firms in group A. Every firm in group B has a special ...
*November 12, 2013*

**Partial Differential Equations**

Problem 4.4- Suppose n o and n e are given. In (a) you only need to find the magnitude of the group velocity. Problem #2 in HW 10 may be helpful. You can also directly use the definition of group velocity, i.e., v g = triangle k w (k), taking into account the equation of the ...
*November 12, 2013*

**Partial Differential Equations**

At the He-Ne laser wavelength (L= 632.8 nm) the refractive indices of crystal quartz are n o = 1.54264 and n e = 1.55171 calculated from its Sellmeier equation. The laser is incident from the air onto the surface of crystal quartz at an angle of incidence of 45 degrees. For ...
*November 12, 2013*

**Philosophy**

I need help with this proof for my philosophy class. This proof is supposed to be done via indirect proof or conditional proof, so it is supposed to use AIP and IP or ACP and CP to derive the conclusion! This is an assignment that is submitted through Aplia, so I need it to be...
*November 11, 2013*

**Philosophy**

I need help with this proof for my philosophy class. This proof is supposed to be done via conditional proof, so it is supposed to use ACP and CP to derive the conclusion! This is an assignment that is submitted through Aplia, so I need it to be precise and the assignment is ...
*November 11, 2013*

**Philosophy**

I need help with this proof for my philosophy class. This proof is supposed to be done via indirect proof or conditional proof, so it is supposed to use AIP and IP or ACP and CP to derive the conclusion! This is an assignment that is submitted through Aplia, so I need it to be...
*November 11, 2013*

**Philosophy**

I need help with this proof for my philosophy class. This proof is supposed to be done via indirect proof or conditional proof, so it is supposed to use AIP and IP or ACP and CP to derive the conclusion! This is an assignment that is submitted through Aplia, so I need it to be...
*November 11, 2013*

**Physics (Please Help)**

d1 = 2.53 cm +/- .05 cm d2 = 1.753 m +/- .001 m 0 = 23.5 degrees +/- .5 degrees v1 = 1.55 m/s +/- .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. Z = 4d1 (cos (0))^ 2
*November 11, 2013*

**Physics (Please Help)**

d1 = 2.53 cm +/- .05 cm d2 = 1.753 m +/- .001 m 0 = 23.5 degrees +/- .5 degrees v1 = 1.55 m/s +/- .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. d1 (tan (0))
*November 11, 2013*

**Physics**

d1 = 2.53 cm +/- .05 cm d2 = 1.753 m +/- .001 m 0 = 23.5 degrees +/- .5 degrees v1 = 1.55 m/s +/- .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. a = 4 v1^2 / d2
*November 11, 2013*

**Physics**

d1 = 2.53 cm +/- .05 cm d2 = 1.753 m +/- .001 m 0 = 23.5 degrees +/- .5 degrees v1 = 1.55 m/s +/- .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. Z = 4d1 (cos (0))^ 2
*November 11, 2013*

**Physics**

d1 = 2.53 cm +/- .05 cm d2 = 1.753 m +/- .001 m 0 = 23.5 degrees +/- .5 degrees v1 = 1.55 m/s +/- .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. d1 (tan (0))
*November 11, 2013*

**Physics**

d1 = 2.53 cm +/- .05 cm d2 = 1.753 m +/- .001 m 0 = 23.5 degrees +/- .5 degrees v1 = 1.55 m/s +/- .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. a = 4 v1^2 / d2
*November 11, 2013*

**Physics**

d1 = 2.53 cm +/- .05 cm d2 = 1.753 m +/- .001 m 0 = 23.5 degrees +/- .5 degrees v1 = 1.55 m/s +/- .15 m/s Using the measured quantities above, calculate the following. Express the uncertainty calculated value. 1. d3 = 4 (d1 + d2)
*November 11, 2013*

**Accounting**

Genentech, Inc. is a California-based biotech pioneer recently acquired by Swiss pharmaceutical giant Roche Holding AG. Roche paid $46.8 billion in cash for the 44 percent of Genentech it did not already own, implying a market value of over $100 billion for the entire company...
*November 2, 2013*

**Accounting**

Montana Company produces basketballs. It incurred the following costs during the year. Direct materials: $14,032 Direct Labor: $25,706 Fixed manufacturing overhead: $9,698 Variable manufacturing overhead: $32,164 Selling Costs: $21,176 What are the total product costs for the ...
*November 1, 2013*

**Algebra 2**

Make up an equation that satisfies the given conditions: must have x-intercepts at (1,0) and (2,0). It must also have a y-intercept at (0,4). How do you factor the y-intercept?
*October 28, 2013*

**Algebra 2**

These 3 equations all describe the same quadratic function. What are the coordinates of the following points on the graph of the function? From which equation is each point most easily determined? y = (x - 5) (x + 1) y = x^2 - 4x - 5 y = (x - 2) ^2 - 9 X-intercept, what are ...
*October 28, 2013*

**Chemistry**

A 23.16 ml volume of an H2A acid solution of unknown concentration with 2 drops of phenolphthalein required 14.24 ml of 0.135 M NaOH to reach the endpoint. What is the molar concentration of the acid solution?
*October 24, 2013*

**Chemistry**

Which of the following compounds is neutral in aqueous solution? A. CaCl2 B. AlCl3 C. NH4Cl D. CaO E. Na2CO3 F. CO2
*October 24, 2013*

**Pre-Calculus**

Find the value of the parameter: x = 3t y = t^2 + 5 t = 2
*October 20, 2013*

**College Algebra**

Find the standard form of the equation of the parabola with the given characteristics and vertex at the origin. Passes through the point (-5, 1/8); vertical axis. There is no focus of the parabola or equation given, so how am I suppose to solve this problem?
*October 14, 2013*

**College Algebra**

Find the standard form of the equation of the parabola with the given characteristics and vertex at the origin. Passes through the point (-1, 1/8); vertical axis. There is no focus of the parabola or equation given, so how am I suppose to solve this problem?
*October 14, 2013*

**Econometrics**

Do Hobbits gain or lose if the price of a sword goes up to $150? (To answer the question, calculate their real wages before and after the price change).
*October 4, 2013*

**Econometrics**

Because of the War of the Ring, the price of a sword went up to $150. Calculate new wage and employment level in each sector.
*October 4, 2013*

**Econometrics**

If the price of 1 pound of cereals is $10 and the price of a sword is $100, what is the wage rate paid to Hobbits in the Shire? How many Hobbits work in the cereal sector? In sword sector?
*October 4, 2013*

**Material Science**

Explain how the five labeled ocean gyres in Fig. 6.38 arise from the atmospheric general circulation, being explicit about vertical atmospheric circulation cells and surface pressure centers.
*October 4, 2013*

**Material Science**

Show a calculation supporting the value of Ra = -100 W/m2 on the bottom of page 11 in the notes. Hint, consider Figure 4.13 being mindful of units.
*October 4, 2013*

**Material Science**

On the bottom of page 11 in the notes, ΔFa is positive in the tropics and negative near the poles. State what this means physically in terms of energy transport, and explain why these oppositely-signed results occur in terms of the other quantities in the atmospheric ...
*October 4, 2013*

**Material Science**

Explain the direction of the six surface wind belts in Fig. 6.24C. Be sure to use the concept of pressure gradient force and the Coriolis effect in your answer.
*October 4, 2013*

**Economics**

This problem is based on the specific factors model. Consider the economy of the Shire that produces cereals and swords. Each industry employs Hobbits, but land is specific to the production of cereals, and metal is a specific factor in the sword industry. The amounts of land...
*October 3, 2013*

**Economics**

Suppose that there are 1,000 hot-pretzel stands operating in Toronto. Each stand has the usual U-shaped average total cost curve. Both the market demand curve and the supply curve for pretzels are linear, and the market for pretzels is in long-run competitive equilibrium. a) ...
*September 27, 2013*

**Economics**

Much of the demand for U.S. agricultural output has come from other countries. In 1998, the total demand for wheat was Q = 3244 – 283 P. Of this, total domestic demand was QD = 1700 – 107 P, and domestic supply was QS = 1944 + 207 P. Suppose the export demand (the ...
*September 27, 2013*

**Mathematics**

Anna burned 15 calories per minute running for x minutes and 10 calories per minute hiking for y minutes. She spent a total of 60 minutes running and hiking and burned 700 calories. The system of equations shown below can be used to determine how much time Anna spent on each ...
*September 24, 2013*

**Economics**

What prediction is shared by the neutrality of money and the natural rate hypothesis (NRH)?
*September 24, 2013*

**Math (College Level Mathematics)**

Fourier sin series for f(x) = 1, 0 < x < Pie is given by 1 = 4/n E 1/ (2n-1) times sin (2n-1) x, (0 < x < n). Using this, find the Fourier sinc series for f(x)= 1, on 0 < x < c where c > 0. Then find the Fourier series for g(x), x > 0 where g(x) = 1, 0...
*September 21, 2013*

**Math (College Level Mathematics)**

Fourier cosine series correspondence for f(x)= x, o < x < pie given by x ~ pie / 2 - 4/n, E infinity on top and n=1 on bottom. cos (an-1)/x / (2n-1)squared, (0 < x < Pie). Explain why this correspondence is actually an equality for 0 is less than or equal to x and...
*September 21, 2013*

** Math (College Level Mathematics)**

Let c > 0 be a constant. For F E Cp (-C, C), the Bessel inequality is ao squared/ 2 + N E n = 1 (an squared + bn squared) is less than or equal to 1/C { c on top, c on bottom [ f (x)] squared of x, N = 1, 2, ... Where an and bn are the Fourier coefficients for f (x), -c <...
*September 20, 2013*

**Math (Geometry)**

Find the length of the third side of a triangle if the area of the triangle is 18 and two of its sides have lengths of 5 and 10.
*September 20, 2013*