Sunday

August 2, 2015

August 2, 2015

Total # Posts: 224

**Physics**

A photon having wavelength λ scatters off a free electron at A (see figure below), producing a second photon having wavelength λ'. This photon then scatters off another free electron at B, producing a third photon having wavelength λ'' and moving in ...
*June 17, 2015*

**Math**

Determine the simple interest p=6742.75,6.05%, t=90 days
*April 25, 2015*

**Chemistry**

1. How many moles of ammonia NH3 are produced when 0.45 moles of nitrogen N2 reacts? N2 + 3H2 yields 2NH3 2. How many mililiters of water will be produced when 2.05 g of hydrogen reacts? The density of water is 1.00 g/mL ? 2H2 + O2 yields 2H2O 3. What is the limiting reactant ...
*March 18, 2015*

**math**

Rick has a collection of 6 video games. He lets his best friend borrow: of his video game collection. Write two equivalent to this number Explain how you came fractions up with the fractions.
*March 2, 2015*

**math**

Adam wants to compare the fractions 129 6 and 1. He wants to order them from least to greatest and rewrite them so they all have the same denominator. Explain how Adam can rewrite the fractions.
*March 2, 2015*

**business math**

A local Barnes and Noble paid a $79.44 net price for each calculus textbook. The publisher offered a 20% trade discount. What was the publisher’s list price?
*February 24, 2015*

**Grade 9 French **

I need help I'm trying to find a rap to help me with the present and irregular verbs
*February 9, 2015*

**health**

three information technology applications--clinical decision support systems--as components of QI management.
*January 19, 2015*

**English**

no its not A. I got it wrong.
*October 8, 2014*

**Geometry**

Given that R is between S and T, find each missing measure. RS=6, TR=4.5, TS=?
*September 8, 2014*

**math**

The least common multiple of two numbers is 60 and one of the other number is 7 less than the other number what are the numbers justify your answer
*September 3, 2014*

**History**

Ok the question was, what evidence in the declaration is there of religious faith? I put, "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty, ...
*July 23, 2014*

**History**

thanks.
*July 23, 2014*

**History**

So for my homework question it asks what reference do you see to Native Americans in the Declaration of Independence? I put: "He has excited domestic insurrections amongst us, and has endeavored to bring on the inhabitants of our frontiers, the merciless Indian Savages, ...
*July 23, 2014*

**History**

Question about Puritans behavior in Massachusetts? I was given a picture that wont let me post on here. The top picture has a cowboy boot and a book, and the second picture has a more feminine boot, with dice, a cup, etc. And have to answer: What does the labeling in the two ...
*July 16, 2014*

**Algebra**

nvm its a
*July 7, 2014*

**Algebra**

Myra uses an inverse variation function to model the data for the ordered pairs below. (2, 30), (3, 20), (4, 15), (5, 12), (6, 10) Which statement best explains whether an inverse variation function is the best model for the data? An inverse function is the best model because ...
*July 7, 2014*

**Algebra**

Jordan uses a linear equation to model the data in a table. Which reasoning might Jordan have used in the decision to model the data with a linear equation? The products of corresponding x- and y-values are equal. The ratios of consecutive y-values are equal for evenly spaced ...
*July 7, 2014*

**trig**

earth is 149 600 000 km from the sun. this distance is equal to 1 A.U (astronomical unit). Mars is seen form earth to make an angle of 68degrees with the sun. a) draw a diagram and label b)how far are earth and mars c) do you think the distance between earth and mars are the ...
*May 27, 2014*

**Math**

i don't know
*March 7, 2014*

**Physics **

A sound wave in a solid has a frequency of 15.0 kHz and a wavelength of 0.333 m. What would be the wave speed, and how much faster is this speed than the speed of sound in air?
*March 4, 2014*

**math **

on a boat tour there are half as many children there are as adults. ther are 40 people on the tour how many children are there
*March 3, 2014*

**Math**

Write an equation of a line that is parallel to the line y-3=2(x+5) and goes through the point (5,7)
*February 12, 2014*

**Math**

Three minutes after take-off, and airplane is 5,000 feet in the air. If it ascends at a constant rate, what is the rate of change? Please help.
*February 12, 2014*

**Math**

In 3 minutes I can type 192 words. and in 5 minutes I can type 311 minutes. Find how many words I can type per minute. Help please.
*February 12, 2014*

**Math**

Solve each system using the method of your choice. 1. 7x+2y=17 2. 6x-5y=-9 3. y=4x-8 4. y=2x+10 5. 3x-6y=30 6. y=-6x+34 7. 3x+y=5 8. 15x+5y=2 9. 2m=-4n-4 10. 3m+5n=-3 11. 5x+y=0 12. 5x+2y=30 Thank you. (:
*February 11, 2014*

**Chemistry**

A buffer is made from 0.20 M sodium acetate and 0.20 acetic acid. Ka=1.8 x 10^-5. The ph is
*July 10, 2013*

**Geometry 1**

find the distance between K(9,2) AND L(-3,9)to the nearest tenth
*May 20, 2013*

**chemistry**

Consider the following reaction: I2(g) + Cl2(g) 2ICl(g) o Kp = 81.9 at 25 C. Calculate ∆Grxn for the reaction at 25 C under each of the following conditions: a Standard conditions. b At equilibrium. c PICl = 2.55 atm; PI2 = 0.325 atm; PCl2 = 0.221 atm.
*April 18, 2013*

**Chemistry**

Calculate ∆Ssurr when a reaction having each of the following changes in enthalpy: a. ∆Hrxn0 = -287 kJ; 298 K. b. ∆Hrxn0 = 127 kJ; 77 K.
*April 18, 2013*

**Chemistry**

only one of each of the following pairs of reactants undergoes a reaction. Complete and balance the equation for the reaction that occurs. NaCl (aq) + BaCl2 (aq) --> Na2SO4 (aq) + BaCl2 (aq) --> NO3^- (aq) + OH^- (aq)+ Al (s) --> CO3^2- (aq) + OH^- (aq) +Al (s) -->...
*April 15, 2013*

**pre-calculas**

Find the slant asymptote, if any, of the rational function. Do not graph the function. (Enter your answers as a comma-separated list of equations. If an answer does not exist, enter DNE.) f(x) = x2 − 2x + 15 _____________ x + 7
*March 10, 2013*

**Math **

In an experiment with light, Rodney used 6 square polarized filters, 3 in. on a side. What was the total surface area of the filters? Count one face only for each filter.
*February 7, 2013*

**Physics **

Stephanie serves a volleyball from a height of 0.78 m and gives it an initial velocity of +7.7 m/s straight up. How high will the volleyball go? The acceleration of gravity is 9.81 m/s^2. How long will it take the ball to reach its maximum height?
*January 28, 2013*

**Sociology**

The text, Introduction to Sociology, describes many individuals who have contributed to our current view of sociology, including: C. Wright Mills Howard Becker W. I. Thomas Auguste Comte Emile Durkheim Herbert Spencer Karl Marx Erving Goffman’s Harriet Martineau W. E. B. ...
*January 23, 2013*

**Chemistry**

A solution of H2SO4 was electrolyzed using the inert platinum electrodes. A) Write the balanced half-reactions for the anode and cathode in this cell. B) How many coulombs passed through the cell in 90 minutes at 8.0 amperes? C) How many moles of electrons pass through the ...
*January 6, 2013*

**math **

at the beginning of the summer, conan had $180 in the bank. each week he deposits another $64 that he earns mowing lawns. is his account balance proportional to the number of week since he started mowing lawns?
*January 2, 2013*

**math **

a baseball club has 18 players for every team, with the exception of four teams that have 19 playes each. is the number of players proportional to the number of teams?
*January 2, 2013*

**Physics**

An object is placed 11 cm in front of a convex mirror of focal length 4 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.
*November 27, 2012*

**Statistics **

A major department store chain is interested in estimating the average amount its credit card customers spent on their first visit to the chain's new store in the mall. Fifteen credit card accounts were randomly sampled and analyzed with the following results: x = $50.50 ...
*November 14, 2012*

**Statistics **

When testing H0: σ12 = σ22 vs. Ha: σ12 ≠ σ22 two random samples of sizes 10 and 8, respectively, are used. The calculated value of the test statistic is found to be equal to 2.22. Which of the following statements is true? a. H0 must be rejected at &#...
*November 14, 2012*

**Statistics **

When estimating a population mean μ, where the population standard deviation σ is known, we can: a. choose a larger z value, construct a wider confidence interval, and achieve a lower confidence level b. choose a smaller z value, construct a narrower confidence ...
*November 14, 2012*

**algebra**

Use an associative expression to rewrite the expression (r+43)+s= An equilveant expression is
*November 3, 2012*

**Physics**

A fox fleeing from a hunter encounters a 0.665 m tall fence and attempts to jump it. The fox jumps with an initial velocity of 7.05 m/s at an angle of 45.0°, beginning the jump 2.17 m from the fence. By how much does the fox clear the fence? Treat the fox as a particle.
*October 27, 2012*

**Physics**

An archer wishes to shoot an arrow at a target at eye level a distance of 45.0 m away. If the initial speed imparted to the arrow is 68.2 m/s, what angle should the arrow make with the horizontal as it is being shot?
*October 27, 2012*

**books**

CeCe, I agree with part of your statement but not the statement in its entirety. In Jane Eyre you have two people who some might say were destined to unite. Fate said that no matter what at some point these two would get together. Circumstance stood in the way for both of them...
*October 11, 2012*

**physics**

A car traveling initially at +5.7 m/s acceler- ates uniformly at the rate of +0.79 m/s2 for a distance of 262 m. What is its velocity at the end of the accel- eration? Answer in units of m/s What is its velocity after it accelerates for 132 m? Answer in units of m/s What is ...
*September 20, 2012*

**physics**

With an average acceleration of −0.96 m/s2, how long will it take a cyclist to bring a bicycle with an initial speed of 14.8 m/s to a complete stop? Answer in units of s
*September 20, 2012*

**physics**

A window washer drops a brush from a scaf- fold on a tall office building. What is the speed of the falling brush after 2.7 s? (Neglect drag forces.) The acceleration due to gravity is 9.8 m/s2 . Answer in units of m/s How far has it fallen in that time? answer in units of m
*September 20, 2012*

**physics**

A car travels along a straight stretch of road. It proceeds for 11.9 mi at 58 mi/h, then 29.4 mi at 44 mi/h, and finally 36.9 mi at 31.6 mi/h. What is the car’s average velocity during the entire trip? Answer in units of mi/h
*September 20, 2012*

**Physics**

A ball is thrown straight up and reaches a maximum height of 6.71 m. What was its initial speed? The accelera- tion of gravity is 9.8 m/s2 . Answer in units of m/s please give right answer and explain how you got it, thanks !
*September 20, 2012*

**Physics**

Judy, by chance, spots a potted plant falling outside the window at 2.88 m/s . Further down the same building, Judy’s boyfriend clocks the pot at 54 m/s . How far apart are the friends? The acceler- ation of gravity is 9.8 m/s2 . Answer in units of m Please give right ...
*September 20, 2012*

**Physics **

1) A physics book is moved once around the perimeter of a table of dimensions 1 m by 3 m. What is the distance traveled? 2) A window washer drops a brush from a scaf- fold on a tall office building. What is the speed of the falling brush after 2.7 s? (Neglect drag forces.) The...
*September 20, 2012*

**math**

suppose that sin0=-5/13 and that 0 is a quadrant III angle. what is the exact value of cos0
*July 29, 2012*

**Math**

for function f(x)=(x)/x^2-4. 1. State the vertical and horizontal asymtopes. 2. Graph this function.
*July 29, 2012*

**math**

A drawer contains 4 red socks, 3 white socks, and 3 blue socks. without looking, you select a sock at random, replace it and seect a sond sock at random. what is the probablity that the first sock is blue and the second sock is red?
*May 21, 2012*

**Calculus**

The question will first read in English followed by a reading in French. *************************************** If alpha + 2 beta = pi/4 AND tan beta = 1/3. What would tan alpha mesure? (Keep in mind that pi/4 is the same as 45 degrees.) Si alpha + 2 beta = pi/4 ET tan beta...
*April 30, 2012*

**PHY103**

Write 2 arguments in english, one in the form of modus ponens and one in form of modus tollens. Then write the arguments in symbols using sentence letters and truth functional connectives. What advantages does being able to symbolize our arguments provide? Are there ...
*April 12, 2012*

**Chemistry**

How much CuSO4.5H20 would you need to prepare 6 grams of copper ammine complex, [Cu(NH3)]SO4.H20? There is only 1 ammonia molecule in the copper ammine complex. please answer asap, thanks!
*March 27, 2012*

**Algebra**

evaluate the function f(r)= sqrt25-r-6 at the given values of independent variables f(16), f(-x), f(25-2x) and simplify
*March 17, 2012*

**Algebra**

evaluate the function f(r)= sqrt25-r-6 at the given values of independent variables f(16), f(-x), f(25-2x) and simplify
*March 16, 2012*

**HSPA REVIEW **

-Clue 1: I am a Real Number whose value is less than 1 -Clue 2: I do not end -Clue 3: My digits do not repeat. what kind of number am i?
*March 5, 2012*

**7th grade science**

five facts about the stoges of photosynthesis
*February 27, 2012*

**geometry **

an electronic manufacturer wants to ship a stereo system. The system includes the following components: 1 Receiver 20in. x 8in. 1 CD Player 20in. x 8in. x 5in. 1 Dual Tape Deck 20in. x 8in. x 6in. 2 Half-Cylinder Speakers, each with a height of 22 in. and a radius of 4 in. To ...
*February 8, 2012*

**chemistry**

If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?
*February 6, 2012*

**chemistry**

If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?
*February 6, 2012*

**geometry**

Did you get 200 for this particular problem? cause that's what I got, which doesn't make sense to me because it's suppose to be less than 120 since it's the smaller polygon
*February 4, 2012*

**geometry**

How do you find the perimeter of a second polygon given just the scale factor of both polygons and the perimeter of the larger polygon? The problem is Two similar polygons have a scale factor of 3:5. The perimeter of the large polygon is 120 feet. Find the perimeter of the ...
*February 4, 2012*

**math**

Cheryl is training for a long bicycle ride. Jim will drive Cheryl back and her bicycle 60 miles from town, drop them off, and then drive back to town. Cheryl then will ride her bicycle back to town. On the way back to town, Jim will travel at 50 miles per hour and Cheryl will ...
*February 1, 2012*

**math**

daniel collects $87.00 by selling paperback books for $0.50 each and hardcover for $4.00 each. let p be the number of paperback books he sells and h be the number of hardcover books he sells write an equation to represent this situation.
*February 1, 2012*

**math**

58 - 16= 42 42/6 = 7
*February 1, 2012*

**math**

jamie is saving money to buy a cd player that will cost $58, including tax. she has already saved $16. she can earn $6 per hour doing yard work. how many hours will jamie need to work to earn enough money to buy the cd player?
*February 1, 2012*

**Business**

#14 is B WTO #16 is A Perfect Competition
*January 24, 2012*

**math**

let fbe a function that is even and continuous on the closed interval [0,3]. the function f and itsderivatives have the properties indicated in the table below. sketch the graph. x 0 0<x<1 1 1<x<2 2 2<x<3 f(x) 1 (+) 0 (-) -1 (-) f’(x) DNE (-) 0 (-) DNE...
*January 22, 2012*

**math**

(x^3+7x+12)/(x-4) find: x intercepts vertical asymptotes horizontal/slant asymptotes derivative second derivative increasing interval decreasing interval concave up interval concave down interval
*January 22, 2012*

**math**

f(x)=x/(x^2+x-2) find: x intercepts vertical asymptotes horizontal/slant asymptotes derivative second derivative increasing interval decreasing interval concave up interval concave down interval
*January 22, 2012*

**math**

f(x)=x^3+6x^2+9x find: x intercepts vertical asymptotes horizontal/slant asymptotes derivative second derivative increasing interval decreasing interval concave up interval concave down interval
*January 22, 2012*

**Anatomy and Physiology**

Discussion Topic: Chemistry of Life, Cells, and Tissues Select an organ and provide an example of how it uses the following: carbohydrates, lipids, proteins, and nucleic acids. Also, describe an area of interest related to one of the types of molecules, for example, ...
*January 14, 2012*

**Anatomy and Physiology**

Discussion Topic: Chemistry of Life, Cells, and Tissues Select an organ and provide an example of how it uses the following: carbohydrates, lipids, proteins, and nucleic acids. Also, describe an area of interest related to one of the types of molecules, for example, ...
*January 14, 2012*

**physics**

A string under a tension of 43 N is used to whirl a rock in a horizontal circle of radius 3.3 m at a speed of 26.46 m/s. The string is pulled in, and the speed of the rock increases. When the string is 0.635 m long and the speed of the rock is 80.5 m/s, the string breaks. What...
*December 19, 2011*

**A=LxW**

Length of a rectangle is 13 cm less than 5 times it's width. Its area is 28 square cm. Find dimensions of rectangle
*December 6, 2011*

**Geometry**

how do you find the orthocenter of a triangle with the vertices A(4,0) B(-2,4) C(0,6)? Please explain to me how you get x after doing point slope form for the two slopes.
*December 4, 2011*

**chemisty**

give the conjugate base for HNO2
*November 29, 2011*

**geometry**

never mind...i understand
*November 19, 2011*

**geometry**

Hey Steve, Thanks....but how could it be -4?
*November 19, 2011*

**geometry**

what is the orthocenter of triangle with the vertices of X(-11,0), Y(-11,-8), Z(-1,-4)?
*November 19, 2011*

**Reading**

i think it is line 14
*November 14, 2011*

**Chemistry**

Thanks page
*November 9, 2011*

**Psychology**

How do the ideas of positive psychology differ from the traditional model of illness?
*October 18, 2011*

**Arrays and Expanded Algorithm**

82
*September 22, 2011*

**science**

The physical properties of carbon vary widely with the allotropic form.
*September 19, 2011*

**Uni Math**

Simplify and state the domain: x'2 +1 . x'2 - 9 x'2 + 2x – 3 x'2 – 2x -3
*September 15, 2011*

**Geometry. Please help.**

1. The complement of an angle is 10 degrees less than the angle itself. Find the angle and it's complement. Find the perimeter and area of the following figures with the vertices given: a) A (3, 5) B (3, 1) C (0, 1) b) Q (-3, 2) R (1, 2) S (1, -4) T (-3,-4) c) G (-4, 1) H...
*September 14, 2011*

**Geometry. Please help. **

Thank you!!!(= I get it now
*August 30, 2011*

**Geometry. Please help. **

1) Two angles are complementary. The measure of one angle is 21 more than twice the measure of the other angle. Find the measure of the angles. 2) If a supplement of an angle has a measure 78 less than the measure of the angle, what are the measures of the angles? Please don&#...
*August 30, 2011*

**physical science**

what is the freezing point depression when 153g of bromine is added to 1000g of benzene?
*August 18, 2011*

**physical science**

what is the freezing point depression when 153g of bromine is added to 1000g of benzene?
*August 18, 2011*

**physical science**

what is the freezing point depression when 153g of bromide is added to 1000g of benzene?
*August 18, 2011*

**Pen Foster**

checking my answers in Introduction to Allied Health anyone have that one?
*August 12, 2011*

**algebra**

So the answer would be to be able to pay 89.09 more a month.
*August 9, 2011*