Tuesday

July 26, 2016
Total # Posts: 1,590

**chem**

Among the elementary subatomic particles of physics is the muon, which decays within a few nanoseconds after formation. The muon has a rest mass 1.126 109 times that of a proton. Calculate the de Broglie wavelength associated with a muon traveling at a velocity of 3.35 104 cm/s.
*November 14, 2012*

**IT 235**

Post your response to the following questions: For which types of image creations might it be beneficial or necessary to add text? Which text effects do you like to use? How will your final project include text?
*November 14, 2012*

**chem**

please do not spam!
*November 13, 2012*

**chem**

If the detector is capturing 6. 107 photons per second at this wavelength, 1820 nm. what is the total energy of the photons detected in one hour? I got 2e7 but its wrong
*November 13, 2012*

**Physics**

A string that passes over a pulley has a 0.373 kg mass attached to one end and a 0.620 kg mass attached to the other end. The pulley, which is a disk of radius 9.50 cm, has friction in its axle. What is the magnitude of the frictional torque that must be exerted by the axle if...
*November 12, 2012*

**algebra**

It takes a passenger train 2 hours less time than it takes a freight train to make the trip from Central City to Clear Creek. The passenger train averages 96mi/hr while the freight train averages 64mi/hr. How far is it from Central City to Clear Creek?
*November 11, 2012*

**MAT 116**

A tugboat goes 180 miles upstream in 10 hours. The return trip downstream takes 5 hours. Find the speed of the tugboat without a current and the speed of the current.
*November 11, 2012*

**MAT 116**

The perimeter of a rectangle is 28 ft. The length is 10 ft longer than the width. Find the dimensions. Write a system of linear equations and solve the resulting system. Let x be the length and y be the width.
*November 11, 2012*

**chem**

calculate the delta H for 3 Fe(s) + 4 CO2(g) ¨ 4 CO(g) + Fe3O4(s)
*November 8, 2012*

**Physical Education**

Tom served to Sue, who set up Stacey for a spike. Stacey went up for the spike and hit it into the ground on Team A's side. In the process of spiking the ball, Stacey hit the net with her hand. Who won the point and why?
*November 7, 2012*

**Science**

Many portable gas heaters and grills use propane, C3H8(g), as a fuel. Using standard enthalpies of formation, calculate the quantity of heat produced when 11.90 g of propane is completely combusted in air under standard conditions. I got -600 kj but its wrong
*November 7, 2012*

**algebra**

Camille can swim against the current at 1.5 m/s and with the current at 3.5m/s. Write an equation that expresses each fact. How fast can she swim in still water?
*November 7, 2012*

**algebra**

Camille can swim against the current at 1.5m/s and with the current at 3.5m/s. Write and equation that expresses each fact. How fast can she swim in still water?
*November 7, 2012*

**algebra**

The 4200 km trip from New York to San Francisco take 6 h flying against the wind but only 5 h returning. Find the speed of the plane in still air and the speed of the wind.
*November 7, 2012*

**science(reading)**

thank you!!!!
*November 2, 2012*

**science(reading)**

"he proved the existence of neutrons - elementary particles devoid of any electrical charge. In contrast with the helium nuclei (alpha rays) which are charged, and therefore repelled by the considerable electrical forces present in the nuclei of heavy atoms, this new tool...
*November 2, 2012*

**US HISTORY I**

Ms. Sue. Sorry this is my first time posting on this website. I posted the full question to avoid confusion. Let me clarify. My teacher stated that the identifications of these terms would be easy to find in our textbook or on the internet. He then stated that the significance...
*October 31, 2012*

**US HISTORY I**

A New World to the American Revolution Directions: IDENTIFY and give the SIGNIFICANCE of 5 of the 7 terms below. (Caveat! Be thorough! An IDENTIFICATION should answer the four criteria 1.What? 2.Where? 3.When? and 4.Results?, while the SIGNIFICANCE should state Why?) Example: ...
*October 31, 2012*

**Physics **

A 190-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope about the rim of the disk and pulling on the rope. What constant force would have to be exerted on the rope to bring the merry-go-round from rest to ...
*October 31, 2012*

**Science**

I need help with coming up a hypothesis for and Organic Compound lab! Anyone have an idea?
*October 24, 2012*

**physics**

Block 1, of mass1 = 0.550kg , is connected over an ideal (massless and frictionless) pulley to block 2, of mass2 , as shown. For an angle of = 30.0 and a coefficient of kinetic friction between block 2 and the plane of = 0.300mu(kinetic friction), an acceleration of magnitude...
*October 23, 2012*

**Spanish Beg. 1 - help!**

¿Cómo te llamas? = literally means How are you called? Or What's your name? (Most common) ¿Cuál es tu nombre? = What is your name? Me llamo Samantha = I am Samantha Yo soy Samantha = I am Samantha Mi nombre es Samantha = My name is Samantha
*October 22, 2012*

**i need help ss**

1.D 2.b 3.b 4.c
*October 20, 2012*

**soical studys**

1. D 2. B 3. B 4. C
*October 20, 2012*

**Math**

Suppose C(x) measures an economy's personal consumption expenditure and x the personal income, both in billions of dollars. Then the following function measures the economy's savings corresponding to an income of x billion dollars. S(x) = x - C(x) (Income minus ...
*October 19, 2012*

**math**

The weekly demand for the Pulsar 25 color LED television is represented by p, where p denotes the wholesale unit price in dollars and x denotes the quantity demanded. The weekly total cost function associated with manufacturing the Pulsar 25 is given by C(x), where C(x) ...
*October 19, 2012*

**earth**

The global-mean surface temperature of the earth is about 288 degrees Kelvin. Use the Stefan-Boltzman law to calculate the radiative flux corresponding to an object with this temperature. [hint: use σT4 with σ = 5.67x10-8 Wm-2K-4 ]
*October 15, 2012*

**chemistry**

In a bunsen burner experiment, when you place a piece of soot covered chalk over the hottest part of the flame, it changes back to a white color. What is the equation for this process? Thank you
*October 10, 2012*

**reading**

why do the Lina and Doon think tat their arrival has been expected, in the book CITY OF EMBER
*October 10, 2012*

**Chemistry**

if there are 8.3grams of Mg used, how many moles of MgO can you expect to be produced?
*October 3, 2012*

**DEBATE**

How would you present a uniqueness, link,or impact in a policy debate? Someone told me that during the cross examination period. You are supposed to ask a question and once receive the answer you are given permission to add the link but, i forgot how the question was stated. ...
*October 1, 2012*

**Biology**

1. How is both the external adn internal stimuli involved in doing this: You are hungry so you reach for an apple in a fruit bowl. 2. Why is a hypothesis important to controlled experiments? Is it becasue you are trying to explain the effect that it would have to a substance ...
*September 27, 2012*

**math**

How many People answered this question so far and plus I agree
*September 24, 2012*

**Physics**

Your car can accelerate at 5m/^2 without a trailer. You add a trailer to your car that has 3 times the mass of your car. At what rate can your car (plus trailer) accelerate now? After accelerating the car travels at a constant speed of 30 m/s. What is the net force acting on it?
*September 23, 2012*

**health**

in thru nose out thru mouth
*September 22, 2012*

**chemistry**

4. All of these
*September 19, 2012*

**advanced functions math**

You buy a car in 2005 for $7860 and it depreciates linearly. You sell the car for $5040 in 2011.... what does the domain represent in the function? what does the range represent in this function? what is the slope of the linear representation? what is the function that models ...
*September 18, 2012*

**advanced functions math**

You buy a car in 2005 for $7860 and it depreciates linearly. You sell the car for $5040 in 2011.... what does the domain represent in the function? what does the range represent in this function? what is the slope of the linear representation? what is the function that models ...
*September 18, 2012*

**Math**

Ms. Sue I got $45 dollars I multiplied 15 x 3 = 45
*September 12, 2012*

**Math**

Restaurants charge about 3 times the cost of food for items on the menu. A restaurant pays $7 per pound for fish, $2 for a dozen lemons, and $6 for parsley. If 2 fish dinners can be made from this, how much would this meal costs? My answer is $36
*September 12, 2012*

**english**

tan
*September 11, 2012*

**General**

Not much I'm in 10th grade...And have access to a college lab with a teacher that is willing to guide me through
*September 6, 2012*

**General**

This is a question to everybody: I was just wondering if anyone had any science related questions or things they wonder about that may require experiments. If you have any ideas please mention them. I need this for a science for a science fair project and have at most a 6 ...
*September 6, 2012*

**algebra**

1/7x-x=-1/7(2x+84)
*September 5, 2012*

**algebra**

Find the inverse of the following function. Find the domain, range, and asymptotes of each function. Graph both functions on the same coordinate plane -x/3 f(x)=4+e ( if this makes sense, not sure how else to show it. the -x/3 is after the e like -x/3 to the power of e) please...
*August 28, 2012*

**college algebra**

Find the inverse of the following function. Find the domain, range, and asymptotes of each function. Graph both functions on the same coordinate plane f(x)=4+e^-x/3 please help me! show steps also, if i an just given an answer that wont help me! thanks in advance!!!
*August 28, 2012*

**Math**

First I factor 54. 5 4 | | 9 6 |\ \ \ 3 3 3 2 {3 3 3} group of threes that can be out of cubed root Because there are three threes I take them out of the cubed root (# = im going to consider this as my cubed root button) turning #54x^17 into 3#2x^17 Now we factor x^17: there ...
*August 23, 2012*

**math**

f(x)=-2x3+20x2-48x =(?)(-2x)(X-6) how do I find the missing factor of this?
*August 19, 2012*

**math**

How did you turn 5/6 to 1/6
*August 14, 2012*

**Politics/Debate**

thank you so much for today and yesterday
*August 10, 2012*

**Politics/Debate**

are there some important things about domestic infrastructure we should worry or know about? How does demestic infrastructure help us in a positive way and also in a negative way? why would someone negate the substantial increase in development for domestic infrastructure? ...
*August 10, 2012*

**Politics/Debate**

what does this sentence mean in regular english "The United States Federal Government should substantially increase development of domestic infrastructure." and what is the basic meaning of domestic infrastructure? Tahnk you soo much in advance!!
*August 9, 2012*

**college statistic**

A sample of 51 night-school students' ages is obtained in order to estimate the mean age of night-school students. x = 26 years. The population variance is 19. (a) Give a point estimate for μ. (Give your answer correct to one decimal place.) (b) Find the 95% ...
*July 23, 2012*

**college **

Consider a normal population with μ = 36 and σ = 4.9. Calculate the z-score for an x of 47.6 from a sample of size 14. (Give your answer correct to two decimal places.)
*July 23, 2012*

**John jay college**

A random sample of n = 9 scores is obtained from a population with μ = 50 and σ = 9. If the sample mean is M = 59, what is the z-score corresponding to the sample mean? z = 3.00 z = 1.00 z = 9.00 cannot determine without additional information
*July 22, 2012*

**John jay college**

A random sample of n = 9 scores is obtained from a population with μ = 50 and σ = 9. If the sample mean is M = 59, what is the z-score corresponding to the sample mean?
*July 22, 2012*

**college math**

The ratio of soda to diet soda in Bill's Supermarket is 8 to 9. If a person counted 72 bottles of soda, how many bottles of diet soda are there?
*July 19, 2012*

**Personal Finance**

During a job interview Pam Thompson is offered a salary of $2800. The company gives annual raises of 6 percent. What would be Pams salery during her 5th year on the job?
*July 15, 2012*

**Math**

The average (arithmetic mean) and median of the five numbers a,a,b,c, and c are 20 and 30, respectively. If a < b < c, what is the value of a + c?
*July 11, 2012*

**Math**

If it takes 6 minutes to travel from point A to point B at a constant speed of 60 miles per hour, how many minutes does it take to travel the same route from point A to point B at a constant speed of 50 miles per hour?
*July 11, 2012*

**Math**

f(x) = (1/3)x the fraction one third x
*July 11, 2012*

**Math**

f(x) = 1/3x + 3 and g(x) = x - 2 The functions f and g above are defined for all values of x. In the xy-plane, what is the y-coordinate of the point of intersection of the graphs of f and g?
*July 11, 2012*

**Math**

if (a^6 x a^6)^k = (a^3)^(k+5), solve for k
*July 11, 2012*

**Math**

At a company, there are y more male employees than female employees. If there are x male employees at the company, what fraction of the employees are male, in terms of y and x?
*July 11, 2012*

**english**

Snow skiing is a very exciting sport. what type if sentence pattern is this? S-v,s-v-io, s-v-io-do,e-v-s,s-lv-pn,s-lv-pa, s-v-do-oc, question pattern
*July 10, 2012*

**math**

Solve the following problem. Round answer to two decimal places when necessary. I=240 W=1/3 A=1*W A=
*July 2, 2012*

**Management**

Critical thinking is very important in making decisions that impact an organization’s growth and survival. Which of the following traits of a critical thinker is essential in this process?
*June 8, 2012*

**science**

what do you call a river or stream that runs or flows really fast?
*June 7, 2012*

**chemistry**

what mass of acetylene, C2H2, will be produced from the reaction of 90 g of calcium carbide, CaC2, with water in the following reaction? CaC2+2H2O-->C2H2+Ca(OH)2
*May 28, 2012*

**Chemistry**

An etheral solution contains benzoic acid, 9-fluorenone, abd ethyl 4-aminobenzoate. Why would benzoic acid and 9-fluorenone not be extracted from this etheral solution by aqueous HCl ?
*May 15, 2012*

**algerbra 2**

What did the baby pocupine say when it backed into a cactus?
*May 13, 2012*

**computers**

Imagine that you have been hired as an IT consultant and have been asked to write a recommendation for an OS. This start-up company primarily develops games and has approached you to recommend an OS for its 25 employees who use desktop PCs. The primary purpose of the desktops ...
*May 10, 2012*

**algebra 2**

Solve the inequality (x-3)/(2x+1)>0
*May 2, 2012*

**Math**

There are 40 tags numbered one through 40 in a bag. What is the propability that Glen will randomly pick a multiple of 5 and then a multiple of 9 without replacing the first tag?
*May 1, 2012*

**Algebra 1**

1. 5x + 9 = 3x + 1 2. 14 + 7n = 14n + 28 3. 22(g 1) = 2g + 8 4. d + 12 3d = 5d 6 5. 4(m 2) = 2(3m + 3) 6. (4y 8) = 2(y + 4) 7. 5a 2(4a + 5) = 7a 8. 11w + 2(3w 1) = 15w 9. 4(...
*April 28, 2012*

**Science**

Changing the current changes the ___ of an electromagnet. Choices are: A. strength B. direction C. charge D. both a and b
*April 17, 2012*

**Math**

I need help trying to write out these binomial expansions: they all need to be raised to the 8th power. Thanks 1. (x + y) 2. (w + z) 3. (x - y) 4. (2a + 3b) - Now explain how your answer for #1 could be used as a formula to help you answer each of the other items. In each case...
*April 16, 2012*

**Chemistry**

I need help with this in order to correctly complete my other related problems. Thank you so much in advance =) Arrange the following 0.1 M solutions in order of increasing pH and state why you placed each solution in that position: NaCH3COO, HCl, HCN, NaOH, NH3, NaCN, KNO3, ...
*April 15, 2012*

**Chemistry**

I need help with this in order to correctly complete my other related problems. Thank you so much in advance =) Arrange the following 0.1 M solutions in order of increasing pH and state why you placed each solution in that position: NaCH3COO, HCl, HCN, NaOH, NH3, NaCN, KNO3, ...
*April 15, 2012*

**History**

Q: Which governmental position was NOT held by James F. Byrnes? Choices are: A. U.S. Secretary of State B. U.S. Supreme Court justice C. governor of South Carolina D. vice president of the United States
*April 15, 2012*

**History**

Q: What action did the United States NOT take against Japan before the attack on Pearl Harbor? Choices are: A. cut off the sale of oil and metal to Japan B. sent the Japanese ambassador back to Japan C. froze all the Japanese assets in the United States D. discontinued ...
*April 15, 2012*

**MATH**

What is the sum of (x^2-3x+2) and (5x^2-3x-8)? show your work help me!!!
*April 15, 2012*

**math**

Two prisms are similar. The surface area of one is four times the surface area of the other. What is the ratio of the corresponding dimensions?
*April 13, 2012*

**math**

A snailis trying to climb up a cup left by some students that littered.Each hour the snail slithers up 2`` but when he is tired he sleeps and slides 1``. How many hours until he reaches the top of the cup with a height of 10 is this an integer question?
*April 12, 2012*

**math patterning**

Look over the following sequence of numbers. What are the next 3 numbers in the pattern?what is the pattern rule? -1,0,1,0,1,2,3,6,11,20,37
*April 12, 2012*

**Algrebra**

I need to find the approximate surface area of a cone with the R=5 and L=6. I thought I figured it out by 3.14(5)(6) which will give me 94.2 I then would take 94.2 +3.14(5)squared and I came up with 172.7, but my answer should be either 20m squared, 98m squared, 118m squared ...
*April 9, 2012*

**Calculus**

Let L1 be the line with the vector equation r= (-2,3) +s(-1,3), seR. Let L2 be with the line with parametric equation x=3t+2, y=t-7, teR. Are L1 and L2 perpendicular? How do you know?
*April 8, 2012*

**Western experience**

Oops I meant c.
*April 3, 2012*

**Western experience**

I was thinking D by the way because calculating technology doesnt have much to do with communication
*April 3, 2012*

**Western experience**

All of the following are late-twentieth century technological developments that have revolutionized communication except A) development of the world wide web B) development of the personal computer C) development of calculating machinery D) development of the microchip E) ...
*April 3, 2012*

**biology**

I have the fetal pig test on muscles in AP biology class coming up soon. And I was wondering if anyone knows any good online sites where thye give pictures and i can practice labeling the muscles on the pig.. thanks
*April 1, 2012*

**PLEASE HELP!!!**

actually that is the kind of way i did it. I almost did 2 experiments on a total of 150 people. Thanks anyway
*March 31, 2012*

**PLEASE HELP!!!**

thank you
*March 31, 2012*

**PLEASE HELP!!!**

Hi, I'm doing a science fair and they're asking us to put pictures of us doing experiments or to bring in a model. In my project I experimented on people so was I supposed to take pictures of people performing the tasks? I already did the project and experiments and ...
*March 31, 2012*

**science fair**

Hi, I'm doing a science fair and they're asking us to put pictures of us doing experiments or to bring in a model. In my project I experimented on people so was I supposed to take pictures of people performing the tasks? I already did the project and experiments and ...
*March 31, 2012*

**History**

Why was South Carolina placed under military control? I think it is because it refused to ratify the 13th Amendment, but I am not sure.
*March 28, 2012*

**Algebra**

If a football field's length is 120 yds. and its width is 53 1/3 yards and a soccer field's lenght is 130 yds and its width is 100 yards how many times the area of the small field is the area of the larger field? I multiplied the length x width and got 6,400 for area ...
*March 28, 2012*

**physical science**

absolute zero is the same as
*March 27, 2012*