Friday
September 19, 2014

Posts by Ben


Total # Posts: 672

american government
2. In federalism, the national government (Points : 1)
June 23, 2010

physics
Two packages at UPS start sliding down the 20° ramp shown in Figure P8.25. Package A has a mass of 3.5 kg and a ­coefficient of friction of 0.20. Package B has a mass of 10 kg and a coefficient of friction of 0.15. How long does it take package A to reach the bottom?
June 16, 2010

Computer Science JAVA FUNCTIONS
Write a Function You will be given one of the following problems to solve using and writing Python functions. Given a list of words, return an array which indicates the frequency that each letter occurs. For example, in the list [”apple”, ”bob”], [ ’a...
May 31, 2010

computer science
Hey I have three questions with creating these methods can any of you guys write an example code for this? Thanks Write a Function You will be given one of the following problems to solve using and writing Java functions. 1. Given a list of words, return an array which ...
May 28, 2010

computer science
Hey I have three questions with creating these methods, thanks. Write a Function You will be given one of the following problems to solve using and writing Java functions. 1. Given a list of words, return an array which indicates the frequency that each letter occurs. For ...
May 28, 2010

algebra
length and width of a rectangle A=198 in width =x length =x+7
May 15, 2010

physics
The potential energy stored in the compressed spring of a dart gun, with a spring constant of 36.00 N/m, is 0.880 J. Find by how much is the spring is compressed.
May 10, 2010

physics
The potential energy stored in the compressed spring of a dart gun, with a spring constant of 36.00 N/m, is 0.880 J. Find by how much is the spring is compressed.
May 10, 2010

physics
The potential energy stored in the compressed spring of a dart gun, with a spring constant of 36.00 N/m, is 0.880 J. Find by how much is the spring is compressed.
May 10, 2010

geometry
the slope of a line that is perpendicular to (2,4) and (-1,0) is
May 10, 2010

4th grade
Hi
May 6, 2010

economics
Suppose velocity is stable, What would the Federal Reserve need to know in order to keep output at its natural level following a supply shock?
May 3, 2010

phys101
The heat-energy needed to produce any temperature change in the liquid is: DeltaH = mass x heat-capacity x DeltaT where DeltaT is the change in temperature. The heat-energy needed to melt the ice is: Hmelting = mass x heat-of-fusion Lets assume the final temperature is 'T...
April 29, 2010

alegbra
The answers are all coordinates in this format: (x,y) The first equation y=0, means that the answer looks like this: (x,y=0) or (x,0) If y=0, you can replace y in the second equation so you get x=0+2=2 So x=2. Answer: b) (x=2,y=0) or (2,0)
April 29, 2010

science
Describe the bonds that "un-zip" during the replication of dna.
April 26, 2010

science
Describe the bonds that "un-zip" during the replication of dna.
April 26, 2010

9th grade English
you need an apostrophe on "Tybalts" in the last line. Nice job
April 7, 2010

8th grade algebra
exponent of 1000
March 30, 2010

american intercontinental university
The fresh water should taste sweet because of the sugar residue left in your mouth
March 30, 2010

Algebra
2x-6y<18 when I change this to the other form I get y>-2/6+(-3)but when I graph it all the points come out = to instead of > than. What am I doing wrong.
March 30, 2010

6th grade Language Arts
We made a compromise
March 30, 2010

chemistry
Thank you very much for your time.
March 15, 2010

chemistry
Nitroglycerine decomposes according the the equation: 4C3H5(NO3)3 -> 12 CO2 + 10 H2O +6N2 + O2. 15.0 g of nitroglycerine is placed in a 500 ml flask at 25.0 C. The vapor pressure of water at this temperature is 23.8 mmhg. Find the total pressure in the flask after the ...
March 15, 2010

physics
rofl do you go to W-L?
March 10, 2010

Physics
A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to rebound at an angle θ'2 = 44° from the neutron's initial direction. The neutron's initial speed is 7.0 ...
March 7, 2010

Physics
A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. The helium nucleus is observed to rebound at an angle θ'2 = 44° from the neutron's initial direction. The neutron's initial speed is 7.0 ...
March 7, 2010

math algegra
one type of probablity used practically daily is?
February 27, 2010

Math
how do you solve: 2A^2-7a-15
February 24, 2010

Mathematics
Thanks. i worked it out and it came out to = 4 liters
February 24, 2010

geography
what is china's culture? please give examplesa Thank you!
February 23, 2010

Chemistry
A sample of .234g of carbon is placed in a closed stainless steel bomb with .502g of of oxygen gas. The mixture is ignited giving of carbon dioxide. How many grams of carbon dioxide should be obtained upon combustion?
February 21, 2010

Finance
John borrowed $1,000 discounted at 10% for six months. How much did he receive when the loan was made? I get $952.38 by using the formula below: 1000=P(1+.10/2)^(.5*2) - am I doing this right?
February 18, 2010

Finance
Determine the amount of each payment to be made to a sinking fund in order that enough money will be available to pay off the following loan. $29,000 loan, money earns 12% compounded annually, 42 months. I tired doing this using the future value of an ordinary annuity formula...
February 18, 2010

Math (repost)
In standard form, find the equation of the circle that passes through the origin and x-intercept 1 and y-intercept 2. (I fixed a correction a little too late after a response.) Help please? thanks!
February 7, 2010

Physics
Calculate the speed needed by a spacecraft to maintain a circular orbit at about 350 km above Earth’s surface. (it's a project where we create our own spaceship. let's say the craft is 500kg) --- Not sure about the formula to find this. All I know is that it may ...
February 6, 2010

Math
woah, oops. the y-intercept is 2.
February 6, 2010

algebra
You can work a total of no more than 34 hours per week at your two jobs. House cleaning pays $8 per hour and your sales job pays $6 per hour. You need to earn at least $245 per week to cover your expenses. Write a system of inequalities that shows the various numbers of hours ...
February 4, 2010

chemistyr
0.115
February 2, 2010

math/probability
the anwser is 4
January 15, 2010

Pre-algebra
nope,I'm not very good in math as well :(
December 13, 2009

Social Studies
What is the Socratic Method?
December 13, 2009

Pre-algebra
hi,are you good at World History?
December 13, 2009

Social Studies
Um excuse me,could you help me with this one problem I have?I don't understand it
December 13, 2009

science
Hi, quick question: Graphite is burned in oxygen to give carbon monoxide and carbon dioxide. If the product mixture is 33% CO and 67% CO2 by mass, what is the heat from the combustion of 1.00 g of graphite? dH values: CO:-110.5 kj/mol, CO2: -393.5 kj/mol Thanks!
November 24, 2009

Calculus
Use linear approximation, i.e. the tangent line, to approximate 8.4^(1/3) as follows: Let f(x)= x^(1/3) . The equation of the tangent line to f(x) at x=8 can be written in the form y=mx+c where m=1/12 and c=4/3: Using this, find our approximation for 8.4^(1/3).
November 15, 2009

AP Chem
This post helped immensely, thank you so much and merry Christmas!
November 12, 2009

science
which of earth's spheres extends into all others
November 11, 2009

Math
Use linear approximation, i.e. the tangent line, to approximate sqrt[3] { 8.4 } as follows: Let f(x) = sqrt[3] x. The equation of the tangent line to f(x) at x = 8 can be written as y=mx+c where m=1/12 b=4/3 find the approximation for sqrt[3] {8.4}
November 8, 2009

8th grade
Please Help Me. I'm doing a Science Fair Project, and I need help with finding simmilar experiments to mine. My experiment is: Which saliva is cleaner: Cat, Dog, or Human???
October 28, 2009

world history
why did the industrialized nations of the world embark so aggressively upon imperialist ventures between 1880 and 1914?
October 26, 2009

Physics (Rotational Kinetic Energy)
Hello, The question is: A solid ball rolls along the floor with a constant linear speed v. Find the fraction of its total kinetic energy that is in the form of rotational kinetic energy about the center of the ball. Krot/Ktotal = ? The answer I keep getting is 3/1, but the ...
October 21, 2009

psychology
It also depends on the habituation of the stimulus. Rather than conditioned excitation, you would get conditioned inhibition here.
October 21, 2009

Biology
How is the expression of sex-linked genes similar and different from the expression of autosomal genes?
October 21, 2009

Biology
How is the expression of sex-linked genes similar and different from the expression of autosomal genes?
October 20, 2009

french
YOU legs hurt?
October 20, 2009

English
free verse does not mean don't use needed punctuation or capitalization. As I searched for examples of free verse, I found many that didn't have punctuation (which caused ideas and thoughts to run together) and didn't have capitalization, which distracts from the ...
October 20, 2009

Biology
I am having trouble descibing how the expression of sex-linked genes is similar and different from the expression of autosomal genes?
October 20, 2009

economics
Suppose that the government decides to charge cola consumers an excise tax. Before the tax, the market is in equilibrium, where 12 million cases of cola are sold every month at a price of $3.50 per case. After the tax, 6 million cases of cola are sold every month; consumers ...
October 16, 2009

math 8th grade
72/100=x/200 **cross mulitply: 100x=72*200 100x=14400 x=14400/100 x=144 ______ Or just multiply .72 by 200 .72*200=144
October 5, 2009

Physics (Normal Force)
When a book weighing 10 N is placed on a table, the table exerts a normal force of 10 N on the book. When a crate weighing 250 N is placed on the same table, the table exerts a normal force of 250 N on the crate. Explain the mechanism that allows the table to exert just the ...
October 1, 2009

calculus
how do you solve e^(9ln2)
September 29, 2009

10th grade algebra
7x-15y+9=0 **Subtract 9 from both sides 7x-15y=-9 **Subtract 7x from both sides -15y=-7x-9 **Divide both sides by -15 y=(7/15)x+(9/15) <--- equation isolate for y
September 22, 2009

chemistry
12
September 18, 2009

biology
What do you think?
September 7, 2009

Math (Angle Calculation)
Would -75.74 degrees be the same as 284.26 degrees?
September 7, 2009

math
Could you tell me how exactly to graph piecewise functions.
July 23, 2009

pchem
Use R = 8.2 × 10–5 m3 atm/mol K and NA = 6.02 × 1023 mol–1. The approximate number of air molecules in a 1 m3 volume at room temperature (300 K) and atomospheric pressure is: 41 450 2.5 × 1025 2.7 × 1026 5.4 × 1026
June 24, 2009

Chemistry College (Need to know!)
How is this Possible GK. Everywhere I have looked, including mark schemes and chemistry websites dH(solution) is worked out via this equation: dH(solution) = dH(LE) - dH(hyd) + dH(hyd) What is it you are working out with solute and solvent?
June 11, 2009

Chemistry College (Need to know!)
Am I Correct in assuming this? dH of solution = -dH of lattice enthalpy + dH of hydration E.g: dHsolution NaCl = -dHLE NaCl(s) + dHhyd Na+(g) + dHhyd Cl-(g) Units as kJmol-1
June 11, 2009

Chemistry College
Am I Correct in assuming this? dH of solution = -dH of lattice enthalpy + dH of hydration E.g: ÄHsolution NaCl = -ÄHLE NaCl(s) + ÄHhyd Na+(g) + ÄHhyd Cl-(g) Units as kJmol-1
June 10, 2009

Chemistry College
Well to be honest I wasn't there for the teaching of this in my class due to University interviews. I was just wondering how you actually work through them as other websites i have been on have all been in too much (universty standard) detail. Thank you for the fast response!
June 10, 2009

Chemistry College
Is there a simple formula for the Enthalpy of solution and/or hydration?
June 10, 2009

english
hi what does this quote mean I am responsible. Although I may not be able to prevent the worst from happening, I am responsible for my attitude toward the inevitable misfortunes that darken life. Bad things do happen; how I respond to them defines my character and the quality ...
May 24, 2009

8th grade
its not beef flat retard.
April 1, 2009

us
hi i have to write a paper stating that malcolm x was a better leader than martin luther king jr. I need a lot of help
March 30, 2009

history
what other civil rights leaders could i really use
March 24, 2009

history
hi. I need to write a 5 page paper describing how Martin Luther King's leadership was not needed in the civil rights movement. I need a lot of help and information. Thank you soo soo much.
March 24, 2009

chemistry
i dont get part three at all please help
March 16, 2009

chemistry
suppose that you could decompose 0.250 mole of Ag2s into its elements a.How many moles of silver would you have? how many moles of sulfur would you have? b. how many moles of ag2s are there in 38.8 g of AG2S? how many moles of silver and sulfur would be produced from this ...
March 16, 2009

chemistry
can u show me how to set it up because i dont get it at all
March 16, 2009

English
I'm confused. In the Great Gatsby, did Myrtle get killed in Chapter 8 or was that a flashback, or something that Nick just learned of at that time? Thank you
March 12, 2009

science
look
March 12, 2009

Historical Fiction
My teacher wants me to write a historical fiction story. We need a source from the internet with ".edu" at the end of the address. My paper is going to be on World War II, so could you find a website on World War II with ".edu" at the end?
March 2, 2009

Chemistry
2. Calculate the volume for the following object If you know that the object has a mass of 24 grams and the density is 12 g/ml. I tried to get rid of the 24 by multiplying it on both sides, and dividing on both sides, but neither worked. What will then? Thanks!
February 15, 2009

Jiskha in General
Are some of the people on this site teachers? How do they have time to answer our questions? Don't they have to grade papers and such? I'm just curious and grateful that some people are willing to always be on here.
February 15, 2009

chemistry
We have 1 mol of N2 gas that is heated at constant pressure from 300K to 5770K on the surface of the sun. i) Find H and S given that P for nitrogen is (25.7 + 0.0130T) J/mol-K. ii) Now, redo your calculation assuming that the second T-dependent term in the P ...
February 11, 2009

4th grade
What is the correct way to write each of these Titles correctly? 1.highlights 2.child of fire 3.the downtown news 4.number the stars
February 5, 2009

MIST
SIN (X+Y) SIN (X-Y) = SIN ^2X - COS ^2Y
February 3, 2009

History
Hi. I need to find a lot of information on World War II. My teacher wants me to use only websites that have .edu at the end. Could you help me find a website?
January 31, 2009

math
sketch the graph of y^2=(1/4)x
January 30, 2009

physical science!!!!!!!!
1. Alex pulls on the handle of a claw hammer with a force of 15 N. If the hammer has a mechanical advantage of 5.2, how much force is exerted on a nail in the claw? 2. While rowing in a race, John pulls the handle of an oar 0.08 m on each stroke. If the oar has a mechanical ...
January 22, 2009

physical science
Alex pulls on the handle of a claw hammer with a force of 15 N. If the hammer has a mechanical advantage of 5.2, how much force is exerted on a nail in the claw?
January 22, 2009

history
did native american colonize or immigrate?
January 19, 2009

calculus
It is known that if m <= f(x) <= M for a <= x <= b, then the following property of integrals is true. m(b-a) <= int_a^b f(x)dx <= M(b-a) Use this property to estimate the value of the given integral. ? <= int_0^3 3/(1+x^2)dx 2 <= ? solve for the ?
January 17, 2009

calculus
given: f(x) = 2-1/4 x Evaluate the Riemann sum for 2 ≤ x ≤ 4 , with six subintervals, taking the sample points to be left endpoints.
January 16, 2009

Chemistry
How can you separate compounds?
January 13, 2009

us history debate
i really don't know what to do. PLease please help me
January 12, 2009

us history debate
Hi. I am doing a debate on wheter united states imperialism in the late 1800s to early 1900s was justified. I am on the side that states that imperialism was justified. I need help coming up with points to put in my rebuttal. i already have my opening statemnt done but I don&#...
January 12, 2009

Algebra
Give the domain for each of the following: 5+2y/6 5-r/r 2y+1/y+5 I dont get these so yea thank you!
January 8, 2009

Recent History
I don't understand what the big deal was about Y2K. Why would the world stop just because the computers would...I mean we existed all of these years without computers. It would make life more difficult certainly, but it wouldn't entirely end life as we know it.
January 5, 2009

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