Saturday
May 30, 2015

Posts by j


Total # Posts: 782

math
You have 2 floors, and there are 14 steps inbetween the two floors. you have a cat that can get to the top by either taking one step at a time or two steps. ( at one time going up the cat can take both one or two steps). How many possible combinations are there for the cat to ...
September 2, 2011

geometry
Given ABCD, solve for x.
August 30, 2011

geometry
Line e bisects line xy at m and divides line xy into two equal parts. name a pair of congruent segments.
August 24, 2011

chemistry
sorry. The reaction is: 2 NO(g) + Cl2 ---><--- 2NOCl deltaH is the heat of reaction deltaS is the change in entropy T is temperature in kelvin deltaG is a direct measure of spontaneity DeltaH (kJ/mol) 2NO= 90.29/mol DeltaH (kJ/mol) Cl2= 0 DeltaH (kJ/mol) 2NOCl= 51.71/mol...
August 1, 2011

chemistry
Gibbs free energy What is the equilibrium constant at 25 C? deltaG= deltaH - (T(K)+deltaS) deltaS= -121.1 deltaH= -77.36 so at 25 C deltaG = -77.36 - (298*(-121.1)) deltaG ~ 3.6*(10^4) so my question is: what *is* the equilibrium constant, or perhaps more accurately, how does ...
August 1, 2011

rate of reaction (formatted repost)
I can't get my table to line up so I've surrounded the values in curly brackets. Experiment [SO2]i [O2]i IRD O2 {1} {0.05} {0.05} {7.3*[10^(-2)]} {2} {0.10} {0.05} {2.9*[10^(-2)]} {3} {0.10} {0.15} {2.6*[10^(-1)]} {4} {0.12} {0.12} {?????????????} so overall oreder is ...
July 20, 2011

rate of reaction
What is the initial rate of *appearance* of SO3(g)? a reaction and table are given: reaction: 2S02(g)+O2 -------> 2 SO3(g) Table note: i= initial, IRD= initial rate of disappearance; concentrations given in molarity (M) IRD given in M/s. Experiment [SO2]i [O2]i IRD O2 1 0....
July 20, 2011

math
Express the volume of a rectangular solid (box) whose height, width and length are x,2x and 3x, respectively, as a function of its width.
July 1, 2011

Psychology
While all four are definitions of a mental disorder, the correct answer is D.
June 28, 2011

physics
a driver releases an air bubble of volume 2.0 cm^3 from a depth of 15 m below the surface of a lake where the temperature is 70C.
June 21, 2011

chemistry
13.88 mol oxygen
June 3, 2011

Education
So are the answers B, and D
May 9, 2011

chemistry
Is there a relationship between HOMO & LUMO and bonding & antibonding? Explain.
April 18, 2011

PHYSICS
Its actually FFTF, thanks for the help
April 15, 2011

PHYSICS
A) As a wind instrument warms up, the resonant frequencies of the instrument tend to slightly decrease. B) If the air in a concert hall warms up, the resonant frequencies of the string instruments will change precisely the same as the resonant frequencies of the wind ...
April 15, 2011

Chemistry
30g
April 13, 2011

calculus
A rectangular box is to be constructed from two different materials. The box will have a square base and open top. The material for the bottom costs $4.25/m2. The material for the sides costs $2.50/m2. Find the dimensions of the box with the largest volume if the budget is $...
April 9, 2011

math
A circular pie with a diameter of 9.8 inches is cut into 7 equal slices. What is the approximate area of one slice?
March 31, 2011

math
Denisha used 9 balls of clay and 16 straws to make a solid pyramid.how many faces does the solid have?
March 29, 2011

physics
An object traveling 200 feet per second slows to 50 feet per second in 5 seconds. Calculate the acceleration of the object.
March 28, 2011

math
What is the degree of the 3rd angle if the other two are 68 degrees?
March 28, 2011

Math
20(1/5n - 3/4) + 9n
March 22, 2011

physics
0.35
March 20, 2011

Financial Management
500
March 6, 2011

coordinate geometry
all i gotta do is find slope & y intercept this is 6th math
March 3, 2011

coordinate geometry
some smart person solve thiss ;] y-18x+18=4 or help me im confused
March 3, 2011

chemistry
The simple rule “Like dissolves like” is often used to describe the solubility of a substance in different solvents. Write a short paragraph discussing your evidence for this rule. Include in your discussion where you think this rule works best and where it seems to ...
February 27, 2011

Physics
A 55.0 kg girl is roping through the top of a tiny tree. She quickly swings down from her 12.0 m high perch and grabs a 21.0 kg dog as she swings. They barely swing back up to a tree limb. How high is this tree limb?
February 15, 2011

physics-mechanics
A high-speed test track for cars has a curved section — an arc of a circle of radius R = 1440 m. The curved section is banked at angle a = 19.1 degrees from the horizontal to help the cars to stay in the road while moving at high speeds. The acceleration of gravity is 9.8...
February 12, 2011

Math
Need help solving this problem. If there's an equation at the end, need help in how to solve that also. Compounded interest problem. Principal $825. Rate 4%. Compounded Annually. Time 10 years.
February 9, 2011

j
What were the factors that played a significant role in the collapse of Russian control over Eastern Europe?
February 7, 2011

arithmetic
How do I solve these questions? 3 1/3 - 2 2/5= 2.75 + .003 + .158 = 7/20 is equal to ? What is the value of the expression 2x2+ 3xy – 4y2 when x = 2 and y = - 4? 16x - 8 = If 2x – 3(x + 4) = - 5, then x = – 3(5 – 6) – 4(2 – 3) =
February 3, 2011

Calculus
find lim f(x) - lim f(x) x->infinity x->-infinity if f(x)=ln (x+sqrt[x^2+a^2])/(x+sqrt[x^2+b^2]) a and b are real numbers
February 2, 2011

Calculus
find lim f(x) - lim f(x)
February 2, 2011

Physical Science
If a person is traveling at a rate of seventy five miles per hour in a straight line, how far would they travel in three seconds?
February 1, 2011

Physics
A watch manufacturer claims that its watches gain or lose no more than 8s in a year.
February 1, 2011

comm
extra is a adjective right???
January 18, 2011

comm
envelope-adverb credit-adjective spent-adverb
January 18, 2011

comm
came over- adjective frowning- adverb
January 18, 2011

comm
this is the reason why getting a credit card at a young age is not a great idea because you get anxious and want to buy a lot of things when you know you don't have the money.
January 18, 2011

comm
yes i do need help
January 18, 2011

comm
i need help identify adjectives and adverbs:My dad added me as an extra card holder on his credit cards. I was very excited that I could purchase products now and pay for them later. I didn’t realize how much money I was spending. He came over to my house recently, ...
January 18, 2011

physics
Okay, I have an example problem that I'm trying to solve that comes with the answer; I'm just trying to figure out what to do. A man jogs at a speed of 1.8 m/s. His dog waits 2 s and then takes off running at a speed of 4 m/s to catch the man. How far will they have ...
January 15, 2011

Conductivity
you are amazing!
January 12, 2011

history
Who were some of the original Texas Wildcatters?
January 6, 2011

physics pleaaaaaaaaaaaaaaaaaaaaaaaaaaaaaase I need
Consider a square ABCD of side 10cm and total mass 10kg. Let O be the center of the sqaure. We cut a square of corners O and C. Find the central mass of the obtained shape after removing the small cutten sqaure. I appreciate your help. thank you
January 6, 2011

math/ physics
Consider a square ABCD of side 10cm and total mass 10kg. Let O be the center of the sqaure. We cut a square of corners O and C. Find the central mass of the obtained shape after removing the small cutten sqaure. I would appreciate your help. thank you
January 6, 2011

algebra
2y-6x=8 2y=6x+8 y=3x+4 please explain this to me
January 5, 2011

math
i was shown example: x+6=-5 6=-5 6--5=x x=-11 please explain to me how they got this
January 5, 2011

world history
What are some characteristics of Greek civilizations?
December 14, 2010

Physics
TH/TC=(1)/(1-0.308)
December 10, 2010

physics
your so stupider than me if you donts know hows to do this problam!
December 6, 2010

Europe
what is the most important advantage og having germany in the European Union?
December 2, 2010

Chemistry
-q = dH ( dH = change in enthalpy Kj/mol) Use q=mc(Tf-Ti) and then convert to deltaH q=mc(Tf-Ti) q =? c= 4.814 J/g*C use specific heat of water since its in aqueous sol and we are not told differently m= total mass= mass KBr + mass water mass KBr= 5.0 g *mass of water from ...
December 2, 2010

math
Hmm 12 is already an even number! Hence you should not count 12 twice, therefore answer should be 7/15. :)
November 27, 2010

social studies
Hi majenta, In my view a thesis statement is only good if it is properly justified. In this case, you have to clarify what you mean by "important" - which may be subjective (different people may interpret it differently) as well as rather broad. So like what I think ...
November 27, 2010

holy name university
Hi january, Dalton's Law of partial pressures states that P(total) = P(1) + P(2) + P(3) +....+ P(n) where 1, 2 and 3 are gases in the mixture. So applying the law 150kPa = 100kPa + 24kPa + P(oxygen) Hope I helped! (: -J
November 27, 2010

chemistry
Oops, sorry, my apologies for typing in caps. Was just trying to point that out. :)
November 26, 2010

chemistry
Hi faye, Alright so we want to prepare a 800ml solution of 0.15M concentration. So first we calculate the amount of Ca(OH)2 **NOTE: SHOULD NOT BE CA(OH) COS +2 CHARGE OF CA2+ IS NOT BALANCED! CA(OH)2 IS A SOLID AND NOT AN ION, HENCE THE COMPOUND CANNOT HAVE AN OVERALL CHARGE...
November 26, 2010

Chemistry
Hi Lindsay, Alright, to begin with, since this is an organic compound, we identify the functional group. [-C(=O)-NH- means its an amide] So when you hydrolyse an amide, you are breaking the (amide) bond between C=O and N-H, and you add water because its a hydrolysis (OH- goes ...
November 24, 2010

chem class
Hi laney, For this question, it would be appropriate for you to ask yourself.. what is present in the solution after mixing? KOH is a strong basic salt while HCL is a strong acidic salt. KOH + HCL --> KCL + H2O Note that amount of KOH = HCL = 0.125 X (50/1000), so there is ...
November 24, 2010

chemistry
Hi roseanne, First, we write out the equation when MX2 dissolves in water (or a suitable solvent): MX2 --> (reversible arrow) M2+ + 2X- So Ksp = [M2+][X-]^2 Solubility would refer to the concentration of an ion produced in 1:1 ratio with the original solid. In this case, we...
November 24, 2010

Chem, LAST ONE PLEASE HELP!
Hey Tara, Hmm, I'm not too sure about this question, but I'd guess it has something to do with the following formula: G = G(not)+ RTlnQ So basically G(not) = -67.4 kJ R= 0.008314 kJ mol^-1 K^-1.(molar gas constant)(Note that units must be kJ to match up with the G(not...
November 24, 2010

physics
Hi sweetie, As a coconut is falling down, the only force acting on it is the gravitational force (its weight) if you neglect air resistance. So as it is accelerating as it falls, velocity ______. P.E. of coconut = mgh, where m = mass of coconut, and h = height of coconut above...
November 24, 2010

physics
Hi sweetie, momentum = mass (kg) X velocity (m/sec). So for 1) At rest, velocity = 0m/sec. So momentum should be.... (Apply formula above) [Ans:0 kgm/sec] for 2) At that final state, velocity = 30m/sec. So momentum should be.... (Apply formula above) [Ans: 90,000kgm/sec] for 3...
November 24, 2010

chemistry
Hi Tara, To find out if a reaction is spontaneous, we calculate E(cell). If E(cell)>0, reaction is spontaneous. If E(cell)<0, reaction is not spontaneous. If E(cell)=0, reaction will proceed until equilibrium is established. So in this case, E(cell) = E(reduction)-E(...
November 24, 2010

maths
Oops sorry! I realised that I also made a mistake near the end. When I said "...Therefore, 24x=98cm.." I meant 14x (Not 24!) = 98cm. =)
November 24, 2010

maths
Hi aisha, Let's start with formulating an algebriac expression for the perimeter. We know that perimeter of rectangle = 2(length) + 2(width). Since we don't know length or width, we let x be the width of the rectangle. Hence length = 5x-3 [because length = (5 X width...
November 24, 2010

chemistry
Hi Tara, Alright, by convention, we usually write [Oxidation]/[Reduction]in notation. Hence, the oxidation half-cell is the Cr/Cr3+ half-cell while the reduction half-cell is the Ni2+/Ni half-cell. [Alternatively, you can compare E(not) values such that the half-cell with the ...
November 24, 2010

chemistry
That comes from multiplying 3X10^-8 and 0.0385 when we expand 3X10^-8(0.0385-x).
November 23, 2010

chemistry
Hiya, From what you said it seems that you understand everything up till "x = [H+]= 3.4 x 10^-5 M" So we know that 3X10^-8 = x^2/(0.0385-x) Bring (0.0385-x) over to the left hand side, Hence 3X10^-8(0.0385-x) = x^2 Then we expand the left hand side, 1.155X10^-9 - ...
November 23, 2010

HUM176
Newspapers, once available only in print, have evolved into 24-hour multimedia operations. In addition to newspapers, briefly describe the evolution of movies, television, Internet, books and magazines, and media companies throughout the last century.
November 21, 2010

algebra
(6*5)/3 is this a true sentence
November 21, 2010

Probabilities
1.) two marbles are drawn without replacement from a bowl containing seven red, four blue, and nine yellow marbles. what is the probability that at least one is red? 2.)a card is drawn from a standard deck of 52 cards. what is the probability that the card is neither a four or...
November 9, 2010

Probabilities
1.) two marbles are drawn without replacement from a bowl containing seven red, four blue, and nine yellow marbles. what is the probability that at least one is red? 2.)a card is drawn from a standard deck of 52 cards. what is the probability that the card is neither a four or...
November 9, 2010

AP Chem
66 kJ/mol
November 7, 2010

chemistry
could someone please still explain? and explain how the 4.74 pH was found? thanks
November 7, 2010

chemistry
couple someone please still explain? and explain how the 4.74 pH was found? thanks
November 7, 2010

Social Studies
name if the following involve, seperation in powers, checks and balances, judicial review, federalism, or some combination of these principles, and say why A) the state law requires that a prayer be said each day in public schools. The courts rule that law wiolates a first ...
October 31, 2010

Calculus 2
I am having so many problems with these volume problems, 1. Find the volume of a the solid obtained by rotating the region enclosed by: x = 2y and y^3 = x with y>0 about the x axis 2.Find the volume of cone of height h = 250 and a circular base with radius r = 150 First ...
October 23, 2010

physics
A horizontal spring, resting on a frictionless tabletop, is stretched 14 from its unstretched configuration and a 1.00- mass is attached to it. The system is released from rest. A fraction of a second later, the spring finds itself compressed 3.6 from its unstretched ...
October 15, 2010

Social Studies
I need help making an MLA works cited. i have 3 sources... they are all newspaper articles that i found online. someone please help me
October 13, 2010

tangential speed and accelerations
A helicoptor bladehas an angular speed of 6.50 rev/s and has an angular acceleration of 1.30 rev/s. point 1 on the blade is 3.00m and point 2 is 6.7m. Can you find the speeds of A) the tangential speeds and B) the tangential accelerations?
October 12, 2010

physics
a truck is traveling to the right and slowing down. If we define a positive displacement to be motion to the right, the truck has...What Velocity and acceleration?
October 12, 2010

physics
What average power is required for a runner with a mass of 80 kg to reach a speed of 8.2 m/s during a time of 1.8 s?
October 10, 2010

chemistry
Lithium metal dissolves in water to yield hydrogen gas and aqueous lithium hydroxide. What is the final concentration of hydroxide ions when 5.500 g of lithium metal is dropped into 750. mL of water?
October 4, 2010

chemistry
You need to prepare 500.00 mL of a 0.25 M solution of nitric acid . Concentrated nitric acid comes from the chemical copmanies as a 15.8 M liquid. How much (in mL) of this 15.8 M solution will you need to dilute to 500.00 mL to get the desired 0.25 M solution?
October 4, 2010

english
Is this a better present tense sentence? I think education is a very important role in successful financial planning. And is THINK the verb?
September 29, 2010

english
Is this past perfect I had never studied financing until I signed up for college.
September 29, 2010

english
Would this sentence be past simple tense or past perfect tense? I learned how to create a financial plan and to budget money in my class.
September 29, 2010

english
What verb tense would this sentence be? I am learning so much about financial planning in my personal finance class.
September 29, 2010

English
Is this a present tense verb sentence? I believe education is a very important role in successful financial planning
September 29, 2010

English
what is the proper verb tense? With an education i will be able to find a better job?
September 29, 2010

college
what is the proper verb tense in the sentence below? With an education i will be able to find a better job?
September 29, 2010

college
I need to write 5 sentences showing the verb and its tense. The sentences need to be about the role of education in sucessful financial planning. I am so confused
September 29, 2010

College Physics
a horizontal speed of 15.8 m/s and a vertical speed 10.0 m/s upward. What is the vertical speed 1.12 s later?
September 26, 2010

algebra
solve for v: p = mv explain how to get the answer and what the answer is please
September 25, 2010

algebra
solve for d: s= d/t HELP EXPLAIN HOW TO DO THIS PLEASE
September 25, 2010

algebra
solve for m: F = ma someone tell me how to do this please!!!!!
September 25, 2010

algebra
will someone tell me what the answer is to this problem? and how they got the answer? SO CONFUSED solve for x: y = mx + b
September 25, 2010

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