Wednesday
May 4, 2016

# Posts by Claire

Total # Posts: 607

mah
factorise (5+9x-2x^2)/ ((x^2-6x+23)^ (5/2))
March 14, 2011

maths
Hi Can anyone help please: Suppose that the births of boys and girls can be modelled by rollling a fair die with 27 faces, 14 of which represent a boy and 13 represent a girl. 1. Using this model, choose the option that is closest to the probability that a couple who continue ...
March 14, 2011

physics
Surprisingly, very few athletes can jump more than 2.0 ft (0.62 m) straight up. Use d = 1/2 gt2 and solve for the time one spends moving upward in a 2.0 foot vertical jump. Then double it for the "hang-time" -- the time one's feet are off the ground.
March 1, 2011

maths
Can anyone help with te following please The total volume V(x)cm^3 of a container is given by V(x)= 4(x + ãx(8-x)) (<0x<8). Calculate the maximum possible volume of the container? The shape is two isoseles triangles but connected together to form the ...
February 22, 2011

maths
Can anyone help with te following please The total volume V(x)cm^3of a container is given by V(x)=4(x+ãx(8-x)) (<0x<8). Calculate the maximum possible volume of the container? regards Claire
February 21, 2011

Maths
Hi I am really sorry I now people have already attempted to help me with this one already, however I am still not able to understand, I really have not done a lot of these equations and am struggling. I have put a little more information down this time, any help is much ...
February 17, 2011

calculus maths
Hi can some one help, explain the following please. I seem to have issues with this: 1- Find the corresponding particular solution (in implicit form) that satisfies the initial; condition y = when x = 0. 2- Find the explicit form of this particular solution. 3- What is the ...
February 15, 2011

trig
find x in DMS if 2sinx-1=cscx
February 10, 2011

maths
Can any one help with the following please: Solve the initial-value problem: problem: dy/dx: 4(3cos(6x)-1)/1+2x-sin(6x) y=12 when x=0
February 8, 2011

Physics
I don't understand why the normal force is 9.4. If the object weighs 10 kg, the Fg in the y direction should be 92.1N, correct which would make the Fn 92.1N as well.
January 28, 2011

math
Working on exploring algebra: Whats the Rule I understand the rules of In and out but cannot find rule with variable? Do I make up my own because the in and out equations are all correct. Please help. Ex. In 2 out 6 rule is add 4 what is rule with variable?
January 24, 2011

RE
my homework for me im in year 7.... research the story from Joseph to Moses. design film poster for this story...
January 23, 2011

RE
how do i draw a film poster of joseph to moses....
January 23, 2011

French
I forgot to say, I'm using this with avoir. Like: Je les ai _____.
January 18, 2011

French
Hello, I'm just wondering how I would conjugate the verb "apporter" in the passe compose, to agree with gender and number? I know that in the passe compose, apporter becomes apporte (with an accent). But when it needs to be feminine, does it become aportee? And ...
January 18, 2011

Geometry helpp!!
Can anyone graph this please!!! 5. Perform these transformations on ∆TRL and compute the perimeter of the pre-image and final image. a. Rotate ∆TRL 180° about the origin and label the resulting image ∆T’ R’ L’. b. Reflect ∆T’ R&#...
January 12, 2011

Geometry helpp!!
Can anyone graph this please!!! 5. Perform these transformations on ∆TRL and compute the perimeter of the pre-image and final image. a. Rotate ∆TRL 180° about the origin and label the resulting image ∆T’ R’ L’. b. Reflect ∆T’ R&#...
January 12, 2011

Matrices
[0; x] = [-0.71 0.71; -0.71 -0.71][0.015; 0] + [-0.71 0.71; -0.71 -0.71][cos(y) -sin(y); sin(y) cos(y)][0.035; 0] I need to solve this matrix for x and y using Excel. Can someone tell me how to do it please?
December 18, 2010

Math
15. Eric has a straight garden path which is 2' x 15'. He wants to cover it with tiles that are each 1' x 2'.HOW MANY WAYS CAN HE DO THIS?
December 9, 2010

Math
Eric has a straight garden path which is 2' x 15'. He wants to cover it with tiles that are each 1' x 2'.How many ways can he do this?
December 9, 2010

math
114/18 sections is 6.333333' from post to post
December 8, 2010

Electrical Switches
What are the factors you consider when buying an electrical switch? I want to know what different people consider in order to obtain a good selection procedure. Thanks!
November 25, 2010

Physics
A 3.5 kg body accelerates from rest to 20 m/s in 5 s. Calculate: A its acceleration B the force required.
November 21, 2010

I need help answering questions to a case. The case is: Wagner V. Columbia Pictures Industries, Inc. I don't know if you can find this online or not. These are the questions I need help with: 1. How might the result of this case have been different if the court had ...
November 7, 2010

physics
a.) 1.65 m/s
November 4, 2010

Fluid Mechanics
A cylindrical tank 2m diameter and 4m long with its axis horizontal, is half filled with water and half filled with oil of density 800kg/m^3. Determine the magnitude and position of the net hydrostatic force on one end of the tank. The answers should be 27.9kN, 1.26m from the ...
November 3, 2010

Fluid Mechanics
A tank is 180cm long, 90cm deep and 90cm wide at the top, tapering to 30cm wide at the base. If the tank is completely filled with water, calculate: a) the total weight of the water in the tank b) The total force exerted by the water on the bottom c) The total force exerted on...
November 2, 2010

chemistry
the dissociation of molecular iodine into iodine atoms is represented as: I2 =2I Suppose that .0256 mole of I2 was placed in a 2.30 L flask at 1000K. what is the intial concentration of the I2 before any reaction occurs?
November 1, 2010

Fluid Mechanics
A closed tank, rectangular in plan with vertical sides, is 1.8m deep and contains water to a depth of 1.2m. The enclosed space above the water is pressurized with air up to 35kPa. If the length of one wall of the tank is 3m, determine the resultant force on this wall and the ...
October 31, 2010

Fluid Mechanics
A circular disc having a diameter of 125cm is immersed in water so that the distance of its perimeter measured vertically below the water surface varies between 60cm and 150cm. Find the total force due to the water acting on one side of the lamina, and the vertical distance of...
October 31, 2010

math
a low ha
October 27, 2010

Physics
A helicopter has two blades (see figure), each of which has a mass of 220 kg and can be approximated as a thin rod of length 6.7 m. The blades are rotating at an angular speed of 45 rad/s. (a) What is the total moment of inertia of the two blades about the axis of rotation? (a...
October 27, 2010

ok I did that and got x as 23 and y as 26 so when i use that against the three sites why are they not the same distance?
October 24, 2010

Ready Mix Concrete Company is planning on developing new markets in a growing community. It had recently acquired large orders in three locations: downtown, at a mall, and in a suburb. The destinations and loads to be delivered are the following: Delivery Site: Downtown ...
October 24, 2010

naming compounds
thanks:)
October 19, 2010

naming compounds
write the name of this compound:(charge) Pb(2+)Cl2 is lead(II)chloride so.. i just need to know if my answers correct. thanks:)
October 19, 2010

chem- ion
oh i got it!! nevermind.
October 19, 2010

chem- ion
naming chemical compounds. I don't really get how you get the symbol from the word or the other way around for polyotomic ions so.. here are some examples that a website gave me: this is wut the site said to do:(Its confusing to me) The name of the compound should have a ...
October 19, 2010

Chemistry
The U.S. Food and Drug Administration lists dichloromethane (CH2Cl2) and carbon tetrachloride (CCl4) among the many cancer-causing chlorinated organic compounds. what are the partial pressures of these substances in the vapor above a mixture containing 1.75 mol of CH2Cl2 and 1...
October 18, 2010

Maths
Solve for x: 5sin(2x) + cos(x) = -1.916 Can someone please show me the steps?
October 17, 2010

poems
I tried the iambic tetrameter type but i just couldn't find good enough words. But, i did try to make it follow a patttern(with each sentence starting with you and then a verb. Do you think it is better written now? Oh, picture in a picture frame. You write a story with ...
October 17, 2010

poems
for english class i have to write a poem personifying something. I chose to personify a picture in a picture frame. I am not at all good at poems and was wondering if you guys could read mine and tell me what changed i should make and if its really bad and i should just start...
October 17, 2010

personification poem
for english class i have to write a poem personifying something. I chose to personify a picture in a picture frame. I am not at all good at poems and was wondering if you guys could read mine and tell me what changed i should make and if its really bad and i should just start ...
October 16, 2010

Engineering Kinematic
The particle travels along the path defined by the parabola y=0.5(x^2). If the component of velocity along the x-axis is v=5t [m/s], determine the particle's distance from the origin and the magnitude of its acceleration when t=1s. The initial condition is t=0, x=0 and y=0...
October 16, 2010

science
how do I make a simple model cell?
October 11, 2010

re
how does the 'lords prayer' describe god.
October 9, 2010

Need help creating a monthly cash budget (hwk)
I started, but don't know if I'm going in the right direction: Here is the information on the sheet: Your carpet cleaning entrepreneurship: Supposed that your hometown is Petoskey, Michigan. After college graduation you decided to go into business for yourself because ...
October 2, 2010

Accounting help
I'm trying to make an income statement...for sales revenue out of this information what do I add up? Sales Revenue Forecast: June (actual) 24,000 July (actual) 20,000 August 28,000 September 52,000 October 44,000 November 76,000 December 96,000 January 22,000 February 32,...
September 25, 2010

September 17, 2010

I need help answering questions to a case that is in my business law book. The case is Granholm V. Heald and the questions are: What if the facts were different? Suppose that the states had only required the out-of-state wineries to obtain a special license that was readily ...
September 17, 2010

history
how did the romans built cities and showed us how to organize these?
September 14, 2010

college
what quantity x of a 65% acid solution must be mixed with a 20% solution to produce 300 mL of a 45% solution
September 2, 2010

math
Determine the x-intercept and y-intercept of 3x - 6y = 12.(Points : 2) (9, 0) and (0, -3) (4, 0) and (0, -2) (-4, 0) and (0, 4)
August 31, 2010

Inverse Functions & Trig. Equations
7. Evaluate sin[sin^-1(-1/2)]. a. 1/2 b. ð /6 c. -1/2 d. - ð /6 8. Evaluate cos[tan^-1(5/12)]. a. 12/13 b. 12/5 c. 5/12 d. 5/13 9. Evaluate cos[sin^-1(-3/5)]. a. -4/5 b. 5/4 c. 4/5 d. -3/4
August 7, 2010

trig
8. Write the equation for simple harmonic motion given that the amplitude is 5 centimeters and the frequency is 2/ ð cycles per second. Assume that the maximum displacement occurs when t = 0. a. y = 5sin4t b. y = 5cos2t c. y = 5cos4t d. y = 5sin2t 9. Write the equation for...
August 6, 2010

Thermodynamics
A turbine operating under steady flow conditions receives steam at the following state: pressure 13.8 bar, specific volume 0.143 m^3/kg, specific internal energy 2591kJ/kg and velocity 30m/s. The state of steam leaving the turbine is as follows: pressure 0.35 bar, specific ...
June 3, 2010

Electronics
How does a thyristor work when using ac voltage?
May 23, 2010

geography
The answer is A. Chinese Characters alone give no clue to the pronunciation.
May 8, 2010

chemistry
Given: H2 (g) + O2 (g) ⇌ H2O2 (g) K = 2.3 x 106 at 600 K 2 H2 (g) + O2 (g) ⇌ 2 H2O (g) K = 1.8 x 1037 at 600 K Calculate Gº for the following reaction: H2O (g) + 1/2 O2 (g) ⇌ H2O2 (g)
May 3, 2010

chemistry
In diatomic molecules of elements, the electronegativites of the two atoms are _________, so the electrons are shared ___________.
April 26, 2010

U.S. History
Who benefitted more from the compromise of 1850, the north or south?
April 20, 2010

Electronics
A series circuit consists of a 12V source, a 470ohm resistor(R1), a 330ohm resistor(R2) and a diode. If the diode is reverse biased, what is the value of V(R1) and V(R2)?
April 17, 2010

moments of inertia
I determined the area moment of inertia and the product of inertia of the cross-section of a beam about the centroidal axes using equations. I am now asked to design an experiment to verify the results that I obtained through equations. Can someone please suggest an experiment...
April 7, 2010

Chemistry
Thank you! That was very helpful. My final answer for the pH was 1.39. Is that correct?
March 31, 2010

Chemistry
At 300.K and 1.00 atm, assume that 25 mL of NO gas reacts with 22 mL of oxygen gas and excess water to produce nitric acid according to the following equation: 2NO(g)+(3/2)O2(g)+H2O(l)-->2HNO3(g) If all of the nitric acid produced by this reaction is dissolved into 25 mL of...
March 31, 2010

finance
A machine cost \$ 4,000. It lasts 2 years and has no scrap value (that is, it has no value at the end of those two years of use). In each year, it produces \$ 2400 in income. Should the firm invest in the machine if the interest rate is 10%? Should the firm invest in the machine...
March 28, 2010

Please check the following, thanks. First Syllable Accented Cancel Chamber Gather Tender Damage action Second Syllable Accented Frosty Mustang Convince Belief Behave Certain Remind Confuse Contain
March 26, 2010

science
How does the rainshadow effect happen?
March 23, 2010

ALGEBRA
Sqrt(x+3)+1-1=8-1 [sqrt(x+3)]square=7square x+3-3=49-3 x=46
March 23, 2010

Thermodynamics
a rigid vessel of volume 1m(^3) contains steam at 20bar and 400 degrees Celcius. The vessel is cooled until the steam is just dry saturated. Calculate the mass of steam in the vessel, the final pressure of the steam and the heat rejected during the process. The answers should ...
March 12, 2010

Incorrect comma usage?-
Thank you!
March 11, 2010

Incorrect comma usage?-
This begins with the titan Cronos’ mother, Earth, who encourages her children to overthrow their father, Heaven, because out of dislike, he keeps them locked away. does this look right?
March 11, 2010

Writing
I've had to change my paper a bit, because my professor wants it firmly based in the archaic age, but not directed to a particular polis. From what I understand, I should have a central idea (e.g. women were seen as inferior) that is directly represented within the texts, ...
March 10, 2010

Writing / Thesis help
Women in Archaic life and literature were viewed as a necessary evil. Opinions on this one?
March 10, 2010

Writing
Okay, I'm back. :) This is long, sorry! Here is the prompt: Explore the role of women in Archaic Greek society as presented in the literature examined in class. **You might consider how women were viewed relative to men, how they interacted with men, how women related to ...
March 10, 2010

Writing / History
Thank you! I'm going to stop by my uni's writing center tonight, and then I'll probably repost. :)
March 9, 2010

Writing / History
Help needed coming up with a specific thesis. Here is the prompt: Explore the role of women in Archaic Greek society as presented in the literature examined in class (The Iliad, Sappho's poems, Archilochus, and a book about Ancient Greece by Thomas Martin). **You might ...
March 9, 2010

Mechanics of Materials
Thanks a lot!! :)
March 6, 2010

Mechanics of Materials
A railroad is laid so that there is no stress in the rails at 20 degrees celcius. Calculate the stress in the rails at -6 degrees celcuis if all the contraction is prevented. Take E=206GPa and linear coefficient of expansion is 12 x 10^(-6) /deg celcius. If, however, there is ...
March 6, 2010

Why are people fearful & excited about Ellis Island?
March 1, 2010

math
The brightness of a light bulb varies inversely as the square of the distance from the source. If a light bulb has a brightness of 300 lumens at 2 ft, what will its brightness be at 10 ft?
February 8, 2010

math
The brightness of a light bulb varies inversely as the square of the distance from the source. If a light bulb has a brightness of 300 lumens at 2 ft, what will its brightness be at 10 ft?
February 8, 2010

Science
Photoperiod: a plants response to lenghths of daylight and darkness each dayy
February 8, 2010

trig
find all solutions of the equation tan(sq)x=1
February 8, 2010

MLA english question
My professor said "2) Be sure to footnote your writing when necessary. Of course you do not have to footnote general information, and the difference is not always to see! If you're in doubt, footnote a whole paragraph, or even one sentence. By the way, you may use ...
February 8, 2010

Maths
If z=(x^n) f(x/y), where f is an arbitrary function, show that: x(partial z/partial x) + y (partial z / partial y) = nz Can someone please show me how to work it out? Thanks!
February 3, 2010

Maths
If y is a function of x and z = e^z, show that: x (dy/dx) = (dy/dz) and (x^2) (d2y/dx2) = (d2y/dz2) - (dy/dz) I managed to work out the first part. But I don't know how to prove the second part. Can someone please show me how? Thanks!
February 3, 2010

trig
what is the exact value of 7pi for all trig func.?
February 1, 2010

Materials - Chemistry
Distinguish between the two main types of interstitial sites in metallic crystal lattices. Discuss the importance and potential uses of these sites. Can someone please tell me what are the two types? Thanks!
January 30, 2010

Maths
Find the value of theta: -810Cos(theta) + 135 + 2430 Sin(theta)Cos(theta) = 0 Can someone please show me how to simplify it to find the value of theta? Thanks!
January 26, 2010

Electricity
A 3-phase 50Hz, 8 pole induction motor has an effective stator to rotor turns ratio of 4:2, rotor resistance 0.2ohms and rotor standstill reactance 0.3ohms. Calculate the starting torque and maximum torque. At full load the slip is 0.08. Calculate the torque, mechanical output...
January 21, 2010

Electricity
RCL Circuits electricity!? A 50V, 50Hz supply is connected to a series circuit consisting of a resistance, a 20mH inductor and a capacitor. a) Find the value of the capacitance and the power dissipated in the circuit when: (i) The current has a magnitude of 25A and leads the ...
January 21, 2010

spelling
What is an analogy for the word fly that starts with the letters scr, spr, str and thr that has 4 letters?
January 14, 2010

Maths: Partial Differentiation
1) If x = rcos theta and y = r sin theta, show that partial r / partial x = cos theta and find partial theta / partial x. 2) If z = sin theta.sin phi.sin gamma, and z is calculated for the values theta = 30degrees, phi = 45 degrees and gamma = 60degrees, find approximately the...
January 9, 2010

Maths
Solve the differential equation: d2y/dx2 - 2 dy/dx + y = 3sinhx The answer should be: y(x) = e^x (Ax+ B) + ( 3^8 )(2[x^2][e^x] - [e^-x] ) Can someone please show me how to work it out?
November 30, 2009

Computer Programming
/* Develop a C program that will determine if a department store customer has exceeded the credit limit on a charge account. For each customer, the following facts are available: a) account number b) Balance at the beginning of the month c) Total of all items charged by this ...
November 22, 2009

Physics
e) Adjust the amplitude control of the function generator until the signal has a 6V peak-to-peak swing. The resultant form will have the following mathematical equation: v = Vm sin2(pi)ft = 3sing2(pi)500t f) The sinusoidal signal 3sin2(pi)500t has an effective value determined...
November 19, 2009

Biology
I read it wrong, phew. Thank you!
November 17, 2009

Biology
Okay, I need help. "If short hair (L) is dominant to long hair (l), then what fraction of the offspring produced by a cross of Llxll will be homozygous dominant? a) 1/2 b) 1/4 c) 1/3 d) none (no change of this offspring) The key says that it's d, but when I do the ...
November 17, 2009

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