Tuesday

January 24, 2017
Total # Posts: 675

**Chemistry**

Would water-insoluble alcohols, like 1-octanol, be soluble in aqueuous NaOH?

*May 15, 2012*

**6th grade math**

Please check to make sure I did these correctly, so confusing. Thank you. Rename each fraction as a terminating or repeating decimal 13/20 .65 1/3 0.3333333333333333 2/9 0.2222222222222222 5/12 0.4166666666666667 1/16 0.0625 Rename each mixed number as a terminating or ...

*May 13, 2012*

**algebra**

If you need 3 pounds of fertilizer for 100 square feet of soil, how much do you need for 4 sq.ft.; 6 sq.ft.; 8 sq.ft.?

*March 23, 2012*

**Algebra**

Explain the ways to factor ax^2+bx+c=0 and show examples. Thanks!

*March 21, 2012*

**math**

If a 4'x4' area equals 20% of the whole what is the size of the whole?

*March 20, 2012*

**Spanish**

Please could somebody explain the difference between tan como and tanto como?

*February 21, 2012*

**algebra**

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)

*February 3, 2012*

**physics**

Three charged particles are placed at the corners of an equilateral triangle of side d = 1.40 m (Fig. 16-53). The charges are Q1 = +4.0 µC, Q2 = -7.0 µC, and Q3 = -6.0 µC. Calculate the magnitude and direction of the net force on each due to the other two.

*January 30, 2012*

**physics**

You have three identical charged spheres, each with a charge of 2.80 µC. You have arranged them so they are each at the corners of a square that measures 4m on a side. Find the magnitude of the electric field at the "empty" corner. (The corner with no charged ...

*January 30, 2012*

**physics**

You have three identical charged spheres, each with a charge of 2.80 µC. You have arranged them so they are each at the corners of a square that measures 4m on a side. Find the magnitude of the electric field at the "empty" corner. (The corner with no charged ...

*January 30, 2012*

**Physics**

Directly below on the floor is a stationary 428-Hz source of sound. The microphone vibrates up and down in simple harmonic motion with a period of 2.3 s. The difference between the maximum and minimum sound frequencies detected by the microphone is 2.2 Hz. Ignoring any ...

*January 29, 2012*

**trig**

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x)= secx i(x)= cscx

*January 19, 2012*

**trig**

I don't know to find the derivative of the following trig functions. Please help. f(x)= cotx h(x0= secx i(x)= cscx

*January 19, 2012*

**calculus**

Plain θ miles

*January 19, 2012*

**calculus**

An airplane flies at an altitude of 5mies toward a point directly over an observer. The speed of the plain is 600 miles per hour. Find the rate at which the angle of elevation thetha is changing when the angle is 75 degrees. Please help with this question.

*January 19, 2012*

**Geometry Question (multiple choice)!**

The isosceles trapezoid is part of an isosceles triangle with a 34° vertex angle. What is the measure of an acute base angle of the trapezoid? Of an obtuse angle? 73°; 107° 34°; 146° 73°; 146° 34°; 107° Thank you =) :) ;)

*January 10, 2012*

**math**

37 + (-12) =

*January 6, 2012*

**Materials Degradation**

1) With reference to electrochemical corrosion, explain the following phenomena: i) Anodic Polarization ii) Cathodic Polarization 2) What are two degradation mechanisms that are the responsible for the loss in molecular weight of polymeric materials?

*December 31, 2011*

**physics**

yep and then you do the sqrt( -29.9^2 +98.2^2) to get the velocity

*December 14, 2011*

**physics**

The velocity of an airplane with respect to the ground is 200 m/s at an angle of 30 degrees NORTH of EAST. The velocity of the airplane with respect to the air is 150 m/s at an angle of 60 degrees NORTH of EAST. What is the velocity of the air with respect to the ground?

*December 14, 2011*

**PreAlgebra**

A scale drawing of a town park has a scale of 1 inch : 100 feet. What is the actual length for each 1 foot on the drawing? Thanks!

*December 12, 2011*

**Physics**

What type of reaction is CS2(g)+O2(g)= CO2(g)+S2O4(aq)+HEAT? A) Synthesis B) Decomposition C) Single Replacement D) Double Replacement E) Combustion F) Redox Reaction Thank You ^_^/ I really appreciate it!

*December 7, 2011*

**chem 121**

Iron and oxide react to form iron(lll) oxide: 4Fe(s) + 3O2(g)+ 2FeO2(s) Determine the limiting reactant in each of the following mixtures of reactants: 2.0 moles of Fe and 6.0 moles of O2

*November 18, 2011*

**Materials Engineering**

Can someone please tell me what material is used for the an electric window switch (the part that the driver presses)?

*November 8, 2011*

**Physics**

In Figure 10-20, the magnitude of the force necessary to stretch a spring is plotted against the distance the spring is stretched. Figure 10-20 (a) Calculate the slope of the graph, k, and show that F = kd, where k = 25 N/m. (b) Find the amount of work done in stretching the ...

*October 25, 2011*

**Chemistry 121**

What is the lewis dot structure of C2H5F?

*October 21, 2011*

**Physics**

79.49

*September 25, 2011*

**math riddles**

b vc

*September 17, 2011*

**math riddles**

what was the truck driver doing with a load of hogs?

*September 17, 2011*

**Geometry**

Find the distance between points (-2,1) and (1,5) When finding the distance between these 2 points would you subtract 1-(-2) or -2-1? The same question with the other one as well.

*August 22, 2011*

**6th grade math**

I don't get what you said at the end.

*August 22, 2011*

**6th grade math**

Estamate each sum or diffrence by rounding to the greatest place value. 998,927-100,724 would the answer be 1,000,000-100,000=900,000 Thank you for helping me on my homework!

*August 22, 2011*

**6th grade math**

what does it round to then? is it 100,000?

*August 22, 2011*

**6th grade math**

Estamate each sum or diffrence by rounding to the greatest place value. 998,927-100,724 would the answer be 1,000,000-200,000=800,000 :)

*August 22, 2011*

**6th grade math**

what kind of tuter puts lol?

*August 22, 2011*

**6th grade math**

IS THAT TRUE??????????

*August 22, 2011*

**6th grade math**

LOL

*August 22, 2011*

**6th grade math**

who r u?

*August 22, 2011*

**6th grade math**

Estamate the sum or diffrence by rounding to the greatest place value. 639,069+283,136 Would it be 600,000+300,000=900,000

*August 22, 2011*

**6th gr,ade math**

Estimate each sum or difference by rounding to the greatst place value. 38,347+17,039 would it be 40,000+20,000=60,000

*August 22, 2011*

**6th Grade Math**

Estimate each sum or difference by rounding to the greatest place value. 10,982+4,821= should the answer be... 11,000+5,000=16,000 or 10,000+5,000=15,000

*August 22, 2011*

**Economics/ Free Enterprise**

I'll definitely try getting straight to the point now (:

*August 17, 2011*

**Economics/ Free Enterprise**

Haha I know! But it seems that I never type in the right stuff that'll come with answers I can understand (: This website is so much more helpful.

*August 17, 2011*

**Economics/ Free Enterprise**

Thank you!!!

*August 17, 2011*

**Economics/ Free Enterprise**

What does thinking at the margin mean? Also what is the purpose of a decision grid?

*August 17, 2011*

**Science**

Were can i find a coloured diagram of a aluminum-nickel electrochemical cell?

*July 15, 2011*

**english**

what does earth look like,sounds like,taste like,smell like,feel like...

*July 3, 2011*

**english**

any planet would be ok... how can i describe a planet trying to use the 5 senses?...

*July 3, 2011*

**english**

describe the surface of a planet using the 5 senses (year 7)....

*July 3, 2011*

**chemistry**

this does not give the answer

*June 21, 2011*

**chemistry**

is there any way i can see an answer for this.. i have it as an a level chemistry question and im either having a mental block... or totallyyy don't get it ?

*June 21, 2011*

**science**

A block of mass 0.5 kg is pushed a distance x against a spring with k=450 N/m. When released the block slides along a frictionless horizontal surface to a point B, the bottom of a vertical circular track of radius R=1 meter. The track is not smooth. When the block reaches ...

*June 18, 2011*

**history**

who was john ball and his conection to the peasents.data...

*June 14, 2011*

**history**

Thank You....

*June 14, 2011*

**history**

who was john ball and his connection to the peasants data (1381)....

*June 14, 2011*

**calculus**

Sorry to post this again, but I am still unable to understand it and need help. Please help.1) Using 3(x-3)(x^2-6x+23)^2 as the answer to differentiating f(x)=(x^2-6x+23)^3/2, which I have been able to do, I need to find the general solution of the differential equation dy/dx...

*May 22, 2011*

**Maths**

How can answer this question ,help please? Information: A ship travels at a constant speed of 25 kilometres per hour (Kph) in a straight line from port A located at position (x_A, y_A) =(-100, -100) to port B at (x_B ,y_B )=(300 ,100) During its journey ,the ship passes two ...

*May 5, 2011*

**Maths**

Find the particular solution of the differential equation from: dy/dx = 2/27(x-3)ã(x^2-6x+23) / (y) (y>0. For which y=2 when x =1, and then give this particular solution in explicit form. regards Claire

*April 6, 2011*

**Maths**

Hi Please can you help? Really sorry for repeating the question but I wrote it incorrect before. Find the particular solution of the differential equation from dy/dx=2/27(x-3)ã(x^2-6x+23) / (y) (y>0. for which y = 2 when x = 1, and then give this particular ...

*April 4, 2011*

**maths**

Hi Please can you help? Find the particular solution of the differential equation from dy/dx=2/27(x-3)ã(x^2-6x+23) / (y) (y>0. for which y = 2 when x = 1, and then give this particular solution in explicit form? thank you in advance for any help regards Claire

*March 30, 2011*

**maths**

Hi Please can you help Find the particular solution of the differential equation from f(x)=(x^2-6x+23)^(3/2)for which y=2 when x = 1, and then give this particular solution in explicit form? Am I correct that the following is the explicit form (not confident). 2^2=(4/81)(1^2-6...

*March 30, 2011*

**maths**

Looking for some guidance please, I need to find the initial-value problem for dy/dx = 1+2cos^2x / y. y = 1 when x = 0. any help is much appricated

*March 25, 2011*

**science**

answer please

*March 23, 2011*

**science**

also one of the tyres has a slow puncture and the air pressure in the tyre falls. what happens to the area of tyre in contact with the road?

*March 23, 2011*

**science**

john has a bike when john gets on the bike, the force on each tyre increases. what happens to the area of tyre in contact with the road?

*March 23, 2011*

**maths**

Hi Looking for some guidance please, I need to find the initial-value problem for dy/dx = 1+2cos^2x / y. y = 1 when x = 0. any help is much appricated regards CLAIRE

*March 22, 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 16, 2011*

**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*

**Business law**

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*