Friday

December 19, 2014

December 19, 2014

Total # Posts: 525

**Applied Maths**

Given that position vector a=4i+2j, position vector b=13i+5j are the vectors of A and B respectively. Given also that C lies on the line AB such that (Ab/AC)=3. Find vector AB, vector AC and the position vector of C. Given that vector BD=2i+4j, show that D lies on the line AB ...
*October 20, 2008*

**Science Experiments**

ok, thank you
*October 15, 2008*

**Science Experiments**

Is the control of an experiment the part that is not changed?
*October 15, 2008*

**Math**

140/297 write fraction in simpest form
*October 12, 2008*

**Physics**

A solid iron cylinder of mass 0.2 kg is quickly transferred from inside boiling water in a beaker at 100 C into 90g of water at 15 C contained in a calorimeter of mass 150g and specific heat capacity equal to 800 J/kg/K. Find the final temperature of the water. (The Specific ...
*October 9, 2008*

**Maths**

Thanks a lot for your help!!
*October 8, 2008*

**Maths**

Thanks for your help! Could you please help me with the second problem because my answers are still not matching?
*October 8, 2008*

**Maths**

These questions are about permutations and combination: Find the number of ways in which a class of 20 children can be divided into two groups of 6 and 14 if the class has a set of twins who are inseperable. (ans. is 21624) Four books are taken from a shelf of 18 of which 6 ...
*October 8, 2008*

**spanish**

i need help unscrambling this sentence! clases / esta / tienes / que / tarde please help me! <3 claire
*October 7, 2008*

**math**

B is right. Since a binomial is the sum of two monomials.
*October 7, 2008*

**GBE (Genetics)**

What are the advatages of Eukaryotic genes splitting up? I'm not so sure how to approach the question, is it something to do with exons & introns or the nucleotide sequences?
*October 7, 2008*

**Algebra 2**

I know but it's not a "real" function or anything we have to graph, f(x) can be anything..so say it's f(x)=x^2 then it would be y=(-x^2-4)+6 so is it left 4 or right 4?
*October 6, 2008*

**Algebra 2**

I'm confused with this function y= f(-x-4)+6 I have to state what the function is doing, so i know it's a reflection over the y-axis, and you go up six, but with the 4 do i go right or left?? Thanks for any help!
*October 6, 2008*

**french**

At french cafes the seats outside are more expensive than the inside, Pont neuf (even though its translated as "new bridge") is actually the oldest bridge in paris. Napoleon's tomb is in a red coffin at l'hotel des invalids and that's all I can think of ...
*September 22, 2008*

**Math/Chemistry**

The density of water i 1.00 g/cm^3. Express this density in lb/ft^3. (1 lb = 454 grams)
*September 22, 2008*

**5th grade math**

625/1000 you do it by seeing how many digits are after the decimal point and you add that many zeros to one.
*September 22, 2008*

**math**

mystery number is 82.406 =)
*September 22, 2008*

**7th grade**

Why do scientists use the measure of light years?
*September 18, 2008*

**spanish**

Lilian no ______________llegar a la fiest. we must use the preterite tense of verb ( poder) can anyone help me thanks
*September 16, 2008*

**history**

what was the only city named in Palestine? One map shows Jerusalem and Jericho- -- one may shows Gaza - But the question only requires there to be one city Jerusalum, Jericho or Gaza
*September 9, 2008*

**history**

what was the only city named in Palestine? One map shows Jerusalem and Jericho- -- one may shows Gaza - But the question only requires there to be one city Jerusalum, Jericho or Gaza
*September 9, 2008*

**spanish**

etapa de la vida - how would this translate thanks
*September 8, 2008*

**Math**

What do the numbers ten eighty and 90 have in common thats unique?
*August 28, 2008*

**physics**

thank you so much. I suppose I did understand it, just looking at it from the wrong perspective.
*July 22, 2008*

**physics**

im apologize, i forgot to put the answer choices. They are: a. an unbalanced torque b. an unbalanced force c. its rotational inertia d. angular momentum This question really confuses me. Isn't it because the center of gravity for the ball is not over it's base support ...
*July 22, 2008*

**physics**

A ball rolls down a hill mainly because of: a. an unbalanced torque b. an unbalanced force c. its rotational inertia d. angular momentum I think it is d - but I am unsure. Any advice?
*July 22, 2008*

**physics**

You know that you can safely stand on the hang-over end of a heavy plank that rests on a table. How far depends on your mass and the mass of the plank. Suppose you can stand on the end of a plank that overhangs the edge of the supporting table 1/4 its total length. Then how ...
*July 22, 2008*

**physics**

It takes Pluto a longer time to travel around the sun than the Earth because Pluto: a. has farther to go b. goes slower c. a and b d. none of these
*July 22, 2008*

**physics**

The headlights, radio, and defroster fan in an automobile are connected in a. series with a switch for each. b. parallel with a switch for each. c. series without separate switches. d. parallel without separate switches. any help would be appreciated - thank you!
*July 21, 2008*

**physics**

An electron and a proton that are placed in an electrical field both accelerate equally. True or False?
*July 21, 2008*

**physics**

When 3 resistors of 1 ohm resistance each are connected in series to a 12 volt power supply, the total resistance of the circuit is _______ ohms. I really appreciate any help with this stuff - it's difficult for me! Thanks
*July 20, 2008*

**physics**

4 times bigger - so I think the answer would be 4 Newtons.
*July 20, 2008*

**physics**

Two charges separated by one meter exert 1 Newton forces on each other. If the magnitude of each charge is doubled, the force on each charge is ______ Newtons. Thanks!
*July 20, 2008*

**Philosophy**

Does anyone know any websites that have in depth answers to philosophy questions? I have to answer these: Why is the notion of control so important to Epitectus? In what senses would you call Epicurus a materialist? atomist? naturalist? Explain how Augustine attempts to ...
*July 20, 2008*

**physics**

The amount of energy dissipated by a 100-W bulb in a common parallel circuit ____________________. a. All of these. b. None of these. c. is normally 100 joules per second. depends on the voltage supplied to the lamp. d. depends on how long the bulb is lit.
*July 20, 2008*

**physics**

Charge polarization is normally produced by: nuclear interactions. contact. induction. friction. electrostatic means.
*July 19, 2008*

**MLA Help**

Are two spaces after a period required anymore?
*July 13, 2008*

**MLA Help**

I'm also scared that I've done my margins wrong. I've taken a look at my Holt Handbook about MLA formats but I'm still confused.
*July 13, 2008*

**MLA Help**

Can someone (preferably an english teacher) check my margins? This is the first time I've had to put an essay in true MLA format. He said that he wants the lines double spaced and a margin of 1 inch. However, I don't know whether I'm supposed to put a space between...
*July 13, 2008*

**English**

I'm supposed to write a first person narrative from the view of someone that shares a different one than me. p. 59 in New Millennium Reader if anyone has it. How long should it be? How should I start it off? I'm having trouble picking a topic and a view. Examples? Thanks.
*July 7, 2008*

**linear inequalities.**

The red arrow shows that all the values on the number line less than –3 are in the solution. The open circle at –3 shows us that –3 is not in the solution. Like this? Why is -3 not in the solution? How can I tell?
*June 4, 2008*

**linear inequalities.**

i'm having a lot of trouble figuring out when to use a closed or an open interval. do i use infinity in every question where both numbers are not defined? insight? thanks/
*June 4, 2008*

**NEED INFORMATION**

try searching it on google
*May 11, 2008*

**PHYSICAL SCIENCE**

DOES MOTION PRODUCE HEAT WE NEED TO ANSWER TRUE OR FALSE ON OUR HOMEWORK IF YOU RUN THAT IS MOTION WHICH MAKES YOU SWEAT THIS IS HEAT???
*April 22, 2008*

**Maths**

The answer is at the back of the book but I cannot understand how to get to that answer!
*April 4, 2008*

**Maths**

The tangent to the curve 2y= 2x^2 -5x +4 at the point where x=1 is parallel to the normal to the curve y= ax^2 + bx +10 at the point (-2,2). Calculate teh values of a and b. The answers are a=1, b=6
*April 4, 2008*

**algebra**

so the 4/4 comes from the original m? the way you did it is completely opposite from how i learned. i thought that i would subtract 1/4m and cancel that out, then subract 1/4 from m.
*April 3, 2008*

**algebra**

m-($50)9=1/4m the answer (m) is $600. what is the process for getting the answer?
*April 3, 2008*

**math**

How would I write the following quadratic function in standard form? The function is -(9x+2)^2+4x? What is the process for changing this to standard form?
*March 26, 2008*

**biology**

Is a starch molecule smaller or larger than an iodine molecule?
*March 26, 2008*

**French**

Could SraJMcGin please check this for me your really good. Thanks
*March 25, 2008*

**French**

Hi Mme. This is the last time i promise. I completely finished the poem but i just want you to give it one lat look i wasn't too certain about a few things. Here it is, thank you so much you have been amazing!! A Friend- Un ami (or is it une amie?) A smile in pain, - Un ...
*March 25, 2008*

**French**

Could someone please help me.
*March 25, 2008*

**French**

Merci Mme!! Sorry but i have another half of my poem could you correct it for me too! :) A hope when there's none there- un espoir quand tout est alle A path who will take you everywhere- Un chemin qui vous prendra partout. A hand to hold- Une main à tenir A person ...
*March 25, 2008*

**French**

I have a poem that i need to translate in french could you please assist me. A Friend- Un Ami A smile in pain- un sourire dans la douleur A cover from the rain- Une couverture de la pluie A shoulder to lean on- une epaule pour se pencher sur A person to depend on- une personne...
*March 25, 2008*

**Math / Percents**

What is the process to get this answer? Annie spends $600 a month on rent and makes $25,000 per year. To the nearest percent, what percent of her income does she spend on rent? Answer: 29%
*March 24, 2008*

**Physics**

Given that the Earth's radius is 6.37x10^6 m and taking the earth's gravitational field at its surface to be 9.81N/kg, find the gravitational potential at the Earth's surface.
*March 18, 2008*

**Fractions / math**

Okay, for these two questions I have the answers - but I can't figure out the process. HOW did they get these answers? 1. There are 132 members of the Volunteer Fire Dept. At a recent alarm, 1/4 of the volunteers responded. How many volunteers did NOT respond? Answer: 99 2...
*March 17, 2008*

**Maths**

thanks!
*March 17, 2008*

**Maths**

A circle C passes through the point (-12,9) and is given by the equation (x-a)^2 + (y-b)^2 = r^2. If the equation of the tangent to the given circle at the point (-4,1) is given by x-y+5=0, find the values of a,b and r. The answers have to be a=-8, b=5 r=5.657
*March 17, 2008*

**science**

223 RA arrow + 4 88 a 2 complete the following reaction
*February 8, 2008*

**science**

223 RA arrow + 4 88 a 2 complete the following reaction
*February 8, 2008*

**help huge test friday science**

I cant grasp half life - the study guide question is how is half life dating used by scientists - I have 2 lines to write an answer
*February 8, 2008*

**life science**

I cant grasp half life - the study guide question is how is half life dating used by scientists - I have 2 lines to write an answer
*February 7, 2008*

**Accounts**

I have a question and I need to prepare the final accounts. In the additional information one of the questions is as follows: Machinery is depriciated at 10% per annum using the Straight Line Method, whilst Computer Equipment is depreciated at 15% per annum using the Reducing ...
*February 1, 2008*

**physics SHM**

A particle is moving with SHM of period 16s and amplitude 10m. Find the speed of teh particle when it is 6.0m from its equilibrium position. First I found the value of w: w= 2 pi/ T = 2 pie/ 16 =0.393 s^-1 Then I used: v= +/- w root a^2 - x^2 = +/- 0.393 root 10^2 - 6^2 = 3.14...
*December 28, 2007*

**Maths Trigonometry**

Solve the following equation for 0<x<2Pi: (answer has to be in radians) sec (x + [pi/10]) =-5
*December 23, 2007*

**Maths**

Write down the equation whose roots are: i) two more than ii) the square of iii) three times as much as the roots of the equation 4x^2-x+2=0
*November 26, 2007*

**maths pls help**

I don't know. I simply cannot agree with the answers and I have tried to work them out many times
*November 21, 2007*

**maths pls help**

I still cannot work them out!!
*November 21, 2007*

**maths pls help**

1. Solve the following simultaneous equations: log2 xy = 7 log2 (x^2/y) = 5 2. If log y x =a and log z x=b where x is not equal to 1, express the following in terms of a and b: logy (yz) Solve the following simultaneous equations: y = 2 log3 x y+1 = log3 9x Thanks! I tried to ...
*November 21, 2007*

**Maths**

Resolve into partial fractions: (x+3)(x+1)/ x(x^2+x+1) Can anyone please help me out?
*November 15, 2007*

**Physics**

A string of length 50cm is used to hang a picture frame from a nail hammered on a smooth wall. The frame is 20 cm wide and weighs 10N. It hangs symetrically. The angle which each part of the string makes with the vertical is 23.6. - State the magnitude and direction of the ...
*November 2, 2007*

**maths logarithms**

Thanks! But how did you substitute 5z^2 for 5^2x+1?
*October 17, 2007*

**maths logarithms**

Solve this equation: 5^2x+1 + 24(5^x) = 5 The answer has to be -1 but I can't understand how to get this answer. Can someone please explain? Thanks!
*October 17, 2007*

**spanish**

it says use the following formula es/son (plus) de (plus) material or pattern model - estas botas/cuero = estas botas son de cuero este traje/lana i am not sure what to do
*October 16, 2007*

**spanish**

it says use the following formula es/son (plus) de (plus) material or pattern model - estas botas/cuero = estas botas son de cuero este traje/lana i am not sure what to do
*October 16, 2007*

**spanish**

el vestido de rayas de algodon are there two de ( i am not sure if the second one is correct)
*October 16, 2007*

**maths indices**

Simplify: (2x+3)^3/2 + (2x+3)^-1/2 / 2x+3 Can anyone explain how to work it out please? Thanks
*October 13, 2007*

**science**

are these correct as to physical and chemical 1. Heat pan. [P] 2. Melt butter. [P] 3. Crack desired number of eggs into a mixing bowl. [P] 4 Add milk to eggs. [P] 5 Add salt and pepper. [P] 6 Beat eggs, milk and seasonings. [P] 7 Add egg mixture to heated pan. [P] 8 Cook eggs...
*October 11, 2007*

**Maths**

Sorry those two symbols in front of the 3 and 2 have to be square roots!
*October 10, 2007*

**Maths**

Simplify the following: (ã3 - ã2)^2 The answer has to be 5-2 ã6 Can anyone please explain? Thanks
*October 10, 2007*

**Maths algebra**

Factorise the following: x^4 - x^3 - x^2 + x The answer is x(x+1)(x-1)^2 but I cannot understand how to get this answer. Can someone please show me the working? Thanks!
*October 10, 2007*

**science**

i suppose to make a simple reciepe with the steps showing to be either chemical or phsical
*October 10, 2007*

**science**

Which ones apply to a solution ? i thought it was 2,6,7 and 8 1. Does not settle on standing 2. scatters light 3. can seperate when allowed to stand 4. contains only fixed amts of components 5. Often appears cloudy 6. components do not lose their own properties 7. looks the ...
*October 6, 2007*

**science**

Which ones apply to a compound? i thought it was 4 and 6 1. Does not settle on standing 2. scatters light 3. can seperate when allowed to stand 4. contains only fixed amts of components 5. Often appears cloudy 6. components do not lose their own properties 7. looks the same ...
*October 6, 2007*

**science**

is salad dressing homogenous or hetrogenous ( the question says salad dressing it does not say oil & vinegar
*October 6, 2007*

**science one more**

Which ones apply to a heterogeneous mixture? I think only # 6 and 8 apply? 1. Does not settle on standing 2. scatters light 3. can seperate when allowed to stand 4. contains only fixed amts of components 5. Often appears cloudy 6. components do not lose their own properties 7...
*October 6, 2007*

**science thanks**

Which ones apply to a homogeneous mixture? I think only # 4 and 7 apply? 1. Does not settle on standing 2. scatters light 3. can seperate when allowed to stand 4. contains only fixed amts of components 5. Often appears cloudy 6. components do not lose their own properties 7. ...
*October 6, 2007*

**science thanks**

Which ones apply to a homogeneous mixture? I think only # 4 and 7 apply? 1. Does not settle on standing 2. scatters light 3. can seperate when allowed to stand 4. contains only fixed amts of components 5. Often appears cloudy 6. components do not lose their own properties 7. ...
*October 6, 2007*

**algebra**

First you open the brackets by multiplying each term in the first bracket by each term in the second one. So: (2x-5y) (x+y) 2x2 + 2xy -5xy -5y Collect like terms. Therefore it becomes: 2x2 -3xy - 5y
*September 19, 2007*

**Thanks**

Thank you so much for your help!
*September 18, 2007*

**technical design/maps/geography**

The scale of a map is 9mm represent 1km on real ground. I found the area of the map and it is 19990mm2. How am I going to use the scale to find the area of the real ground? Thanks a lot!
*September 18, 2007*

**Math**

The LCM is 240. To find their LCM all you need to do is divide the answers by prime numbers until you are left with either a 1 or a prime number which cannot be divided more. In the case of 30 you have 2,3,5. In the case of 48 you have 2,3,2,2,2. Then write like numbers ...
*September 18, 2007*

**math...help please!**

He is dividing by 2. You see half 120 is 60 and half 60 is 30. The next three numbers have to be 15, 7.5, 3.75. Hope it helped you!
*September 18, 2007*

**clarinet music**

I will be doing my clarinet practice exam grade 4 LCM next May and I am going to play "Pastoral" from the book "Four short pieces" by Howard Ferguson. I am trying to find this mp3 so as to feel more comfotable playing it with the piano. Can anyone send me ...
*September 5, 2007*

**irish**

i need to write a sentences in irish saying "I go to bed every night at half nine".
*September 5, 2007*

**Physics**

Simple Harmonic Motion With the equation x=Acos(2 pi f) t why and how does f affect x This is really urgent! Thanx for any help! frequency determines how rapidly x oscillates.
*May 17, 2007*

**Physics**

If you lay a steel needle horizontally on water, it will float. If you place the needle vertically into the water, it will sink. Explain why. Think about surface tension, and what causes it. I will be happy to critique your thinking.
*May 14, 2007*

**Finance**

I need help with this finance homework question PLEASE! Any help greatly appreciated! Your firm has been presented a leasing alternative on a new pizza dough machine. The annual lease payments would be $135m. Tax rate is 40%. The lease is for ten years. Determine the ATCFs for...
*April 25, 2007*

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