Wednesday

August 31, 2016
Total # Posts: 1,576

**Science**

I have some equations that I would like checked. Thanxs! 1. An automobile starts from rest and accelerates at 3m/s2 for 4 seconds. How fast is it going after acceleration? 3m/s^2 / 4 = .75 m/s 2. If an automobile travels at 30 km/hr. for 2 hours, how far does it go? d=(30 km/...
*August 26, 2007*

**maths**

how do i solve this equation? 2/(x+1)=1/(x-1) - (1/(2x-1)) thx Get a common denominator (x+1)(x-1)(2x-1) then, each term, multipy it out. Gather terms, solve.
*July 12, 2007*

**maths**

how do i solve this equation? 21(X-(1/7))^2= 3/7 thx Divide both sides by 21 Take the square root of both sides. Rewrite it as x - (1/7)= sqrt [(1/21)*(3/7)] = sqrt[(1/7)*(1/3)(1/7)] = (1/7) sqrt(1/3) x = (1/7)[1 + sqrt(1/3)] tahnks x=(2)/(7),0
*July 12, 2007*

**maths**

how do i factorise this?: p^2+2p+1-t^2 thx. p^2 + 2p + 1 - t^2 = (p+1)^2 - t^2 This is the difference of two squares, so it can be rewritten =(p+1+t)(p+1-t)
*July 11, 2007*

**Maths**

solve the following pair of simultaneous equation: (x/a)+(y/b)=1 (x/b)+(y/a)=1 can someone help please?i have no idea how to solve it =( x/(ab) + y/b^2 = 1/b x/(ab) + y/a^2 = 1/a Subtract one from the other y(1/b^2 - 1/a^2) = 1/b - 1/a y(1/b + 1/a)(1/b - 1/a) = (1/b - 1/a) ...
*July 11, 2007*

**maths**

each of the students in a class writes a dirrerent 2 digit number on the whiteboard. the teacher claims that no matter what the students write, there will be at least three numbers on the whiteboard whose digits have the same sum. what is the smallest number of students in the...
*July 7, 2007*

**ACCOUNTING**

#1 chin company incurred direct materials costs of $300,000 during the year. manufacturing overhead rate is 70%. how much are chin company total manufacturing costs for the year?
*July 6, 2007*

**maths**

five bales of hay are weighted two at a time in all possible combinations. the weights, in kilogrames, are: 110,12,113,114,115,116,117,118,120 and 121 what is the weight, in kilograms, of the heaviest bale? can someone please show me how to do this question?thx. Something is ...
*July 6, 2007*

**physics**

a gardener pushes a wheelbarrow. according to Newton's third law the barrow's reaction force on the gardener is the exact opposite of her force on the barrow. a bystander concludes the gardener and barrow will not move because they push equally against each other. how ...
*June 29, 2007*

**physics**

why are you more likely to have an accident on your bicycle if you are riding it on a gravel or wet pathway?how do i explain this using newton's law(s)? thanks consider newtons first law. Then, consider friction on the tire on gravel, wet vs dry pavement. isn't it ...
*June 29, 2007*

**Physics**

when you watch a cricket player catch the cricket ball, you will notice that he allows his hands to trace the path of the ball as it reaches him what is the physics principles behind this? and baseball catching is different, as the catcher moves towards the ball often with his...
*June 28, 2007*

**Physics**

In the game of netball, players often move quickly and then come to a sudden stop. how does the abrupt nature of the game relate of the knee injuries netball players frequently suffer? thanks IT sesms to me that abrupt stopping (the feet stop first, and then the knee ligaments...
*June 28, 2007*

**Cannabis**

What are the reasons for legalising cannabis? One of the most popular arguments centers around medical purposes, even if for no other uses. http://www.drugwarfacts.org/medicalm.htm http://news.bbc.co.uk/1/hi/uk/1869897.stm (Broken Link Removed) Of course, there are arguments ...
*June 26, 2007*

**math**

write 64 as a product of 2's what do i do??? factor 64 into product of twos. 2*2*2=8, that ought to get you started.
*June 18, 2007*

**math**

what does "write 81 as a product of 3's" mean? what do i do? 3*3=9. That ought to get you started.
*June 18, 2007*

**math**

what does "write 81 as a product of 3's" mean? what do i do? 3 to the 4th power, which can be written 3^4 or 3x3x3x3, equals 81.
*June 18, 2007*

**physics**

In late 2001, steve Fossett tried to fly a balloon nonstop around the world . why on his attempted circumnavigation of the globe did Steve attempted to travel at an altitude of approximately 10000 m? That is a typical stratosphere flight altitude, where the pilot can usually ...
*June 16, 2007*

**physics**

in Melbourne there used to be a huge shopping centre called "diamaru" built around an old "shot tower". hot lead globules were poured from the top of the tower which fell into a large pool of water at the foot of the tower. in this way spherical lead shot ...
*June 15, 2007*

**child care**

why is it important to choose appropriate play provision for a child? (please help i am very stuck and my assigment is due in tomorrow) Young children learn by playing. They develop large and small motor skills, intellectual knowledge, social adaptation, and information about ...
*June 12, 2007*

**child care**

how does poverty affect the growth and develpment to children Please try some reading here: http://www.google.com/search?as_q=children+poverty&hl=en&num=10&btnG=Google+Search&as_epq=&as_oq=&as_eq=&lr=&as_ft=i&as_filetype=&as_qdr=all&as_nlo=&as_nhi=&as_occt=title&as_dt=i&...
*June 7, 2007*

**spanish**

I have to fill in the gap with an adjective and i am really stuck on these questions: 1)Es........asomarse a la ventanilla 2)Carmen está...... le duele la cabeza 3) En la mano ......... llevo dinero, y en la no llevo nada. 4)Qué olor! El pescado no esta Pleas ...
*June 4, 2007*

**social studies**

What are some problems or controversies regarding the use of the mineral silver? Check this article for the many uses of silver, including in alternative medicine. http://en.wikipedia.org/wiki/Silver#Folklore_and_mass_culture
*May 31, 2007*

**social studies**

How is silver harvested in Australia? Silver is not "harvested." It's "mined." http://www.google.com/search?q=australia+mining+silver&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA
*May 31, 2007*

**social studies**

Who manages the natural resources of Australia? http://www.google.com/search?q=australia+manager+natural+resources&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA =)
*May 31, 2007*

**maths(urgent)thanks.**

a parabola with turning point at (1,-2) and passing through the origin.find the equation of this parabola. how do i do this? can someone please show me how to solve it step by step?thanks! You know that at x = 0 the function is zero. Because the turning point is at x = 1 must ...
*May 30, 2007*

**maths help needed!(urgent)**

find the equation of the tangent to y=x-(a^3/x^2) at the point (a,0) how to i work this out??can someone please show me how to do it step by step?thanks!!! Take the dervative of y y= x- a^3 x^-2 y'=1+2a^3/x^3 so the equation for the tangent is y= mx + b where m is y' ...
*May 30, 2007*

**Math again**

Rearrange to give d in terms of e: (3d-7)/(4+5d) = e I got 3d - 5de = 4e + 7 but where do I go from there? Thanks :) 1st you must Multiply the polynomial. Please try the tutorial at the following site: http://www.webmath.com/polymult.html
*May 28, 2007*

**Maaaath**

6/x + 6/x-5 = 1 I got to x^2 -17x +5 = 0 But I have no idea if that is right? How do I find the answer? Thanks 6/x 6/x-5 =1 multiply both sides by x x(6/x +6/x-5)= (1) x The denominator x will cancel giving: 6 + 6 --- = x -5 Now -5 into 6 = -1.2 so 6 -1.2= x x= 4.8
*May 28, 2007*

**chemistry**

which of the following compounds contains the lowest percentage by mass of nitrogen? 1) NH4NO3 2) (NH4)2 SO4 3) NaNO3 4) NH3 can someone please help me??what method should i use?how do i do this? Find the molar mass of each compound by adding the molar masses of every atom (...
*May 27, 2007*

**chemistry**

liquids such as ethanol have a greater vapour pressure than water for any given temperature. comment on the strength of the intermolecular forces in ethanol compared to water.
*May 27, 2007*

**maths**

a ball is dropped from a height of 40cm onto a horizontal surface and bounces in a vertical line until it eventually stops on the surface. the ball bounces in such a way that it loses ten percent of its height for each bounce and will continue to do this until it comes to rest...
*May 25, 2007*

**differentiation**

by determining : lim f(x+h)-f(x) h->0 --------------- h show that if f(x)=2x^2+2 then dy/dx=4x. i figured out that f'(x) is 4x...but i am confused about what to do next...someone help? "i figured out that f'(x) is 4x..." That's the answer! dy/dx is ...
*May 25, 2007*

**function**

consider the function g(x)=x^3+5x^2-4x+4.determine: 1)g(37) 2)the value of x between zero and a hundred such that g(x)=145456 how do i do this? 1) put in 37 for x, and compute. 2) put in 145456 in for g(x), and solve for x. for the first one, just substitute 37 for x and ...
*May 25, 2007*

**maths please check**

a yacht is sailing at a speed of 12 knots due south in calm water. if the tacht encounters a current of 4 knots from bearing 040 degrees: determine the resultant speed and direction of the yacht. here is my answers: 15.28 knots from bearing 9.69 degrees.am i right? thanks. ...
*May 25, 2007*

**maths**

how do i find out the the equation of the line of symmetry for f(x)=ax^2+bx+c ? please explain it do me thanks! The line of symmetry runs through the vertex. so the x of the vertex is -b/(2a) and the equation of the line of symmetry is x = -b/(2a) e.g. for f(x) = 2x^2 - 12x + ...
*May 25, 2007*

**parabolas**

how do i find the equaion of the following parabolas? 1)intercepts at (2,0),(8,0) and (0,48) 2)turning point at (1,-2) and passing through the origin. can someone please teach me how to do this??thanks! The first: Write you standard equation of a parabola (it has two x ...
*May 20, 2007*

**maths**

f(x)=x^3+px^2+qx+6 this formula can also be written in "factorised form" that is, f(x)=a(x+b)(x+c)(x+d) can someone please teach me how to change a funtion into it's factorised form? thanks the following link has some nice step-by-steps illustrations and examples...
*May 18, 2007*

**intro cal**

the first 3 term of a geometric progression are k-4, 2k-4, 4k+4. what is the value of k? can someone help please! in any geometric progression any term divided by its previous term gives you the common ratio, so .... (2k-4)/(k-4) = (4k+4)/(2k-4) cross-multiply and proceed. I ...
*May 18, 2007*

**physics**

in different parts of a car air conditioner a liquid changes to a gas and a gas changes to a liquid. a)which of these changes causes the cooling?why? b)describe how the air conditioner removes heat from the car's cabin. can someone please help??thank you so much! it takes ...
*May 14, 2007*

**physics**

at a picnic a frind asks you for advice about cooling his warm bottle of soft drink.he can submerge the bottle in a bucket of water, or wrap the bottle in a cloth and then wet it with the water from the bucket.which should he do? i think the first option is right. but i can&#...
*May 14, 2007*

**physics-please check**

is this right?: when a form of energy changes from one form to another some energy may transfrm into a useful form, those useful form of energy is high grade energy.while the rest of the energy will always change to form we cannot use.which is called the low grade energy. if i...
*May 14, 2007*

**physics-energy conservation**

a mordern power station,or, more correctly, an energy station, converts heat energy into electrical energy at an efficiency od 50% if the station produces electrical energy at a rate of 1.00GW from burning coal, calculate the mass of coal it burns each day. the coal it uses ...
*May 9, 2007*

**physics**

jack measured that his racquet gives a squash ball 45.0J of kinetic energy when he hits it with a particilar shot.he also measures that it has 18.0J of kinetic energy after one bounce off the court wall. what percentage of its mechanical energy does the ball lose while it ...
*May 8, 2007*

**physics**

when a power station converts chemical or nuclear energy to electrical energy it converts about 50% of the energy to low grade heat suggest how people could use this energy before the power station operators allow it to enter the environment. why is this low grade heat energy ...
*May 8, 2007*

**physics-energy conservation**

some people refer to heat as "low grade energy. a)how is low grade energy different from high grade energy? b)give two example of high grade energy When heating a cup of tea, which would be preferable...a stove with a burner on top, or a heating pad? High grade energy is ...
*May 8, 2007*

**physics-energy conservation**

when you apply the brakes of a car its kinetic energy or energy of motion decreases. a)to what form of energy is the kinetic energy converted? b)where does the resulting energy end up? Do the brake drums on the wheels heat up? so does it convert into heat energy?and the ...
*May 8, 2007*

**Science**

Give examples of parasitism, mutualism and commensalism.
*May 6, 2007*

**physics**

why does an heater with a fan is more efficient than a similar heater that doesn't have a fan? It distributes the heat throughout the space (room) that is being heated.
*May 4, 2007*

**physics-heat transfer**

energy conscious homeowners often insulate their homes. one form of insulation is thick pads of loosely packed glass fibres.explain how these pads reduce heat transfer. how do thick curtains help reduce heat loss from the windows of a house? builders often insulate parts of ...
*May 4, 2007*

**physics-heat transfer**

consider a brick wall that has been exposed to the sun for some time. 1.how did the heat get from the sun's surface to the wall?(is it something about radiation?please help.) 2.the air over the wall seems to shimmer and shake as air currents rise from it.explain what ...
*May 4, 2007*

**Biology**

How is the eartworm's digestive system adapted for extracting relatively smal amounts of food from large amounts of ingested soil http://www.google.com/search?hl=en&as_qdr=all&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=+%22earthworm%27s+digestive+system+%22&spell=1
*April 22, 2007*

**Math**

You can write the equation y=x+4 in different ways. Which of these is correct ? x+y=4 x=4+y y-x=4 y+4=x x=y-4 There could be a couple of ways ... Please help I do not have a clue on this. I will be very greatful if you could help in the next 30 mins xxxx why don't you pick...
*April 18, 2007*

**MATH**

X=0
*March 21, 2007*

**post World War II**

Discuss the effets of World War II; historians and other scholars have commonly spoken of "postwar American society." How was society diffrent after the war that before? Were there changes all direct or indirect results of the war, or would many have occurred without...
*February 22, 2007*

**Bible - Amos**

Hi, I'm in a social studies class and we're studying the Bible, which I have trouble comprehending. I need to write on why Amos chose to single out the "cows of Bashan" as his scorn subjects. Would this be because women appeared to be the main cause of ...
*February 10, 2007*

**Oedipus**

Hi! I have a paper on Oedipus as a character of "appalling greatness." Is this how the audience for which Sophocles wrote the play would see him, or is it a "modern misinterpretation?" and This critic has argued "Oedipus" has the most impact of ...
*February 10, 2007*

**egypt mummification**

Thanks for the answers they worked out perfectly
*February 8, 2007*

**egypt mummification**

Holy effin crap that is the excact friggin paper im workinon! seriously u copied it down word for word! and it is called the mummification process. mine has a stupid work puzzle at the bottom!!!!!!! im in new york ya im in sixth grade 2!!! :)
*February 8, 2007*

**precalc**

If g(x = log subscript 7 x then what is the value of g(1/49)? I believe it's 1/2 but I'm not sure. no recall that log 1/49 (base7) = log 1 - log 49 = 0 - 2 =-2
*January 13, 2007*

**pre calculus**

I believe that the domain for f(x) = log subscript 3 (1-x) is x is a real number I think the range for the same equation is y > 1 . the domain of log (1-x) would be such that 1-x > 0 -x>-1 x < 1 whereas the range would be y is any real number Have you considered ...
*January 13, 2007*

**pre-calculus**

I posted a problem earlier and made a mistake the question is what is the domain and range of f(x)= log subscript 3 (1-x)? Sorry! The answer is the same. The domain and range will be the same as if it were log base 40.
*January 13, 2007*

**pre-calculus**

What is the base of the function F(x) = b to the power of x if the graph has points of (1/3, 2)and another off the subject one if g(x)= log 7 x what is g(1/49)? If F(x) = 2 when x = 1/3, and if the fucntio is of the form F(x) = b^x, then 2 = b^(1/3) Cube both sides of the ...
*January 13, 2007*

**pre-calculus**

What is the domain and range of log3 (1-x)? I will be happy to critique your thinking. To assist you, consider log (-4) log (0) log 25 Those are to the base 10, changing to another base just changes the numbers, not the function.
*January 13, 2007*

**Geography**

what is the clue to the word going down it dunt make sense t meeh x Its the same as ur al on bwt x
*January 2, 2007*

**english**

"Injustice anywhere is a threat to justice everywhere" what does this mean? Someone explain it plz. I think it means that if there is no justice or no fairness in a certain place, makes others think that doing the same thing is okay. thanx.
*December 14, 2006*

**the big idea of energy**

it is what goes through a food chain
*December 5, 2006*

**Watershed?**

Seriously, I thought they were supposed to give us a link to this info? FLVS is so lame.
*November 1, 2006*

**history**

How did Jeffersonian Democracy hope to remove obstacles to upward social mobility? How is it different from Jacksonian Democracy? Jeffersonian Democracy: http://en.wikipedia.org/wiki/Jeffersonian_democracy and http://www.answers.com/topic/jeffersonian-democracy Jacksonian ...
*October 7, 2006*

**sci**

would you consider an animal, like lion on top of the food chain, or the very bottom? ya never know what's out there... but ya, personally i'd consider lions at the top of the food chain. The food chain is determined by who eats whom. At the top of the food chain, that...
*October 4, 2006*

**sci**

would you consider an animal, like lion on top of the food chain, or the very bottom? on the top... Lion------>Zebra----->Grass
*October 4, 2006*

**english- mood/tone**

i like amys answer
*September 24, 2006*

**pronouns/nouns**

What is the nouns in this sentences "Mercury is the planet nearest the sun"
*September 5, 2006*

**making dot arrays**

what do you call them?
*August 21, 2006*

**eth 125**

Hey thanks for the help!!! I just stumbled upon this site by accident!!! I see a lot of my classmates fond it also
*July 20, 2006*

**NVQ level 3 buisness admin**

ok im really struggling on the questions on unit 314 hy the hell is there no question marks i have to anwser them like questions,its confusing me?? please can anyone shed a light over my way please.x cheers ema We don't have access to NVQ questions. Please post one or two ...
*June 12, 2006*

**unscrambling word**

Can you help me unscramble these words please! radmordey conshorier trinabac mecal minglem bobing lukarak its in spanish- srecmoro, and tsmnoamo- help please england antelope is the answer tyler! lafrpty=flytrap lafrpty=flytrap please help me to unscramble this saying! dare to...
*June 14, 2005*