Thursday
January 29, 2015

Posts by emma


Total # Posts: 1,235

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

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