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2008
April

Questions Asked on April 26, 2008

if it takes 31,500 joules of heat to warm 750g of water, what was the temperature change?My answer: Q = (M) (DeltaT) (c) Delta
1. 3 answers
2. asked by sam
3. 6,200 views
A solution of lithium chloride in water has a mole fraction of 0.0500 in LiCl. What is the molality?Mole fraction = moles of
1. 1 answer
2. asked by Ginger
3. 3,261 views
There are 8 singers competing at a talent show. In how many different orders can the singer appear?
1. 1 answer
2. asked by kevin
3. 2,872 views
a sample of air has a volume of 140.0 mL a 67 degrees C. at what temperature would its volume be 50.0 mL at constant pressure/
1. 4 answers
2. asked by Gion
3. 2,181 views
a car of mass 1360 kg descends from a hill of height 86 m at a constant speed of 20 km/h. assuming that all the
1. 2 answers
2. asked by kelsee
3. 2,005 views
What is the pH of a solution prepared by diluting 25.00mL of 0.020M barium hydroxide to a volume of 100.00mL?
1. 2 answers
2. asked by Ginger
3. 1,898 views
the position function of a particle is given bys=t^3–4t^2–7t t>=0 where s is measured in meters and t in seconds. When does
1. 2 answers
2. asked by Adam
3. 1,759 views
A school has 6th, 7th and 8th period Social Studies classes. One student from each class will be chosen to represent the school
1. 1 answer
2. asked by kevin
3. 1,607 views
An owl has good night vision because its eyes can detect a light intensity as small as 5.0*10^-13W/M^2. What is the minimum
1. 1 answer
2. asked by Stephy
3. 1,513 views
Explain how redioactive decay has always warmed the Earth from the inside and how nuclear fusion has always warmed the Earth
1. 1 answer
2. asked by Rob
3. 1,505 views
Why do we consider a business-cycle expansion different from long-run economic growth?Why do we care about the size of the
1. 2 answers
2. asked by smeffy
3. 1,461 views
Compressed air can be pumped underground into huge caverns as a form of energy storage. The volume of a cavern is 5.60 105 m3,
1. 1 answer
2. asked by Karen
3. 1,363 views
Hannah had dinner at her favorite restaurant. If the sales rate is 4% and the sales tax on the meal came to $1.25, what was the
1. 3 answers
2. asked by kevin
3. 1,352 views
How does the osmotic pressure of an aqueous solution change as evaporation occurs?
1. 1 answer
2. asked by Ginger
3. 1,344 views
1)Find the exact value of sin 165 degrees.Answer: (sqrt6 + sqrt2)/4 2) Simplify: (4m/5n^2)- (n/2m) Answer: (8m^2-5n^3)/10n^2m
1. 1 answer
2. asked by Lucy
3. 1,314 views
A system does 196 J of work on its environment and gains 40 J of heat in the process.(a) What is the change in the internal
1. 1 answer
2. asked by Will
3. 1,259 views
If U-238 splits into two even pieces, and each piece emits an alpha particle, what elements are produced?
1. 1 answer
2. asked by Lee
3. 1,208 views
A system undergoes a two-step process. In the first step, the internal energy of the system increases by 368 J when 144 J of
1. 0 answers
2. asked by Will
3. 1,154 views
You start at sea level on the beach in California. What would the atmospheric pressure be? Then you move to Los Angeles where
1. 1 answer
2. asked by Chrisy
3. 1,154 views
What are some of the benefits of being obese? What are some of the drawbacks?
1. 9 answers
2. asked by Toby
3. 1,151 views
In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0628 of the original volume and a pressure that is
1. 1 answer
2. asked by Karen
3. 1,099 views
An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79%
1. 3 answers
2. asked by mike
3. 1,084 views
Hello all.Does anyone have a scanned copy of "ghost in city hall" worksheet? It is a math worksheet. Thank you, Sandy
1. 8 answers
2. asked by sandy
3. 1,067 views
Let f(x)=–5x(x–5).Then f'(–1)= And after simplifying f'(x)= Hint: You may want to expand and simplify the expression for
1. 1 answer
2. asked by John
3. 1,053 views
Find the exact solutions of the systems of equation x^2+2y^2=18 and x=2y
1. 2 answers
2. asked by Annie
3. 1,030 views
Can someone please explain: Why are non-coding regions of DNA more discriminating than coding regions? I forgot my textbook at
1. 0 answers
2. asked by Biology
3. 1,027 views
A mass of 135 g of an element is known to contain 30.1 1023 atoms. What is the element?hydrogen oxyden aluminum carbon Is it
1. 2 answers
2. asked by Sophia
3. 982 views
What does the public employment office do?
1. 4 answers
2. asked by Tabby
3. 980 views
Sulfuric acid/ Lead Battery:-the electrodes for the battery are composed of Pb(s), PbO2, and/or PbSO4. What are the half
1. 3 answers
2. asked by sara
3. 890 views
What are some challenges with using and managing these alternative, renewable energy resources?o Name at least one other
1. 1 answer
2. asked by Anonymous
3. 862 views
Which process would release energy from gold, fission or fusion? Which would release energy from carbon? From iron?
1. 1 answer
2. asked by Rob
3. 843 views
Mixing copper and zinc atoms produces the alloy brass. What would be produced with the fusion of copper and zinc nuclei?
1. 1 answer
2. asked by Rob
3. 840 views
Is the mass of an atomic nucleus greater or less than the sum of the masses of the nucleons composing it? Why don't the nucleon
1. 1 answer
2. asked by Lee
3. 808 views
Today's nuclear power plants use nuclear..... to generate electricity.fission?
1. 2 answers
2. asked by Emily
3. 801 views
How do you pronounce "Allons-y", I know the how to pronounce the allons part, but not they y after it.
1. 1 answer
2. asked by Nichole
3. 779 views
If a pair of carbon atoms were fused, and the product were to emit a beta particle, what element would be produced?
1. 1 answer
2. asked by Rob
3. 751 views
Unemployment rate is unacceptably high. Is this positive economics, normative economics, or art of economics and why
1. 3 answers
2. asked by nathan
3. 743 views
A Thorium-232 absorbs a neutron and the resulting nucleus undergoes two successive beta decays. The nucleus that results has....
1. 1 answer
2. asked by Emily
3. 727 views
Let's find out the differences between Parent's Day in our country and Mother's Day or Father's Day in America.In our country, a
1. 1 answer
2. asked by John
3. 707 views
I need to find out the english for the following french words, I have found the answers but it doesn't make a lot of sense when
1. 3 answers
2. asked by helen
3. 691 views
a flask containing 155cm^3 of hydrogen was collected under a pressure of 22.5 kPa. what pressure would have been required for
1. 3 answers
2. asked by jerson
3. 684 views
Hi, I am looking for an old english song, but I don't remember the song title, its a slow love song and the only thing i
1. 2 answers
2. asked by nic
3. 682 views
A 2.00 M solution of calcium choloride in water has a density of 1.17g/mL. What is the mole fraction of calcium chloride?How do
1. 1 answer
2. asked by Ginger
3. 654 views
An owl has good night vision because its eyes can detect a light intensity as small as 5.0*10^-13W/M^2. What is the minimum
1. 0 answers
2. asked by Stephy
3. 645 views
I wanted to know if you can give me examples on connotation, because i looked throughout the internet and im still kind of
1. 4 answers
2. asked by Soraya
3. 630 views
I've finished studying a full textbook on linear algebra and another on statistics. I've done most of the practice problems and
1. 2 answers
2. asked by mathstudent
3. 617 views
Let's find out how Parents' Day is different from country to country, and let's learn the expressions related to congratulation
1. 1 answer
2. asked by John
3. 589 views
find the value of 20x when x= 10
1. 2 answers
2. asked by mary
3. 579 views
My issue is that I need a first paragraph buffer before I break the bad news to a superior. Any suggestions?
1. 3 answers
2. asked by Sissy
3. 574 views
I need to write a paper (1500-2500)on Scientific Inquiry. I need to answer the impact society has had on the progress, if
1. 1 answer
2. asked by Kally
3. 574 views
How to find the decimal equivalent of the mixed number and the mixed number is4 2/5
1. 1 answer
2. asked by Suzie
3. 573 views
How to find the decimal equivalent of the mixed number and the mixed number is4 2/5
1. 1 answer
2. asked by PAULA
3. 546 views
Directions: Select the word or phrase most nearly opposite in meaning.Inherent: a) acquired b)inborn c) unnatural d) complete *
1. 1 answer
2. asked by maria
3. 538 views
Who is the heaviest person in history and what was his/her peak weight? I have heard that the record is held by a woman named
1. 0 answers
2. asked by Toby
3. 535 views
I was wondering if anybody could help me with my science assignment.I was required to write out a method for a controlled
1. 2 answers
2. asked by LiEN
3. 534 views
Write a 700- to 1,050-word paper in APA format that includes the following:o A brief description of the water resource problem
1. 1 answer
2. asked by BaBa
3. 523 views
Why will the escape of neutrons be proportionally less in a large piece of fissionable material than in a smaller piece?
1. 1 answer
2. asked by Lee
3. 520 views
Do today's nuclear power plants use nuclear fission, fusion, or both?
1. 1 answer
2. asked by Lee
3. 518 views
Where can I find the reaction that produces ethyl formate, which is Methanol and Methanoic acid?
1. 3 answers
2. asked by Johnathan
3. 515 views
1. What happens to the altitude and pressure when the boiling point is lowered?2. What happens to the altitude and boiling point
1. 1 answer
2. asked by Chrisy
3. 511 views
Let f(x)=7x/x–6Then f'(9)= And after simplifying f'(x)=
1. 3 answers
2. asked by John
3. 509 views
An ideal gas at 18.5°C and a pressure of 1.54 105 Pa occupies a volume of 2.10 m3.(a) How many moles of gas are present? moles
1. 0 answers
2. asked by Sophia
3. 496 views
This isnt really homework, but I kinda need to know this...How do you know when to use Est-ce que As-tu or tu as So this is what
1. 2 answers
2. asked by Slappy
3. 495 views
We all have basic needs (food, shelter) and several wants (car, friends, nice clothes). How do human needs and wants relate to
1. 2 answers
2. asked by Tabby
3. 482 views
In what way are fission and fusion reactions similar? What are the main differences in these reactions?
1. 1 answer
2. asked by Lee
3. 465 views
Can I get weblinks that show the esterification reaction which produces ethyl formate and the estirificaiton process which
1. 2 answers
2. asked by Johnathan
3. 462 views
Does molality or molarity vary with temperature, or are they both temperature independent?
1. 2 answers
2. asked by Ginger
3. 460 views
I was trying to find information on what differnt numbering filing systems mean such as ....serial unit and unit number etc I
1. 0 answers
2. asked by Aleecia
3. 460 views
Find the exact solution(s) of the system: (x^2/4)-y^2=1 and x=y^2+1Answer:(4,sqrt3),(4,-sqrt3) 2)Write an equation for an
1. 1 answer
2. asked by Lucy
3. 459 views
cost of rental equipment is $486,902, accum. amortization is $418,713, net book value for 2006 is $68,169 and 2005 is $74,018.
1. 0 answers
2. asked by missmtl
3. 459 views
Can someone explain this problem to me, I cannot figure out how they came up with the answer. The example in my book does not
1. 0 answers
2. asked by Sara
3. 456 views
is ethanol chiral?
1. 2 answers
2. asked by Ginger
3. 453 views
I would like to be a Gynecologist whenI grown up.So,I have to provide all details to describe a Gynecologist.My principal said
1. 2 answers
2. asked by michael
3. 452 views
Why does a hydrogen bomb produce significant radioactive fall-out?A hydrogen bomb operates with a nuclear reaction that produces
1. 1 answer
2. asked by Emily
3. 444 views
Given one of the starting materials and end product for each of the following reactions, show all reactants, reaction conditions
1. 0 answers
2. asked by Manny
3. 435 views
Are we born with a certain number of fat cells and as we get fatter we get more fat cells or do the fat cells we have just get
1. 0 answers
2. asked by Dawn
3. 430 views
In this answer0.21 cal/g*C. does the degree small zero go over the g or over the C
1. 4 answers
2. asked by sam HELP
3. 423 views
can anyone help me find a quote from president bush and what he says about funding for no child left behind act?
1. 1 answer
2. asked by maggie r
3. 422 views
how are the anthers of a flower adapted to distribute pollen?
1. 1 answer
2. asked by Candice
3. 420 views
swaetshirts are on sale for 26 dollars and are 15% off. what is the sales price before tax
1. 2 answers
2. asked by kc
3. 414 views
is 2 a solution to the inequality, 9+12x<6x-6
1. 1 answer
2. asked by C
3. 399 views
In a nuclear reaction where energy is released, which has more mass, the products or the reactants?The reactants?
1. 1 answer
2. asked by Emily
3. 390 views
how does band gap energy work? when dealing with voltages and color change from LEDs[depends on phosphorous percentage]
1. 0 answers
2. asked by sara
3. 389 views
SO how many mins. are in 900 s
1. 1 answer
2. asked by JERRY
3. 385 views
How many different possible tetrachlorobenzens exist?
1. 1 answer
2. asked by Ginger
3. 374 views
If f(x)=5x^3–2/x^4find f'(x) I don't understand what I did wrong for this ((x^4)(4x+7)-(4x^3)(5x^3-2))/(x^4)^2
1. 4 answers
2. asked by John
3. 368 views
T/F A financial manager who has to resort to short term borrowing did not budget properly
1. 1 answer
2. asked by Sam
3. 365 views
List at least two major potential asvantages of power production by fusion rather than by fission.
1. 1 answer
2. asked by Rob
3. 362 views
How to simplify?11h 179min
1. 1 answer
2. asked by Sami
3. 359 views
y=4x - 3, work out the value of x when y =11
1. 1 answer
2. asked by beth
3. 357 views
SO how many mins. are in 900 s
1. 2 answers
2. asked by James
3. 353 views
explanation of musical chords and an example. thanks for help.
1. 0 answers
2. asked by ollie
3. 347 views
What is the best book to buy to help me review for the AP test?
1. 2 answers
2. asked by Amanda
3. 340 views
what happens to microbes when they are packed in food tins?
1. 1 answer
2. asked by olivia
3. 299 views

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