Questions Asked on
October 24, 2006

chemistry
which element has 16 protons, 17 neutrons, and 16 electrons? Look on the periodic table. It is element number 16 since that is the number of protons and electrons. I know sulphur has 16 of each. However, it might be an isotope of sulphur to have 17
asked by lop 
physics
This is a twopart question, and I got the first part, but I do not know how to do the second part. Two students walk in the same direction along a straight path, at a constant speed one at 0.90 m/s and the other at 1.90 m/s. a) Assuming that they start
asked by Anonymous 
Chemistry
What elements contains a full third energy level and what element contains the first p electron?? Here is an interactive site that will show you how the 1s, 2s, 2p, etc levels fill. Post your answers here if you want someone to check them. Also, you need
asked by Bryan 
physics
A small ball rolls horizontally off the edge of a tabletop that is 1.2 m high. It strikes the floor at a point 1.52m horizontally away from the edge of the table. a) How long is the ball in the air? b) What is the speed at the instant it leaves the table?
asked by jenny 
History
What problems did the Israelites face when they returned to Canaan? This is a religious, rather than a historic question. Please check your book or the Bible for the answer your teacher expects. As there is no physical historical evidence for Any of the
asked by Lauren 
PHYSICS
During a tennis match a player serves the ball at 23.6 m/s with the center of the ball leaving the raquet horizontally 2.37m abovet eht court surface. The net is 12m away and .9m high. When the ball reaches the net a) does the ball clear it and b) what is
asked by Bobby 
openended formatting tags no longer an issue
If you forget to end your bold or italic tags, this is no longer an issue. All formatting tags are terminated at the end of each post. Tags currently allowed for anyone to use are b, i, u, sup and sub. example It is still good practice, however, to pair
asked by Leo 
math
Can someone help me with prime and composite numbers? Prime numbers are counting numbers that can be divided evenly bt only two numbers:1 and themselves. A prime number can also be described as a counting number with exactly two factors, 1 and itself. So,
asked by haylo 
Chem 1
In the ground state of element 115, how many electrons have ml=1 as one of their quantum numbers? Can anyone provide an explanation? I am kind of stuck... and I don't think it is too hard, I just don't know where to start. Thanks ahead of time... Go to
asked by Rossi 
Physics
A airplane has a speed of 290 km/h and is driving at an angle of 30 degrees below the horizontal when the pilot releasese a radar decoy. The horizontal distance between the release point and where the decoy hits the ground is 700m. a) How long is the decoy
asked by Jose 
college essay number one help
how have you taken advantage of the educational opportunities you have had to prepare/ hi can you just give me like the first three or five words so i can start. i mean, i have looked at websites and i read the guidelines on how to write a college essay
asked by Anonymous 
science
You throw a vall toward a wall with a speed of 25m/s and at an angleof 40 degree above the horizontal. The wall is 22m from the realease point of the ball. a) How far above the release point does the ball hit the wall? b) What are the horizontal and
asked by Jose 
Simpson's rule
Is the simpson's rule always more accurate than the midpoint rule and trapezoidal rule? Not always; it is possible that the midpoint and/or trapezoidal rule determine exact values. 1. Some functions values for a function f are given below. x 0 0.5 1.0 f(x)
asked by 413 
science
A science student drops a rok down a mine shaft. It takes 3 sec. for the rock to hit the bottom of the shaft , at what speed of the rock just before impact? 32 feet per second per second is the acceleration rate of earth. At the end of second 1 the speed
asked by pat 
chem
assuming you have o.4g of Y(OH)3, calculate the mass of Ba)2 required to produce YBa2Cu3O7. Is that BaO2 for Ba)2? Is that really BaO2 or BaO. BaO2 is barium peroxide, not oxide. Y(OH)3 ==> YBa2Cu3O7 Step 1. Convert 0.4g Y(OH)3 to mols Y(OH)3. Step 2.
asked by nick 
Chemistry
I was wondering if somebody could help me with this... Classify the following substances as covalent molecules or ionic compounds: a. MgO e. LiCl b. NI3 f. SF4 c. CuS g. XeF4 d. NO2 h. CsF How do you know if they are covalent or ionic bonds? Metal +
asked by Isabel 
precalc
solve each system of equations using matrices x+2y3z=0 2x4y=z=7 2x+2y3z=4 I don't see how it is possible to even attempt a matrix on this text oriented site.
asked by Erica 
physics
A rifle is aimed horizontally at a target 30 m away. The bullet hits the target 1.9 cm below the aiming point. What are the a) the bullet's time of flight and b) its speed as it emerges from the rifle? A) is expose to be 62ms B) is expose to be 480m/s this
asked by jenny 
chem
assuming you have o.4g of Y(OH)3, calculate the mass of BaO2 required to react stoichiometrically to produce YBa2Cu3O7. Now calculate the mass of CuO. Please HELP! Write the balanced equation. Then, calculate the moles of Y hydroxide from .4 g. Then,
asked by nick 
message board threads
As you may have noticed, an entire thread can now be viewed by accessing the original message. I think this is great for students, and this may enhance search engine rankings. If anyone has serious objections to this, please let me know. Thanks, Leo I
asked by Leo 
Derivatives
What is the fourth derivative of f(x)= e^x^2. I got f''(x)=2e^x^2 + 4x^2e^x^2 i need some help on find f''''(x) You have f(x) = ex2 then f'(x) = 2x*ex2 = 2x*f(x) f"(x) = (4x2  2))ex2 = f(x)*(4x2  2)) f"'(x)= f'(x)*(4x2  2)) + f(x)(8x) =
asked by 413 
Another A.P Question
A different rigid 5.00L cylinder contains 0.176mol of NO(g) at 298 k. A 0.176mol sample of 02(g) is added to the cylinder, where a reaction occurs to produce NO2(g) (d) write the balanced equation for the reaction. (e) calculate the total pressure, in atm,
asked by Brianna 
Finance and Investment
What is the value of a common stock if: a) If earnings and dividends are growing annually at 10%, the current dividend is $1.32 and investors require a 15% return on investmenets in common stock? b)What is the value of this stock if you add risk to the
asked by Kim 
physics
I need help solving these problems. I tried but my teacher did not teach it to us so it is very difficult for me. Thanks. "Projectiles launched at an angle" 1. A golfer can hit a golf ball a horizontal distance of over 300 m on a good drive. What maximum
asked by anonymous 
Math
Solve this riddle please Use the riddle to name a correct animal that will gain you admission to a dance. These animals will get you through:elk,yak,dog These animals will never do; horse,mouse,frog Would this dance be a costume dress up? Maybe it was a
asked by Sam 
One more A.P Chemistry
Three volatile compounds X,Y, and Z each contain elements Q. The precent by weight of element Q in each compound was determined. Some of the data obtained are given below Percent by weight Molecular Compound of Element Q Weight X 64.8% ? Y 73.0% 104. Z
asked by Brianna 
Geography
Land use: What type of farming is suited to poorer soil, a short growing season, hillyland, and nearness to markets? The nation's largest inland port, situated at the junction of three rivers? The area which together with the coastal waters off Cape Cod,
asked by elizabeth 
math
What is the way to find the answer to the problem....3x+1=10? My teacher told us in class but I just didn't understad it. The idea is to get the x all alone on one side. Subtract one from each side. Then, divide each side by three. 3x + 1 = 10 First
asked by Jorden 
International Business
Your organization (you may select any organization you wish, real or fictional) is considering investing in the Philippines, and you have been asked to give a presentation on this opportunity. In the presentation, you need to address the following:
asked by Vianna 
vocabulary
I need to find a six letter word made from the letters in the word favorite. There can be no repetition of the letters. FAITOR TAIVER VIATOR
asked by Mary 
chemistry
How would you solve this problem?... magnesium metal reacts rapidly in hot water. Predict the mass of pericipitate that will form if a 2.0g strip of magnesium reacts completely with water. *Use the 5step method* *Answer: 4.8g* I don't know what the five
asked by B 
environmental science
Explain the significance of oxygen and carbon dioxide in an ecosystem?
asked by edwin 
Math
How many integers are NOT perfect powers between 1 and 1000? It might be easier to count how many are powers and subtract that number from 1000. To do this you should first find the highest power of 2 less than 1000, then you'll know how high of powers you
asked by Nathan 
math
determine the area of triangle abc when side ab= square root of x, side bc= square root of x, and side ca= the square root of the square root of x. So how do I solve it. How do I add the square root of x + the square root of x + the square root of the
asked by Gina 
science
A gun that shoots bullets at 469m/s is to be aimed at a target 45.7 m away ans level with the gun. How high above the target must the gun barrel be pointed so that the bullet hits the target? Which equation would I use? I should have gotten 4.8 cm for the
asked by Jose 
find the seats
Abraham, Wesley, Chirah, Jack, Kareem, Natalie, Shannon, and Becky were lucky enough to get tickets to the baseball playoff game. They could not get eight tickets together, so they sat in pairs in different sections of the ballpark. This gave each pair a
asked by Kamil 
precalc
find real numbers a,b,c so that the graph of the function y=ax^2+bx+c contains the points (11,4), (2,3) , and (0,1) Write three equations, with each point in one. Then solve the three equations.
asked by Erica 
social studies
how did the crusades encourage europeans to explore The Crusades took thousands of men from Europe to Turkey, Israel, and other parts of the Middle East. There they learned of different ways of life and exotic products from many other parts of the world.
asked by nikki 
Chemistry
I have to fill in the blank with the a term, short phrase or number The Blank describes the sequence in which orbitals are filled. Is it The Pauli exclusion principle?? No. The Pauli exclusion principle states that no two electrons may occupy the same
asked by Bryan 
math: and i really need help
You plug a microwave into a 20ampere (amp) electrical circuit. The microwave use up to 12.5 amps. At most, how many amps are availible for other appliances? 20  12.5 = ?? amps
asked by pinkpolkadots7 
Geometry Definition
What does (cevians) mean in geometry http://mathworld.wolfram.com/Cevian.html
asked by Nique from dallas 
Science
_______ and heat caused by overlying rocks and ___________________ elements produce magma. pressure for first word magma large
asked by Liz 
villi/small intestine
The role of the villi in the small intestine is analogous to the gastric pits in the stomach. sweat glands in the skin. alveoli in the lungs. cilia in the lungs. which one would you use best? http://en.wikipedia.org/wiki/Alveoli
asked by lezli 
science
Suppose that the wolves on Isle Royale die off because of disease or genetic defects from inbreeding. Should we (a) intervene and import new wolves to help control the moose population or (b) let the moose population grow until it exceeds its carrying
asked by stacy 
jobs 4 teens
im a 13 year old girl and i just want to ask if i coul be able to get a job at my age ? i live in the uk and i want to gt some money but i don't know if i will be able to. I babysit. My mom made be take a babysitting class and CPR. Parents like that I took
asked by sheromeya 
science
When forming oxime derivatives from ketones and aldehydes, why when I reacted my aldehyde with hydorxylamine hydrochloride did I get no precipitate and hence no reaction. I have looked everywhere and hydroxlamine is suppose to react with both ketones and
asked by Heather 
Help Please
Help to solve this 1/2 (3g2) = g/6 nevermind I was missing a bracket in the solution. multiply both sides by 2 This gives 3g2=g/3 now cross multiply to get 9g6=g now add a g to both sides and +6 to both sides. g=3/4
asked by Confused 
u s govt mock senate
hi i need help with this: I have to write a bill for the state arizona and i'm a republican. my teacher didn't really explain it but what things would say. can you just give give an example how to start it or which sites to look at it. My topic is science
asked by Anonymous 
precalculus
Solve eacy system of inequalities. If the system has no solution, say that it is inconsistant. x y z = 1 2x +3y +z = 2 3x +2y = 0 add the top two equations. 2x+2y =3 That is inconsistent with the last equation.
asked by Erica 
disease/mitosis
What disease is caused when cells in body divide too rapidly by mitosis? It has been suggested that both certain types of cancer and Alzheimers have a relationship to mitotic disease. 1. Cancer 2. Elephantiosis (spelling?)The Elephant Man Is a good
asked by matthew 
math
24= 2(b3)+8 I suppose you want to solve 24= 2(b3)+8 for b, am I right? If so, subtract 8 from both sides to get 16 = 2(b3) divide both sides by 2 to get 8 = b3 then add 3 to both sides to get 5 = b then check the answer 24 = 2(53) + 8 = 16 + 8
asked by shanique 
personal finace
Bernie and Pam Britten are a young married couple beginning careers and establishing a household. They will each make about $50,000 next year and will have accumulated about $40,000 to invest. They now rent an apartment but are considering purchasing a
asked by sherry 
math
Nancy Tai has recently opened a revolving charge account with MasterCard. Her credit limit is $1000, but she has not charged that much since opening the account. Nancy hasn't had the time to review her monthly statements as promptly as she should, but over
asked by sherry 
Resonance structures
I'm trying to figure out some incorrect answers on my last test. I'll try to explain what the original structure looks like and hope you can decipher it. It is a cyclohexane with two double bonds. Carbon # 1 has a double bond to its left and none to its
asked by Sheryl 
Modern World History
What is the relationship between wealthy nations and supporting of the arts?? Wealthy nations have more money to support the arts than do poorer nations. I hope this helps. Thanks for asking. In Wealthy nations there is a chance for leisure time and
asked by bryan 
Science Helpp!!
Explain how the pair of terms are related and/or how they are different. 1. Haploid and diploid 2. Body cells and gametes Haploids and diploids are both cells, haploids have 32 chromosomes and diploids have 64 Body cells and gametes both have 64
asked by Maya 
math
if a school has a hotdog special for lunch. there are 18 classrooms and there are 28 students in each class. estimate to the nearest ten to find out about how many hot dogs does the school need to order? Wouldn't it be 20 x 30? This looks like a very
asked by samira 
good plasmid for gene cloning
A good plasmid for gene cloning will have genes that make it easily detectable or have multiple sites that correspond to a particular restriction enzyme or be small enough to pass easily through a pilus during bacterial conjugation. or have more base pairs
asked by Tarik 
data managment
1. can a network have exactly one vertex with an odd degree? Provide evidence to suport your answer. 2. explain why for any materix A, (At)t = A. You may use examples to illustrate your answer. this is grade 12 data managment help me out guys if u know how
asked by Alex hlp plz 
hi govt party politcs
hi we are doing a mock senate in my government class. my committee name is appropriations and they give money to other committees and i got assigned to arizona and i'm a republican. in real life, i'm a democrat, liberal. so i'm just having a hard time
asked by Anonymous 
english
What is the simple subject and simple predicate of the following sentence? As I skiied down the hill,the wind bit at my face. http://www.chompchomp.com/terms/subject.htm Scroll down for the section to help you determine the difference between the simple
asked by arielle 
Home Economics
Why is NSP importat in the diet? I think this article will explain the importance of NSP (Broken Link Removed)
asked by Gareth 
mathplease help
x + 12 >or= to 1 What could x be? I think that it is 11 or less. I'm not sure though. Please help me! that is correct 11
asked by pinkpolkadots7 
science
what are a+ topics i could use to write a 2 page 7th grade science report http://en.wikipedia.org/wiki/Ursinae_hybrid http://www.ctv.ca/servlet/ArticleNews/story/CTVNews/20060511/grizzly_cross_060511?s_name=&no_ads=
asked by bree 
Earth Science
I need help with igneous rocks and the rock cycle. Is there a web site that will help me. One question is When magma cools below Earth's surface, it forms __________grained, _________ igneous rocks. fine grained for your other word read:
asked by Barb 
Baking
For school I need to know how to make a tart. go to google Here is a tart, with a French name yet. http://joyofpies.com/TarteAuxPommes.html http://joyofpies.com/TarteAuxPommes.html
asked by needs help 
History HECK. X_X
My evil history teacher assigned us a project (that is a major grade) where we have to find 20 causes of the American Revolution. They must begin with the French and Indian War and end with Lexington and Concord, and I only have 13. Help? =) If you post
asked by Anonymous 
english
how do i know if this sentence has a participle or participial phrases "Having deposited our mournful burden upon tressels within this region of horror, we partially turned aside the yet unscrewed coffin, and looked upon the face of the tenant."Edgar
asked by stacy 
social studies
who is Khufu? See http://guardians.net/egypt/khufu.htm an Egyptian King or prince in aincient times
asked by thalia 
psychology
which person has had the most influence on the growth of psychology? I would say Aristole and Plato. I would say Eve. Could you give me some information on her? Eve was that babe who convinced her man to eat the forbidden fruit, and got him in big trouble
asked by jessica 
Calculus
There is a sign that is 10ft on one side and 15ft on the other side (from the ground to the base of the sign), the billboard itself is 20ft. The painter brings a 25ft ladder in length. If the patch of ground 10ft from the base of the sign is used, at what
asked by Meagan 
Chemistry
What is the wavelenght of radiation of 1.50X1013Hz? The wave equation will find this: frequency*wavelength=speedoflight
asked by Anonymous 
Science
What are some things that are in the US that use or need radium to operate? Radium has very few commercial uses these days, it formerly was used in luminous watch dials, and used in cancer treatment. However, both those uses have stopped because of the
asked by Lanna 
essay writing
Hello. Below is a sentence in my essay for school: Lolling in lounge and other chairs gathered around the pool, alleviating water slides down the throats of loving relations. I was curious if this was written correctly because 'alleviating water' comes
asked by Florence 
word study
they're defintion what is the drfintion of their "their" is plural possesive. For example: That is their car. I think that your'e answer is: They are (as if a group of people are doing something) (Ex. They are going to Grandma's house.) Who is doing
asked by jashemah 
ethnicity class
I need help to finish responding this question and also if someone will tell me if i'm going the right way. the question is:Consider racialimbalances in education,the economy,family life,housing,criminal justice,health care,and politics.Of these societal
asked by marie0720 
Ethics help needed
Can someone help me correct my work or help me answer the question. The question is: How do you think slavery influenced the evolution of both black and white america today?explain your answer. My answer: What i think is that by having slavery it made the
asked by Anny202005 
social studies
who is the leader of turkey? http://www.infoplease.com/ipa/A0108054.html
asked by menotellu 
social studies
this is about the early civilizations of egypt, nubia,sumaria, assyria, persia, israel, indus valley,aryans, china. the question is: in which ways did cultures or civilizations come in contact and, as a result, aspects of one culture were adopted by
asked by natalya 
chem
Was Mercury the first superconductor? No. http://www.jiskha.com/display.cgi?id=1161728962 see what happened in 1962 Thanks for your answer. Would you please let me know if steel is a superconductor? never mind, it is not.
asked by maria 
Science
which 2 were most likely formed by the slow build up of minerals from water drops? A pool of water and trench B pool of water and stalagmite C stalacite and trench D stalagmite and stalactite probably D d
asked by Jenny 
writing
• Post your response to this question: What is the role of rhetoric in influencing people's attitudes and beliefs? How can readers distinguish between prejudicial and nonprejudicial use of rhetorical devices? Posted by Ms. Sue on Tuesday, June 20, 2006
asked by jazmin 
MATH
i need help filling this out! 4x10=323x 4x10+____=323x+22 ____10+____=32+_____ ___=___ ___=___ x=___ ok you need to solve for x. remember the rule, whatever you do on the left side, you do to the right side and vice versa. on the second step, they add
asked by alejandra 
math
what is 45 times 20 900 900 Do you have a calculator? Do you know how to do multiplication by hand? Tell us what you don't understand. You need to learn how to do this instead of relying on someone to give you the answer.
asked by mark 
Science
which two were most likely formed by the slow build up from water drops. Rain?
asked by Jenny 
English
summarize interview with Marshall McLuhan interview on Electria Media and Education If you already have the interview, you need to pick out what you believe to be the important points that he makes. In case you don't have a copy of his views, here are some
asked by Taunya