Thursday
December 18, 2014

Posts by Tiffany


Total # Posts: 814

physics! please help
A long distance swimmer is able to swim through still water at 4km/hr. She wishes to swim from Port Angeles, WA due north to Victoria, B.C., a distance of 50km. An ocean current flows through the Strait of Juan de Fuca from west to east at 3km/hr. In what direction should she ...
October 19, 2008

physics again.
I cant find the acceleration needed to solve the problem. All i know is 200tons is equal to 200000kg. and I dont understand 2.5 degree grade. would it be 200000cos2.5 ... but then how do i get acceleration from there.
October 19, 2008

physics again.
A boxcar of mass 200 tons at rest becomes uncoupled on a 2.5 degree grade. If the track is considered to be frictionless, what speed does the boxcar have after 10 seconds?
October 19, 2008

physics
Two blocks, joined by a string, have masses of 6 and 9kg. They rest on frictionless horizontal surface. A 2nd string, attached only to the 9kg block, has a horizontal force = 30N applied to it. Both blocks accelerate. Find the tension in the string between the blocks.
October 19, 2008

physics uncertainty
experiment times: .15, .13, .16, .14, .15, .14, .15, .14 so i found the average to be .15 and the highest value was .16 the lowest value was .13 so what is the uncertainty? (in other words... .15 plus or minus what number?) please explain. thanks
October 18, 2008

physics please help.
how do you measure uncertainy?? for instance.. if the average was .15 and the highest value among the data was .16 and the lowest is .13... how do you find the +-??
October 18, 2008

DRWLS
the estimate and uncertainty for experiment 1 is .15+-.01 and the .12+-.01 for experiment 2. Is the discrepancy between these two data sets significant? Why? I would say yes, the discrepancy is probably significant, because the measurements should agree to within less than ...
October 18, 2008

physics
can you explain what you mean by three standard deviations? thanks
October 18, 2008

physics
the estimate and uncertainty for experiment 1 is .15+-.01 and the .12+-.01 for experiment 2. Is the discrepancy between these two data sets significant? Why?
October 18, 2008

math
78x43+1
October 18, 2008

Psychology
i have a work sheet and i need help its psychology about neural communication
October 17, 2008

Physics
Consider a box in the back of a pickup truck. If the truck accelerates too rapidly, what happens to the box? Explain why this happens based on physical models.
October 16, 2008

Calculus
Find all points on the curve x^2y^2+2xy=3 where the slope of the tangent is -1. If there is more than one point, use a comma to separate each pair of coordinates
October 6, 2008

chemistry
URGENT!!! what is the chemical reaction of hyrodgen peroxide + NH3 ... The chemical formula and written formula!!
October 2, 2008

Science--Chemistry
URGENT!!! what is the chemical reaction of hyrodgen peroxide + NH3 ... The chemical formula and written formula!!
October 2, 2008

math
Write an equation of the line that passes through(6, -10) and is parallel to the line x = 5.
September 23, 2008

Math word problem
I have this word problem that I can't figure out. The problem is: A 15 lb weight is positioned 10 in. form a fulcrum. At what distance from the fulcrum must a 12 lb weigt be positioned to keep the scale balanced? The substitute that I had today said that the 12 lb. weight ...
August 27, 2008

IMPOSSIBLE ALGEBRA >:(
I have this word problem that I can't figure out. The problem is: A 15 lb weight is positioned 10 in. form a fulcrum. At what distance from the fulcrum must a 12 lb weigt be positioned to keep the scale balanced? The substitute that I had today said that the 12 lb. weight ...
August 27, 2008

Honors English
If the librarian has archived any pictures or important clippings, where would you need to look to find them?
August 26, 2008

Humanities
Why were the goddesses important to early civilizations?
August 14, 2008

english
there were different bias and fallcies acts through-out this speech.
August 4, 2008

science
"Said to be solid as a rock, a joy to hold, and can help you see for miles?"
July 20, 2008

Science
Humidity is the amount of water vapor in the air at a given time. At warm temperatures, air can hold more moisture than it can at cold temperatures. Relative humidity is the amount of vapor the air is holding expressed as a percentage of the amount the air is capable of ...
July 18, 2008

math
3.671 _____ 3.67
June 30, 2008

Introduction to Health Care
what are the three issudes faced by aging population that are believed to be a problem
June 21, 2008

Finance
If the CORR between stock are as follows CORR(A,B)=.85 (A,C)=.60 (A,D)=.45 and expected return is 8% and standard deviation is 20% what would be the best portfolio and why?
June 21, 2008

econ
The FCC is planning to auction wireless spectrum rights, with the goal of maximizing the revenue that it receives from the auction. These rights will almost certainly be used to support wireless communications devices, such as cell phones, pagers, etc. The FCC hires your team ...
June 10, 2008

econ
The FCC is planning to auction wireless spectrum rights, with the goal of maximizing the revenue that it receives from the auction. These rights will almost certainly be used to support wireless communications devices, such as cell phones, pagers, etc. The FCC hires your team ...
June 9, 2008

econ help
I still don't understand how to calculate what the profit-maximizing tuition for full-time students? example when the cost for an additional unit is $125 and the part time students price elasticity is -2.5 and full time students is -1.8.
June 3, 2008

Econ
Consider the situation faced by a for-profit educational institution, such as the University of Phoenix. It has done an analysis of its costs of teaching lower-level business courses (introductory accounting, business law, and so on) in its Indianapolis facilities, and has ...
June 3, 2008

finance
dividend pays $2 risk free rate 4% expected return 14% price of shares 1 year from now $22 beta is 1.25 what is the market required rate of return?
May 31, 2008

finance
alpha of stock zero return on market 16% risk free rate 5% stock earns a return that exceeds risk free rate by 11% What is the Beta of the stock?
May 31, 2008

english
well, i'm not sure. There wasn't any true reason Paris needed die. is it to show Romeo's desperation and love he has for Juliet? or is Paris' death linked somehow to the prince - the prince was not involved in the feud yet he was affected too (Paris was related...
May 28, 2008

english
In Romeo and Juliet, what is the significance of the death of Paris in Act V, scene iii?
May 28, 2008

Macroeconomics
Peter Pundit, an economics reporter, states that the European Union (EU) is increasing its productivity very rapidly in all industries. He claims that this productivity advance is so rapid that output from the EU in these industries will soon exceed that of the United States ...
May 27, 2008

Econ
What kinds of information would you have needed to try to determine whether a company is a monopoly and why is this information important?
May 23, 2008

Econ
How do you calculate the Herfindahl- Hirschmann Index ?
May 19, 2008

Math
Purchased $10,000 in stock, invested $5000 of own money, borrowed remaining $5000 at 8% interest. Stock increases by 10%, what is the rate of the investor's return? I calculated 12%, is that correct?
May 18, 2008

Math
Thanks, I came up with the same answers except for c. I came up with 4% for the taxable and 5% for the municipal, can you show me the equation so I can see what I am doing wrong.
May 18, 2008

Math
Short Term municipal bonds currently offer yields of 4%, while taxable bonds pay 5%. Which gives you the higher after tax yield if your tax bracket is. a. zero b. 10% c. 20% d. 30%
May 18, 2008

Math
A municipal bond carries a coupon of 6 3/4% and is trading at par. What is the equivalent taxable yeild to a taxpayer in a combined federal plus state 34% tax bracket? I calculated 10.23%, is that correct?
May 17, 2008

economics
Thanks, so would it not be advisable to raise the cost of the dinner in Chicago, even though they have less competitors? According to the problem, Chicago has 5 less competitors but less income per household and less households. How would that figure in?
May 15, 2008

economics
You are a team working for an economic consulting firm; your client is “The New Delmonico Steakhouse,” a high-end steak place with four restaurants in Manhattan. Your client is considering opening a single restaurant in Chicago (in the Loop), and wants assistance in ...
May 15, 2008

Gen 105
I a need help creating a table, how does it suppose to look?
May 13, 2008

ENGLISH
I CANT FIGURE OUT THIS WORD....IT MEANS CAUSING GREAT MISFORTUNE amtsoacausli
May 4, 2008

science
Most of Earth's rain and snow comes from where?
April 30, 2008

Physics
Is it possible for a human being who has a life expectancy of 70 years to make a round-trip journey to a part of the universe thousands of light-years distant?
April 30, 2008

Physics
If two lightning bolts hit exactly the same place at exactly the same time in one frame of reference, is it possible that observers on other frames will see the bolts hitting at different times or at different places?
April 30, 2008

Physics
When a light beam approaches you, its frequency is greater and its wavelength less. Does this contradict the postulate that the speed of light cannot change? Defend your answer.
April 30, 2008

Physics
When you drive down the highway, you are moving through space. What else are you moving through?
April 30, 2008

Physics
If you were in a smooth-riding train with no windows, could you sense the difference between uniform motion and rest? Between accelerated motion and rest? How could you make such a distinction with a bowl filled with water?
April 30, 2008

chemistry
how to write this as a net ionic equation? Al(s)+ H2SO4(aq)
April 22, 2008

Science
how do you classify matter
April 17, 2008

Algebra/Geometry
Why are we able to develop the volume formula for cones from the volume formula for pyramids?
April 10, 2008

Math
omigosh thanks so much! I thought it was possibly but wasn't sure how to prove it. Now I know :)
April 10, 2008

Math
Is it possible for two right rectangular prisms to have the same volume yet not have the exact same dimensions? If it is not possible, explain why. If it is possible, give an example that proves the statement.
April 10, 2008

literary
an example of a motif
January 29, 2008

english
what
January 29, 2008

literary
i need an example of sarcasm
January 29, 2008

literary
thanks :)
January 29, 2008

literary
i just need examples for all of those terms
January 29, 2008

literary
EXAMPLES: character types, climax, denouement, epiohany, euphemism, figurative languange, foreshadowing, hyperbole, irony(all3), juxtaposition, mataphor, motif, paradox, parllelism, plot, point of view, pun, sarcasm, setting, simile, subplot, syntax, understatment, catharsis, ...
January 29, 2008

Biology
8. Where is RNA formed? 9. Write out the pairings from DNA to RNA. 10. Where is RNA formed? To where does it travel? 11. What is the difference between mRNA and tRNA? 12. What are three bases of mRNA called? At what organelle are they read? 13. What is the purpose for mRNA? ...
January 29, 2008

humanities
The two different medieval accounts of creation in Genesis have caused scholars to believe that each was written at a different time by a different author. What are the two accounts? Where does one end and the other begin? How is creation described in Hindu religious text of...
January 27, 2008

AP Chem
What's the products when ammonium chloride dissolves in water?
January 10, 2008

U.S History
who was the Texas billionaire who started a 3rd political party in 1992
January 10, 2008

intergrated science1
What are electrons circle atoms in regions called?
December 17, 2007

Algebra
Find the domain of y=2x-4
September 25, 2007

Math question
A computer game starts with a set of 125 tiles separated into 25 equal groups.Janene played the game until there were 6 groups of tiles left.How many tiles were left when Janene finished?
September 22, 2007

MATHMATICS
decimal
September 11, 2007

math
Thank you, you made it easy to understand.
September 9, 2007

math
write 2 1/4 as a percent.
September 9, 2007

math
(-12) -(-17) / (-23)) - (-23)
September 9, 2007

IT
In this assignment, you are going to be gathering information about the future students of NSU at one of our open houses. Since there will be plenty of student candidates with interests on different programs, I would like you to create a database using Microsoft Access. In ...
August 23, 2007

Math
Ok I have this problem and wanted to know itf its right. If its not please let me know what I did wrong... -8X-12+29x-39+62-3=15x+2 -8x+29x=-37x -12-39+62-3=14 -37x+14=15x+2 -22x+2 22/2 x=1/11??
August 23, 2007

Math
I need help with solving this equation and the steps on how to do it? 5X-9-19+22X-38X=-17+17X-9+12
August 23, 2007

chemistry
The first step of the synthesis is described by the reaction below. When 1.750 g of Fe(NH4)2(SO4)2 6H2O is mixed with 13 mL of 1.0 M H2C2O4 , the theoretical yield of FeC2O42H2O is ? grams.. I do not understand why my answer is not correct. How do you find the answer for this ...
June 30, 2007

math,help
1 2 3 115 2 1 1 200 1 0 1 50 1 1 4 0 is the first augmentation 1 2 1 1 2 1 0 1 3 1 1 4 115 200 50 0 is the second augmentation. z = -w = -y1-y2-4y3 y1+2y2+3y3 >= 115 2y1 +y2+ y3 <= 200 y1 + y3 >=50 y1 y2 y3 s1 s2 s3 z 1 2 3 1 0 0 0 115 2 1 1 0 -1 0 0 200 1 0 1 0 0 1 0...
June 13, 2007

prejudice
Describe other measurements sociologists use to calculate prejudice. Here are some sites which may give you some ideas. http://www.ajph.org/cgi/content/full/93/2/262 http://jca.sagepub.com/cgi/content/abstract/10/3/343 http://72.14.209.104/search?q=cache:cxtWKq1uijkJ:www.wjh....
February 21, 2007

computers
how do u erase the history from you computer for good places you've been on the internet? yea but i mean in general also for the internet, there is a green arrow going around a clock on a buttonbeside the favourites button. click it. now go to the today section. right ...
February 19, 2007

math
what is 4,000 in roman numerals MV (the V has to have a bar over it)... now answer my HARD question under Lia =) But isn't MV 1,005??
February 19, 2007

asapppppp
who knows how to do roman numerals Post your problem. I'm sure someone can help. http://www.novaroma.org/via_romana/numbers.html Let us know what you think it is and we'll give you feedback. =) HOW DO U WRITE 10100 10050 10130 10200 10500 10550 10559 IN ROMAN NUMERALS ...
February 16, 2007

math
10050 10110 10130 10200 10500 10550 10559 in roamn numerals plz http://www.novaroma.org/via_romana/numbers.html Let us know what you think it is and we'll give you feedback. =)
February 16, 2007

math
10050 10110 10130 10200 10500 10550 10559 http://www.novaroma.org/via_romana/numbers.html Let us know what you think it is and we'll give you feedback. =)
February 16, 2007

math
10 100 in roman numeras http://www.novaroma.org/via_romana/numbers.html Let us know what you think it is and we'll give you feedback. =)
February 16, 2007

math
in roman numerals is ? 160- clx 170- clxx 180- clxxx 190- cxc 200- cc are those right ? If you capitalized the letters, it would be right. times table and a math seet I dont like
February 15, 2007

math
roman numeral for 120 130 140 150 160 170 180 190 You really need to be figuring out these values for your self based on the instructions I and another user gave you in your previous questions. That is, after all, the purpose of homework. C = 100 L = 50 X = 10 Using these, you...
February 15, 2007

math
roman numerals 110 111 112 113 CX CXI CXII CXIII I believe.
February 15, 2007

math
i need help with roman numerals asap I is 1 V is 5 X is ten L is 50 C is 100 D is 500 M is 1000 with this you can make any number you can only put 3 of anything in a row though so you can only do III not IIII for 4 you IV if a smaller symbol is in front then you subtract its ...
February 15, 2007

chemistry
if 37.9 liters of NO at .993atm and 146 degrees celcius are decomposed by the reaction 2NO-->N2+O2 how many grams of nitrogen will be formed... could you show mw step bu step how to do this ? thanks....i have finals tommorrow.... i need HHHHHHEEEEEEELLLLLLPPPPPPPP PV=nRT P=...
January 10, 2007

chemistry
calculate the density of NO3 gas at 0.970mm Hg and 35C Take 1 liter. calculate n in PV=nRT then, density= mass/volume= (n*molmassNO3)/1liter. I STILL DONT UNDERSTAND HOW TO DO IT COULD U PLEASE EXPLAIN What don't you understand about PV = nRT and how that fits your problem...
January 9, 2007

CHEMISTRY
the hindenburg was a hydrogen -filled dirigiable that exploded on 1937. The Hindenburg held 6.5*10^5 L of hydrogen gas at 23C and 760mmHg, what mass of hydrogen (H2) was present? calculate n in PV=nRT mass=n*molmassH2
January 9, 2007

chemistry
155.0 grams of N2 (nitrogen gas) are put in a 4.50L container at 35C. What is the pressure? PV=nRT n=155/molmassN2 Convert temps to K.
January 9, 2007

CHEMISTRY
DETERMINE THE TEMPERATURE REQUIRED FOR 0.0354MOL OF GAS TO FILL A BALLOON TO 2.5L UNDER 0.998K PA PRESSURE PV = nRT. Change kPa to atmospheres and use R = 0.08206 L*atm/mol*K.
January 8, 2007

CHEMISTRY
IN A CERTAIN EXPERIEMT A SAMPLE OF HELIUM IN A VACUUM SYSTEM WAS COMPRESSED AT 25C FROM A VOLUME OF 6000.0ML TO A VOLUME OF 240.0ML WHERE ITS PRESSURE WAS FOUND TO BE 32.0 MM HG. WAHT IS THE ORIGINAL PRESSURE OF HELIUM? (P1V1)/T1 (P2V2)/T2 Change T to Kelvin.
January 8, 2007

CHEMISTRY
A TANK OF COMPRESSED CO2 HAS A TEMPERATURE OF 43.5C AND A VOLUME OF 42.5L THE CO2 IS COMPLETELY TRANSFERRED INTO A SMALLER TANK THAT HAS A VOLUME OF 25.0L WAHT IS THE TEMPERATURE OF THE SMALLER TANK IF THE PRESSURE REMAINS CONSTANT? V1/T1 = V2/T2 Don't forget to change T ...
January 8, 2007

CHEMISRY
A SAMPLE OF 5.5L OF ARAGON DAS IS STORED IN A SYLINDER AT A TEMPERATURE OF 32.2C AND A PRESSURE 8.42 ATM. THE SAMPLE IS TRANSFERED COMPLETELY TO ANOTHER 2.8L CYLINDER. SEVERAL HOURS AFTER THE TRANSFER THE SECOND CYLINDER HAS OBTAINED A TEMPERATURE OF 60C. WHAT IS THE PRESSURE ...
January 8, 2007

CHEMISTRY
A GAS OCCUPIES A VOLUME OF 584 ML AT A PRESSURE OF 12.01K PA AND A TEMPERATURE OF 303K. whEN THE PRESSURE IS CHANGES, THE VOLUME BECOMES 477ML. IF THERE HAS BEEN NO CHANGE IN TEMPERATURE, WHAT IS THE NEW PRESSURE? ........ PLEASE HELP ME WITH THIS ....THANKS SOOOOOOO MUCH...
January 8, 2007

PLEASE SOLVE MY RIDDLE
What is ugly on the inside but beuatiful on the outside? (not human, not reflecting mirrors, an object is what I need)(MAKE SURE TO EXPLAIN WHAT OBJECT IS IS IF IT'S NOT COMMON AROUND THE HOUSE)
December 24, 2006

science
what is the difference between mass and volume? Mass is how much an object weighs. Volume is the amount of space the object takes up.
December 14, 2006

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