Questions Asked on
September 26, 2008

Uniform Motion
It is common to see birds of prey rising upward on thermals. The paths they take may be spirallike. You can model the spiral motion as uniform circular motion combined with a constant upward velocity. Assume a bird completes a circle of radius 8.00m every
asked by Sun 
physics
Hey can someone help with this. A movie stuntwoman drops from a helicopter that is 30.0 m above the ground and moving with a constant velocity whose components are 10.0 m/s upward and 15.0 m/s horizontal and toward the south. You can ignore air resistance.
asked by Mel 
physics
The 100 kg block in figure takes 7.00s to reach the floor after being released from rest. What is the mass of the block on the left?
asked by Jennifer 
Physics
a) A cannonball is fired horizontally from the top of a cliff. The cannon is at height H = 100 m above ground level, and the ball is fired with initial horizontal speed v_0. Assume acceleration due to gravity to be g = 9.80 m/s^2. Assume that the cannon is
asked by Sam 
physics
Multiple part question….. A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The cliff is 50.0m above a flat, horizontal beach. With what angle of impact does the stone land (in degrees). A
asked by mb 
Chemistry
A gaseous mixture of and contains 30.8 nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 505mmHG ? I am getting .41 * (505/750)= .27 .27 is my answer, is this right.
asked by George 
chemistry
Heliumoxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles)of He(g) is present in a heliumoxygen mixture having a density of 0.538g/L at 25celsius and 721mmHg ?
asked by tomi 
physics
one of the fastest recorded pitches in major league baseball. thrown by billy wagner in 2003, was clocked at 101.0 mi/h. if a pitch were thrown horizontally with this velocity, how far would the ball fall vetically by the time it reached home plate, 60.5
asked by mb 
Uniform Motion
It is common to see birds of prey rising upward on thermals. The paths they take may be spirallike. You can model the spiral motion as uniform circular motion combined with a constant upward velocity. Assume a bird completes a circle of radius 8.00m every
asked by Mel 
Chemistry
Calculate the pH of: a) ammonia, 0.1M, in water b) ammonium chloride, 0.1M, in water c) a buffer solution containing ammonia (0.1M)and ammonium chloride (0.01M) For NH4^+, pKa = 9.25
asked by Abby 
math
rose counted her money and found that her 25 coins which were nickels, dimes, and quarters were worth $3.20. The number of dimes exceeded the number of nickels by 4. How many coins of each kind did she have? I know that the expression for nickles would be
asked by kayla 
chem
Heliumoxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What percent (by moles)of He(g) is present in a heliumoxygen mixture having a density of 0.538g/L at 25celsius and 721mmHg ?
asked by tomi 
pre calc
rose counted her money and found that her 25 coins which were nickels, dimes, and quarters were worth $3.20. The number of dimes exceeded the number of nickels by 4. How many coins of each kind did she have? I know that the expression for nickles would be
asked by kayla 
Physics
To create artificial gravity, the space station shown in the drawing is rotating at a rate of 0.85 rpm. The radii of the cylindrically shaped chambers have the ratio rA/rB = 3.85. Each chamber A simulates an acceleration due to gravity of 10.0 m/s2. (a)
asked by Nicole 
Math
On a certain farm, on average, 64 hens lay 768 eggs in 64 days. On that same farm, on average, 46 hens eat 46 kilograms of wheat in 46 days. On this farm, on average, the consumption of how much wheat (in kg) corresponds to 2 dozen eggs?
asked by Preston 
Chemistry, Buffers, pH
Hi could someone please help me in the next 5 minutes with this question: Given this data: mass of unknown acid 1.4671g Volume of NaOH used in titration 18.47mL Concentration of the NaOH used 0.2403M pH of the original acid solution 2.16 pH of the final
asked by janet 
Chemistry
Given that for ethanoic acid pKa=4.75, calculate the pH of sodium ethanoate 0.1M.
asked by Alice 
Microeconomics
I put this question on the board before. What I am not clear on is if I should consider the $2 million once when I doing the calculations? Qestion: A publisher faces the following demand shedule for the next novel of one of its popular authors.
asked by G 
stats
Time taken in mins for student to walk to school. 15 mins (4 students) 610 mins (7 students) 1115 mins (10 students) 1620 mins (20 students) 2125 mins (6 students) 2630 mins (3 students) 1)Estimate the probability that a student selected at random
asked by Keisha 
history
WHAT ROLE DID GEOGRAPHY PLAY IN THE DEVELOPMENT OF EARLY CIVILIZATIONS?
asked by taz manian 
math
the smallest integer is zero. is it ture or false. give reason.
asked by ra ny 
math distributive property
rewrite each problem using the distributive property for the following 9 x 35 8 x 84 3 x 13
asked by jordon 
math
The diagonal brace of a shipping crate is 53 inches. The length of the shipping crate is 45 inches. Find the height of the shipping crate. please help!
asked by jennifer 
Spanish
Hello, for the three omens for fortelling Alonso's death I have so far Act 2 P. 113 line 75 Where Alonso says" Tello, a love that's true ignores, the greatest danger. It is my fate that I should have a rival. Is that good, i couldn't find anymore in act
asked by Brady 
chemistry
A 43 kg person drinks 490 g of milk, which has a "caloric" value of approximately 3.0 kJ/g. If only 16% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake? [Hint: The work done in
asked by jamie 
chemisrty
Why do gases deviate from ideal behavior at very high pressures?
asked by mike 
historythe gold rush
does anyone know good websites where i can find info about the gold rush. i need to make a journal and include information about what the journey was like, how i heard about it things like that. thanks!
asked by kerrie 
chemistry
how do i draw a particle model to describe the reaction between sulphur and iron in detail?
asked by  
physics
when an object is dropped frome a hight of 20m above the surface of planet Z, it will fall 5m during the 2nd second of fall. What is the acceleration of a falling object near the surface of this planet?
asked by Sussex 
com150
Read the following sentences, and focus on the grammar area specified in the left column. Then, complete Appendix H by selecting the correct sentence (a or b) for each number and providing an explanation of why you made that choice.
asked by e 
Chemistry
If 560.70 g of water (22degrees) is displaced, what volume of gas displaced it? Any help would be greatly appreciated. I am thinking about using PV=NRT, but do I assume the value of the pressure is 1. Also using 560.7 do i determine the amount of moles?
asked by George 
Algergra
I am stumped! I have been working on these problems for the longest time and I can not figure out what I am doing wrong. Some how when I get to the last two steps I mess up, and I am beyond frustrated. The directions say: Write an equation of the line
asked by Kay 
Math
Determine if f could be a linear function x 0 1 2 3 4 f(x) 3 5 7 11 15 is this a linear function and then... 2x  6y = 12 3x9y = 27 What is the solution of the system of equations? A) no solution B) a point C) infinitely many solutions Is the system
asked by Mike 
chemistry
if Maalox is mixed with 40ml of 0.1 M HCI and isn't neutralized, how much extra help with this antacid pill need to neutralize 40ml of 0.1 M HCL by adding 0.05 M NaOH drop by drop to backtritrate the solution until the pH is neutral?
asked by Tamy 
statistics
Explain the calculations for a hypothesis test and discuss how you would test for signifiance at the 0.05 level
asked by nicky 
arithmetic
Well I am really bad at math mostly multiplication and division.When I start to think that i am getting math my teacher teachs something new what do i do.
asked by DeAna 
English
In the book of The Diary of Anne Frank, what was the "war within" her (or what was Anne's "war within"?)
asked by Mariz 
statistics
level of significance, Pvalue, and confidence interval how do they relate?
asked by nicky 
Intro to FInance
If Mr. Hobbit deposits $2,000 at the end of each year for the next 10 yrs at the intrest rate of 12% per year, how much will have accumulated? How much will he have accumulated if he deposited the amounts at the beginning of each year?
asked by Lynda 
claire
Cuando es tu cumpleanos ( diamesano) does this tanslate to when were you born? ( day month year) is the answer correct  Tu cumpleano Febraro uno 1994 ( HELP )
asked by SPANISH PLEASE HELP 
Us History
How did the action of Daniel Shays and his followers relate to the economic problem of the Confederation period?What was the significance of the movement he led?
asked by Cesar 
Algebra/math
simplify the expression. Assume that all variables represent positive numbers. (36^2y^4)1/2(xy^1/2) I can't get the answer to this I just don't know how to answer this problem. Can anyone help? Thank You! Ashley
asked by Ashley 
Critical Thinking
Can you give me an example of a non prejudicial rhetorical devise. Also can you tell me if this statement is prejudicial rhetoric devise All SUV's are like small apartment homes on wheels
asked by Sam 
physics
A student atands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 18.0 m/s. The cliff is 50.0 m above flat, horizontal beach. With what speed of impact does the stone land?
asked by mb 
accounting
I am having a hard time finding this. Can anyone help me please? Give an example of the kinds of decisions where incremental analysis would be used in each center. Revenue, profit, cost and investment.
asked by Anonymous 
accounting
Why do each responsibility centers have their own budget?
asked by Anonymous 
statistics
two parents who are carriers of TSD have 12 children, what is that no child have TSD, 1 child have TSD and 2 child have TSD
asked by lovebug111 
science/math
I have to make this density graph on a standard sheet of graph paper of this area outside. Each side of the area is a meter (in real life). What would be an good scale to use for my graph on graph paper?
asked by Jasmine 
com grap...help!!!!!!!!``
does anyone know how we can download free photoshop??????????
asked by Anonymous 
history
describe how a historian would use evidence to reconstruct an event that happened 2,000 years ago
asked by taz manian 
history
list three advances in technology and learning made by peoples of the ancient Middle East and tell why each one was important.
asked by taz manian 
psy
I need help to find some data that will help me define the best way to practice selfforgetfulness and humility.
asked by rose (Ms. sue) 
math
i have 40 coins all dimes, nickels, and quarter, worth $4.05. I have 7 more nickels than dimes. How many quarters do I have?
asked by kayla 
cultural diversity
other than the iat what measuments do sociologist use to measure prejudice
asked by Anonymous 
science
How would you design an experiment to determine which of two variables?
asked by Brandi 
government
nonparty groups that raise and distribute money to candidates are called: A)legal bribery organizations b)limited government interest corporations C)political action committees d)political interest and action committees.i think its c
asked by Anonymous 
ecology
what are the reasons for low phosphorus levels in soil? Please explain to me, it seems as if every site that talks about this is saying something different and I really don't understand.
asked by Cynthia 
geography/social studies
What body of land is smaller then the contenent and is completely surrounded by water
asked by Frozenegg48 
claire
One more please Como celebrate tu ultimo cumpleanos? ( fiesta? con quien? que hicieron Uds?) does this translate to what was the best birhtday ( a party with who and what did you do) is this correct Yo ultimo cumpleanos a grande fiesta con muchos mis
asked by SPANISH PLEASE HELP 
4th grade
what feature makes up part of the u.s. border with canada? what feature makes up much of the u.s. border with mexico?
asked by clarissa 
eth 125
How can we get society to dwell on positive aspects instead of negative aspects, which normally leads to stereotyping?
asked by Anonymous 
algebra/math
use the FOIL method to perform the multiplication. (x^1/22)(x^1/2+4) I can not seem to find the answer to this problem. Can anyone help? Thank You!
asked by Ashley 
8th grade
Dear Sir, I have question related to Acids and Alkalis is that; You are given a colourless solution.Describe three tests you would carry out to determine the solution is an acid or an alkali without tasting or using indicators. Please reply me quikly
asked by Fatima 
algebra/math
use the FOIL method to perform the multiplication. (x^1/22)(x^1/2+4) I can not seem to find the answer to this problem. Can anyone help? Thank You!
asked by Ashley 
physical science
As an object approaches the Earth’s surface, what will its acceleration be?
asked by geraldine 
Chemistry
Chromatography How can I tell which of two mobile phases is more polar? Does the fact that one solvent (e.g. isopropanol/ammonia) moves up the TLC plate slower than another solvent (e.g. hexane/ethyl acetate/ethanol)? Or should I look at how far up the
asked by H 
chemistry
If the Kelvin temperature of 2 L of a gas at STP doubles, the new volume would be what ?
asked by mike 
Intro to Programming
I have no clue what i am doing  any and all help would be appreciated  thanks! Finding an Input Giving a Desired Output PROBLEM BACKGROUND In many control problems, the output response of a system to an input is a nonlinear function, that function
asked by Oscar 
MicroEconomics
One of the early economic laws was called Says Law that stated that supply creates its own demand. Using the circular flow chart, explain what this means and how an expanding population results in economic growth.
asked by Katie 
Project Management
How can a project manager be sure that he or she has chosen the correct metrics to assess project performance?
asked by Clay 
chemistry
what is the 'big idea of energy'???!
asked by  
Environmental Science
Explain the four factors that produce changes in population size. Which factors are affecting the population size in the video?
asked by Anonymous 
5th grade math urgent
Okay look: 0001$7586 0102$8022 0203$8502 0304$9249 0405$9877 Jason started college during the 20012002 year and graduated during the 0405 year. How much did Jason's education cost? How do you do it????
asked by Andrew 
physics
Explain how the pitch of the roaring sound relates to the length of the tube.
asked by H 
physics
A seashell is basically an openclosed tube rolled up. Explain why you hear a roaring sound (the sound of the sea) when you place a seashell (or any other kind of tube) up to your ear.
asked by H 
chemistry
A 2.34L container of H2(g)at 752mmHg and 24 degrees is connected to a 3.17L container of He(g) at 717mmHg and 24 degrees. After mixing, what is the total gas pressure, in millimeters of mercury, with the temperature remaining at 24 degrees?
asked by tomi 
Describe other measurements sociologists use to ca
Describe other measurements sociologists use to calculate prejudice
asked by catherine 
English
Who rewrote the diary of Anne Frank and where can I get a website that has an ebook for it?
asked by Mariz 
government
propaganda is a technique:
asked by Anonymous 
Writing
I am trying to write an essay on What ideas are true/untrue of the North.What do it means by ideas. Help??
asked by Benny 
Chemistry
Chromatography How can I tell which of two mobile phases is more polar? Does the fact that one solvent (e.g. isopropanol/ammonia) moves up the TLC plate slower than another solvent (e.g. hexane/ethyl acetate/ethanol)? Or should I look at how far up the
asked by Jeannie 
science
how does yeast cause bread to rise?
asked by erin 
Ameician History
responding to an earlier post that was not clear, I am interesed in a time line of the development of early Americian history of the US. Thank you
asked by Dana 
health care in the US
What can the United States’ health care system learn from health care systems in other countries?
asked by jean 
english
Which sentence is correct?why I eat cake, carrots, pizza, and drink soda. I drink soda and eat cake, carrots, and pizza.
asked by Jenn 
International Business
Does Western Union standardize products or adapt them for different markets?
asked by Cheryl 
Literacy
These letters are supposed to be unscrambled to make 4 words: eeahtkssatetlg
asked by Penny 
social studies
what is the vegetation in europe ? are there forest,deserts,jungles,etc
asked by Syd 
IS5
Plese can you help me with this: describe your strategy for factoring a polynomial, give an example showing all of you steps
asked by Jazmin 
law
confidentiality of health information final examination. examination 40902600
asked by nancy