Questions Asked on
December 21, 2010

Grade 11 math  HELP!
Skyscrapers sway in highwind conditions. in one case, at t=2s, the top floor swayed 30cm to the left (30cm), and at t=12, the top floor swayed 30 cm to the right (+30cm) of its starting position. a) what is the equation of a sinusoidal function that
asked by Allison 
physics
A car that weighs 15,000 N is initially moving at 60 km/hr when the brakes are applied. The car is brought to a stop in 30 m. Assuming the force applied by the brakes is constant, determine the magnitude of the braking force.
asked by miyako 
biology /check please
(stimulus v. response)? Which of the following is a stimulus, which is a response? Thanks 1)the recess bell ringing in an elementary school 2)your mouth watering at the sight of food on a plate 3)a sudden drop in air temperature 4) a flu virus entering
asked by joy 
Physics
A girl having mass of 35 KG sits on a trolley of mass 5 KG. The trolley is given an initial velocity of 4 m/s by applying a force. The trolley comes to rest after travelling a distance of 16 m. (i) How much work is done on the trolley? (ii) How much work
asked by Harshid 
11th grade
4. The use of technology such as telephones and computers means that money exchanges and other financial transactions can be a. based on the U.S. dollar all over the world. b. converted to prices in any currency. c. made instantaneously. d.sensitive to
asked by Anne 
physics
A train traveling at a constant speed rounds a curve of radius 250 m. A chandelier suspended from the ceiling swings out to an angle of 15.5° throughout the turn. What is the speed of the train? what equation should i use?
asked by Bill 
Physics
A model airplane of mass 0.9 kg is attached to a horizontal string and flies in a horizontal circle of radius 5.2 m, making 1.2 revolutions every 8 s. (The weight of the plane is balanced by the upward “lift” force of the air on the wings of the
asked by Aaron 
statistics
A sample of the number of study per week of college students is collected. Some of the sample results of the survey are given in the following table Study Hr 4, 10, 20,24, 34, 36, 42 Z score 2.5,1.75,0.5,0, 1.25,1.5,2.25 P. Rank 10, 25, 35, 40, 50, 75
asked by Ronnie 
Chemistry
What is the balanced equation of HClO4(aq)+Sr(OH)2(aq)
asked by Jaime 
Physics
A model airplane of mass 0.9 kg is attached to a horizontal string and flies in a horizontal circle of radius 5.2 m, making 1.2 revolutions every 8 s. (The weight of the plane is balanced by the upward “lift” force of the air on the wings of the
asked by Aaron 
Biophysical Chemistry
A mole of liquid water is vaporized at 100 degree C and 1 atm. Th heat of vaporization is 40.7 kJ/mol. What are the values of Wrev, q, detaU and deta H? I'm not sure what is the volume because the pressure it not change so I so confort can I use Wrev =
asked by Laura 
high school (math)
Match the mathematical expression with its translation. 1. the product of two numbers 2. y divided by x 3. six less than a number is y 4. x subtracted from y 5. the sum of two numbers is six 6. x minus y 7. the sum of x and y 8. x divided by y 9. six times
asked by hope 
Science
If a radioactive isotope has half life of 5 days,how long will it take for its radioactive strength to be a maximum of one thousandth,(1/1000) of its original value?
asked by Bree 
math
Hi, Can someone please help me with my math. The distance between Capeton and Jonesville is 80 miles. Thescale on the map is 0.75in : 10 miles. How far apart are the cities on the map? A. 6in B. 60in C. 600in D. 1067in Thank you :)
asked by Anna 
chemistry
The concentration of HNO3 in a solution is 3.50 106 M. What is the [H3O+] in the solution? _______M What is the [OH] in the solution? ________ M What is the pH of the solution? What is the pOH of the solution?
asked by jim 
Business Algebra
I need to know the formula for these questions and just how to do them. If you could help please. As a financial planner a client comes to you for investment advice. After meeting with him and understanding his needs, you offer him the following two
asked by Diane 
Physics
A pendulum has a mass of 2.7 kg, a length of 1.7 meters, and swings through a (half)arc of 22.7 degrees. What is its amplitude to the nearest centimeter?
asked by Karin 
physics
maximum tension in the string of an oscillating pendulum is double of the minimum tension. Then angular amplitude is
asked by Anonymous 
Biophysical Chemistry
The combustion of 1 mole of C2H5OH (Ethanol) in a bomb calorimeter produces 1364 kJ/mol at 25 degree Calcium. What is the value of enthalpy chamge for the following combustion reaction? C2H5OH(l) + 3O2(g) => 2CO2(g) + 3H2O(l)
asked by Laura 
physics
anyone who knows the answer to this question please show your work. drwls i know i posted this queestion before but you didn't reply to my comment. Your friend has climbed a tree to a height of 6.00 m. You throw a ball vertically up to her and it is
asked by sabeen 
AP Physics PLEASE HELP DUE TOMORROW
A young male adult takes in about 4.0 104 m3 of fresh air during a normal breath. Fresh air contains approximately 21% oxygen. Assuming that the pressure in the lungs is 1.0 105 Pa and air is an ideal gas at a temperature of 310 K, find the number of
asked by Sarah 
trig
How do you write the quadratic equation with integer coefficients that have the roots 73i and 7+3i?
asked by KELLY 
science
what are 3 examples of selective breeding in plants
asked by Andrew 
physics
Compute the average number of interactions per bunch crossing for a luminosity L=2.5E31 cms1,if the total cross section is sigma =20mb and bunch crossing occur every T=4.What is the probability of having zero interactions in a bunch?
asked by Phyllis 
Spanish
What is this asking? ¿Cómo eres? choices would be: This question asks about about a person's health about what a person is like how a person is feeling today what a person is wearing I think it is about a person's health or how a person is feeling today?
asked by Jeremy 
Business Algebra
Part I: As a financial planner a client comes to you for investment advice. After meeting with him and understanding his needs, you offer him the following two investment options: Option 1 (refer to section on Mathematics of Finance in your text.): Invest
asked by Tracey 
biology
which of the following pair of organisms represents a predatorprey relationship? a flea and dog b robin and tree c polar bear and seal d bacteria in human large intestine and human
asked by pkd 
4th grade
spider plants,tulips,and potatoes can grow seeds.how are their otherways of ruducing alike?
asked by kimmy 
English 2
In collecting information, the chief problem often facing historians and reporters is that there are too few facts or too many: A. Details B. Opinions C. Photographs D. Charts and Graphs is it A?
asked by Cheryl 
math
A landscaping company is laying a triangular flower bed. The height of the trangle is 15ft. What lengths of the base will make the area at least 255ft squared?
asked by shannon 
8th grade science
compare and contrast the effect of a catalyst on a chemical reaction with that of an inhibitor?
asked by jess 
L.A.
What is the most important key to an effective essay
asked by Anonymous 
chemistry
calculate the mass that if converted to energy would be equivalent to the energy released when 1g of CH4 is burned
asked by isaac 
chemistry
if BaSo4 was precipitated in solution contain 0.012 M NaCl and 0.002 M BaCl2 .calculate the sulfate concentration which is sufficient for saturate the solution with BaSo4 , if you now that the Ksp for BaSo4 equal to 1*10^10 .
asked by shahad 
math
covert to a decimal and round to the nearest hundreth 8\11
asked by tenesha 
Medical Information management and office practice
JaneDoe is admitted to the hospital. Her admission is assigned a new medical record number 105018. She has another record number 000561 from a previous hospitalization. The information from 000561 was moved forward to the new admission 105018.
asked by JULIANNA 
English
I forgot to include these very last sentence. I really hope you can have a look at them, too. 1) I helped my mum dress the Christmas tree and wrap up the last Christmas presents. 2) I decorated the Christmas tree with lights, angels, bells, snowmen,
asked by Franco 
math
im helping my brother with his homework but i completely forgot how to do this? Solve the system by substitution: y=3x4 x+5y=4
asked by Emily 
APUSH
What helped the oneida community's economy prosper?
asked by LULU 
6th grade
If you throw 500 darts at a hexagonal shaped dart board, how many will land in the shaded area? hexagon is divided into 24 triangles. 6 are shaded and 18 are white
asked by ian 
British Lit.
I need to explain Beowulf's speech lines 365428. topic audience and tone of the speech.
asked by Elizabeth 
world issues
Is fair trade a solution for farmers in the developing world?
asked by vikki 
biology
in which biome would the extinction of an animal species have the least impact? a tundra b permanent ice c tropical rainforest d temperate deciduous forest
asked by pkd 
biology
phytoplankton> krill> squid> sea lion> killer whale which of the following would most likely be eradicated by the bioaccumulation of PCBs in the food chain shown above? a krill b squid c sea lion d killer whale
asked by pkd 
chisquare test
Discuss the assumptions for using a chisquare test. Research articles from the Ashford Library and provide practical examples from the research to support your assumptions. Include a citation of one article you used for your research
asked by wallic 
8th grade math
I have no idea how to solve this problem. Can someone help me??? 3x+3y=6(this is a negative 6) 7x+4y= 1
asked by lila 
English
Can you please check these sentences for me? Thank you. 1)When you set the table, you place (lay) the table cloth, the napkins, the cutlery,the dishes (soup and a dinner plate),the vinegar and oil bottles, the salt and pepper pots on the table. 2)They
asked by Franco 
11th grade
The answer I get for the problem 3 1 4 _____  ____ = ___ 3x9 x3 9 is 4/0 which is undefined. Am I doing something wrong or could this answer be right?
asked by Taylore 
Physics
On a recent trip to a water park, you notice there is a new slide that you ride down a steep hill, then it carries you back up another ramp and shoots you into a pool. All the kids around you are saying that you leave the ramp at 50 m/s. If the initial
asked by Alex 
analysis variance
which analysis of variance should be applied when an experiment has more than one independent variable. Discuss the assumptions and limitations of the analysis of variance in comparison with the t test including a discussion of post hoc tests
asked by wallic 
arithmetic
What is the use of arithmetic progression in a circular race track? Please answer soon !
asked by Mohit 
chemistry
Calculate the volume of 0.1 molar hydrochloric acide solution required for titration of 20 ml of 0.5 molar sdium carbonat solution till complete reaction
asked by Anonymous 
English
Can you check this sentence please? He had such a fair complexion that if he were cut he would bleed white. He had short sandy hair and freckles on his forehead.
asked by Franco 
Math 20 measurement
Please check to see if I'm even doing this right. A cylinder has a volume of 1000 cm^3 ± 2% and a height of 100cm ± 1%. What is the radius of the cylinder? Report your answer with the appropriate percentage error.Here's my work: volume = [980, 1020]
asked by karri 
Math Problem Solving
6n+(8n2n)+3 ____________ 2 simplfy this expression
asked by Ian 
math
how do you go about finding yintercept and the slope for the equation 2y+3y=21
asked by o. 
physics
i posted this question before however i did not understand drwls explanation. anybody else want to try ? Sam tosses a ball horizontally off a footbridge at 3.1 m/s. How much time passes after he releases it until its speed doubles?
asked by tj 
Math Problem Solving
6n+(8n2n)+3/2
asked by Ian 
Math Problem Solving
6n+(8n2n)+3/2
asked by Ian 
Spanish
How do I say I'm wearing black pants? "Llevo pantalones negro." or do I have to add an "s" to negro? Thank you
asked by Melissa 
pre calc
simplify: 2^x X 2^y +2^x X 2^y + 2^x X 2^y + 2^x X 2^y
asked by Bill 
us history
Our frame of reference _____. definitely makes us objective and openminded stops us from having obstacles in our approach to reading limits how we view the world, and comprehend meaning
asked by Anonymous 
chemistry
рассчитайте константу равновесия реакции РСl5газ↔РСl3газ +Сl2газ при некоторой температуре,если известно, что к моменту наступления
asked by lisa 
9th grademaths
explain mid point therom
asked by darshana sundar 
chemistry
Comper the size of the sodium,carbon(in the dextrose), nitrogen, and silver atoms.list them in order of smallest to largest.?
asked by Anonymous 
math
If m+3n =20 and p =7, then 4m+12n +3p=
asked by mary 
physics
a lot of ppl in my science class have trouble with this problem... pls show your work if you know how to solve it. A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when
asked by kaylee 
GENERAL ART
HOW DO YOU DRAW 3 D BOXES
asked by BOB 
Chem
Determine mass of KCI created when react 35.7 g of K w/ unlimited amount of CI2
asked by Jess 
algebra
PLEASE HELP ME WITH 9X=2X+14
asked by Anonymous 
biology
what ecological hierarchy level is being considered in an ecological study that observes the impact of the mountain pine beetle on the lodgepole pine in british columbia?
asked by pkd 
us history
who is sabeen/sabine?
asked by chris buche 
Social Studies
Who was the first person to figure out the map? Who was the first American to figure out the map?
asked by Selena 
English
I forgot to include the following four sentences. 1)In my village there isn't a market. There is one in the next village called "Piave" and it is held on Monday mornings. 2)My parents always complain about my untidiness 3)I do the washingup using a
asked by Franco 
French
Hi, I'm wondering if any of you could lead me to the mark scheme for the IGCSE French Reading and Directed Writing Paper 23 May/June 2010? Any help would be appreciated. Thank you.
asked by anon 
quotes
what does it mean when they say "i love you till infinity" ? does it mean that person's love is endless?
asked by alanaR. 
math
If you add 9 to me and then subtract 6, you get 7. What am I?
asked by Kim 
Spanish
Could someone help me please? Which of the following says "some strong men" in Spanish los hombres fuertes unos hombres fuertes I think it is unos hombres fuertes becuase the los hombres fuertes states the strong men, doesn't it
asked by Melissa 
earth
the blank is located between the island? what is in the blank?
asked by gabby 
biology
does denitrification occur in root nodules of legumes?
asked by pkd 
art
what is scgraffito?
asked by kornella