Questions Asked on
September 19, 2009

physics
The height of a helicopter above the ground is given by h = 3.40t^3 , where h is in meters and t is in seconds. After 2.05 s, the helicopter releases a small mailbag. How long after its release does the mailbag reach the ground?
asked by Anonymous 
chemistry
how to calculate delta h for the reaction 2B(s)+3H2(g)arrow B2H6(g)given the following data: 2B(s)+3/2O2(g)arrowB2O3(s) deltaH=1273kj B2H6(g)+3O2(g)arrowB2O3(s)+3H2O(g) deltaH=2035kj H2(g)+1/2O2(g)arrowH2O(l) deltaH=286kj H2O(l)arrowH2O(g) deltaH=+44kj
asked by georgina 
physics
Secretariat ran the Kentucky Derby with times for the quarter mile of 25.2 s, 24.0 s, 23.8 s, and 23.0 s. (a) Find his average speed during each quartermile segment. (b) Assuming that Secretariat's instantaneous speed at the finish line was the same as
asked by Anh 
Science
suppose that you are given hand specimens of the carbonates calcite and dolomite. described two tests that would allow you to identify the samples. can someone help me on the question. plz and thank you
asked by iNeedHelp 
Science
can someone help one this question? suppose you are given two liquids and told that one is a compound and the other is a mixture. how might you determine which was which? describe one method you could use. please and thank you
asked by iNeedHelp 
chemistry
SrH2 (s)+ 2H2O (l) >>> Sr(OH)2 (s) + 2H2 (g) Calculate the mass of hydrogen gas that can be prepared from 5.22 grams SrH2 and 4.35 grams of H2O. I keep getting 0.729 grams but its wrong...
asked by Some kid 
niagra falls geography
what are the physical& human features of the Niagra falls
asked by sirana loni 
English
A question from Sir Knight and the Green Knight After the Green Knight addresses King Arthur and his Knights, King Arthur says, "By Heaven, Sir, your request is strange". What is the Green Knight's request?
asked by Rick 
Physics (Trig Bit)
A boy and a girl carry a 12.0 kg bucket of water by holding the ends of a rope with the bucket attached at the middle. FI tehre is an angle of 100.0 degrees between the two segments of the rope, what is the tension in each part? I do not understand the
asked by Physics (Trig Bit) 
Chemistry
The acidbase reaction between phosphoric acid, H3PO4, and calcium hydroxide, Ca(OH)2, yields water and calcium phosphate. For each mole of calcium phosphate produced by this reaction, how many moles of water are also produced?
asked by Anonymous 
spanish
I have to fill in the blanks using ser, estar and tener and Im having trouble with a few can somebody help me please. Ana y yo____bajas. Vosotros____buenos. Uds._____simpaticos Donde____mis cosas? De donde_____usted?
asked by Jasmine 
chemistry
How many milliliters of 0.418 M HCl are needed to react with 52.7 g of CaCO3? 2HCl (aq) + CaCO3 (s) >>> CaCl2 (aq) + CO2 (g) + H20 (l) I got .00252 mL but its wrong. This is what I did: 52.7 g x (1 mol CaCO3/100.09 CaCO3) x (2 mol HCl/ 1 mol CaCO3)= 1.05
asked by Some kid 
math
two joggers start at the same time from opposite ends of a 10km course. One jogger is running at 6 km/h and the other is running at 10 km/h. How long after they begin will they meet?
asked by taylor 
physics
Sally travels by car from one city to another. She drives for 24.0 min at 63.0 km/h, 36.0 min at 45.0 km/h, and 44.0 min at 49.0 km/h, and she spends 13.0 min eating lunch and buying gas.
asked by berha 
physics
If you are holding a dumbbell in your hand, there are three forces acting, Weight of the arm pulling the arm down, a tension force that the muscle in the shoulder exerts on the arm, and the force that the dumbbell exerts on the fist.. which of these forces
asked by sara 
physics
A passenger walks from one side of a ferry to the other as it approaches a dock. If the passenger's velocity is 1.70 m/s due north relative to the ferry, and 4.5 m/s at an angle of 34.0° west of north relative to the water, what are the direction and
asked by Anonymous 
chemistry.
A chromium compound 28.4% by mass of sodium 32.1% by mass of chromium, the rest being oxygen. Determine the empirical formula of the compound?...Can any one help me for that?
asked by Ochaya 
physics
A large conducting plate of area equal to 4.0 m^2 has an evenly distributed surface charge of + 3.4 micro coulomb on its surface.A point charge of mass equal to 5.3 x 10^6 kg and carrying a charge of 1.2 nC is held at 10 cm above the center of the
asked by sandhu 
physics
A thin ring of radius equal to 25 cm carries a uniformly distributed charge of 4.7 nC. What is the electric field and potential difference at the center of the ring?
asked by sandhu 
com 220 essay writing
what are some examples of bias, fallacies and specific rehortical devices in the Citizen kane speech. how did the speaker address arguments and counter arguments? were the speakers arguments effective? I just need help with the last part about
asked by chris 
AP English
Can I get an opinion on the following paragraph I wrote? This is a paragraph analyzing rhetorical strategies in Abraham Lincoln's Second Inaugural Speech. Lincoln addresses firmly that the sooner the Civil War will come to an end, the sooner Americans can
asked by Anonymous 
MATH 157
List the elements in the sample space of this experiment: a 6 sided die is rolled. the sides contain the numbers 1,2,3,4,5,6. list the sample space of rolling one die.
asked by ggift 
physics  HELP
A car accelerates at 2.25 m/s^2 along a straight road. It passes two marks that are 27.8 m apart at times t=3.80 s and t=5.25 s. What was the car's velocity at t=0?
asked by Anonymous 
MATH 157
If an 8 inch wide rectangle is to approach the golden ratio, what should its length be?
asked by ggift 
Physics
A car is traveling over the top of a hill, which we will model to be a piece of a circular arc of radius R. For each case below, draw careful toscale motion maps and use them to construct the velocity vectors at the following three points: the top of the
asked by Sonya 
Physics
(a)A car travels exactly once around a circle of radius 5.0 m at constant speed of 3.0 m/s. What is the car’s average velocity (magnitude and direction) during this interval? Explain/justify. (b)Repeat the calculation of average velocity if the car
asked by Sonya 
physics
A particle moves along the xaxis according to the equation x = 50.0t + 10.0t^2, where x is in meters and t is in seconds. Calculate the average velocity of the particle during the first 2.30 s of its motion.
asked by Anonymous 
math
In a science class of 16 students, 11 are on the basketball team, and 7 are on the track team. What is the least number of students in this class who are on both teams? I got 2, is that right?
asked by Michael 
math
How many different integers can be expressed as the sum of three different numbers in the set (1,2,3,4,5,6,7)? Can anyone explain this one to me??? Thank you!
asked by Michael 
Statistics
The Econ Dpt final has 30 questions that are multiple choice. There are 5 possible answers. If you guessed the answers to all the questions, how many would you expect to get right. Choices are 6, 7.5, 7?
asked by Jennifer 
history during the lives of early people
I need help in how I can approach this assignment,so that I cover all the areas that are to be included and still write an interesting and quality paper, showing the ways of life during this time in history. The assignment reads like this:You are to write
asked by Andy 
physics  HELP
A parachustist jumps from an airplane and freely falls y=51.8 m before opening his parachute. Thereafter, he decelerates at a=1.86 m/s^2. As he reaches the ground, his speed is 3.04 m/s. a)How long was the parachutist in the air? b)At what height did the
asked by Anonymous 
physics  HELP
A very silly person, intent on catching pigeons on the roof of an apartment building, trips and falls a distance of 43.0 m. She lands on a metal garbage can, crushing it to a depth of 0.457 m and walks away without having been seriously hurt. What
asked by Anonymous 
algebra
how to factor 8x^3+27?
asked by chekosm 
physics
A large conducting plate of area equal to 4.0 m^2 has an evenly distributed surface charge of + 3.4 micro coulomb on its surface.A point charge of mass equal to 5.3 x 10^6 kg and carrying a charge of 1.2 nC is held at 10 cm above the center of the
asked by sandhu 
Physics
A thin ring of radius equal to 25 cm carries a uniformly distributed charge of 4.7 nC. What is the electric field and potential difference at the center of the ring?
asked by sandhu 
math
(5x)+14=14+(5x)is this associative property of addition?
asked by natasha 
American History
If Governor George Wallace Was Alive During Reconstruction, What Would His Plan For The South Be After The Civil War? I am taking on the roll of Wallace in a Reconstruction Roundtable and i need help answering this.
asked by Jake 
Economics
1. What effect would a decrease in consumer savings have on the aggregate demand curve? The curve would level off. The curve would shift to the right. The curve would shift to the left. The curve would not change 2. If there is an increase in aggregate
asked by Chris 
physics
A very silly person, intent on catching pigeons on the roof of an apartment building, trips and falls a distance of 43.0 m. She lands on a metal garbage can, crushing it to a depth of 0.457 m and walks away without having been seriously hurt. What
asked by Anonymous 
trig
I'm trying to see if the teacher didn't give us the right problem or if I'm just not getting it. The problem is "rewrite the expression without a fraction: 4/(1sin x)". I can do it if the problem is sin squared x but I don't know how to solve the problem
asked by Priscilla 
physics
A car accelerates at 2.25 m/s^2 along a straight road. It passes two marks that are 27.8 m apart at times t=3.80 s and t=5.25 s. What was the car's velocity at t=0?
asked by Anonymous 
chemistry
Potassium permanganate reacts with sulfuric acid as per the equation shown below. Indicate the excess reactant after the reaction of 7.60 g KMnO4 and 10.32 g H2SO4. 4 KMnO4 (aq) + 6H2SO4 (aq) + 2K2SO4 (aq) + 4MnSO4 (aq)+ 6H2) (l) + 5O2 (g) I have no idea
asked by Some kid 
math
There is a rectangular piece of land that measures 40ft by 70 ft in the middle there is a square sandbox that is 6 ft on each side the rest of the land is covered in grass what percent of the land is covered by grass rounded to the nearest tenth of a
asked by p 
writing messages
informative,negative,positive messages
asked by Anonymous 
Algebra
Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour, and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office
asked by Jerry 
math
1. kristi jogged for 3/5 of an hr,swam 1/2 of an hr, rode her bike 3/4 of an hr how long did she exercise?=1 7/20 2.the intersest rate on an equity line of credit was 7 7/8% last month this month the interset rate is 10 3/2% how many percentage points has
asked by p 
Government
What are 15 ways in which the US government helps us in our daily lives? Local, state, and federal?
asked by . 
math
lcm of 150,36,245 =44100 ?
asked by p 
Trigo!
Ok, i did this maths trigo question, that says sinxcos=2/3. I squared it on both sides to get sin2x=5/9 and did the sum. In the end i got two solutions, 16.9 and 73.1. However, when i substituted the answers back into the equation, only one of the 2
asked by help! 
chemistry
How many moles of excess reactant are present when 3.50 x 10^2 mL of 0.216 M sulfuric acid reacts with 0.510 L of 0.202 M sodium hydroxide to form water and aqueous sodium sulfate?
asked by larry 
math
There is a rectangular piece of land that measures 40ft by 70 ft in the middle there is a square sandbox that is 6 ft on each side the rest of the land is covered in grass what percent of the land is covered by grass rounded to the nearest tenth of a
asked by p 
social studies
do i have to do all my homework its so hard! i hate this! i hate this subject!
asked by miley 
writing
how do i write a rough draft using apa style format for a project mananger
asked by james 
math
I have to put these estimates on a circle graph. These are estimated deaths in canada in 1996. Do I add them all up first then divide them by the answer? murders 510 alchcol 1900 car accidents 2900 suicides3900 Tobacco 45,000
asked by sophia 
11th grade
Is malleability an extensive property or an intensive property? Explain.
asked by stephany 
7th grade
Truck Company charges $40 per day & an additional $2 for each mile driven. Make a table of the charges for renting a truck for 5 days and driving it 0.25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, and 300 miles.
asked by Sharon 
latin
what is the latin abbbreviations for speak at will, and the rest, against, afterthought, and others, take this, and which see? what is the meaning of the latin words ad lib, vs, cf, and q.v.
asked by anthony 
physics
A parachustist jumps from an airplane and freely falls y=51.8 m before opening his parachute. Thereafter, he decelerates at a=1.86 m/s^2. As he reaches the ground, his speed is 3.04 m/s. a)How long was the parachutist in the air? b)At what height did the
asked by Anonymous 
physics
Tension is: A contactfree force A contact force A specific form of energy A pressure value corrected for the air pressure
asked by Hannah 
math
sove for x. 1. 2/3(x+4)=8 round the results to the nearest tenth and then to the nearest hundredth: 2. 57.124/10.104 3. 13.254(3.145)
asked by naz 
Algebra I
The sum of three numbers is 147. The second number is 4 more than two times the first number. The third number is five less than three times the first number. Find the three numbers. Can you please solve it? I have no idea how to do this. Thanks a lot for
asked by katya 
math
just want to chack my answers: 1. Find the least common multiple of 3, 6, and 9. A36? 2.Add. Write the answer in simplest form.3/11+9/11+1/11= 1 2/11? 3.Four buttons have diameters of 5/8,3/4 ,9/16 ,7/8 and inches. Which button is smallest? A~9/16?
asked by A~ 
business
with what information do I use to create an table that lays out a daybyday plan to use as a job aid for an employment search, spanning 3 weeks?
asked by Anonymous 
socials
charles I and the civil war 2 164249 what advantages had the king? nobles and country squires made good horsesoldiers. They brought the men on their estates into battle for the king, and Rupert,the king's nephew, was an excellent cavalry leader. this is
asked by sara 
Criminal Justice
why organization is important to the effectiveness of the police department. Topics include the following: area purpose and time
asked by Amanda 
algebra
F=G((mM)/(d^2)), solve for d
asked by Eleonora 
math
F=G((mM)/(d^2)), solve for d I need to know the steps, so I know how to do it in the future. Thanks
asked by Elie 
english
what is the purpose for writing of plymouth plantation by william bradford?
asked by bindiya farswani 
College Algebra
Knowing the given conditions, write the equation of the circle. Center at (5,3) and tangent to the yaxis.
asked by Adrian 
spanish
who wrote don quijote?
asked by reymond 
Technology
I need help with my entry essay, "The Twentieth Century brought an explosion of discoveries and inventions in math, science, and technology. Choose one such discovery or invention, identify it, and name the people responsible. Then explain how this
asked by Aaron 
ap chemistry
give an example of an organic compund made from inorganic substances
asked by Izzy 
math
Which chart would be more effective a bar graph or pie chart?
asked by candy 
MATH
Show that if the equation of the line can be written as x/a + y/b = 1, then the line intersects the xaxis at (a, 0) and the y axis at (0,b). i`m lostt.
asked by DiANA 
essay
I am writing an essay for school and I need some more ideas about why do we need healthcare? can you give me some ideas how to start it off to make a very good essay
asked by chris 
chemistry.
Deduce the number of each subatom particle in an atom of 84Kr?.
asked by Cool boy. 
math
It takes 125 identical wooden cubes to fill a cubical box. How many of these cubes does it take to cover the bottom of the box? Could someone explain this one to me?
asked by Michael 
math
can you check please/ 1.Rochelle purchased an appliqance that cost $815.56 with interest included. She paid $250.00 as a dwn payment and agreed to pay the remainder in 18 monthly payments. What amount will she be paying per month? =31.42 2.find the
asked by p 
Math thanks, Reiny
Thanks Reiny!
asked by Michael 
science
what is the similarities and difference between an igneous rock and a metamorphic rock? please help and thank you =)
asked by help 
Ecology
A space can hold a maximum of 256 paramecia before overcrowding. The paramecium undergoes 8 cell divisions before overcrowding. Suppose that the paramecium takes 2 hours to divide one, how many hours will it take the paramecium to reach maximum capacity?
asked by Brooke 
math
can you check please/ 1.Rochelle purchased an appliqance that cost $815.56 with interest included. She paid $250.00 as a dwn payment and agreed to pay the remainder in 18 monthly payments. What amount will she be paying per month? =31.42 2.find the
asked by p 
english canterbury tales
I took a practice quiz from an online site and I cant figure out these three quotes  the person they were said about is at the end of the quote. 1. This little proverb he would add thereto That if gold rust, then what will iron do?' parson 2. 'A thumb of
asked by sam 
french
Hi, I just have these few sentences or fragments that I cannot figure out whats wrong, can someone help? J¡¯ai assist¨¦ ¨¤ six semaines programme ¨¦t¨¦ au RISD (I attended a six week summer program at RISD) ! Je n'ai pas vu beaucoup de lieux
asked by French Help please! 
social studies
what impact did the establishment of french and dutch colonies in north america have on native americans?
asked by ac 
world history
(This is not a homework question just curious) Did Christopher Columbus change the lives of the native americans
asked by Carrie 
Physics
Could someone tell me the formula for finding distance when time is given and the acceleration is constant?
asked by Anonymous 
physics
A baseball pitcher throws a ball with a maximum speed of 150. km/h. If the ball is thrown horizontally, how far does it fall vertically by the time it reaches the catcher's glove 20. m away? Give your answer numerically in meters using decimal notation
asked by Michael 
Math
Solve the equation using order of operations. 22+105+(37)+23+22+37+(105)
asked by Annia 
Science
What is the Newtons Laws
asked by Madison 
accounting
Review the following illustrations found in Ch. 6 of your text: 612, 615, 617, 618, 619, & 620. Write a 350 to 700word paper, using APA guidelines, that addresses the following: o Explain the components of costvolumeprofit
asked by lady 
gr.10 math!
factor the equation: 6x^2+15x+36 please show me the steps in answering this problem. thanksss..)
asked by Saira 
religion
How do contemporary Buddhist practices reflect the foundations of the religion?
asked by ron 
socials
charles I and the civil war 2 164249 name a parliamentary victory of 1644 on july 2nd 1644 when the royalist forces were busy cooking their suppers, the roundheads made a surprise attack , scattered the royalist forces and won the vital battle of marston
asked by sara 
Physics
A spaceship approaches Starbase Beta with an initial velocity moving in the +x direction. The ensign sets the ship’s computer to initiate a braking program starting at time t = 0. After this time the computer controls the ship’s xvelocity according to
asked by Sonya 
Trigo help!
Ok, i've tried this question, and it brings me to no answers. Please help! Prove the following: secY(1+tanY)=6cosecY my workings: LeftHandSide: secY + tanY/cosY = 1/cosY + sinY/cos^2Y =(cosY+sinY)/cos^2Y = ??? How should i attempt this question?? Am i even
asked by help! 
physics
Three vectors are given by = 1.0 + 3.0 + 4.7, = 2.0 + 2.0 + 4.0, and = 3.0 + 4.2 + 4.0. Find (a)·( × ) and (b)·( + ).
asked by blah 
science
What are two organisms that are classified in the same class will alwas be classifed in the same
asked by Camille 
hygiene
what is the ideal temperature for a freezer
asked by danielle drury 
health care
What role do health care workers play in determining quality care?
asked by jaackie 
Math
1) If you have an inhomogeneous, linear equation like f''(x) + f'(x) + f = x you can find the general solution by finding a particular solution (with no constants of integration)to this equation and adding it to the general solution to the homogeneous
asked by Sonya 
algerbra
what is 3x+45=62?
asked by lola 
Geography
How does Geography impact the lives of people?
asked by Troy 
scince
what does the cross in the warning signs mean?
asked by liam 
science
What does in science the 'cross' mean in the warning sounds?
asked by zack 
7th grade
what do geographers want to know about peoples movement?
asked by maxine 
religion
how does the typical person define the word 'Christian'?
asked by gregg 
religion
what do yuou think when you hear the word 1) jewish 2) muslim 3) christian 4) righteousness NO LINKS PLEASE all answers are appreciated
asked by NEED HELP 
art
I just need to know who made the'bauta mask"?
asked by lily 
U.S. History
What exactly were the colonists' reactions after the King issued the Proclamation of 1763? I know "shocked" and "feeling like they can't doing anything without England stepping in" are the obvious ones, but was there anything really specific? On the
asked by Nikki 
Criminal Justice
Should the government be able to give up its responsibility for the custody of an individual and engage in contracts with private organizations to provide privatization of prisons in jail?
asked by Sherri 
Math
Which is closer to 14%,1/6 or 1/8?
asked by Annia 
Math
What is the average of seven numbers if the average of the first two is 9 and the average of the last five is 15?
asked by Rebecca 
6th grade
Multiply 13*(7)
asked by Amber 
Microeconomics
How do u make a graph using type of prodution ABCDE automobiles 02468 and forklifts 30 27 21 12 0
asked by Eshanna 
Economics
Can it ever be wise to produce even if total cost exceeds total revenue?
asked by Jay Tillman 
Microeconomics
How do u make a graph using type of prodution ABCDE automobiles 02468 and forklifts 30 27 21 12 0
asked by Eshanna 
Microeconomics
How do u make a graph using type of prodution ABCDE automobiles 02468 and forklifts 30 27 21 12 0
asked by Eshanna 
History
Which amendment banned discrimination between genders?
asked by Don 
Algebra
Find the x and y intercepts: y=x^23
asked by Help 
psychology/english
what would you say is the definition of biological psychology?
asked by frankie 
geography
tips on how las vegas can conserve water?
asked by Abee 
Chemistry
? CaSO_4 + AlCl_3 > CaCl_2 + Al_2(SO_4)_3 How do I balance this equation so that there are the same number of sulfate ions on both sides of the equation?
asked by Cory 
MATH 157
Wouldn't you use milligrams to express the mass of a flower petal?
asked by ggift 
Trigo!
Ok, i've tried this sum a million times and i cant get an answer. Somebody please check my workings and tell me what i did wrong! Thanks! Given 4≤y≤6, find the value of y for which 2cos((2y)/3) + √3 = 0 Here's my workings: 2.666≤(2y/3)≤4
asked by help!