Tuesday
October 21, 2014

Posts by sarah


Total # Posts: 4,201

physics
If the mass of an object was 0.500 kg and it started from rest, then the object's final velocity at the end of 0.86 seconds is ?
February 24, 2012

calculus
How many horizontal tangent lines exit to the curve f(x) = x^cos(x)?
February 23, 2012

calculus
You operate a bakery. You buy cakes from a supplier who charges you $5 per cake. Government regulations dictate that you can only charge a price between $10 and $20 per cake. Your research shows that if you were to charge $x per cake, you would sell 125 - x2 cakes per week. a...
February 23, 2012

calculus
Find an explicit expression for y' for the curve de fined by 3(x^2 + y^2)^2 = 100xy.
February 23, 2012

maths
(2x-3)^2
February 23, 2012

maths
multiply out (2x-3) squared eg small 2
February 23, 2012

writting a program
Speed of Sound. Sound travels through air as a result of collisions between the molecules in the air. The temperature of the air affects the speed of the molecules, which in turn affects the speed of sound. The velocity of sound in dry air can be approximated by the formula: &...
February 23, 2012

physics
Use the fact that a typical proton is spherical and has a diameter of 1x10^-13 cm and a mass of 1.67x10^-24 grams, compute density of a proton.
February 22, 2012

physics
Einstein saud that the amount of energy in matter is given by E=mC^2 where if m is in kilograms and c=3x10^8 which is the speed of light. The energy is E is given in Joules. Assuming that is takes an average of 1x10^11 Joules to heat your house during the year, calculate how ...
February 22, 2012

math
factorise 6m squared - 600
February 22, 2012

English
this is wht i have so far :( In the short story “The large Ant” by Howard Fast, Morgan kills an ant because his mind is set to act violently if he sees something unusual. It is human nature to be terrified and react without thinking about their action when something ...
February 21, 2012

English
I need a thesis statment for an esaay. I have read the short story "the large ant" but cant think of any thesis statment. Its about human nature and violance.
February 21, 2012

Calculus AB
I have to find the integral of (e^3lnx + e^3x)dx. Can someone help me?
February 21, 2012

Calculus AB
Oh geez two different answers.
February 21, 2012

Calculus AB
So then that could be moved around, and it would be (1-x)/(x-xy) ?
February 21, 2012

Calculus AB
I have to find y' if ln(xy) = x + y. Where do I start? I'm not sure what to do with that ln(xy)
February 21, 2012

CHEMISTRY
Find the amount of CuSO4.5H2O needed to prepare 500 mL of 0.25 M solution.
February 20, 2012

Art
I have been working on this. Here are my answers so far, can you please just double check them? 1. Alexander Calder invented this type of art. () fiber art (*) mobiles () stabiles () public art 2. Today, decisions in planning, selecting, and/or creating an artwork for public ...
February 20, 2012

Art
1. Alexander Calder invented this type of art. () fiber art () mobiles () stabiles () public art 2. Today, decisions in planning, selecting, and/or creating an artwork for public display are made in the following way. () They are the decision of the artist. () by collaboration...
February 20, 2012

chemistry
I got 28.26 for Mc....can someone confirm this answer and help me find the liters for the next part.
February 19, 2012

chemistry
In reverse osmosis, water flows out of a salt solution until the osmotic pressure of the solution equals the applied pressure. If a pressure of 47.0 bar is applied to seawater, what will be the final concentration of the seawater at 20 °C when reverse osmosis stops? Mc=? ...
February 19, 2012

Chemistry
I did what you said and didn't get the correct answer :(
February 18, 2012

Chemistry
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 10.7 g of biphenyl in 33.9 g of benzene?
February 18, 2012

statistics
64.8
February 18, 2012

Biology
Does the amplitude of QRS complex change with the pulse amplitudes? Why or why not? So I think that the amplitude of the QRS complex should cause the pulse amplitude to change, because the pulse pressure is determined by the force of contraction of the heart. Am i on the right...
February 17, 2012

health
what should be taken into consideration when cultural bias occurs in age care
February 16, 2012

NU
Determine the net force necessary to give an object with a mass of 3.4 kg an acceleration of 4.3 m/s2
February 16, 2012

math: elapsed time
find each elapsed time 1. 9:59P.M. TO 10:45 P.M.
February 15, 2012

math: elapsed time
find each elapsed time. 1. 9:P.M. TO 10:45 P.M.
February 15, 2012

physical science
A child pushes a book a distance of 17m. If 5J of work was done, how much force was used?
February 15, 2012

college physics
f=5000
February 14, 2012

CHEMISTRY
Write equations for the solution process when ech of the following is dissolved in water. Potassium phosphate glucose Calcium chloride 1-propanol Butanone Ammonium sulfite
February 14, 2012

CHEMISTRY
What will be the concentration if 52mL of a solution that is 12ppm in sodium chloride is diluted with enough water to make 97mL of solution?
February 14, 2012

math
what is equivalent fraction of 9/10 and 7/12
February 14, 2012

chemistry
I had the exact same question, but the when I tried the second equation, it was wrong.
February 13, 2012

chemistry
2.875 mol H2O = ___ g
February 13, 2012

Math
Nico is saving money for his college education. He invests some money at 5%, and $2300 less than that amount at 3%. The investments produced a total of $163 interest in one year. How much did he invest at each rate?
February 12, 2012

Chemistry
thanks for your suggestion. but maybe is it possible to use the titration method to determine whether or not the precipate would for form, for example, adding the large concentration of AgNO3 and NaCl which would cause the precipitate to form and then use those values obtained...
February 12, 2012

Chemistry
If very small concentrations of NaCl and AgNO3 are mixed, no precipitate forms. However, if large concentrations are mixed, a white precipitate forms. Can someone tell me a method for testing the hypothesis that "insoluble" salts would dissolve to some extent in ...
February 12, 2012

Algebra
the altitude of a triangle is 3m less than half its base. If the area of the triangle is 300 m^2 find the measure of the base.
February 11, 2012

chemistry
if 1.2x10^24 molecules of water freeze how much energy is released by the water according to the equation below? - H2O(l)-> H2O(s);ΔH=-6KJ
February 10, 2012

english
diagram follow sentence the children who are in the fifth row will have no homework tonight
February 9, 2012

Physics
A student argues that as a satellite orbits the earth in a circular path, it moves with a constant velocity and therefore has no acceleration. The professor claims that the student is wrong since the satellite must have a centripetal acceleration as it moves in its circular ...
February 8, 2012

physics
i want this too :(
February 6, 2012

intermediate algebra
$3,480 are 105% so you divide $3,480 by 105 and then multiply it by 100, because you want to know what amount it was before it was raised 5%
February 4, 2012

Physics
A cannon is fired from a cliff 190 m high downward at an angle of 21° with respect to the horizontal. If the muzzle velocity is 34 m/s, what is its speed (in m/s) when it hits the ground?
February 4, 2012

calculus
rotate about x=16
February 4, 2012

calculus
volume of the solid enclosed in y=square root of x y=0 and x=16
February 4, 2012

math
A 200-miles trip by an electric automobile must be completed in 4 hours. If it takes x number of hours to travel the first half of the distance, write an equation describing the average speed for the second half of the trip as a function of x for the 0<x<4.
February 3, 2012

math
0≥16 true or false
February 2, 2012

math,angles
thank you very much you are very help ful and so were these videos ...u guide me to where i need to be so i want to thank you ...not only for this but i am a straight A student with some guidence and its because of you so thank you :):)
February 1, 2012

math,angles
Could anyone help me with showing me how to bisect an angle
February 1, 2012

MATH
thats ok but thank you very much and once again sorry i was just a little uncomfortable sharing my name so thank you anyways ill have to ask my teachers assistance
February 1, 2012

Pre-Algebra with PIZZAZZ
It goes into negetives i think ...so 9 subtract 14 would be negetive five ...hope that helps.
February 1, 2012

Science
I do not need a link, just a straight up answer please. What are 3 saftey tips you can give me for 'Tornadoes'?
January 31, 2012

geometry/algebra
at 5pm a person 5 feet tall casts a 10 foot shadow. at the same time a flagpole casts a 40 foot shadow. what is the height of the flagpole?
January 31, 2012

English
I have to write a conversation between two characters from Groom Service by Michael Dorris(shot story)Is there is anyone who had read this story and wrote dialouge fot it? Please help :(
January 31, 2012

algebra
Find the equation using a slope-intercept form if possible.. x-intercept −1, y-intercept −2 I do not know how to start this.. HELP!
January 27, 2012

english
For English II I'm supposed to write a persuasive essay on a speech such as the "I Have A Dream Speech" or similar. I don't particularly care for King's speech. What are some other speeches I could use?
January 26, 2012

Physics
Some forms of cancer can be treated using proton therapy in which proton beams are accelerated to high energies, then directed to collide into a tumor, killing the malignant cells. Suppose a proton accelerator is 4.21 m long and must accelerate protons from rest to a speed of ...
January 25, 2012

Chemistry
Calculate the energy (in kJ/mol) required to remove the electron in the ground state for each of the following one-electron species using the Bohr model. (a) He+ kJ/mol (b) Li2+ kJ/mol
January 24, 2012

Science
Oh and sorry, I forgot to say thank you and please.
January 24, 2012

Science
Is the meaning of an application in science 'how is it used in the real world'? Yes or No. If no, please write what the real definition is, in 6th grade language for me to understand.
January 24, 2012

Chemistry
Calculate the energy (in kJ/mol) required to remove the electron in the ground state for each of the following one-electron species using the Bohr model. (a) He+ kJ/mol (b) Li2+ kJ/mol
January 24, 2012

Chemistry
A certain microwave oven delivers 633 watts (J/s) of power to a coffee cup containing 53.1 g of water at 25°C. If the wavelength of microwaves in the oven is 9.75 cm, how long does it take, and how many photons must be absorbed, to make the water boil? The specific heat ...
January 23, 2012

physics
Two particles each with charge +2.68 µC are located on the x axis. One is at x = 1.00 m, and the other is at x = −1.00 m. (a) Determine the electric potential on the y axis at y = 0.660 m. (b) Calculate the change in electric potential energy of the system as a ...
January 22, 2012

Algebra
You are making a scale drawing of a sailboat using the scale 1 inch: 3 feet. The length of nthe sailboat at its longest point is 36 feet and the height is 54 feet.What should the lenght and height of the sailboat be in your drawing?
January 22, 2012

physics
A 200.0 kg astronaut and equipment move with a velocity of 2.00 m/s toward an orbiting spacecraft. The astronaut will fire a 100.0 N rocket backpack to stop his motion relative to the spacecraft. (a) What acceleration is attained by the rocket backpack?
January 22, 2012

physics
(a) What is the acceleration of a car in m/s² that doubles its speed from 36.0 km/h in 5.00 s? (b) What net force acted on this car if its mass was 1,000.0 kg?
January 22, 2012

physics
In the Daytona 500 auto race, a Ford Thunderbird and a Mercedes Benz are moving side by side down a straight-away at 66.5 m/s. The driver of the Thunderbird realizes that she must make a pit stop, and she smoothly slows to a stop over a distance of 250 m. She spends 5.00 s in ...
January 21, 2012

Math
There are twenty balls in the bag. Twelve are white, six are orange and two are pink. When I draw a ball from the bag, I remove it. What is the probability that my first draw is a white ball and my second is not?
January 20, 2012

Physics
A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 11 m/s when the hand is 1.8 m above the ground. How long is the ball in the air before it hits the ground? (The student moves her hand out of the way.)
January 18, 2012

algebra
Solve the inequality. Express your solution using notation and please show all of your work. x^4<16x^2
January 18, 2012

algebra
Given the following function, find: (a) vertex (b) axis of symmetry (c) intercepts, (d) domain (e) range (f) intervals where the function is increasing, (g) intervals where the function is decreasing Please show all of your work f(x)=-7x^2-14x-3
January 18, 2012

algebra
yeah thanks
January 18, 2012

algebra
Given the equation x^2+y^2-8x-6y=0 (a.) Write the equation in standard form . (b.) State the center, radius, and intercepts.
January 18, 2012

algebra
Solve the following inequality and write answer using interval notation. Please show all of your work. 2x-5/3x^4-x^3+275x-125>=0
January 18, 2012

science
what are mass, matter, and volume and how are they related?
January 17, 2012

english realism and regionalism
3 questions for english??? Thank you!! In three to five sentences, explain how Ambrose Bierce's use of foreshadowing or flashback influence "An Occurrence at Owl Creek Bridge." (5 points) A. Regionalism is a form of Realism that emphasizes realistic settings, ...
January 16, 2012

Chemistry Problem!
Thanks a lot
January 16, 2012

Chemistry Problem!
What weight of sample containing 8.00 % Fe3O4 must be taken to obtain a precipitate of Fe(OH)3 that, when ignited to Fe2O3, weighs 150 mg?
January 16, 2012

Education
how should local schools respond to issues that might impact SEI instruction
January 16, 2012

chemistry
A helium balloon has a volume of 2.50L at STP. If it's released and rised to an elevation at which pressure is 0.285 atm, and the temperature is -35 degrees. What's the new volume?
January 15, 2012

Money
Thanks for the help. -Sarah
January 15, 2012

Money
It is possible for a company’s liabilities to exceed its assets. When this occurs, the owners’ equity is negative. Can this happen with market values? Why or why not? I thought that it would not happen since market value is the price that equity, liabilities, and ...
January 15, 2012

World History
d is the first i think second is a ?
January 14, 2012

World History
What was the cause of the peloponnesian war? A. Greeks sought revenge for the persian wars B. Sparta wanted control of the powerful athneian army C. Many greeks outside of athens resented athenian domination I got B. Around 700 B.C Athenians became unhappy with their form of ...
January 14, 2012

Physics
A streetcar named Desire travels between two stations 0.59 km apart. Leaving the first station, it accelerates for 10.0 s at 1.0 m/s2 and then travels at a constant speed until it is near the second station, when it brakes at 2.0 m/s2 in order to stop at the station. How long ...
January 14, 2012

World History
Both Hindus and buddhists believe in A. Many gods B.The caste system C. Formal rituals I got C.
January 13, 2012

spanish
please unscramble these spanish words " 1)cesla 2)utiels 3)asloresce 4)oclamih
January 13, 2012

World History
In the reading. What to do about the Christians?, the emperor trajan and pliny the Younger exchange legtters concerning the persercution of christians. From this exchange which of the following assumptions could NOT be made? A.Neither party knows much about the Christian ...
January 11, 2012

World History
In the reading. What to do about the Christians?, the emperor trajan and pliny the Younger exchange legtters concerning the persercution of christians. From this exchange which of the following assumptions could NOT be made? A.Neither party knows much about the Christian ...
January 11, 2012

Spanish
thanks, but i meant "toque" as in hat.
January 11, 2012

Spanish
How would I say "Where is your toque" in spanish. dónde está tu toque? not sure.
January 11, 2012

history
how do legalism and daoism differ? A)legalism emphasizes strict law and harsh punishment, and daoism emphasizes that a government that governs least is best. b)daiosm emphasizes personal salvation and leagalism emphasizes the a government that governs is least best. C)legalism...
January 10, 2012

Geometry Which Statement is True?
Which statement is true? All quadrilaterals are rectangles All quadrilaterals are squares All rectangles are quadrilaterals All quadrilaterals are parallelograms Thank You :)
January 10, 2012

World History
The effect of a new greek middle class emerging and challenging nobles for power was : A. Athenians appointed solon to make reforms B. A form of government called an olligarchy emerged C. The government moved toward democracy D. Economic reforms were introduced I got A. In the...
January 9, 2012

World History
How did the romans view greek culture, such as art, liturture, and philosophy, during the Greco-Roman period of civalization? A. The romans believed it was substandard B. The romans believed it will anger the gods and lead to mass distruction of there way of life C. The romans...
January 9, 2012

English
Yep, I go to connections too and it can be very stressful. So all you jerks that look down on us for trying to get answers online..... HELP US!
January 9, 2012

World history
How did the romans view greek culture, such as art, liturture, and philosophy, during the Greco-Roman period of civalization? A. The romans believed it was substandard B. The romans believed it will anger the gods and lead to mass distruction of there way of life C. The romans...
January 9, 2012

Pages: <<Prev | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | Next>>

Search
Members