Saturday
April 19, 2014

Posts by sarah


Total # Posts: 3,751

Chemistry
What is the molar solubility of Fe(OH)3(s) in a solution that is buffered at pH 2.75? The Ksp of Fe(OH)3 is 6.3 × 10-38.

math
A recipe that makes 18 cookies calls for 3/4 cup of sugar. How much sugar is needed to make 24 cookies using this recipe?

Chemistry
What is the molar mass of 4.56grams of Benzoic Acid?

math
a monitor displays the graph y = sin 5x. what will be the amplitude after a dilation of 2?

math
Apply the rule (3x,3y) to the vertices of rectangle ABCD to get rectangle WXYZ.

psychology
b f skinner

math
maria teresa leftthe libray at 5:30pm and began biking at the ratee of 20km/hr. by what time had she biked 35 killometers?

Math
it is still 0

elementary calc
f(x) passes through (0,2). the slope of f at any point is 3 times the y-coordinate. find the derivative at 1

health
i need a critical thinking question about bulimia for my psych class.

Chemistry
What is the pH when 3.46 mL of 2.37 M KOH is added to 26.9 mL of a 1.78 M solution of formic acid (HCOOH)?

7th grade math
Apply the rule (3x,3y) to the vertices of rectangle ABCD to get rectangle WXYZ.

geometry
The measure of an angle of a parallelogram is 12 degrees less than 3 times the measure of an adjacent angle. find the measure of all the interior angels of the parallelogram.

chemistry
Calculate the concentration of oxalate ion (C2O42−) in a 0.175 M solution of oxalic acid (C2H2O4). [For oxalic acid, Ka1 = 6.5 × 10−2, Ka2 = 6.1 × 10-5.]

Pysics
the average speed of light slows to 0.75 when it refracts through a praticular piece of plastic. a. what change is there in the light's frequecny in the plastic? b. in its wavelength?

Calculus for Business students
A hospital performs 3 types of operations. The first type takes 30 minutes, and they charge $700 for it. The second type takes 1 hour, and they charge $1050 for it. The third operation takes 2 hours, and they charge $1400 for it. The hospital can schedule up to 75 total operat...

english 101
review the concept of fallacies and suggest ways to avoid fallacies in your expository essay on healthy eating.

physics
Help me please to Find the tension in the two wires that supoort the light fixture. M=13 kg, è=43 degrees???!!

History
Can you explain to me what his question is asking please? How did this person change the outlook or the expectations of his/her field or endeavor?

History
What was the attitude climate/situation surrounding the Clara Bow's/political life?

calculus
Consider f(x)=3*2^x find the rate of change between X=1 and X=4

History
What caused the US to enter the Spanish American War and WWI?

Physics
A cube of mass M=0.703 kg is placed on an incline and given a push. It slides down, and its speed down the incline is measured at two positions, [1] and [2] on the diagram below, with V1 = 0.923 m/s and V2 = 1.207 m/s. Note that the incline passes through at least two grid int...

Physics
Ok here is where I have got so far. Tan (theta) = .38m/1m theta = 20.807 deg Sum Fy=mg*sin(theta)-Fn=ma=0 .703kg(9.81)*sin(20.807)-Fn=o Fn=2.45N Sum Fx=mgcos(theta)-Ff=ma .703(9.81)*cos(20.807)-mk(2.45)=.703*a This is where I am stuck

Physics
A cube of mass M=0.703 kg is placed on an incline and given a push. It slides down, and its speed down the incline is measured at two positions, [1] and [2] on the diagram below, with V1 = 0.923 m/s and V2 = 1.207 m/s. Note that the incline passes through at least two grid int...

Physics
Three masses, M1= 4.1 kg, M2= 4.1 kg, and M3= 6.7 kg are made of the same material. They are on a horizontal surface and connected by massless strings. The system accelerates to the right at 2.47 m/s2 due to an external force F pulling on M3. Given that T1 is 20.22 N, calculat...

Physics
A group of Mechanical Engineering students are attempting to pull a large crate of mass M=175.0kg on a level driveway. The coefficient of static friction ms = 0.610. They use a rope of dubious quality to pull the crate as indicated in the figure. At what angle with respect to ...

physics
A mass of 8.10 kg is suspended from a 1.69 m long string. It revolves in a horizontal circle as shown in the figure. The tangential speed of the mass is 2.92 m/s. Calculate the angle between the string and the vertical.

math
Use the discriminant to determine whether the following equations have solutions that are: two different rational solutions; two different irrational solutions; exactly one rational solution; or two different imaginary solutions. x^2=3x-6

Algebra
Solve using qaudractic formula.Then use a calculator to aproximate to three decimal places,the solution as rational numbers x^2-4x+1=0

Art Appreciation
Compare Manet's Olympia to Millais's Opheia. How each work represents the artist and his period.

Homophones/ 8th grade English
Monday

US History
With the knowledge of hindsight, what suggestions would you make to the Big 4 at Versailles in 1919?

Math
We're supposed to be using the "substitution method"? So, what would the answer be for: 6x-y=-4; 2x+2y=15 (_,_)

History
Could you give me a link on: Why the United States was so concerned about Japanese expansion into Southeast Asia?

History
Thank You:)

History
Can someone describe the relationship between Japan and the United States in the late 1930s and early 1940s.

AP Physics PLEASE HELP DUE TOMORROW
Consider the freight train. Suppose 15 boxcars pass by in a time of 14.0 s and each has a length of 14.0 m. (a) What is the frequency at which each boxcar passes? (b) What is the speed of the train?

poetry
I have to write a sonnet including one metaphor, one similie, two examples of a sound device such as an alliteration, consonance or assonance, and one example of enjambment. It may also include allusions, metonymy, synecdoche or allusion I am doing a Elizabethan Sonnet This is...

Physics
Read each statement below. For each situation, calculate vi, vf, pi, pf, the impulse vector F􏰁t, and the amount of force needed for the change to occur. All situations refer to a truck with a mass of 2840 kg. 1. The truck has a velocity of 8.30 m/s and comes to a stop...

Physics
Skater N, 58.9 kg, is moving north at a speed of 7.8 m/s when she collides with Skater E, 72.6 kg, moving east at 3.5 m/s. The two skaters are stuck together. In what direction and with what speed do they move after the collision?

Physics
Skater N, 58.9 kg, is moving north at a speed of 7.8 m/s when she collides with Skater E, 72.6 kg, moving east at 3.5 m/s. The two skaters are stuck together. In what direction and with what speed do they move after the collision?

English
The patient talked about his childhood on the psychiatrist’s couch.

English
Edit for proper grammer Neither of the textbooks contain the answer to the test question.

algebra
Subtract (1.5x^3+4.8x^2-3.7x)(-4.3x^3-4.5x^2+32)

algebra
u-^8 positive exponent

algebra
54r^14 -3r^7 find quotient

chemistry
1.when the concentraion of acetone was doubled, the time was about _____ the original time and the rate was about _______ the original rate. 2.when the concentraion of H+ was doubled, the time was about _____ the original time and the rate was about _______ the original rate. ...

chemistry
What is the density of sulfur dioxide gas at 25 degrees celsius and 754 mm Hg?

earth
Lithosphere:rigid Asthenosphere:flowing rock Lower Mantle:solid Outer Core:liquid Inner Core:solid You may want to check the lower mantle but the others are right. :)

Math geometry
Sorry for the confusion but my bro looked at the picture and helped. It would've been easy if u could've seen the pic. Sorry again!!!!! :(

Math geometry
there's a picture but i don't understand because that IS all the info that they gave me. there is no numbers, just that problem and the angle picture.

Math geometry
If ray AH bisects <GAB, find the measures of <GAH and<BAH. <GAH is acute and <BAH is obuse.

Math geometry
Thank you!!!!!!!!!!!!!!!!!! Life SAVER!!!!!

Math geometry
The midpoint of BC is M(-10,-16). One endpoint is B(-1,8). What are the coordinates of C?

chemistry
did you ever solve this?? because i need help on it too

Statistics
7.071?

Physics
I forgot to post the actual question: When the blocks are released, what is the acceleration of the lighter block?

Physics
A 1.7kg block and a 2.7kg block are attached to opposite ends of a light rope. The rope hangs over a solid, frictionless pulley that is 28cm in diameter and has a mass of 0.74kg .

science
hmmm... maybe you should post a question if you want help.

history
what is the missouri compromise (in not confusing words)?

Chemistry
Okay! Thank you for the help ! I got 6.80932 % ... is that correct?

Chemistry
Help! I need to do this review question and don't know where to start ! The label on a bottle of vinegar claims that the bottle conatins 5% (m/v) of acetic acid. In order to test this claim, a 50ml sample is titrated with sodium hydroxide. 166ml of 0.25 mol/l is added when...

Advanced Functions Math
Given the equation y=2^x, predict the equation for the graph that has been reflected in the y-axis. Given a vertical stretch by a factor of 5, translated 2 units right and 5 units down

English Grammer
Mary snuck out of her room as soon as her parents went to sleep. would this be correct?

English Grammer
Correct the incorrect verb form. Write the correct verb form in the space provided. Identify any sentence as correct. Bob speeded up his car when he saw the light turn yellow. would this be correct or would it be sped?

Physics
The coefficient of static friction between a block and a horizontal floor is 0.42, while the coefficient of kinetic friction is 0.17. The mass of the block is 3.9 kg. If a horizontal force is slowly increased until it is barely enough to make the block start moving, what is th...

Math
if 6 bugs are in a cage and you take away 70 but you need to divide that by 3, how many bugs would be left?

food styles of catering
At a cocktail party,you can expect the average person to eat how many hors d'oeurves in two and a half hours? A 8 B 10 C 15 D 20

Physics
A 300 g oscillator has a speed of 95.4 cm/s when its displacement is 3.00 cm and 71.4 cm/s when its displacement is 6.00 cm. What is the oscillator's maximum speed? Thank you!

Precalculus Someone help please
Evaluate the expression. [(3^-3)x(3^5)/3^-2]^-1/2

Chemistry
Specifically for hydrogen, explain the four basic colors in the visible spectrum (also infrared section and UV section) absorption spectra. Thanks.

physics;changes in temp
A 4.0 kg gold bar at 97C is dropped into 0.27 kg of water at 22C. What is the final temperature? Assume the specific heat of gold is 129 J/kg C. Answer in units of C.

Chemistry
An aqueous antifreeze solution is 40.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.05 g/cm3. Calculate the molality, molarity, and mole fraction of the ethylene glycol.

chemistry
Calculate the molarity and mole fraction of acetone in a 1.29 m solution of acetone (CH3COCH3) in ethanol (C2H5OH). (Density of acetone = 0.788 g/cm3; density of ethanol = 0.789 g/cm3.) Assume that the volumes of acetone and ethanol add.

english
An all expense-paid trip to Florida will be given to (whoever/whomever) wins the sales contest. This would be whomever? And...Please direct my inquiry to (whoever/whomever) is in charge of quality control. this would be whoever?

Math
change the fractions to all over 8ths. for instance 7*8 is 56+(1/4)= 58/8 now do the same for 3 3/8th

Math
Use linear combinations to solve the system of linear equations. 5x=4y-30 2x+3y+-12

english
Are these sentences correct or run-ons? Dogs run in packs; cats are more solitary animals. When Jeannie got home, her husband was preparing her favorite dinner.

health, safety, and nutrition for the young child
the corrent answer is D

Psychology
identify the major similarities and differences that exists between the American and European traditions of psychology. Please post a response to this message that includes at least two similarities and two differences

Physics
What rise in temperature occurs when 10g of steam at 100 degree celcius are passed into 400g of water at 10 degrees celcius taking the specific heat capacity of water to be 4.2J/gK and specific latent heat of vapourisation of steam to be 2268J/g

algebra
x^2+4x-47 x+8

algebra
divide polynominal

algebra
Divide 48x^9-24x^3=40x 8x

algebra
evaluate polynominal x=2 -3x^3+7x^2-3x-2

AP Psychology
please check: 1. the personalities of adopted children: a. similar to personalities of other children in adoptive families b. very similar to personalities of biologically related siblings c. not very similar to personalities of adoptive parents d. more similar to personalitie...

math
oh yea helpers correct lol

math
(-4c-12)2c -8c-24c

Philosophy
What is the fundamental difference between act utilitarianism and ethical relativism?

Literature
What are some of the poetic devices used in this poem by Gladys Cardiff? -diction -end-stopped -lyric -symbol -syntax Bending, I bow my head And lay my hand upon Her hair, combing, and think How women do this for Each other. My daughter's hair Curls against the comb, Wet a...

physics
A quarterback throws a pass that is a perfect spiral. In other words, the football does not wobble, but spins smoothly about an axis passing through each end of the ball. Suppose the ball spins at 5.8 rev/s. In addition, the ball is thrown with a linear speed of 17 m/s at an a...

Pre-Calc
So if the perimeter is 250 feet, draw a diagram. of three sides of a rectangle with a little river. Then label the two corresponding sides 'x' and the other side without a partner 250-x because the total P is 250 and you already used 'x' twice on the other side...

Physics Help!
can you show me the math for a and b because I keep getting the answer 2.90 N.

Physics Help!
A 1 kg object is located at a distance of 1.7 x 10^6 m fom center of a larger object whose mass is 7.4 x 10^22 kg. a. What is the size of the force acting on the smalle object? b. What is the size of the force acting on the larger object? c. What is the acceleration of the sma...

Physics
Hawaii gets 1.168*10^3 cm of rainfalll per year. Express this quantity in meters. Show work.

Math
How do I work this math prob. I always have a B and would like to bring it up. Caan you PLEASE help me with this prob. on unit rates "$2 for 5 cans of tomato soup"

Math
Perfect square 64/169x^2-225

Algebra-I really need help, please?
Thank you for the detailed example-I can really use those to figure out the rest of my homeowrk-I should be good now Thanks again

Algebra-I really need help, please?
I have to solve sqrt(2x-7) >=5 answers would be x>=16 x>=7/2 7/2<=x<=16 x<=16 I don't get this concept at all and I have 20 of these kinds of problems for homeowrk-can someone direct me how to start or give me an example or just help please? I really need...

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