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September 4, 2015

Posts by Julia


Total # Posts: 540

Chemistry
If you have 250 mL of 2 M of sodium sulfate diluted to make 0.500 M of sodium sulfate, how would you figure out the volume?
April 10, 2012

Physics
A dog, with a mass of 8.0 kg, is standing on a flatboat so that he is 26.8 m from the shore. He walks 8.6 m on the boat toward the shore and then stops. The boat has a mass of 36.0 kg. Assuming there is no friction between the boat and the water, how far is the dog from the ...
March 27, 2012

physics
Three identical uniform meter sticks are placed on the floor. The first stick lies along the y axis from y = 0.470 m to y = 1.47 m. The second stick lies along the x axis from x = 0.320 m to x = 1.32 m. The third stick is positioned so that one end is on the x axis at x = 0....
March 26, 2012

Math
how do you make this into an equation? whats the x and y intercept? She has two jobs, at her first job she makes $10 per hour, at her second job she makes $12 per hour. last week she made $440.
March 22, 2012

Algebra
how do you make this into an equation? whats the x and y intercept? She has two jobs, at her first job she makes $10 per hour, at her second job she makes $12 per hour. last week she made $440.
March 22, 2012

Geometry
The answer is 413 km.
March 19, 2012

Physics
If the scuba diver is looking from the water n=1.33 and the other man is above water so n=1, use the equation n1sin(theta)=n2sin(theta). 1.33sin(20)=1sin(theta) 27.06 degrees is the answer, but since it says from the horizontal do 90-27.06
March 17, 2012

Science
PLEASE HELP ME!!!!! Which requires more energy? Heating up a 350 mL cup of coffee from 25C to 65C? or Warming the surface of a Lake (2,000,000,000 mL) from 28C to 29C. and Prove your answer.
March 7, 2012

math
45 is the second answer to the second question.i don't know the first question
March 6, 2012

physical
Thank you for your help!!!
February 12, 2012

physical
Consider a pulse of laser light aimed at the moon that bounces back to earth. The distance between Earth and Moon is 3.8 x 10 (small eight above) m. Show that the round-trip time for the light is 2.5 s.
February 12, 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

math
L = 2w W = w A=Lxw 200= (2w) (w) 200 = 2w^2 200 = 2w^2 200 divided by 2 = w^2 100 = w^2 square root of 100 = w w= 10 Therefore the length is 20 and the width is 10.
January 29, 2012

chemistry
4 you dont count the end ones unless there is a decimal point
January 26, 2012

chemistry
solar flares containing hot gases can rise to 120000 miles above the surface of the sun. What is the distance in kilometers? how do i set this up??
January 26, 2012

anatomy
the nervous system is comprised of what two tissue types??
January 25, 2012

anatomy
the nervous system is comprised of what 2 Tissue types?
January 24, 2012

Pre-Calc-Please check
Is this correct? Using Rational Roots Theorem, list all possible rational root of f(x) = 2x^3 - 3x^2 + 5x+6 Possible roots are p/a = -+1, -+2, +-3, -+6. -+3/2
January 10, 2012

Pre-Calc-Please check
Number three should read p/q = not p/a Thank you for letting me know the first two are correct
January 9, 2012

Pre-Calc-Please check
I have three questions: 1. What is the remainder of (x^3 + 2x^2 - 5x+4) /(x-3) I think the answer is 34?? 2. Evaluate (4+5i)(2+2i) =4(2) +4(2i) + 5i(2) + 5i(2i) = 8 + 8i + 10i+10i^2(-1) =-2 + 18i 3. Using Rational Roots Theorem, list all possible rational root of f(x) = 2x^3...
January 9, 2012

catering
1. You're likely to encounter formal service in all of the following settings except which one? A. A gourmet restaurant B. A wedding C. A church outing D. A dinner party
January 3, 2012

Social Studies
Hi,My social studies test is coming and the review asks about the counter reformation in the age of exploration. But my Scott Foresman text doesn't say anything about the counter reformation. Where can I find out about it?
December 11, 2011

Algebra II
A projectile is launched from a platform 10 meters above ground with an initial upward velocity of 20 meters per second. Find the time when the projectile has returned to the initial height launch, find the time the projectile hits the ground, find the time when the projectile...
December 8, 2011

Algebra II
Thank you
December 5, 2011

Algebra II-Reiny please recheck
No the way I typed is is the way it is written-- 5 on top, sigma symbol in middle and k=2 on bottom with the equation (k^2-5k+2) to the right and the answers are possible: 4, -4, 2, -2 I'm not sure if I see (4) used above when you substituuted-is that the one not generated??
December 5, 2011

Algebra II
the 5 should be on top then the signma symbol in middle and the k=2 on the bottom with the equation (k^2 -5k+2) to the right of all of it
December 5, 2011

Algebra II
I solved one of these sigma notations and had Reiny check it in an earlier post but this one totally befuddles me- Which of the following terms would not be in the series generated by the expression: 5 Signma symbol (k^2-5k+2) k=2 the choices are 2, -2, 4 or -4If you could ...
December 5, 2011

Algebra II
Please help-I need to write 4+6+8+10 in sigma notation would it be sigma sign in middle (3) on top of sign, n=0 on bottom of signma notation and to the right it would be (4+2n) so it would look like-- (3) (sigma in middle) (4+2n) n=0
December 5, 2011

ordered fields
prove (3x^2 + 4x-1)/(7x^5+5)>0 is field. can you just prove one of the addition axioms?
November 30, 2011

Chemistry
I got error also
November 30, 2011

Chemistry
I'm stuck there too Ryan
November 30, 2011

Chemistry
A solution is prepared by dissolving NH3(g) in water according to the following equation. NH3(g) + H2O(l)=NH4^+(aq)+ OH^-(aq) If the pH= 9.60 what is the [OH-] in the solution.
November 30, 2011

Chemistry
q= 20.00 C =125.0g x 98.0 C x 25.80 C -20.00??
November 30, 2011

Chemistry
still dont get it
November 30, 2011

Chemistry
a coffee cup calorimeter normally consists of two nested styrofoam cups with a lid. a coffee cup calorimeter of this type contains 125.0 g of water at 20.00 degrees C. A 120.0 g sample of copper metal is heated to 98.0 degrees C by putting it into a beaker of hot water. The ...
November 30, 2011

geometry
They made a perfect pear
November 16, 2011

Chemistry
IS THIS RIGHT? Experiments were performed with four metals and solutions of their ions: A-A^+, B-B^2+, C-C^2+, D-D^2+. The results of the experiments were: D^+2 + C ---> No reaction B^+2 + C---> B + C^+2 A^+ + B ---> A + B^+2 a.) Write the equation for each reduction ...
November 7, 2011

math
i am having trouble with two digit dividends. here is an example 34 divided 264
November 1, 2011

Physics
A rock is projected from the edge of the top of a building with an initial velocity of 19.6 m/s at an angle of 31 degrees above the horizontal. The rock strikes the ground a horizontal distance of 77 m from the base of the building. The acceleration of gravity is 9.8 m/s^2.(...
November 1, 2011

physics
A rock is projected from the edge of the top of a building with an initial velocity of 19.6 m/s at an angle of 31 degrees above the horizontal. The rock strikes the ground a horizontal distance of 77 m from the base of the building. The acceleration of gravity is 9.8 m/s^2.(...
November 1, 2011

physics
A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials' boat pulls up next to the spy's boat, both boats reach the edge of a 4.8 m waterfall. The spy's speed is 16 m/s and the officials; speed is 26 m/s. ...
November 1, 2011

english
rewrite these sentences into reported speech. 1-where did you get these dress? 2-who did these dress belong to? 3-where do you buy your clothes? 4-how long have you been collecting these clothes? 5-what will you wear at the party? 6-why are you decorating the house? 7-what ...
October 25, 2011

math
Vin paid $60 for 4 new DVDs. His friend Samuel paid $78 for 6 new DVDs. Who got a better deal?
October 19, 2011

physics
A particle starts from the origin at t = 0 with an initial velocity of 5.5 m/s along the positive x axis.If the acceleration is (-2.8i + 4.1jm/s^2, determine (a)the velocity and (b)position of the particle at the moment it reaches its maximum x coordinate.
October 16, 2011

solid mechanics 1
a load P is supported
October 12, 2011

solid mechanics 1
a load p is supported by a steel pin that has been inserted in a short wooden member hanging from the ceiling. the ultimate strength of the wood used is 60 MPa in tension and 7.5 MPa in shear, while the ultimate strength of the steel is 145 MPa in shear. knowing that b= 40 mm...
October 7, 2011

spanish
what is the difference gramtically between these two sentences Necesitamos sillas más cómodas. Se necesitan sillas más cómodas.
October 5, 2011

chemistry
How many moles of carbon, hydrogen, and oxygen are present in a 100g sample of ascorbic acid?
October 4, 2011

science
Is volume the amount of space an object takes up?
September 25, 2011

MAth
rewrite it as an addition problem. -4.8 + 4.9 = what? And then add 5.7 to your answer of -4.8 + 4.9 and that would be your answer.
September 25, 2011

math
Nonr
September 22, 2011

physics
With an average acceleration of -.56 m/s2, how long will it take a cyclist to bring a bicycle with an initial speed of 13.3 m/s to a complete stop?
September 22, 2011

English
It would be a metaphor-is that correct?
September 20, 2011

English
1.What figure of speech is this? I think it is personification "Death stands above me, whispering low I know not what into my ear." simile litotes personification metonymy synecdoche 2.What figure of speech is this:The fog comes on little cat feet This one I hav no ...
September 20, 2011

Physics
A female gymnast weighs 400 N. If she is hanging stationary from a high bar, how many forces are acting on her?
September 11, 2011

science
design an expirament to test if the price of the gasoline affects the mileage in my car. find the dependent variable.
September 5, 2011

Science
bouyant force i think.
September 4, 2011

calculus
can you explain how you got both answers?
August 8, 2011

calculus
i dont understand the last step. how did you get to -1 + e^3 -1 = -2 + e^3
August 8, 2011

calculus
Find the sum of the series 2 + 9/2! + 27/3! + 81/4! . . .
August 8, 2011

Grammar
Unable to find her driver's license, Mary asked the agent whether a credit card would be sufficient enough evidence to prove her identity. Here, "sufficient enought" is the error. But I do not know why that is. Please explain in details! Thank you.
August 1, 2011

Chemistry :)
Balance the following redox equation and identify the element oxidized, the element reduced, the oxidizing agent, and the reducing agent. Show all of the work used to solve the problem. NO2- + Al AlO2- + NH3 Thanks :)
June 19, 2011

math
x+y+3z=600 x+y+z=400 1. In the system of equations above, what is the value of x+y? 2. There are 25 trays on a table in the cafeteria. Each tray contains a cup only, a plate only, or both a cup and a plate. If 15 of the trays contain cups and 21 of the trays contain plates, ...
June 17, 2011

grammer
firt grade, a diamante, noun, then two adjectives, then verbs ending in ed or ing, then related nouns, then more ing/ed verbs, adjectives, then noun.
June 13, 2011

grammer
what is a related noun? mom and i are stuck.
June 13, 2011

algebra
100.1
May 27, 2011

Chemistry
I forgot to add that in my experiment I used 1.2 grams of 10-52-10 plant food ( + 4 grams MgSO4 7H2O) and obtained 2.30 g of MgNH4PO4 6H20
May 27, 2011

Chemistry
need to calculate percent yield of MgNH4PO4 . 6H2O obtained in my experiment using 10-52-10 plant food label as a guide to determine the theoretical yield of MgNH4PO4 . 6H2O. My calculations so far: air dry weight of MgNH4PO4 . 6H2O = 2.30 g Grams of phosphorusin MgNH4PO4 ...
May 27, 2011

Physics
All right. Think of the trap door as a bar and draw a free-body diagram (FBD) with it as such. Assuming this is a uniform system, the center of mass will also be at the center of the door and that is also where gravity will be pulling on the door. Since the door is cocked at ...
April 27, 2011

Physics
A trap door, of length and width 1.65 m, is held open at an angle of 65.0 degrees with respect to the floor. A rope is attached to the raised edge of the door and fastened to the wall behind the door in such a position that the rope pulls perpendicularly to the trap door. If ...
April 27, 2011

stats
salary study conducted. mean for men = $42,000. Std deviation = $9,000. mean for women = $39,000. Std dev for women = 8,000. If 100 men surveyed, at a CI of 95% what is the the most number of women surveyed if there was no Statistical difference in the mean for men and women?
April 26, 2011

Algrebra
What goes into 12 that goes into 36? 4 goes into 12 3 times and into 36 9 times. This can be simplified again by 3s. 3 goes into itself 1 time and into 9 3 times. So, your final answer would be 1/3rd.
March 10, 2011

algebra 2
I am not sure what "Solve each system" means, but I would assume with the given information that you need to solve for "c", then solve for "d" with the answer to "c". To do that, your equation would look like this.... 3c+2(4) = 2 3c+8 = ...
March 10, 2011

Finance
Ms. Sue, thank you for sending me this link. I am having trouble putting the pieces together to fit my problem above. Could you perhaps expain it a little further?
March 10, 2011

Finance
A U.S. Firm wants to raise $10 million of capital so it can invest in new technology. How much will it need to raise in order to net $10 million, using the average costs of raising funds.
March 10, 2011

grade 4 math
thank you!
February 28, 2011

grade 4 math
is that the answer?
February 28, 2011

grade 4 math
Several friends are taking turns flying akite. Each friend flies the kite for the same amount of time.They spend 6 hours flying the kite altogether. Explain whatinformation you need to find how long each friend flew thekite for.
February 28, 2011

math
Tierra, Nico, and Alex had $865 altogether. Tierra spent 2/5 of her money. Nico spent $40,and Alex spent twice as much as Tierra. If the three had the same amount of money left, how much money did alex have in the begging?
February 24, 2011

math
Tierra, Nico, and Alex had $865 altogether. Tierra spent 2/5 of her money. Nico spent $40,and Alex spent twice as much as Tierra. If the three had the same amount of money left, how much money did alex have in the begging?
February 24, 2011

math
Tierra, Nico, and Alex had $865 altogether. Tierra spent 2/5 of her money. Nico spent $40,and Alex spent twice as much as Tierra. If the three had the same amount of money left, how much money did alex have in the begging?
February 24, 2011

Physics-Could someone please help me?
Could someone provide me with a simple explanation of how the Doppler Effect is used to determine the speed and direction of moving object
February 23, 2011

Chemistry
How many kJ will be released as 575 g of steam at 176 degrees celsius are changed into ice at -75 degrees celsius?
February 22, 2011

Chemistry
How many kilojoules of heat energy are needed to change 49.6 g of ice at 15 degrees celsius to water at 58 degrees celsius? I am having trouble figuring out how to solve this.
February 22, 2011

Physics-Please help
Could someone provide me with a simple explanation of how the Doppler Effect is used to determine the speed and direction of moving object
February 22, 2011

Math
When I do 12 times 9.5 do I do 12 x 9.5 OR 12 x9.5 but I am pretty sure it is the first one. Thank you so much!
February 21, 2011

Math
4th word is HOW not hw
February 21, 2011

Math
To find out hw much inches are in 9.5 feet, do I do 12 times 9.5? I would do that because there is 12 in. in a foot.
February 21, 2011

physics
Roxanne is making a strawberry milkshake in her blender. A tiny .0050-kg strawberry is rapidly spun aroundhe inside of the container with a speed of 14.0 m/s, held by a force of 10.0N. What is the radius of the blender at this location?
February 20, 2011

Physics
Nevermind. I got something close to what I think I'm supposed to get (I calculated 3.71 s). The only thing is, when I plug my time back into the equation to check for correctness, I end up getting a negative 78.4 m, which obviously doesn't equal positive 78.4 m. Any ...
February 13, 2011

Physics
A brick is thrown vertically upward with an initial speed of 3.00 m/s from the roof of a building. If the building is 78.4 m tall, how much time passes before the brick lands on the ground? I think I may have gotten part of this question by first calculating how long it takes ...
February 13, 2011

math
what does squared and cubed mean?
February 9, 2011

Question
Does it have to be about math?
February 9, 2011

Social Studies
Is it in your book?
February 9, 2011

math
what is 6*10^9=
February 7, 2011

math
what is 3*10^6=
February 7, 2011

math
In bengal, india and Bangladashthere are about 2.6*10 to the power of 8. What is 2.6*10 to the power of 8 ?
February 7, 2011

math
u/5=1.9 what is u
February 7, 2011

statistics
Three percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that of two items sold during a given hour by this company both will be returned for a refund
February 7, 2011

Question
Thankyou
February 7, 2011

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