Monday
October 20, 2014

Posts by molly


Total # Posts: 500

college physics
A mass of 1 kg is hanging from a spring with a spring constant of 3 N/m. At a distance of 0.2 m below the equilibrium it has a velocity of 1 m/s in the upward direction. What is the amplitude of the oscillation?
November 21, 2010

College Chemistry
Calculate the vapor pressure of a solution of 0.39 mol of cholesterol in 5.4 mol of toluene at 32oC. Pure toluene has a vapor pressure of 41 torr at 32oC.
November 19, 2010

College Chemistry
How much ice can be melted at 0oC by the condensation of 1.0 kg of steam at 100.oC? (ΔHfus of ice = 6.01 kJ/mol; ΔHvap of water = 40.7 kJ/mol)
November 19, 2010

Math
Four balls are simultaneously picked at random from a jar containing 2 red balls, 2 green balls, and 6 yellow balls. What is the probability that exactly two of the selected balls will be red?
November 15, 2010

math
To find the amount of the discount, you multiply the price by the percentage out of 100. So, 35x.25=8.75 This is the same as (X/35) x (25/100) So you are getting 8.75 off. And the price you pay is.. 35-8.75 = $26.25
November 15, 2010

chemistry
What reagent would allow you to distinguish between FeCl3 and PbCl2? (As if using an analysis scheme)
November 15, 2010

Chemistry
What reagent would allow you to distinguish between BaS and NiSO4? (As if using an analysis scheme)
November 15, 2010

Chemistry
What reagent would allow you to distinguish between AgNO3 and MNSO4? (As if using an analysis scheme)
November 15, 2010

Chemistry
What reagent would allow you to distinguish between AgNO3 and MNSO4? (As if using an analysis scheme)
November 15, 2010

CHEM
What reactions does Br- have, ones that would distinguish it as a anion? As in a anion analysis scheme?
November 15, 2010

Chem
Why is BaSO4 insoluble in HNO3?
November 15, 2010

6th grade
What is the volume of a chest that is 20 inches by 10 inches by seven and one tenth inches?
November 8, 2010

Physics Help!!!
With the energy needed to warm up some amount of water from 26°C to 44°C, how high could you lift it?
November 8, 2010

Physics Help!!! solids and fluids
During a transatlantic flight, you drink a bottle of water and tightly close its lid again. Back on the ground during taxiing to the terminal, you notice that the thin plastic bottle is crushed, and you eyeball it to be only about 80 percent of its original volume (the photo ...
November 8, 2010

Chemistry
How can you determine which of any two halogens is more active?
November 7, 2010

Spanish 1
B and C
November 7, 2010

Physics HELP!!! potential energy
Two identical metal plates with small holes are aligned a distance L=6.7 cm apart. They have a potential difference of 131 Volts. An electron can enter through the hole in the negative plate and exit through the hole in the positive plate. If it enters with a velocity of 3290 ...
November 3, 2010

Physics HELP!!! Potentials and Fields
Two identical metal plates with small holes are aligned a distance L=6.7 cm apart. They have a potential difference of 131 Volts. An electron can enter through the hole in the negative plate and exit through the hole in the positive plate. If it enters with a velocity of 3290 ...
November 1, 2010

Physics HELP!!!
A car (mass 920 kg) drives up a hill (height 328 m) in 143 seconds. At the bottom of the hill, it has a speed of 24 m/s, but at the top, it has slowed down to 14 m/s. Neglecting friction, what is the average engine power
October 31, 2010

Physics HELP!!!
A car (mass 920 kg) drives up a hill (height 328 m) in 143 seconds. At the bottom of the hill, it has a speed of 24 m/s, but at the top, it has slowed down to 14 m/s. Neglecting friction, what is the average engine power
October 31, 2010

Physics
So would it be 1/2*2.6^2/30
October 29, 2010

Physics
A flywheel has a moment of inertia of 2.6 kg·m2. What is the average power needed to spin it up from rest to an angular velocity of 100 rad/s in 30 seconds?
October 29, 2010

physics:energy
Okay I got it thanks for the help.
October 27, 2010

physics:energy
watts wouldn't be the units correct. My answer is 1456.785
October 27, 2010

physics:energy
How much power is needed to push a box (mass 27 kg) over a surface (coefficient of friction μk=0.5) with a velocity of 1.1 m/s?
October 27, 2010

Physics: energy
Thank you
October 27, 2010

Chemistry
How is the solubility of a solid affected by temperature?
October 26, 2010

math
Let C(q) represent the cost, R(q) the revenue, and π(q) the total profit, in dollars, of producing q items. a) If C′(67) = 65 and R′(67) = 86, approximately how much profit is earned by item number 68? b) If C′(149) = 120 and R′(149) = 98, ...
October 8, 2010

physics
thanks, i got them all except for the first one.
October 4, 2010

physics
true or false If a net force acts on an object, the object's speed will change. An object's velocity will change if a net force acts on the object. If two object have the same acceleration, they are under the influence of equal forces. The net force which acts on an ...
October 4, 2010

English I
What is feild or Scope? I am writing a book report on Lord of the Fies by William Golding.
September 28, 2010

5th grade math
16-(3x2)x2 16-(6) x2 16-(12) 4 4is the answer and in middle school when u have parensis u dont need to put an x before the nest multipliction number it means times already
September 28, 2010

8th grade
$1 for every 4 oz 12/4
September 26, 2010

3rd grade
they don't really learn algebra they just have a box where a middle or high school student would have a variable
September 22, 2010

Physical Science
thank you
September 21, 2010

Physical Science
If you did it wasn't for me :)
September 21, 2010

Physical Science
Need help please. the once with the ( ) is my answer but i am not sure if it right. Thanks for your help. 15. If the distance from a converging lens to the object is less than the focal length of the lens, the image will be A. real, inverted, and larger than the object. (B). ...
September 21, 2010

4th grade
My mom says that the glaciers are melting because of global warming.
September 14, 2010

math
1+j=2(2j+1)
September 8, 2010

English
Thank you very much.
July 1, 2010

English
Obviously, the police will use force if you do not cooperate. Is this grammatically correct? I need to write a sentence to show how a comma should be used after introductory words or groups of words.
July 1, 2010

math
The annual Salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience. Round to the nearest $100. x y 2 ...
June 19, 2010

math
A test is composed of six multiple choice questions where each question has 4 choices. If the answer choices for each question are equally likely, find the probability of answering 3 OR 4 questions correctly. 0.131836 0.032959 0.004639 0.164795
June 19, 2010

algebra
Solve: 4 sqrt (x) = 8 + 2 sqrt (x) a) (-4) b) (16) c) none d) (4) c
June 18, 2010

math
simplify cot(-theta)tan(theta)
June 7, 2010

Math
FiberType HighCalorie LowCalori Totals High Fiber 18 4 22 Medium Fiber 23 6 29 Low Fiber 12 21 33 Totals 53 31 84 3. What is the probability that a cereal would both high calorie and high fiber? In other words, what is P(high calorie and high fiber)? 4. What is the probability...
May 25, 2010

statistics
Use this table to answer the questions. Height (in inches) Frequency 50-52 5 53-55 8 56-58 12 59-61 13 62-64 11 1. Identify the class width. 2. Identify the midpoint of the first class. 3. Identify the class boundaries of the first class. 4. Give the relative frequency for ...
May 19, 2010

algebra
I think this is somewhat how you do it. FOIL: (X+4)(X-4) =x^2-4x+4x-16 that simplified is = x^2-16 etc. but idk if i am remotely close
May 17, 2010

Drug Abuse
Well the moods they get it can effect people around them It can lead to stealing money to buy more drugs and that can hurt the family because then they will lie to cover it up.
May 16, 2010

Chemistry
What is the equilibrium constant for the reaction: HCOOH(aq)+ OH (aq) <--> HCOO(aq)+ H2O(l) Ka= 1.7 * 10^-4 Kb for the conjugate base= 4.9 * 10^-11 Thank you!
May 10, 2010

algebra
what is the solution of the following system of equations? 2y + 3x = 8 y = 1/2x a)(2,3) b)(1,2) c)(3,2) d)(2,1) what is the solution if the following system of equations? y = 2x + 10 3y = -4x a)(-3,4) b)(4,-3) c)(5,1) d)(1,5) Thanks you
April 28, 2010

math
what is the solution of the following system of equations? y = -2/3x y = 1 a) (-2,3) b) (1,-2/3) c) (-3/2,1) d) (1,-3)
April 28, 2010

Algebra
what is the solution of the following system of equations? 2y - x = 8 y = 2x + 1 a) (5,2) b) ((1,2) c) (2,1) d) (2,5) what is the solution of the following system of equations? y = 0 x = y + 2 a) (2,1) b) (0,2) c) (1,2) d) (2,0) Thanks, molly
April 28, 2010

Chemistry
Assign oxidation numbers to all species in the redox reactions below. Identify the oxidizing and reducing agents. 1. Fe(OH)2 (s) + CrO42- (aq) → Fe2O3(s) + Cr(OH)4-(aq) (basic)
April 27, 2010

biology
yes.they do
April 15, 2010

chemistry check my work
C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield? percent is 77.l1% is this correct?
April 15, 2010

Chemistry
I am still getting the same answer
April 14, 2010

Chemistry
C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield? From my understanding the equation is already balanced, correct? My answer: 26.7%, is this...
April 14, 2010

Chemistry
From my understanding the equation is already balanced, correct? My answer: 26.7%, is this correct? Work: (11.20gCH3OH)(1 mol CH3OH)/32.05gCH3OH=0.3495gCH3OH 0.3495g/1.31g= 26.68%
April 14, 2010

Chemistry
C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield?
April 14, 2010

chemistry
how many moles are in a 65L sample of chlorine gas at 10degrees Celcius?
March 11, 2010

8th grade
what were two goals of american diplomacy in the 1930s?
March 8, 2010

English
What language was Metamorphoses by Ovid written in?
February 20, 2010

entrepreneur/business
What are three things you would do to sell a strategy proposal to your management team.
January 31, 2010

english
indirect object
January 26, 2010

math
how to solve h/2=3/16
January 25, 2010

Science
Why is this statement true? With the range of data available, geologists cannot predict exactly where and when earthquakes will occur.
January 23, 2010

Science
Is this true? If not why? Oceanic crust near the mid-ocean ridge is younger than oceanic crust farther away from the ridge?
January 23, 2010

Spelling
I'm writing about a position as a sanitation advisor. Which way is the correct way is right. Advisor or Adviser I'm so confused
January 1, 2010

science
can you tell me more about Jupiter please.\
December 9, 2009

Math;Pre-Algebra
HELLO ANYONE THERE COULD YOU HELP ME???????????????????????????????????????????????
December 8, 2009

Math;Pre-Algebra
I can't find the other post please would you resend it to Thd Diana one or to this one both of the names are my nicknames
December 8, 2009

Math;Pre-Algebra
I Can't find it
December 8, 2009

Math;Pre-Algebra
My cousin Robert was pushed into a pool. The pool was 6 feet Wide and 10 feet deep. The pool had soft walls. How did my Cousin Robert Emerge from the pool? Ans__________ Hint- We do not know if it's filled with water or not. It is a round pool. It is a ground pool.It has ...
December 8, 2009

French
How do you make 'cheveux' feminine?
November 19, 2009

mad
how can i finish my homework if there is know one to help me! >:(
November 19, 2009

spanish
I am in spanish 1A. my question is what is these sentences translated in english? 1. a alma le gusta correr? 2.david es de miami o de san antonio? 3.el senor estrada esta bien o terrible? 4. le gusta correr a arturo o a francisco? 5. el senor garcia es de san antonio o de ...
November 19, 2009

chemistry please help
how do you know if a hydrolytic work up is required for reactions with grignard reagents? What does hydrolytic work up mean is it treatment with aqueous acid
November 2, 2009

STOICHIMOETRY
HOW MANY MOLES OF O2 CAN BE PRODUCED BY LETTING 12.00 MOLES OF KClO3 REACT?
October 15, 2009

11th grade Physics
Okay but is 42 the answer ?
October 7, 2009

11th grade Physics
Two children playing on the beach are pulling on an inner tube. One exerts a force of 45 N [N]. The other exerts a force of 60 N [SW]. What is the net force acting on the tube?
October 7, 2009

Physics
Two children playing on the beach are pulling on an inner tube. One exerts a force of 45 N [N]. The other exerts a force of 60 N [SW]. What is the net force acting on the tube?
October 7, 2009

URGENT: Grade 8 Math
In my math question it says: Multiply. Simplify before multiplying. Use benchmarks to estimate to check the product is resonable. a)3/4 x 8/5 is one of the equations What are benchmarks?
September 25, 2009

math
Natasha has to determain the number of toothpicks in the 15th step, step one has four toothpicks step two has 12 toothpicks and step three has 24 toothpicks. She does not want to draw 15 pictures then count the toothpicks. Explain or show how she could do this.
September 20, 2009

9th grade geometry
if RS=8y+4, ,,ST=4y+8 and RT=15y-9 find the value of y
September 15, 2009

AP Bio
I have the same question
September 12, 2009

law
the u.s congress passed the safe streets and crime control act in 1968, this legislation was used to fund what federal program
September 10, 2009

HCA 270
Can anyone help me with this please? What types of cost allocation criterion and methods are available to all healthcare organizations
August 28, 2009

Financial Matters
Has anyone been a health care financial officer that can do a interview for me? I just ask some questions and all I need are your answer. But you have to be, or have been a financial health care officer.
August 28, 2009

Financial officer Interview
I was just hoping someone in the health area might have been on before and would have been able to take the time to interview with me. Just trying.
August 28, 2009

Financial officer Interview
No I need to do an interview with a health care financial officer. These are the questions that I am asking you, or the person.
August 28, 2009

Financial officer Interview
1.Briefly describe your current position and its duties and responsibilities. 2.What are the revenue centers for your organization 3.What types of centers (departments) have budgets? 4.How many cost centers are there? Can you give some examples? 5.How important is it to ...
August 28, 2009

English
Can you please proofread this for me. Its just a journal entry that we had to do. Thank you very much!! Ever since I was a little girl I dreamed of growing up to become an elementary school teacher. Sure enough that dream still holds true today. I want to be able to provide ...
June 21, 2009

English
This is the second part. Feedback is appreciated greatly. During my time in the class I was able to put many smiles on people's faces. With the help of my council, we took part in adopting over twenty families for Christmas, prepared/delivered food baskets for the Veterans...
June 18, 2009

English
This is the second part. Please read. Thanks for your feedback. During my time in the class I was able to put many smiles on people's faces. With the help of my council, we took part in adopting over twenty families for Christmas, prepared/delivered food baskets for the ...
June 18, 2009

English
Can you please proofread this for me. Any help would be greatly appreciated. Throughout my life, I have been faced with many great opportunities that have helped me become a better person and reach my goals in life. I graduated from ? High School in 2008 with honors and have ...
June 18, 2009

Child Growth & Development
What is an example of physical aggression that would occur in middle childhood? I already looked up the definition and understand what it means. I need an example of this type of aggression. Thank you
April 9, 2009

Social Studies
Hairstyles Early 1960's Middle 1960's Late 1960's Popular Accessories Popular places that people got their clothes from Bathing Suits Dresses Tops Pants Skirts Shoes Hippies in the 1960's
April 9, 2009

algebra
When trying to solve an equation and you end up with the exact same number on both sides , like 10=10 then the equation has infinitely many solutions. If you end up with 2 different number on both side of the equation, like 3=5 then the equation has no solution. If there is a ...
April 9, 2009

biology
It's obtained directly from ATP adenosine triphosphate
April 9, 2009

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