Friday

October 24, 2014

October 24, 2014

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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