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November 25, 2014

Search: Acetic acid is the active ingredient in vinegar. In a solution of acetic acid the following equilibrium is established: HC2H3O2

Number of results: 58,257

AP Chemistry
Like all equilibrium constants, Kw varies somewhat with temperature. Given that Kw is 7.51×10−13 at some temperature, compute the pH of a neutral aqueous solution at that temperature.
January 24, 2014 by Gabriella

chemistry
Nitric Acid + Calcium hydroxide ---> calcium nitrate + water I wrote it as : NO3 + Ca(OH)2 ---> Ca(NO3)2 + H20 Did I write it correctly? Where should I put my charges? I also have big time trouble balancing this one.
February 4, 2009 by Chopsticks

chemistry
If maleic acid could be represented as H2Ma, write the 2 net ionic equations for its reaction with NaOH in the space below (showing the sequential neutralization of each acidic proton): 1)H2Ma +NaOH---->NaMa+H3O 2) What's the second one?
February 26, 2009 by Anonymous

Chemistry
When hot and concentrated, sulfuric acid is a fairly strong oxidizing agent. Write a balanced net ionic equation for the oxidation of metallic copper to Cu(II) ion by hot concentrated H2SO4, in which the sulfur is reduced to SO2.
June 30, 2011 by Jen

chemistry
A new antibiotic drug has been developed for human oral administration. TECHNICAL DATA FOR ANTIBIOTIC AS FOLLOWS; pKa = 2.1; pH = 2.0 (stomach); pH = 6 (intestines) Will the drug dissociate in aqueous solutions as a weak or strong acid? Explain
March 19, 2012 by ryan

chemistry
To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...
April 16, 2013 by Jamie

chemistry
To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...
April 16, 2013 by Jamie

chemistry
To maintain the effectiveness of a buffer, relative concentrations of the acid and the conjugate base should not differ by a factor of 10. Based on this information, derive pH range within which the buffer can work effectively. I know that I have to use the HH equation, but I ...
April 16, 2013 by Jamie

chemistry
A 30 mL sample of .165 M propanoic acid is titrated with .300M KOH. Calculate the pH at each volume of added base: 0 mL, 5 mL, 10, equivalence point, one-half equivalence point, 20 mL, 25 mL. Use calculations to make a sketch of the titration curve.
October 23, 2013 by Anonymous

economics
Fill in the blanks below with ↑ to indicate an increase in the variable or with ↓ to indicate a decrease in the variable. Answer the questions with a brief written response. A) Consumption > Production ⇒ Economy is Out of Equilibrium ⇒ Inventories __...
February 2, 2011 by Lindsey

English/Writing
Which one of the following sentences is written in the active voice? 1 - Accidents are witnessed every day. 2 - However, few people think seriously of doing something about them. 3 - Accidents are considered by most people as unavoidable. 4 - But it is said that definite steps...
February 19, 2008 by Sarah

Biology
You wish to produce a human enzyme, protein A, by introducing its gene into bacteria. The genetically engineered bacteria make large amounts of protein A, but it is in the form of an insoluble aggregate with no enzymatic activity. Which of the following procedures might help ...
October 10, 2013 by Amanda

Science
Why do lakes lying in granite basins tend to become acidified by acid rain more readily than lakes lying in limestone basins?
March 11, 2008 by Nancy

Mass-mass
How many grams of hydrogen gas are produced when 50.0 grams of zinc react with phosphoric acid, H3PO4 ? Equation:3 Zn +2 H3PO4--->3 H2+ Zn3(PO4)2
March 30, 2009 by robb

Chemistry
A 100.0 mL sample of 0.100 M formic acid, CHOOH, is titrated with 0.200 M KOH. Calculate the pH after 40.0 mL of 0.200 M KOH has been added.
December 7, 2009 by John

Net Ion Equation
How can you write a net ion equation and identify the conjugate acid/base pairs for these followings? KNO3 Na2HPO4 NH4Br
April 14, 2011 by Nicole

biology
If the side chain of a glutamic acid residue has a pKa of 4.1, at pH 6.1 the ratio of uncharged to charged side chain would be about A. 100:1 B. 10:1 C. 1:1 D. 1:10 E. 1:100
January 16, 2013 by Dan

Chemistry
True or False? a) wet metallic copper can be rinsed with acetone to help any remaining cation to metal reduction occur b)copper metal is readily oxidized by nitric acid to yield copper(II) nitrate
October 18, 2008 by Anonymous

science year 7
when zinc is dropped into hydrochloric acid whaich gas is formed? is it zinc chloride? how would you test for the gas and what would happen?
May 5, 2008 by lolly

Chemistry
Modified Arrhenius theory question? using the modified Arrhenius theory, write a chemical reaction equation to explain the acidity of glycolic acid.
November 11, 2009 by Sam

Chemistry
The three common chromium oxides are CrO, Cr2O3, and CrO3. If Cr2O3 is amphoteric, what can you say about the acid-base properties of CrO and CrO3?
March 10, 2011 by vichka

chemistry
Ammonium sulfate can be made by the reaction H2SO4 + 2 NH3 ® (NH4)2SO4. What quantity of ammonium sulfate will result from the reaction of 5.00 kg of ammonia and 20.0 kg of sulfuric acid?
March 26, 2011 by Anonymous

AP CHEMISTRY
Phenolphthalein would not be an appropriate indicator to use to determine the Ka1 of phosphoric acid Why not? what indicator would be appropriate? I Think its 8-11 as it is a small range but i'don't know if its right.
February 15, 2012 by ERAGON

Biology - Help!!
Can someone check these for me? 1. Excretion is the process of (1 point) exchanging carbon dioxide for oxygen. removing metabolic wastes from the body.*** pumping blood throughout the body to supply nutrients and oxygen to cells. breaking food down into nutrients that can be ...
May 20, 2014 by Sandy East Ward

Chem
high purtity benzoic acid (C6H5COOH; ^Hrxn for combustion is -3227kJ/mol) is used as a standard for calibrating bomb calorimeters. A 1.221g sample burns in a calorimeter(heat capacity=1365J/C) that contains exactly 1.270kg of H2O. What temperature change was observed?
October 12, 2008 by Kelsie

chemistry 1 help please!
Write a chemical equation that shows how acid rain H2SO3 was produced from SO2 gas and water in a zip sealed bag? My chem. teacher never explained how to do this and I have several other questions on this type of subject. If you could help me out it would help me tremendously...
April 9, 2013 by Jess

Chemistry
A 10g sample of aniline hyrdochloride is dissolved in 250 mL of solution. C6H5NH2-HCl(s) => C6H5NH3+ (aq)+ Cl-(aq) H2O is shown over the arrow. What is the pH of the solution? You have added a salt to water. The pH will be determined by the (H^+) of the solution from the ...
April 30, 2007 by Brittany

chemistry
Potassium permanganate reacts with sulfuric acid as per the equation shown below. Indicate the excess reactant after the reaction of 7.60 g KMnO4 and 10.32 g H2SO4. 4 KMnO4 (aq) + 6H2SO4 (aq) + 2K2SO4 (aq) + 4MnSO4 (aq)+ 6H2) (l) + 5O2 (g) I have no idea where to start or what...
September 19, 2009 by Some kid

organic chemistry
compare and contrast the reactivity of the organometallic reagents R2Cd, RLi, R2CuLi, RMgBr, RZnBr with respect to ethyl chloride, ethanoic acid and 2-cyclohexen-1-one im not really sure what its asking and i dont know how they react differently determines their reactivity ...
November 2, 2009 by Lucy

Analytical Chemistry
How many milliliters of 0.202 M KOH should be added to 500.0 mL of 0.0233 M tartaric acid (C4H6O6; FW 150.087) to adjust the pH to 2.75? Ka1 = 1.0 x 10-13 and Ka2 = 4.6 x10-5. For this one, the Ka1 seems sort of off. The pka would be 13 which doesn't make sense.
March 4, 2013 by Micki

chemistry
Q.1 What will be the pH at the equivalence point during the titration of a 100 ml 0.2M solution of CH3COONa with 0.2M of solution of HCl?(Ka = 2*10^-5) Q.2 Aniline behaves as a weak base.When 0.1M,50ml solution of aniline was mixed with 0.1M,25ml solution of HCl the pH of ...
March 27, 2010 by gaurav

Algebra 1
23.what is the slope of a line parallel to a line represented by the equation x=2y-3? 19.what is the solution to the following system of equation? Y=4x-8 Y=2x 16.which graph below shows the function f(x)=-3x-1? 12.what is the solution to the following system of equations? Y=2x...
January 21, 2012 by Elyon

Chemistry
In the reaction between aluminum and hydrochloric acid, how many moles of hydrogen gas would be liberated when 3.612E-2 grams of aluminum are treated with excess hydrochloric acid? Moles of hydrogen gas liberated = mol The atmospheric pressure was measured to be 0.9666 atm and...
November 4, 2011 by Carrie

Chemistry
In the reaction between aluminum and hydrochloric acid, how many moles of hydrogen gas would be liberated when 3.612E-2 grams of aluminum are treated with excess hydrochloric acid? Moles of hydrogen gas liberated = mol The atmospheric pressure was measured to be 0.9666 atm and...
November 5, 2011 by Carrie

Chemistry
Why is it when you add bromine to trans-cinnamic acid, it is more slow than the addition of BR2 to a regular alkene? You might want to look at the mechanism of bromine addition to an alkene.
July 26, 2007 by Linda

chemistry
aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be formed if 250g H2SO4 reacted with aluminum?
January 31, 2008 by max

chemistry
23. aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be formed if 250g H2SO4 reacted with aluminum?
May 30, 2008 by Anonymous

chem
i am trying to find the minimum volume of hot water needed to dissolve 100 mg of salicylic acid. when i did the calculations i got 100 ml of hot water is this correct??
September 30, 2008 by tom

biochem
When making Aspirin, I know that sulfuric acid is used as a catalyst. But i was wondering 1.) if the reaction would happen without the cataylst and 2.) can other substances be used as a cataylst in this reaction?
January 24, 2010 by chrissy

chemistry
write a balanced chem equation for solid lead (II) sulfide reacts with aq hydrochloric acid to form solid lead (II) chloride and dihydrogen sulfide gas.
March 28, 2010 by jen

Instrumental
A complex was formed between Ni (II) and 1-cyclopentene-1-dithiocarboxylic acid (CDA). The measurements were made at 530 nm in 1.00-cm cell. Find the formula of the complex. C(CDA)=1.00x10^-3 C(Ni)-1.00x10^-3
March 10, 2011 by Anonymous

chemistry
when we are synthesis n-butyl bromide what impurities we can expect in the crude product?and how would these impurities react with concentrated sulfuric acid?and also how we can make t-butyl bromide?
March 13, 2011 by sashika

chemistry
1) a student used 3.50 g of salicylic acid. calculate theoretical yield 2) the actual yield (from experiment) was found to be 1.50 g less than the theoretic yield (mass), calculate the percent yield 3) t
July 18, 2012 by ama

chemistry
when sulfuric acid is added to solid sodium chloride and the mixture is heated, hydrogen chloride gas is generated, leaving a solid residue of sodium sulfate
September 27, 2013 by meresa

chemistry
when sulfuric acid is added to solid sodium chloride and the mixture is heated, hydrogen chloride gas is generated, leaving a solid residue of sodium sulfate
September 27, 2013 by meresa

health
Which of the following is a risk factor for developing cancer? Drinking too much alcohol Smoking Promiscuity Earlier sexually active behavior all of the above I think that it's smoking or all of the above. I'm not sure on if sex can cause cancer
November 19, 2008 by Stacey

Chemistry
Estimate the value of the equilibrium constant at 550 K for each of the following reactions. 1) 2CO(g) + O2(g) <==> 2CO2(g) 2) 2H2S(g) <==> 2H2(g) + S2(g) Thanks in advance!
July 18, 2010 by Miguel

physics
Two blocks of masses m and 2m are held in equilibrium on a frictionless incline as in the figure. In terms of m and θ, find the following.
September 28, 2013 by kay

152
Ka for hypochlorous acid,HCLO, IS 3.0*10^-8. Calculate the pH after 10.0,20.0,30.0, and 40.0mL OF 0.100M NaOH have been added to 40.0mL of 0.100M HCLO..
March 31, 2010 by AMI

chemistry
The pH of a solution is 6.0. Explain how the addition of the following substance would alter (or not alter) the pH of the solution. a. HCl b. NaOH c. H20
January 24, 2011 by steven

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 by Julia

calculus
solve the following exponential equation. 8^x=3 what is the exact answer? a. x= ? b. there is no solution what is the answer approximated to 3 decimal places? a. x= ? b. there is no solution
January 1, 2013 by Kyrstal

Chemistry
Calculate the concentration of ions in the following saturated solutions. (a) [I −] in AgI solution with [Ag+] = 8.1 10-9 M (b) [Al3+] in Al(OH)3 solution with [OH −] = 1.8 10-9 M
March 17, 2013 by Anonymous

Chemistry
Na2SO4 solution is slowly added to a solution which contains .10 M Ba (2+) and .1 M Pb(2+). which of the following statements descrives the result of the addition of Na2SO4
April 1, 2013 by Joe

SEATTLE
Determine the volume of base ml needed to prepare the following 500 ml of 0.18 % NaOH SOLUTION USING A 10.0 % NaOH SOLUTION
March 21, 2014 by MH

Biology
Ok, equilibrium is the notion of non-change in population gene pools right? But how does gene flow upset this equilibrium?
April 10, 2008 by Sam L.

equilibrium constant
WHat is the accepted equilibrium constant for ferric thiocyanate [FeSCN2+]? I can't find a reliable number anywhere. Thanks in advance.
June 30, 2010 by CHeem

chemistry
How many moles of water will produced at equilibrium be if there is 1.0 mole of carbon dioxide formed at equilibrium? 2 C2 H6(g) + 7 O2(g) <==> 4 CO2(g) + 6 H2 O(g) ... [CO2]^4[H20]^6/[C2 H6]^2[O2]^7
July 27, 2010 by Anonymous

chemistry
equilibrium pressure at 731 K for the reaction H2+I2-2HI initially the mixture contains 0.08592 each of H2 and I2 and 1.0atm.what is the pressure of HI at equilibrium?
July 10, 2012 by christine

reading
Which of the following is an example of active reading? A. Skimming over information and taking notes. B. Reviewing a chapter, question as you read, and review notes. C. Speed reading and taking notes in your own words. D. Both B & C.
February 28, 2013 by victor

ENVIRONMENTAL CHEMISTRY
Which one of the following statements is incorrect? Why? A. “Oxygen (O2) is a strong oxidant (oxidizing agent).” B. “Oxygen (O2) is an active oxidant (oxidizing agent).”
February 18, 2010 by CHEMISTRY

Economics are these correct
Are these correct? Thanks, Answer is next to number of question C 1. Which of the following is consistent with the law of supply? a. As the price of calculators rises, the supply of calculators increases, ceteris paribus. b. As the price of calculators falls, the supply of ...
July 4, 2009 by Trying

Government
Write a 1,000-word report on two different ways that you, as a young citizen, can become active in politics that would help promote causes that you believe in. You may choose a specific organization that is politically active. In the report, tell the goals of that organization...
October 15, 2012 by Rachel

Government
write a 1,000-word report on two different ways that you, as a young citizen, can become active in politics that would help promote causes that you believe in. You may choose a specific organization that is politically active. In the report, tell the goals of that organization...
January 7, 2013 by Mikaela

math
A linear system may have a unique solution, no solution, or infinitely many solutions. Indicate the type of the system for th following examples by U , N , or I 7x+3y= pi 4x-6y= pi^2 2x+3y= 0 4x+6y= 0 2x+3y=1 4x+ 6y= 1 x+y=5 x+2y=10 2x-3y=5 4x-6y=10
September 10, 2009 by Completely lost?!

Algebra 1a
Solve the following system of equations. x+3y=6 x=8-3y What is the solution of the system? Type the ordered pair or indicate if there is no solution. Thank you very much
May 26, 2010 by Nikki

Chemistry
c) How many grams of each matter is in 2,0 litres of the following water solutions i) 8,6 til-% ethanol solution ii) 22,6 til-% glycol solution (1,2-ethanediol)
October 5, 2014 by Luiz

chem
When the concentration of I2 is increased to 1.5 M, the ratio of products to reactants is 28. The equilibrium constant for the reaction is 83. In which direction will the reaction shift to regain equilibrium?
November 19, 2012 by tracy

Math 116 algebra please check
Solve the following system of equations x + 6y =4(1) x = 9-6y (2) What is the solution of the system N There is no solution
July 16, 2008 by jay jay

Math
The following equation has a positive and a negative solution. z-1/z+1 = 2/z+4 I need to find the positive solution, any ideas please?
August 14, 2010 by Del

Math/Econ
If the demand curve is P=12.4-4Qd and the supply curve is P=-2.6+2Qs, What is the equilibrium price? What is the equilibrium quantity?
September 6, 2007 by Rachel

science
Estimate the pH of water in equilibrium with CO2 with a concentration of .008867M. Use equilibrium concepts to estimate? Is Kc equilivate to the pH?
September 2, 2010 by Eileen

chemistry
equilibrium CO(g)+2H2(g)<->CH3OH(g)calculate these concentrations:CO(g) in an equilibrium mixture containing 0.933mol/L H2 and 1.32 mol?l CH3OH.
July 18, 2011 by rocky

chemistry
At 2273 K the equilibrium constant for the reaction 2 NO(g) « N2(g) + O2(g) KC = 2400 What would be the equilibrium concentration of N2 if the initial concentration of NO was 0.1778 M?
May 6, 2014 by Andy

chemistry
A 0.140-mole quantity of CoCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Co2+ ions at equilibrium? Assume the formation constant of Co(NH3)6^2+ is 5.0e31. Please help, I don't know how to do this problem.
May 6, 2012 by Anonymous

Chemistry (equilibrium)
In the following equilibrium system, N2O4(g) <--> NO2(g), what happens to the color of the gas if the forward reaction speeds up? What happens if the reverse reaction speeds up? What happens if the forward and reverse reaction happen at the same time? NO2 is a reddish-...
April 1, 2007 by abby

Chemistry
A solution of hydrogen peroxide, H2O2 , is titrated with potassium permanganate, KMnO4 , according to the following equation: 5 H2O2 + 2 KMnO4+ 3H2SO4 -> 5O2 + 2 MnSO4 +8H2O + K2SO4 It requires 46.9mL of 0.145 mol/L KMnO4 to titrate 50.0 mL of the solution of H2O2 . What is...
March 30, 2008 by Brenan

Chemistry
What is meant by the hyrdration of the hydrogen ion? Does this mean you add water? Does this mean you create hydronium ions? Are hydronium ions only created when you hydrate a concentrated acid?
March 22, 2009 by Michelle

chemistry
aluminum reacts with sulfric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be form if 250 g H2SO4 completely reacted with aluminum?
November 30, 2009 by S

chemisty
Sulfuric acid reacts with hydrogen iodide to produce sulfur dioxide, iodine and water. a) write total ionic equation b)write net ionic equation
April 22, 2010 by help!

chemistry
Sulfuric acid reacts with hydrogen iodide to produce sulfur dioxide, iodine and water. a) write total ionic equation b)write net ionic equation
April 23, 2010 by help please!

Chemistry
Water will react most completely as an acid with A. SO3^-2 B. H2BO3- C. C6H5O- D. CH3COO- Why isn't the answer A, since H2O + SO3^-2 <-> HSO3- + OH- so H2O and HSO3- are the conjugate acids.
May 4, 2010 by sh

chemistry
what are the errors in the double-indicator titration of (sodium carbonate and sodium hydrogen carbonate) against hydrochloric acid, using Phenolphthalein and Methyl orange as indicator? how can I improve the it?
October 9, 2010 by kay

chemistry
what are the errors in the double-indicator titration of (sodium carbonate and sodium hydrogen carbonate) against hydrochloric acid, using Phenolphthalein and Methyl orange as indicator? how can I improve the it?
October 13, 2010 by kay

Chemistry
Hydrochloric acid reacts with Magnesium to form Magnesium Chloride and Hydrogen gas. deltaH= -442kJ If 15mL of 1.0M HCl reacts with .3g of Mg, how many L of H2 are produced? How much heat is produced?
December 8, 2010 by Taylor

chemistry
oleum or fuming sulfuric acid available commercially in concentration rnaging from 20 to 99.9% sulfur trioxide. What is the percnet by mass of sulfur trioxide if oleum is expressed as 3H2SO4 5SO3?
April 20, 2011 by Anonymous

Chemistry
Doing some practice problems, these are a couple of my answers. Are these written correctly? Write the conjugate acid: a)HPO4(2-) Answer: HPO4(2-) + H(+) --> H2PO4(-) b)NO2(-) Answer: NO2(-)+ H(+) --> HNO2
October 17, 2011 by Kevin

Superglue fuming--fingerprints
What is an amino acid? Why do they cause superglue to stick to my fingerprints on a cd when I place the cd in a plastic box covered with plastic wrap? I'm 9, so I really need just a simple answer. Thanks.
November 7, 2011 by Matthew

Organic Chemistry
Melting Point Determinations between urea and trans-cinnamic acid. Q. If urea were a significant base, specifically how would your Melting Point Diagram be different?
September 23, 2012 by Zach

Chemistry I NEED HELP! PLEASE
How many moles of Hydrochloric acid are needed to dissolve 39.0 grams of aluminum Hydroxide? I just need to write out the equation but I was out and don't know hwo PLEASE HELP!
January 17, 2013 by Lost

chemistry
80ml of hcl is added to 2.5gm of pure cac03 when the reaction is over, then 0.5gm cac03 is left. Find the normality of the acid The answer 0.5N Who helps step by step
February 3, 2013 by Fai

chemistry
n an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot. What type of reaction has occurred?
October 21, 2013 by brittany

Chemistry
aluminum reacts with sulfuric acid to produce aluminum sulfate and hydrogen gas. how many grams of aluminum sulfate would be formed if 250 g H2SO4 completly reacted with aluminum
February 23, 2014 by Marcus

chemistry
In an experiment, Ann mixes concentrated sulfuric acid with water in a reaction test tube. The walls of the test tube turn hot. What type of reaction has occurred?
June 18, 2014 by josie

Chemistry 30
Consider the following reaction at equilibrium: 4NH3(g) + 5O2(g) ↔ 4NO(g) + 6H2O(g) In what direction will the following changes force the reaction? a) Addition of O2 b) Reduction of the amount of water vapour c) Increase in the pressure d) Decrease in the volume e) If ...
September 30, 2014 by Ade

chemistry
The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> and <-- FeSCN2+(aq) A. A heterogeneous equilibrium exists because of the charged ions. B. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. C. The ...
April 9, 2008 by Lindsey

chemistry
The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> FeSCN2+(aq) A. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. B. The equilibrium constant is Kc = [Fe3+][SCN–][FeSCN2+] C. A heterogeneous equilibrium ...
April 10, 2008 by Jerome

ap chem
Like all equilibrium constants, Kw varies somewhat with temperature. Given that Kw is 5.02×10−13 at some temperature, compute the pH of a neutral aqueous solution at that temperature. 006
February 14, 2011 by Anonymous

chem
A solution initially contains 0.350 mol/L of A and 0.750 mol/L of B. A reaction occurs according to the equation 2 A(aq)+B(aq)<=> 3 C(aq)+D(s) At equilibrium, [C] is found to be 0.100 mol/L. What is the value of Keq?
January 26, 2012 by ami

Osciallations
A partridge of mass 5.01kg is suspended from a pear tree by an ideal spring of negligible mass. When the partridge is pulled down 0.100 m below its equilibrium position and released, it vibrates with a period of 4.20s . What is its speed as it passes through the equilibrium ...
April 15, 2010 by Mikhail

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