# A 50/50 blend of engine coolant and water (by volume) is usually used in an automobile\'s engine cooling system. If your car\'s cooling system holds 4.00 gallons, what is the boiling point of the solution?

42,936 results, page 31
1. ## PACE INter Science Colldege

what is average rate in cm3/s of gasoline to the engine of a car travelling at 100km/hr if it averages 10km/l?

asked by ayesha on July 29, 2016
2. ## Physis

A car travelling at 30mls overcome a frictional resistance of 100n while moving. What is the power of the engine

asked by Deborah on January 28, 2019
3. ## Science

Why the base of the spark plug of petrol engine is made of ceramics,give scientific reason??

asked by Ena on March 28, 2018
4. ## PHYSICS

A CAR TRAVELLING AT 30M/S Overcome A FrictionAlly Resistance Of 100N While Moving.What Is The Power Of The Engine(Take 1 Hp=3/4 Kw)

asked by PRINCE on January 27, 2016
5. ## Science

A block and tackle consisting of 5 pulleys is used to lift a car engine weighing 850kg. What is the Velocity

asked by Hohenzollern on May 3, 2016
6. ## physics

Please Help!! How much power is developed by a jumbo jet that cruises at 250 m/s. When the trust of its engine is 100,000 N? Thanks!!!

asked by yena on November 24, 2014
7. ## physics

calculate the acceleration of a 2000-kg single air plane just before takeoff when the thrust of its engine is 500 N

asked by tony on February 5, 2013
8. ## Educational technology

Which of the following is a search engine? A. Internet explorer B. Mozilla Firefox C. Google D. Safari Can anyone help me with this? I do not understand what this is supposed to mean!

asked by Jessica on May 11, 2017
9. ## physics

A 1300 sports car accelerates from rest to 95KM/H in 7.0S .What is the average power delivered by the engine?

asked by HELP on December 15, 2010
10. ## Physics

Could a simple machine such as a lever, a pulley system or a hydraulic jack be considered a heat engine?

asked by Sylvia on December 28, 2010
11. ## Physics

How long would it take a fighter jet to accelerate from 0 to 250m/s if the force from the engine was 180000N and the mass was 10000kg ? please help please

asked by Anonymous on December 4, 2011
12. ## College Physics

A 750 kg rocket accelerates straight upward from the ground at 60 m/s2. What is the force (thrust) provided by the engine?

asked by Nicole on February 6, 2015
13. ## physics

An Otto engine has a maximum efficiency of 33.1 %; find the compression ratio. Assume that the gas is diatomic.

asked by jimmy on December 17, 2012
14. ## physics

a car of mass 800kg attains a speed of 25m/s in a second.calculate the power developed in the engine

asked by Rantimi on February 11, 2017
15. ## PHYSICS!!

Squids and octopuses propel themselves by expelling water. They do this by taking the water into a cavity and then suddenly contracting the cavity, forcing the water to shoot out of an opening. A 6.50 daN squid (including the water in the cavity) that is

asked by Jessica on April 11, 2016
16. ## Ela

can you proof read please The first time most Canadians really started to think about the safety of its water supply was in 2000, when seven people in walkerton ,Ontario , died from drinking tainted tap water. Thousands more was taken ill. All of a sudden,

asked by anu on January 3, 2010
17. ## physics

a cylinder with movable piston contains 40 moles of an ideal gas it is placed in an ice water bath where it reach thermal equilibrium. it is then compressed slowly with 7500 j of work done to compress it to a smaller volume. how much does its internal

18. ## Chemistry

Dissolved 0.7500 g calcium chloride dihydrate and impure, in distilled water and the volume was elevated to 200.00 mL in a volumetric flask. A rate of 10.00 mL of the same consumed the titration 18.9 mL 0.0125 M EDTA using CALCON as indicator. What is the

asked by Damon on August 26, 2016
19. ## Chemistry

Dissolved 0.7500 g calcium chloride dihydrate and impure, in distilled water and the volume was elevated to 200.00 mL in a volumetric flask. A rate of 10.00 mL of the same consumed the titration 18.9 mL 0.0125 M EDTA using CALCON as indicator. What is the

asked by Damon on August 28, 2016
20. ## Chemistry

Dissolved 0.7500 g calcium chloride dihydrate and impure, in distilled water and the volume was elevated to 200.00 mL in a volumetric flask. A rate of 10.00 mL of the same consumed the titration 18.9 mL 0.0125 M EDTA using CALCON as indicator. What is the

asked by anon on August 26, 2016
21. ## Chemistry

How would I graph this: (I don't understand the whole with [1/volume] (units=1/mL) on the X-axis ) According to Boyle's Law, pressure is inversely proportional to volume, so prepare a graph of the data, with [1/volume] (units=1/mL) on the X-axis and

asked by Ally on April 17, 2014
22. ## american intercontinental university

* Prepare one cup with sugar water and one with fresh water. * Take a sip of the sugar water and swish it around in your mouth for several seconds without swallowing it. Gradually, it should taste less sweet. (Dispose of the sugar water) * Taste from the

asked by ingrid on March 30, 2010
23. ## psychology

* Prepare one cup with sugar water and one with fresh water. * Take a sip of the sugar water and swish it around in your mouth for several seconds without swallowing it. Gradually, it should taste less sweet. (Dispose of the sugar water) * Taste from the

asked by ingrid on March 30, 2010
24. ## Chemistry

A 0.1052 g sample of copper metal is dissolved in 55 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.5 mL. (Calculate the molarity of Cu2+.)

asked by Ashley on June 21, 2013
25. ## Chemistry

A 0.1052 g sample of copper metal is dissolved in 55 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 208.5 mL. (Calculate the molarity of Cu2+.)

asked by Ashley on June 21, 2013
26. ## Math (can you provide me with the working and ans?

A rectangular tank 28cm long and 18cm wide was filled with water to a dept of 7cm. When 12 marbles were added the level rose to 12cm. Find the average volume of the 12 marbles.

asked by Mark on January 28, 2016
27. ## Chem

A 0.1098 g sample of copper metal is dissolved in 34 mL of concentrated HNO3 to form Cu2+ ions and then water is added to make a total volume of 209.5 mL. (Calculate the molarity of Cu2+.)

asked by ALMA on November 2, 2011

a rectangular tank 28cm long and 18cm wide was filled with water to a dept of 7cm. When 12 marbles were added the level rose to 12cm. Find the average volume of the 12 marbles.

asked by Cyrus on January 26, 2016
29. ## physics

solid gold statue with mass of 7.55kg, weight of 74.0N, and disperses 680 cubic meters of water when immersed. i need to find the density. but im unsure how to find the volume first to put it into the formula?

asked by christy on May 21, 2015
30. ## Biology

In a lab on lung capacity where lung volumes (Tidal Volume, Expiratory Reserve Volume, Inspiratory Capacity, Inspiratory Reserve Volume, and Vital Capacity) are measured... Why can't you measure the Inspiratory Reserve Volume (IRV) directly? (In the

asked by Ash on January 2, 2013
31. ## Biology

In a lab on lung capacity where lung volumes (Tidal Volume, Expiratory Reserve Volume, Inspiratory Capacity, Inspiratory Reserve Volume, and Vital Capacity) are measured... Why can't you measure the Inspiratory Reserve Volume (IRV) directly? (In the

asked by Ash on December 31, 2012
32. ## physics

An automobile with an initial speed of 3.25 m/s accelerates uniformly at the rate of 3.2 m/s 2 . Find the final speed of the car after 4.4 s. Answer in units of m / s

asked by Anonymous on October 5, 2014
33. ## physics

How long does it take an automobile traveling 62.0 km/h to become even with a car that is traveling in another lane at 37.5 km/h if the cars' front bumpers are initially 138 m apart? in seconds

asked by Megan on September 29, 2011
34. ## 11th phyics

An automobile with an initial speed of 4.56 m/s accelerates uniformly at the rate of 2.4 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s

asked by Taylor on September 26, 2010
35. ## MacroEconomics

A B C D E Automobile 0 2 4 6 8 Forklifts 30 27 21 12 0 If the economy characterized by this production table and curve were producing 3 auto and 20 forklifts, what could you conclude about its use of its available resources?

asked by John on July 6, 2009
36. ## physics

the change of velocity of an automobile during a 5.0-s period is 20m/s in the due easterly direction. What is the magnitude and direction of its average acceleration

asked by Kevin Chen on October 24, 2010
37. ## physics

a curve of radius 50 m is to be banked, so that the automobile may make a turn at a speed of 15 m/s without depending on friction. at what angle should the road be banked?

asked by mee on September 18, 2012
38. ## Physics

An automobile with 0.80-m diameter wheel starts from rest and accelerates uniformly to 22 m/s in 0.7 s. Through how many revolutions does the front wheel turn during this period?

asked by Cindy on February 25, 2013
39. ## physics

An automobile with an initial speed of 6.60 m/s accelerates uniformly at the rate of 3.9 m/s^2 Find the final speed of the car after 5.2s Answer in units of m/s

asked by Anonymous on October 14, 2012
40. ## physics

an automobile with an initial speed of 4.30 m/s accelerates uniformly at the rate of 3.00m/s^2. fine the final speed and the displacement after 5.00s

asked by yy on September 22, 2010
41. ## survey of science

if a automobile with a mass of 500kg hits another car that has a mass of 650kg produces a force of 1800n, find the acceleration

asked by angel on March 28, 2011
42. ## physics

An automobile with an initial speed of 3.25 m/s accelerates uniformly at the rate of 3.2 m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s

asked by Teni on October 1, 2014
43. ## physics

An automobile with an initial speed of 6.60 m/s accelerates uniformly at the rate of 3.9 m/s^2 Find the final speed of the car after 5.2s Answer in units of m/s

asked by Anonymous on October 14, 2012
44. ## AP Chemistry

The molar mass of a volatile liquid (one which vaporizes easily) can be determined by a the DUMAS METHOD.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with a piece of foil that

asked by D on November 4, 2010
45. ## chemistry

The molar mass of a volatile liquid(one which vaporizes easily) can be determined by a the 'Dumas Method.' In this process a small amount of the liquid (a few drops) is placed in a clean flask. The mouth of the flask is covered with a piece of foil that

asked by Dee on November 3, 2010
46. ## math

the manager of a starbucks store plans to mix A grade coffee that cost 9.50 per pound with grade B coffee that cost 7.00 per pound to create a 20 pound blend that will sell for 8.50 a pound. how many pounds of each grade coffee are required?

asked by faye on October 30, 2012
47. ## algebra

The coffee counter charges \$9.00 per pound for Kenyan French Roast coffee and \$8.00 per pound for Sumatran coffee. How much of each type should be used to make a 20-lb blend that sells for \$8.40 per pound? Answer: Kenyan-8 lb; Sumatran-12 lb. Can someone

asked by C on May 19, 2008
48. ## Social Studies

Which statement best evaluates the overall effects of water projects in New Mexico? Water projects have cost billions of dollars but offer little real benefit. Water projects make it possible for more people to live, work, and farm in the state.++++++++++

asked by Mike on October 15, 2015
49. ## chemistry

If I wanted to make two solutions. In one I will mix Chemical A into 1 Liter of water. In the second I will mix Chemical B into 1 Liter of water. If I want my two solutions to be the same concentration they should contain the same number of PARTICLES. How

asked by anthony on January 11, 2016
50. ## Science

May you please tell me if these are true or false, if they are false then can I have the true statement, thank you In the water cycle, water returns to Earth as (condensation) usually in the form of rain or snow During dry weather, the water level in a

asked by Veronica on September 29, 2014
51. ## Chemistry

CaH2 is so reactive with water that it can be used to "dry" solvents other than water. If a sample if solvent that contains a total of 14g of water is added to 24.6g of calcium hydride, which of these will remain after the reaction is complete: water or

asked by Amanda on October 4, 2009
52. ## Algebra 1

The upward velocity of the water in the stream of a particular fountain is given by the formula v = -32t + 28, where t is the number of secondds after the water leaves the fountain. While going upward, the water slows down until, at the top of the stream,

asked by Craig on October 11, 2007
53. ## Physics - bobpursley

Imagine a landing craft approaching the surface of Callisto, one of Jupiter's moons. If the engine provides an upward force (thrust) of 3270 N, the craft descends at constant speed; if the engine provides only 2190 N, the craft accelerates downward at 40

asked by COFFEE on February 6, 2007
54. ## chemistry

Determine the concentration of 20.0 mL of the sulphuric acid when 1.00 mol/L sodium hydroxide is used as the titrant. Observations: Initial volume of H2SO4 __________. Final volume of H2SO4 __________. Volume of H2SO4 added __________.

asked by dev on April 28, 2016
55. ## Chemistry

Determine the concentration of 20.0 mL of the sulphuric acid when 1.00 mol/L sodium hydroxide is used as the titrant. Observations: Initial volume of H2SO4 __________. Final volume of H2SO4 __________. Volume of H2SO4 added __________.

asked by Emanuela on May 26, 2017
56. ## chemistry

A 9.35 gram of ring with it's volume of 0.654 cm3 is an alloy of gold and with density of gold and silver respectively 19.3 g/cm3 and 10.5 g/cm3 assume there is no change in volume when pure metals are mixed. calculate volume of gold?

asked by Anonymous on November 7, 2016
57. ## science

4. A 70.0 g sample of water at 95.00°C is mixed with 50.0 g of water at 135.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. Remember that the heat gained by the cooler water is equal to the heat lost by the

asked by Lilian on April 22, 2015
58. ## physical science

For each pair of substances, which of the substance with more thermal energy and explain why. a.500 g of water at 35„aC vs. 500 g of water at 85„aC b.500 g of water at 35„aC vs. 250 g of water at 35„aC I don't know how to determine the answer

asked by Randylin on July 5, 2011

1) An ideal gas occupies a volume of 0.60 m^3 at 5atm and 400K. What volume does it occupy at 4.0atm and a temp of 200K? I know how to find the volume with the m^3 and the atm but it threw me off since it gives the 4.0 atm and the temp 200K.

asked by Hannah on February 4, 2010
60. ## Chemistry

A solution is prepared by dissolving 10.8 g of ammonium nitrate in enough water to make 100.0 mL of solution. A 10.0 mL portion of this sample is diluted to 50.0 mL total volume. What is the molarity of the final solution?

asked by Juan Hernandez on January 7, 2015
61. ## Chemistry

The volume of 10 ml of H2SO4 solution was diluted 250 ml with distilled water. This resulting solution, 25 ml were neutralized by 10 ml of 0.1 mol/L solution of NaOH. calculate the Molarity of sulfuric acid.

asked by David on March 1, 2017
62. ## College Chem

Oxygen gas has a Henry's law constant of 1.66*10^-6 M/mm Hg at 40 degree C when dissolving in water. If the total pressure of gass (O2 gas plus water vapor) over water is 1.0 atm, what is the concentration of O2 in the water in grams per milliliter?

asked by Kimmy on October 15, 2013
63. ## Mathamatics

Choose the two true statements from the following. Options A) If the rate of inflation as measured by the RPI is 2%, then a pension index linked to the RPI will increase by 2%. B) A price ratio of 0.8 corresponds to a price decrease of 80%. C) If the price

asked by S Rey on June 4, 2010
64. ## HEEEEEEELP

HI I have no idea what's Alternative energy source . Can anyone help me in giving me a defintion for it thanx An alternative energy source is an additional one that is not being used already. It depends on what source is predominant or currently being

asked by Anonymous on December 28, 2006
65. ## Physics

I've tried everything and can't come up with the correct answer. Help! A liter of water has a mass of 1 kg and the mass of a water molecule is 18 amu. How many molecules of water are there in 4 L of water?

asked by John on July 3, 2016
66. ## Calculus

Find the radius, volume, and hieght of the right- circlar cylindar that can be inscribed in a right- circular cone with a radius of 6 inches and a hieght of 10 inches. There are an infinite number of solutions to this. Did you mean the right cylinder with

asked by Tyler on November 28, 2006
67. ## Physics also

A cylindrical diving bell 5 m in diameter and 10 m tall with an open bottom is submerged to a depth of 150 m in the ocean. The temperature of the air at the surface is 20 degrees Celsius, and the air temp 150 m down is 2 degrees Celsius. The density of

asked by Phil on January 7, 2009
68. ## Physics - Submerged Cylinder

A cylindrical diving bell 5 m in diameter and 10 m tall with an open bottom is submerged to a depth of 150 m in the ocean. The temperature of the air at the surface is 20 degrees Celsius, and the air temp 150 m down is 2 degrees Celsius. The density of

asked by Phil on January 7, 2009
69. ## Physics

How long does it take an automobile traveling 68.5 km/h to become even with a car that is traveling in another lane at 56.5 km/h if the cars’ front bumpers are initially 145 m apart? Answer in units of s.

asked by Alisa on September 23, 2014
70. ## Physics

An automobile traveling 50km/hr. It decelerates at 5 meter per second square. How long will it take to stop the car? How far will the car travel after a brakes are applied?

asked by Grace on January 11, 2016
71. ## Phiysics

An automobile traveling 50km/hr. It decelerates at 5 meter per second square. How long will it take to stop the car? How far will the car travel after a brakes applied?

asked by Grace on January 11, 2016
72. ## statistics

2. Classify the following variable as nominal, ordinal, discrete, or continuous and state why it is such a variable: number of automobile accidents per year (Points : 3)

asked by vickie on December 25, 2011
73. ## physics

An automobile wheel with a 9.00-cm radius and the radius to the rim is 7cm, as shown below, rotates at 2.50 rad/s. How fast does a point 6.50 cm from the center travel? 1 cm/s

asked by javane on November 26, 2010
74. ## physics

An automobile tire has a radius of 0.455 m, and its center moves forward with a linear speed of v = 15.7 m/s. Determine the angular speed of the wheel.

asked by Katie on March 11, 2012
75. ## physics

How long does it take an automobile traveling 68.3 km/h to become even with a car that is traveling in another lane at 54.3 km/h if the cars’ front bumpers are initially 121 m apart? Answer in units of s.

asked by laura on September 8, 2011
76. ## Physics

How long does it take an automobile traveling 74.3 km/h to become even with a car that is traveling in another lane at 58.3 km/h if the cars’ front bumpers are initially 114 m apart? Answer in units of s

asked by Brandon on September 24, 2012
77. ## physics

In an Automobile a 44 kg passenger moving at 40 m/s is brought to rest by an air bag during a 0.1 s what is the magnitude of the average force exerted on the passenger during this time ?

asked by AMOOON on June 11, 2016
78. ## Statistics

The lifetime of a certain type of automobile tire (in thousands of miles) is normally distributed with mean 43 and standard deviation 7. Find the percentile corresponding to p = 29% of the tire lifetimes.

asked by Anonymous on June 16, 2013
79. ## physics

How long does it take an automobile traveling 66.8 km/ h to become even with a car that is traveling in another lane at 50.8 km/ h if the cars" front bumpers are initially 144 m apart? Answwe in units of s.

asked by Deawn on August 31, 2013
80. ## Physics

How long does it take an automobile traveling 62.9 km/h to become even with a car that is traveling in another lane at 48.9 km/h if the cars’ front bumpers are initially 130 m apart? Answer in units of s.

asked by Brittney on September 14, 2015
81. ## physics

Which of the following could be considered to be an 'accelerator' in an automobile? A. brake pedal B. gas pedal (choose this one but says wrong) C. steering wheel D. All of these can cause the car to accelerate.

asked by anonymous on March 11, 2014

An automobile with an initial speed of 4.56m/s accelerates uniformly at the rate of 2.4m/s2. Find the final speed of the car after 4.4 s. Answer in units of m/s.

asked by Taylor on September 21, 2010
83. ## Physics

An automobile with an initial speed of 6.12m/s accelerates uniformly at the rate of 4.4 m/s^2.Find the final speed of the car after 4.6 s. Answer in units of m/s

asked by Roseanna on September 17, 2014
84. ## physics

How long does it take an automobile traveling 64.7 km/h to become even with a car that is traveling in another lane at 53.7 km/h if the cars’ front bumpers are initially 132 m apart? Answer in units of s

asked by Sonia on September 17, 2012
85. ## physics

An automobile traveling at 14.0km/h along a straight, level road accelerates to 65.0km/h in 5.30s . What is the magnitude of the auto’s average acceleration in m/s^2?

asked by Jen on September 5, 2013
86. ## Math :)

Since the purpose of an ice cube is to keep a drink cold, is it better for an ice cube to have a high volume or a low volume? I thought that the higher the volume, the longer the amount of time the ice cube does NOT melt. Which one is best? Thank you. :)

asked by Mariana W. on April 10, 2016
87. ## chemistry

A 9.35 gram of ring with it's volume of 0.654 cm3 is an alloy of gold and with density of gold and silver respectively 19.3 g/cm3 and 10.5 g/cm3 assume there is no change in volume when pure metals are mixed. The volume of gold is?

asked by sami on November 7, 2016

Hi, Im learning about polymers. I did a lab to make slime where I mixed PVA glue & water. I then added borax to some water in another container, and the poured off the water from the wet borax. I then added the borax to the glue/water solution. I have to

asked by Heidi on May 28, 2008
89. ## Maths

Hi! I'm working on a math assignment... My teacher wants me to find rainfall data and then work out the volume of water that would fall on a roof. I've already worked out the roof area but the roof is made up of multiple squares. The teacher would like me

asked by Sasha on March 31, 2011
90. ## Calculus (Definite Integrals - Fluid Pressure)

The ends of a water trough have the shape of the region bounded by the graphs of y = x2 and y = 4 with x and y both measured in feet. To what depth must the trough be filled with water so that the force exerted by the water on either end of the trough is

asked by Casablanca on March 12, 2012
91. ## science

A 30.0 g sample of water at 280. K is mixed with 50.0 g of water at 330 K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings. Remember that the heat gained by the cooler water is equal to the heat lost by the warmer

asked by Lilian on April 22, 2015
92. ## algebra

a storage bin is shaped like a cylinder with a hemisphere shaped top. the cylinder is 45 inches tall. the volume of the bin is 4131 pi cubic inches. find the radius of the bin. i think [4(pi)r(cubed)]/3=volume of hemisphere and h (pi) r squared volume of

asked by ken on November 1, 2010
93. ## Algebra

The vendor of a coffee cart mixes coffee beans that cost \$7 per pound with coffee beans that cost \$5 per pound. How many pounds of each should be used to make a 50-pound blend that sells for \$5.79 per pound?

asked by Kim on September 22, 2014
94. ## physics

A power station with an efficiency of 0.35 generates 10^8 W of electric power and dissipates 1.86 ✕ 10^8 W of thermal energy to the cooling water that flows through it. Knowing the specific heat of water in SI units is 4184 J/kg°C, calculate how many

asked by boy on July 16, 2014
95. ## Chemistry;HELP

1. A sample of gas under a pressure of 622 kPa has a volume of 233 cm3. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure? 2. The pressure exerted by a gas is 2.0 atm while it has

asked by Unknown on August 21, 2013
96. ## CHEMISTRY!! D:

1. A sample of gas under a pressure of 622 kPa has a volume of 233 cm3. The pressure is increased to 988 kPa, while the temperature remains constant. What volume will the gas occupy at this pressure? 2. The pressure exerted by a gas is 2.0 atm while it has

asked by Unknown on September 3, 2013
97. ## College Chemistry

Oxygen has a Henry’s law constant of 1.3*10^-3 mol/kg*bar at 25 °C when dissolving in water. If the total pressure of gas ( gas plus water vapor) over water is 1.00 bar, what is the concentration of O2 in the water in grams per milliliter? (The vapor

asked by Pablo on February 3, 2016
98. ## 7th g-math

An ice-cream shop offers a small size cone and a large size cone. The height of the large cone is 2 times the height of the small cone. The radius of the large cone is 2 times the radius of the small cone. Which statement is true about the volumes of the

asked by Cassidy on February 25, 2013
99. ## Chemistry

I've been stuck on this question for awhile now. I'm having a lot of trouble figuring out how to start it. If you had added exactly 20.00 mL do d.i. water before the titration, calculate the molar concentration of OAc- would have been at the end of the

asked by Rich on March 4, 2016
100. ## Physics

After a shipwreck, a solid steel spoon lies at the bottom of the ocean, 5.75km below the surface. What's the water pressure at that depth? Find the fractional volume change in the spoon due to compression forces.

asked by Jaclyn on December 12, 2011