Eddy
Most popular questions and responses by Eddy
College Physics
a 1200kg car coasts from rest down a driveway that is inclined 20degrees. to the horizontal and is 15m long. how fast is the car going at the end of the delivery if.... (a) friction is negligible (book answer is 10m/s) (b) a friction force of 3000n opposes
asked on February 23, 2010 
Cemistry
When a 0.952 g sample of an organic compound containing C, H,and O is burned completely in oxygen, 1.35 g of CO2 and0.826 g of H2O are produced. What is the empiricalformula of the compound?
asked on September 29, 2011 
Physics
In a slowpitch softball game, a 0.200 kg softball crossed the plate at 10.00 m/s at an angle of 45.0° below the horizontal. The batter hits the ball toward center field, giving it a velocity of 44.0 m/s at 30.0° above the horizontal. If the force on the
asked on November 2, 2011 
physics
Four identical charges (+2.0ìC each) are brought in from infinity and fixed to a straight line. The charges are located 0.40 meters apart. Determine the electric potential energy of this group.
asked on February 4, 2010 
physics
A player kicks a football at an angle of 45 degree with initial speed of 20 metre per second a second player on the goal line 60 metre away in the direction of a kick start training to receive the ball at that instant find the constant speed of the second
asked on March 6, 2016 
math
each student in an art class has 48 identical 1 cm cubes. Each student glues all of his or her cubes together to make a rectangular solid. No two solids are identical. What is the maximum number of students in that art class ?
asked on October 7, 2015 
Language Arts
What is the infinitive phrase in this sentence? After reading about the events in world war ll, she wanted to visit the Holocaust museum? A)After reading B)About events in WW2 C)she wanted D)to visit the holocaust museum I think it's D, but then again I
asked on June 4, 2015 
chemistry
A given reaction has an activation energy of 24.52 kJ/mol. At 25C the halflife is 4 minutes. At what temperature will the halflife be reduced to 20 seconds?
asked on April 9, 2011 
College Physics
copute the power output of a machine that lifts a 500 kg crate through a height of 20.0 m in a time of 60.0 s . book answer is 1.63 kw can you help me plug the numbers into the correct formula to use. then i should have no problem doing the other problems
asked on February 18, 2010 
chemistry
can someone please help me with this question: mass of ferrous ammonium sulfate = 4g mass of k3(fe(c204)3)*3h2o = 4.25 g 1) using the above mass of ferrous ammonium sulfate calculate the theoretical yield of k3(fe(c204)3)*3h2o? 2) the percent yeild of it?
asked on November 16, 2010 
calculus
Evaluate the integral by interpreting it in terms of areas. int_(0)^(9) (7/2x  21)dx can someone please help me with this question i keep on getting the wrong answer...the answer i got was 324/4
asked on November 19, 2010 
Physics (mechanics)
There are two parts for this questions... "When a bowling ball collides with the pins, the momentum of the bowling ball and the pins is conserved." Give the assumptions and conditions for this statement. Compare the effect on the collision between the
asked on April 20, 2010 
chemistry
A reaction rate increases by a factor of 815 in the presence of a catalyst at 37 degrees C. The activation energy of the original pathway is 106 kJ/mol. What is the activation energy of the new pathway, all other factors being equal?
asked on April 9, 2011 
College Physics
the driver of a 1200 kg car notices that the car slows from 20 m/s to 15 m/s as it coasts a distance of 130 m along level ground. how large a force opposes the motion? (book answer .81 kN ) can you help me plug the numbers into the correct formula to use
asked on February 18, 2010 
chemistry
For the reaction 4NH3(g) + 3O2(g) > 2N2(g) + 6H2O(g) , K = 10^80 at a certain temperature. Initially, all reactants and products have concentrations equal to 12 M. What is the approximate concentration of ammonia at equilibrium? a. 3 M b. 12 M c. 18 M d.
asked on February 9, 2011 
chemistry  DrBob222
For this question can u please explain steps 3 and 4 4.0 g of ferrous ammonium sulphate, FeS04(NH4)2 SO4 6H20, is used. The oxalate is in excess, calculate the theoretical yield of the iron complex. Can someone please show me how to calculate a question
asked on November 15, 2010 
PHYSICS
An astronaut of mass 78.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.500 m/s. With the
asked on November 2, 2011 
chemistry
A 40 mL sample of 0.25 M NaCHOO is titrated with 0.2 M HCl. What is the pH of the solution after 140 mL of HCl has been added?
asked on March 2, 2011 
chemistry
A 1.00g sample of carbon from a modern source gave 15.3 disintegrations per minute. A sample of carbon from an “old” source gave 920 disintegrations per hour. What is the age of the “old” sample of carbon? The halflife of carbon14 is 5.73×103
asked on April 25, 2011 
chemistry
Imagine a hypothetical reacion for which, H = 0 kJ · mol−1. Considering the Le Chatelier principle, which of the following statements is true? a. Raising the temperature of the system will have no effect. b. Raising the temperature of the system will
asked on February 9, 2011 
physics
Suppose you are stopped for a traffic light, and a fast ambulance approaches you from behind with a speed of 34.0 m/s. The siren on the ambulance produces sound with a frequency of 960 Hz. The speed of sound in air is 343 m/s. What is the wavelength of the
asked on July 29, 2013 
Physics
Please help me... :( There is a moving bowling ball on the track. A student says, "After the ball is thrown horizontally on the wooden track with horizontal velocity v and zero angular velocity, the translational kinetic energy of the ball remains
asked on April 18, 2010 
Physics
Two balls have masses 44 kg and 86 kg. The 44 kg ball has an initial velocity of 80 m/s (to the right) along a line joining the two balls and the 86 kg ball is at rest. The 86 kg ball has initial velocity of −24 m/s. The two balls make a headon elastic
asked on August 9, 2011 
chemistry
Consider the reaction: A + B −> C If it is 2nd order in A and 0 order in B, a plot of [B]−1 vs time will be... a. linear and negative b. exponential and negative c. linear and positive d. equal to zero e. exponential and positive
asked on April 6, 2011 
chemistry
The redox reaction: O3SOOSO3^2− + Cr^3+ > HSO4^− + Cr2O7^2− is carried out in aqueous acidic solution. Which elements are undergoing changes in oxidation state? I thought it would be S and Cr. For the balanced equation, I got 3O3SOOSO3+Cr^3+ + 13H^+
asked on March 23, 2011 
economic s
are there any welfare or subsidy payments that should be reviewed
asked on May 31, 2015 
Physics1
When a mass of 21 g is attached to a certain spring, it makes 23 complete vibrations in 5.0 s. What is the spring constant of the spring? Answer in units of N/m
asked on February 16, 2012 
chemistry
A 1.00g sample of carbon from a modern source gave 15.3 disintegrations per minute. A sample of carbon from an “old” source gave 920 disintegrations per hour. What is the age of the “old” sample of carbon? The halflife of carbon14 is 5.73×103
asked on April 25, 2011 
Science
Who were the parents of world famous biologist George Beals Schaller? Since this is not my area of expertise, I searched Google under the key words "'George Beals Schaller' parents" but did not find the names of his parents. Sorry that I cannot be of more
asked on October 4, 2006 
Statistics
Several states, including California, have passed legislation requiring automakers to sell a certain percentage of zeroemissions cars within their borders. One current alternative is batterypowered cars. The major problem with batteryoperated cars is
asked on April 10, 2016 
Physics
A container with a oneliter capacity at 27 degree C is filled with helium to a pressure of 2 atm. how many moles of helium does it hold?
asked on March 9, 2015 
Physics
Two golf balls of equal size and mass are released simultaneously from the roof of a building. One of the balls has a smooth surface while the other one has grooves on it. They then hit on a hard and horizontal plane on the floor. Assume that the golf
asked on April 19, 2010 
math
Ben is taller than Jerry by more than 8 inches but less than 12 inches. If Jerry is 60 inches tall, how tall is Ben?
asked on February 12, 2010 
math
How much pure anti freeze must be added to 10 gal of 10% antifreeze solution to increase its concentration to 60 % anti freeze? If X represents the number of pure antifreeze solution, what is the correct statement of the problem?
asked on September 4, 2017 
Statistics
θ=0.5 θ=1 θ=2 θ=3 λ = 2 θ = 0.5 μ = 0.5 σ = 0.5 θ=0.5 0 2 1 0.270670566 2 0.036631278 3 0.004957504 4 0.000670925 5 9.07999E05 draw the graph for θ=1 θ=2 θ=3 The first θ=0.5 graph was drawn for you so follow the same procedure for the others.
asked on April 5, 2016 
math
there are three consecutive positive integers such that the sum of the squares of the smallest two is 221. write and equation to find the three consecutive positive integers let x= the smallest integer
asked on October 30, 2012 
Chemistry
1. Show quantitatively how you would prepare a solution of 3.10 x 10^2 g of 0.125 molar (m) ethylene alcohol from ethylene glycol and water.
asked on August 3, 2011 
chemistry
O3SOOSO3^(2−) + Cr^(3+)+ > HSO4^(1) + Cr2O7^(2). Could someone balance this redox reaction for me? I can't figure it out. Thanks
asked on March 23, 2011 
chemistry
HOOC CH(CH2CH2SCH3)NH3+ , the amino acid methionine, has pKa1 = 2.2 and pKa2 = 9.1. If this amino acid is represented by H2L+, what is the major species at pH 6?
asked on March 2, 2011 
physics
A DVD is spinning at constant velocity. Compare and contrast the accelection of point A at the rim of the DVD and point B halfway between the centre and the rim.
asked on April 13, 2010 
PHYSICS 1112
A cube of side length L = 10 cm is centered at the origin of an x,y,z (cartesian) coordinate system. The electric potential V (x, y, z) is measured at the centers of the six faces of the cube to be the values shown below. Using this information, estimate
asked on February 4, 2010 
History
What was the most important iron manufacturing center in the south? Why did Utopian societies emerge in the antebellum united states? Unitarians and transcendentalists stressed the goodness of the individual and?
asked on November 27, 2009 
Chemistry
Could some one please help me I need to balance an equation using the lowest possible coefficients including state of compounds, I am struggling with it. The equation is Al4C3 + H2O > Al(OH)3 + CH4 I would be very grateful for any help.
asked on September 8, 2007 
phys223
What is the amplitude of the motion? Remember, at t = 0 a block with mass M = 5 kg moves with a velocity v = 2 m/s at position xo = .33 m from the equilibrium position of the spring. The block is attached to a massless spring of spring constant k = 61.2
asked on September 30, 2013 
trigonometry help me
6.Prove that tan y cos^2 y + sin^2y/sin y = cos y + sin y 10.Prove that 1+tanθ/1tanθ = sec^2θ+2tanθ/1tan^2θ 17.Prove that sin^2wcos^2w/tan w sin w + cos w tan w = cos wcot w cos w 23.Find a counterexample to shows that the equation sec a – cos
asked on January 2, 2013 
math
Suppose you have to establish a new company. Suggest in which item or items company should deal. How much sale of the item is required in order to reach at break even point depending on the suggested price of item, production capacity, fixed and variable
asked on February 3, 2010 
Metallurgy
what are cast iron boring scarp and other types of scrap used for steel making?
asked on May 16, 2018 
medical billing and coding
What is the icd 9 cm code for chronic cholecystitis and cholelithiasis?
asked on January 7, 2014 
medical coding
1.LOCATION: Inpatient, Hospital PATIENT: Margaret Hill ATTENDING PHYSICIAN: Ronald Green, MD SURGEON: Gary Sanchez, MD PREOPERATIVE DIAGNOSIS: Chronic cholecystitis and cholelithiasis POSTOPERATIVE DIAGNOSIS: Chronic cholecystitis and cholelithiasis
asked on January 6, 2014 
chemistry
A ^232Th source is rated at 42 curies. How many thorium atoms disintegrate in 10 minutes?
asked on April 25, 2011 
PLEASE HELP  english
If something has a higher surface area what does that mean? can it me said that it is more thicker? please and thank you
asked on November 14, 2010 
Social Studies
Include a practical example of the philosophers idea in your response. .... I have write a paper on a way to solve street racing and under age drinking using the COPPS philosophy and write a formal report to the chief of police. I have to use the S.A.R.A
asked on February 25, 2010 
History
Which workers were generally better off in America then Europe before 1860? A. unskilled workers. B. skilled workers. C. white collar workers or D. middle managers The use of corporation was important because it provided investors with A Limited Liability.
asked on November 27, 2009

chemistry
fuick you
posted on February 21, 2018 
math
so far this what i clearly understand 10 gallons of 10% antifreezee solution so 1 gallon has 10% antifreeze and 90%water. so it's 1 gallon of antifreeze and 9 gallons of water which make up the 10 gallons total but i do not know how to proceed from here
posted on September 4, 2017 
math
thanks,Steve and Anonymous,but i do not understand.please,i will need you to elucidate a little bit more.if you could give me the steps explaining them,that would not only provide the answer but also teach me how to do it and the logic behind it. thanks
posted on September 4, 2017 
Math
the total cost of the lot =1,000,000 she has to give a down payment of 20% 20x1,000,000=200,000 D.P = 200,000 SHE HAS 800,000 TO PAY OFF SHE WILL HAVE TO GIVE 12% (OF 800,000) EVERY YEAR FOR 10 YRS IN A ROW 12% OF 800,000=96,000 EVERY YEAR SHE WILL HAVE TO
posted on September 4, 2017 
physics
For a)85(2.5)+30(1.5)=257.5
posted on June 1, 2017 
Human Resources
need help with this question write a case of multiple approachavoidance conflict and how to react to it.include all variance of multiple approachavoidance conflict
posted on March 9, 2016 
physics
34.09m/s
posted on March 6, 2016 
Physics
You have this equation: Velocity = 2pi x radius / T So... V = 2pi x 0.7 meters / (20.7 sec / 8 rotations) That should give you the right answer. As a note, T, the time it takes to complete a period, has a unit of sec / rotation in this case, even if it may
posted on February 13, 2016 
Government Help Please
The answer should be 4. If you think about it, it makes sense too, because in the Senate, elections take place every 6 years, and the thought is that it tends to remove them from the desires of their constituents as time goes on. The Founders wanted at
posted on February 3, 2016 
Physics
Hertz is 1/second and RPM would be 1/minute hertz * 60 = RPM RPM / 60 = hertz therefore 45/60 = 0.75 Hz
posted on May 25, 2014 
physic
fn = nV/4L for container open at one end. remember distance is in cm! therefore d1 = 0.229m. 384 = (1)V/(4)(0.229) therefore: V = 350 m/s
posted on May 25, 2014 
medical billing and coding
Ok thanks
posted on January 7, 2014 
medical billing and coding
I came up with 575.11, is that correct?
posted on January 7, 2014 
Medical Coding
PATIENT: Margaret Hill ATTENDING PHYSICIAN: Ronald Green, MD SURGEON: Gary Sanchez, MD PREOPERATIVE DIAGNOSIS: Chronic cholecystitis and cholelithiasis POSTOPERATIVE DIAGNOSIS: Chronic cholecystitis and cholelithiasis PROCEDURE PERFORMED: Laparoscopic
posted on January 6, 2014 
spelling 2nd grade
what is 2 grade sentence with fine
posted on September 25, 2012 
College Physics
Two balls have masses 44 kg and 86 kg. The 44 kg ball has an initial velocity of 80 m/s (to the right) along a line joining the two balls and the 86 kg ball is at rest. The 86 kg ball has initial velocity of −24 m/s. The two balls make a headon elastic
posted on August 9, 2011 
chemistry
Typo: The halflife is 5.7x10^3
posted on April 25, 2011 
chemistry  DrBob222
would my final answer be 3.2 g
posted on November 15, 2010 
Physics
So does it mean that the ball with grooves can reach a higher velocity and rebound to a greater height?
posted on April 21, 2010 
Physics (mechanics)
The material has not been properly covered in the course, but I have done some research on the net and tried to answer it myself, but this assignment counts a lot towards my final grade, so I just wanna make sure everything is right... For the first part,
posted on April 20, 2010 
History
k that wasn't helpful. i don't want your opinion to me asking a question
posted on November 27, 2009