Sunday
August 31, 2014

Posts by eddy


Total # Posts: 56

Physics
Hertz is 1/second and RPM would be 1/minute hertz * 60 = RPM RPM / 60 = hertz therefore 45/60 = 0.75 Hz
May 25, 2014

medical billing and coding
Ok thanks
January 7, 2014

medical billing and coding
I came up with 575.11, is that correct?
January 7, 2014

medical billing and coding
What is the icd 9 cm code for chronic cholecystitis and cholelithiasis?
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 PROCEDURE PERFORMED: ...
January 6, 2014

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 N/m and slides on a ...
September 30, 2013

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 sound reaching your ...
July 29, 2013

trigonometry hlp me
6.Prove that tan y cos^2 y + sin^2y/sin y = cos y + sin y 10.Prove that 1+tanθ/1-tanθ = sec^2θ+2tanθ/1-tan^2θ 17.Prove that sin^2w-cos^2w/tan w sin w + cos w tan w = cos w-cot w cos w 23.Find a counterexample to shows that the equation sec a &#...
January 2, 2013

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
October 30, 2012

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
February 16, 2012

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 booster rockets no ...
November 2, 2011

Physics
In a slow-pitch 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 ball increases...
November 2, 2011

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?
September 29, 2011

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 head-on elastic collision with ...
August 9, 2011

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 head-on elastic collision with ...
August 9, 2011

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.
August 3, 2011

physics
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
June 1, 2011

chemistry
A 1.00-g 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 half-life of carbon-14 is 5.73×103 year...
April 25, 2011

chemistry
Typo: The half-life is 5.7x10^3
April 25, 2011

chemistry
A 1.00-g 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 half-life of carbon-14 is 5.73×103 year...
April 25, 2011

chemistry
A ^232Th source is rated at 42 curies. How many thorium atoms disintegrate in 10 minutes?
April 25, 2011

chemistry
A given reaction has an activation energy of 24.52 kJ/mol. At 25C the half-life is 4 minutes. At what temperature will the half-life be reduced to 20 seconds?
April 9, 2011

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?
April 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
April 6, 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
March 23, 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^+ ->...
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?
March 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?
March 2, 2011

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. 6 M e. 0 M
February 9, 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 cause the...
February 9, 2011

spelling 2nd grade
what is 2 grade sentence with fine
January 23, 2011

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
November 19, 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?
November 16, 2010

chemistry - DrBob222
would my final answer be 3.2 g
November 15, 2010

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 like this please? Thank...
November 15, 2010

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
November 14, 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, I know that in order ...
April 20, 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 bowling ball ...
April 20, 2010

Physics
So does it mean that the ball with grooves can reach a higher velocity and rebound to a greater height?
April 19, 2010

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 balls are not worn after ...
April 19, 2010

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 unchanged before it hits...
April 18, 2010

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.
April 13, 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 method (Scanning, ...
February 25, 2010

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 the motion? (book ...
February 23, 2010

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 i have to do. thanks
February 18, 2010

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 for this question.
February 18, 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?
February 12, 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 the magnitude and ...
February 4, 2010

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.
February 4, 2010

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 cost associated with ...
February 3, 2010

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 cholecystectomy ...
January 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?
November 27, 2009

History
k that wasn't helpful. i dont want your opinion to me asking a question
November 27, 2009

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. B. a good means of ...
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.
September 8, 2007

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 ...
October 4, 2006

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