Saturday

September 20, 2014

September 20, 2014

**Recent Homework Questions About Operating Systems**

Post a New Question | Current Questions

**MATH**

For what integer 0<n<1000, does the following system of n linear equations have no complex solution? −10a1a1a1⋮a1+a2−10a2+a2+a2+a3+a3−10a3+a3+…+…+…+…+an+an+an−10an=9=99=999⋮=10n−1 ...
*Tuesday, May 14, 2013 at 9:41am*

**Algebra Please Help**

Find the sum of integers c for all triples of integers (a,b,c),a≤b≤c, that satisfy the system of equations a^2−bc=91 b^2−ac=91 c^2−ab=91 Details and assumptions If a number c appears in several different triples (a,b,c), it must be counted with ...
*Monday, May 13, 2013 at 11:04pm*

**Physical Education **

(a) Calculate the average blood velocity in the major arties given that the aorta has a radius of 1.0 cm, the blood velocity is 30 cm/s in the aorta, and the total cross-sectional area of the major arties is 20 cm2 (b) What is the total flow rate? (c) On the assumption that ...
*Monday, May 13, 2013 at 10:29pm*

**HARD CHEM QUESTION- any help appreciated **

Phosgene (COCl2) is a poisonous gas that dissociates at high temperature into two other poisonous gases, carbon monoxide and chlorine with equilibrium constant Kp = 0.0041 at 600 K. Find the equilibrium composition of the system after 0.124 atm of COCl2 is allowed to reach ...
*Monday, May 13, 2013 at 8:48pm*

**Thermodynamics**

In a multiple-device flow system, I want to determine a state property. Where should I look for information, upstream or downstream?
*Monday, May 13, 2013 at 7:18pm*

**Physical Science**

A dentist’s chair with a patient in it weight 2100N. The output plunger of a hydraulic system begins to lift the chair, when the dentist’s foot applies of 55N to the input piston. Neglect any height difference between the plunder and the piston. What is the ratio of ...
*Monday, May 13, 2013 at 2:25pm*

**algebra!!!! please help me!!!!**

Find the number of real solutions of the system of equations. x^2−y^2=z y^2−z^2=x z^2−x^2=y
*Monday, May 13, 2013 at 10:24am*

**PreCalculus**

PLEASE HELP ME ASAP!!!!!!!!!!!! :) I really need to remember on how to do this equation. Solve the system algebraically. y=25x^2+x 9x+y=3
*Sunday, May 12, 2013 at 10:31pm*

**Physics- Simple machines**

A wheel and axle arrangement has an axle with a diameter of 25cm. A rope is wrapped around the axle and is supporting a load of 2 tonnes. 1) If the mechanical advantage of the system is 30, determine the diameter of the wheel___________m. 2)Determine the effort required to ...
*Sunday, May 12, 2013 at 7:04pm*

**physical chemistry**

The system N2O4 <--->2NO2 maintained in a closed vessel at 60º C & a pressure of 5 atm has an average (i.e. observed) molecular weight of 69, calculate Kp. At what pressure at the same temperature would the observed molecular weight be (230/3)
*Sunday, May 12, 2013 at 11:41am*

**Math**

Went ahead and did the HW the teach recommended but she did not post the answers and I would like to see if im on the right track. Problem 1: Are the vectors (2,−1,−3), (3, 0,−2), (1, 1,−4) linearly independent? Problem 2 : Is the set {x E R^4 : (x1 &#...
*Saturday, May 11, 2013 at 11:51am*

**Physics**

A block of mass m = 2.80kg is held in equilibrium on a frictionless incline of angle= 56.6 by the horizontal force F. (a) Determine the value of F.(b) Determine the normal force exerted by the incline on the block. Hint: Draw a free-body diagram of the block. Choose a ...
*Thursday, May 9, 2013 at 9:37pm*

**social studies**

the federal system info on national government (enumerated powers). info on state government (reserved powers) info on both (concurrent powers)
*Wednesday, May 8, 2013 at 5:01pm*

**ochem**

Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. Predict the order of elution of the components in this mixture on the TLC plate when solvent system a, b or c is used. a)Cyclohexane: Methylenechloride:100%:0% b)Cyclohexane: ...
*Tuesday, May 7, 2013 at 11:25pm*

**URGENT~MATH For Steve or Reiny**

For questions 5-7, find the solution to the system of equations by using either graphing or substitution. 5)y=6-x and y=x-2 (1point) (2,4) (-4,2) (4,2) no solutions 6)y=2x-1 and y=x+3 (1point) (4,7) (7,4) (-7,-4) no solutions 7) y=4x and y+x=5 (1point) (-4,1) (1,4) (-3,2) (2,3...
*Tuesday, May 7, 2013 at 2:30pm*

**Physics**

In a control system, an accelerometer consists of a 5.15-g object sliding on a calibrated horizontal rail. A low-mass spring attaches the object to a flange at one end of the rail. Grease on the rail makes static friction negligible, but rapidly damps out vibrations of the ...
*Tuesday, May 7, 2013 at 8:02am*

**Health **

WITH STARS IS MY ANSWER! (*) 1) A drug created by a chemical reaction in some foods, especially fruits and grains A= neurons B= cirrhosis C= alcohol ****** D= depressant 2) Being drunk A= intoxicated ****** B= withdrawal C= alcohol D= minor 3) Cells that make up the nervous ...
*Monday, May 6, 2013 at 9:22pm*

**physics**

A 16 lb block rests on a horizontal frictionless surface. A cord attached to the block, running horizontally, passes over a pulley whose diameter is 1 in, to a hanging block weighing 16 lb. The system is released from rest, and the blocks are observed to move 7.6 ft in 4 s. ...
*Monday, May 6, 2013 at 9:04pm*

**Personal Finance**

PLEASE HELP ME ASAP!!!!!!!!!!!! 32. Which is not a horrible mortgage option? a. ARM b. Conventional c. Reverse mortgage d. Balloon I answered c and I am not sure if that is right or not. 33. Why do you plan for retirement instead of relying on Social Security to take care of ...
*Monday, May 6, 2013 at 7:10pm*

**justice system**

1. “Substantive due process” refers to: A. the content of a law. B. the application of law. C. the application of penalties. D. criminal procedure. is it A 2. __________ is the act of taking a person into custody. A. Search and seizure B. Arrest C. Detention D. ...
*Monday, May 6, 2013 at 3:29pm*

**Justice system**

1. Murder implies malice, whereas __________ does not. A. manslaughter B. willful homicide C. forcible rape D. aggravated assault is it A 2. __________ involves sexual intercourse with a corpse. A. Pederasty B. Bestiality C. Necrophilia D. Buggery is it C 3. Fred Brown gets ...
*Monday, May 6, 2013 at 3:08pm*

**Hospitality Management Accounting **

i dont really understand what kind of calculations they are asking for Charlie is thinking of spending $3,000 more in year 2004 on advertising (part of marketing expense). Because of his marketing courses, he believes he can design appealing advertisements to be placed in ...
*Monday, May 6, 2013 at 7:17am*

**Introduction to Victimology **

•a definition of victimology •its history and how it has developed •explain how its different from criminology, sociology, or psychology •Who established the first safe houses for battered women, as well as where and when these safe-houses were established...
*Monday, May 6, 2013 at 12:00am*

**physics**

A light spring with a spring constant of 15.2 N/m rests vertically on the bottom of a large beaker of water, as shown in (a) below. A 5.26 10-3 kg block of wood with a density of 636.0 kg/m3 is connected to the spring, and the mass-spring system is allowed to come to static ...
*Sunday, May 5, 2013 at 10:13pm*

**chemistry**

Consider the gold-platinum system which has a value of delta w of -4250 J/mole; (a) Calculate the enthalpy of mixing for a solution of 10% platinum and 90% gold. Express your answer in units of kJ/mole. (b) Is the dissolution of 10% platinum into gold an endothermic or an ...
*Saturday, May 4, 2013 at 6:24am*

**WorldHistory**

Check? What are the three ways that civilization in western Europe declined after the Roman Empire fell? Answer: 1. Decline of centralized government-Barbarian invasions of Britain, Gaul, Italy and parts of the Eastern Roman Empire led local populations to try to protect ...
*Friday, May 3, 2013 at 7:01pm*

**WorldHistory**

How was the structure of the Church like that of the feudal system? Feudalism is based on three things: fief, fealty, and faith. Translation: land, loyalty, religion. So basically the Church was a very important part of feudal society because it owned tons of land throughout ...
*Friday, May 3, 2013 at 4:26pm*

**WorldHistory**

Check? What are the three ways that civilization in western Europe declined after the Roman Empire fell? Answer: 1. All government stopped and didn't exist after the fall of Rome. The society fell apart . 2. Because of no government there was no army for protection and ...
*Friday, May 3, 2013 at 4:12pm*

**maths**

Consider the following system of inequalities: {(c−1)x^2+2cx+c+4≤0 cx^2+2(c+1)x+(c+1)≥0 The sum of all real values of c, such that the system has a unique solution, can be written as ab, where a and b are coprime positive integers. What is the value of a+b? ...
*Friday, May 3, 2013 at 4:29am*

**Sociology**

8 complete sentences, compare and contrast the kinship and marriage system of the Kaluli and the Minangkabau.
*Friday, May 3, 2013 at 12:14am*

**statistics**

Linda Silbers is a social scientist studying voter opinion about a city bond proposal for a light rail mass transit system in Denver If Linda wants to be 90 percent Confident that her sample estimate of the proportion of voters who favor the bond is within 2 percent of the ...
*Thursday, May 2, 2013 at 9:35pm*

**algebra**

Consider the following system of inequalities: {(c−1)x^2+2cx+c+4≤0 cx^2+2(c+1)x+(c+1)≥0 The sum of all real values of c, such that the system has a unique solution, can be written as ab, where a and b are coprime positive integers. What is the value of a+b? ...
*Thursday, May 2, 2013 at 3:53pm*

**chemistry**

Consider the gold-platinum system which has a value of delta w of -4250 J/mole; (a) Calculate the enthalpy of mixing for a solution of 10% platinum and 90% gold. Express your answer in units of kJ/mole.
*Thursday, May 2, 2013 at 11:18am*

**Math**

5. Find the solution to the system of equations by using either graphing or substitution. y = 6 – x and y = x – 2 (2, 4) (–4, 2) (4, 2) no solutions 6. y = 2x – 1 and y = x + 3 (1 point)(4, 7) (7, 4) (–7, –4) infinite solutions 7. y = 4x and y + ...
*Thursday, May 2, 2013 at 10:18am*

**economics**

19-1 Bicycle Insurance and Information Asymmetry If bicycle owners do not know whether they are high- or low-risk consumers, is there an adverse selection problem? 19-2 IPOs and Adverse Selection Should owners of a private company contemplating an IPO (a sale of stock to the ...
*Thursday, May 2, 2013 at 1:20am*

**economics**

19-1 Bicycle Insurance and Information Asymmetry If bicycle owners do not know whether they are high- or low-risk consumers, is there an adverse selection problem? 19-2 IPOs and Adverse Selection Should owners of a private company contemplating an IPO (a sale of stock to the ...
*Thursday, May 2, 2013 at 12:58am*

**Justice system**

Although its meaning may vary from one culture to the next, __________ appears to be an almost universal taboo. A. murder B. rape C. theft D. incest im confused between B n D 2. “Common law” refers to: A. offenses committed against the safety and order of the state. ...
*Wednesday, May 1, 2013 at 3:39pm*

**Justice system**

In contrast to the Warren Court, the Burger Court appeared to support a/an: A. due process model. B. crime control model. C. corrections model. D. inmates model. is it B 2. Natural law is best described as: A. the laws of the church. B. a body of principles and rules that are ...
*Wednesday, May 1, 2013 at 3:26pm*

**Justice system**

1. The crime control model: A. stresses the possibility of error in the stages leading to trial. B. believes in protecting society from criminal behavior. C. emphasizes the need to protect procedural rights. D. assumes that justice is better served if everyone gets his or her ...
*Wednesday, May 1, 2013 at 3:16pm*

**Justice system**

1. The majority of historical and scholarly evidence suggests that poverty: A. and crime tend to increase at the same time. B. may serve to perpetuate crime but is not a major cause of crime. C. and crime are totally unrelated. D. and crime rates stand in an inverse ...
*Wednesday, May 1, 2013 at 3:04pm*

**Chen=mistry**

Sodium metal reacts violently with water to form NaOH and release hydrogen gas. Suppose that 3.00 g of Na reacts completely with 3.00 L of water and the final volume of the system is 3 L. What is the molarity M of the NaOH Solution formed by the reaction?
*Wednesday, May 1, 2013 at 8:44am*

**Biology **

Which of these systems is involved in connecting one body system with another? A. Integumentary B.Muscular C. Immune D. Digestive E. Endocrine I think its E
*Tuesday, April 30, 2013 at 12:10pm*

**biology**

1. The function of the circulatory system is to: A. Deliver oxygen and nutrients to every cell B. facilitate communication between different tissues c. Remove Wastes from tissues d. all of these e.none of these I believe the answer is D all of them
*Tuesday, April 30, 2013 at 12:05pm*

**Statistics**

A study of 420,048 cell phone users found that 135 of them developed cancer of the brain or nervous system. prior to this study of cell phone use the rate of such cancer was found to be 0.0333% for those not using cell phones. Complete parts (a) and (b) a. use the sample data ...
*Tuesday, April 30, 2013 at 1:04am*

**Math**

I need help to set the equation up to solve a system to ensure that I get the answer of (-2, 4)? I also need tosolve two problems in the quadratic equation method, the two problems are x to the second power - 2x - 13 = 0 then the other is x to the second power + 12x - 64 = 0 I...
*Monday, April 29, 2013 at 10:32pm*

**Computers**

1. An 7-bit counter is wired as follows: The CLK input to the first stage (LSB) is the system clock. Each stage's output is used as the CLK input to the next higher stage. This counter is a: A. MOD 128 ripple counter B. MOD 256 synchronous counter C. MOD 256 ripple counter...
*Monday, April 29, 2013 at 3:16pm*

**algebra**

Consider the following system of inequalities: {(c-1)x^2+2cx+c+4<0 { cx^2 + 2(c+1)x+(c+1)>0 The sum of all real values of c, such that the system has a unique solution, can be written as ab, where a and b are coprime positive integers. What is the value of a+b? Details ...
*Monday, April 29, 2013 at 11:46am*

**physics**

A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. One is a 50 g piece of copper at 84°C. The other sample has a mass of 58 g and is originally at a temperature of ...
*Monday, April 29, 2013 at 11:09am*

**MAths**

Consider the following system of inequalities: (c−1)x^2+2cx+c+4≤0 ---- (1) cx^2+2(c+1)x+(c+1)≥0 ---- (2) The sum of all real values of c, such that the system has a unique solution, can be written as a/b, where a and b are coprime positive integers. What is ...
*Monday, April 29, 2013 at 4:20am*

**economics**

Help me reword this?? The Fed is organized as a corporation, owned by its member banks, and directed by a government-appointed board. Monetary policy affects the size of the money supply and the level of interest rates. The first "tool" of monetary policy—and ...
*Sunday, April 28, 2013 at 10:15pm*

**Math**

Solve the following system: 4x-y+z=6 2x+y+2z=3 3x-2y+z=3 Find the values for x, y, and z
*Sunday, April 28, 2013 at 12:19pm*

**Physics**

A 39.0 kg box initially at rest is pushed 4.50 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following. (a) the work done by the applied force J (b) the increase in ...
*Sunday, April 28, 2013 at 8:23am*

**College Physics**

A uniform meter stick of mass M has an empty paint can of mass m hanging from one end. The meter stick and the can balance at a point 19.9 cm from the end of the stick where the can is attached. When the balanced stick-can system is suspended from a scale, the reading on the ...
*Saturday, April 27, 2013 at 10:55pm*

**History**

My teacher wanted me to make an essay about slavery.. This is my essay: At the time of the American Revolution, the split between North and South over the issue of slavery was apparent but not great enough to prevent the states from uniting as one nation. Delegates to the ...
*Saturday, April 27, 2013 at 8:04pm*

**Physics**

Inside an insulated container, a 250-g ice cube at 0°C is added to 200 g of water at 18°C. (i) What is the final temperature of the system? (ii) What is the remaining ice mass?
*Saturday, April 27, 2013 at 10:05am*

**physics**

two charge 5NC and -2NC are placed at a point (5cm,0,0)and (23cm,0,0)in a region of a space where there is no other electric field.calculate the electrostatic potential energy of this charged system
*Saturday, April 27, 2013 at 3:25am*

**Physics**

A spring oriented vertically is attached to a hard horizontal surface as in the figure below. The spring has a force constant of 1.64 kN/m. How much is the spring compressed when a object of mass m = 2.35 kg is placed on top of the spring and the system is at rest?
*Friday, April 26, 2013 at 9:23pm*

**Lincoln College Of New En**

The percentage of physicians who are women is 27.9% in a survey of physicians employed by a large university health system, 45 of 120 randomly selected physicians were women. Is there sufficient evidence at the 0.05 level of significance to conclude that the proportion of ...
*Friday, April 26, 2013 at 1:29pm*

**Science**

What are the diseases of the respiratory system?
*Thursday, April 25, 2013 at 11:13pm*

**physics**

A particle moves through an xyz coordinate system while a force acts on it. When the particle has the position vector vector r = (2.00 m)ihat - (3.00 m)jhat + (2.00 m)khat, the force is vector F = Fxihat + (7.00 N)jhat - (5.30 N)khat and the corresponding torque about the ...
*Thursday, April 25, 2013 at 11:54am*

** math pre calc**

at the pittsburch zoo, children ride a train for 25 cents, adults pay $1 and seniors pay .75. on a given day, 1400 passengers paid a total of $740 for the rides. there were 250 more children riders than adults and senior riders combined.find the nu,ber of each type of rider. ...
*Thursday, April 25, 2013 at 1:28am*

**Physics! Please help me!**

An oscillating block-spring system has a mechanical energy of 5.1 J, an amplitude of 0.81 m, and a maximum speed 1.6 m/s. Find the spring constant k of the spring. What is the mass of the block? What is the frequency of oscillation?
*Wednesday, April 24, 2013 at 6:31pm*

**7th Grade Health Ms. Sue**

1. The body's functions are slowed when alcohol reaches where? (1 point) The stomach The heart The liver The brain 2. Which statement is NOT true? (1 point) Regular use of alcohol can lead to addiction. Alcoholism can be cured. Someone cannot cause someone else to drink. ...
*Wednesday, April 24, 2013 at 2:09pm*

**MATH..-HELP ME PLEASE GUYS..THIS DUE TMORROW!!!!..**

Suppose tank A consist of 500 liter brine with 500gm salt dissolved in it, whereas in tank B containing 500 liter of water. Water is allowed to enter tank A at a rate of 30 liter/minute, and that mixed solution flow from tank A to tank B at a rate of 40 liter/minute. At the ...
*Wednesday, April 24, 2013 at 2:04pm*

**10 grade algebra**

In the following system of equations, what does x equal? -10x - 2y = 56 6x - 2y = -40 x = 6 or x = -6 or x = 2 or x = -2
*Wednesday, April 24, 2013 at 9:45am*

**10 grade algebra**

15. In the following system of equations, what does x equal? -10x + 4y = -64 -10x - 8y = -112
*Wednesday, April 24, 2013 at 9:29am*

**PLEASE HELP CHEM!!**

You work with the following system: 2X(g) <---> Y(g) At, equilibrium, [Y]=3[X]. If K=10, calculate the [Y] at equilibrium.
*Tuesday, April 23, 2013 at 11:23pm*

**calculus**

the telephone company is planning to introduce two new types of executive communications systems that it hopes to sell to its largest commercial customers. It is estimated that if the first type of system is priced at x hundred dollars per system and the second type at y ...
*Tuesday, April 23, 2013 at 10:14pm*

**Angular Resolution**

An astronomer wants to determine whether or not he or she can photograph Castor and Pollux at the same time on a 5 x 8 inch plate using a lens system with a 1200 mm focal length. If the two stars are approximately 5 degrees apart, will it be possible to make the photograph?
*Tuesday, April 23, 2013 at 9:45pm*

**algebra 1,urgent**

the expression (4x^2-3x+1)-(x^3+2x+7) what is the coefficient of the x term in the simplified expression? what is an equation of a line parallel to the line with equation 2 y=14-6x a.y=-6x+18 b.y=-3x-9 c.y=6x+3 d.y=3x+8 Solve linear system, which substitution of unkowns is ...
*Tuesday, April 23, 2013 at 6:36pm*

**physics**

A particle moves through an xyz coordinate system while a force acts on it. When the particle has the position vector vector r = (2.00 m)ihat - (3.00 m)jhat + (2.00 m)khat, the force is vector F = Fxihat + (7.00 N)jhat - (5.30 N)khat and the corresponding torque about the ...
*Tuesday, April 23, 2013 at 5:45pm*

**Medical Billing and Coding**

1. You're an outpatient coder in Dr. Smith's office. When you code procedures, you're probably using _______ codes. A. ICD-10-CM B. ICD-9-CM C. HCPCS D. CPT ANSWER 2. You're a coder who's reviewing the record of a 62-year-old woman who was admitted to the ...
*Tuesday, April 23, 2013 at 1:16pm*

**Physics**

If in a manufacturing company they want to produce a system where the force F1 must be 10% of the output force F2.if the area of the pistol (where F1 is applied)is 450 spuare milimetre.calculate the diameter of the pistol two where F2 is an output force
*Tuesday, April 23, 2013 at 12:43pm*

**chemistry**

In a bottle of unopened cola, the CO2 dissolved in the liquid is in equilibrium with the CO2 gas above the liquid. The dissolved gas reacts with water molecules in the liquid to from carbonic acid, which also dissociates into carbon dioxide and water. Which chemical equation(s...
*Tuesday, April 23, 2013 at 12:05pm*

**Math**

System A has a 10% chance of being "down", while system B has a 5% chance of being "down". What is the probability that: 1) Neither computer system will be operational. 2) Both computer systems will be operational. Thanks!
*Tuesday, April 23, 2013 at 1:06am*

**Medical Billing & Coding**

1. You're an outpatient coder in Dr. Smith's office. When you code procedures, you're probably using _______ codes. A. ICD-10-CM B. ICD-9-CM C. HCPCS D. CPT ANSWER 2. You're a coder who's reviewing the record of a 62-year-old woman who was admitted to the ...
*Monday, April 22, 2013 at 8:53pm*

**Algebra 1**

What is an equation of a line perpendicular to the line with equation y = 1 - 3x a.y=-3x + 5 b. y=3x + 5 c.y=-1/3x + 5 d. y=1/3x + 5 To solve the linear system below, which substitution of unkowns is proper ? x + 4y= -6 5x - 3y = -16 a. substitute -4y-6 for x in the first ...
*Monday, April 22, 2013 at 7:00pm*

**english**

is correct to say "the patient was brought to the operating room." ? "was brought" seems awkward. Instead, "the patient was taken to the OR."
*Monday, April 22, 2013 at 6:37pm*

**physics**

Calculate the pressure in newtons per square meter due to whole blood in an IV system, such as the one shown in Figure 6.9, if h = 1.5 m. (b) Noting that there is an open tube, so that atmospheric pressure is exerted on the blood in the bottle, calculate the total pressure ...
*Monday, April 22, 2013 at 7:45am*

**chem**

Which of the following solutions represent a buffer system? Select all that apply. Answer A. H2CO3 and HCO3- B. HNO2 and NaNO2 C. NH4Br D. Na2SO4 E. HClO4 and NaClO4 F. CH3COOH
*Monday, April 22, 2013 at 12:20am*

**HARD CHEM QUESTION**

A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <-->2H2(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: the reaction quotient initially.
*Sunday, April 21, 2013 at 7:35pm*

**chem!**

You work with the following system: 2X(g) <---> Y(g) At, equilibrium, [Y]=3[X]. If K=10, calculate the [Y] at equilibrium.
*Sunday, April 21, 2013 at 7:34pm*

**PLEASE HELP CHEM!!**

5.6 x 10-6 mol of A and 5 x 10-5 mol of B are mixed in a 200 mL flask. The system is represented by the equation: 2A(G) + B(G) <--> 3C(G) At equilibrium, there is 4.8 x 10-5 mol of B. Calculate the value of the equilibrium constant.
*Sunday, April 21, 2013 at 7:33pm*

**math**

x^2+16xy+y^2-8=0 Write the appropriate rotation formulas so that in a rotated system the equation has no x'y'-term
*Sunday, April 21, 2013 at 7:10pm*

**math numerical methods**

Consider the following second order differential equation: y"-2x^(2)y+y^(3)=17cos(4x) with y(0)=4 , y'(0)=-9 If we let u=y and v=y′ then as an AUTONOMOUS first order system, the second order differential equation is correctly expressed as:
*Sunday, April 21, 2013 at 3:06am*

**Daycare managment**

1. Which of these is a benefit of unstructured outdoor play? A. Learning of rules B. Emotional well-being C. Video game skill D. Learned helplessness 2. Children are considered obese when they're ______ percent over their ideal body weight. A. 15 B. 10 C. 20 D. 40 3. A(n) ...
*Saturday, April 20, 2013 at 4:29pm*

**Agricultural science**

From your research on poultry farming,name one intensive and one extensive system of poultry keeping(farming).
*Saturday, April 20, 2013 at 11:12am*

**Science**

An electromagnet is ____. A. a permanent magnet B. made with bar magnets C. able to attract all metal substances D. only operating when the current is on I think it is D..?
*Friday, April 19, 2013 at 2:56pm*

**Algebra 1**

1. How many solutions does the linear system have ? 3x - y = 4 -3x + 11y = 2 2. A line passes through the points (6,4) and (5,-3). What is the equation of the line in point-slope form ? a. x - 6 = 7(y-4) b. y - 4 = 7(x-6) c. y + 6 = 7(x+4) d. y - 6 = 7(x-4) 3. A line passes ...
*Friday, April 19, 2013 at 10:33am*

**physics**

Consider the Hamiltonian H=Z⊗3 acting on 3 qubits. What is the ground energy of the system? (I.e. the lowest eigenvalue of H?) What is the dimension of the ground energy subspace? (I.e. multiplicity of that eigenvalue?) Which of the following correctly describes the ...
*Friday, April 19, 2013 at 5:13am*

**physical**

During July 1995 the comet Shemaker-Levy 9 smashed into Jupiter in a spectacular fashion. The comet actually consisted of 21 distinct pieces, teh largest of which had a mass of about 4x1012 kg and a speed of 6x104 m/s. Jupiter, the largest planet in the solar system , has a ...
*Thursday, April 18, 2013 at 11:38pm*

**Math**

Solve for the following system of equAtions for y: 2x + y = 10 3x =y
*Thursday, April 18, 2013 at 8:17pm*

**Algebra 1**

1.To solve the linear system below, which substitution of unkowns is proper ? A.substitute 5x-16 for y in the first eqn B.substitute 5x+16 for y in the first eqn C.substitute 5x+12 for y in the first eqn D.substitute 7y-4 for x in the second eqn 2.A line with a slope of -2 ...
*Thursday, April 18, 2013 at 7:29pm*

**government**

A multi-party system a. tends to produce a stable government. b. helps one party win the support of a majority of voters. c. is composed of parties with special interests. d. promotes the ideological consensus of the public.
*Thursday, April 18, 2013 at 2:08pm*

**Calc**

What is the solution of this system? 2x + 3y = 32 11y − 2x = 52 A. x = 3/2 , y = 5 B. x = 4, y = 8 C. x = 7, y = 6 D. x = 10, y = 4 E. x = 8, y = 16/3
*Thursday, April 18, 2013 at 11:56am*

**English**

Please check my answers! Thanks :) 1. In Yeats’s poem “The Second Coming,” the falcon and the falconer are images that most likely represent *something out of control and unnatural. the beauty and abundance of nature. a sad, uncomfortable image of old age. 2. ...
*Thursday, April 18, 2013 at 11:20am*

**chemistry**

Explain why exothermic processes are mire likely spontaneous when temperature of the system is low?
*Thursday, April 18, 2013 at 9:55am*

**MECHANICAL ENGINEERING**

Need help with some engineering math problems? 1. You wish to determine the total system efficiency of your hydraulic press that is powered by an electric motor. The characteristics of the hydraulic press are as follows: •Electric motor utilizes 5 amps under load & ...
*Thursday, April 18, 2013 at 1:07am*

**Chemistry**

What is the pH of a buffer system that contains 0.18M NH4+ and 0.14M NH3? The pKa of NH4+ is 9.25.
*Thursday, April 18, 2013 at 12:02am*

**non linear equations**

find all solutions of the system. y+x^2=-5x y-5x=25
*Wednesday, April 17, 2013 at 9:53pm*

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