Homework Help: Computers: Operating Systems

Recent Homework Questions About Operating Systems

Programming Logic
Shemrock Inc. is a brake pad manufacturing company. This company uses raw materials, such as carbon powder, iron, ash, and resin. It wants to develop an inventory management system that will have the following features: 1.The system should store the current inventory levels ...
Thursday, April 12, 2012 at 6:40pm

6th grade geo
in which area would you find coal veins? in contrast to the southern uplands and the highlands, the central lowlands of Scotland which of the following is an accurate statement about the way that the welsh economy has changed in the late twentieth century Scotland’s lakes...
Thursday, April 12, 2012 at 4:20pm

criminal justice
What is the technological and management system that aims to make the police better organized and more effective crime fighters?
Thursday, April 12, 2012 at 11:35am

physics
The device called an At-woods machine.if m2 is greatr than m1 an assumng th pulley to be frictionless and massless.1.how far will m2 fall in th time T aftr the system is released? 2.what is th tension in the cord that connect two massess? 3. If m1=5kg and m2=3kg,what is the ...
Thursday, April 12, 2012 at 6:03am

physics
A space vehicle is coasting at a constant velocity of 20.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.270 m/s2 in the +x direction. After 48.0 s, the pilot ...
Thursday, April 12, 2012 at 12:06am

Chem Lab
Can the NH3/NH4Cl system be sued to prepare a buffer of a pH 9.5? why or why not? Can it prepare a buffer of pH 5? There were two buffers, 0.2 M and 0.1M.
Wednesday, April 11, 2012 at 11:21pm

physics
How do you know that a sealed calorimeter is a closed system? because temperature is consurved because the masses of the sample and water are equal because thermal energy is not transferred to the environment because work is done on the test sample Please help me
Wednesday, April 11, 2012 at 9:15pm

English
i writing a process analysis essay on topic staying healthy in winter and i making it a directional type of process analysis essay because it be easy to direct people on how to do things. the only points i get for staying healthy in winter be wearing warm clothing, covering ...
Wednesday, April 11, 2012 at 8:24pm

Physics. PLEASE HELP!!
A ball bounces to 45 percent of its original height. What fraction of its mechanical energy is lost each time it bounces? What is the coefficient of restitution of the ball-floor system?
Wednesday, April 11, 2012 at 6:43pm

Accounting
Identify whether each description best applies to a periodic or a perpetual inventory system. a. Provides more timely information to managers. b. Requires an adjusting entry to record inventory shrinkage. c. Markedly increased in frequency and popularity in business within the...
Wednesday, April 11, 2012 at 3:20pm

physics
Consider 3 liters of an ideal (monatomic) gas at a pressure of 34 atm and a temperature of 356K. Call this state of the system A. Using the ideal gas law, calculate the number of moles of gas present in the system. 3.49 The temperature of the system is reduced, keeping the ...
Wednesday, April 11, 2012 at 1:51pm

College physics
A 0.006 00-kg bullet traveling horizontally with a speed of 1.00 x 10^3 m/s enters an 20.1-kg door, imbedding itself 10.9 cm from the side opposite the hinges as in the figure below. The 1.00-m wide door is free to swing on its frictionless hinges. At what angular speed does ...
Wednesday, April 11, 2012 at 1:40pm

physics
two perfect elastic balls of same mass m are moving with velocities u1 and u2 . they collide elastically n times. the kinetic energy of the system finally is?
Wednesday, April 11, 2012 at 9:08am

Chemistry
Which of the following is the most effective buffer system for a pH value of 7.45? Assume all are 1M A. Carbonic acid and sodium bicarbonate B. Sodium bicarbonate and sodium carbonate C. Sodium dihydrogen phosphate and disodium hydrogen phosphate D Hydrogen cyanide and sodium ...
Wednesday, April 11, 2012 at 8:09am

math-inequalities
graph solution set of system of inequalities x+y< 4 x-2y>6
Wednesday, April 11, 2012 at 2:14am

physics
A 40-g block of ice is cooled to −71°C and is then added to 590 g of water in an 80-g copper calorimeter at a temperature of 27°C. Determine the final temperature of the system consisting of the ice, water, and calorimeter. (If not all the ice melts, determine ...
Wednesday, April 11, 2012 at 2:05am

Computer Science
I am making a object oriented program and hashing the list of make of an electronic and type to the JCombobox...i am getting this number Exception error...it will nice if you could tell why am i getting it eventhough i am doing the casting and everything. Try to help ASAP! ...
Tuesday, April 10, 2012 at 9:59pm

physics
The system in the Figure is in equilibrium. A mass M1 = 242.0 kg hangs from the end of a uniform strut which is held at an angle theta = 41.0o with respect to the horizontal. The cable supporting the strut is at angle alpha = 27.0o with respect to the horizontal. The strut has...
Tuesday, April 10, 2012 at 8:57pm

calculus test corrections. 1 question
Find the minimum value of f(x, y) = y – x + 1 for the polygonal convex set determined by this system of inequalities. x > 0 y > 0 2x + y< 4 the answer is -1. please tell me why
Tuesday, April 10, 2012 at 7:48pm

Pre-calculus
Find the minimum value of f(x, y) = y – x + 1 for the polygonal convex set determined by this system of inequalities. x > 0 y > 0 2x + y< 4 the answer is -1. please tell me why
Tuesday, April 10, 2012 at 2:12pm

calculus test corrections. 1 question
Describe the linear programming situation for this system of inequalities. x < 1 y > 0 3x + y < 5 the answer is unbounded. please tell me why
Tuesday, April 10, 2012 at 2:10pm

physics
The source of all wave motion is ____________________. A) something vibrating.B) a harmonic object, or system of objects.C) any energy source.D) a region of high and low pressures.E) transverse motion.
Tuesday, April 10, 2012 at 12:55pm

Chemistry
You have 250mL of a 0.56M solution of sodium acetate. How many mL of 0.50M acetic acid should be added to make a buffer of pH 4.40? I think this is a buffer system so I would use pH=pka + log base/acid so would I set this up as 4.40 = 4.74 + log base/ 1.8e-5 from acetic acid?
Tuesday, April 10, 2012 at 10:43am

Biochemistry
In the electron transport chain, electrons from FADH2 are eventually used to reduce O2 into H2O. Experimentally, the proton motive force created by this process will generate 2 ATP molecules from ADP and Pi, using ATP synthase. From the information provided below, calculate ...
Tuesday, April 10, 2012 at 2:13am

chem-entropy
a glassblower heats glass (the system) to its softening temperature. Is the entrophy change of the system is positive or negative?
Monday, April 9, 2012 at 7:20pm

science
a 150g of a metal at 80degree C is placed in 100cm3 of pure water at 20degree C. the final temperature of the system (metal+water) is 23degree C. what is the specific heat of the metal? i got the ans -0.16 by using formula mCdelta T(water)=mCdeltaT(metal) but i am not sure if ...
Monday, April 9, 2012 at 4:20pm

Chemistry(Please check answers)
1)What is the pH of a saturated solution of lead(II) hydroxide? The Ksp= 4.0e-15 Pb(OH)2 4.0e-15 = (x)(2x)^2 = 4x^3 I divided by 4 and took the cube root and got 1.12e-5 but I am not sure I took the cube root correctly. -log(1.12e-5)= 4.95 14-4.95 = 9.05 The answer choices ...
Monday, April 9, 2012 at 4:12pm

physics
A horizontal water main with a cross-sectional area of 206 cm2 necks down to a pipe of area 42.4 cm2. Meters mounted in the flow on each side of the transition coupling show a change in gauge pressure of 71.0 kPa. Determine the flow rate through the system, taking the fluid to...
Monday, April 9, 2012 at 2:22pm

chemistry
Write an equilibrium reaction for a buffer system made of the weak base, B, and its conjugate acid. If the buffer contains 1.05 M of B and 0.750M conjugate acid and has a pH of 9.50, what is the pH after 0.0050 mol HCl is added to 0.500 L of this solution?
Monday, April 9, 2012 at 11:35am

English
Writeacher, I hope you can help me clarify the following sentences. I can't understand the relation between the knights and the barons. 1) Henry II was successful in bringing 3)order and stability. To avoid civil wars, he needed to reduce the power of the barons and wanted...
Monday, April 9, 2012 at 5:31am

Physics (12th Grade)
In changing the state of a system from state A to state B adiabatically the work done on the system is 322 J. If 100 cal f heat are given to the system in bringing it from state A to state B, then what will be the work done on the system in this process?
Monday, April 9, 2012 at 12:41am

Physics (12th Grade)
In a certain process 500 cal of heat is given to a system and the system does 100J of work. What will be the increase in internal energy of the system?
Monday, April 9, 2012 at 12:27am

Chemistry
N2 (g) + H2 (g) <--> NH3 (g) + energy Name the direction of equilibrium shift - The pressure of the system is increased. - H2 is added to the system. - The temperature of the system is decreased.
Sunday, April 8, 2012 at 11:54pm

Statistics
You are responsible for quickly fixing your company¡¯s computer system when it crashes. You know that there are three possible sources of errors in the system: the disk drive, the memory and the operating system. From an analysis of historical data, you find that 50...
Sunday, April 8, 2012 at 11:04pm

ALGEBRA
Solve the system. $ \left\{ \begin{tabular}{l} $ y = x + {\color{red}-2} $ \\ $ y = -{\color{red}3} x + {\color{red}10} $ \end{tabular} \right. $
Sunday, April 8, 2012 at 7:15pm

College Physics
A 40 kg child is standing on the edge of a merry-go-round in a playground. Before they were deemed too dangerous, these were quite common. They were just huge rotating platforms you could sit on while someone spun you around in uniform circular motion until you screamed in ...
Sunday, April 8, 2012 at 6:23pm

science
A ball of mass m is attached by two strings to a vertical rod. as shown above. The entire system rotates at constant angular velocity about the axis of the rod. a)Assuming is large enough to keep both strings taut, find the force each string exerts on the ball in terms of , m...
Sunday, April 8, 2012 at 2:53pm

Pre-calculus
Find the value for c for which the system is consistent and dependent. 3x + y = 5 4.5y = c + 9x Find the minimum value of f(x, y) = y – x + 1 for the polygonal convex set determined by this system of inequalities. x > 0 y > 0 2x + y< 4
Sunday, April 8, 2012 at 12:50pm

Pre-calculus
1)Which term best describes the linear programming situation represented by x+y=2 why is the answer infeasible? 2)Describe the linear programming situation for this system of inequalities. x < 1 y > 0 3x + y < 5 why is the answer unbounded?
Sunday, April 8, 2012 at 12:42pm

Calculus
The seesaw principle: As you probably know, any two persons can balance each other when sitting on opposite sides of a seesaw, regardless of their weights. It is only necessary that each person contribute the same moment â€” calculated by multiplying the person...
Sunday, April 8, 2012 at 9:08am

Physical Science
I need some help. I have tried working this problem and can't get it. A scale model of the solar system is being constructed where 40cm of the model represents 0.5 AU of actual distance. What is the model dimension, in meters, for the distance of Jupiter from the sun?
Sunday, April 8, 2012 at 2:22am

math
solve the system of linear equations 2x+2y=1 3x-y=6 thanks
Saturday, April 7, 2012 at 9:02pm

calculus
1)Which term best describes the linear programming situation represented by x+y=2 why is the answer infeasible? 2)Describe the linear programming situation for this system of inequalities. x < 1 y > 0 3x + y < 5 why is the answer unbounded?
Friday, April 6, 2012 at 8:26pm

Chemistry
Sulfur trioxide gas, one of the causes of acid rain, is produced in the upper atmosphere when oxygen reacts with sulfur dioxide gas in the reaction shown below: 2SO2(g) + O2(g) <--> 2SO3(g) deltaH0 = -197kJ The gases are placed in a reaction vessel and allowed to come to...
Friday, April 6, 2012 at 1:31pm

Physics
A proton is located at a distance of 0.430 m from a point charge of +8.30 µC. The repulsive electric force moves the proton until it is at a distance of 1.55 m from the charge. Suppose that the electric potential energy lost by the system is carried off by a photon that ...
Friday, April 6, 2012 at 11:14am

bookkeeping
what is the accounting system where you record revenue when the business earns it,and expenses at the time the business incurs them? (a)cash (b)GAAP (c)accrual (d)COGS my answer is c what is the time period called from the time the business opens to the last day of the twelfth...
Friday, April 6, 2012 at 10:35am

bookkeeping
a store purchased 500 in merchandise on account.using the periodic inventry system,how would you record your entry? (a)debit merchandise inventory 500 and credit accounts payable 500 (b)credit purchase 500 and debit accounts payable 500 (c)credit merchandise inventory 500 and ...
Friday, April 6, 2012 at 10:30am

biology
1.Describe the pathway of an unfertilized egg as it travels through the female reproductive system
Friday, April 6, 2012 at 9:36am

Physics
A mass of 1.0 kg is located at the end of a very light and rigid rod 44 cm in length. The rod is rotating about an axis at its opposite end with a rotational velocity of 3 rad/s. (a) What is the rotational inertia of the system? kg · m2 (b) What is the angular momentum ...
Friday, April 6, 2012 at 1:10am

Analyzing Financial Statements
EAT AT MY RESTAURANT-CASH FLOW With this case, we review the cash flow of several restaurant companies. The restaurant companies reviewed and the year-end dates are as follows: 1. Yum Brands, Inc. (December 30, 2008; December 30, 2007) "Through the five concepts ofKFC, ...
Thursday, April 5, 2012 at 3:32pm

math
how many solutions exist for the following system 3x-6y=12 and 2x-4y=7
Thursday, April 5, 2012 at 11:19am

chem
What mass of ice at 0°C can be melted by the addition of 1670 joules of heat? When the temperature is decreased on the following system at equilibrium: 2 HCl(aq) + Mg(s) <--> MgCl2(aq) + H2(g) + heat a. In order to restore equilibrium, the reaction shifts left, ...
Thursday, April 5, 2012 at 12:22am

Human resources
Role Play In this mock executive team meeting, you will assume the role and responsibility for a specific function (for example, human resources, marketing, finance, legal, and operations). The team will be given a scenario in which strategic decisions are to be made for rapid...
Wednesday, April 4, 2012 at 8:51pm

Intermediate Algebra
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 14x + 18y = -54,-4x – 14y = 42
Wednesday, April 4, 2012 at 7:49pm

Government
The hacienda system in latin america most closely resembled? A. communist states B. fuedal systems C. modern parliaments D. direct democracies Is it B?
Tuesday, April 3, 2012 at 8:49pm

finite math
Determine whether each system of linear equations has a)one and only one solution, b)infinitely many solutions, or c) no solution 2x-4y=5 3x +2y=6
Tuesday, April 3, 2012 at 6:29pm

chemistry
Consider the reaction at equilibrium: 2NO2(g) <---> N2O2(g) + O2(g) for which, H = −20.4 kJ · mol−1. If you decrease the temperature of the system, what will occur?
Tuesday, April 3, 2012 at 6:06pm

Economics
Does this thesis on a solution for welfare sound good?: "For the betterment of Canada, the welfare system needs to undergo a serious change in the rules for applying to welfare." I plan on listing each problem (one subtopic each) of welfare and than the solution and ...
Tuesday, April 3, 2012 at 5:58pm

chemistry
Consider the combustion of glucose: C6H12O6(s) + 6O2(g) <---> 6CO2(g) + 6H2O(g) H = −3 kJ/mol Which condition I) Adding more carbon dioxide; II) Performing the reaction in a hotter environment; III) Decreasing the pressure of the system; IV) Adding a reagent that ...
Tuesday, April 3, 2012 at 5:43pm

math
Find the solution of the given system by the method of addition that was used in Examples 4 and 5. If there is no solution or infinitely many solutions, state so. Put the value for x in the blank. 2x - 3y = 1; x + 2y = 4
Tuesday, April 3, 2012 at 5:31pm

bookkeeping
when a window is displayed in front of another window,its said to be? (a)a screen saver (b)minimized (c)the active window (d)multitasked my answer is c which of the following options is used to view a computers memory properties? (a)device manager (b)control panel (c)...
Tuesday, April 3, 2012 at 12:01pm

bookkeeping
to complete tasks quickly and efficiently a operating system has many special components that are known as? (a)routines (b)scripts (c)system files (d)processes my answer is c to start a program from an icon you should? (a)click the left mouse button (b)double click the left ...
Tuesday, April 3, 2012 at 7:40am

math
a sprinkler system on a baseball diamond rotates 120 degrees and sprays water up to 35 meters. What is the area of the diamond that can be watered with the sprinkler
Monday, April 2, 2012 at 9:37pm

Chemistry
Consider the reaction: N2O4(g) <--> 2NO2(g) delta H^o =58.576kJ; Keq =0.87 at 55degrees celsius What is the effect of each of these changes upon the concentration of N2O4 at equilibrium? a)increasing the temperature b)increasing the volume c) adding more NO2(g) to the ...
Monday, April 2, 2012 at 9:15pm

government
Which of the following statments is true about U.S. roads and highways? A. The Federal Government is a partner with the States in funding higways. B. The Interstate Highway System was completed in the 1950s. C. Few roadways are built with State funds. D. The Federal Government...
Monday, April 2, 2012 at 6:30pm

government
Which word describes the Spanish system of giving control of Indians to a settler for forced labor? A. hacienda B. encomienda C. hacendados D. campesinos
Monday, April 2, 2012 at 6:25pm

psy
17. <11{6[1(07)71]}> The higher the price of an antique, the greater people’s expectation that the object is rare. That, in turn, makes the antique appear more valuable. If the statements above are correct, then offering an antique for sale at a bargain price (...
Monday, April 2, 2012 at 12:31pm

System Analysis
Suppose you are an analyst developing a new executive information system intended to provide key strategic information from existing corporate databases to senior executives to help in their decision making. What type of metholodogy would you use?
Sunday, April 1, 2012 at 7:15pm

science
what you could conclude about the temperature of Mercury based on its position in the solar system?
Sunday, April 1, 2012 at 3:43pm

science
what you could conclude about the temperature of Mercury based on its position in the solar system?
Sunday, April 1, 2012 at 3:04pm

Physics
A dentist's chair with a patient in it weighs 2260 N. The output plunger of a hydraulic system begins to lift the chair when the dentist's foot applies a force of 61 N to the input piston. Neglect any height difference between the plunger and the piston. What is the ...
Sunday, April 1, 2012 at 12:19pm

Physics
The drawing shows two identical systems of objects; each consists of the same three small balls connected by massless rods. In both systems the axis is perpendicular to the page, but it is located at a different place, as shown. The same force of magnitude F is applied to the ...
Sunday, April 1, 2012 at 10:51am

math help please
A drainage system for a 40 acre field is designed to remove 3/8 inch of standing water from the entire field in 24 hours. What flow rate (gpm) must the drainage system achieve to meet the design specification?
Saturday, March 31, 2012 at 11:27pm

NARAYANA JUNIOR COLLEGE .PHYSICS
2 PARTICLES [FREE TO MOVE] WITH CHARGES +q and +4q are a distance L APART. A 3RD CHARGE IS PLACED SO THAT THE ENTIRE SYSTEM IS IN EQ2UILIBRIUM.FIND THE LOCATION,MAGNITUDE AND SIGN OF THE 3RD CHARGE
Saturday, March 31, 2012 at 9:03am

Physics
A 6 kg block moves at 5 m/s to the right while a 9.5 kg block moves at 8 m/s to the right. Find the total kinetic energy of the two-block system. Answer in units of J
Saturday, March 31, 2012 at 12:13am

algebra
use method of substitution to solve the system of linear equations. 2x-y=3 9x-4y=14 is the solution an ordered pair(,)
Friday, March 30, 2012 at 10:41pm

ALGEBRA
The perimeter of a rectangle is 18 ft.The length is 1 ft longer than the width. Find the deminsions using a system of linear equations.
Friday, March 30, 2012 at 10:12pm

ALGEBRA
solve this system of equations and solve for triple pair: x+y+z=8 2y+4y+2z=26 -x+8y-3z=26
Friday, March 30, 2012 at 9:51pm

Physics
Work of 700 J is done by stirring an insulated beaker containing 110 g of water. (a) What is the change in the internal energy of the system? J (b) What is the change in the temperature of the water? °C
Friday, March 30, 2012 at 6:02pm

PHYSÝCS HELP
A satellite with a mass of 113 kg approaches a large planet at a speed vi,1 =10.3 km/s. The planet is moving at a speed vi,2 =14.6 km/s in the opposite direction. The satellite partially orbits the planet and then moves away from the planet in a direction opposite to its ...
Friday, March 30, 2012 at 12:44pm

history
Which system of government rests furthest left on the political spectrum and, as a totalitarian regime, focuses on the government owning all aspects of the economy, including property and the means of production?
Friday, March 30, 2012 at 10:34am

Astronomy
Suppose you weigh 105 . How much would you weigh on other planets in our solar system? Assume you can stand either on the surface or in an airplane in the planet's atmosphere. (Hint: Recall from Chapter Light and Matter that weight is mass times the acceleration of gravity...
Friday, March 30, 2012 at 2:37am

health
What are the implications of this shift for hospitals, consumers, and the health care delivery system as a whole
Thursday, March 29, 2012 at 9:34pm

Science 7R
name in order the organs through which food passes as it moves through the digestive system
Thursday, March 29, 2012 at 9:24pm

Math
An unusual die has six faces labelled 1,2,3,5,7 9. If two of these dice are rolled, and the numbers showing on the upper faces are added, what is the number of possible different sums? 14? Flora had an average of 56% on her first 7 exams. What would she have to make on her ...
Thursday, March 29, 2012 at 9:15pm

algebra
use method of substitution to solve the system of linear equation 3x+4y=3/2 y=2x-1
Thursday, March 29, 2012 at 8:47pm

Lauguage arts and History
I need help these! Please help me! Thanks! Identify two parts of chapter 10 that struck you the hardest from Frederick Douglass’ descriptions. Create a T Chart with quotes on the left and your response on the right. 1) What should be done about the newly freed slaves? ...
Thursday, March 29, 2012 at 8:29pm

Science
Ok I am kinda stuck on this problem. So the question is; A measure of the average kinetic energy in an object is______________; so I really need an answer. The passage is about the solar system. Please help anything right now, even a word! Lol. Ok thank you if u answer!
Thursday, March 29, 2012 at 6:24pm

macroeconomics
explin the inner and outer flows of an open system
Thursday, March 29, 2012 at 5:13pm

computer science
You have been working for the XYZ Computer Corporation as an entry-level software engineering since you graduated from college last May. You have done very well so far; you are respected by management, well liked by your fellow employees , and have been assigned to a team of ...
Thursday, March 29, 2012 at 12:08pm

math
What is the tip speed (ft/min) of a 21 inch long rotary lawn mower blade that is connected to the output shaft of an engine operating at 3400 rpm? What are the steps to figure this out?
Wednesday, March 28, 2012 at 9:18pm

Physics
A 5.00 kg carrying a charge of Q=60 uC is connected to a spring for which k=100N/m. The block lies on a frictionless horizontal track and the system is immersed in a uniform electric field of E=5.0e5 V/m. If the block is released from rest when the spring is unstretched. A) By...
Wednesday, March 28, 2012 at 9:04pm

statistics
Your customer is using a 620R to deliver fluid to a 25 liter bottle. He calls you and says the delivery rate has a lot of pulsation at the delivery pressure he is operating. If the bottles are not seated exactly in the holder, which happens often the first pulse of fluid from ...
Wednesday, March 28, 2012 at 8:01pm

chemistry
For the system H2(g) + CO2(g) <---> H2O(g) + CO(g) at equilibrium, the addition of H2(g) would cause (according to LeChatelier’s principle) 1. more H2O(g) and CO(g) to form. 2. only more CO2(g) to form. 3. only more H2O(g) to form. 4. no change in amounts of ...
Wednesday, March 28, 2012 at 6:44pm

Physics
Two electrons are fixed 2cm apart. Another electron is shot from infinity and comes to rest midway between the two fixed electrons. A)Find the energy of the system initially( unknown quantity leave as a variable) B) Find the final energy of the system?( unknown quantity leave ...
Wednesday, March 28, 2012 at 6:01pm

Psychology
Your brain has instructed your muscles to move so an oncoming vehicle. What division of your nervous system carried the information to your muscles? Answer A. sympathetic nervous system B. somatic nervous system C. autonomic nervous system D. parasympathetic nervous system
Wednesday, March 28, 2012 at 5:18pm

physics
A block of mass m = 3 kg is attached to a spring (k = 28 N/m) by a rope that hangs over a pulley of mass M = 7 kg and radius R = 6 cm, as shown in the figure. Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley, and assuming the ...
Wednesday, March 28, 2012 at 2:50pm

physics
A mass of 0.7 kg is attached to the end of a massless spring of spring constant 0.35 N/m. It is released from rest from an extended position. After 0.8 s, the speed of the mass is measured to be 1.5 m/s. What is the amplitude of oscillation? What is the total energy (relative ...
Wednesday, March 28, 2012 at 1:05pm

Chemistry
For a system where: NH2OH + CH3NH3+ --> CH3NH2 + NH3OH+ 95% 95% 5% 5% State of equilibrium in the system is described by the percentages given above.Which of the species above is the strongest acid in the system? My answer is CH3NH3+, is it correct?
Wednesday, March 28, 2012 at 12:23pm

Pre Algebra
equations of the system Ax-4y=9, 4x+By=-1 explain how to find the values of A and B,then find these values
Wednesday, March 28, 2012 at 1:32am

Microbiology
Why can Enterotube II System be used to identify only gram-ngative, oxidase negative Enterobacteriaceae?
Wednesday, March 28, 2012 at 12:09am

macroeconomics
If the economy currently has a frictional unemployment rate of 2 percent, structural unemployment of 2 percent, seasonal unemployment of 0.5 percent, and cyclical unemployment of 2 percent, what is the natural rate of unemployment? Where is the economy operating relative to ...
Tuesday, March 27, 2012 at 10:44pm

accounting
Bulldog Appliances uses the periodic inventory system. Details regarding the inventory of appliances at September 1, 2011, purchases invoices during the next 12 months, and the inventory count at August 31, 2012, are summarized as follows
Tuesday, March 27, 2012 at 9:50pm

math
Complete in Metric Conversions: A drainage system for a 40 acre field is designed to remove 3/8 inch of standing water from the entire field in 24 hours. What flow rate (gpm) must the drainage system achieve to meet the design specification? (283 gpm)
Tuesday, March 27, 2012 at 9:31pm

math
Complete in Metric Conversions: What is the tip speed (ft/min) of a 21 inch long rotary lawn mower blade that is connected to the output shaft of an engine operating at 3400 rpm?
Tuesday, March 27, 2012 at 9:28pm

APUSH
Please check? 1. a 2.c 3. e 4. b 1. Before the civil war the south's slave labor force a. was a self reproducing population b. was generally unprofitable to the planter class c. was an inflexible labor system d. was employed exclusively in the cultivation of cotton e. was ...
Tuesday, March 27, 2012 at 8:55pm

criminal justice
Which of the following is an ethical system that does not support using the individual as a means to an end
Tuesday, March 27, 2012 at 8:15pm

Physics
A block of mass m = 3 kg is attached to a spring (k = 28 N/m) by a rope that hangs over a pulley of mass M = 7 kg and radius R = 6 cm, as shown in the figure. Treating the pulley as a solid homogeneous disk, neglecting friction at the axle of the pulley, and assuming the ...
Tuesday, March 27, 2012 at 5:23pm

programming
1.which of the following statements allows many branches or alternatives paths? A.IF-THEN; B.ON-GOTO; C. GOTO; D. all of the above. 2.The system command ---- is used to tell the computer to execute the program A.LIST B.EXECUTE C.END D.RUN 3. -----notation is used for ...
Tuesday, March 27, 2012 at 4:59pm

Intermediate Algebra
Solve using the elimination method.Show work.If system has no solution state this or infinite solution 8x+10y=-34 16x-5y=-43
Tuesday, March 27, 2012 at 1:01am

chemistry
Consider the reaction at equilibrium: CaO(s) + CO2(g) ! CaCO3(s) If you add more CaO to the system, how will the system respond?
Monday, March 26, 2012 at 8:01pm

chemistry
51.59 g of water at 82.6 oC is added to a calorimeter that contains 48.01 g of water at 40.9 oC. If the final temperature of the system is 59.4 oC, what is the calorimeter constant (Ccalorimeter) ? Use 4.184 J/goC for the heat capacity of water.
Monday, March 26, 2012 at 4:07pm

Leadership
As F. Nicholas Jacobs toured the Windber Medical Center facility, he was dismayed by the industrial pink painted walls, the circa 1970 furniture, and the snow leaking through the windows of the conference room. Employees earned 30 percent less than their counterparts in the ...
Monday, March 26, 2012 at 1:35pm

Physics. PLEASE HELP!!
NOTE: 1 MJ = 106J. One of the most powerful cranes in the world, operating in Switzerland, can slowly raise a load of 6000 tonne to a height of 8 m. (1 tonne = 1000 kg) The acceleration of gravity is 9.81 m/s2 . How much work is done by the crane? Answer in units of MJ
Monday, March 26, 2012 at 1:22pm

Physics-Thermo
Imagine a 600 g of water at 70oC in a piston-cylinder device. Initially, the 9-kg, 13-cm diameter piston rests on two stops such that the water occupies a volume of 0.2 m3. Heat is transferred to the system until the water is completely vaporized. Take the atmospheric pressure...
Monday, March 26, 2012 at 9:54am

Chemistry
500.0 mL of 0.220 mol/L HCl(aq) was added to a high quality insulated calorimeter containing 500.0mL of 0.200 mol/L NaOH(aq).Both solutions had a density of 1g/mL & a specific heat of 4.184 J/g.K.The calorimeter had a heat capacity of 850 J/C.Temperature of entire system rose ...
Monday, March 26, 2012 at 8:58am

AIU
You are the lead human–computer interaction (HCI) engineer on a major defense project supporting the government and its integration of a new system and application design for use by federal investigators. Part of your job is to elicit and define the user interface ...
Sunday, March 25, 2012 at 10:23pm

human behavior at work
both philosophy and visions are somewhat hazy concepts.How can they be made clear to employees?why are philosophy and vision included as early elements in the organizational behavior system?give an example of an organizational vision that you have read about or heard of.
Sunday, March 25, 2012 at 9:52pm

pharmacology
which is the least accurate system for measuring medicine?
Sunday, March 25, 2012 at 8:21pm

Algebra
Josh and Racquel sold cookies and brownies at the math club bake sale. The cookies cost $0.47 each, and the brownies cost $0.60 each. They sold a total of 603 items (cookies and brownies) and raised $323.84 Write a system of equations and determine the number of cookies sold ...
Sunday, March 25, 2012 at 7:15pm

Algebra
A movie theater manager wants to know how many adults and how many children pay admission to a particular movie. The theater charges $10.00 for adult tickets and $5.00 for child tickets. At a showing where 210 tickets were sold the theater collected $1,355.00. Write a system ...
Sunday, March 25, 2012 at 7:15pm

Algebra
Solve the system of equations by substitution. Your answer should be given as an ordered pair like this (x, y). Round your answers to the nearest tenth. y=-2+7x 10x-7y=209
Sunday, March 25, 2012 at 7:13pm

Chemistry
The following system is at equilibrium,at 699K in a 5L container. H2(g)+I2(g)--->2HI(g) Kc = 54.9 Initially,the system had 2.50 moles of HI.What is the moles of H2 at equilibrium? Can Dr.Bob check if my steps are correct? My solution: Initially,the concentrations of H2 & I2...
Sunday, March 25, 2012 at 3:11am

math 125
solve the system 2x-3y-z=-8 x-y--z=-2 -4x+3y+z=6
Saturday, March 24, 2012 at 12:36am

English
I left out these sentences. Thank you very much. I really need your revision. Thank you very much. 1) His last voyage leads him to the island inhabited by the Houyhnhnms, horses endowed with reason that rule over the ....., a vile and filthy species of animals similar to human...
Friday, March 23, 2012 at 7:02pm

English
I urgently need you to revise this paragraph I need to prepare on Gulliver's travels. Thank you 1) Gulliver’s Travels, which can be regarded as Swift’s masterpiece, consists of four books, each dealing with the various adventures of the ship’s surgeon Lemuel...
Friday, March 23, 2012 at 6:54pm

Geography
Can someone check these for me? 1.What problem has been at the heart of the intense political struggles in Central America? Unequal distribution of usable land is the heart of the political struggle. There is a shortage of farmland in order to meet the needs of everyone. ...
Friday, March 23, 2012 at 12:36pm

pol science
Locate indiana stateÂ’s constitution and examine the major elements and articles of the constitution. Review its contents and functions. Search for information about the judicial, educational, and social service systems offered in indiana state and the funding ...
Friday, March 23, 2012 at 12:14pm

physics
A 7000-kg freight car rolls along rails with negligible friction. The car is brought to rest by a combination of two coiled springs as illustrated in the figure below. Both springs are described by Hooke's law and have spring constants with k1 = 1700 N/m and k2 = 3800 N/m...
Friday, March 23, 2012 at 10:19am

Chemistry
500.0mL of 0.220 mol/L HCl(aq) was added to a high quality insulated calorimeter containing 500.0mL of 0.200mol/L NaOH(aq).Both solutions had a density of 1.000g/mL & a specific heat of 4.184 J/g.K. The calorimeter had a heat capacity of 850.0 J/degree C. The temperature of ...
Friday, March 23, 2012 at 8:33am

English
I have to write an english assignment about banning a reality tv show. One of the paragraphs has to be about how 1984 underpins the whole concept of the show. I chose (Next Top Model). I have found a lot of links like unacceptable standards of beauty, manipulation of the ...
Friday, March 23, 2012 at 12:09am

Embedde System and IC Design.
Write a program that will count down from the last (4) digits of the student ID 1119939 until zero. Once completed, the function will reset and count down again. Assume the last two (2) digits of the student ID is a decimal number, and crystal oscillator is 11.0592MHz.
Thursday, March 22, 2012 at 9:37pm

Embedded System and IC Design.
Write a program, which writes the last two (2) digits of the student ID 1119939 into the 8051 microcontroller’s internal RAM addresses from 40h to 6Fh with the same data. Assume the last two (2) digits of the Stamford student ID(1119939) is a decimal number, and crystal ...
Thursday, March 22, 2012 at 9:36pm

Science
What type of signal is measured in a sonar system to determine the depth of the ocean? A. absorption of sound waves by underwater features B. reflection of sound waves by underwater features C. absorption of electromagnet waves by underwater features D. reflection of ...
Thursday, March 22, 2012 at 8:21pm

Algebra
Solve using the elimination method.Show work.If the system has no solution or an infinite number of solution state ths...-5x+4y=-16,-15x+2y=-58
Thursday, March 22, 2012 at 1:16pm

Algebra
Solve using the elimination method.Show work.If the system has no solution or an infinite number of solutions state this. 7x+8y=51,7x+10y=55
Thursday, March 22, 2012 at 1:13pm

Algebra
The point (6,2) lies on the line -x-8y=-22. Determine if this point is a solution of the system. -x-8y=-22,-7x+3y=-36
Thursday, March 22, 2012 at 1:11pm

Algebra
Determine whether the point(7,2) is a solution of the system..-3x+4y=-13,-2x+8y=2,by substituting the point into each equation.
Thursday, March 22, 2012 at 1:09pm

physics
A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 7.0 m/s at the end of 5.0 s. At that instant, the kinetic energy of the system is 100 J and each mass has moved a distance of 17.5 m. Determine the values of m1 and m2.
Wednesday, March 21, 2012 at 7:57pm

algebra
When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent?
Wednesday, March 21, 2012 at 12:27pm

algebra
Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations.
Wednesday, March 21, 2012 at 12:26pm

physics
In figure p4.36, m1 = 10kg and m2 = 4.0kg. the coefficient of static friction between m1 and the horizontal surface is 0.50, and the coefficient of kinetic friction is 0.30. (a) if the system is released from rest, what will its acceleration be? (b) if the system is set in ...
Wednesday, March 21, 2012 at 11:59am

statistics
Late payment of medical claims can add to the cost of health care. An article (M. Freudenheim, "The Check Is Not in the Mail," The New York Times, May 25, 2006, pp. C1, C6) reported that for one insurance company, 85.1% of the claims were paid in full when first ...
Wednesday, March 21, 2012 at 11:32am

Managerial Economics
The demand for health club services is Q = 350 − 2P and the marginal cost of providing these services is MC = 110 + 2Q. If a two-part tariff pricing system is used, what is the optimal price and quantity combination? a.P = 52 and Q = 240 b.P = 199 and Q = 52 c.P = 26 ...
Tuesday, March 20, 2012 at 10:59pm

AP CHEMISTRY
Consider the reaction. PbCO3(s)<--> PbO(s) + CO2(g). calculate the equilibrium pressure of CO2 in the system at the following temperatures.(IN atm) (a) 270°C (b) 480°C ..... delta Hf(KJ/mol).. d.Gf(KJ/mol).. S(J/mol-K) PbCO3(s)..-699.1 .. -625.5 .. 131.0 PbO(s...
Tuesday, March 20, 2012 at 4:06pm

Chemistry
What is the equilibrium equations that result when solid NH4F is dissolved in sufficient water to produce 5.0 mL of 0.5M NH4F solution? How would the addition of 5 drops of 0.1M HCl affect the equilibrium system. Give an explanation. How would the addition of 5 drops of NaOH ...
Tuesday, March 20, 2012 at 2:52pm

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