# Homework Help: Computers: Operating Systems

## Recent Homework Questions About Operating Systems

math
Q1. Determine the value of k for which the given system of equations has unique solution: a) 2x – 3y = 1 ; k x + 5y = 7 b) 4x – 5y = k ; 2x – 3 y = 12

science
what volume of hydrogen peroxide needs to added to treat the system at 100ppm. available hydrogen peroxide is 35%

Algebra
How many solutions as a system of equations have? 2X= -10y + 6 & x+5y=3

math
a + bc = -1 b + ac = -1 c + ab = -1 Which of these values of 'a' is one solution for this system of equations? A) -2 B) -1 C) 0 D) 2 Please also explain how you got the answer, thanks.

physics
Given the system shown, consider all surfaces frictionless. If m=0.5kg is released when it is 1.6 m above the base of M=0.3kg, how long after release will m strike the base ?

Economics(help!)
Suppose you are the manager of a watch-making firm operating in a comptetive market.You cost of production is given by C=100+Q^2,Where Q is the level of output and C is total cost. a)If the price of watches is birr 60,how many watches should you produce to maximize profit? b)...

Thermodynamics
400 g of water are emptied at 20 ° C in a vessel. The container is placed at Fire of a flame that gives it a certain amount of thermal energy of So that it takes 5 minutes for the water to reach a temperature of 90 ° C. If the vessel does not absorb thermal energy, a) how ...

physics
Two boxes are connected by a cord running over a pulley. Box A is on a table and Box B is hanging off of the pulley. The system is released from rest and Box B drops a distance D. What is the word done by gravity on box B?

Chemistry-titrations
When an acid is titrated with a Carbonate, do we have to heat the system when Hph is the indicator? If so what is the reason?

Math
What are the solutions of the system? y=x^2+3x-4 y=2x+2 a) (-3,6) and (2,-4)** b) (-3,-4) and (2,6) c) (-3,-4) and (-2,-2) d) no solutions

Java programming
Hi, I'm trying to figure out how to implement toString() methods into the JavaTest and H2ClassB classes so that the output would be 4 3 7 5 99 3: import java.util.ArrayList; public class JavaTest { ArrayList <JavaTest> list = new ArrayList <JavaTest> (); public ...

Strictly speaking, NO system can be completely closed - for example, hot liquid in the best thermos eventually cools down - but for most purposes a system can effectively be “closed”. How would you create a system which is more or less closed with respect to: a) Heat loss...

Chemistry
Strictly speaking, NO system can be completely closed - for example, hot liquid in the best thermos eventually cools down - but for most purposes a system can effectively be “closed”. How would you create a system which is more or less closed with respect to: a) Heat loss...

Chemistry
Question: At 300 K,Carbon powder and O2 are included in container of 10dm3.When the system is heated well,all the O2 converts into CO2.Then the system is cooled to the initial temperature. The volume of the Carbon powder is negligible. Find the percentage of the increasement ...

Math
Consider the system of equations y= -x^2+9 y=3/x Find the solution of the system to four demimal places

After defining the scope of the system, the next step is to: a) conduct a feasibilty study. b) determine requirements. c) form the project team?

Algebra
1. The length of a rectangle is twice its width. The perimeter of the rectangle is 24 inches. Write a system of equations in 2 variables. Use substitution to solve the problem. A. Equation 1: L = 2W L= 2(4) = 8 Equation 2: 2L + 2W = 24 2(2W) + 2W = 24 6W = 24 W = 24/6 = 4 (i ...

Algebra
1. The length of a rectangle is twice its width. The perimeter of the rectangle is 24 inches. Write a system of equations in 2 variables. Use substitution to solve the problem. A. Equation 1: Equation 2: _________________________________ B. What is the area of the rectangle?

Physics
1.A student repeatedly measured the length of a simple pendulum and recorded the results in centimetre as: 36.9, 36.7, 36.8 and 36.6. What is the precision index of this measurement in cm? 0.108 36.75 0.054 0.0269 2 How would the final result of the repeated measurement of the...

math
Solve the system:4x+2y-13=0 and 3x=5y+26 by elimination. 3 (4x+2y-13=0) 12x+6y-26=0 4 (3x=5y+26) 12x=20y+104 I need to subtract since the signs are the same: 12x+6y-26=0 Since they don't match up, I'm having trouble subtracting them. I'm not sure what to do next. Please help??

Math
Which best describes a system of equations that has infinitely many solutions? consistent, independent inconsistent, dependent consistent, dependent inconsistent How many solutions does this system have? y = x + 5 y = -5x - 1 one none infinite two

Social Studies
In the opinion of the company accountant, the managers completely failed to understand what was really going on: a little-known phenomenon known as the Hawthorne effect. According to the Hawthorne effect, when you introduce an innovation is new. Managers try harder because ...

Algebra
Student tickets to the Homecoming game cost \$5 each. General admission tickets cost \$8 each. So far, 150 tickets have been sold. \$900 has been collected. A. Write a system of equations for this model in standard form. 5S = Student tickets: 100 sold 8G = General Admissions: 50 ...

Algebra
Student tickets to the Homecoming game cost \$5 each. General admission tickets cost \$8 each. So far, 150 tickets have been sold. \$900 has been collected. A. Write a system of equations for this model in standard form. 8G = General Admissions: 50 sold 5S = Student tickets: 100 ...

Math
Student tickets to the Homecoming game cost \$5 each. General admission tickets cost \$8 each. So far, 150 tickets have been sold. \$900 has been collected. A. Write a system of equations for this model in standard form. B. Graph the system. ( let each square represents 20 units...

maths
Solve the following system of linear equations using matrix method. i)2x+y-2z=10 y+10z=-28 3y+16z=-42

Thermochemistry
A piece of tin is heated to 695 °C and dropped into 158 g of water at 23.2 °C. The temperature of the system rises to 30.7 °C. What is the mass of the tin dropped into the water? (C = 0.227 J/g°C for tin, C = 4.18 J/g°C for water)

Thermochemistry
A piece of tin is heated to 695 °C and dropped into 158 g of water at 23.2 °C. The temperature of the system rises to 30.7 °C. What is the mass of the tin dropped into the water? (C = 0.227 J/g°C for tin, C = 4.18 J/g°C for water)

politics
Which of the following is provided through the mechanics of pluralism, according to Robert Dahl? A. Elites can manipulate mass opinion. B. Aspiring leaders can distribute resources to gain influence. C. Aspiring leaders are limited in the ability to control the political ...

politics
Which system would work best to provide a new political party a voice in legislative deliberations? A. Ballot initiatives B. Single-member districts C. Proportional representation D. Direct democracy a?

math
What would you need to multiply by in order to solve this system of equations using the linear combination (elimination) method? {6x−2y=4 7x+5y=3 Multiply the 1st equation by 3 and leave the 2nd equation alone. This will eliminate the y's when you add the two new equations ...

Math
Which properties justify the steps taken to solve the system? {4x+3y=25 {2x+−5y=19 Drag the answers into the boxes to match each step. 4x+3y=25; −4x+10y=−38 ________________ 13y=−13 _________ y=−1 ____________ 4x+3(−1)=25 _________ 4x−3=25 _______ 4x = 28 ...

politics
The civil-service system arose in the late 19th century as a response to: A. the problems created by a small bureaucracy. B. the problem of states having too much public responsibility. C. the challenge of managing a growing rural economy. D. the corruption and abuses of the ...

politics
Which of the following statements is NOT accurate? A. The seniority system favors members from one-party regions. B. The seniority system is often attacked as being undemocratic. C. Seniority is an unwritten rule, which is generally followed when appointing committee chairs. D...

Social studies-Unit 6 :building on Economics Basic
2. What is one source of revenue for the federal government to pay for public goods and services? A - property taxes B- sales taxes C- income taxes D- excise taxes I think it's c ! 3. What is one the things the federal reserve system does? A- set income tax rates at the ...

Math
What are the major advantages of a place value system over a non-place value system of numeration?

Civics
Lord Acton, a British historian, was famous for saying, "All power corrupts. Absolute power corrupts absolutely." He believed that any individual or group having too much power was a bad thing. With which statement regarding systems of government would Lord Acton most likely ...

Maths / Physics (uni level)
Say I have a centre of rotation at C(x, y, 1 <= z <= 1.5). I need to define a unit normal vector to this. I know it's a length of 1 and this means there's a sphere of radius 1 at the origin so I can get the beginnings of a spherical coordinate system, but I'm a little ...

accounting
The following are the transaction of s company will in branch for 2(two) year they follow periodic inventory system. 1. Beginning inventory balance with in birr 10000 2. S company shipped merchandise is birr costing 80000 cash 20000 3. Birr sold merchandise costing 60000 for ...

Health
15. Strong social bonds and a good support system can block the negative effects of stress in your life. Which factor can be a poor choice for blocking the negative influences? (1 point) A.associating with peers who are drug free B.having friends who are supportive and ...

Physics!
At a steam power plant, steam engines work in pairs, the output of heat from one being the approximate heat input of the second. The operating temperatures of the first are 520°C and 320°C, and of the second 310°C and 170°C. If the heat of combustion of coal is 2.8x107 J/...

ss
In what way is the government of the United Kingdom similar to that of the United States? A) Both have a head of government that is a member of the legislative branch. B) Neither government has a formal set of written laws as a framework. C) Both have seen their powers ...

social studies- helpppp
France and Britain were able to avoid the worst of the Great Depression because A) their colonies were required to purchase goods from them.**** B) neither had any significant involvement in international trade. C) the Great Depression affected only the United States, not ...

ss
Europeans began to settle in Latin America in the 1500s. Many of these settlers married Native Americans. The children of mixed European and Native American ancestry were called mestizos. . Mestizos became a new A) peer group. B) ethnic group.*** C) family group. D) political...

math
You play racquetball at a community club. You have two options for paying for court time. Option A: You pay \$12 for court time each time you play. Option B: You buy a club membership for \$120 and then pay \$2 each time you play. a. Write and solve a linear system to determine ...

math
A boat travels from one port A to port B, travelling 126 km, upstream (against the current) at a uniform speed, and the trip takes 6 hours.  On the way back (downstream), the trip only takes 4.5 hours. Set up and solve a system of equations to find out the speed of the boat ...

Algebra
How many solutions does the system of equations have? 3x+12y=20 y=-1/4x+5/3 A) one C) infinitely many B) two D) none

scence
he movement of matter through the biosphere is different from the flow of energy in that particulart area which It is cycled through. Generally, the biosphere is a closed system, so matter remains fairly constant. Energy on the other hand, it enters and leaves the system ...

Science
How do global positioning systems use elevation points on Earths system to find latitude and longitude A. By using signals from a network of satellite B. By using topographic maps C. By using satellite images D. By using photography

Science
Do global positioning systems use elevation on Earths system to find latitude and longitude A. By using signals from a network of satellite B. By using topographic maps C. By using satellite images D. By using photography

biology
describe the pathway of blood through the prts of the earthworms circulatory system

American Government
What is the role of the Securities and Exchange Commission (SEC)? How does it influence the economy? Explain the difference between capitalism and communism. What role does the government play in each type of economic system?

Science
What is an example of a stable system? How were you able to determine whether or not this system is stable?

PHYSICS
A 5 kg block rests on a frictionless horizontal surface. A cord attached to the block passes over the pulley whose diameter is 0.120 m to the hanging block of mass 5 kg. The system is released from rest and the blocks are observed to move 3m in 2.0 s. A. What is the tension in...

PHYSICS, help!
A 5 kg block rests on a frictionless horizontal surface. A cord attached to the block passes over the pulley whose diameter is 0.120 m to the hanging block of mass 5 kg. The system is released from rest and the blocks are observed to move 3m in 2.0 s. A. What is the tension in...

Science
Jupiter, Saturn, Uranus, and Neptune: what is one reason why life probably does not exist on these four planets? A) They have no gravity. B) They are the gas planets. C) They are the giant planets. **** D) They are the rocky planets. Earth seems to be the only planet in our ...

Algebra
5) How many solutions does the system of equations have?x-4y=12 and 5x-20y=60 A.one B.two C.infinitely many D.none 6) How many solutions does the system of equations have? y-6x=-3 and 4y-24x=-16 A.one B.two C.infinitely many D.none

Algebra
How many solutions does the system of equations have? y=6x+2 and 3y-18x=12 A. one B. two C. infinitely many D. none

Algebra
How many solutions does the system of equations have? x=-4y+4 and 2x+8y=8 A. one B. two C. infinitely many D. none

science help only have 3 min left
Earth seems to be the only planet in our solar system that can support life. All BUT ONE of these is a reason why life is found only on Earth. That is A) a moderate climate. Reactivate B) the presence of water on Earth. C) it is the perfect distance from the sun. D) it has ...

Planets
Jupiter, Saturn, Uranus, and Neptune: what is one reason why life probably does not exist on these four planets? A) They have no gravity. B) They are the gas planets. C) They are the giant planets. **** D) They are the rocky planets. Earth seems to be the only planet in our ...

Science
A hurricane becomes more powerful be evaporating water from? lakes mountains oceans*** rivers 1. Over time, scientists have changed their model of our solar system. It has transitioned from A) a sun-centered to an moon-centered model. B) a sun-centered to an earth-centered ...

social studies
Can you please tell me that how to write an acknowledgement for any geography project . Topic: SOLAR SYSTEM - FOR 8TH STANDARD

Science
How much effort force would you have to use to lift a 800 newton load using a pulley system with a mechanical advantage of 4?

History ASAP
ASAP please and thank you! Explain the difference between capitalism and communism. what role does the government play in each type of economic system?

Math
Please help with these 3 questions. 1. Suppose that y varies inversely with x, and y=3, when x=5. What is an equation fpr the inverse variation. 2. What are the solutions to the system? y=x^2+2x-45 y=-3x+5 3. -sqrt 18 divided by sqrt 12 Thank you!

Physics
10gm of steam 100°c are blown on the surface of 90gm water at 0°c contained in a calorimeter of water 10gm.all steams are condensed .calculate the increase in entropy of the system

math
The difference between two numbers is 3. Eight times the larger number is 10 times the smaller number. Write a system of equations describing the given conditions. Then solve the system by the substitution method and find the two numbers.

Science
The u.s. constitution provides that each of the three branches of the federal government has certain powers that can limit the powers of the other branches. These limitations are known as the system of checks and balances. Which of the following actions is a check by the ...

The Citizens of a small city have been eager to see more green space in their environment. There are several abandoned lots that activists think could be turned into community gardens or parks for people to freely enjoy 1.for the additional green spaces to be considered public...

History
How did the geographic location of Philadelphia affect the city's development? Because of its location on rivers, the city built bridges and used ferries to allow workers to access the city.*** Because of proximity to water, streets had to be properly elevated to avoid ...

Physics
a charge q1=5.00nc is placed at the origin of an xy-coordinate system ,and a charge q2=-2.00nc is placed on the positive x-axis at x=4.00cm (a.) if a third charge q3=6.00nc is now placed at the point x=4cm, y=3.00cm. find the x and y components of the total force exerted on ...

You have an LED bulb that uses 4 watts of power and gives an output of 170 lumens. The operating voltage is 120 volts. Using this data, find the following. 1. What is the current that the LED bulb uses? Ans. 0.03 ampere 2. What is the effective resistance of this bulb? I'm not...

kenson r
550 g of water (cw = 4186 J/kg.K) at 75°C is poured into an 855 g aluminum (cw =900 J/kg.K) container with an initial temperature of 11°C. What is the final temperature of the system, assuming no heat is exchanged with the surroundings?

Physics
For a I got 36666.67 seconds which I don't know if its right and then b I know my answer is wrong because I got 0.0375 for wavelength.And I don't understand how to do e or f.   The Voyager 1 spacecraft is at the edge of the solar system, about 11 billion km away. (a) How ...

Physics
The Voyager 1 spacecraft is at the edge of the solar system, about 11 billion km away. (a) How long does a radio signal from Voyager 1 take to get to the Earth? (b) Its radio works at 8 GHz. What is the wavelength? (c) What type of light is this? (d) What is the energy of...

science
A lab technician adds 0.035 mol of KCl to 1.00 L of 0.0050 M Pb(NO3)2. Ksp = 1.7 × 10–5 for PbCl2. Which of the following statements is correct? a) Lead chloride precipitates until the solution is saturated. b) The solution is unsaturated and no precipitate forms. c) The ...

The citizens of a small city have been eager to see more green space in their environment. There are several abandoned lots that activists think could be turned into community gardens or parks for people to freely enjoy. Use the passage to answer the question. 1. For the ...

Social studies
What is one of the things the federales reserve system does? Set income tax rate at the federal level Influence interest rates•• Decided who can open bank account Give loans to bank customers How might the government deal with a huge company that has no competitors and is ...

Algebra
The Bradys and their maid, Alice, took a trip to Hawaii for their summer vacation. The travel agent told Ike that the trip would cost \$210 for each child plus another \$315 per adult. According to the credit card receipt the trip cost a total of \$2205 for all 9 of them. Find ...

Physics
A 1000 kg rocket without an internal propulsion system is launched with an initial speed of 7.00 x 102 m/s. Determine the maximum height attained by the rocket.

Texas History
Can someone on connexus help me with this test? 1.What was a big difference between the Texas constitution of 1836 and the Texas Constitution of 1845? A.The constitution of 1845 did not have a separation of powers like that of the constitution of 1836. B.The constitution of ...

Algebra
Which of the following ordered pairs represents the solution to the system given below? 2x + y = 20 4x − 2y = 40 A. (10, 0)***** B. (0, 10) C.(4, 2) D. (10, −10) Check my work please!

math
Marvin has a box containing apples and oranges. *There are a total of 100 apples and oranges in the box. *The number of apples in the box is 16 more than the number of oranges How many apples are in the same box? Answer: Its a system of equation so a+o=100 a=o+16 Distribute o+...

Trig
A conveyor is used to lift paper to a shredder. The most efficient operating angle of elevation for the conveyor is 35.2°. The paper is to be elevated 16.0 m. What length of conveyor is needed?

Physics
The spring of force constant k = 400 N/m is set up horizontally with a 0.300 kg mass attached on it resting on a frictionless table. The mass is pulled so that the spring is stretched 0.100 m from the equilibrium point, and is then released from rest. Determine the speed of ...

Operating systems
Is there a Windows 3.5?

1. What is an example of a stable system?

College Alebra
Solve the following using system of equations. The sum of three numbers is 26. The middle number numerically is one more than three times the smallest number. The largest number is two times less than five times the smallest number. Find the three numbers.

Pre-Algebra
Here's the instructions for my portfolio: 1. Choose two animals with different speeds. You can choose fro m the chart that starts at the bottom of this page or do research to choose your own. 2. Design a fair race in which the two animals have an equal chance of winning if ...

Chemistry
A system has an initial energy of 117 joules. The energy equation includes --40.1 J of heat and -20.3 J of work. What is the final energy? Was heat added to the system or to the environment? Was work done by the system or to the system? Be sure to show all of your work and ...

Math
1.How many solutions does the system of equations have? y=6x+2 y=6x+4 a. one b. two c. infinite d. none 2. How many solutions does the system of equations have? y=1/2x-3 x-2y=6 a. one b. two c. infinitely many d. none 3. How many solutions does the system of equations have? y-...

jnbjln
What is the pH of 1.00 L of the 0.100 M hydrofluoric acid/0.120 M fluoride ion buffer system from the previous problem after 0.020 mol of NaOH is added?

Health pe
The peripheral nervous system (select all that apply) . Is made up of the brain and spinal cord. . Links the body to the brain and spinal cord *** .is made up of sensory and motor neurons **** . Is responsible for thought and reason

Algebra 1
How many solutions does this system have? y=x+5 y=−5x−1 A. One B. None C. Infinite D. Two** Which best describes a system of equations that has infinitely many solutions? A. Consistent, independent B. Inconsistent, dependent C. Consistent, dependent D. Inconsistent** I'm ...

Physic sucks 1401
An Atwood's machine is built from m1=1kg and m2=2kg. The massless string is passed over a frictionless massless pulley. When the system is released from rest, what is the tension in the string? The answer is 68, this is for my finals review And my professor said the questions ...

physics
a block and tackle with a velocity ratio f 5 is used to raise a mass of 25kg through a vertical distance of 40cm at a steady rate.if the effort is equal to 60N .Determine 1.)the distance moved by he effort 2.)the work done by the effort in lifting the load 3.)the loss in ...

science
Of the following, which is NOT an adaptation made by reptiles to life on land? thick, dry, water-proof skin exchange oxygen and carbon dioxide in lungs only eggs with leathery shells open circulatory system I think its either C or B

Social Studies
which of the following is the best description of a reason the Soviet Union collapsed ? A) Development of the Strategic Defense Initiative * B) The stars wars defense system was successful C) Gorbachev allowed political parties other than his own D) A civil war broke out in ...

Precalculus -- Systems of Equations
I do not understand this problem. This is part of the question, but I think if I get this part, I'll get the rest. Determine the value(s) of r for which the system: (x^2)+(y^2)=(r^2) x-2y=8 has one real solution. I can't get anywhere! We should solve algebraically...

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