Thursday
May 28, 2015

Homework Help: Computers: Operating Systems

Recent Homework Questions About Operating Systems

Math
Jesse and Leah can install a new gutter system on a house in 4 hours when they work together. Working alone, it would take Leah twice as long to install a new gutter system as it would take Jesse working by himself. Leah caught a really bad cold and called in sick this morning...
Tuesday, May 26, 2015 at 11:55pm

Chemistry
You are given 75mL of 1mol/L NaOH and 75 mL of 1mol/L HNO3 at atmospheric pressure. After mixing the two compounds, he measured a rise in temperature from 25°C to 32°C. Find the change in energy of the system in kJ/mol. (Known: Density of aqueous solution is 1.00g/mL ...
Tuesday, May 26, 2015 at 12:07am

Algebra 1
What are the solutions to the system? y=x^2+5x-9 y+2x+1
Monday, May 25, 2015 at 12:36pm

Math Thanks
2 Eight children from the Schickel family are combining their savings to purchase a gaming system to connect to and play on their television. The gaming system is on sale at their favorite discount electronics store for 10 percent off of its regular price of $500. If the cost ...
Monday, May 25, 2015 at 12:27pm

Integers
Suppose Frontier City Amusement Park bought a ferris wheel for $92,000. 42,512 people paid $2.00 each to ride the ferris wheel the first year. Ignoring the cost of operating how much money did the park lose on the ferris wheel it first year.
Saturday, May 23, 2015 at 5:11pm

Intro. to Computers
The command prompt found on Windows 7 and Windows 8 is very similar to the interface of what past operating system?
Friday, May 22, 2015 at 12:31pm

Math
"A system of equations can have two answers beside an actual set of coordinates. What are they?" Would the two other answers be graphing and ratio, or ..
Thursday, May 21, 2015 at 4:50pm

Criminal Justice
According to the conflict perspective, conflicts between groups: A. can be avoided through the use of the legal system. B. are inevitable. C. cause power vacuums. D. can be changed though negotiation. is it B
Thursday, May 21, 2015 at 2:32pm

goverment help
How does voter turnout in the United States compare to voter turnout in other democracies? It is low. It is very high. It is above average. It is rather high. B What is the term for a ballot question that asks voters if they want to pass a special law directly? amendment bond ...
Thursday, May 21, 2015 at 1:45pm

goverment help
Which of the following is not a minor party in the history of the United States? Know-Nothing Free Soil Labour Socialist Which of the following is the most common party system in the world today? a group of people seeking to advance their ideas an independent agency pushing ...
Thursday, May 21, 2015 at 11:55am

Biology
What is the osmotic pressure of the salt solution in reverse-osmosis? Select one: a. An equilibrium state where the amount of solvent passing in opposite directions is equal b. An equilibrium state where the amount of solvent passing in one direction is greater than other ...
Thursday, May 21, 2015 at 12:56am

Managerial Economics
Soft selling occurs when a buyer is skeptical of the quality or usefulness of a product or service. For example, suppose you’re trying to sell a company a new accounting system that will reduce costs by 10%. Instead of asking for a price, you offer to give them the ...
Wednesday, May 20, 2015 at 5:36pm

science
1. How is an area’s topography determined? (1 point) A.by using an area’s longitude and latitude B.by using an area’s scale C.by using an area’s elevation, relief, and landforms*** D.by using an area’s elevation, longitude, and latitude 2. How do ...
Wednesday, May 20, 2015 at 3:45pm

a n p
RESPIRATORY CENTER OF THE NERVOS SYSTEM ? MEDULLA OBLONGATA CEREBELLIUM HYPOTHALAMUS HYPOCAMPUS i BELIEVE THAT IS MEDULLA OBLONGATA
Wednesday, May 20, 2015 at 11:09am

Business
the two aspects of an effective operating system are design and a. control b. implementation c. standardization d. ease to use. my ans. A. control am I correct help!! thanks
Tuesday, May 19, 2015 at 6:29pm

Science
1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength D.amplitude and frequency 2. ...
Tuesday, May 19, 2015 at 3:48pm

Science (Chemistry)
A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <---> 2H(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: (a) the reaction quotient intially (b) the order of concentration of...
Tuesday, May 19, 2015 at 10:16am

Science (Chemistry)
A chemical system within a sealed 1 L reaction vessel is described by the following reversible reaction equation: 2H2S(g) <---> 2H(g) + S2(g) If the equilibrium constant is 0.000 004 200 at 1103 K find: (a) the reaction quotient intially (b) the order of concentration of...
Monday, May 18, 2015 at 7:02pm

pleasse check social studies
Which governor took the actions below? regained accreditation for Georgia's universities led the way for 18-year-olds to have the right to vote established a board of corrections to oversee the prison system (1 point) Ellis Arnall Jimmy Carter Richard Russell *** Eugene ...
Monday, May 18, 2015 at 6:07pm

SOCIAL STDIES HELP!
Which governor took the actions below? regained accreditation for Georgia's universities led the way for 18-year-olds to have the right to vote established a board of corrections to oversee the prison system (1 point) Ellis Arnall Jimmy Carter Richard Russell Eugene ...
Monday, May 18, 2015 at 5:00pm

Calculus
Please check my answers. Solve the following equations and/or system of equations for the unknown variables. 1. x^2-3x-12=0 x= 3 + sqrt(57) / 2, x= 3 - sqrt(57) / 2 2. x+y=8 , 3x+2y=2 x=-14, y=22 3. 3x + 2y =10 , x+y=5 , y+z =9 x=0,y=5, z=4 4. 1/x-p1z=0, 1-p2z=0, I-p1x-p2y=0 ...
Monday, May 18, 2015 at 9:28am

American Goverment
In the American civil service system, workers are hired on the basis of (Points : 1) merit. partisan politics. loyalty. test taking ability.
Sunday, May 17, 2015 at 8:05pm

Social Studies
Describe the caste system and it’s the different levels.
Friday, May 15, 2015 at 6:47pm

Math
Hi! I know I am asking a lot since this is a huge question, but I was wondering if anyone could help or walk me through it. I totally understand if you do not want to help. But I am really confused and any help at all would be amazing. Thank you! You are writing an article on ...
Thursday, May 14, 2015 at 5:40pm

Please help
If there had not been a system of military alliances in place in Europe in 1914, would the assassination of Archduke Franz Ferdinand have resulted in World War I?
Wednesday, May 13, 2015 at 6:04pm

Science: Space
I'm having trouble finding the answers to these fill-in-the-blank questions: Our understanding of the solar system has changed from an Earth-centered model of ____ and ____ to the sun centered model of _____ and _____. I was thinking for the first 2 blanks: rocks; oxygen ...
Wednesday, May 13, 2015 at 5:09pm

science(check answers)
Which of the following is a correct description of a tornado A.a large swirling low pressure system that forms over that forms over the warm atlantic ocean B.A winter strom with wind speeds of at least 56 km/h and low visibility C. A violently rotating column of air in contact...
Tuesday, May 12, 2015 at 9:37am

chemistry
You are operating an X-ray tube with a molybdenum (Mo) target by applying an acceleration potential of 50 keV. Calculate the values of two characteristic wavelengths, λKα and λSWL. Express your answers in meters.
Sunday, May 10, 2015 at 11:22pm

American Goverment
Policy making in the United States is made through incrementalism because (Points : 1) the Constitution prohibits grand sweeping steps. the Madisonian system prevents grand sweeping action. incrementalism is more efficient. incrementalism produces the best possible policy
Saturday, May 9, 2015 at 11:43pm

Science
one year ago How many Global Positioning System (GPS) satellites are required to pinpoint your location on Earth’s surface? (1 point) 24 12 3 5 i think it's 4, but 4 is not an option
Saturday, May 9, 2015 at 9:48pm

data
Given the following business scenario, create a Crow’s Foot ERD using a specialization hierarchy if appropriate. Tiny Hospital keeps information on patients and hospital rooms. The system assigns each patient a patient ID number. In addition, the patient’s name and ...
Friday, May 8, 2015 at 5:34pm

Physics
A heat engine is 20% efficient. If it loses 800 J to the cooling system and exhaust during each cycle, the work done by the engine is: 200 J 1000 J 800 J 20 J
Friday, May 8, 2015 at 4:55pm

Physics
If ∆Q is the heat supplied to a gas so that the internal energy of the system increases by ∆U, then the work done ∆W by the gas is equal to: ∆Q – ∆U ∆Q + ∆U ∆Q x ∆U ∆U/∆Q
Friday, May 8, 2015 at 4:23pm

Science, check answers please
When a fan is turned on, it changes electrical energy into ____________ energy. -Motion** -Magnetic -Gravitational -Electromagnetic An experiment discovered that a particular material was a poor conductor of electricity. This material would most likely be used as a(n) -...
Friday, May 8, 2015 at 10:35am

Biochemistry
A gaseous system undergoes a change in temperature and volume. What is the entropy change for a particle in this system if the final number of microstates is 0.503 times that of the initial number of microstates?
Thursday, May 7, 2015 at 9:42am

chemistry
true or false Entropy always tend to favor mixing Mixing result in positive change in entropy Entropy allows endothermic processes to be spontaneous Pure liquids don't have entropy Addition of salt to water increases entropy Entropy is the measure of number of possible ...
Wednesday, May 6, 2015 at 11:53pm

Quant Reasoning
Stereo Inc. sells a stereo system for $300 down and monthly payments of $80 for the next 3 years. If the interest rate is 4.25% per year, find: a) The cost of the stereo. Answer = $ b) The total amount of interest paid. Answer = $
Wednesday, May 6, 2015 at 10:21pm

Science
Are these answers correct? 1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere**** Chromosphere Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar ...
Wednesday, May 6, 2015 at 1:27pm

Science
WHICH SYSTEM HAS THE GREATEST TIDAL EFFECT? EARTH-SUN OR EARTH-MOON?
Tuesday, May 5, 2015 at 7:27pm

Chemistry
Pt(s)| Fe^3+ (aq, .1M), Fe^2+ (aq, 1M)|| Fe^3+ (aq, ?M), Fe^2+ (aq, .001M)| Pt(s) A.) Write anode reaction B.) Write cathode reaction D.) If E= .14V for this cell, calculate conc. of Fe^3+ on the right half of the cell E.) What is the max amount of work this system can do when...
Tuesday, May 5, 2015 at 7:11pm

Chemistry
When Solid NaHCO3 was placed in a rigid container witha volume of 2.5L and heated to 160 degrees Celsius, the equilibrium was reached. 2 NaHCO3(s) -> Na2CO3 (s) + CO2(g) + H2O(g) At equilibrium, some of the starting material remains and the total pressure of the system is 7...
Tuesday, May 5, 2015 at 6:28pm

accounting
Explain how shaving 5% off the estimated direct labor hours in the base for the predetermined overhead rate usually results in a big boost in net operating income at the end of the fiscal year.
Monday, May 4, 2015 at 9:00pm

history
what was the main benefit of the factory system? a. it cut cost's and made workers more efficient b. it gave people their first chance too support themselves c. it reduced pollution caused by family-based power sources d. it increased the value of the workers and as a ...
Monday, May 4, 2015 at 4:57pm

science
In commercial/industrial life, most AC apparatus (e.g. lifts, lights, machinery, air conditioning, motors and so on) take more from the electricity supply source than they actually need. Power Factor Correction (PFC) is an energy saving technology that is used to improve the ...
Monday, May 4, 2015 at 9:59am

Chemistry
H2 (g)+I2 (g)↔2HI(g) Calculate ΔG for the system at 700 K when the concentrations are [H2] = 0.12M, [I2] = 0.27M, and [HI] = 0.118M. What would be my first step? If I make an ICE chart, what would I do from there? I just need the first step to help me out :( THANKS!
Saturday, May 2, 2015 at 8:00pm

engineering mechanics
The resultant if a certain system of forces has x and y components. Determine the components of this resultant with respect to N and T axes rotation 30 degree counterclockwise relative to the x and y axes. Ans. Rn= 500 lb Rt= 266 lb How did it happen?
Saturday, May 2, 2015 at 4:17am

Social studies
How did the Cold War affect South Carolina? A. Military bases were reopened or built in the state*** B. the Soviet Union became a trade partner C. Communism became a popular political system D. The state experienced an economic recession
Friday, May 1, 2015 at 7:23pm

P.E.
The peripheral nervous system (Select all that apply) Is made up of the brain and spinal cord Links the body to the brain Is made up of sensory and motor neurons*** Is responsible for thought and reasoning***
Friday, May 1, 2015 at 4:05pm

Social Studies
Which describes a belief of the progressive movement? (1 point) the belief that government could correct the ills of society the belief that individual citizens could work to improve social problems the belief that business and the free enterprise system could best improve ...
Thursday, April 30, 2015 at 8:38pm

math
What will the graph look like for a system of equations that has no solutions? A. The lines will be perpendicular. B. The lines cross at one point. C. Both equations will form the same line. D. The lines will be parallel. Is the answer B?? Thank you
Thursday, April 30, 2015 at 7:45pm

Science
Does the circulatory system make hormones, or merely distribute them after they are made in endocrine tissues?
Thursday, April 30, 2015 at 7:32pm

Social Studies
Because of her reform activities, which group would not have supported Rebecca Latimer Felton? (1 point) supporters of educational opportunities for all citizens of the state supporters of the suffrage movement to gain voting rights for women supporters of the convict lease ...
Thursday, April 30, 2015 at 4:57pm

Calculus
What is the solution to the following system of equations -2x+3y+z=5 x+5y+2z=17 To do this, I used elementary operations and isolated x to get 13y+5z=37. Is that correct so far? How would I continue?
Thursday, April 30, 2015 at 3:32pm

Career
1.)How people produce, distribute, and use goods and services? a.) Economy b.) Free enterprise system c.) Competition d.) Profit 2.)The amount of goods and services available for sale. a.) Producers b.) Consumers c.) Supply d.) Demand 3.)The amount of money left over after the...
Thursday, April 30, 2015 at 12:13pm

linear algebra
Suppose that we have a system consisting of two interconnected tanks, each containing a brine solution. Tank A contains x(t) pounds of salt in 200 gallons of brine, and tank B contains y(t) pounds of salt in 300 gallons of brine. The mixture in each tank is kept uniform by ...
Wednesday, April 29, 2015 at 7:48pm

physics
A 16lb block rests on a horizontal frictionless surface. A cord attached to the block, running horizontally, passes over a pulley whose diameter is 6in, to a hanging block weighing 16lb. The system is released from rest, and the blocks are observed to move 8.1ft in 5s. What is...
Wednesday, April 29, 2015 at 6:28pm

Accounting 111
Would the loss on retirement of long-term debt be added to or deducted from net in come in determining net cash flow from operating activities by the indirect method?
Wednesday, April 29, 2015 at 4:59pm

Math
1) Malene rented a compact car for 10 days and drove it 620 miles for a total cost of 412$. Patrick rented a compact car at the same rental car company for 6 days adn drove it 850 miles. His total cost was 295. Which system of equations could be used to determind d, the charge...
Wednesday, April 29, 2015 at 3:48pm

SS PANAMA QUIZ
Mexico City's pollution problem is made worse by its Farmland Mass Transit System Squatters Geography*** Why did the US first need to negotiate with Colombia to build the Panama Canal? Colombia was a neighboring country Part of the canal would be located in Colombia*** ...
Wednesday, April 29, 2015 at 11:00am

technology
A hydraulic lift system has an input piston with an area of 0,5 m2 and an output piston whith an area of 2 m2. What force is needes to lift a load of 1000 N?
Wednesday, April 29, 2015 at 1:43am

medical teriminology
When comparing the flow of lymph in the lymphatic system with the flow of blood in the circulatory system, it can be said that the lymphatic system also
Tuesday, April 28, 2015 at 12:42pm

linear
Suppose that we have a system consisting of two interconnected tanks, each containing a brine solution. Tank A contains x(t) pounds of salt in 200 gallons of brine, and tank B contains y(t) pounds of salt in 300 gallons of brine. The mixture in each tank is kept uniform by ...
Tuesday, April 28, 2015 at 11:32am

science
When comparing the flow of lymph in the lymphatic system with the flow of blood in the circulatory system, it can be said that the lymphatic system also A. contains fluid that travels in a closed circuit. B. uses a pump. C. contains fluid that travels in only one direction. D...
Monday, April 27, 2015 at 7:57pm

math
Sam has 18 coins in his pocket that are either quarters or nickels. The total value of these coins is $3.90. Let q represent the number of quarters and n represent the number of nickels. The following system of equations represents this situation: q+n=18 0.25q+0.05n=3.90 How ...
Monday, April 27, 2015 at 6:18pm

math
A community group bought 25 tickets to a play. Adult tickets cost $30 each and student tickets cost $20 each. In all, the group spent $620 on the tickets. Determine if each equation is a part of the system of equations that can be used to find the number of each type of ticket...
Monday, April 27, 2015 at 6:08pm

Algebra 222
How do I use substitution to solve the system? Please help Addition and equal key is not working . It's asking for x equals and y equals. -5x plus 2y equal 16 y equal 2x plus 7
Monday, April 27, 2015 at 11:52am

Physics
Can someone help me solve this? I've tried it a few times, but I keep getting answers that seem off. Like, for example, I'm getting 2.339 for part A, and it just seems completely off. So if you know the right formulas and can walk me through this, I'd appreciate it...
Monday, April 27, 2015 at 10:28am

Math 222
How do I use substitution to solve the system? Please help Addition and equal key is not working -5x plus 2y equal 16 y equal 2x plus 7
Monday, April 27, 2015 at 10:16am

Math 222
Please help me solve this system of equations? Sorry addition/equal key is not working. -2x plus 9y equal 3 -3x-4y equal 22
Monday, April 27, 2015 at 8:46am

Information Retrieval Architecture and Algorithms
What is the primary problem in Information Retrieval (IR) and what is the objective of an IR system? For each of the “Ingest” steps discuss how decisions on it can affect the primary problem (e.g., can it reduce the problem or have no effect) and the primary ...
Monday, April 27, 2015 at 1:35am

Chemistry
Samples of NH3 and 02 are placed in a rigid container. When the equilibrium below is established, the partial pressure of H2O is 0.784 atm. What is the partial erasure of NO when the system is at equilibrium? 4NH3 + 5O2 -----> 4NO + 6H2O
Monday, April 27, 2015 at 1:15am

p.e
Air pollutants can do all of the following except A. reduce your protection from the sun's radiation B. cause discoloration to your hair C. damage the respiratory system D. enter bloodstream and harm other parts of the body** Check pleaase
Sunday, April 26, 2015 at 11:32pm

Physics
The maximum speed of a 3.68-kg mass attached to a spring is 0.688 m/s, and the maximum force exerted on the mass is 11.6 N. What is the amplitude of motion for this mass? (in m) What is the force constant of the spring? (in N/m) What is the frequency of this system? (in Hz)
Sunday, April 26, 2015 at 11:03pm

PHYSICS
How do I solve this? A mine car (mass=380 kg) rolls at a speed of 0.50 m/s on a horizontal track, as the drawing shows. A 170-kg chunk of coal has a speed of 0.92 m/s when it leaves the chute (at a 25 degree incline). Determine the speed of the car–coal system after the ...
Sunday, April 26, 2015 at 5:46pm

PHYSICS
How do I solve this? Object A is moving due east, while object B is moving due north. They collide and stick together in a completely inelastic collision. Momentum is conserved. Object A has a mass of mA = 16.6 kg and an initial velocity of nu Overscript bar EndScripts ...
Sunday, April 26, 2015 at 3:03pm

physics133
1 The principle of conservation of heat energy states that that when an object is at constant temperature or is in thermal equilibrium, it is losing and gaining heat at equal rates. the heat lost by a hot body is equal to the heat gained by the cold body in any system provided...
Saturday, April 25, 2015 at 11:01pm

math
Can someone please explain this problem Find the general solution to the linear system of differential equations. x'1 x'2 x'3 = −4 −4 5 0 −4 4 0 4 2 x1 x2 x3
Saturday, April 25, 2015 at 4:25pm

Physics
A small mass slides without friction across a plane an (x,y) coordinate system directly from the origin to a point with (x,y) coordinates (1.3 m, 9.6 m); a constant force acts on it. The force has magnitude 2.1 N and its direction is at a counterclockwise angle of 128o from ...
Friday, April 24, 2015 at 8:26pm

physics 111 "2"
1 A stone thrown from ground level returns to the same level 4 s after. With what speed was the stone thrown? Take 20 m/s 10 m/s 30 m/s 15 m/s 2 What is common to the variation in the range and the height of a projectile? time of flight vertical acceleration horizontal ...
Friday, April 24, 2015 at 6:00pm

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Thursday, April 23, 2015 at 9:56am

Physics
Steam of mass 11.0 g at 100°C is added to 126.7 g of ice at 0.00°C. Find the final temperature of the system.
Wednesday, April 22, 2015 at 10:43pm

World History
1. Which of the following is a similarity between the Huang River and Indus Valley civilizations? A - the use of bronze ritual vessels B- a social class system with farmers at the bottom C - the exchange of ideas with other cultures D - the use of a metal currency Please help me
Wednesday, April 22, 2015 at 7:03pm

Physics
You attach one end of a spring with a force constant k = 893 N/m to a wall and the other end to a mass m = 2.02 kg and set the mass-spring system into oscillation on a horizontal frictionless surface as shown in the figure. To put the system into oscillation, you pull the ...
Wednesday, April 22, 2015 at 5:20pm

SS
What changes did the Aryan migration bring to India? (1 point) The Aryans brought Islam to the region of South Asia. The Aryans developed the Mughal Empire. The Aryans established the caste system and helped develop Hinduism. The Aryans helped spread Buddhism throughout the ...
Wednesday, April 22, 2015 at 4:10pm

Chemistry
One mole of N2 and 3 moles of H2 are placed in a flask at 375 degree celsius.? Calculate the total pressure of the system at equilibrium if the mole fraction of NH3 is found to be 0.21. The Kp for the reaction is 4.21 x 10 raise to -4
Wednesday, April 22, 2015 at 4:07pm

Statistics
An automatic machine in a manufacturing process is operating properly if the length of an important subcomponent is normally distributed with a mean μ = 80 cm and a standard deviation σ = 2 cm. a) Find the probability that the length of one randomly selected unit is ...
Wednesday, April 22, 2015 at 10:43am

SOCIAL STDIES HELP! 8th
2. Which was a part of the Populist Party’s platform? (1 point) tax breaks for farmers*** civil rights for all Americans higher tariffs on foreign goods increased industrial development 3. Whom did Rebecca Latimer Felton replace when she was appointed a senator in the ...
Tuesday, April 21, 2015 at 8:34pm

Social Studies
1. Which question would best help you write a report regarding the changes to the political system during Jackson's presidency? (1 point) A. How did Andrew Jackson react to the results of the election of 1824? B. When did Andrew Jackson decide to run for president? C. Did ...
Tuesday, April 21, 2015 at 7:20pm

History
Q: The Gadsden Purchase enabled the United States to do which of the following? A. Gain access to important natural resources in the Southwest B. Increase crop production in the Southwest C. Link to the Southwest by railway system D. Provide better defenses against Mexico
Tuesday, April 21, 2015 at 12:52pm

Ethics in Tech
The Patriot missile system: A. was designed to shoot down airplanes. B. failed to shoot down a Scud missile that killed 28 U.S. soldiers in the Gulf War. C. failed because it had been left running too long. D. All of the above is it D
Tuesday, April 21, 2015 at 11:54am

system analysis and designs
what is form . explain form design methodlogy?
Tuesday, April 21, 2015 at 11:06am

History Please With A Cherry On Top
1. Texans responded to the water crisis in all of these ways EXCEPT building new reservoirs. turning more to irrigation. building more dams. enacting water conservation laws.* 2. Which of the following was a pioneer in the treatment of heart disease? Walter Cunningham Michael ...
Monday, April 20, 2015 at 9:11pm

science 8th (:: 1 question
The ball in the image below is rolling toward the block. The ball will create a disturbance in the stability of the block by knocking it over. Which of the following correctly predicts what will happen to the block? [image of ball rolling toward tall, skinny block] - Unstable ...
Monday, April 20, 2015 at 1:18pm

physics
1. Calculate the work done on the system when 1.00 mol of gas held behind a piston expands irreversibly from volume of 1.00dm cube to a volume 10.00dm cube against an external pressure of 1.00 bar. 2. A perfect gas expand reversibly at a constant temperature of 298k so that ...
Monday, April 20, 2015 at 5:48am

Chemistry
Check my work & answer please. I need to make sure I am able to do this type of problem correctly. A typical car engine produces 44,000 kJ of heat in an hour. The cooling system has a capacity of 8.40 L and is filled with a 50:50 mixture of anti-freeze (specific heat capacity ...
Sunday, April 19, 2015 at 10:03pm

Chemistry
4. A typical car engine produces 44,000 kJ of heat in an hour. The cooling system has a capacity of 8.40 L and is filled with a 50:50 mixture of anti-freeze (specific heat capacity of 8.37 J/g-oC, density of 1.038 g/mL). In maintaining a constant engine temperature, the ...
Saturday, April 18, 2015 at 7:28pm

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Saturday, April 18, 2015 at 1:59pm

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Saturday, April 18, 2015 at 11:30am

math help
A tank has two pipes entering it.when operating together,they fill the tank in 40 minutes.operating independently,one of the pipes fills the tank 60 minutes faster than the other one does. Calculate the time taken by each pipe to fill the tank on its own.
Saturday, April 18, 2015 at 11:30am

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Friday, April 17, 2015 at 11:58pm

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Homework Help: Computers

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