Homework Help: Computers: Operating Systems

Recent Homework Questions About Operating Systems

Chemistry
Answer the following questions by referring to the Cu-Al phase diagram shown below. (a) What is the lowest temperature at which a liquid can be found in a system of any composition of Cu-Al ? (b) A common alloy composition used in airplanes is 4 at. % Cu - 96 at. % Al. For ...
Saturday, December 15, 2012 at 5:13pm

physics
is2A wedge of mass M fitted with a spring of stiftness k is kept on a smoth hrizontal surface. A rod of mass m is kept on the wedge as shown in the figure. System is in equilibrium. Assuming that all the surfaces are smooth, the potential energy stored in the spring: a) ...
Saturday, December 15, 2012 at 2:14pm

PLEASE HELP EARTH SCIENCE EMERGENCY!!!!
Describe two complexities about Earth's climate system that results in changes happening faster than expected.
Saturday, December 15, 2012 at 11:53am

Chemistry
(a) The figure above shows how the energy of a system varies as a chemical reaction proceeds. Match the numbers features labeled on the figure above to their corresponding statements below: energy state of the reactants: 1/2/3/4/5 activation energy of the reaction: 1/2/3/4/5 ...
Friday, December 14, 2012 at 1:25am

math please help fast
How many solutions are there to the following system of equations? 2x – y = 2 –x + 5y = 3 A. 0 B. 1 C. 2 D. infinitely many
Thursday, December 13, 2012 at 4:15pm

math helpp!!!
Bernie put in a garden in her back yard. The garden has a perimeter of 265 feet. She wants to know the total surface area of the garden and all she knows is the perimeter and that the width is 20% or (1/5) of the length. (Remember 20% and the fraction 1/5 is the same decimal ...
Thursday, December 13, 2012 at 3:58pm

Chemistry
Consider the gold-platinum system which has a value of delta w of -4250 J/mole; (a) Calculate the enthalpy of mixing for a solution of 10% platinum and 90% gold. Express your answer in units of kJ/mole. (b) Is the dissolution of 10% platinum into gold an endothermic or an ...
Thursday, December 13, 2012 at 3:09am

physics
Imagine that a new asteroid is discovered in the solar system with a circular orbit and an orbital period of 7 years. What is the average distance of this object from the Sun in Earth units?
Thursday, December 13, 2012 at 2:30am

Financial management
Need definition and scenario in healthcare for these words Term Definition Scenario Capital expenditure budget Direct cost Flexible budget Operating budget Responsibility center
Wednesday, December 12, 2012 at 11:55pm

Physics
What is the momentum of a two-particle system composed of a 1400 kg car moving east at 90 m/s and a second 900 kg car moving west at 95 m/s? Let east be the positive direction.
Wednesday, December 12, 2012 at 7:50pm

Grammar
Select the correct sentence: A) The patient was not seen for prenatal care until 24 weeks gestation. B) The patient was not seen for prenatal care until 24 weeks' gestation. I answered A The operating room was _____. A) all ready B) already my answer is A
Wednesday, December 12, 2012 at 7:10pm

math
how do you convert miles to feet in the U.S. customary system?
Wednesday, December 12, 2012 at 6:01pm

Math Help PLease Fast!!!!!!!!!!!!!!
Graph the system of inequalities. Then use your graph to identify the point that represents a solution to the system. x > ¨C2 y ¡Ü 2x + 7 A. (¨C1, 6) B. (1, 11) C. (¨C1, 4) D. (¨C3, ¨C1)
Wednesday, December 12, 2012 at 1:28pm

maths --plse help me..
Solve the system of equations for positive real numbers: 1/xy = x/z + 1, 1/yz = y/x + 1, 1/zx = z/y + 1.
Wednesday, December 12, 2012 at 9:14am

physics
In another solar system, a 100,000 kg spaceship and a 200,000 kg spaceship are connected by a motionless 90 m long tunnel. The rockets start their engines at the same time, and each produces 50,000 N of thrust in opposing directions. What is the system's angular velocity ...
Tuesday, December 11, 2012 at 9:04pm

Science
i posted this earlier, but no one answered. so i'll try again. Can you check my work please? true/false 1.) force is a scalar quantity: *FALSE 2.) the object on which a force acts is called the system: *TRUE 3.)The specific, indentifiable cause of a force is called the ...
Tuesday, December 11, 2012 at 6:28pm

Social Studies
who controls the economy in a free enterprise system
Tuesday, December 11, 2012 at 6:27pm

AP Physics B
system consists of a steal beam of mass M 􏰀 68.4 kg and length L 􏰀 1.84 m, with a 39.0-kg brass sphere attached at the right end of the rod, as shown below. BA a. Determine the moment of inertia of the system for rotation about an axis through the center of ...
Tuesday, December 11, 2012 at 6:11pm

Science
How does technology help people with diseases of the digestive system?
Tuesday, December 11, 2012 at 3:54pm

PHYSICS ~so confused~
so i'm going to try my hardest to type this out. which of the following system of forces provides the block the highest net force? a.) 11N--->[box]<---71N b.) 405N--->[box]<---403N c.) 227N--->[box]<---153N d.) 22.7N--->[box]<---15.3N I thought this...
Tuesday, December 11, 2012 at 3:23pm

Physics-please check my work
Can you check my work please? true/false 1.) force is a scalar quantity: *FALSE 2.) the object on which a force acts is called the system: *TRUE 3.)The specific, indentifiable cause of a force is called the system: *FALSE 4.) A force can not exist without an agent and a system...
Tuesday, December 11, 2012 at 2:57pm

Chemistry
(a) The phase diagram of the binary system, neodymium-scandium ( Nd-Sc ) is given below. There are two polymorphs in the solid state: alpha which is hexagonal close packed (HCP) and beta which is body-centered cubic (BCC). Identify all phases present at points 1, 2, and 3. ...
Tuesday, December 11, 2012 at 3:35am

chemistry
Assume that a particular reaction evolves 241 of heat and that 25 of work is gained by the system. What are the values of delta E and delta H for the system?
Monday, December 10, 2012 at 9:35pm

physics
A brother (mass 20 kg) and his big sister (mass 32 kg) want to play on a teeter-totter. The beam is 7 m long and has a mass of 41 kg. Suppose the brother sits at the end of his side, 3.5 m away from the pivot point. How far away from the pivot point does the sister need to ...
Monday, December 10, 2012 at 7:00pm

Pre Calc
1. Describe the linear programming situation for this system of inequalities. x<(or equal too)1 y>(or equal too)0 3x + y<(or equal too)5 2. Describe the linear programming situation for this system of inequalities where you are asked to find the maximum value of f(x, ...
Monday, December 10, 2012 at 6:40pm

Economics
The total operating revenues of a public transportation authority are $100M while its total operatiing costs are $120M. The price per ride is $1, and the price elasticity of demand for transportation ia -0.4. The transportation authority has to eliminate its operating deficit...
Monday, December 10, 2012 at 6:31pm

Trigonometry
IM STUCK ON THESE :( 1. What is the equation for shifting the standard sine curve +2 units horizontally? A. y = sin (x + 2) B. y = sin x + 2 C. y = sin x − 2 D. y = sin (x − 2) 3. What is tan-¹ √3/3 ? A. π/4 B. -π/3 C. π/6 D. -π/4 4. ...
Monday, December 10, 2012 at 2:24pm

case management
15. If we do not follow up with clients, what is the risk that may happen? A. the client will get lost in the system or drop out B. the client may go to another provider or organization C. services will cluster around the physical aspects D. the client will may become ...
Monday, December 10, 2012 at 12:13pm

case management
11. Our textbook describes a conflict of interest in advocacy. Who is this between? A. the client and case manager B. the client and their support system C. the case manager and their employers D. the advocate and the case manager
Monday, December 10, 2012 at 12:10pm

PSYchology 220
# 1.59 (1 pts.) Ralph has been sad and listless for 3 years. He can't sleep and has lost his appetite. Using a diagnostic system, one clinician arrives at a diagnosis of depression. Using the exact same diagnostic system, another clinician arrives at a diagnosis of ...
Sunday, December 9, 2012 at 9:04pm

math
Bernie put in a garden in her back yard. The garden has a perimeter of 272 feet. She wants to know the total surface area of the garden and all she knows is the perimeter and that the width is 20% or (1/5) of the length. (Remember 20% and the fraction 1/5 is the same decimal ...
Sunday, December 9, 2012 at 6:33pm

Mathematics of Retailing
An owner of a laundry shop received an invoice for purchasing 200 bottles of liquid detergent at RM15 each, and 300 bottles of fabric softener at RM8 each. The invoice dated on 6th August 2010. He was offered trade discount 10% and 8%, with cash discount 10/10, 5/20, n/30. The...
Sunday, December 9, 2012 at 11:51am

Accounting
1. A manager is considering the following investment: Initial capital investment $180,000 Estimated useful life 3 years Estimated disposal value in 3 years 0 Estimated annual savings in cash operating costs $80,000 Minimum desired rate of return 10% The net present value of ...
Saturday, December 8, 2012 at 4:33pm

Cultural Anthropology 101
Could some one PLEASE check my answers Competition among co-wives in a polygynous household is reduced when: ****(a) Sororal polygyny is practiced. co-wives all live in the same household and share the same kitchen. the wives all live together. the co-wives father had multiple...
Saturday, December 8, 2012 at 2:54pm

thermodynamics
the mass of a fluid system is .311 slug, its density is 30lb.ft^3 and g is 31.90fps^2. a) find the specific volume, b) the specific weight, and c) total volume
Saturday, December 8, 2012 at 12:57am

The Age Of Jefferson To The American Expansion
1. Which of the following utopian communities was founded and established in New York State? A. Shaker Village B. Spiritualist C. Oneida D. New Harmony 2. The first fully developed American factory system emerged in the _______ industry. A. textile B. sugarcane C. distilling D...
Friday, December 7, 2012 at 5:36pm

Physics
A compact 60-kg object is attached to one end of horizontal 40-kg uniform steel tube 2.4m long. What is the distance from the loaded end to the center of gravity of the object-tube system?
Friday, December 7, 2012 at 2:41pm

Physics
How far is the center of mass of the Earth-Moon system from the center of the Earth? The Earth's mass is 5.97e24 Kg, the Moon's mass is 7.4e22 Kg, and the distance between their centers is 3.8e8m.
Friday, December 7, 2012 at 12:35pm

physics
The load-bearing piston in a certain hydraulic system has an area 20 times as large as the input piston. If the larger piston supports a load of 2000N, how large a force must be applied to the input piston? A certain boat displaces a volume of 4.5m3 of water (the density of ...
Friday, December 7, 2012 at 10:12am

Chemistry
Assume that a particular reaction evolves 230 kJ of heat and that 28 kJ of PV work is gained by the system. What are the values of delta E and delta H for the system? For the surroundings?
Thursday, December 6, 2012 at 10:58pm

western michigan university
A 30 gram metal at 100 degrees Celsius was dropped into 132 grams of water at 25 degrees Celsius and the final temperature for the metal in water system was 29 degrees Celsius. Calculate the specific heat capacity of the metal if the specific heat capacity of water is 4.2J/G/C...
Thursday, December 6, 2012 at 10:29pm

Math
Use the substitution method to solve the following system of linear equations: x + y = 6 x = –y + 2 A. There are an infinite number of solutions. B. The solution is (2, 4). C. The solution is (4, 2). D. There is no solution.
Thursday, December 6, 2012 at 9:29pm

Chemistry 12
given the reacting system: H2 (G) + I2(G) ---> 2HI(g) Keq= 64 Equal moles of H2, I2, and HI are placed in a 1.0 L container. Use calculations to determine the direction the reaction will proceed in order to reach equilibirum
Thursday, December 6, 2012 at 8:35pm

Math
How do you set this up? Solve the system using substitution: A boat travels 18 miles downstream in 1.5 hrs. It then takes the boat 3 hrs. to travel upstream the same distance. Find the speed of the boat in still water and the speed of the current. Thanks you!!!
Thursday, December 6, 2012 at 8:22pm

Physics
The period of motion of an object-spring system is T = 0.474 s when an object of mass m = 296 g is attached to the spring. (a) Find the frequency of motion in hertz. _______Hz (b) Find the force constant of the spring. _______N/m (c) If the total energy of the oscillating ...
Thursday, December 6, 2012 at 7:13pm

PHYSICS - PLEASE HELP
Three objects are moving along a straight line as shown in the figure. Taking the positive direction to be to the right, what is the total momentum of this system? Pos ---> 5.00 m/s, 8.00 kg Neg <--- 4.00 m/s, 15.00 kg Pos ---> 2.00 m/s, 3.00 kg A) -14 kg m/s B) +106 ...
Thursday, December 6, 2012 at 3:30pm

science
What is the wavelength of waves transmitted by an AM radio station operating at a frequency of 840 kilohertz? Calculate the energy of a photon whose frequency is 2450 megahertz What is the difference in energy for a photon of ultra-violet radiation, wavelength 319 nm and a ...
Wednesday, December 5, 2012 at 10:42pm

physic
1) A 2 . 3 kg object moving at 7.3 m/s collides inelastically with a 4.0 kg object which is initially at rest. What percentage of the initial kinetic energy of the system is lost during the collision?
Wednesday, December 5, 2012 at 10:36pm

math
how do i solve this linear system using substitution or elimination -16x+2y= -2 y=8x-1
Wednesday, December 5, 2012 at 9:06pm

Physics 1
The period of oscillation for a mass-on-a-spring system is 0.14 s. If m = 3.9 kg, what is the spring constant of the spring? ____N/m
Wednesday, December 5, 2012 at 8:34pm

math
Pool length (m) 9 Depth of pool (m) 1.6 Pool length (ft) 29 Is it correct to write that 9m (metric system) is 29 feet
Wednesday, December 5, 2012 at 2:02pm

easy chemistry
what is the entropy of 10 molecules in a system of 100 boxes?
Wednesday, December 5, 2012 at 12:00pm

us history
In many ways after the divisiveness and devastation of the Civil War, the United States searched for order economically, politically, geographically, socially and racially. Select one of these areas, or suggest another, and make a case for the reasons why it was the most vital...
Wednesday, December 5, 2012 at 11:44am

Physics
Figure 18-46 shows a hydraulic lift operated by pumping fluid into the hydraulic system. The large cylinder is 40 cm in diameter, while the small tube leaving the pump is 1.7 cm in diameter. A total load of 2500 kg is raised 2.2 m at a constant rate. Neglect pressure ...
Wednesday, December 5, 2012 at 8:26am

Physics
In an old house, the heating system uses radiators, which are hollow metal devices through which hot water or steam circulates. In one room the radiator has a dark color (emissitivity = 0.804). It has a temperature of 65.9 oC. The new owner of the house paints the radiator a ...
Wednesday, December 5, 2012 at 1:08am

algebra
a large group of students want to go to the movies. if the students take 3 vans and 1 car they can transport 22 people. if they take 2 vans and 4 cars. they can transport 28 people.write and solve a system of equations to find the number of people that can be transported in a ...
Tuesday, December 4, 2012 at 7:21pm

Science
Which planet has the strongest winds in the solar system and the Great Dark Spot?
Tuesday, December 4, 2012 at 5:38pm

geography
Can you check my answers please? 1. What continents touch the 60 degrees W line of longitude? North America and South America, Antarctica 2. What do green areas on physical maps usually mean? It usually means land or low-lying land areas. 3. What is the capital of Switzerland...
Monday, December 3, 2012 at 7:36pm

Social Studies
A-Cabinet B-Checks and Balances C-Commander in Chief D-Constitution E-Congress F-Executive Branch G-House of Representative H-Impeachment I-Judicial Branch J-Legislative branch K-Senate L-Supreme Court 1. A system in which no one government branch has too much power B? A tool ...
Monday, December 3, 2012 at 6:37pm

accounting
Ihave recently closed my retail business. While operating I only expensed my items purchased for resale when they were sold. So my inventory is personally owned. What do I declare as ex-tax inventory now that my business is closed... $0?
Monday, December 3, 2012 at 2:57pm

accounting
On September 1, 2013, Jacob Furniture Mart enters into a tentative agreement to sell the assets of its office equipment division. This division qualifies as a component of the entity according to GAAP regarding discontinued operations. The division's contribution to Jacob...
Monday, December 3, 2012 at 6:25am

Physics
A new roller coaster is a conservative system. If the coaster leaves the starting point with a speed of 5 m/s and a height of 25 m, what is its velocity when it reaches a height of 2.5 m? A. 9.81 m/s^2 B. 21.6 m/s C. 15.4 m/s D. 12.6 m/s Pls show work thank u!
Monday, December 3, 2012 at 12:09am

physics
Question Part Points Submissions Used A thin cylindrical rod of length 3.00 m and mass 1.5 kg has two spheres attached on its ends. The centers of the spheres are 1.50 m from the center of the rod. The mass of each sphere is M = 0.72 kg. The rod and spheres are initially at ...
Sunday, December 2, 2012 at 10:10pm

Math
6x-4y=54 -9x+2y=-69 Which system would work best to solve? Please show work and solve. (all steps) Thank You I honestly don't know how to do this.
Sunday, December 2, 2012 at 9:36pm

Physics
The vector position of a 3.40 g particle moving in the xy plane varies in time according to the following equation. At the same time, the vector position of a 5.05 g particle varies according to the following equation. For each equation, t is in s and r is in cm. Solve the ...
Sunday, December 2, 2012 at 7:42pm

Computers
Develop a use case diagram for a department store credit card system. Include at least two actors and four use cases.
Sunday, December 2, 2012 at 7:22pm

Calculus
Equation 1: (d[Y])/dt = k1 - v2[Y]*((ϵ^2+([X]/Kn )^2)/(1+([X]/Kn )^2 )) Equation 2: (d[X])/dt = v2[Y]*((ϵ^2+([X]/Kn )^2)/(1+([X]/Kn )^2 )) - k3[X] Kn=3 and ϵ=0 How do I find the value of [X] when system is at steady state?
Sunday, December 2, 2012 at 5:59pm

accounting
On July 1, 2013, a firm purchased a 1-year insurance policy for $6,300 and paid the full premium in advance. The insurance expense associated with this policy for the year ending December 31, 2013, is $6,300. $3,150. $3,675. $2,100. On January 2, 2014, a firm purchased ...
Sunday, December 2, 2012 at 5:24pm

Accounting
On July 1, 2013, a firm purchased a 1-year insurance policy for $6,300 and paid the full premium in advance. The insurance expense associated with this policy for the year ending December 31, 2013, is $6,300. $3,150. $3,675. $2,100. On January 2, 2014, a firm purchased ...
Sunday, December 2, 2012 at 5:21pm

LAN network workshop
6. School network LAN A school wants to have their 5 computers labs with Internet connection. Each lab having 21 computers that directly connected to each other and to the Internet. Each lab is aligned vertically at each floor from ground to fifth floor. The main Internet ...
Sunday, December 2, 2012 at 4:24am

Physics
Assuming there is no conduction or convection operating, a cold object in a warm room: A.Radiates more energy than it absorbs B.Absorbs more energy than it radiates C.Only absorbs energy; it does not radiate because it is colder than its environment.
Saturday, December 1, 2012 at 10:48pm

physics
Two astronauts, each having a mass of 78.5 kg, are connected by a 10.0-m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.50 m/s. Treating the astronauts as particles, calculate each of the following...
Saturday, December 1, 2012 at 8:47pm

precalculus
Find all solutions of the system of equations. (If there is no solution, enter NO SOLUTION.) 4x^2− 27y^3 = 35 8x^2+54y^3= 74
Saturday, December 1, 2012 at 7:17pm

precalculus
Find all solutions of the system of equations. Order your answers from smallest to largest x, then from smallest to largest y.) x^2 + y2= 53 x2− y2= 3
Saturday, December 1, 2012 at 7:15pm

ACCOUNTING
Mills Company uses standard costing for direct materials and direct labor. Management would like to use standard costing for variable and fixed overhead. The following monthly cost functions were developed for manufacturing overhead items: Overhead Item Cost Function Indirect ...
Saturday, December 1, 2012 at 1:44am

physics
A 0.330-kg block of wood rests on a horizontal frictionless surface and is attached to a spring (also horizontal) with a 29.5-N/m force constant that is at its equilibrium length. A 0.0600-kg wad of Play-Doh is thrown horizontally at the block with a speed of 3.00 m/s and ...
Friday, November 30, 2012 at 5:51pm

PHYSICS
A spring is hung from a ceiling, and an object attached to its lower end stretches the spring by a distance d = 7.70 cm from its unstretched position when the system is in equilibrium as in the figure below. If the spring constant is 48.0 N/m, determine the mass of the object...
Friday, November 30, 2012 at 2:34pm

physics
A hydraulic brake system is shown. The area of the piston in the master cylinder is 6.32 cm^2, and the area of the piston in the brake cylinder is 1.83 cm^2. The coeﬃcient of kinetic friction between the brake shoe and the wheel drum is 0.443. How large is the ...
Friday, November 30, 2012 at 12:16pm

college physics
A hydraulic brake system is shown. The area of the piston in the master cylinder is 6.32 cm^2, and the area of the piston in the brake cylinder is 1.83 cm^2. The coeﬃcient of kinetic friction between the brake shoe and the wheel drum is 0.443. How large is the ...
Thursday, November 29, 2012 at 11:33pm

physics
A basketball of mass 0.602 kg is passed to a player of mass 83.0 kg who jumps off the floor while catching the ball. The player's center of mass is instantaneously at rest just before he catches the ball, which is initially moving at a velocity of 11.5 m/s, directed 30.0&...
Thursday, November 29, 2012 at 10:32pm

physics
Two cars approach an ice-covered intersection. One car, of mass 1.22 103 kg, is initially traveling north at 10.6 m/s. The other car, of mass 1.69 103 kg, is initially traveling east at 10.6 m/s. The cars reach the intersection at the same instant, collide, and move off ...
Thursday, November 29, 2012 at 10:15pm

Physics
A 12.8 gram bullet embeds itself in a 2.370 kg block on a horizontal frictionless surface which subsequently collides with a spring of stiffness 487 N/m. The maximum compression of the spring is 11.0 centimetres. a) What was the initial speed of the bullet in m/s? b) How long ...
Thursday, November 29, 2012 at 8:10pm

science
HELP FAST!!!!!!!!!!!!!!!! If you see that a hot-air balloon is rising above the top of a hill, what is the top of the hill called? A. delta point B. distance system C. coordinate system D. reference point
Thursday, November 29, 2012 at 11:11am

basic math
An education fund allocates RM10,000 to help 100 students from form three, form five and form six in a school. Each form three student receives RM80, each form five student receives RM120 and each form six student receives RM160. The number of form three students that receive ...
Thursday, November 29, 2012 at 6:27am

chem
Using LeChatelier's principle, predict the direction of the net reaction in each of the following system as a result of decreasing the volume of the chamber for the reaction mixture. Where does the direction shifts? a.) N2(g)+ O2(g)= 2NO(g) b.) PCl5(g)=PCl3(g)+Cl2(g) c.) ...
Wednesday, November 28, 2012 at 11:37pm

physics
Two billiard balls of equal mass move at right angles and meet at the origin of an xy coordinate system. Ball A is moving upward along the y axis at v_A = 2.0m/s , and ball B is moving to the right along the x axis with speed v_B = 5.0m/s . After the collision, assumed elastic...
Wednesday, November 28, 2012 at 11:34pm

chem
Predict the direction of the net reaction in each of the following system, as a result of increasing the temperature. Delta H is an indicator or whether the reaction releases heat delta H(-), or heat is absorb delta H(+). Write where the direction shifts. a)3O2(g)=2O3(g) H=+...
Wednesday, November 28, 2012 at 11:32pm

account
Assume it is Monday, May 1, the first business day of the month, and you have just been hired? Assume it is Monday, May 1, the first business day of the month, and you have just been hired? Assume it is Monday, May 1, the first business day of the month, and you have just been...
Wednesday, November 28, 2012 at 7:00pm

Grammar
Select the sentence in which the verb tenses agree: A) The patient was taken to the operating room, placed in the supine position, and general endotracheal anesthesia will be induced. B) The patient will be taken to the operating room, was placed in the supine position, and ...
Wednesday, November 28, 2012 at 6:39pm

chem
For the following equilibrium system, which of the changes will form more CaCO3 (more moles CaCO3)? CO2 + Ca(OH)2=CaCO3 +H2O delta H =-113kJ Write and explain if amount CaCO3 decrease, no change or increase with regards to the following situations: a) Decrease temperature at ...
Wednesday, November 28, 2012 at 5:35pm

Chemistry
What is the final volume (L) of a 1.00 L system at 315 K and 1.10 atm if STP conditions are established?
Wednesday, November 28, 2012 at 2:56pm

physics
A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the origin to x=5.0 cm and ...
Wednesday, November 28, 2012 at 11:00am

CHEMISTRY
A volume of 100ml of h20 is initially at room temperature (22.0c). A chilled steel rod at 2.00C is placed in the water. If the final temperature of the system is 21.2C , what is the mass of the steel bar?
Wednesday, November 28, 2012 at 12:54am

Math: Algebra 1
2. What is the solution of the system? 7x + 5y = 19 –7x – 2y = –16 A.) (2, 1) B.) (1, 2) C.) (7, 5) D.) (–7, –2) I think it is A.
Tuesday, November 27, 2012 at 7:30pm

Math: algebra 1
6. In which quadrant does the solution of the system fall? y = x – 1 y = –3x – 5 A.) I B.) II C.) III D.) IV I think it is c.
Tuesday, November 27, 2012 at 7:29pm

Math: Algebra
1. Which method would be the simplest way to solve the system? 7x + 5y = 19 –7x – 2y = –16 A.) graphing B.) substitution C.) elimination D.) distributive I think it is C.
Tuesday, November 27, 2012 at 7:27pm

Math: algebra 1
3. Which method would be the simplest way to solve the system? y =1/2 x 2x + 3y = 28 A.) graphing B.) substitution C.) elimination D.) distributive I think it is B.
Tuesday, November 27, 2012 at 7:25pm

Algebra 1
The gardeners at Middleton Place Gardens want to plant a total of 45 white and pink hydrangeas in one flower bed. In another flower bed, they want 120 hydrangeas. In this bed, they want 2 times the number of white hydrangeas and 3 times the number of pink hydrangeas as in the ...
Tuesday, November 27, 2012 at 7:05pm

chem101
Endothermic reaction equilibrium: BiCl3(aq) + H2O(g) = BiOCl(s) +2HCL(aq) + 2 HCl at a point at which the sollution is colorless and a small minute amoount of BiOCl(s) is observed. for the folowing questions 1to 5: a. state which way the reaction shift in terms of LeChateliers...
Tuesday, November 27, 2012 at 6:15pm

math
The cost "C" of operating a concrete-cutting machine is related to the number of minutes "n" the machine is run by the function: C(n)=2.2n⋀2-66n+655. For what number of minutes is the cost of running the machine a minimum? What is the minimum cost?
Tuesday, November 27, 2012 at 5:39pm

abnormal psych
# 1.44 (1 pts.) Dr. Green is an admitting psychologist at a psychiatric hospital. Unfortunately, every client she interviews receives the diagnosis of schizophrenia. Dr. Green's diagnostic system ignores A) reliability. B) variance. C) base rates. D) treatment potential...
Tuesday, November 27, 2012 at 1:11pm

math
a system has a total mechanical energy of 350 J and kinetic energy of 220 J. what is its potential energy?
Tuesday, November 27, 2012 at 1:06pm

chem
Endothermic reaction equilibrium: BiCl3(aq) + H2O(g) = BiOCl(s) +2HCL(aq) + 2 HCl at a point at which the sollution is colorless and a small minute amoount of BiOCl(s) is observed. for the folowing questions 1to 5: a. state which way the reaction shift in terms of LeChateliers...
Tuesday, November 27, 2012 at 10:19am

social studies
Explain whether the following statement is a fact or an opinion: "Capitalism is a better system of government than communism." Give reasons for your answer.
Monday, November 26, 2012 at 10:14pm

7th grade social studies Ms.Sue please
1. Which pair of basic questions guides geographers in their work? (1 point) Where are things located? and Why are they there? What is the climate? and Why has it changed? When did Earth form? and What is it made of? Who lived where? and When did they move? 2. To learn more ...
Monday, November 26, 2012 at 8:25pm

physics
A large block P executes horizontal simple harmonic motion as it slides across a frictionless surface with a frequency f = 0.3 Hz. (a) What is the angular velocity of this system?
Monday, November 26, 2012 at 6:29pm

physcis
A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the origin to x=5.0 cm and ...
Monday, November 26, 2012 at 6:11pm

university, physics
A coffee maker is rated at 1200 W, a toaster at 1100 W, and a waffle maker at 1400 W. The three appliances are connected in parallel to a common 120-V household circuit. (a) What is the current in each appliance when operated independently? (b) What total current is delivered ...
Monday, November 26, 2012 at 4:06pm

english
How to write a Solar System poem?
Monday, November 26, 2012 at 2:59pm

Accounting
The following information was made available from the income statement and balance sheet of Lauren Company. Item 12/31/10 12/31/09 Accounts Receivable $53,400 58,600 Accounts Payable 35,600 32,700 Merchandise Inventory 85,000 79,000 Sales (2010) 243,000 Interest Revenue (2010...
Monday, November 26, 2012 at 1:48pm

math
Mr.Jacobsen wants to hire a magician for his son's birthday party. Marion has a travel fee of $30 and charges $15 per hour. Gregory has a travel fee of$50 and charges $10 per hour. Define a variable. Then write a system of equatins to represent the situation. Solve the ...
Monday, November 26, 2012 at 11:13am

math
Robert has 26 coins that are all nickels and dimes. The value of the coins is $1.85. Write and solve a system of eqations thatrepresents this situation.
Monday, November 26, 2012 at 11:06am

math
Lena bought a total of 20 postcards. She bought 6 more large poscards than small. Write a system of equations that represents the postcards Lena purchased. Solve the system by substitution. Interpret the solution.
Monday, November 26, 2012 at 10:44am

Itroduction to finance
Anaswer all questions You have been commissioned to analyse the financial statements of MILOPA LIMITED. Below are the Consolidated statement of financial position and the Statement of Comprehensive Income of the companies. STATEMENTS OF FINANCIAL POSITION as at 31 December ...
Monday, November 26, 2012 at 5:47am

Physic
A wheel-and-axle system shown consists of two coaxial wheels of radius r = 2 meters and R = 6 meters. The forces applied to the system as shown in the diagram are: F1 = 80 N F2 = 80 N F3 = 40 N F4 = 30 N If counterclockwise is positive, what is the net torque on this system?
Sunday, November 25, 2012 at 9:09pm

Programming
How would the flow charts and pseudocode look for this? The Metric Conversion application is a menu-driven program. First, the program displays a Main Menu that states the purpose of the program and allows the user to select one of five metric system measurements or quit the ...
Sunday, November 25, 2012 at 8:32pm

physics
a 2.00kg copper plate with an initial temperature of 20.0 degrees Celsius slides with a constant velocity down a 150m long surface that is inclined at 30 degrees angle to the horizontal. If the mechanical energy lost by the system due to friction is absorbed by the copper to ...
Sunday, November 25, 2012 at 7:30pm

Physics
You have setup an experiment with two 50g masses attached to strings that are connected on opposite sides of a scale that measures weight in Newtons. a.) What is the reading on the scale? b.) The whole system is now moving to the left at a speed of 10m/s. What is the reading ...
Sunday, November 25, 2012 at 5:05pm

Accounting
Please Help!!!! Trying to get a little help on working this accounting problem. Please help... Jawed enterprises uses a job-order costing system and a predetermined overhead rate based on machine hours. At the beginning of the year, the company estimated manufacturing ...
Sunday, November 25, 2012 at 2:04am

Accounting
Trying to get a little help on working this accounting problem. Please help... Jawed enterprises uses a job-order costing system and a predetermined overhead rate based on machine hours. At the beginning of the year, the company estimated manufacturing overhead for the year ...
Saturday, November 24, 2012 at 9:38pm

Chemistry
crystal structure of cesium chloride (CsCl). 1)Identify the crystal system: Cubic Tetragonal Orthorhombic Rhombohedral Hexagonal Monoclinic Triclinic 2)Identify the Bravais lattice: Simple cubic Body Centered Cubic Face Centered Cubic Hexagonal 3)Identify the basis of the ...
Saturday, November 24, 2012 at 12:44pm

math help please
Solve the following system of equations using substitution. What is the value of y? 2x + 3y = 105 x + 2y = 65 A.15 B.25 C.40 D.65 I think it is B??
Saturday, November 24, 2012 at 10:26am

math help please
For the following system of equations, what is the x-value of the solution? –x + 2y = 6 6y = x + 18 A.-18 B.0 C.-6 D.3 I think its B??
Saturday, November 24, 2012 at 10:25am

Information Technology
I am pressed for time and need this assignment done by Sunday please. The language used is Java. I have attatched both worksheets to be used in this assignment. Thank you so much. Please reread the description of the Metric Conversion program in Worksheet A in the Course ...
Saturday, November 24, 2012 at 9:28am

math help please
Which cannot describe a system of linear equations? no solution exactly two solutions infinite solutions exactly one solution I thought it was A or D but someone else is telling me it is B...no I'm confused...I thought it was 2 or more solutions
Friday, November 23, 2012 at 10:06pm

Physics
A block with mass m = 2.00 kg is placed against a spring on a frictionless incline with angle θ=30.0° (see figure). The block is NOT attached to the spring. The spring, with spring constant k = 19.6 N/cm, is compressed 20.0 cm from its unloaded equilibrium length and ...
Friday, November 23, 2012 at 9:57pm

Physics
A sealed can is filled completely with methyl alcohol. Which of these materials could the can be made of so that it would not rupture when the whole system was cooled by 20 degrees Celsius? A.)Aluminum B.)Fused quartz C.)Copper D.)Any of these E.)None of these
Friday, November 23, 2012 at 8:19pm

college algebra--need help please!!
solve the equation in the real number system. 2x^4-23x^3+75x^2-88x+28=0 What are the real solutions of the equations? please show work. I do not know how to work this at all
Friday, November 23, 2012 at 3:40pm

maths
A mass of 350 kg is lifted by 2 cables connecting at the same point as shown. Determine the tensions in each cable when the system is in equilibrium.Left hand cable is t1 at 40 degree angle and Right hand cable is t2 at 30 degree angle
Friday, November 23, 2012 at 3:38pm

Physics
A 14.3 gram bullet embeds itself in a 2.823 kg block on a horizontal frictionless surface which subsequently collides with a spring of stiffness 378 N/m.Â The maximum compression of the spring is 13.5 centimetres. Â a)Â What was the initial ...
Thursday, November 22, 2012 at 11:59pm

chem
2 NO(g) + O2(g) 2 NO2(g) For the reaction above tell whether the reaction would shift to the left (L) or right ® if I a. Increased the total pressure of the system b. Removed O2 from the system c. Increased the amount of NO in the system
Thursday, November 22, 2012 at 8:16pm

Chemistry
The crystal structure of cesium chloride (CsCl) is shown in the figure below. The dark spheres represent atoms of Cl. Identify the crystal system: Cubic Tetragonal Orthorhombic Rhombohedral Hexagonal Monoclinic Triclinic Identify the Bravais lattice: Simple cubic Body ...
Thursday, November 22, 2012 at 4:30am

accounting
Anthony Company uses a perpetual inventory system. It entered into the following purchases and sales transactions for March. Date Activities Units Acquired at Cost Units Sold at Retail Mar. 1 Beginning inventory 170 units @ $52.40/unit Mar. 5 Purchase 260 units @ $57.40/unit ...
Thursday, November 22, 2012 at 12:07am

Physics
Bats can detect small insects that are about equal in size to the wavelength of the sound the bat makes with its echolocation system. A bat emits chirps at a frequency of 17.7kHz. Using the speed of sound as 340m/s, what is the smallest insect the bat can detect?
Wednesday, November 21, 2012 at 11:48am

physics
A 4.00 kg mass and a 3.00 kg mass are attached to opposite ends of a thin 32.2 cm long horizontal rod. The system is rotating at angular speed omega = 4.70 rad/s about a vertical axle at the center of the rod. Determine the kinetic energy K of the system.
Tuesday, November 20, 2012 at 10:11pm

Statistics
According to insurance records a car with a certain protection system will be recovered 90% of the time. Find the probability that 5 of 6 stolen cars will be recovered.
Tuesday, November 20, 2012 at 9:34pm

Math 8R - Operating with Scientific Notation HELP!
Rhode Island is the smallest state. It has an area of approximately 1.55 x10 (to the 3rd power) square miles. Alaska is the largest state. The area of Alaska is 4.28 x 10 (to the 2nd power) times greater than the area of Rhode Island. What is the approximate area of Alaska in ...
Tuesday, November 20, 2012 at 7:59pm

Math 8R: Operating w/ Sci.Notation HELP! (2ND QS)
Yellowstone National Park has an estimated 2.5 x 10 (to the 6th power) visitors each year. The Great Smoky Mountains National Park is the most visited of all the National parks, and it has approximately four times the amount of visitors annually that Yellowstone has. How many ...
Tuesday, November 20, 2012 at 7:59pm

Math 8R - Operating with Scientific Notation HELP!
In constructing the Mall of America in Minnesota, a total of 1.3 x 10 (to the 4th power) tons of steel were used. The Eiffel Tower in Paris, France consist of 7 x 10 (to the 3rd power) tons of steel. About how many times the amount of steel it took to construct the tower did ...
Tuesday, November 20, 2012 at 7:30pm

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