Tuesday

October 21, 2014

October 21, 2014

**Recent Homework Questions About Operating Systems**

Post a New Question | Current Questions

**College Physics**

A 27.7-cm-by-27.7-cm checkerboard has a mass of 103.1 g. There are four 27.7-g checkers located on the checkerboard, as shown in the figure. Relative to the origin located at the bottom left corner of the checkerboard, where is the center of mass of the checkerboard-checkers ...
*Sunday, October 20, 2013 at 9:51pm*

**math 8**

Identify the solution(s) of the system of equations, if any. 5x + 2y = 2 4x - 2y = 8 A) (9/10, -5/4 ) B) (–6, 16) C) (10/9, -16/9 ) D) (10, –24)
*Sunday, October 20, 2013 at 9:41pm*

**math 5**

Identify the solution(s) of the system of equations, if any. 3x+2y=4 5x-4y=3 A) (1, 0.5) B) (0.5,1) C) (5, 5.5) D) 5/11, -2/11)
*Sunday, October 20, 2013 at 9:39pm*

**Math 6**

Identify the solution(s) of the system of equations, if any. -3x-4y=2 8y=-6x-4 A) infinitely many solutions B) (-16/9, 5/6) C) (-2/3, 0) D) no solution
*Sunday, October 20, 2013 at 9:36pm*

**math 4**

Identify the solution(s) of the system of equations, if any. 6x + 2y = 0 y = 1 - 5x A) (–1.5, –0.5) B) (–1.5, 0.5) C) (–0.5, –1.5) D) (0.5, –1.5)
*Sunday, October 20, 2013 at 9:33pm*

**Math 3**

Identify the solution(s) of the system of equations, if any. x + 2y = 6 3x - 6y = 0 A) (3, 2/3) B) (3,3/2 ) C) (2/3, 3) D) (3/2, 3)
*Sunday, October 20, 2013 at 9:32pm*

**Math 1**

Consider the following system of equations. y = 4x - 4 y - 4x = 3 What can you conclude about the system of equations? A) The system of equations is inconsistent. B) The system of equations is dependent. C) The system of equations is independent. D) none of these
*Sunday, October 20, 2013 at 9:31pm*

**math**

Identify the solution(s) of the system of equations, if any. -4x - 4y = 4 4y = -4x - 4 A) no solution B) (0, -1) C) (-1, 0) D) infinitely many solutions
*Sunday, October 20, 2013 at 9:26pm*

**chem thermo**

consider a system consisting of 2.0mol co2(g) initially at 25c and 10atm and confined to a cylinder of cross section 10.0cm2. it is allowed to expand adiabatically against an external pressure of 1.0atm until the piston has moved outwards through a 20cm. assume that co2 is a ...
*Sunday, October 20, 2013 at 12:26pm*

**science**

Now assume that we are working in units such that ℏ=1. If the state of the system at time t=0 is ψ(0)=|0⟩, what is the state of the system at time t=π2? What about at t=π? t=π2:
*Sunday, October 20, 2013 at 11:06am*

**statistics**

Community Health center, a new patient clinic in your town serving only underinsured and uninsured patients, has asked you to help its health information management department get started. calculate the number of new shelving units needed for a medical record filing system ...
*Saturday, October 19, 2013 at 3:41pm*

**Water - Math Question**

This question is related to water footprint calculation. I have no idea how to go about this, if anyone could point me in the right direction, I'd be forever grateful! Background info: The water footprint of the resident of a Blue Sea riparian country (92 million residents...
*Saturday, October 19, 2013 at 3:10pm*

**physics**

A cardiologist uses an ultrasound scanner with an operating frequency of 3.5 MHz that can detect Doppler frequency shifts as small as 0.1 kHz. What is the smallest flow velocity detectable with this device? Two frequencies are given so I know I have to convert the units but ...
*Saturday, October 19, 2013 at 9:31am*

**chem**

A 30.5 g sample of an alloy at 92.4°C is placed into 52.9 g water at 24.1°C in an insulated coffee cup. The heat capacity of the coffee cup (without the water) is 9.2 J/K. If the final temperature of the system is 31.1°C, what is the specific heat capacity of the ...
*Friday, October 18, 2013 at 11:03pm*

**math**

You and your friend are saving for college. You have $50 and are added $10 each week to your savings. Your friend has $20 and he is adding $20 each week to his savings. a. what system of equations would be a good model for this situation? Let x be number of weeks and y be the ...
*Friday, October 18, 2013 at 1:14pm*

**Telecommunications**

1. System A consists of a single ring with 100 stations, one per repeater. System B consists of four 25 stations rings linked by a bridge. If the probability of a link failure is , a repeater failure is , and a bridge failure is , derive an expression for parts (a) to (d). a) ...
*Friday, October 18, 2013 at 10:51am*

**chem**

A 30.5 g sample of an alloy at 90.7�C is placed into 48.8 g water at 22.3�C in an insulated coffee cup. The heat capacity of the coffee cup (without the water) is 9.2 J/K. If the final temperature of the system is 31.1�C, what is the specific heat capacity...
*Thursday, October 17, 2013 at 11:55am*

**math**

the system of linear equations below has a unique solution for all but one value of a : 5 x - 5 y = 25 48 x + a y = 240 What is this exceptional value for a ?
*Thursday, October 17, 2013 at 11:12am*

**Science **

What part of the circulatory system moves the blood through your body?
*Wednesday, October 16, 2013 at 7:17pm*

**Accounting**

The following unadjusted trial balance is prepared at fiscal year-end for Nelson Company. NELSON COMPANY Unadjusted Trial Balance January 31, 2013 Debit Credit Cash $ 26,150 Merchandise inventory 14,500 Store supplies 5,000 Prepaid insurance 2,100 Store equipment 42,800 ...
*Wednesday, October 16, 2013 at 5:51pm*

**algebra 2**

Solve system of equations.Describe each step if your solution. W+X+Y+Z=2 2W-X+2y-Z=1 -W+2x-y+2z=-2 3w+x+y-Z=5 Please help I only know how to do this with 3 equations.
*Wednesday, October 16, 2013 at 4:15pm*

**Business(please help quick!)**

Please don't provide any links. We are doing a project where we pick a sports team and we must calculate the revenue and salaries of the players. Then we are asked to explain how a sports team can possibly lose money. Now, I have all of that but I am stuck on this last ...
*Wednesday, October 16, 2013 at 12:20am*

**Chemistry**

If we ignore the small fraction of U-234, natural uranium has a concentration of 99.28 atom% of U-238 and 0.72% U-235. Their half-lives are, respectively, 4.68*109 and 7.038*108 years. (a) In the future, will the U-238 percentage be higher or lower? (b) In Oklo, Gabon, Africa...
*Tuesday, October 15, 2013 at 9:02pm*

**Algebra 2**

Solve the system. Then classify the system as consistent and independent, consistent and dependent, or inconsistent. 24.) 4x+5y=3 6x+9y=9 26.) 1/2x -3y=10 1/4x +2y=-2
*Tuesday, October 15, 2013 at 6:01pm*

**Algebra 2**

Graph the linear system and estimate the solution. Then check the solution algebraically. 7x+y=-17 3x-10y=24 I have to have 4 labeled points and I'm not getting the fraction thing. Any help would be great!
*Tuesday, October 15, 2013 at 5:58pm*

**Physics**

Consider an ideal spring that has an unstretched length l0 = 3.3 m. Assume the spring has a constant k = 23 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a distance of x0 = 1.6 m from...
*Tuesday, October 15, 2013 at 1:40pm*

**maths**

Write the system as a matrix equation and solve using inverses. x1 + 2x2 - x3 = -3 -2x1 - x2 + 3x3 = 0 -4x1 + 4x2 - x3 = -12 A. x1 = 2, x2 = -3, x3 = 1 B. x1 = 1, x2 = -2, x3 = 1 C. x1 = 1, x2 = -2, x3 = 0 D. x1 = 1, x2 = -3, x3 = 1
*Tuesday, October 15, 2013 at 11:54am*

**maths**

Solve the system. 3x2 - 2y2 = -5 x2 + y2 = 25 A. (3, 4), (3, -4), (-3, 4), (-3, -4) B. (4, 4), (5, 4), (3, -4), (1, –4) C. (-3, 4), (1, 4), (-3, -4), (2, -4) D. (1, 4), (2, –4), (–4, 3), (–3, –3) Find the coordinates of the corner points using the ...
*Tuesday, October 15, 2013 at 11:25am*

**Computer Architecture**

A Silicon Valley company is looking to increase the performance of its workstations. Analysis of the applications that its customers are using has shown that the average response time breaks down into three main categories: CPU time, memory system time, and host/client ...
*Tuesday, October 15, 2013 at 10:30am*

**Chm 2**

The question asks, Consider the following weak acids and their Ka values Acetic acid Ka = 1.8x10^-5 Phosphoric acid Ka = 7.5x10^-3 Hypochlorous acid Ka = 3.5x10^-8 What weak acid-conjugate base buffer system from the acids listed is the best chouce to prepare the following ...
*Tuesday, October 15, 2013 at 12:29am*

**PHYSICS(PLS HELP)**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially...
*Monday, October 14, 2013 at 3:17pm*

**PHYSICS(HELP)**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially...
*Monday, October 14, 2013 at 2:49pm*

**physics**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially...
*Monday, October 14, 2013 at 1:55pm*

**physics**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially...
*Monday, October 14, 2013 at 1:12pm*

**physics **

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially...
*Monday, October 14, 2013 at 12:46pm*

**physics **

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially...
*Monday, October 14, 2013 at 12:46pm*

**physics**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially...
*Monday, October 14, 2013 at 11:48am*

**Physisc(help)**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially...
*Monday, October 14, 2013 at 10:21am*

**biology 2**

The digestive, circulatory, respiratory, immune, and excretory systems all work together to maintain homeostasis. Discuss how a minor malfunction in one of these systems could lead to major malfunctions in others. If methods were developed to improve the efficiency and ...
*Monday, October 14, 2013 at 8:42am*

**physics**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F⃗ = −C1rv⃗ , where C1 is a constant. At time t = 0, a small ball of mass m is projected into a liquid so that it initially...
*Monday, October 14, 2013 at 4:03am*

**Science**

The system of three pulleys is in equilibrium, the pulleys have masses of 9kg ,5kg,8kg respectively. The pulleys are frictionless & massless.find the force T ?
*Monday, October 14, 2013 at 2:44am*

**Science**

Three masses sitting on three pulleys,the masses are 5kg,9kg,8kg.the system is in equilibrium,the pulleys are frictionless & massless
*Monday, October 14, 2013 at 2:28am*

**Physics pls anyone can help me? its urgent**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F = -c_1*r*v , where c_1 is a constant. At time t = 0, a small ball of mass is projected into a liquid so that it initially has a horizontal ...
*Sunday, October 13, 2013 at 8:37pm*

**Physics Urgent please help**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F = -c_1*r*v , where c_1 is a constant. At time t = 0, a small ball of mass is projected into a liquid so that it initially has a horizontal ...
*Sunday, October 13, 2013 at 5:28pm*

**algebra**

identify the solutions of the system of equations x=1 and y=1
*Sunday, October 13, 2013 at 12:03pm*

**physics**

Consider the Hamiltonian H=Z⊗3 acting on 3 qubits. What is the ground energy of the system? (I.e. the lowest eigenvalue of H?) What is the dimension of the ground energy subspace? (I.e. multiplicity of that eigenvalue?)
*Sunday, October 13, 2013 at 11:51am*

**Psychology/ Ms Sue**

Are my answers correct Ms Sue? 1. One of the characteristic features of school-age children is that they are more likely than younger children to try to conform to peer standards in such matters as clothing and language? True 2. School age children have a more elaborate ...
*Saturday, October 12, 2013 at 4:41pm*

**Physics Urgent please help**

Consider an ideal spring that has an unstretched length l_0 = 3.5 m. Assume the spring has a constant k = 36 N/m. Suppose the spring is attached to a mass m = 8 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a distance of x_0 = 1.9 m ...
*Saturday, October 12, 2013 at 4:11am*

**Geography (Ms. Sue)**

1). Some Russians have objected to the creation of new federal districts. Why might there be disagreement over the districts? A: There might be disagreement over the districts because the President of Russia hopes that the heads of the new federal districts will force regional...
*Friday, October 11, 2013 at 9:39pm*

**AP Chemistry**

How much work is done by the system when 2.00 moles of O2 expand from a volume of 3.00 liters to a volume of 9.6 liters against a constant external pressure of 0.0100 atm answer in units of joules
*Friday, October 11, 2013 at 6:23pm*

**physics**

Consider an ideal spring that has an unstretched length l0 = 3.9 m. Assume the spring has a constant k = 20 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a distance of x0 = 1.7 m from...
*Friday, October 11, 2013 at 9:46am*

**physics**

Consider an ideal spring that has an unstretched length l0 = 3.9 m. Assume the spring has a constant k = 20 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a distance of x0 = 1.7 m from...
*Friday, October 11, 2013 at 4:40am*

**Physics**

At low speeds (especially in liquids rather than gases), the drag force is proportional to the speed rather than it's square, i.e., F = -c_1*r*v , where c_1 is a constant. At time t = 0, a small ball of mass is projected into a liquid so that it initially has a horizontal ...
*Thursday, October 10, 2013 at 8:01pm*

**physics**

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 = 17.5 kg and an initial velocity of = 8.50 m/s, due east. Object B, however, has a mass of mB...
*Thursday, October 10, 2013 at 6:27pm*

**accouing**

When sales are constant, but the production level fluctuates, net operating income determined by the variable costing method will:
*Thursday, October 10, 2013 at 6:25pm*

**Physics**

Consider an ideal spring that has an unstretched length l0 = 3.9 m. Assume the spring has a constant k = 20 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a distance of x0 = 1.7 m from...
*Thursday, October 10, 2013 at 3:31pm*

**statistics**

Find the operating characteristics of this system. An airport ticket counter has a service rate of 180 per hour, exponentially distributed, with Poisson arrivals at the rate of 120 per hour
*Thursday, October 10, 2013 at 11:44am*

**physics**

Consider an ideal spring that has an unstretched length l0 = 3.9 m. Assume the spring has a constant k = 20 N/m. Suppose the spring is attached to a mass m = 6 kg that lies on a horizontal frictionless surface. The spring-mass system is compressed a distance of x0 = 1.7 m from...
*Thursday, October 10, 2013 at 10:34am*

**FEEDBACK CONTROL SYSTEM**

Figure below shows the block diagram of a dc-motor control system (note the dc-motor is represented by G(s)= K(s+3)/s(s+1)(s+2).The signal N(s) denotes the frictional torque at the motor shaft. a) Find the transfer function H(s) so that the output Y(s) is not affected by the ...
*Thursday, October 10, 2013 at 4:33am*

**Physics**

A block of mass m1 = 27 kg rests on a wedge of angle θ = 54∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...
*Thursday, October 10, 2013 at 1:35am*

**finance **

Based on data from 1999 to 2001, the net sales (revenue) of Gatorade/Tropicana North America is R(t) = -107t2+496t+3452 million dollars and the operating profit is P(t) = −18.5t2 + 85.5t + 433 million dollars - where t is the number of years since 1999Profit = Revenue &#...
*Wednesday, October 9, 2013 at 10:38pm*

**physics**

You testify as an expert witness in a case involving an accident in which car A slid into the rear of car B, which was stopped at a red light along a road headed down a hill (see the figure). You find that the slope of the hill is θ = 14.0°, that the cars were ...
*Wednesday, October 9, 2013 at 2:15pm*

**physics (elena)**

A block of mass m1 = 28 kg rests on a wedge of angle θ = 47∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...
*Wednesday, October 9, 2013 at 1:05pm*

**finance **

hey i cant figure this out can someone please help me Gatorade/Tropicana North America, a subsidiary of PepsiCo, produces fruit juices and other flavored beverages. Based on data from 1999 to 2001, the net sales (revenue) of Gatorade/Tropicana North America may be modeled by R...
*Wednesday, October 9, 2013 at 12:40pm*

**physics **

A block of mass m1 = 28 kg rests on a wedge of angle θ = 47∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...
*Wednesday, October 9, 2013 at 12:38pm*

**physics**

A block of mass m1 = 28 kg rests on a wedge of angle θ = 47∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...
*Wednesday, October 9, 2013 at 9:56am*

**FEEDBACK CONTROL SYSTEM**

Figure below shows the block diagram of a dc-motor control system (note the dc-motor is represented by G(s)= K(s+3)/s(s+1)(s+2).The signal N(s) denotes the frictional torque at the motor shaft. a) Find the transfer function H(s) so that the output Y(s) is not affected by the ...
*Wednesday, October 9, 2013 at 7:47am*

**PHYSICS**

A block of mass m1 = 28 kg rests on a wedge of angle θ = 47∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...
*Wednesday, October 9, 2013 at 5:38am*

**physics**

A block of mass m1 = 28 kg rests on a wedge of angle θ = 47∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...
*Tuesday, October 8, 2013 at 6:22pm*

**physics**

A block of mass m1 = 28 kg rests on a wedge of angle θ = 47∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...
*Tuesday, October 8, 2013 at 5:47pm*

**physics**

A block of mass m1 = 28 kg rests on a wedge of angle θ = 47∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...
*Tuesday, October 8, 2013 at 3:29pm*

**physics**

A block of mass m1 = 28 kg rests on a wedge of angle θ = 47∘ which is itself attached to a table (the wedge does not move in this problem). An inextensible string is attached to m1, passes over a frictionless pulley at the top of the wedge, and is then attached to ...
*Tuesday, October 8, 2013 at 3:06pm*

**U.S. Government and Politics**

Can anyone help me on this question?? Describe how our Federalist system works in America. /:)
*Tuesday, October 8, 2013 at 8:46am*

**operating system**

A database structure can be changed by?
*Tuesday, October 8, 2013 at 12:07am*

**Math **

THC, the active ingredient in marijuana, is said to have a half-life of about one day. If someone ingests 3 grams of THC, write an equation to represent M, the amount of marijuana in his system when he tested d days later.
*Monday, October 7, 2013 at 6:29pm*

**Algebra, help needed**

I need help I don't know how to solve this system Solve the following system. Show all your work 3x-2y+2z= 30 -x+3y-4z= -33 2x-4y+3z= 42
*Monday, October 7, 2013 at 10:24am*

**Algebra**

I need help I don't know how to solve this system Solve the following system. Show all your work 3x-2y+2z= 30 -x+3y-4z= -33 2x-4y+3z= 42
*Monday, October 7, 2013 at 9:53am*

**Chem**

An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 6635 J. What is the specific heat of the gas?
*Sunday, October 6, 2013 at 9:19pm*

**Chem**

An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 6635 J. What is the specific heat of the gas?
*Sunday, October 6, 2013 at 9:19pm*

**Materials Science & Physics**

Consider a tetragonal phase of which the lattice parameters satisfy c = 2a. Diffusivities of the phase were measured in two different directions as: 6.0x10-12 cm2/sec along [101] and 8.0x10-12 cm2/sec along [001]. (a) Determine the diffusivity tensor (Dij) expressed with ...
*Sunday, October 6, 2013 at 12:58am*

**Civics **

What countries (if there is any) avoid the US's manufacturing because they do not want to switch Imperial system to the metric system?
*Saturday, October 5, 2013 at 7:55pm*

**Civics or S.S**

What countries (if there is any) avoid the US's manufacturing because they do not want to switch Imperial system to the metric system? Thanks for the help! ~Kimmy
*Saturday, October 5, 2013 at 7:10pm*

**CONTROL SYSTEM**

HELP,PLS HELP..I NEED ANSWER FOR ECEN 4413 AUTOMATIC CONTROL SYSTEMS SPRING 2005 MIDTERM EXAM..I CANNOT FIND ANSWERS IN THE INTERNET.PLS HELP IF YOU KNOW WHERE TO DOWNLOAD THE SOLUTION MANUAL..OR YOU KNOW THE ANSWER!!THANK YOU
*Saturday, October 5, 2013 at 5:38am*

**Math**

A paddle on an antique windmill needs to be visually inspected by a repairmen while the windmill is operating. The paddle can be seen by the repairman when it is at a height of 1.9m on its downward path. If the height of the paddle can be represented by the function, y=1.2764 ...
*Friday, October 4, 2013 at 3:59pm*

**Algebra**

Which ordered triple is a solution of this system? 2x+y-z=7 -x-2y+4z=-15 x+2y=5z=17 (-2, 6, -5) (1, 3, 2) (2, 5, -2) (3, 1, 0)
*Friday, October 4, 2013 at 12:30pm*

**Algebra**

What is the value of x in the solution of this system? -3x-y+2z = 7 2y+z= -5 3x+6y= -21 4 2 1 3
*Friday, October 4, 2013 at 12:26pm*

**Thermodynamics**

The initial state consists of a closed system containing one mole of water (liquid) at 85°C and 1 atmosphere pressure. The immediate surroundings are also at 85°C and 1 atmosphere pressure. The change in state is described as this one mole of liquid forming vapor at 85...
*Thursday, October 3, 2013 at 3:33pm*

**physics**

In the apparatus shown in the figure (Figure 1) , m1 = 10kg and the coefficients of static and kinetic friction between m1 and the table are 0.69 and 0.32, respectively. Part A What mass of m2 will just barely set the system in motion?
*Thursday, October 3, 2013 at 3:13pm*

**Electricity and Electronics**

1. A transformer has a primary voltage of 115 V and a secondary voltage of 24 V. If the number of turns in the primary is 345, how many turns are in the secondary? A. 8 B. 690 C. 72 D. 1,653 2. To use your left hand to determine the direction of the voltage developed in a ...
*Thursday, October 3, 2013 at 1:47pm*

**Health**

Which of the following lipoproteins carries dietary fat that is absorbed into the digestive system to the liver and body cells for use? a. Chylomicrons b. High density lipoprotein c. Micelle d. Low density lipoproteins I think its A is that correct?
*Wednesday, October 2, 2013 at 7:23pm*

**Science- Ms. Sue or DrBob222?**

A student measures a rectangular room to be 20.0 m X 17.16 m. Which of the numbers below represents the room’s area with the correct number of significant figures? a. 340 m^2 b. 343 m^2 c. 343.2 m^2 d. 343.20 m^2 B Which component of the technological system is activated ...
*Wednesday, October 2, 2013 at 3:48pm*

**Science**

A student measures a rectangular room to be 20.0 m X 17.16 m. Which of the numbers below represents the room’s area with the correct number of significant figures? a. 340 m^2 b. 343 m^2 c. 343.2 m^2 d. 343.20 m^2 B Which component of the technological system is activated ...
*Wednesday, October 2, 2013 at 12:32pm*

**Science**

Why do scientists use models of natural systems? a. Scientists use models of natural systems because these systems are often too large, too small, or too complex to study directly. b. Scientists use models of natural systems because they like to use art in science. c. ...
*Wednesday, October 2, 2013 at 12:01pm*

**History!! **

PLEASE PLEASE PLEASE HELP ME!! <3 1. Which of the following describes the role of an anthropologist? (1 point) a person who studies the origin and development of humans*** a person who searches for artifacts from prehistoric people a person who excavates remains from early ...
*Tuesday, October 1, 2013 at 2:39pm*

**History! **

***IGNORE THE CHARTS/GRAPH QUESTIONS!! UNLESS YOU KNOW THE ANSWER OR HAVE SEEN THE CHARTS! THANKS!! :) *** For whom was South Carolina named? (1 point) Queen Caroline King Charles I**** King Charles II Queen Elizabeth 2. What is an important reason to study the history of a ...
*Tuesday, October 1, 2013 at 9:49am*

**physics**

A block of mass m1 = 13.5 kg rests on a wedge of angle θ = 27∘ placed over a table.. An inextensible string is attached to Block M1, passes over a frictionless pulley at the top of the wedge, and is then attached to another block of mass M2 = 3 kg. The coefficient ...
*Tuesday, October 1, 2013 at 2:15am*

**science please help**

Also why don't we accept the Metric System as it in now used in other countries?
*Monday, September 30, 2013 at 7:57pm*

**Science**

Which statement best describes the relationship between science and technology? A. The goal of science is to gain an understanding of the natural world, while the goal of technology is to use that understanding to improve people's lives. B. The goal of science is to create...
*Monday, September 30, 2013 at 7:54pm*

**AP Chemistry**

What would be the final temperature of the system if 20 g of lead at 100◦C are dropped into 20 g of water at 30 ◦C in an insulated container?
*Monday, September 30, 2013 at 4:34pm*

**Math (College Pre-Cal)**

The exact conversion between the English measurement system and the metric system is given by the equation 1 inch= 2.54 cm. Let f(x) be the number of miles in x meters. Find a formula for f(x). Give an exact answer.
*Sunday, September 29, 2013 at 11:06pm*

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