Friday

May 6, 2016
**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 by Anonymous*

**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 by Anonymous *

**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 by Madison*

**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 by KS*

**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 by KS*

**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 by Cali franco*

**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 by Anonymous*

**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 by Wack*

**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 by Cali franco*

**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 by Andrew *

**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 by Madison*

**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 by Help me please*

**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 by Kristin*

**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 by Kareemah*

**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 by Alex*

**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 by Lia*

**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 by XenaGonzalez*

**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 by Barbecue *

**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 by Nomy*

**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 by Amy*

**system analysis and designs**

what is form . explain form design methodlogy?
*Tuesday, April 21, 2015 by priyanka jain*

**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 by YOLO*

**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 by XenaGonzalez*

**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 by Cali franco*

**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 by Thomas*

**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 by Thomas*

**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 by Hailee*

**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 by Hailee*

**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 by thabo*

**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 by Hailee*

**troduction to computer**

you call the help desk to report a problem you are having on your computer. The technician asks you what operating system you are running . you know it is windows 7 but you forget which version. how can you find out
*Friday, April 17, 2015 by Anonymous*

**PRE - CALCULUS**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x-y+3z = 12 x+4y+6z =-32 5x+3y+9z = 20 ...... I NEED HELP WITH THE OTHER TWO PLEASE :) 4 -1 3 | 12
1 4 6 | -32
5 3 9 | 20 1 0 0
...
*Friday, April 17, 2015 by Ciara*

**pre-calc - JAI**

Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2
*Friday, April 17, 2015 by Ciara*

**HELP PLEASE**

Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2
*Thursday, April 16, 2015 by Ciara*

**Interaction of Forces**

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 ...
*Thursday, April 16, 2015 by Anonymous*

**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 5.1 liters against a constant external pressure of 0.0100 atm? Answer in units of J. I get w=-p(deltaV) but what about moles?
*Thursday, April 16, 2015 by Alex*

**pre-calc**

Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2
*Thursday, April 16, 2015 by Ciara*

**pre-calc**

Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2
*Thursday, April 16, 2015 by Ciara*

**Chmistry**

pcl3(g) cl2(g) ¨ <--- pcl5(g) Energy Some PCl3 and Cl2 are mixed in a container at 200 degrees celius and the system reaches equilibrium according to the equation above. Which of the following causes and increase in the number of moles of PCl5 present at ...
*Thursday, April 16, 2015 by Marie*

**pre-calc**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. x+4y+6z =-32 5x+3y+9z = 20
*Thursday, April 16, 2015 by Ciara*

**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? Frequency and wavelength Wavelength and wave speed Amplitude and wavelength Amplitude and frequency 2. Sound proof rooms...
*Thursday, April 16, 2015 by Hailee*

**pre-calc **

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x-y+3z = 12 x+4y+6z =-32 5x+3y+9z = 20
*Thursday, April 16, 2015 by Ciara*

**Physics**

A 1100- kg car collides with a 1400- kg car that was initially at rest at the origin of an x-y coordinate system. After the collision, the lighter car moves at 20.0 km/h in a direction of 25 o with respect to the positive x axis. The heavier car moves at 23 km/h at -50 o with ...
*Thursday, April 16, 2015 by Thomas*

**math**

given the equation -3x +2y =4, Write another equation that will form a linear system with: one solution, no solution and infinite solution. infinite solution: (-3x +2y =) * 3 -> -9x +6y =12 y=3/2x+4 -9x +6y =12 I think we have to multiple the first equation by non-zero ...
*Thursday, April 16, 2015 by Jay*

**Science**

Problem How could renewable energy sources be used in a house? Devise a Plan 1. Consider what you learned about renewable energy sources. Use what you learned to design a house that operates entirely on renewable energy sources. Focus on three major needs: (1) heating and ...
*Thursday, April 16, 2015 by Priscilla*

**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? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof ...
*Thursday, April 16, 2015 by Andrew*

**pre - CALCULUS**

Solve the system of equations using matrices. Use Gaussian elimination with back- substitution. x+y+z = -5 x-y+3z = -1 4x+y+z = -2
*Wednesday, April 15, 2015 by Ciara*

**pre - CALCULUS**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x-y+3z = 12 x+4y+6z =-32 5x+3y+9z = 20
*Wednesday, April 15, 2015 by Ciara*

**math -check**

given the equation -3x +2y =4, Write another equation that will form a linear system with: one solution, no solution and infinite solution. Graph the linear using graphing calculator and write your window setting in the format x: Xmin, xmax, Xscl. Y: Ymin, Ymax, Yscl Please ...
*Wednesday, April 15, 2015 by Jay*

**physics**

A 15-kg block is on a frictionless ramp that is inclined at 20° above the horizontal. It is connected by a very light string over an ideal pulley at the top edge of the ramp to a hanging 19-kg block, as shown in the figure. The string pulls on the 15-kg block parallel to ...
*Wednesday, April 15, 2015 by Mazdaly*

**pre - CALCULUS**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x-y+3z = 12 x+4y+6z =-32 5x+3y+9z = 20
*Wednesday, April 15, 2015 by Ciara*

**POL201 American National Government**

Question 1.1. Despite the greater federal authority in the federal relationship, federalism is still important for all the following reasons except that (Points : 1) it provides the best means of developing a vast country because it allows for experimentation. it may ...
*Wednesday, April 15, 2015 by Savannah*

**pre - CALCULUS**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. Show your work. 4x-y+3z = 12 x+4y+6z =-32 5x+3y+9z = 20
*Wednesday, April 15, 2015 by Ciara*

**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? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof ...
*Wednesday, April 15, 2015 by Lisa*

**math**

Given the equation - 3x +2y =4. Write another linear equation that will form a linear system with exactly one solution? I usually try to answer b4 i ask question But this time i'm really stuck. plz help ?
*Wednesday, April 15, 2015 by Jay*

**law**

what are some examples of successful or unsuccessful criminal justice system services
*Tuesday, April 14, 2015 by sharday*

**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? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof ...
*Tuesday, April 14, 2015 by Hailee*

**pre - CALCULUS**

Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0
*Monday, April 13, 2015 by Ciara*

**Pre - CALCULUS**

Solve the system by the substitution method. Show your work. 2y - x = 5 x2 + y2 - 25 = 0
*Monday, April 13, 2015 by Ciara*

**PHY 113**

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...
*Monday, April 13, 2015 by Austin*

**Science **

Which sphere of the Earth system contains nearly all of Earth's mass? A. the geosphere B. the atmosphere C. the biosphere D. the hydrosphere
*Monday, April 13, 2015 by Deazzy*

**physics**

A block of mass M1 = 15 kg is lying on a horizontal friction-less surface is connected to a string passing over a friction-less pulley. A mass of M2 = 25 kg is hanging at its other end as shown in the figure below. (i) Find the acceleration in the masses. (ii) What is the ...
*Monday, April 13, 2015 by trei-sha*

**Physics**

You have 250 g of water in an aluminium calorimeter with a mass of 125 g. How long will it take to increase the temperature of the water and calorimeter from 20C to 37C if the system is heated by a resistive heating element with 8 V across the resistor and 0.75 A flowing ...
*Sunday, April 12, 2015 by Anna*

**MATH**

5x-4y= -3 2x + 7y= 5 How to solve this linear system shown above by using elimination strategy ? (5x-4y= -3) *2 ->10x - 12y= 6 (2x + 7y= 5) *5 -> 10 +35y= 25 ___________________________________________ -47y = -19 y = -19/47 10x - 12y= 6 10x - 12(0.4) = 6 10x -4.8=...
*Sunday, April 12, 2015 by td*

**physics**

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...
*Sunday, April 12, 2015 by promise*

**Physics**

A uniform, 274-N rod that is 2.05m long carries a 225-N weight at its right end and an unknown weight W toward the left end.When W is placed 50.3cm from the left end of the rod, the system just balances horizontally when the fulcrum is located 78.0cm from the right end. i ...
*Sunday, April 12, 2015 by Robin *

**pre - CALCULUS**

Use Gaussian elimination to find the complete solution to the system of equations, or state that none exists. x + y + z = 9 2x - 3y + 4z = 7 x - 4y + 3z = -2 A. {(-7z/5+34/5 ,2z/5 +11/5 , z)} b. {(- 7z/5+34/5 , 2z/5- 11/5 , z)} c . {( z/5+ 34/5 , 2z/5+11/5 , z)} C?
*Saturday, April 11, 2015 by Ciara*

**Pre - CALCULUS**

Use Cramer's rule to solve the system. 2x + 4y - z = 32 x - 2y + 2z = -5 5x + y + z = 20 A. {( 1, -9, -6)} B. {( 2, 7, 6)} C. {( 9, 6, 9)} D. {( 1, 9, 6)} d ?
*Saturday, April 11, 2015 by Ciara*

**pre - CALCULUS**

Use Cramer's rule to determine if the system is inconsistent system or contains dependent equations. 2x + y = 8 6x + 3y = 24 A. system is inconsistent B. system contains dependent equations b ?
*Saturday, April 11, 2015 by Ciara*

**pre - CALCULUS**

Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets. x + y = -8 x - y = 14 A. {( 3, -11)} B. {( 3, 11)} C. {(x, y) | x + y = -8} D. ∅ B?
*Saturday, April 11, 2015 by Ciara*

**business mgmt**

A company looking for venture capitalist funding is deciding on the design of its operating system for its new phone. The first option is to simply buy the OS from another company. This would result in sales of either 10,000 units if the market is not crowded with similar ...
*Saturday, April 11, 2015 by jeannie*

**math**

How to use an elimination strategy to solve the linear system: 5/3x +1/4y = 10 1/3x + 1/2y = 5
*Friday, April 10, 2015 by lyn*

**math - plz help!!**

How to write three linear system that are equivalent to the linear system shown? 5x-4y= -3 2x + 7y= 5
*Friday, April 10, 2015 by lyn*

**science ms sue plz help**

1. Which layer of the sun's atmosphere are you looking at when you look at an image of a sun? A) Photosphere B) Chromosphere C) Corona D) Prominence 2. What materials could have been found in a giant cloud that formed the solar system? A- hydrogen and helium B- hydrogen ...
*Friday, April 10, 2015 by need help plz*

**math/physics**

A 8 kg mass is attached to a spring hanging from the ceiling and allowed to come to rest. assume that the spring constant is 40 n/ m and a damping constant is 3 N/m. At t=0 and external force of 2 sin(2t+PI/4)N is applied to the system. determine amp, frequency and steady ...
*Friday, April 10, 2015 by Frank*

**math - hw help. plz**

How to I solve this linear system using method of substitution? 1/4x + 1/2y = -5/12 2x - y = -4/3
*Friday, April 10, 2015 by TD*

**sdsu**

BurrAnd Company estimates that annual manufacturing overhead costs will be $600,000. Estimated annual operating activity bases are: direct labor cost $500,000, direct labor hours 50,000, and machine hours 100,000. Compute the predetermined overhead rate for each activity base...
*Thursday, April 9, 2015 by nanda*

**Math Check**

Hi! I need help with this one problem. My teacher told me that I could use any method to solve the following system and this is the answer I got; (1/2,2/5). Is this correct? 0.15r + 0.85s = 0.23 0.20r + 1.25s = 0.33 Write answer in (r, s).
*Thursday, April 9, 2015 by Lilly*

**math**

How to write three linear system that are equivalent to the linear system shown? 5x-4y= -3 2x + 7y= 5
*Thursday, April 9, 2015 by Lyn*

**math**

What is the value of x in the system shown? y=1/5x+2 y=x-4
*Thursday, April 9, 2015 by Lyn*

**math**

What is the value of y in the system shown? y=12x-3 y=-2x+4 Thanks
*Thursday, April 9, 2015 by Lyn*

**Math**

Solve this system that is represented by the following matrix. [1 -2 -2| -3 0 5 3| 13 0 0 1| 1] Write answer in (x, y, z)
*Wednesday, April 8, 2015 by Sally*

**Science**

18. The human immune system produces ______________ in response to a vaccine, which later can bind to and destroy a pathogen if it invades. (1 point)
*Wednesday, April 8, 2015 by Charity *

**math**

write a system of equations that is not linear and graph. can this work equation work? 3x+2y=12 3x+2y=6 1. 3x+2y=12 y=-3/2x + 6 2. 3x+2y=6 y = =3x/2+3 when i graph it will be parallel.
*Wednesday, April 8, 2015 by TJ*

**plz help science**

1. Which layer of the sun's atmosphere are you looking at when you look at an image of a sun? A) Photosphere B) Chromosphere C) Corona D) Prominence 2. What materials could have been found in a giant cloud that formed the solar system? A- hydrogen and helium B- hydrogen ...
*Wednesday, April 8, 2015 by bmx*

**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? Frequency and wavelength Wavelength and wave speed***** Amplitude and wavelength Amplitude and frequency 2. Sound proof ...
*Wednesday, April 8, 2015 by Hailee*

**Chemistry**

A coffee cup calorimeter contains 100.0 g of water at 10.0 ◦C. A 72.4 g sample of iron is heated to 100 ◦C and dropped into the calorimeter. Assuming there is no heat lost to the coffee cup, calculate the final temperature of the system. The specific heats of iron ...
*Tuesday, April 7, 2015 by kika*

**social studies**

1) Diversity most closely means (1 point) a. sharing cultural traits and practices with others. ** b. making up a whole of many different parts. c. being a member of a small ethnic group. d. having many similar regions next to one another. 2) How does life in Istanbul differ ...
*Tuesday, April 7, 2015 by Leala*

**sience plz hep**

1. Which layer of the sun's atmosphere are you looking at when you look at an image of a sun? A) Photosphere B) Chromosphere C) Corona D) Prominence 2. What materials could have been found in a giant cloud that formed the solar system? A- hydrogen and helium B- hydrogen ...
*Tuesday, April 7, 2015 by bmx*

**criminal justice**

could someone please let me know where I can find this type of question to read. discuss three key aspects of the school shootings that the court system has addressed so far. Thank you very much Mary Ann
*Tuesday, April 7, 2015 by Mary Ann *

**physics**

A 13.1-g bullet is fired into a block of wood at 261 m/s. The block is attached to a spring that has a spring constant of 205 N/m. The block and bullet continue to move, compressing the spring by 35.0 cm before the whole system momentarily comes to a stop. Assuming that the ...
*Tuesday, April 7, 2015 by heltor*

**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.
*Tuesday, April 7, 2015 by happy*

**Science**

1. What do bone marrow (the soft connective tissue that fills the internal spaces in bone) and the dermis (layer of the skin under the epidermis and over the hypodermis) have in common? (1 point) • They are both sites of new cell formation. • They both contain or are...
*Tuesday, April 7, 2015 by Kiara*

**math**

If it says use the method of substitution to solve the system of linear equations 3a=6-b 3a=4-b How do i find the solution
*Tuesday, April 7, 2015 by Rashad *

**math**

In a car repair shop there are 50 cars to be repaired . It is estimated that 23 of that cars need new brakes , and 34 of that cars need to repair the exhaust system . a. How many cars are in need of repair at least two? b . What most cars that are not in need of repair both?
*Tuesday, April 7, 2015 by Iman*

**American History**

The reason that the President is called the Commander-in-Chief in the Constitution is because the Framers wanted ***to provide the President with authority over the secretary of defense. Question 2. Question : Thomas Jefferson justified the Louisiana Purchase on the grounds ...
*Monday, April 6, 2015 by POL201*

**Writing Skills, Part 3**

6. You have found an article in the Readers' Guide that you want to locate. What information would be least important in finding it? A. Subject heading B. Volume and page numbers C. Author's name D. Title of the article Student Answer: B Answer: Incorrect Reference: 7...
*Sunday, April 5, 2015 by yes help me I'm an idiot*

**phy111**

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...
*Sunday, April 5, 2015 by tk*

**chemistry**

A 100 w lightbulb is place in a cylinder equipped with a moveable piston. The ligshtbulb is turned on for 0.015 hours, and the assembly expands from initial volume of 0.85 L to a final volume of 5.88 L against an external pressure of 1.0 atm. Use the wattage of the lightbulb ...
*Saturday, April 4, 2015 by Ebimobowei*

**Law**

Describe the role of the court in Australia's legal system.
*Saturday, April 4, 2015 by Help Needed. *