Wednesday

February 10, 2016
Total # Posts: 1,518

**chemistry**

4NH3 + 5O2 → 4NO + 6H2O 2NO + O2 → 2NO2 3NO2 + H2O → 2HNO3 + NO In this process, the NO made in the last reaction is recycled back into the second reaction and used as a reactant. In the end, all of the NO produced is recycled back so that when the ...
*September 29, 2011*

**Algebra I**

How do you solve the following literal equation: xp + yp = z
*September 29, 2011*

**science[physics]**

why is the pressure more on ground when a person is walking than when he is standing ?
*September 28, 2011*

**math**

i guess it's 8000
*September 27, 2011*

**math**

What is the interest amount on $1,800 for a year at 1/2%
*September 27, 2011*

**math**

how to divide 7 over 35?
*September 26, 2011*

**Physics**

Units count. Show all steps, not just the numerical substitutions. Show the equations you used. No information is missing. A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.) how long the ball is ...
*September 26, 2011*

**Physics**

A person throws a ball upward into the air with an initial velocity of 15.0 m/s. Calculate the following: a.) how high it goes. b.) how long the ball is in the air before it comes back to his hand. c.) at what time(s) will the ball pass a point 8.00 m. If you got multiples ...
*September 26, 2011*

**intermediate 111**

Wilson Corporation began operations in January 2008, and purchased a machine for $20,000. Wilson uses straight-line depreciation over a four-year period for financial reporting purposes. For tax purposes, the deduction is 50% of cost in 2008, 30% in 2009, and 20% in 2010. ...
*September 21, 2011*

**algebra**

raise the quantity in parenthesis to the indicated exponent and simplify. (-16x^-2y^3)^2 __________ 80x^-2y^3
*September 21, 2011*

**Physics**

The speed limit on a particular freeway is 28.0 m/s (about 101 km/hour). A car that is merging onto the freeway is capable of accelerating at 5.50 m/s2. If the car is currently traveling forward at 13.0 m/s, what is the shortest amount of time it could take the vehicle to ...
*September 19, 2011*

**calculus**

0,-1/2
*September 19, 2011*

**physics**

a driver of a car traveling at 15.6 m/s applies the brakes causing a uniform deceleration of 2.1 m/s squared. how long does it take the car to accelerate to a final speeed of 10.9 m/s. answer in units of seconds
*September 18, 2011*

**physics **

a car enters the freeway with a speed of 5.6 m/s and accelerates uniformly for 2.7 km in 3.0 minutes.How fast is the car moving after this time? answer in units of m/s
*September 18, 2011*

**physics**

turner's treadmill starts with a velocity of -3.4 m/s and speeds up at regular intervals during a half hour workout. after 26 minutes the treadmill has a velocity of -7.6 m/s. what is the average acceleration of the treadmill during this period? answer in units of m/s ...
*September 18, 2011*

**physics**

a car accelerates uniformly from rest to a speed of 21.8 km/h in 5.9 seconds.find the distance it travels during this time. answer in units of meters
*September 18, 2011*

**AP Calculus AB**

If y = (((3x^2)+ 5)^5)((x+2)^4), then dy/dx = ? I've gotten to the point where i have (5((3x^2)+ 5)^4)(4(x+2)^3)(6x), what do i do next? It's a multiple choice question anf this is not one of the answers listed. Any help would be appreciated. Thanks!
*September 18, 2011*

**PALO VERDE **

SIMPLIFY [4 -1] + [-1 2] OVER [2 5] + [-2 -3]
*September 14, 2011*

**childcare**

The main difference between emergency care and first aid is the
*September 13, 2011*

**math**

polynomials (m + 7)(m - 3) + (m-4)(m+5)
*September 13, 2011*

**statistics**

A salesperson finds that, in the long run, two out of five sales calls are successful. Twelve calls are to be made. Let X = the number of concluded sales. Is X a binomial random variable? Explain!
*September 12, 2011*

**math**

arrange the following from least to greatest 3/8,2/4,6/9,9/12
*September 9, 2011*

**Mathematics optimization**

The arithmetic mean of two numbers a and b is the number(a+b)/2. Find the value of c in the conclusion of the mean-value theorem for f(x)=x^2 on any interval [a,b].
*September 3, 2011*

**physics**

nevermind!! i figured it out!
*September 1, 2011*

**physics**

Four vectors, each of magnitude 89 m, lie along the sides of a parallelogram. The angle between vector A and B is 77◦. A 89 m C 89 m B 89 m D 89 m What is the magnitude of the vector sum of the four vectors? Answer in units of m I got 346.8757431m, but that's not ...
*September 1, 2011*

**algebra**

6y+13=
*August 30, 2011*

**physics**

A body at rest is given an initial uniform acceleration of 8m/s2 for 30s after which the acceleration is reduced to 5m/s2 for the next twenty seconds. The body maintains the speed attained for 60s, after which it is brought to rest in 20s. 1. Draw the velocity time graph of ...
*August 28, 2011*

**com/170**

review the evaluatio paragraph on p.179 of the text. Identify what the author did well and what the author could hae done better.
*August 16, 2011*

**com/170**

review the evaluatio paragraph on p.179 of the text. Identify what the author did well and what the author could hae done better.
*August 16, 2011*

**Calculus**

A pipe in the shape of a right-angle elbow contains a vertical section and a horizontal section with a valve at the right angle. Presently the valve is closed and the vertical section of the pipe contains a column of water having length L. When the valve is opened, the amount ...
*August 7, 2011*

**Physics**

A ray of light falls on one of two plane mirrors placed at an angle of 90 degrees. show that the direction of the ray after two reflections is parallel to the direction of the original ray.
*July 22, 2011*

**Physics**

A lady looks at herself in a concave makeup mirror whose radius is 80cm.One of her eyes is on the axis of the mirror,16cm in front of the vertex.(a)Find the position and magnification of the image of the eye.(b) Is the image real or virtual?erect or inverted?
*July 22, 2011*

**Calculus**

Thank you and sorry I typed it wrong "a" is y
*July 21, 2011*

**Calculus**

3 numbers x y and z are to bea randomly chosen between 0 and 1. A What is the probability that X + y + z will be less than 1? B What is the probability that both x+ y<1 and 1<x+a Try your best and... Thanks alot!
*July 21, 2011*

**Intro to calc**

Sorry the last one had too many typos... Three numbers x y and z are to be randomly chosen between 0 and 1. A) What is the probability that X + y + z will be less than 1? B) What is the probability that both x+ y + z <1 and 1< x+y Try your best and... Thanks alot!
*July 20, 2011*

**Intro to calc**

3 numbers x y and z are to bea randomly chosen between 0 and 1. A What is the probability that X + y + z will be less than 1? B What is the probability that both x+ y<1 and 1<x+a Try your best and... Thanks alot!
*July 20, 2011*

**com 156**

need help with writing a thesis statement on renting an apartment is better than buying a house.
*July 19, 2011*

**physical science**

Pursley*
*June 30, 2011*

**physical science**

P!nk. Don't be mean. Bob parsley was just trying to help. He's right. The reason being is because when the force is in the same path as direction work is done. Although, if friction is involved the energy converts to heat and energy is lost. Therefore, work is not ...
*June 30, 2011*

**College Physics**

6. A tall bald student (height 2.1 meters and mass 93.1 kg) decides to try bungee jumping from a bridge. The bridge is 36.7 meters above the river and the "bungee" is 25.3 meters long as measured from the attachment of the bridge to the foot of the jumper. Treat the...
*June 29, 2011*

**College Physics**

1. A spring gun is made by compressing a spring ina tube and then altching the spring at the compressed position. A 4.97-g pellet is placed against the compressed and latched spring. The spring latches at a compression of 4.06 cm, and it takes a force of 9.12 N to compress the...
*June 29, 2011*

**alg II**

How do you solve this equation? 2cos(pi*x) = 4x = 5
*June 15, 2011*

**geometry**

Point P has coordinates of (-11,2) and the circle C has the equation of (x-1)squared + (y-2)squared = 36. How do I caculate Point A?
*June 3, 2011*

**Math**

you go to sunland dont you?
*May 31, 2011*

**Chemistry**

Is this is food calories?
*May 25, 2011*

**Chemistry**

Thank you so much!!! You're really a lifesaver!
*May 25, 2011*

**Chemistry**

Oh nevermind you put it there. THANK YOU SO MUCH! You're a huge help!!!
*May 25, 2011*

**Chemistry**

What's the constant for water though? Every time I look it up it's a different number
*May 25, 2011*

**Chemistry**

Calculate how much heat 32.0 g of water absorbs when it is heated from 26.0°C to 73.5°C. In joules, and then we have to calculate calories too, how is that done? I was absent. Thanks so much!
*May 25, 2011*

**Chemistry**

A 22.0 g piece of aluminum at 0.0°C is dropped into a beaker of water. The temperature of the water drops from 92.0°C to 77.0°C. What quantity of heat energy did the piece of aluminum absorb? Please Help, I'm so lost :( Thank you
*May 25, 2011*

**Chemistry**

THANK YOU!!!!!!
*May 25, 2011*

**Spanish**

Podemos alquilar dos peliculas I need to answer this using direct object pronouns.
*May 22, 2011*

**Math**

Hi, my name is Jane:). Math is my worst subject ever, so it surprised me how I'm in the advanced class! The teacher doesn't exactly explain things well and I'm not easily understanding the lessons. He told me if I don't turn in this packet we'll have ...
*May 18, 2011*

**sociology**

Hi This is my essay question Please can you read my essay below and critque it. "Durkheim argues that society is held together by sets of norms which are transmitted to us by social institutions like the family and schools, and that this process fundamentally shapes our ...
*May 17, 2011*

**Sociology**

Hi can someone help me I am battling to understand Durkheims concepts, I need to define his concepts and then intergrate it with one of my life experiences in education, religion and family.
*May 16, 2011*

**math**

how do you know that (x-2x)/(x+1) is a hyperbola? Thank you!
*May 13, 2011*

**Sociology**

Hi This is my essay question and I dont know how to start this essay I am not sure what is required of me, Please help. "Durkheim argues that society is held together by sets of norms which are transmitted to us by social institutions like the family and schools, and that...
*May 12, 2011*

**Geometry**

2 equal circles in rectangle. if area of rectangle is 50 cm squared, wht is the radius in cm of each circle?
*May 9, 2011*

**enhancing children's self esteem**

5. Of the following who is the most important influence on children's self referent thought? a. Friends b. Teachers c. Themselves D FAMILY 6. Most often during adolescense, a child is least likely to approach which of the following for support of his or her self esteem a. ...
*May 8, 2011*

**trig**

ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help AB = 23 CM
*May 5, 2011*

**trig**

ABC is rightangled triangle. AD is the bisector of angle BAC. Angle DAC=15 degrees. X=CD. Find X. I know the answer is 7.1 but do not know how to do the actual sum. Can you please help.
*May 5, 2011*

**maths**

Trigonometry query. ABC is a rightangled triangle. AD is the bisector of angle BAC. Angle DAC = 15 degrees. X = CD. find X. I know the answer is 7.1 but cannot work out the theory. Could you please help? Thankyou.
*May 5, 2011*

**calculus**

Find or evaluate the following integral. csc^2 3x dx
*May 4, 2011*

**psychology**

The answer man's answers are definitely correct!! I kust took the test and got them all right.
*May 4, 2011*

**chemistry**

what is the reagent responsible for the formation of hydrogen sulfide?
*May 4, 2011*

**Finance**

midland chemcial is negotating a loan from manhattan bank and trust. the small chemical company needs to borrow 500,000. the bank offers a rate of 81/4 percent with a 20 percent compensating balance requirement, or as an alternative, 93/4 percent with additional fees of 5,500 ...
*May 1, 2011*

**probability**

Ryan spent a dollar on a Tri-State Megabucks ticket, enticed by a big jackpot. Ryan chose six different numbers from 1 to 40, inclusive, hoping that hey would be the same numbers draw later by lottery officials. Sad to say, none of Ryan's choices were drawn. What was the ...
*April 30, 2011*

**math**

Consider the cubic graph y = 3x^2 − x^3. (a) Write 3x^2 − x^3 in factored form. (b) Use this form to explain why the graph lies below the x-axis only when x > 3, and why the origin is therefore an extreme point on the graph. I mostly need help with what an ...
*April 22, 2011*

**math**

thank you! for part c I got 1-i but for part b, am I supposed to use the answer i got in part a to answer the question?
*April 22, 2011*

**math**

Express all the solutions to the following equations in a + bi form: (a) z^2 +2z+4 = 0 (b) z^3 −8 = 0 [Hint: z^3 −8 = (z−2)(z^2 +2z+4)] (c) 2z+iz = 3−i thank you!
*April 22, 2011*

**precalculus**

find an example of an even function f that has the addition property that f (x+15) is odd. Thanks
*April 21, 2011*

**math**

factor: 2x^3 - x^2 - 162x + 81 and could you show steps as well? thanks Thank you
*April 21, 2011*

**math**

factor: 2x^3 - x^2 - 162x + 81 and could you show steps as well? thanks Thank you
*April 21, 2011*

**help!**

find the POINT on the line 6x+7y-5=0 which is closest to the point (2,2)
*April 20, 2011*

**optimization**

The manager of a large apartment complex knows from experience that 110 units will be occupied if the rent is 322 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 7 dollar increase in rent. Similarly, one ...
*April 20, 2011*

**math**

factor: 2x^3 - x^2 - 162x + 81 Thank you
*April 19, 2011*

**calculus**

find the point on the line 6x+7y-5=0 closest to (2,2)
*April 18, 2011*

**Chemistry**

How many moles of aluminum oxide can be produced from 12.8 moles of oxygen gas (O2) reacting with excess aluminun (Al)? useing this equation: ---- I dont get how to do these? 4Al(s) + 3O2--> 2Al2O3(s)
*April 14, 2011*

**Chemistry**

How many moles of silver nitrate are needed to produce 6.75 moles of copper nitrate (CU(NO3)2) upon reaction with excess copper by useing this equation: 2AgNO3(Aq) + Cu (s)-->2Ag(s)+Cu(NO3)2 (AQ)
*April 14, 2011*

**Chemistry**

How many grams of water will be produced if 32.0 g of nitrous oxide are also produced in the reaction? useing this equation: NH4NO3 (s)--> N2O (g) + 2H2O (g)
*April 14, 2011*

**Chemistry**

Use the equation to determine what volume of nitrous oxide can be produced from the decomposition of o.55 moles of ammonium nitrate useing the equation: NH4NO3 (s)--> N2O (g) + 2H2O (g)
*April 14, 2011*

**chemistry**

How many moles of carbon monoxide are needed to react completely with 1.75 moles of iron oxide? based on this equation: Fe2O3(s)+3CO(g)--->2Fe(s)+3CO2(g)
*April 11, 2011*

**chem**

1,3,5 will do it
*April 9, 2011*

**Statistics**

10.14
*April 7, 2011*

**Maths**

The product of two positive consecutive odd numbers is 255. What are the numbers? Please write this problem in quadratic equation form please
*April 5, 2011*

**chemistry**

A gas mixture contains oxygen and argon at partial pressures of 0.60 atm and 425 mmhg. If nitrogen gas added to the sample increases the total pressure to 1250 torr, what is the partial pressure in torr?
*April 3, 2011*

**chemistry**

HOW MANY LITERS OF H2 must react to produce 75.0g of PH3
*April 3, 2011*

**Stats**

With technology, is it necessary to use one sample z test for large sample instead of binomial testing?
*March 31, 2011*

**chemistry**

according to this law ,as magnitude of chrages increases,what happens to the strength of attraction?
*March 24, 2011*

**Chemistry**

What makes Permanganate such a good oxidizing agent?
*March 23, 2011*

**Material Science**

1).Does more grain boundaries result in a higher ultimate tensile strength? 2).Does an increase in stiffness of a material result in a higher modulus?
*March 22, 2011*

**Science**

If you were to move the load by applying force from the top, what kind of machine might be the most appropriate to lift the load 5 cm?
*March 21, 2011*

**alg I**

Yellow, green, and red chips are placed in a bag. The odds against pulling a green chip are 2/5. What is the probability of pulling a green chip?
*March 20, 2011*

**Physics**

Two sounds have measured intensities of I1 = 100 W/m2 and I2 = 300 W/m2. By how many decibels is the level of sound 1 lower than that of sound 2?
*March 19, 2011*

**alegebra**

a 210 ft. long rope is cut into 3 pieces. the first piece of rope is 3 times as long as the second rope. the 3rd piece of rope is 2 times as long as the second piece of rope. What is the lenght of the longest piece of rope?
*March 18, 2011*

**geometry**

The diagnol of a rectangle is 20 inches. The width is 4 inches shorter than its length.
*March 15, 2011*

**Microeconomic**

my answer would be A
*March 11, 2011*

**Microeconomic**

If your marginal utility from your last session with your personal trainer is equal to the price she charged you, then: Thank you-Jane
*March 11, 2011*

**maths**

Facrt
*March 8, 2011*