Saturday

August 1, 2015

August 1, 2015

Total # Posts: 1,465

**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*

**maths**

Need help to know what to do: solve the equation 9/(x=7)=4/(x-3) My book tells me to cross multiply, then move all the terms in x and the terms without x on separate sides of the equation. then divide by the coefficient of x. How do i do this? I don't understnd it what ...
*March 8, 2011*

**geometry**

Julian is interested in building a new house. Three architects have given him plans. The first plan is for a house that will be 2,250 square feet. The total cost of the house will be $281,250. The second plan is for a house that will be 2,400 square feet. The total cost of the...
*March 7, 2011*

**chemistry**

Determine how many milliliters of 0.102M NaOH solution is needed to neutralize 35.0mL of 0.125M H2 SO4 solution.
*March 1, 2011*

**science**

what is the human life cycle
*March 1, 2011*

**physics**

Calculate the gravitational force between the Sun and Neptune. The mass of the Sun is 1.99×1030 kg. The mass of Neptune is 1020×1023 kg. The distance between them is 450×1010 m.
*February 26, 2011*

**physics**

I am confused because the answer should be in mi/s.
*February 26, 2011*

**Physics**

A rod with cross-sectional area A and length L is made from a material with a Young's modulus of Y. This rod could be considered an extremely stiff spring with some spring constant k. Find an expression for k in terms of the other quantities.
*February 25, 2011*

**Ethics**

thanks
*February 22, 2011*

**Ethics**

What moral is the fondness of war related to? I'm trying to sum it up in a concise phrase or word but I can't think of the right one. Ambitiousness? Belligerent? Thanks
*February 22, 2011*

**precalculus**

oops! i mean HYPERBOLA FORM
*February 21, 2011*

**precalculus**

Hi does anyone know how to solve this equation into parabola form? thanks x^2 + 2xy +3y^2 = 9
*February 21, 2011*

**math**

He had a lot on his mind
*February 17, 2011*

**math**

how tow write two word phrases for t/30
*February 16, 2011*

**Chemistry**

Thank you, I estimated the surface tension to be around 72.4 dynes/cm.
*February 15, 2011*

**Chemistry**

What is the surface tension of water at 23 degrees Celsius?
*February 15, 2011*

**Chemistry**

How much of a 500 ml bottle of 1.00 molar KCI solution should be diluted with deionized water to give 200.0 ml of a 0.100 molar solution
*February 14, 2011*

**child development**

b
*February 14, 2011*

**world history**

a b a b c d a c d d c a a b c b b c a c
*February 14, 2011*

**Geometry**

Thank you!
*February 4, 2011*

**Geometry**

If U is between T and B, find the value of x and the measure of TU. TU=4x-1, UB=2x-1, TB=5x Please help!
*February 4, 2011*

**social studies**

Where was indiana's first battle in the civil war
*February 3, 2011*

**Physics**

Does anyone know how to find the electric force of two objects if I have the distance and mass of the one of the objects? Thanks.
*February 3, 2011*

**Chemistry--Quick Question**

Sorry correction! I forgot to include one word I meant scientific knowledge The first step in acquiring scientific knowledge is often the observation or measurement of some aspect of nature. a. True b. False
*February 2, 2011*

**Chemistry--Quick Question**

The first step in acquiring knowledge is often the observation or measurement of some aspect of nature. a. True b. False
*February 2, 2011*

**algebra**

6n+8=50 answer using the balancing method
*January 30, 2011*

**Math**

This questions is like a word problem for a triangle. Draw point A and head 2 unit down draw point B there, then draw a point 3 units to the right. draw point C there it should be a right triangle with C-A as the hypotenuse. So distance C-A equals the square root of 2^2 + 3^2 ...
*January 25, 2011*

**math**

hi does anyone know what (h+t)^6 is? Thanks
*January 25, 2011*

**math**

hi does anyone know what (h+t)^6 is? Thanks
*January 25, 2011*

**statistics**

The size of a car \\\\\9small,med, and lar) are measured on a)ratio b) interval c) ordinal D nominal scale. Why
*January 20, 2011*

**12 th English**

I need to write a Parody on TV media analysis. Where do I begin?
*January 19, 2011*

**Chemistry--Quick Question**

I have the same question for class! correct answers are a,c,d?
*January 18, 2011*

**chemistry**

If 8.00 kJ of heat are added to 200. g of water at 20.0 C, what is the final temperature of the water?
*January 17, 2011*

**Math**

If a right triangle has legs of 9in. and 12in. What is the length of the hypotenuse?
*January 12, 2011*

**calculus ap**

If g is a differentiable function such that g(x) is less than 0 for all real numbers x and if f'(x)=(x2-4)g(x), which of the following is true?
*January 2, 2011*

**math **

what is 7-2i in trig form? and if u=3j and v=7i+j what is the dot product of u times v dont get this one because there are no i terms for u thanks
*December 30, 2010*

**world history**

what three types of land are best suited for agriculture
*December 19, 2010*

**algebra**

the length of the top of a table is 6 m greater than the width. the area is 91m^2. Find the dimensions of the table.
*December 19, 2010*

**physics**

Two boxes are seen to accelerate at the same rate when a force F is applied to the first and 5 F is applied the second. What is the mass ratio of the first box to the second?
*December 15, 2010*

**physics**

A 1.5 kg otter starts from rest at the top of a muddy incline 87.1 cm long and slides down to the bottom in 0.60 s. What net external force acts on the otter along the incline?
*December 15, 2010*

**Physics**

An airplane of mass 1.3 104 kg is moving at 64 m/s. The pilot then revs up the engine so that the forward thrust by the air around the propeller becomes 7.2 104 N. If the force exerted by air resistance on the body of the airplane has a magnitude of 4.0 104 N, find the speed ...
*December 13, 2010*

**fin**

3. Suppose an individual's MRS (of steak for beer) is 2s/b and this person is currently consuming equal amounts of steak and beer. Suppose also that the price of a steak is $1 and a beer is $4. Then what should the individual do in order to increase utility? Explain in 3-5...
*December 10, 2010*

**fin**

4. If an individual's utility function for coffee (x) and cream (y) is given by U(x, y) = min (x, 5y), write the demand function for coffee .
*December 10, 2010*

**macroeconomic theory**

7. Assume x and y are the only two goods a person consumes. If after a rise in pX the quantity demanded of y increases. Evaluate the following as true or false and explain. Support your explanation with a graph. The income effect dominates the substitution effect for good y...
*December 10, 2010*

**macroeconomic theory**

4. If an individual's utility function for coffee (x) and cream (y) is given by U(x, y) = min (x, 5y), write the demand function for coffee .
*December 10, 2010*

**math**

sin^-1 (12/7 sin42\[Degree]) b = sin -1 (12/7 sin 42 degrees) How do I do this?
*December 8, 2010*

**Trig**

How do I do this? I punch the numbers into my calculator, and they don't work. B=sin^-1 (12/7 sin42\[Degree])
*December 8, 2010*

**MATH**

solve (x-3)(x+3)<0. xsquared-3x+3x-9 x squared=9 x=3
*December 8, 2010*

**algebra**

1/2x
*December 8, 2010*

**pre-algebra**

3x + 2x=5-6+6 5x=5 x=1
*December 8, 2010*

**Math**

a. 10% out of 100% failed A or 10/100 3% of 100% failed A & B or 3/100 3% that failed A(10%) also failed B or 3/10 b. 12% out of 100% failed B 3% out of 100% failed A & B or 3/12 c. failed A - 10% failed B - 12% sub total 22%(-3% counted double-failed both) = 19% total d. 100...
*December 8, 2010*