Wednesday

November 25, 2015
Total # Posts: 82

**physics**

The heating element of a water heater in an apartment building has a maximum power output of 29 kW. Four residents of the building take showers at the same time, and each receives heated water at a volume flow rate of 12x10-5 m3/s. If the water going into the heater has a ...
*November 17, 2015*

**physics**

A commonly used method of fastening one part to another part is called "shrink fitting." A steel rod has a diameter of 2.0046 cm, and a flat plate contains a hole whose diameter is 2.0000 cm. The rod is cooled so that it just fits into the hole. When the rod warms up...
*November 17, 2015*

**physics**

A bicyclist accelerates –0.87 m/s2 during a 3.8 s interval. What is the change in the velocity of the bicyclist and bicycle?
*October 1, 2014*

**general physics**

what are the differences between polygon and parallelogram method?
*June 20, 2014*

**maths**

2x+y=7 x(2)-xy=6 pl plz help me someone
*April 12, 2014*

**maths**

Small pizza Diameter = 15 cm Medium pizza Diameter = 30 cm I$ a medium pizza twice as large as a small pizza? Use calculations to support your answer. A medium plz can someone help me
*February 25, 2014*

**maths**

help plz dnt understand this
*February 11, 2014*

**maths**

sketch the graph of each line y= -7x+3 and there is a graph drawn with y axis range from -6:6 x axis range frm -6:6
*February 11, 2014*

**maths**

help plz solve for x ;2x+9/5
*January 26, 2014*

**maths**

given tht g(x)=2x+1/5 and f(x)=x+4 write an expression for gf(x) write an expression for me plz
*January 26, 2014*

**maths**

WHAT IS THE VALUE OF THE 2 IN THE NUMBER 48.621? I SAY 2/10 IS THAT CORRECT
*January 23, 2014*

**maths**

WHAT IS THE VALUE OF THE 2 IN THE NUMBER 48.621? I SAY 2/10 IS THAT CORRECT
*January 23, 2014*

**maths**

its 4 AND 3/8 IT A WHOLE AND FRACTION 4 IS THE WHOLE#
*January 23, 2014*

**maths**

express 4_3_ as a decimal to 3 sig fig plz 4
*January 23, 2014*

**maths**

thnks this was what i did put was sure if i was corect
*January 23, 2014*

**maths**

john,peter and mary shared a sum of money in ratio 2:4:9.john and peter together received $360.how much money was shared?plz to show working
*January 23, 2014*

**maths**

oohh ok thnk u i got it now thnks much
*January 23, 2014*

**maths**

why multiply by 10000
*January 23, 2014*

**maths**

plz can someone show me how to work out this #exact value of 6/(0.0003)is
*January 23, 2014*

**maths**

ok thnk u
*January 20, 2014*

**maths**

the book i have give the answer as (a)4:1 (b)1:4
*January 20, 2014*

**maths**

i spend $4.80 on groceries and $1.20 on vegetables.what is the ratio of cost of (A)groceries to veg (B)veg to groceries
*January 20, 2014*

**maths**

100 cents = $1 6*100 that how u get it jus want to understand clearly thnk u again
*January 17, 2014*

**maths**

thank u how do u get the 600
*January 17, 2014*

**College Algebra--Still Confused **

I have a few problems I need help with and also do have multiple choice. If I can have an explanation of how to get the answer that would be great. 1. Use the discriminant to determine whether the given equation has two irrational roots, two rational roots, one repeated root, ...
*February 5, 2013*

**College Algebra **

The expression x^2-7 is not factorable using integer values. But the expression can be written in the form X^2-(Square root7)^2 enabling us to factor it as a “binomial” and its conjugate: (x+square root 7)(x-square root 7) Use this idea to factor the following ...
*January 21, 2013*

**College Algebra**

Thank you so much that does make scense. I just posted one more kinda like it if you dont mind explaining?
*January 21, 2013*

**College Algebra**

I'm wondering how to answer this. The conjugate of 2-Square root 3 is?
*January 21, 2013*

**College Algebra **

I need some help with a handful of questions. I need to see the steps on how to get to the final answers. I would also appreciate if you can explain how you got to those steps. Rationalize each expression by building perfect nth root factors for each denominator. Assume all ...
*January 21, 2013*

**College Algebra help please**

I need some help with a handful of questions. I need to see the steps on how to get to the final answers. I would also appreciate if you can explain how you got to those steps. Rationalize each expression by building perfect nth root factors for each denominator. Assume all ...
*January 20, 2013*

**College Algebra**

I need some help with a handful of questions. I need to see the steps on how to get to the final answers. I would also appreciate if you can explain how you got to those steps. Rationalize each expression by building perfect nth root factors for each denominator. Assume all ...
*January 19, 2013*

**Algebra**

Thanks Steve! You've been a great help through this
*January 16, 2013*

**Algebra**

1. Create the indicated algebraic expression. Use descriptive variables. The length of a rectangular lawn is 6 ft more than three times the width of the lawn. Express the length of the lawn in terms of the width. A. 3+w+6 B. 3(w+6) C. 6w+3 D. 3w+6 For 1 I thought it was B? 2. ...
*January 16, 2013*

**College Algebra **

I posed these one's before but added parenthesis which I think made it confusing as the actually questions do not have them. So, I'm reposting them without to see if it makes sense. If not I understand. 1. Compute as indicated. Write your answer in lowest terms. a+3/a^...
*January 16, 2013*

**College Algebra **

Last one for today! Again would appreciate a breakdown on how to get to a resolution. It is multiple choice. 1. Simplify the expression using the quotient to a power property. (3y^6/z^7)^3 a. 27y^9/z^7 b. 3y^9/z^10 c. 27y^18/z^7 d. 27y^18/z^21 2. Use a descriptive variable and...
*January 15, 2013*

**College Algebra **

I have a few more questions that I'm not understanding. Its multiple choice however I would appreciate a breakdown on how to solve. 4.Simplify the compound rational expression. Use either method. 1+(5/y-10)/y+(25/y-10) a. 1/y-5 b. 1/y+5 c. 6/y+25 d. 1/y+1/5 5.Simplify the ...
*January 15, 2013*

**College Algebra **

I have a few more questions that I'm not understanding. Its multiple choice however I would appreciate a breakdown on how to solve. 1.Evaluate without a calculator, using the order of operations. -2^2+20-|8-20|-squareroot of 64 a. -36 b. 4 c. 28 d. -4 2.Simplify the ...
*January 15, 2013*

**Chemistry**

Why is the DNA information coded in "threes"?
*December 19, 2012*

**Chemistry**

What are chiral carbons and why do they lead to isomers?
*December 19, 2012*

**Chemistry **

I need help naming these compounds. I CL H H | | | | CH3-CH-CH-C=C-CH3 F CH3 O | | || CH3-CH-CH-CH2-CH-C-OH | CH2-CH3 CH3-CH2-CH2 | CH3-CH2-C-C-CH-CH3 | || | Br O CH3
*December 18, 2012*

**statistics**

sample size needed with a mean of 100,standard deviation of 20 for the the population of normal adults an iq range to fall between 2 iq points with 95% confidence interval
*December 1, 2012*

**Chemistry**

The following three step mechanism has been proposed for the oxidation of iodide ion by peroxide: H2o2 + I^- ----> HOI + OH^- Slow OH^- + H^+ ----> H2O Fast HOI + H^+ + I^+ ---> I2 + H2O Fast A. What is the overall reaction described by this mechanism? B. What is the ...
*November 20, 2012*

**Chemistry **

Your Open Question Show me another » Chemistry help needed... Confused? The following reaction is first order and the rate constant is 2.35 x 10^-4 s^-1 at 20 degress C. 2 N2O5 -----> 2 N2O4 + O2 A.) What is the rate of reaction if the [N2O5]=.25 M? B. What would the...
*November 20, 2012*

**Physics (Science)**

Hi, For my physics class, we have to design our own experiments to calculate the amount of power exerted for each situation. However, I'm really unsure of how to go about finding the power for the situations. The first situation is doing a push-up, and the second is ...
*October 25, 2012*

**Algebra**

Z-12 / 3=4
*July 31, 2012*

**math**

WRITE THE NUMBER 99 AS A PRODUCT OF PRIME FACTORS
*February 4, 2012*

**calculus**

3 ft/sec
*December 11, 2010*

**physics**

if four of length on a real home is represented by one inch on a scale model of the home, what legth on the scale model would represent one foot on the real home?
*September 26, 2010*

**algerbra**

my mom and I can not figure this one out please help!!!! -(a-3b+27) I need to simplify.. Mom states it will be -a+3b-27 I don't think you can do this Why would you just change the signs...
*September 7, 2010*

**economics**

I need to review a n example of an essay on a 700-1,050 word essay on one good that you have had experience purchasing and the good I chose is online college explaining factors that could cause possible chandes in supply and demand. Determine at least 2 substitutes there may ...
*August 14, 2010*

**science**

Which pairs of substances will form a buffer when mixed in equal concentrations?
*March 28, 2010*

**Chemistry**

I was given a question on an assignment and I can't figure it out. The question is A student collects 90ml of oxygen gas over water at 25c and a total pressure of 99.3kPa from the decomposition of KClO3. 2KClO3(s)-> 2KCl(s)+ 3O2 a) How many mols of O2 were collected? b)...
*March 6, 2010*

**Physics**

Find the net force on a,b and c. Given ma=363kg mb=517kg and mc=154kg. a<--0.5m-->b<--0.25-->c This was a question given to our class by our physics teacher ... he did not show us how to do it. So any help/steps involved to solve this problem would be much ...
*February 21, 2010*

**10th grade chemistry**

in terms of chemical bonding why ammonia has a much lower melting point than water
*February 15, 2010*

**chemistry **

Thank you so with those corrections my new calculations would be .0090*100.05 = .90045g Hopefully this time it is right. Obviously I am not chemisrty gifted.
*January 29, 2010*

**chemistry **

please check if I did this right ... calculate the mass of white solid CaCO3 that forms when 98ml of a 0.1M Ca(NO3)2 solution is mixed with 54 ml of a 2.5M Na2CO3 solution. Ca(NO3)2 + 2NaCO3 -> Ca(CO3)2 + 2NaNO3 .098*0.1 =.0090 .054*2.5 =.135 limiting reactant is Ca(NO3)2 ....
*January 29, 2010*

**chemistry**

lol to be honest I have no idea why it is the limiting reactant. Thank you so much for posting it helped a great deal when compared to the previous one.
*January 29, 2010*

**chemistry**

mix 120ml of 0.320M silver nitrate with 40ml of 0.320M potasium chromate. What mass of silver chromate is produced? this is what i have so far 2AgNO3 + K2CrO4 --> Ag2CrO4 + 2KNO3 molar mass of 2agno3 = 277.81 molar mass of k2cro4 = 194.2 molar mass of ag2cro4 = 331.8 ...
*January 29, 2010*

**Chemistry**

Thank you so much, now I understand ... I think :)
*January 29, 2010*

**Chemistry**

this is what I came up with 2AgNO3+k2CrO4--->Ag2CrO4+2KNO3 molar mass of 2agno3 = 277.18 molar mass of k2cro4 = 194.2 molar mass of ag2cro4 = 331.08 194.2*277.18/120ml=500ml limiting reactant k2cro4 194.2g*331.08g/500=128.60 128.60*331.08/1000=42.6 is this anywhere near right?
*January 29, 2010*

**Chemistry**

mix 120ml of 0.320M silver nitrate with 40ml of 0.320M potasium chromate. What mass of silver chromate is produced? I am stuck please help
*January 29, 2010*

**chemistry**

I have 3 questions I need help with 1. mix 120ml of 0.320M silver nitrate with 40ml of 0.320M potasium chromate. What mass of silver chromate is produced? 2. Calculate the mass of white solid CaCO3 that forms when 98ml of a 0.1M Ca(NO3)2 solution is mixed with 54ml of a 2.5M ...
*January 27, 2010*

**Earth Science**

On the surface of the earth, it is approximately 6,200 miles from the equator to the north or south pole. How many miles is it between 2 parallels 1 degree apart?
*October 18, 2009*

**math**

for the #1 how do u got -3 4/5 if u check good u got -3/5
*June 30, 2009*

**microbiology**

disadvantages of using a levy-hausser chamber.
*February 24, 2009*

**chem**

quantitative determination of acetylsalicylic acid in aspirin tablets by back titration 1)why do we use a more dilute NaOH solution for the standardization of NaOH? 2)what is the rationale behind the dilution and aliquoting of the aspirin sample? 3)what are the principles ...
*January 20, 2009*

**math**

(logx)(x+2)=2
*December 7, 2008*

**math**

log x (x+2)=2
*December 7, 2008*

**poems**

Can you name any poets?
*April 6, 2008*

**Hey guys i just need your opinion**

someone answer this question.. please... because I dont know any poems well any good ones anyways
*April 6, 2008*

**Hey guys i just need your opinion**

What is your favorite poem? Name the poet and title of poem... thank you =oD
*April 6, 2008*

**English**

wow! when i read the first few sentences i was amazed!
*April 6, 2008*

**economics**

Each week, Bill, Mary and Jane select the quantity of two goods, x1 and x2, that they will consume in order to maximize their respective utilities. They each spent their entire weekly income on these two goods. Suppose you are given the following information about the choices ...
*February 24, 2008*

**spanish**

hey i'm having a bit of trouble with spanish. Any help with differentiation the two would be great. hace + period of time + que + present tense AND hacía + period of time + que + imperfect tense. I have my spanish book with me, and it tells me the difference but I ...
*December 15, 2007*

**Algebra**

Name the line which have the following characteristics: 1) Passes through (2,3) & (0,-9) 2) Perpendiculat to the line 4x-2x=7 and through (1,-3) 3) Perpendicular to the segments with endpoints (2,1) & (-4,-1) and through the midpoint of the segment. If possible show some quick...
*December 2, 2007*

**Geometry**

1) Draw a valid conclusion if possible: Parallel lines do not intersect If lines do not intersect, then they have no points in common. **can this logical argument be identified by name? If yes, name it. 2)Draw a conclusion given AB bisects segment XT at point W 3)(just show ...
*October 7, 2007*

**algebra**

3x-5(3x-7)=2(x+9)+45 3x-15x+30 = 2x + 18 + 45 (distribute) -12x + 30 = 2x + 63 (combine like terms) ------------------ 30 = 14x + 63 (further combine like terms--additive property) -33=14x (move 63 to other side [giving you -33] *simplify* x= -2.35 (simplify, divide 14 into -...
*October 7, 2007*

**algebra**

woops looks like my math was wrong-- mm you're answer is correct. Nice job at showing you're work!
*October 7, 2007*

**Art Ideas?**

I am suppose to do a carboard-cut out sculpture, as a piece to decide whether I go on a art conference or not. The theme is "reaching higher" I have thought of start hanging down...and a large filstrip with hand reaching higher and higher...eventually one would grab ...
*December 11, 2006*

**SCIENCE**

What is the difference between (aq) and (l) ...what do they mean. I know Aq is a aueous solution while (l) is a liguid with only one element...but what is the difference between them? thanks duplicate post.
*December 11, 2006*

**math**

how many square inches are in a square foot A square foot has 12 inches on each side. To find the number of square inches, multiply 12 x 12. You can also go to www.google.com and type in 1 square foot to square inches and press enter.
*September 26, 2006*

**Chemistry, PPPLLEASE Help!**

Hello, I'm confused on what these problems are telling me. Is questions a) and b) the same? I don't know, please help me I don't know what to do... The inteconversion of DHAP and G3P is a part of both the glycotic pathway and the Calvin cycle for phoyosynthetic ...
*September 25, 2006*

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