Wednesday
May 4, 2016

# Posts by krissy

Total # Posts: 83

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

nutrition
The correct answer is (a)The total grams of fat in the American diet has stayed relatively constant over the past 40 years.
July 19, 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

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

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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