Saturday
December 10, 2016

# Posts by t

Total # Posts: 402

science
magnetite will attract this
November 1, 2010

The first bullet has 2.4 Joules of energy, and the second has 9.6 Joules of energy. The equation is 1/2*m*v^2: You forgot that the mass is given in grams instead of kilograms, so you need to convert to kg (grams/1000, so .003 kg). You also didn't square the velocities. The...
October 31, 2010

Chemisty
A 5M solution is diluted 1/10 and again 1/5. What is the concentration of each dilution?
October 31, 2010

PreCalc
what is the cot of theta if the cos of theta = 4/9 and theta lies in quadrant IV
October 18, 2010

chemistry
The beaker with with 300ml of water contains more heat.
October 17, 2010

calc
Average daily temp,y, is y=45-23cos(2pi(x-32)/365), where x is time in days, x=1, corresponds to Jan 1 and y is temp in degrees F. Determine the period of the function. Determine critical numbers, over one period. Determine relative extrema, what does relative extrema represents
October 16, 2010

Math
Depreciation of an office machine. Data regarding the value of a particular color copier is represented in the following graph. At what rate is the value changing?
September 29, 2010

chemistry
I don't know
September 3, 2010

college
The value of a mint state 63 uncalculated 1950 Jefferson nickel minted at Denver is 8/7 the value of a 1945 nickel in similar condition minted at Philadelphia. Together the total value of the two coins is 15.00 what is the value of each coin?
August 29, 2010

Math (Very Easy Math)
Simplified-down to lowest terms;cannot be reduced any more. I hope this helped,this is my own definition.
July 24, 2010

CHEMISTRY (WEBWORK)
^^ that's right. i just got it.
July 19, 2010

Physics
While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?
July 8, 2010

Algebra
Amy paid \$67.15 for a pair of running shoes during a 15% off sale. What was the regular price?
June 10, 2010

Find the perimeter or given triangle. KLM if JHG~KLM, KM=6, HJ=3, JG= 4, and GH=6. The biggest triangle is FHL. KLM is part of right corner of the big triangle and JHG is the left corner of the big triangle.
June 7, 2010

math
Math:How could the following information be represented as a ration? Of fifty people interview, none had ever eaten sushi. is it 50:0
June 1, 2010

geometry
a rectangle field is 130 m by 420 m. a rectangle barn 19 m is built in the field. how area is left ove?
May 28, 2010

human services
What are some health hazards employees may encounter in human services?
May 26, 2010

chem-redox
write down Oxidation equation, Reduction equation and Overall equation theres 3 equations *H2O2 + H2SO4 + KMnO4 *H2O2 + KMnO4 *and *Ethanol + H2O2 + K2Cr2O7
May 16, 2010

Algebra 2 with trigonometry
2sin2xcos2x cos^4x-sin^4x (sinx+cosx)^2-sin2x 2sinxcos^3x+2sin^3xcosx
May 6, 2010

Algebra 2 with trigonometry
2sin2xcos2x cos^4x-sin^4x (sinx+cosx)^2-sin2x 2sinxcos^3x+2sin^3xcosx
May 6, 2010

Algebra 2 with trigonometry
A baseball diamond is a square 90 feet on a side. The pitcher's mound is 60.5 feet from home. How far does the pitcher have to run to cover first? (we are using the LAW OF SINES AND COSINES)
May 6, 2010

chemisty
how many grams of precipitate are produced when 0.300 M K2CrO4(aq) (50.0mL) are added to excess BaCl2(aq)?
May 4, 2010

science
CO2 binds with water to make carbonic acid (H2CO3)
April 28, 2010

critical thinking
Premise- Since most all disease can be effectively prevented by a healthy lifestyle. Conclusion-Animal activist sometimes contend that medical research is unneccessary. Is this a valid/sound argument or is this an ivalid/unsound argument?
April 21, 2010

chem - pressure
i did p1/t1 =p2/t2 converted celsius to kelvin i get 935.5 mmHg for a then 333.2 for b i don't get c
March 31, 2010

chem - pressure
A closed vessel with volume of 226.9mL initially contained air at 680.8mmHg at 16.5 degrees celcius. A sample of an organic liquid of mass 0.113g was injected into the flask which was then warmed to 124.9 degrees celcus causing all the organic liquid to vaporise. The final ...
March 31, 2010

chemistry
A closed vessel with volume of 226.9mL initially contained air at 680.8mmHg at 16.5 degrees celcius. A sample of an organic liquid of mass 0.113g was injected into the flask which was then warmed to 124.9 degrees celcus causing all the organic liquid to vaporise. The final ...
March 31, 2010

chemistry
the answer in the book was 4.3 grams but if you do that you get 169.8731/0.988 which is 171.94 g i don't get it
March 25, 2010

chemistry
it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?
March 25, 2010

chemistry
it is desired to prepare 250.0mL of a standard solution having a concentration of 0.1000M AgNo3. How many grams of a sample of AgNO3 of 98.8% purity are required for this purpose?
March 25, 2010

MANAGEMENT ACCOUNTING
The representation for fixed cost per unit of activity is:
March 24, 2010

marketing-
Factors Alex should consider include external influences (i.e., culture, subculture, demographics, social status, reference groups, family, and marketing influences) and internal influences (i.e., perception, learning, memory, motives, personality, emotions, and attitudes). ...
March 15, 2010

Chemistry
The pressure inside a hydrogen-filled container was 2.10 at 21 . What would the pressure be if the container was heated to 96?
February 2, 2010

calculus
Let F(s)=5s2+1s+4. Find a value of d greater than 0 such that the average rate of change of F(s)from 0 to d equals the instantaneous rate of change of F(s)at s=1.
February 1, 2010

chemistry
Okay, I guess I should rephrase my question. I know how to go from moles to grams. My REAL question is the dilution part. When I do M1V1 = M2V2, I do (0.562 M)(0.001 L) = (x)(0.05 L), but that doesn't seem right, because the answer is 0.01124 mol and when I convert that to...
January 31, 2010

chemistry
Mass of Aspirin tablet: 0.357 g 10 mL of 1 M NaOH was added to the aspirin tablet in a 125 mL Erlenmeyer flask and heated to a boil. The solution was transferred to a 100 mL volumetric flask and the flask was filled to the mark with DI water. 1 mL of the solution was pipetted ...
January 31, 2010

math
never mind got it... Thanks
January 28, 2010

math
what are the subsets of S?
January 28, 2010

math
WHAT IS A 100-GON
January 23, 2010

Physics
So, V^2=g*L V=sqrt 9.8 * 2.17
January 11, 2010

AP Physics B (Heat Engines)
Do not multiply the percentages you calculated by .65, because you already multiplied it to get 17% and 14.6% :)
December 16, 2009

math
A pair of dice are rolled and the sum on their upturned faces is recorded. What is the probability that the sum showing is 8, given that one die is showing a 5?
December 16, 2009

algebra
y-9>-16 the solutions is y> i don't get this?
November 1, 2009

Chemistry
What volume of 0.178 solution is necessary to completely react with 92.3 of 0.106?
October 8, 2009

3rd gr social studie
He know how to do the work it just when the teacher is explaning the lesson is the problem.
September 29, 2009

my need help with 3rd grde social studies
September 29, 2009

Algebra 1
y=-2x + 4
September 24, 2009

Economics
The statement, “A manager should never hire another worker if the new person causes diminishing returns.” is false. A manger should hire what is needed as long as the point of negative marginal product is not reached. Going beyond the point of diminishing returns is...
July 6, 2009

statistics
The sum of the residuals is __________. Is it 0?
July 2, 2009

AP Chemistry
I need help with figuring out an appropriate way to do this sort of lab: how to determine an unknown compound. With this one however, the teacher just gave us a white powdered compound - and asks us to figure out how to identify it using ANY lab procedures. He gave hints that ...
May 18, 2009

data management (gr.12)
2^n-1=2^4-1=15 2 is always the base (you either pick it or you don't) and 4 because there are 4 options and subtract one because you exclude the empty or null set.
February 23, 2009

Stats
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the mean crash damages the same for...
August 4, 2008

ART
HENRY MOORE
July 16, 2008

statistics
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated. Five test vehicles of each type were crashed, with the results shown below. Research question: Are the mean crash damages the same for...
June 19, 2008

Chemistry
hi i was just wondering what the solution would be to: AgNO3 + Na2S2O3 + sunlight (light enegy) ?
May 27, 2008

science
how much water is there in a can of coke
May 26, 2008

science
are the ingrdients in coke soluble or unsoluble
May 26, 2008

science
why does warm coke go flat
May 26, 2008

science
why do bubbles form in coke when poured into glass
May 26, 2008

science
when a coke can is frozen it explodes, why
May 26, 2008

science
why do coke cans get moisture on the outside when they are taken out of the fridge
May 26, 2008

math
a plane with an airspeed of 192mi/h is headed on a bearing of 121 degrees. a north wind is blowing (from north to south) at 15.9 mi/h . find the ground speed and the actual bearing of plane.
May 24, 2008

MATH
a traingle has an area 48 square cm and its shorter sides have lengths 9cm and 12cm. find the lagest angle of the traingle.
May 24, 2008

MATH
The Captain of a freighter 8km fromthe nearer of two unloading docks on the shore finds that the angle between the lines of sight to the docks is 35 degrees. if the docks are 10km apart, how far is the tanker from the farther dock? The Captain of a freighter 8km fromthe nearer...
May 24, 2008

MATH
Two Planes leave an airport at the same time, one flying 300km/h and the other at 420km/h The angle between their flight paths is 75 degrees after three hours, how fart apart are they? answer: so it would be c^2=a^2+b^2-2ab cos C 900^2+1260^2-2(900)(1260)(cos75) c^2=33542.9 c=...
May 24, 2008

excel 2007
I need an excel formula that averages students test scores, dropping the lowest score if all 5 tests are taken
April 1, 2008

excel 2007
I have to average students test scores but if they have taken all five tests, I need to drop the lowest score before averaging
April 1, 2008

chemistry
Opps. That must have been a mistake made by the teacher when typing because I just looked back at an extra i had of the worksheet and it is printed exactly as i typed it. no worries. i did my best.
March 2, 2008

chemistry
I have more more problem i need some help figuring out. I really do not know how to even approach this problem; there is so much information. - A newspaper article about the danger of global warming from the accumulation of greenhouse gases such as carbon dioxide states that &...
March 2, 2008

Chemistry
i figured out my question, haha. will post if i need more help. thanks again! this website is amazing!
March 2, 2008

Chemistry
youre right. we were taught to use dimenstional analysis as opposed to a formula. i'm a bit confused at this point now. 3a. convert mols (CN)2 to mols CF4. I'm not sure how to set it up. Do i put the mols of (CN)2 I found (which is 2.67 by my caluculations) over 2CF4? ...
March 2, 2008

Chemistry
When you say in step 2a to convert you mols by using grams/molar mass, you do mean to just put 80/the molar mass of (CN)2 correct? because i have been taught to do it differently.
March 2, 2008

Chemistry
THANKS SO MUCH. i actually typed number two exactly as written. maybe that's why it is so confusing to me too - it really does not contain all the infomation needed, at least i do not think it does.
March 2, 2008

Chemistry
I have a few questions, if anyone can help me at all it would be amazing. i need this done by TOMORROW (03/03/2008) 1. Cyanogen has been observed in the atmopshere of Titan, Saturn's largest Moon, and in the gases of the interstellular nebulas. On Earth, it is used as a ...
March 2, 2008

Chem
I have a few questions, if anyone can help me at all it would be amazing. i need this done by TOMORROW (03/03/2008) 1. Cyanogen has been observed in the atmopshere of Titan, Saturn's largest Moon, and in the gases of the interstellular nebulas. On Earth, it is used as a ...
March 2, 2008

algebra or math
Explain in words how to write an equation that is part one: parallel and then also part two: perpendicular to the equation y=2/3x-4 passing through the point (-2,-5). Write your answer in standard form.
February 6, 2008

math
try this (89+76+65+x)/4 ≥ 70
December 13, 2007

math
.25x=60 solve for x. (your number)
December 13, 2007

Chemistry
duh, that makes sense. Thanks
December 13, 2007

Chemistry
What volume of O2 is required to react with excess CS2 to produce 4.0L of CO2 Assume all gases at STP. Not sure what I am doing wrong, but the answer I am getting is not one of the answers. 4L/X mole=22.4 L/1 mole ===>.1786 mols Balanced equation: O2 + CS2 --> CO2 + S2 ....
December 13, 2007

science
can anybody give me an explanation of the kinetic theory. My science is due on friday 16th november. please help!
November 11, 2007

science
cam anybody give me an explanation of the kinetic theory. My science is due on friday 16th november. please help!
November 11, 2007

chem
how would you make a 4% percent paraformaldehyde solution? Work: starting from 20% (diluted with PBS) V1C1=V2C2 (100)(20)=(x)(4) x=500 so add 496 ml of PBS (accounting for 4% paraformaldehyde) or would you add 500ml of PBS Thank you
September 17, 2007

Algebra
8(a-b)2+14(a-b)-15 Is 8(a-b)2 supposed to mean 8(a-b)^2? If so, what you have written can be factored into [2(a-b)+ 5][4(a-b)-3] = (2a -2b +5)(4a -4b -3)
August 15, 2007

Human Resources Management
Recommending to a company's board of directors that affirmative action policies be implemented.? Include points supporting the recommendation and clearly address points that may be used agaisnt this recomendation. How affirmative action policy will relate to compliance ...
August 9, 2007

Human Resource Management
how to address the board of directors that affirmative action should be implemented Tell the board that it's the law that affirmative action must be addressed. Do your research to cite the specifics.
August 9, 2007

Algebra
Adult tickets for a play cost \$9 and child tickets cost \$8. If there were 23 people at a performance and the theater collected \$193 from ticket sales, how many children attended the play? A = number of adults C = number of children Set up two equations. A + C = 23 9A + 8C = ...
July 29, 2007

Financial Management
What are reasonable cost of capitol for evaluating average risks projects, high risks projects, and low risk projects? cost of capital= real cost of money + expected return + probability of failure where probability of failure is the risk, expressed as a probability that the ...
July 17, 2007

Financial Management
What does calculating the weighed average cost of capitol tell you about Foust Company's financial strategy including the level of risk involved in the business? How could the company use WACC calculations in determining future investments? You did not provide any specific...
July 15, 2007

Financial Management
If you make an extra \$50.00 principal payment per month, what are the opportunity cost considerations? The sites listed below should be of help to you. 4 Financial Statements http://www.quickmba.com/accounting/fin/statements/ Beginners' Guide to Financial Statements http...
July 5, 2007

Chemistry
Find the pH and pOH of a solution that is 1.04x10^-4 M HCl. Do i have to use an ice table to solve this? or is there a short cut? please help No. HCl is a strong acid (100% ionized), so the H^+ concentration is 1.04 x 10^-4 M.
July 4, 2007

math
Find the matrix which represents(a)a reflection(b)a half turn abt 0(c)a reflection in the line y=x).plz help me...)
July 4, 2007

Financial management
If you deposit money today into an account that pays 6.5 percent interest, how long will it take for you to double your money? You can get a pretty good estimate by using the Rule of 72. Divvied 72 by 6.5 to obtain your answer. The formula depends on when the interest is ...
July 3, 2007

Maths
There are two boxplots, 1 of class A and the other of class B. they both illustrate the height of sunflowers grown in metres. Class A : minimum is 0.9 m, Q3 is 2 m Q1 is 1.5 m ,maximum is 2.8 m Median is 1.9 m Class B : minimum is 1.5 m, Q3 is 2.3 Q1 is 1.8 m, maximum is 2.5 m...
June 9, 2007

Social Studies
How did ancient texts and statues affect Renaissance scholars? Renaissance means rebirth. During the Renaissance scholars studied ancient texts and the classical statues became popular again. Check this article for more information. http://en.wikipedia.org/wiki/Renaissance
April 17, 2007

Econ-Returns to scale
Increasing returns to scale
March 10, 2007

help me for this stupid worksheet
1 2 3 4 5 6 7 8 9 10 11 12 IT WA NT ED TO BE TH EN IG HT MA RE
January 31, 2007

science
What is the phase of neon at room temperature? This will give you all the information you ever wanted about Ne. Click on element #10 http://www.webelements.com/
January 30, 2007