Sunday
May 1, 2016

# Posts by martin

Total # Posts: 201

Physics
What's the acceleration you're told to use in your class? 9.8m/s^2? 10m/s^2? 9.81m/s^2? I'll go with 10 because I'm lazy, just substitute to whatever you guys are using. The first ball (dropped from rest) will take 2 seconds to reach the ground : 20 = 5 x t^2 ...
August 28, 2011

Physics
x = x0 + v0*t + 1/2*a*t^2 x0=1.5 v0=-3 a=-10 (or something close, depending on what you're told to use in your class). You want the time for when x=0 (where 0m = the bottom of the window). 0 = 1.5 - 3 x t - 5 x t^2 1.5 = 3xt + 5xt^2 0=5t^2 +3t -1.5 You use the quadratic ...
August 28, 2011

Accounting
You didn't actually ask a question. Just saying.
August 28, 2011

Math
First, count the number of p and y in one pattern. Then, multiply these respective numbers by 4 because you need 4 times these patterns for one necklace. Then you multiply by 8 because you want 8 such necklaces. One pattern : y=4, p=10 One necklace : y = 4 x 4 = 16, p = 10 x 4...
August 28, 2011

algebra
variance = 4, so standard deviation = 2 (because squareroot of 4 is 2) 160 - 166 = -6 = -3 standard deviation. You take out a normal distribution table and you find out that a standard deviation of -3 or less happens only 0.13% of the time. Answer : 0.13%
August 27, 2011

algebra
230% of the distance from Boston to St. Louis = 2.3 times the distance from Boston to St. Louis With that information, you have that : 2.3 x (distance from Boston to St. Louis) = 2410 And you just divide both side of the equation by 2.3. 2410 divided by 2.3 is very close to 1048.
August 27, 2011

basic statistics for the behavioral sciences
a) 11 + 1 (you) = 12. 12/80 = 0.15 = 15% b)40% = 0.4, 0.4 x 80 = 32. c) 7.5% = 0.075, 0.075 x 80 = 6 Also, 0.5% x 80 = 0.005 x 80 = 0.4 students, which doesn't make sense.
August 27, 2011

alegbra
0.82 - 0.8 = 0.02 0.02/0.01 = 2 standard deviations You check a normal distribution table (unless you were provided with the value for 2 standard deviation already) You get : Greater than 2 standard deviation = 1 - 0.9772 = 0.0228
August 27, 2011

math
At T=0, which is when we're in 1991, we want E(0)=73.7. The slope in front of T is found as follow : (76.9 - 73.7) divided by (1997-1991) = 0.53333~ = 8/15 This mean thay the life expectancy would increase by 8/15th of a year every year. In short, E(T) = 8/15 x T + 73.7 ...
August 27, 2011

Geometry
A side has 5x5=25 square feet. A box has 6 sides. 6 x 25 = 150 square feet. 4 cents per foot : 150 x 4 = 600 cents = \$6 per boxes 100 boxes : 6 x 100 = 600\$ total. Those are some costly boxes. Then again, they are very big boxes.
August 27, 2011

math
August 26, 2011

math
Just try them quickly, there's a more formal method, but it'd be much more complicated for such a simple problem. They want only even numbers. You can quickly see 10 x 12 = 120 is smaller than 224 and 18 x 20 = 360 is too big. You're left with 12 x 14, 14 x 16, etc...
August 26, 2011

math
14 and 16.
August 26, 2011

Geometry
Well, the only thing I can see "lacking" in the definition is if the intersection P is actually also one of the A,B,C,D points. So you could just say ""If line AB and line CD intersect at point P such that P is different from A, B, C or D, then angle APC ...
August 26, 2011

trig
Cot (theta) is just 1/(Tan(theta)). So we have 0.05 = 1/(Tan(theta)) And thus, by multiplying both side by Tan(theta), we have : 0.05 x Tan(theta)= 1 So Tan(theta)= 1/0.05 = 20 Tan (theta) = 20
August 26, 2011

statistics
1) 300 is two deviations of 50 away from 200, so the standard score is 2. 2) You need to look at a normal distribution for this. A quick google search should help you just fine. Or, possibly, you were provided one in class. From such a table, you can see that being two ...
August 26, 2011

alegbra
PsyDAG is wrong, I believe. The odds are 1/(10,000+1) or 1/10,001.
August 26, 2011

5/90 lotto winning numbers
LOTTERY IS A MYSTERY THAT NEEDS LOT OF RESEARCH AND TOP CONNECTIONS.
July 14, 2011

Chemistry
A reaction proceeds according to the following mechanism: Cl2 ⇌ 2 Cl (fast equilibrium) Cl + H2 ⇌ H2Cl (fast equilibrium) H2Cl + Cl → 2 HCl (slow) What is the rate law for this reaction?
June 25, 2011

Chemistry
Consider the voltaic cell: Zn(s) / Zn2+(aq) // H+(aq) / H2(g) / Pt(s) Calculate the value of Ecell, in V, when [Zn2+] =1.00 M and [H+] = 0.00100 M DATA: Zn2+(aq) +2 e¯ ---> Zn(s);Eo = - 0.76 V 2 H+(aq) + 2 e¯ ---> H2(g);Eo = 0.00 V
June 19, 2011

Mat 116 Algebra 1A
7[3m-(m+2)]>-6(m+3) Use set-builder notation to describe the complete solution {m|m > ? } (type an equality symbol; then type an integer or a simplified fraction.)
June 16, 2011

Science
look at 6th grade project sites that is great place to start
May 21, 2011

comper science
write a program that accept the name of a student score obtained in 5 courses and compute the average score of the student.your program must display the name of that student on tab 5
May 12, 2011

5 of 90 lotto equation formula
I HAVE A LOTTO CHART THAT EXPLAINS IN ALL
March 30, 2011

physics
A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by angle 1 = 50° from its original direction, and the struck ball moves off at angle 2 = 29° from the original direction (...
March 9, 2011

physics
A ball moving with a speed of 26 m/s strikes an identical ball that is initially at rest. After the collision, the incoming ball has been deviated by 1 = 50° from its original direction, and the struck ball moves off at 2 = 29° from the original direction (Fig. 9-37). ...
March 9, 2011

Physics
A 10-kg duffle bag is undergoing a vertical acceleration of 0.050 m/s2 (positive for up, negative for down), while its owner is holding it with an upward force. What is the magnitude of this force?
February 25, 2011

Physics
A student applies an upward force of 58 N to a 5.1-kg physics textbook. Find the book’s acceleration (positive for up, negative for down).
February 25, 2011

analogies
What is the answer?
February 23, 2011

math
the base of a triangle is the same as its height. what are the least whole number measurements for the triangle so that the area would be greater than 144 ft square?
February 10, 2011

math
the base of a triangle is the same as its height. what are the least whole number measurements for the triangle so that the area would be greater than 144 ft square?
February 10, 2011

CIS!!%
make a flow chart and a hierarchy chart for a small software company that need to calculate there employee pay and rate of pay with OT
January 30, 2011

biology
A gene for flower color can have multiple alleles like purple, white, or red. true or false?
January 25, 2011

biology
Suppose you have monohybrid snapdragons in your garden and you find that they produce red seeds to white seeds in the ratio of 3:1. If the alleles are designated R (red seeds) and r (white seeds), what are the probable phenotypes of the parents (P1)? a all white b all red c ...
January 25, 2011

write three ways to find 3x2x4
January 13, 2011

Chemistry
are molecules that are polar in nature assymetrical or symmetrical ?i think assymetrical ?
January 5, 2011

Chem
wait is it 24 moles ?
January 3, 2011

Chem
i meant 12* moles
January 3, 2011

Chem
so the answer is 2 moles ?
January 3, 2011

Chem
given the balanced equation: 2Al2O3(s)-->4Al(s)+302(g) What is the total number of moles of O2 that are produced when 8.0 mol of Al2O3(s)are totally decomposed ? please help me.
January 3, 2011

calculus 1
find the total area between the curves ( y= 4-x ^2 ) and the x-axis over the intervals [0,4]
November 19, 2010

calculus 1
find the total area between the curve ( y= 4-x to the second power) and the x-axis over the interval [-3,7]
November 19, 2010

5th math
How many 3,000s in 270,000
October 26, 2010

Probability help
The heights of the buildings are normally distributed. The mean of the heights is 275 feet and the standard deviation is 30 feet. A. What is the probability that the buildings height is over 280 feet? B. What is the probability that a sample of 80 buildings is gathered and the...
October 14, 2010

chemistry
URGENT!! You wish to prepare 1 L of a 0.02 M potassium iodate solution. You require that the final concentration be within 1% of 0.02 M and that the concentration must be known accurately to the fourth decimal place. How would you prepare this solution? Specify the glassware ...
October 11, 2010

English
The Great Coral Reef almost circles New Zealand and it has more marine life than anywhere else in the world.
October 5, 2010

chem - freezing point
b. What is the freezing point depression when 153 g of bromine is added to 100 g of benzene?
October 4, 2010

math
The atomic number of cadium is half the atomic number of curium. Define a variable and write an expression for the atomic number of cadmium. I'm working in a group with my friends and we need help we're not the same people.
September 8, 2010

CIS115
I need to make a program for a small software company to calculate there empolyee pay and make a flow chart with a hierarchy chart that show loops that will allow user to continue processing employee pay until the program user want to stop. For the maximum number of employee ...
September 3, 2010

teacher aide
how children learn
June 7, 2010

Acoustics: Noise Vibration and Noise Control
Did you get any further forward with this Chris? I've got the same issues with the same question.
April 18, 2010

language please check these
ARE THESE CORRECT(do they make sense to u): -he is a columnist -the remedy is working -you will recieve a bonous -i don't know a reason -i bought an anniversary gift -the jewel is expensive -may i borrow an almanac -kate wants the checkersthe signature was forged thank you...
April 15, 2010

physics
If ball c slid down the hill without friction, how fast would it be traveling the instant it reached the bottom of the hill?
March 12, 2010

fractions greatest to least
March 5, 2010

riddle
i got these hints too HINT : password has no capital letters HINT : those who know me will say 3 and those who don't 4 HINT : password=CHAR[onceeveryfouryear-11]
February 2, 2010

riddle
yes..it was written like that
February 2, 2010

riddle
nothing is not the answer:(
February 2, 2010

riddle
could anyone please solve this riddle : I am what you cannot be but you once were what i will become i am what only blind can see and of infinity and 1 i am the sum i am the cure and i am the cancer?
February 2, 2010

math
1 x+2=3 - 10
January 26, 2010

Statistics
How do you code your data?
October 30, 2009

Statistics
How do you code your data?
October 30, 2009

Statistics
When is the Analysis of Variance or ANOVA test used?
October 18, 2009

Statistics
What is the Central Limit Theorem and how can it be used in statistics?
October 14, 2009

Statistics
I have to sample 300 persons. How do I go about doing this and how do I know that the population I have chosen has the characteristics that I am looking for?
October 14, 2009

math word problem
Case Eastern Junior College awarded 26 varsity letters in crew, 15 in swimming, and 16 in scoccer. If awards went to 46 students and only 2 lettered in all sports, how many students lettered in two of the three sports?
August 8, 2009

math
a=9b,for b the solution is b=
July 20, 2009

Macroeconomics
Which of the following aren't included in the measurement of GDP? Exports Personal income Consumption spending Government spending on goods and services Transfer payments Net interest Imports Investment spending
June 30, 2009

Chemistry
Calculate the rate at which N2O4 is formed in the following reaction at the moment in time when NO2 is being consumed at a rate of 0.0521 M/s. 2NO2(g) <-> N2O4 (g) I am not really sure how to go about this problem. rate = k (N2O4) d(NO2)/dt = -2 d(N2O4)/dt This is what I...
May 19, 2009

Hi First off, I do not know anything about US auto parts. I want to know how strong the competition is here. Who are the big players? If you have any relevant articles as well, i would be happy. Thanks in advance Martin
December 11, 2008

math
so is it 50?
December 10, 2008

math
a pasta machine costs \$33.The ingredients to make one batch of pasta cost \$.33.The same amouunt of pasta puchased at a store costs \$.99.How many batches of pasta will you have to make for the cost of the machine and ingrediants to eequal the cost of buying the same amount of ...
December 10, 2008

pre-algebra
your family is driving to houston,texas.A sign indicates that you are 700 miles from houston.Your car's trip odometer indicates you are 400 miles from home.YOu are traveling at an average speed of 60 miles per hour. A. write an expression for the distance(in miles) you ...
December 9, 2008

math
um im sorry i still dont understand this
December 9, 2008

math
your family is driving to houston,texas.A sign indicates that you are 700 miles from houston.Your car's trip odometer indicates you are 400 miles from home.YOu are traveling at an average speed of 60 miles per hour. A. write an expression for the distance(in miles) you ...
December 9, 2008

World History
How are the political systems of the Persian Empire and Greece alike?
October 5, 2008

World History
How are the Assyrian and Phoenician empires alike?
October 5, 2008

Social Studies
Once a group of people have settled in one location, what happens next?
September 18, 2008

health
Yes I did, there is no text in our books relating to this particular question. I have checked already.
July 21, 2008

health
What other reform efforts might be instituted to improve caregivers socialization skills?
July 21, 2008

health
what types of reform efforts are being implemented to improve caregivers socialization skills?
July 21, 2008

science
what is the life cycle of moss
May 14, 2008

Is this a correct english sentence?
Thanks for the help, both of you! Btw, writeacher, it's taken out from a danish book, and it's in past tense, so it shall not be in present.. But thanks
May 10, 2008

Is this a correct english sentence?
My father had two sons, from whom I was the oldest, and two daughters. Sorry for the inconveinience, but I'm not English, and I've got some translation to do
May 10, 2008

english literature
thank u very much but the 4th paragraph tells about his writings only about the natural beauty and so on ...but it doesn't tell about other aspects like...social or political where can i find that? i have to write research paper based on 3 works of keats social.......
April 14, 2008

english literature
i am writing a research paper about JOHN KEATS and his 3 works ( social political religious or any)_ but i didn't find some of the things about him. my question is: WHAT ARE THE SOCIAL POLITICAL AND RELIGIOUS CONTRIBUTION OF JOHN KEATS TO THE ENGLISH LITERATURE? or any 3 ...
April 14, 2008

physics
1.A proton enters a 2.0 X 10^-2 T magnetic field with a speed of 5.8 X 10^4 m/s. What is the radius of the circular path it follows? formula?? 2.Electrons moving at 3.5 X 10^4 m/s pass through an electric field with an intensity of 5.6 X 10^3 N/C. How large a magnetic field ...
April 9, 2008

english
"Life begets life. Energy creates energy. It is by spending oneself that one becomes rich.” what does this quote mean??
April 7, 2008

science
A step-up transformer has 120 turns on its primary coil. It has 1150 turns on its secondary coil. The primary circuit is supplied with an alternating current at 120 V. The current in the secondary circuit is 2.4 A. What current is in the primary circuit? formula??
April 3, 2008

Microecon
Hi, I've got a question about producer surplus. I know that the magnitude of producer surplus would depend on the elasticity of supply, but i don't know why... Please explain. Thank you!
March 29, 2008

mats
Volume of a cube is caculated by height x length x width... since they are all equal, root 512 by 3, which would give you 8 cm. to calculate its surface area, find the area of one side first then multiply that by 6, coz a cube has 6 sides.
March 28, 2008

Calculus
A leaky cylindrical oilcan has a diameter of 4 inches and a height of 6 inches. The can is full of oil and is leaking at the rate of 2 cubic inches/hr. The oil leaks into an empty conical cup with a diameter of 8 inches and a height of 8 inches. a. At what rate is the depth of...
February 23, 2008

English
For the past few hours, I've been toiling away at this impossible passage's question set. If anyone can help, I will be forever grateful! :) "And, if I hold the true anatomy of myself, I am delineated and naturally framed to such a piece of virtue,--for I am of a ...
January 4, 2008

BEH / 225
On the text from BEH/225 on the book Personality Ch.11 pp. 421 on the summary table Defence Mechanisms. What defense mechanisms have you noticed in the people around you? What do you see as the advantages and disadvantages of these defence mechnaisms?
December 13, 2007

Physics
the masses cancel
November 30, 2007

integrated science
what is.. the modem system of units used by scientists? what is.. the curved surface of a liquid? what is.. a process used to find the volume of an irregularly shaped object? (1) S. I. (International scientific) (2) meniscus (3) total immersion (liquid displacement) The SI set...
August 7, 2007

Econ MC
d. \$0.30
April 17, 2007

Biology
Hi there, Describe the role of bacteria in biotechnology and genetic engineering. I'd appreciate the help. Thanks. Since this is not my area of expertise, I searched Google under the key words "bacteria biotechnology" to get these possible sources: http://encarta...
March 19, 2007

Mirco economics
Endownment in economics is the value one places on a certain object... so in this case, i think fixed endowment just means u wud value the oranges as much as the apples
November 4, 2006

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