Friday

December 2, 2016
Total # Posts: 211

**Chemistry**

Dr, I have another question, but first, thank you for showing me that I was on the right track. I didn't understand how the moles of HCl were distributed. I thought .02 moles of HCl meant that there were .02 moles of H and .02 moles of Cl. Now I know that HCl add up to .02...

*October 22, 2011*

**Chemistry**

How many mole of H2 will be produced if 0.500 grams of magnesium is reacted with 10.00mL of 2.0 M HCl? I've concluded the answer is 0.02 moles of H2, but I'm doubting myself a lot because I don't understand the aspects of the balanced chemical equation and how that...

*October 22, 2011*

**Chemistry, Need Help!!**

if you have 150g of nano3 how many mole are there

*October 3, 2011*

**Physcial Science**

Alpha particle tracks through gases and thin metal foils show few deflections. What does this tell us about the atom?

*October 2, 2011*

**Physical Science**

What fuel other than uranuin can be used in a nuclear reactor?

*October 2, 2011*

**Math**

Cause i wasn't really sure

*September 15, 2011*

**Math**

Is it possible to find out how long is the wall? The choices shown for the problem are: (a) 8 feet (b) 12 feet (c) 14 feet (d) 15 / 9 feet (e) None of these. Because I had put down (e) none of these.

*September 15, 2011*

**Math**

A scale drawing of an office building is not labeled but indicates 1 / 3 inch = 4 feet. On the drawing one wall measures 4 and 2 / 3 inches. How long is the wall?

*September 15, 2011*

**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*

**algebra**

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**

Stop spamming, I already answered you.

*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*

**algebra**

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*

**physics**

=4.26

*February 21, 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*

**third grade math**

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*

**chemistry**

in my opinion, since diamond cotain carbon and hydrogen atoms, it is a mixture and a homogeneous one at that matter because its components are not easily distinguished by simple observation

*September 4, 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 receive 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*

**5th grade Math**

fractions greatest to least

*March 5, 2010*

**riddle**

Darkness

*February 2, 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*

**Business**

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 don't 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*