Friday
August 28, 2015

Posts by anon


Total # Posts: 1,727

chemistry
It's Tetrahedral, the others i don't know.
June 1, 2013

Chemistry
Nope. just checked. though there might be a third correct answer...
May 31, 2013

chemistry
it's wrong. why is it wrong?
May 31, 2013

chemistry
THEN HOW DO YOU DO A)?
May 31, 2013

Math
Create a 3rd degree polynomial with real coefficients that has roots -1 and 4i. Write your answer in form ax^3 + bx^2 + cx+ d .
May 24, 2013

Math
Create a 3rd degree polynomial with real coefficients that has roots -1 and 4i. Write your answer in form ax^3 + bx^2 + cx+ .
May 24, 2013

Science
Explain if quadruplets-four babies born at one birth are always identical or always fraternal, or if they can be either.
May 23, 2013

Engineering
Please post the answers for 1_4 and 1_5
May 23, 2013

Civil War
What book caused many people in the north to look at slavery as a moral issue?
May 21, 2013

Civil War
The Fugitive Slave Law was criticized because it
May 21, 2013

algebra
1) how many billions of years will it take 1000 grams of uranium-238 to decay to just 125 grams? 2) a researcher had 37.5 g left from a 600 g sample of sulfer-35. how many half-lives passed during that time? 3) look at problem 2. how many days passed during that time?
May 9, 2013

algebra
a number cube is rolled 2 times in a row. what is the probability of rolling a number greater than 2 both times?
May 7, 2013

Pre calc
Projectiles are always parabolas
May 6, 2013

physics
A meter stick is suspended vertically at a pivot point 27 cm from the top end. It is rotated on the pivot until it is horizontal and then released from rest. What will be its maximum angular velocity (in radians/second)?
May 6, 2013

physics
While waiting to board a helicopter, you notice that the rotor's motion changed from 340 rev/min to 265 rev/min in one minute. Assuming that this acceleration remains constant, calculate how much longer (in seconds) it will take for the rotor to stop.
May 6, 2013

Algebra 1
(-2+x) (1+2x)
May 6, 2013

Function
Write a function rule for the area of a parallelogram whose base is 4 inches more than its height. What is the area of the parallelogram when its height is 8 inches?
May 6, 2013

Function
Fahrenheit and Celsius are two measures of temperature. The temperature in degrees Celsius is equal to five ninths of 32 less than the temperature in degrees Fahrenheit. What is a function rule that represents this situation?
May 6, 2013

Functions?
find the range of f(x) = -2x+6 for the domain {-1,3,7,9}
May 6, 2013

Chemistry
n is the moles of No
May 6, 2013

Chemistry
use your ideal gas formula, but first find the limiting reagent to find the moles of NO. Then to find volume V=(nRT)/P assume pressure to be one and temperature to be 273K R is the constant .08206. Hoped it helped. The total volume is 12.50+20 (this is true because of the law ...
May 6, 2013

Physics Plz help me
5.98x10^6
May 6, 2013

Math
Larry is 74 inches tall and his shadow is 70 inches long. At what degree is the elevation is the sun?
May 4, 2013

algebra
Beginning with cars made in 1981, all vehicles must contain a 17-digit Vehicle Identification Number (VIN). The first 3 positions must be letters or numbers, position 4 and 5 must be letters, positions 6 and 7 must be numbers, position 8 can be a letter or a number, position 9...
May 2, 2013

chemistry: please check answers.
This are all right
April 30, 2013

social studies
again with the articles haha "An article on Abraham Lincoln's rise to the presidency (this should NOT be about his presidency but what he had to do to become president and his struggles to become one)"
April 29, 2013

social studies
I'm doing a project and I need a atricle on John Brown. (Like Who was he? What did he do? What happened to him? Do I agree? and why? but I'm looking for a article and don't find one
April 29, 2013

Algebra
Find an equation for the line with y-intercept 3 that is perpendicular to the line 3y=2x-4. A. 2y=6-3x B. 2y=3x+6 C. 3y=9-2x D. 3y=2x+9
April 29, 2013

Algebra
(4x^2-2x+8) - (x^2+3x-2)=
April 29, 2013

Chemistry
Thanks.
April 27, 2013

Chemistry
Which of the following will increase the strength of a sample of 90% SiO2 - 10% MgO Quench the entire sample in water Quench half of the sample in water Cool the entire sample with air jets Cool half the sample with air Submerge the sample in a salt bath of Na2O Submerge the ...
April 27, 2013

chemistry
Correction, it's right. WHY it is right though, that is the question. After all, who would want to know how to do a similar question where internet access is disallowed? Anyone who hasn't just stumbled onto the question, or already knows how, that's who.
April 26, 2013

chemistry
it's wrong....
April 26, 2013

Physics
X10 are done now
April 26, 2013

Physics
you need to make sure you use the right value for I
April 26, 2013

Physics
yes i did and i also said you need to use mu/4pi
April 26, 2013

Physics
(I*10^(-7))/(2*(z-R))
April 26, 2013

Physics
mu = 4pi * 10^(-7)
April 26, 2013

Physics
yes but you need mu/4pi
April 26, 2013

Physics
correct
April 26, 2013

Physics
you are missing the current I in b
April 26, 2013

Physics
yes it is good
April 26, 2013

Physics
You should be using mu/4pi for answer in b
April 26, 2013

chemistry
Quench the entire sample in water Quench half of the sample in water Cool the entire sample with air jets Cool half the sample with air Submerge the sample in a salt bath of Na2O Submerge the sample in a salt bath of CaO
April 26, 2013

Chemistry
Calculate the density of atoms on plane (001) in Lithium
April 26, 2013

chemistry
Am i the only one to make the obvious question here? If we knew how we got the answer, we could spot a mistake that might have been overlooked this entire time. How did we get the answer?
April 26, 2013

Physics :(( help please TT
Where is the picture?
April 23, 2013

physics
last option
April 19, 2013

First-Year Physics
Question: s22.postimg[dot]org/comasgagh/untitled.png From my calculations, option A is correct. What am I doing wrong? Also, I can't find a relationship between amplitude and energy. Attempt: s9.postimg[dot]org/8shnsrjbj/daum_equation_1366155192269.png
April 16, 2013

social studies?
Before the invention of the cotton gin, how were seeds removed from cotton fiber?
April 16, 2013

Quantum Physics
Please Q 7 and 8!
April 16, 2013

Quantum Physics
WORKING ON IT AR . DISTRACTED BY SOME PERSONAL PROBLEMS IN LIFE ... NOT ABLE TO CONCENTRATE
April 16, 2013

Quantum Physics
the above answers to 5th question is of assignment 6 problem 5 dont get misguided
April 16, 2013

Quantum Physics
problem 5,7 please.
April 16, 2013

Quantum Physics
I meant answer to question 1 is part c. -z-h- -x-h-
April 16, 2013

Quantum Physics
3B is Z
April 16, 2013

Quantum Physics
1st is part c): -z-h- -x-h-
April 16, 2013

algebra
in the past professional baseball was played at the astrodome in Houston, Texas. the astrodome has a maximum height of 63.4 m. the height of a baseball t seconds after it is hit straight up in the air with a velocity of 45 ft/s is given by h = -9.8t + 45t + 1. will a baseball ...
April 11, 2013

History
What are some of the toughest hardships that emigrants faced along the oregon trail?
April 9, 2013

History
Why did people move west in the 1800s?
April 9, 2013

algebra
solve for x: x-18 =64
April 8, 2013

Years ?
"In the early 1930s" what years are those like 1900-1930 right?
April 8, 2013

Reading/Maps
This is what I have to do "Draw a map of mainland U.S.A. and show (draw)how the mississippi river divides the country (part of the labeling) and label both sides correctly." I was wondering if you can find me a map that way I can start it off like how exactly do I do...
April 8, 2013

Science
what should you consider when you plan a title for a graph?
April 7, 2013

um math
what does a circle graph show that a bar graph does not?
April 7, 2013

science asap
Air pressure decreases as altitude increases ^ which one goes on the horizontal axis and which one goes vertical axis? how did you choose this scale? (This is for a line graph)
April 7, 2013

writing
how can i reword this differently Free will is God’s indispensable gift to humanity, and we must allow ourselves to be open to salvation in light of the choices we make.
April 6, 2013

math
-5 and 5/2 are both correct answers
April 4, 2013

math
Katie, how is that relevant to the question? We're here to answer questions, not ask them.
April 3, 2013

geography
Ok thanks for the help :) the answer for the 2 was A, but I do see what you were saying about C. Since everyone is the same age that would allow more cultural similarities, but I guess us being in a jungle would be more about being stranded than actually living in a jungle. I ...
April 2, 2013

geography
Should it be B and A? I was kind of unsure of 1 because A seemed too obvious.
April 2, 2013

geography
Check my answers, please? I put an asterisk next to which ever ones are my answer. Thanks! Why do you think the Inuit have retained aspects of their early culture? *A.because they are used to that lifestyle B.because such adaptations allow them to survive in their environment ...
April 2, 2013

Algebra 8th grade
3a + 5b = 70 6a + 9b = 135
April 1, 2013

Chemistry
Nvm it was -1.02*10^3 KJ
April 1, 2013

Chemistry
Calculate the standard free-energy change for the following reaction at 25 C degrees. 2Au^3+(aq)+3Ni(s) <-- --> 2Au(s)+3Ni^2+(aq) Ni2+(aq) + 2e- -> Ni(s) E=-0.26 Au3+(aq) + 3e- -> Au(s) E=+1.498 G= ? KJ Would it be G=1.758? •Chemistry - DrBob222, Sunday, March...
April 1, 2013

Chemistry
A galvanic (voltaic) cell consists of an electrode composed of magnesium in a 1.0 M magnesium ion solution and another electrode composed of copper in a 1.0 M copper(I) ion solution, connected by a salt bridge. Calculate the standard potential for this cell at 25 dC.
April 1, 2013

Chemistry
It is still wrong.
March 31, 2013

Chemistry
I got -1.02*10^6 but it is wrong.
March 31, 2013

Chemistry
Calculate the standard free-energy change for the following reaction at 25 C degrees. 2Au^3+(aq)+3Ni(s) <-- --> 2Au(s)+3Ni^2+(aq) Ni2+(aq) + 2e¨C ¡ú Ni(s) E=¨C0.26 Au3+(aq) + 3e¨C ¡ú Au(s) E=+1.498 G= ? KJ Would it be G=1.758?
March 31, 2013

Chemistry
So would it be X^2+ and Y^2+?
March 31, 2013

Chemistry
X^2+ + 2e- -> X(s) E=1.73V Y^2+ + 2e- -> Y(s) E=0.40v Which pair of species would react under standard conditions? X^2+ and Y^2+ X and Y^2+ X and Y X^2+ and Y Would it be X and Y because the E is positive?
March 31, 2013

Chemistry
Calculate the cell potential for the following reaction as written at 59 ¡ãC, given that [Cr2+] = 0.763 M and [Sn2+] = 0.0170 M. Standard reduction potentials: Sn2+(aq) + 2e¨C ¡ú Sn(s) E=¨C0.14 Cr2+(aq) + 2e¨C ¡ú Cr(s) E=¨...
March 29, 2013

Chemistry
Which of the following reagents would oxidize Cr to Cr2 , but not Fe to Fe3 ? Ca Co Ca2+ Br2 Co2+ Br- Which of the following reagents would oxidize Cu to Cu2 , but not Cl– to Cl2? Br2 Ca Co2+ Co Br- Ca2+
March 29, 2013

Chemistry
A current of 5.61 A is pass through a Ni(NO3)2 solution. How long (in hours) would this current have to be applied to plate out 9.00 g of nickel?
March 29, 2013

Chemistry
A current of 4.60 A is passed through a Pb(NO3)2 solution for 1.20 hours. How much lead is plated out of the solution?
March 29, 2013

chemistry
a) deprotonation of the alcohol
March 29, 2013

algebra 10th grade
Checking algebra answers, Is it correct 320km/1hr ↓ 320km /1hr →1m/1.609km =320m/1.609hr÷=199.3mph Answer: Round to nearest 10th =198.9mph
March 28, 2013

Physics
A 85-kg snow skier is being pulled up a 17 ° slope by a steel (Young's modulus 2.0 x 1011 N/m2) cable. The cable has a cross-section area of 7.4 x 10-5 m2. The cable applies a force to the skier, and, in doing so, the cable stretches by 2.6 x 10-4 m. A frictional ...
March 27, 2013

Pre calculus
How do I solve this exponent problem? I understand the exponent rules, but I getting 1 but 1 is not the answer! I don't want anyone to solve the problem for me, I want to learn how to solve this type of problem. Thank you! Solve the equation: -8=-3-6 (3sqrtx^2) Thanks again!
March 27, 2013

maths
This is a question from Brilliant dot org.
March 26, 2013

Science
Are compounds chemical or physical changes of matter?
March 22, 2013

Science 8th grade
what gets hot and cold faster, solid or gas and why?
March 22, 2013

Quantum Physics
Please help for Q9!
March 20, 2013

Biology
To take the energy from an exergonic reaction and use it to power an endergonic reaction, a cell can: create the energy for the endergonic reaction to occur. Why is this false? I thought a exergonic reaction create energy for the endergonic reaction to occur?
March 18, 2013

Chemistry
Sodium sulfate is slowly added to a solution containing 0.0500 M Ca^2+ (aq) and 0.0390 M Ag^+ (aq). What will be the concentration of Ca^2+ (aq) when Ag2SO4(s) begins to precipitate? What percentage of the Ca^2+ (aq) can be separated from the Ag^+ (aq) by selective ...
March 17, 2013

Chemsitry
The Ksp of PbBr2 is 6.60× 10^–6. What is the molar solubility of PbBr2 in pure water? What is the molar solubility of PbBr2 in 0.500 M KBr solution? What is the molar solubility of PbBr2 in a 0.500 M Pb(NO3)2 solution?
March 17, 2013

Chemistry
At 22 °C an excess amount of a generic metal hydroxide M(OH)2, is mixed with pure water. The resulting equilibrium solution has a pH of 10.49. What is the Ksp of the salt at 22 °C? Is the ksp=1.38*10^-11?
March 17, 2013

Chemistry
My calculator only show up to the 1.0*10^-9 not 1.46*10^-9. Thanks
March 17, 2013

Chemistry
The answer is wrong. ksp is not 1.00*10^-9
March 17, 2013

Chemistry
Is the answer 1.50*10^-14?
March 17, 2013

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