Monday
October 20, 2014

Posts by Aa


Total # Posts: 59

Big Data
{12,18} → 36
October 6, 2014

Civics
True or False: The governor has similar powers to the president?
May 26, 2014

Math
51
February 25, 2014

Chemistry
It's a tripeptide. It doesn't explain how it's adjusted.
October 17, 2013

Chemistry
PLEASE HELP!! 40 mL of 0.1 M solution of a weak acid (adjusted to a pH of 7.75) is titrated with 0.2 M HCl to a final pH of 2.1. Once the pH of the weak acid reaches 2.1, it is then titrated with 20 mL of 0.25 NaOH. What is the final pH of the solution? pKa values are 2, 6, ...
October 17, 2013

Chemistry
The final concentration is 1 M
October 9, 2013

Chemistry
How do I prepare 30 mL of NaOH by dissolving it in water?
October 9, 2013

Chemistry
Thank you so much!
October 8, 2013

Chemistry
PLEASE HELP. If I have 0.10 mL of 200 mcg/mL protein, 0.90 mL of distilled water, and 2.00 mL of Bradford reagent, what is the concentration of the protein?
October 8, 2013

Chemistry
How do I convert micrograms/mL to micromol/L? Thanks
October 7, 2013

Science
Which statement best describes the relationship between science and technology? A. The goal of science is to gain an understanding of the natural world, while the goal of technology is to use that understanding to improve people's lives. B. The goal of science is to create...
September 30, 2013

math
25
June 7, 2013

Geometry
ABC is a triangle with a right angle at A. M and N are points on BC such that AM is the altitude, and AN is the angle bisector of A. If CN/NB=21, what is CM/MB ?
May 13, 2013

Physics
200
May 6, 2013

science
why is a blue star cuz of temperatuure or location
May 1, 2013

science
a propane gas reacts with oxygen to produce carbon dioaxide and water is this heat energy or nucler energy
May 1, 2013

science
a propane gas reacts with oxygen to produce carbon dioaxide and water is this heat energy or nucler energy
May 1, 2013

science
Does the moon reflect or absorb sunlight?
May 1, 2013

science
a student went downhill from a flatsurface on a skateboard is this increase in friction or increse in velocity
May 1, 2013

science
a student went downhill from a flatsurface on a skateboard is this increase in friction or increse in velocity
May 1, 2013

algebra
what is the opposite of -12 3/4 -12 is the whole number what is the opposite of that is it 51/4
April 6, 2013

aqueous solution
How many grams of NiF2 are there in 201 grams of an aqueous solution that is 12.8 % by weight NiF2.
March 21, 2013

Physics
A spherical concave mirror has a raduis of curvature of 6.0 cm. At what distance from the mirror should a 6.0 cm object be placed to obtain an image that is 48 cm tall?
February 26, 2013

Statistics
How will I know the modal class from a grouped data w/ equal class sizes if the highest frequency is 7 but then it appears thrice in 3 intervals. 34.00 - 39.69 frequency: 7 39.70- 45.39 frequency: 7 62.50-68.19 frequency: 7
January 29, 2013

Math
7x-3y+4z=18 13x+6y+8z=30 11x-9y-12z=16 Find x,y,z
January 17, 2013

Math
Yes please. that's the given. Well It's a bit odd because i wanted to use Cramer's rule.
January 17, 2013

Math
Find x,y,z (solution set) 2x+y+32=13 x+3y-z=4 23x-2y+4z=11
January 17, 2013

Math (Help please)
Tnx! :D
January 16, 2013

Math (Help please)
Find the points on y=(-x^2+4x-3)^3 that has a horizontal tangent line.
January 16, 2013

physics
you are to determine the amount of sugar dissolved in solution. how can you use polaroid filters to complete the task?
November 25, 2012

physics
two objects repel each other. can we be sure they are both electrically charged? how can we know which sign of charge? two objects attract each other. can we be sure both are electrically charged?
October 20, 2012

math
A number made up of the digits 4,5,and 6 is subtracted from a number made up of the digits of 0,2,8. The difference ia 157. Write out the entire problem?
October 18, 2012

physical
From t = 0 to t = 3.30 min, a man stands still, and from t = 3.30 min to t = 6.60 min, he walks briskly in a straight line at a constant speed of 1.76 m/s. What are (a) his average velocity vavg and (b) his average acceleration aavg in the time interval 1.00 min to 4.30 min? ...
September 20, 2012

physical
From t = 0 to t = 3.30 min, a man stands still, and from t = 3.30 min to t = 6.60 min, he walks briskly in a straight line at a constant speed of 1.76 m/s. What are (a) his average velocity vavg and (b) his average acceleration aavg in the time interval 1.00 min to 4.30 min? ...
September 20, 2012

chemistry
A solution is prepared by dissolving 20.2 {\rm mL} of methanol ({\rm{CH}}_3 {\rm{OH}}) in 100.0 {\rm mL} of water at 25 ^\circ {\rm C}. The final volume of the solution is 118 {\rm mL}. The densities of methanol and water at this temperature are 0.782 {\rm g/mL} and 1.00 {\rm ...
July 14, 2012

hh
When the baseball is shot straight upward with an initial speed of 20 \rm m/s, what is the maximum height above its initial location?
July 14, 2012

physic
In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 26m/s at an angle of 35^\circ above the horizontal.How high is the ball when it hits the wall?
July 14, 2012

physic
A dolphin jumps with an initial velocity of 13.0m/s at an angle of 41.0 ^\circ above the horizontal. The dolphin passes through the center of a hoop before returning to the water.If the dolphin is moving horizontally when it goes through the hoop, how high above the water is ...
July 14, 2012

chm
At a certain temperature the concentration of was 0.400 and that of was 0.235 . At equilibrium the concentration of was found to be 0.250 . What is the value of at this temperature?
February 9, 2012

physics
which will reach the bottom first, a hallow cylider or a solid cylider wth the same mass in an inclined plane?
February 9, 2012

math
what is the largest are of rectangular area that can be enclosed in sixteen meter fence ?
September 19, 2011

physicssssss
A blue ball is thrown upward with an initial speed of 20.6 m/s, from a height of 0.8 meters above the ground. 2.5 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 8.2 m/s from a height of 23.7 meters above the ground. The force of ...
September 15, 2011

business
Construction of a new plant: Architect's fees $ 4,000 Cash paid for land and run-down building thereon 120,000 Removal of old building 18,000 Salvage from sale of old building parts (4,000) Survey to site the new building 800 Legal fees for title search 1,400 Excavation ...
June 30, 2010

physics
newyorks 33-m tower oscilatesnin the wind with a period of 6.80s calculate the frequency
February 21, 2010

12grade economics
suppose that your state raises its sales tax from 5 percent to 6 percent. the state revenue commissioner forecasts a 20 percent increase in sales tax revenue . is this plausible? explain.
January 5, 2010

Physics
19 m/s
December 1, 2009

chem
nicl2.6h2o + h2o+ nh3 chemical equation?
October 14, 2009

esl
is uses z or iz
September 13, 2009

physics
to find the change in percentage: (New-Old)/Old [(16^2)-(8^2)]/(8^2) = 3
October 29, 2008

math
one half gallon equals ----- quarts. i think it 2 gallons can you correct me please?
September 22, 2008

criminal justice
what is chain of evidence?
July 1, 2008

criminal justice
What are somes ways that we as a community can stop police brutality?
May 3, 2008

pre-cal/trig
Sorry, cosx+ sinx is not equal to 1 (from the identites). But, it was like this: (sinx)^2+ (cosx)^2= 1
March 4, 2008

pre-cal/trig
PlEASE hlep me with this!! I need it as soon as possible....... cos(x-(pi/4))+sin(x-(pi/4))=1 Find the answer from 0 to 2pi. When I slove this, I got cosx+sinx=(1/ square root of 2). then I don't know what to do the rest. Please help me.
March 4, 2008

English
The following sentence is in a business letter. To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet. I would replace "you" with "one". Would that be correct? Yes. That's correct.
August 6, 2007

English
The following sentence is in a business letter. To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet. Since it is a business letter, would "you" be an unclear pronoun? Yes. How would you make it more formal? I would replace you with one...
August 6, 2007

English
What, if anything, is wrong with the following sentence. To be fit, you should get enough sleep, exercise regularly, and eat a healthy diet. a. Properly constructed sentence b. Comma splice c. Lacks parallel parts d. Unclear pronoun This is a properly constructed sentence. It ...
August 6, 2007

English
What, if anything,is wrong with the following sentence? a. Properly constructed sentence. b. Comma splice c. Lacks parallel parts d. Unclear pronoun Please type the sentence. Also, indicate what you think is wrong with the sentence.
August 6, 2007

chem
What is the name of the compound with the formula N2O5? Dinitrogen pentoxide. or Nitrogen(V) oxide What is BF3 and NaH?
October 16, 2006

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