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August 30, 2014

Posts by bob


Total # Posts: 2,372

Chemistry
dispersion forces < dipole-dipole interactions < hydrogen bonds
December 2, 2008

Math - help really needed
1+tan^2x/tan^2x ^ I split that fraction, making the 1/denom. a fraction, and adding it to the tan^2/denom fraction.
December 2, 2008

Math - help really needed
You actually get (1/tan^2x)+1, which is cot^2 + (csc^2x-cot^2x), which is csc^2x, which is 1/sin^2x. And that's your answer. (You could only cancel out the tan^2 if it were (Some #)(tan^2x)/tan^2x, rather than (1)+(tan^2x)/tan^2x. Dividing is the inverse of multiplying, so...
December 2, 2008

Math - help really needed
I'll give you a hint: Try replacing the 1 with tan^2x/tan^2x. After add that to 1/tan^2x, replace the denominator (the tan^2x) with sin^2/cos^2.
December 2, 2008

Math - help really needed
PYTHAGOREAN IDENTITIES: sin^2 + cos^2 = 1 (a^2 + b^2 = c^2) sec^2 - tan^2 = 1 csc^2 = cot^2 = 1 (the co-version of the above) (1/cosx)-(cosx/1)=sinxtanx To subtract those two, you need a common denominator, so multiply the (cosx/1) by (cosx/cosx). When you subtract them, the ...
December 2, 2008

Accounting
How and why variances are used?
December 2, 2008

chemistry
c,d
November 23, 2008

7th grade
93+
November 20, 2008

English
Was it a baseball game
November 19, 2008

Physics
( And the answer's supposed to be 0.131 )
November 19, 2008

Physics
In a popular amusement-park ride, a cylinder of radius 3.00 m is set in rotation at an angular speed of 5.00 rad/s (counter-clockwise). The floor then drops away, leaving the riders suspended against the wall in a vertical position. What minimum coefficient of friction between...
November 19, 2008

Physics
I think the first sentence is extra information. Here's my work: Change in arc/change in radians = 757 / 184.9 = 4.09 meters To get the change in arc, I did: 900m - 143m = 757 m To get the change in radians, I did: 70pi radians - 35 radians = 184.9 radians Is my answer of ...
November 19, 2008

Physics
When a wheel is rotated through an angle of 35 degrees, a point on the circumference travels through an arc length of 2.5 m. When the wheel is rotated through angles of 35 rad and 35 rev, the same point travels through arc lengths of 143 m and 9.0 X 10^2 m, respectively. What ...
November 19, 2008

1st grade
The loaves of bread have ____ perfectly
November 17, 2008

Math
they have a physical fit
November 13, 2008

biology
1. Clinique makes an antiwrinkle cream that you put on the skin next to your eyes. The cream contains water-filled microcapsules that gradually burst when exposed to skin heat. The cream is approximately 85% water. Knowing that skin cells contain 70% water, explain why this ...
November 12, 2008

Math
A number multiplied by itself and then by itself again gives -1,000. What is the number?
November 12, 2008

grade 8 LA/ English
one of the words is relate
November 10, 2008

grade 8 LA/ English
please answer: what are inflected forms and run on derivitaves? the question is: For each of the words on the table, write down both as an Inflcted Form and a run on derivitave.
November 10, 2008

language arts
ahh ok thanks
November 10, 2008

language arts
thank you.. so like for the word laugh, it could vary, like laughing, laughed, etc.?
November 10, 2008

language arts
what are inflected forms and run on derivitaves?
November 10, 2008

7th grade pre algebra
i like chicken
November 6, 2008

math
idk dude
November 6, 2008

physics
A 150 N/m, 5 m spring on a 26 degree incline is compressed 2.3 m and a 5 kg block is placed on it. If we neglect friction, how far up the incline from where it starts will the block travel? How fast will it be traveling when it is 0.2 m up the incline from where it starts?
November 5, 2008

english 3 gothic elements
Support the theme "evil can infect people that seem upright."
November 4, 2008

english
14 line ten syllable poems
November 4, 2008

Math
Thanks!
November 3, 2008

Math
There were 60 students who tried out for the school play. Only 0.7 of the students were selected to be in the play. What fraction of the students were not selected to be in the play?
November 3, 2008

Math riddle PIZZAZZ Worksheet
U NEED TO ASK A TECHER
October 30, 2008

6th grade Math
Ok, thanks..
October 29, 2008

6th grade Math
*Corrected, I got .857142 - (repeat sign) for 6/7ths.
October 29, 2008

6th grade Math
Oh, okay.. So.. _ 2. I got, 692376 So, rounds to.. 0.70? _ 3. I got, 657142 So, rounds to.. 0.65?
October 29, 2008

6th grade Math
Converting Fractions; *Round to the nearest hundredth. -DECIMALS- I don't know if i'm right, I don't really know how to round it to the nearest hundredth. Help please.. 1. 4/7 2. 9/13 3. 6/7
October 29, 2008

6th grade Social Studies
Nevermind, solved.. Ethnic Group. (thanks google)
October 29, 2008

6th grade Social Studies
SORRY! I put the wrong subject, it's Social Stud.
October 29, 2008

6th grade Science
Crossword puzzle: 11 boxes; Over Chapter 16 Sections 1 & 2, I can't find it in my book.. Definition: People who share a common and distinctive culture, heritage, and language.
October 29, 2008

verbs
were suppose to find out if these are linking or action and find the verb this is what i put(also can you i dentify 4 helping verbs in the sentences 1)Mail travels overseaes on airplanes action travels 2)Mail also can go overseas by boats action go 3)Boats are slower but less ...
October 29, 2008

Geography
The national basketball association team from Seattle in now in Oklahoma City. What two NFL teams will be returning to the city from whence they came?
October 28, 2008

chem
Hey could you please help me. Why would K2CO3 be a better drying agent than Na2SO4 when drying out water from cyclohexanol?
October 28, 2008

6th grade
THANK YOU!!!
October 26, 2008

6th grade
Name a fraction that is less than 2/3 but greater than 1/2.
October 26, 2008

Math
Name a fraction that is less than 2/3 but greater than 1/2.
October 26, 2008

Math
name a fraction that is less than 2/3 and greater than 1/2
October 26, 2008

math
WAT THE FRACK IS YOUR PROBLEM YOU FRACKING GIRL YOU ARE MAD RETARDED GO BECOME A SPED KID
October 22, 2008

chemistry help please!
The candle burning breaks apart the hydrocarbons comprising the candle and forms water which it immediately evaporates.
October 22, 2008

PHYSICS
A block is on a 24 degree incline, with a rope attached to a spring at the top of the ramp which has a spring constant of 65 N/m. If the spring is stretched 1.3 m, the coefficient of friction is 0.01, and the acceleration of the block is 0.35 up the incline, what is the mass ...
October 19, 2008

6 grade math
How many whole numbers are there between 99 and 1000?
October 17, 2008

math
fjsklfjskl
October 16, 2008

please correct my essay with details please
In my family the boy booby attracts the girl’s attention by tipping his beak, tail, and wing tips to the sky while whistling. Then the couple march around each other, lifting their blue feet in a high step. Trying to impress the girls, the boy blue-footed booby offers the...
October 16, 2008

phsyical science
utjyhtegrfedwsqdfghtj
October 15, 2008

Math
Hi! im looking to find relationships between sets of polygonal numbers. I have found a few through the use of finite differences, (a relationship occurs between the formula to determine the polygonal number). I have also found that the 2nd derivative of these formula ...
October 14, 2008

English
hi
October 10, 2008

Math probability question
a spinner is divided into three areas x,y,z. the measure of angle a is 90 degrees, angle b is 120 degrees and angle c is 150 degrees. If the spinner is spun once, find the probabliity that it will land in 1) area X 2) area y 3) area z
October 8, 2008

science
which will form a ion more easily Sodium or Sulfur and why
October 8, 2008

chemistry
consider a crystallization of sulfanilamide in which 10 mL of hot 95% ethyl alcohol is added to 0.10 g of impure sulfanimide. after the solid has dissolved, the solution is cooled to room temp. and then placed into an ice-water bath. no crystals for, even after scratching with...
October 7, 2008

english
We have to do an oral commentary and analyze an poem that can be related to structuralism. We read a book called the educated imagination, and that book explains the idea of structuralism. Can somebody please suggest an poem that would be good for this assignment? and also, ...
October 7, 2008

Math Approximation to find greater fractions
this stinks
October 7, 2008

Project Management
line, comprising 17 stations and slightly more tan 10 total miles of track, had taken 23 years from the date it was first approved at a final estimated cost of almost $5 billion. To put this figure into perspective, New York City’s subway system boasts 656 miles of ...
October 5, 2008

Art for Bob & Mitchell
Thanks for doing that. I look forward to any replies.
October 4, 2008

msg for SraJMcGin
Thanks for help. I have just been on one of the sites you mentioned and typed in my question. Luckily one of the artists did belong to an art movement. Thats good enough for me. Thanks again.
October 4, 2008

Art
Help! I need to know if Sigmar Polke, Edward Hopper, Patrick Caulfied & Robert Rauschenberg all belong to an art movement. So far, I have been unable to find this information. Does anyone know where I can find it?
October 4, 2008

6th Grade Science
hi
October 4, 2008

art
i need to say what kind of marks are used to complete a picture. the picture is called the birds by dawn dupree. the picture shows birds, rakes and scaffolding. please can someone explain what 'marks' mean? thanks
October 4, 2008

pre algebra
how do you divide integers when one is a whole number and one is a decimal?
September 30, 2008

Social Studies
The Middle East country of __________ ran out of oil in the 1970's
September 30, 2008

Science-8th Grade
liter
September 29, 2008

social studies
what are some of the main products of New York State?
September 24, 2008

math
SEETSEALL
September 24, 2008

art
I am trying to find out how dawn dupree's work looks like and how it inspired her to robert rauschenberg, edward hopper, sigmar polke and patrick caulfield.
September 24, 2008

Algebra
75% of 68 is what number Express as an equation
September 24, 2008

Grade 11 maths plz help!!!
It's A.
September 23, 2008

8th grade math
3x+4=193 you dont know what x is so you cant go any farther i just got done with this unit
September 22, 2008

math Third grade
WTF?
September 22, 2008

GRADE 11 MATH
Show that the equation 2x^2 - 5x + 2 = 0 has roots that are reciprocals of each other. Under what conditions will a quadratic equation in the form ax ^2 +bx + c = 0 have roots that are reciprocals of each other?
September 21, 2008

Economics (Cournot Equilibrium)
If market demand is P = 100 - Q and MC is 40, what is the Cournot Equilibrium for N firms?
September 20, 2008

science
must be current
September 17, 2008

science
the is the starting sallery of a food scientist?
September 17, 2008

english
How do you diagram the sentence, My dad is mean, he makes me do push up, someone stop him before I die, please, please, please!
September 17, 2008

criminal justice
This is what I have s far. Most people in the19th century lived in poverty, which leads to higher rates of crime. Not to mention the utter lack of law enforcement and the laws that were enforced were generally in the form of a punitive punishment for example hanging for ...
September 11, 2008

criminal justice
Crime rates were exceedingly high in the nineteenth century before TV, movies, and rap videos had been created. What, if anything does this say about the effect of media on crime
September 11, 2008

Algebra
suppose a,b,c and d are different positive integers whose sum is 100, and a-c=5. What is the greatest possible value of ab-cd?
September 10, 2008

7th grade science
Are volcano's alive?
September 10, 2008

science
Two stones are launched from the top of a tall building. One stone is thrown in a direction 30.0degree above the horizontal with a speed of 10.0m/s ; the other is thrown in a direction 30.0degree below the horizontal with the same speed. Which stone lands farther away from the...
September 8, 2008

history
describe three ways blacks were discrimated durning the 1800"s. thank you.
September 8, 2008

social studies
how did the ideas of the enlightenment sparke the revolution in america and europe?
September 1, 2008

science
what is the definition for volume
August 26, 2008

Algebra 2
how can i found out if y=2/3X + 1/2 is a linear equation
August 24, 2008

computer education
FAIL
August 20, 2008

writing
ok there is this thing called big word and i need to make 20 words with letters cevdebei i must make the words 4 letters long can u help
August 20, 2008

math
Hi! Can anyone give me some tips on how i would determine the shape of a vessel from a graph of volume vs time? "a set volume of water is poured steadily into a vessel, the height at set volume intervals is recorded." "determine a possible vessel shape based on ...
August 14, 2008

math
-3
August 14, 2008

computer science
Final Project Overview and Timeline Final Project Overview The final project in COM 135 involves the creation of portions of a user manual for a product of your choice. This manual should contain the following elements: • The manual must be a Microsoft® Word document ...
July 22, 2008

organic chemistry
What is the major product formed on reaction of 1-pentene with bromine in aqueous solution? a. 1-Bromo-1-pentanol b. 1-Bromo-2-pentanol c. 2-Bromo-1-pentanol d. 1-Bromo-1-pentanol e. 2-Bromo-1-pentene
July 19, 2008

organic chemistry
a certain arene C8H10 is oxidized by potassium dichromate to benzoic acid, C6H5COOH. What is this arene? a. o-xylene b. m-xylene c. P-xylene d. ethylbenzene
July 19, 2008

Trigonometry
A ladder that is 6 meters long is placed against a wall. It makes an angle 0f 34 degrees with the wall. Find how high up the wall it reaches and the distnce the base of the ladder is away from the wall
July 19, 2008

Linking and Action Verbs
well there could be many answers to this situation. I will only state one. now to use a verb it is to be called a noum.. the end. And your welcome for my sweet time.
July 15, 2008

chemistry
just do what dr guy said cuz all is one to one ratio. foo
July 1, 2008

history
Should the NAACP have challenged the earlier Plessy decision instead of waiting to appeal the Brown decision? Could things have moved forward more quickly if they had?
June 28, 2008

Science
How does the density and the elasticity of a medium affect the speed of a wave? PLEASE HELP!! :)
June 10, 2008

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