Questions Asked on
January 20, 2009

Physics
Four identical masses of 800kg each are placed at the corners of a square whose side length is 10.0cm. What is the net gravitational force (magnitude and direction) on one of the masses, due to the other three? I think I have to separate the four masses
asked by Jaime 
physics
Calculate the speed at the edge of a disc of radius 8.5 cm that rotates at the rate of 4 rev/s. Answer should be in units of m/s Thanks
asked by Bob 
chemistry
Ca(s) + Br2(l) > CaBr2 is synthesis my teacher also said that the cause of the reaction is stable electron configuration is that the same thing as the electrolytes one
asked by lyne 
global
What did ancient Hebrews need to do to please their god?
asked by Anonymous 
geometry
If you had two triangles, triangle RST and triangle UVW, and in triangle RST angle R= angle S= angle T and in triangle UVW angle U= angle V= angle W, is there enough information to prove that the triangles are congruent? So each triangle is equiangular.
asked by Anonymous 
8th Grade Algebra: Answer Check
Find the length of the 3rd side of each right triangle. 1. 8^2+15^2=c^2 Answer: c=17 2. 5^2+b^2=13^2 Answer: b=12 3. 9^2+13^2=c^2 Answer: c~15.81 Simplify. Assume that all variables are nonnegative. { this means square root 4. {12 Answer: 2{3 5. 2{75
asked by Joy 
physics
A 72 g baseball rolls off a 1.5 m high table and strikes the floor a distance of .8 m away from table. How fast is it rolling on the table before it fell off?? Accel of gravity is 9.81 m/s2.
asked by Bob 
trig
(cotxsec2x  cotx)/ (sinxtanx + cosx) = sinx prove. i keep getting (if i start from the left side) = cosx instead of sinx please help!
asked by Spencer 
spelling
take 5 words and make a sentence out of it lets, school, out, at, for, four, let's Thanks
asked by Anonymous 
9th grade
How do you calculate the thermal amplitude
asked by Mat 
Chemistry
A 12.7 L sample of gas is under a pressure of 740 mm Hg at 20degrees C. What will be the volume of the gas if the pressure increases to 1.00 atm and the temperature drops to 0 degrees C
asked by Mary 
physics
A wheel of diameter 0.700 meters rolls without slipping. A point on the top of the wheel moves with a tangential speed of 2.00 m/s with respect to the ground. 1. If the wheel suddenly stops spinning and skis along the ground then a. v=rù b. v>rù c. v
asked by bob 
chem
quantitative determination of acetylsalicylic acid in aspirin tablets by back titration 1)why do we use a more dilute NaOH solution for the standardization of NaOH? 2)what is the rationale behind the dilution and aliquoting of the aspirin sample? 3)what
asked by krissy 
2nd grade math requestion post
Okay, my child is doing problem solving lesson 57 in scott foresman addison wesley book. The question that we are having a problem with is a number line. there are 10 spaces in the number line and the clues are: Clue 1: the number are between 70 and 82
asked by Dawn 
8th Grade Algebra: Answer Check #2
Add or Subtract (Radicals) { this means squared 1.3{2 + 4{2 Answer: 7{2 2. 8{3 + 3{3 Answer: 11{3 3. 7{5  3{5 Answer: 4{5 4. 8{2  5{2 Answer: 3{2 5. 6{x + 7{x Answer: 13{x 6. 9{y + 3{y Answer: 12{y Multiply 7. 3x^2(4x^23x5) Answer: 12x^2 8.(3b+5)(b3)
asked by Joy 
social studies
how does the presence of top carnivores indicate that an ecosystem is healthy
asked by diego 
science
Explain what would happen to the animals and plants in a saltwater ecosystem if it were flooded by fresh water?
asked by Deja 
Precalculus
Find the interquartile range and the semiinterquartile range of the following data: 42 51 53 53 59 61 75 100 mean=61.75=62 median=56 mode=53 interquartile range=87.552=35.5?
asked by Mary 
Math
Prove the identity. sin² θ = tan² θ / 1 + tan² θ
asked by Jillian 
writing sentences and paragraphs
you've applied for a specific job in your field of study .The human resources department arranges an interview and tells you to bring a polished piece of writing for them to evaluate your writing skills
asked by tara 
Precalculus
Find the first three iterates of the function f(x)=x^22, if the intial value is 2. z(0)=2 z(1)=(2)^22 or 42=2 z(2)=(2)^22 or 42=2 z(3)=(2)^22 or 42=2 Answer: z(1)=2, z(2)=2, z(3)=2
asked by Liz 
Chemistry
Explain why the alcohol level in a thermometer rises when it is placed in a warmer fluid (#step process)
asked by Mary 
Accounting
Classify the following Users of information as either: Internal User External User; trading partner External User; Stake holder 1) IRS 2) Inventory control manager 3) Board of Directors 4)Customers 5) Lending Institutions 6)SEC 7) Stockholders 8) CEO 9)
asked by Peter 
Business
Assume the role of a small business owner. You have little funds to put into insurance and protection for your company. You have to decide where your extra funds will be stretched. Is it more important for you as a business owner to protect your business
asked by Will 
Journalism
Ok, I am writing two articles for my journalism class. We write the newspaper. So my first article is about what type of dog Obama is going to get for the white house and his kids. I talk about the two breeds of dogs they are choosing and a little about
asked by Amy 
calculus
x^2 + y^2 = 25 3x + y = 15 Find the two points of intersection. I don't just want the answer, if you could tell me how to find it, it would save my life. The sqaure root is making it really hard for me to understand.
asked by Nicole 
Human Geography (Religion)
So I have to do a project on the Cultural Interaction in Religion. My religion is Sikhism. Here are the questions I'm supposed to answer in my presentation: How does the religion impact other aspects of culture? How does this religious faith influence the
asked by Maddie 
chemistry
Given the following reaction: 4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 How many moles of O2 will be produced if 2.46 moles of CO2 react completely? moles
asked by bob 
precalc
a 21speed bike has varying top speeds dependent on the gear it's in. the bike's tire diameter is 26 inches. the bike can pedal at a maximum of 130 revolutions per minute. the front chain wheel has sprokets of 24, 32, and 40 teeth. the rear cassette
asked by syd 
Chemisty
The relative electric charge of a proton is +1, the relative electric charge of an electron is 1 and that of neutron is 0. What is electric charge and why is it relative? Thank a lot.
asked by janice 
college Accounting
Classify the following Users of information as either: Internal User External User; trading partner External User; Stake holder 1) IRS 2) Inventory control manager 3) Board of Directors 4)Customers 5) Lending Institutions 6)SEC 7) Stockholders 8) CEO 9)
asked by Peter 
college
1. Solve. 2x+3y+4z=2 5x2y+3z=0 x5y2z=4 A. (3, 4, 2) B. (2 ,1, 2) C. (2, 2, 2) D. (1, 1, 2)
asked by Sharnell 
science
what would happen tp animals and plants in a saltwater ecosystem if it were flooded by fresh water?
asked by Deja 
physics
person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the
asked by bob 
Precalculus
Find the quotient 3[cos5pi/12+isin5pi/12] divided by 6[cospi/12+isinpi/12]. Express the quotient in rectangular form. I worked it out as: 1/2[cospi/3+isinpi/3] =1/2(1/2+1/2i) =1/2+1/2i Is this right?
asked by Mary 
math
Customers of a phone company can choose between two service plans for long distance calls. The first plan has an $18 onetime activation fee and charges 10 cents a minute. The second plan has no activation fee and charges 15 cents a minute. After how many
asked by Geno 
5th grade
on the periodic table what has 4 neutrons and is a metallic
asked by sam 
chemistry
NaCl + CuSO4 to write the product would i just do double replacement to get Na2SO4 + CuCl2 so the whole thing would be 2NaCl + CuSO4 > Na2SO4 + CuCl2
asked by lyne 
Chemistry Lab
We did a lab where we reacted antacid with HCL and measured the pressure increase after the reaction. Then we found the percent concentrations of calcium carbonate of the antacid tablet. The question is: say the percent of calcium carbonate from trials 1 &
asked by Shaniquaa 
English
What is the possesive form of the word seashells
asked by Glenda 
AED / ASAP PLEASE
this is my DQ 1: What are some factors that contribute to the disproportional representation of minority students in special education classes? Explain your answer. here is the scenerio and the question # 1 I need to answer:Riley Behler, a thirdgrade
asked by troyer0269 
english
Hi, can someone please revise my essay. I'd really appriciate any sugestions. There has been an ongoing controversy in Canada on whether the drinking age should be lowered to eighteen like most of the world (Russia, Argentina, Hong Kong, etc.) or if it
asked by Maria 
English
So I'm working on an english paper but I've been stuck the past hour on what to do. I'm trying to take my teachers advice by putting in an anaphorism (repeated words or phrases)but I'm having trouble. I'm repeating the phrase "eight months" but I'm stuck
asked by Lauren 
physics
a person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the
asked by bob 
3rd grade
alice folded a piece of paper into 12 equal squares and colored them. She had 3 times as many red parts as green parts and 2 more yellow parts than blue parts. How many parts did she have of eeach color?
asked by tee 
Precalc, Algebra, Trig
(2x squared3x +1)(4)(3x+2)cubed (3)+(3x +2)raised to the 4 (4x3) Simplify
asked by Josiah 
Chemistery
An aqueous solution of calcium chloride contains 2 g of calcium chloride (molar mass 110.98 g mol1) in 100 ml. Calculate the concentration of chloride ion in the solution any help their
asked by Slaysliver 
math
John is making a bookcase that is 72 3/8inches tall, he wants 5 equally spaced shelves. Eacg self is 3/8 inche thick. tell him where to drill the holes.
asked by Lou 
geometry
Mr. Rose wants to install walltowall carpeting in his living room. The carpeting will cost $15.50 per square yard, the padding will cost $3.50 per square yard, and the installation is $2.50 per square yard. What will it cost him to carpet the living room
asked by los 
science
I need a really cool unusual idea for my 5th grade science fair project  any ideas would be appreciated. Thank you,
asked by sydney 
U.S. History
Explain how the issues of "Gold, Glory and God" influenced not only the colonizing activities of Spain and England but also the economic gain and glory for all individuals involved.
asked by y912f 
math
a glass of ice tea cost two dollars. Refills cost 25 cents each. write the rule in function notation. is it F(x)=2+.25x? If it is wrong can you help
asked by malik 
english
would the verb in this sentence be transitional or intransitional. if transitional, what would be the object? She threw a wonderful celebration.
asked by alli 
Algebra
What is the length of the interval of solutions to the inequality 1 ( is less than or equal to) 34x (is less than or equal to) 9? I presume that I just plug in numbers for x? The problem is, that all the positive numbers I've tried have made them way less
asked by Elle 
algebra
Can anyone answer these? 3/12 + 3/4x 4/(x + 3) * 3x/8 4x/15 Ã· 12x/3 13/(4x) * 16/39 (3/2)x + (5/2) 9/(4xa)  3/4
asked by Shanna 
global history
what role did the king play in religion in ancient Isreal?
asked by Anonymous 
Chemistryplease help
The relative mass of a proton is 1 and the relative mass of a neutron is 1. 1)Why do we use the term "relative mass" instead of mass? Is it because the mass of a proton is compared to the mass of a carbon12 atom? 2) Can we say that the relative mass of an
asked by janice 
math
How to solve this quadratic equation by factoring? 10x2  19x 15 = 0
asked by JoAnn 
Math
Solve 4sin^2x + 4(squareroot of 2)cosx 6 for all real values of x.
asked by Joanie 
Point Slope Form Algebra
What is the difference between Y1=MX1+B and Y=MX+B
asked by Rachel 
social help
How does major religion affect culture?
asked by Anonymous 
Math
I have two problemson polygonal convex sets which I do not understand. The first: Find the minimum value of f(x,y) = 2xy+2 for the polygonal convex set determined by this system of inequalities: x is more than or equal to 1 x is less than or equal to 3 y
asked by Joanie 
Chemistry Lab
We did a lab where we reacted antacid with HCL and measured the pressure increase after the reaction. Then we found the percent concentrations of calcium carbonate of the antacid tablet. The question is: say the percent of calcium carbonate from trials 1 &
asked by Shaniquaa 
precalc
a 21speed bike has varying top speeds dependent on the gear it's in. the bike's tire diameter is 26 inches. the bike can pedal at a maximum of 130 revolutions per minute. the front chain wheel has sprokets of 24, 32, and 40 teeth. the rear cassette
asked by syd 
EnglishJane Eyre
This is a book review that I have wrote for Jane Eyre by Charlotte Bronte. Could you please check if I have any obvious mistakes and give me a comment for this? Or a grade out of 20? 1. Title: Jane Eyre 2. Author: Charlotte Bronte 3. Genre: Romance,
asked by Abigail 
College math
A planehas 7 hrs. to reach a target and come back to base. it flies out to the target at 480 miles per hr. and returns on the same route at 640 miles per hour. how many miles from the base is the target?
asked by Kim 
math 116
can you help me explain this one? 9 + 6 x (8  5)
asked by meshelle 
English
In these two sentences, I'm not sure where to put the apostrophe to make it a plural possessive noun. We were excited to see the (children) photographs. The pictures looked like real (photographer) pictures.
asked by Sylvie 
English
Edgar Allan Poe Biography Please Check!! (teacher limited to be 3 paragraphs only. Please check my sentence fluency, grammar, and point out any unimportant points of his life.) Edgar Allan Poe was born in Massachusetts, Boston, on January 19, 1809. His
asked by Jennifer 
science
how does the life cycle of hatena compare to the origin of eukaryotic cells as noted in Margulis’ Endosymbiotic Theory? something about how one life form engulfs another and incorporates it, evolving until it becomes dependent on it and has created an
asked by erin 
Chem
i don't get this ?.......If the weather forecast stated that the pressure is 104.2kpa. then what is the pressure in the atmosphere? and what would a barometer measure in mm of mercury need help please
asked by Z 
Business
Would it be easier to defend a case regarding real property or intellectual property?
asked by Will 
science please!
Estimate the value of the cell potential for the following rxn: Mn02(s) + 4H30+(pH=3.8) + 2Ag(s) > Mn2+(aq, .1M) + 6H20(l) I got Ecell=.48V delta G circle= 92640 J/mol and delta g = 107484 is this correct?
asked by erin 
2nd grade
Okay, my child is doing problem solving lesson 57 in scott foresman addison wesley book. The question that we are having a problem with is a number line. there are 10 spaces in the number line and the clues are: Clue 1: the number are between 70 and 82
asked by Dawn 
3rd grade math
It say set 12: subtracting 2; differences of 2. A triangle has a 3 on top and a 2 on the left bottom?
asked by mia 
physics
a person stands a distance of 0.300 meters from the right end of a 2.00 meter long uniform platform that is supported by two posts, one at each end. The board has a mass of 20.0 kg and the person's mass is 75.0 kg. a. determine the force exterted on the
asked by bob 
math
identify the independant and dependant variables. A photo lab charges 15 cents per print.
asked by malik 
english
I need help rewriting this sentence. There has been an ongoing controversy in Canada on whether the drinking age should be lowered to eighteen like most of the world (Russia, Argentina, Hong Kong, etc.) or if it should stay at nineteen. using this
asked by Maria 
college
How others view a person can influence how that person views his or her environment and those in his or her environment
asked by Anonymous 
Social Studies
What is George's Bush policy on science?
asked by Peter 
math
how far is it from California to colodrado?
asked by leah 
y912f
Consumers can encourage manufacturers to keep their operations in the United States by buying only Americanmade products. Do you want to buy only products made in the United States(NO). Write a five paragraph essay defending your position. i just need
asked by y912f 
Julius Caesar
In Act II scene iv of Shakespeare's Julius Caesar, what is wrong with Portia?
asked by Anonymous 
BEH 225
What areas of psychology gained a positive outcome from the discovery or use of some of the psychological medications used and why?
asked by Deb 
math
x = 3  y^2 y = x  3 Find the points of intersection. If someone could even get me to the point where it gets written in general form (both equations set to 0..) I would be forever grateful.
asked by strawerryfields 
law and ethics
Compare and contrast contributory negligence with comparative negligence
asked by Anonymous 
3rd grade mathhelp
It say set 12: subtracting 2; differences of 2. A triangle has a 3 on top and a 2 on the left bottom?
asked by mia 
U.S. History
please check these,my answers are in CAPS 1.Europeans fought the Crusades a. to establish new trade routes to the Indies b. to put limitations on European trade C. TO TAKE CONTROL OF JERUSALEM FROM MUSLIM TURKS d. to convert Muslims to Christianity
asked by y912f 
global
how did the ancient Hebrews maintain their religion as they traveled from place to place?
asked by Anonymous 
college
all records in a file must be uniquely identiied in at least one attribute which is its primary key. identify primary key Record Type: Accounts payable Inventory Customer Sales Orders Purchase Orders to Vendors Cash Receipts (checks) from Customers Cash
asked by Accounting 
accounting
how do i calulate my ss witholdings from my paycheck? i know its 6.2% of my earnings. So if i made 551.65 for the year i would take 551.65*6.2% and subtract that answer from the 551.65?
asked by ask 
computers
I have this problem with my PC The sound won't function properly. I've checked the volume controls and audio properties, etc, but they seem to be working fine. It's just that the sound won't come out. I've also tried installing a new set of speakers, yet
asked by Mark 
science
IS IT RIGHT TO MAKE CHANGES TO THE QUALITIIES OF HUMANS!
asked by lol 
chemistry
i did a lab and found that of the products two gases were formed H2 and H2CO3 the question is... What are the tests that will verify the identity of these gases? what is this asking?
asked by lyne 
spanish
which of these is right? wouldn't they both be? 1. no se aburría nadie. 2. no me aburría nadie. thanks so much :)
asked by chrissi 
Another algebra
Determine the number of positive integers n that satisfy: 1/2 < n/n+1 < 99/101 I don't know how to solve this besides plugging in random numbers, which would take all day. Any other suggestions for a faster way to solve it? Thank you!
asked by Elle 
math
How can you tell if a number is a multiple of 6?
asked by ryan 
math
the pass code to mrs.kyles alarm system is 6 digits.each can be from 0  6 and can only be used once.how many different combinations can mrs.kyle come up with?
asked by lisa 
MATH116
I'm not to sure about this but would it be written in this form: 2x + 4=6? Let me know if this is correct or not, I'm terrible with Algebra.
asked by meshelle 
social studies
which religion began in the middle east shintoism, hinduism, judaism or buddhism
asked by gunji 
marketing
Consider a recent purchase that you or a family member has made (examples: a household product, a DVD or CD, a grocery item, an electronic device, etc.) Describe the item and list three main reasons you purchased that product as opposed to another product.
asked by jay jay 
english
the term freewriting refers to?
asked by san 
MathAlgebra
[SQRT(x + 3)]  [SQRT(x  2)] =1 Can someone help me solve this equation.
asked by Mike 
earth science
what do two of the stars in the bowl of the big dipper point to ?
asked by Eddie 
math
y= a*tan pi/p (xc)+d what letters represent the following domain: range: asymtotes: period: p phase shift: c vertical: d I can't figure out the rest
asked by Sh 
Fractions
__ Change 1.01 to a fraction Book says answer is 100/99. not clear why?
asked by G 
ecology
what is a stamen
asked by momo 
EnglishRepost
Hello! English is my second language, and at the moment, unfortunately, I don't have anybody who can read my paper since both my parents are not fluent in English. And I'm probably living on the other side of the earth, since it is now ten thirty pm.
asked by Jennifer 
math
ã49 + ã343  ã2401 = please help me solve
asked by Julissa 
math fraction word problem
Betty needs to stack boxes 13 3/4 inches tall. The ceiling is 16 feet. How many can she stack?
asked by Melissa 
math help
Solve for t: 4 6  =  t+3 12t
asked by Anonymous 
Social Studies
What is a right action; good quality? We are learning about India, and I'm not sure what it is asking here.
asked by Joe 
social
how beliek system spread over large areas?
asked by Anonymous 
English
What is an analogy?
asked by Lori 
history
who was the 3 priesident of th u.s
asked by mario 
math help needed
Solve for t: 4 6  =  t+3 12t
asked by Anonymous 
social studies
what is a symbol used in writing?
asked by abby