Questions Asked on
October 8, 2007

chemistry
what is the formula for cobalt (III) chloride and sodium hydroxide
asked by Nannette 
Chemistry
If 1.000 kcal of heat is added to 1.700 L of oxygen in a cylinder at constant pressure of 1.00 atm, the volume increases to 2.100 L. Calculate the total energy change for this process.
asked by Raj 
Physics
A Stubborn, 120 kg mule sits down and refuses to move. To drag the mule to the barn, the exasperated farmer ties a rope around the pulls with his maximum force of 800N. The coefficients of friction between the mule and the ground are Us=0.8 and Uk=0.5. Is
asked by Anonymous 
VariationCheck Problems
Can you please check my answers? Thanxs! Write an equation that expresses the relationship. Use k as the constant of variation. 20. f varies jointly as b and the square of c. I got: f=kbc^2 22. r varies jointly as the square of s and the square of t. I
asked by Soly 
Physics
A uniform steel beam of length 5.50 m has a weight of 4.50 103 N. One end of the beam is bolted to a vertical wall. The beam is held in a horizontal position by a cable attached between the other end of the beam and a point on the wall. The cable makes an
asked by Student 
math
i don't really know how to go about anwsering this problem: the weight of the eggs produced by a certain breed of hen is Normally distributed with mean 65 grams and standard deviation 5 grams. think of cartons of such eggs as SRSs of size 12 from the
asked by Devon 
PreAlgebra
If negative 20 equals 168, negative 15 equals 153, negative 10 equals 138, negative 5 equals 123, 0 equals 108, 5 equals 93, 10 equals 78, 15 equals 63, 20 equals 48, then what is the rule??? Also, what is the pattern in the informatio above???
asked by Ellen 
Physics
A 31.8 kg child swings on a rope with a length of 6.12 m that is hanging from a tree. At the bottom of the swing, the child is moving at a speed of 4.2 m/s. What is the tension in the rope?
asked by Dante 
Variation
I have few questions that I need checked please and could you help me with the last question? Write an equation that expreses the relationship. Use k as the constant of varaiation. 1. s varies directly as h I got: s=kh 2.a varies directly as the square of
asked by Soly 
Language Arts
I don't know why authors use figurative language. Can you please help? Thank you! :)
asked by Sonic 
science(chem)
I was told before that it takes 2 mol of fluorene to be reduced by 1mol of sodium borohydride.... How many mg of fluorenone can 0.53 mol of sodium borohydride(NaBH4) reduce? what I got... 0.53mol NaBH4 ( 2mol fluorenone/ 1mol NaBH4)(180.192g/1mol
asked by ~christina~ 
Physics
A uniform steel beam of length 5.50 m has a weight of 4.50 103 N. One end of the beam is bolted to a vertical wall. The beam is held in a horizontal position by a cable attached between the other end of the beam and a point on the wall. The cable makes an
asked by Bourne 
Chem
Question: "Calculate the theoretical yield of calcium carbonate of you react 2.55g of calcium chloride dihydrate with an excess amount of sodium carbonate." I got the molar mass of calcium chloride dihydrate which is 131.015 g/mol, but Im not sure how to
asked by Jenna 
Chemistry
Suppose a piece of lead with a mass of 14.9g at a temperature of 92.5 degrees C is dropped into an insulated container of water. The mass of water is 165g and its temperature before adding the lead is 20.0 degrees C. What is the final temperature of the
asked by Lucy 
Physics
At the instant a traffic light turns green, a car starts moving with a constant acceleration a of 3.05 m/s^2. At the same time a truck, traveling with a constant speed of 10.15 m/s, overtakes and passes the car. How far beyond the traffic light will the
asked by Lindsay 
Physics
A uniform plank of length 5.1 m and weight 235 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 458 N walk on the overhanging part of the plank before
asked by Student 
Chemistry
AtomParticle that cannont be divided in half becasue it is in its smallest form. ReactantsSubstances that exist before the reaction begins. Endothermic Reactiontake in, or absorb heat energy. Exothermic Reaction Release Heat energy Inhibitormakes a
asked by Tom 
English
Hi there. I'm from Poland and I'm studying English. I need some help with a True/False exercise. There's a piece of text and there's a question below it and you need to answer it with true or false. My query is especially aimed at English Teacher's and
asked by Kate 
chemistry
No precipitate formed when an aqueous solution of NaCl or Na2SO4 was added to the sample solution. A precipitate formed when the sample solution was made basic with NaOH. Which ion(s) are present in the sample soluiton? [Hg2]2+ [Ba]2+ [Mn]2+ I know that
asked by Christie 
PreAlgebra
If negative 20 equals 168, negative 15 equals 153, negative 10 equals 138, negative 5 equals 123, 0 equals 108, 5 equals 93, 10 equals 78, 15 equals 63, 20 equals 48, then what is the rule??? Tables: X: 20 15 10 5 0 5 10 15 20 Y: 168 153 138 123 108 93
asked by Ellen 
Precalculus
The light pattern from a fog light at the airport can be modeled by the equation x^2/4  y^2/16=1. One of the points on the graph is at (3, 4.5) and one of the xintercepts is 2. Find the coordinates of the three addditional points on the graph and the
asked by Alicia 
Calculus
55. Find an equation of the tangent line to the graph of f(x) =x^3  2x + 1 a) at (2,5); b) at (1,2); c) at (0,1). I believe the answers are: a) y= (3/2 x)  (3/2) b) No solution c) No solution For each function, find the points on the graph at which the
asked by Robert 
science research
for my science project i have a research project report due tomorrow. can somebody please help me find atleast three reseach web links that can help with what i am searching about, how does color effect taste preferences or does color effect taste
asked by shivangi 
Chemistry
Kim and Al need to determine the actual mass of lead(II) sulfate in grams that formed when 1250.0mL of 0.0500 M lead(II) nitrate was mixed with 0.2000 kL of 0.0250 M sodium sulfate. When the experiment was completed Kim determined that they had a 67.5%
asked by Fred 
PreCalc
Could somebody please check this for me? Dtermine whether the graph of each equation is symmetric with respect to the origin, the xaxis, the yaxis, and the line y=x or the line y=x. I came up with the line being symmetric to the xaxis, the yaxis, and
asked by Natalie 
Math
Could someone please help me out with the data homework? All I need is someone to check my answers. If any are incorrect could you please explain what I did wrong. 1. A student must answer 7 of 10 questions on an exam. How many different sets of questions
asked by Ashley 
Math
A rectangle has a width if 10 inches and an area of 5 square inches. What is the length of the rectangle?
asked by Jacob 
PreAP English Grade 10
Ok. I am having major problems with the homework questions about King Arthur. Does anyone want to help me?
asked by Michele 
science(chem)
For the reaction: acetic acid (2g) + Isopentyl alcohol (0.9g) => Isopently acetate(1.15g)+ H2O I'm suposed to determine the limiting reagent, theoretical yield and percent yield from this reaction but the reaction was given as a picture... I'm not sure
asked by ~christina~ 
Physics
Can you tell me if there is a formula to find out the wind pressure on the sides of a roof in different areas of the roof with different pitches. Thanks Nick
asked by nick 
chem
which of these substances dissolve in water? and are they elements or compounds? copper nitrate sodium hydroxide copper hydroxide copper oxide hydrochloric acid aluminum copper chloride hydrochloric acid
asked by Sar 
Physics
1.A race car has a mass of 707 kg. It starts from rest and travels 42.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it? Do I use F=ma so then m=707 and a=42/3 which is 14. So m=707 and a=14 and I
asked by Lee Kite 
math
find the measure of each angle of a triangle whose exterior angles, one at each each vertex, have the measure 2x+10, x+20, and x+30
asked by anonymous 
Math
in triangles PQR, m
asked by anonymous 
biology
what are the five basic things to survive? I have water, food, shelter, and air but I am stumped on the last one please help!!!!
asked by Nora 
Algebra 1
I don't understand this question AT ALL. The length of a rectangle is 5 meters greater than the width. The perimeter is 150 meters. Find the length and width of the rectangle.
asked by Sonic 
Chemistry
5.000g / 2.5mL = ?
asked by Lucy 
Managerial Economics
The following relations describe the supply and demand for posters. Qd = 65,000 – 10,000 P Qs = 35,000 + 15,000P Where Q is the quantity and P is the price of a poster, in dollars. a. Complete the following table. Price Qs Qd Surplus or Shortage $6.00
asked by Eric 
geography
What is a circulating current of warmer material
asked by hhhhheellpppppppppp 
PHYSICS
A big clock has a minute hand 3 ft long and a second hand 4 ft long. let x be the distance between their tips. find max value of (dx)/(dt) *d means derivative
asked by jess 
physics
Which truck has more momentum?? 20kg*m/s or 20000kg*m/s??? HELPPP!!!
asked by lexi 
PreAlgebra
Ragweed pollen has a diameter of about 2.3x10(exponent 5)meters. Under a microscope the pollen appears to have a diameter of 2.3x10(exponent 2) meters. how many TIMES larger is the magnified image under the microscope?
asked by Alicia 
Math
Please HELP Me!! A googol is a number written with a 1 followed by 100 zeros. Write a googol in scientific notation. I don't understand this. Thank You.
asked by Happy face!! 
VariationQuestions
I have some questions that I don't understand and need to be checked please? Slove the problem. 1. y varies directly as z and y=187 when z=17. Find y when z=15 This is how I did it: 187=k*17, I divided by 17 on both sides and got k=11, then I plugged it
asked by Soly 
english/science
What actually caused the Titanic to sink?
asked by hellppppp 
math
if 1.5 teens eats 1.5 pizzas in 1.5 hours, how many pizzas can 9 teens eat in 6 hours? How do I do this problem, not just the answer. Thanks
asked by Anonymous 
Literature(Legend of King Arthur)
Discuss whether the legend of King Arthur has (or has not) made an impact on popular culture.
asked by Christian 
Chemistry
A sample of solid monoprotic acid with molar mass equal to 137.9 g/mol was titrated with 0.1879 M sodium hydroxide solution. Calculate the mass in grams of acid to be used if the volume of NaOH to be used is 25 mL.
asked by Raj 
english
why do you capitalize the seasons in some sentences but in others you dont?
asked by amanda 
Math
I have a silly question: Is there anything smaller then a mm? i can't remeber
asked by Dawn 
science(chem)
Consider the following errors that could be made when running the TLC. Indicate what should be done to correct the error. a) A 2 component mixture containing 1octene and 1,4 dimethylbenzene gave only 1 spot with and Rf value of 0.95. The solvent used was
asked by ~christina~ 
physics
A big clock has a minute hand 3 ft long and a second hand 4 ft long. let x be the distance between their tips. find max value of (dx)/(dt)
asked by jess 
Math
Joel has $20. he needs a calculator that costs $12 and some notebooks that cost $2 each. Write an inequality that can be used to find the number of notebooks, n, that Joel can afford to buy.
asked by Jasmine 
Math
Ragweed pollen has a diameter of about 2.3x10(exponent 5)meters. Under a microscope the pollen appears to have a diameter of 2.3x10(exponent 2) meters. how many TIMES larger is the magnified image under the microscope? I don't get it! What do u have to
asked by Alicia 
social studies (history)
When was the american constitution written?
asked by Shivangi 
Social Studies
In what presentday states do the Cheyenne live?
asked by Laurie 
math
solve each formula in terms of the givin variable 5d2g=9;g
asked by Anastasia 
physics
what happens to the acceleration (of a ball going around in a circle tethered to a string) if: 1) radis of the circle halves and the period of rotation stays the same 2) the peiod of rotation halves and the radius stays the same 3) the period doubles and
asked by frustrated 
Chemistry
What the difference between an orbit in the Bohr model and an orbital in the quantum mechanical model of the atom?
asked by Matthew 
Chemistry
What are the 3 rule the govern the filling of atomic orbitals by electrons?
asked by Matthew 
Math
Each year (365 days) the fire department receives 270 emergency calls on average. In a give 7day week, what is the probability of receiving A. no calls b. more than one call c. one call or less d. at least two calls please help and show me some work or
asked by Curious Student 
Math
This year, the advertising budget of the park committee is 12% more than it was last year. If the advertising budget is $300 more this year, how many dollars was the budget last year? PLEASE HELP I DO NOT KNOW WHAT TO DO!!!
asked by Samantha 
Chem  DrBob222 & drwls
Just want to say thanks to you guys for the help you gave me during the last couple of months. It was all in preparation for the National Chemistry Test and I just received word I have been selected to be in the running for the National Chem Team. Thanks
asked by Vic 
english/science
How far down is the Titanic? How far apart are the 2 large pieces of wreckage?
asked by hellppppp 
social study
Why were George Washington's troops jubilant on March 17, 1776?
asked by nana 
math
Find a formula for the following functions: x 2 1 0 1 2 3 4 y 0 3 4 3 0 5 12 x 4 3 2 1 0 1 2 3 4 y 25 16 9 4 1 0 1 4 9
asked by Ali 
chemistry
With the hydro carbon azulene it has a very large dipole moment and is an intense midnight blue color. Why is it such a deep blue and have a large dipole?
asked by melissa 
same as before
the question is How did Geoffrey of Monmouth's and Chretien de Troyes works contribute to the legend of King Arthur? How did their stories help develop the ideals of Chivalry? Explain. ah! HELP!
asked by Michele 
science
how is melting point connected to science? how is melting point connected to math? how is melting point connected to the world? how is melting point connected to you? why is melting point important?
asked by anonymous 
Mental math
In a certain company 30% of the men and 40% of women attended the annual company picnic,If 25% of all the employees are men,what % of all the employee went to the picnic?
asked by Rosy 
215 written communication
Since I started taking college classes
asked by Marilyn Green 
math
what fraction of the numbers from 1 to 1000 have the digit 7 as the least one of the digits
asked by Anonymous 
math
make a magnitude estimate.269x42= 10,100,1,000,10,000
asked by malik 
Exam skills
Hello I'm a grade 10 student . I'm an A* student and have excellent knowledge. I raise my hand in class and teachers love the way i act maturally and how i get all questions right each time The problem with me is I get everything right in class but when it
asked by AMY 
English grammar
1. You should memorize subject names. 2. He taught us in the first perion. 3. We can find the articles at the CNN website. Are the English sentences are all grammatical? If there are any mistakes, would you correct them?
asked by John 
written communcation
She drove the car right in the garage
asked by Marilyn Green 
Physics
A big clock has a minute hand 3 ft long and a second hand 4 ft long. let x be the distance between their tips. find max value of (dx)/(dt) *d for derivative
asked by jamie 
English
Use of a OR an. It is ccorrect to say/or write "a Royal Yachting Association course..." But if we choose to abbreviate to RYA is it correct to use: "a RYA ...." OR "an RYA ...." Thanks Mike
asked by Mike 
CHEMISTRY
What experimental observations can support the theory that there is restricted rotation about double bonds?
asked by Del 
English Grammar
1. The size and the length are decided by school rules. 2. The part on which the stick is used is decided by school rules as well. 3. How do you discipline problemed students?  Are the expressions grammatical? If not,
asked by John 
Social Studies
How do I find information on the internet about things like what is the sole right to trade in an area. Im doing a crossword and ive already looked in the book. Some other questions are A colony leader. Colonists sent to the americas by judges. What king
asked by Emily 
Science Repost for Tina
english/science  Tina, Monday, October 8, 2007 at 9:30pm Who discovered the digestive system?
asked by Ms. Sue 
Science  bio.
Why does the nucleus of a plant cell in the side of the cell ?
asked by Mandch 
Math
How are 2 hours and the distance traveled in 2 hours represented on the table? On the graph?
asked by Courtney 
math
If you put all 720 permutations of the digits 1 through 6 in numerical order from least to greatest (ex. 123456, 123465 etc.) What would the 409 permutation be? How do I do it?
asked by anonymous 
Algebra
Ok a few questions I want to check answers on  x+49x+3¡Ý 7(x2) 10x+7¡Ý7x14 10x7x¡Ý7x7x14 17x¡Ý21 17x/17¡Ý21/17 x¡Ý21/17 or x¡Ü21/17 ?? One I do not understand at all  The linear equation y=3x5 graphs as a
asked by John 
biology
if you put a small drop of dye in a jar of water would the diffusion be faster or slower than if a larger drop was put in
asked by pheobe 
Science
What is better to build a boat that has to be 7inches max. wide and 7 inches max. long and has to hold at least 10 large marbles out of... Wood or Styrofoam???
asked by Samantha 
Math
Can you please help me figure out how i go about figuring the following problem? .... A farmer has both pigs and chickens. There are 78 feet and 27 heads. How many pigs and how many chickens are there? ..... I am not sure what to do to figure it out.
asked by Dylan 
Math
what is the solution set of : x^2 + 9 = 0
asked by Amy 
math
if you were to put 128 mm into cm, it would be 12.8 right?
asked by Dawn 
Spanish
How do you say "to stand"?
asked by Michele 
Religion
What do catholics do to live up to their name as "catholic"?
asked by Amber 
math!
there are 100 cm in a meter...right?
asked by Dawn 
Science
What is the difference of Kinetic and Potential Energy???
asked by Soraya 
chemistry
Hi can you help me with the following question. I don't understand how to answer the question. If someone could tell me the answer for part a of the following sample problem, i would most gladly appreciate it.
asked by manny 
Physics
In a PT graph, does time always have to be on the xaxis(bottom)?
asked by Mandee 
Science
What is a detailed explanation of Kinetic and Potential energy
asked by Soraya 
Math
Joel has $20. He needs a calculator that costs $12 and some notebooks that cost $2 each. Part A: Write an inequality that can be used to find the number of notebooks,n, that Joel can afford to buy. 12+2n ≤ 20 PART B: What is the graetest possible value
asked by Jasmine 
Math
Joel has $20. He needs a calculator that costs $12 and some notebooks that cost $2 each. Part A: Write an inequality that can be used to find the number of notebooks,n, that Joel can afford to buy. 12+2n ≤ 20 ***PART B: What is the graetest possible
asked by Jasmine 
math
(x+1)(x1)=5(x1)
asked by Anonymous 
spanish
How did Europeans transform life in argentina and Chile? Please help me. Thank you.
asked by lindsey 
Math
According to a recent study, 46% of all adults have back problems. If 7 adults are randomly sampled, what is the probability hat 07 of the adults have back problems?
asked by Curious Student 
Life Science
What land animal is not a species?
asked by Jordan 
English
I don't understand this poem. Well, I understad the first part until she starts talking about the blood on her sheets and then I am lost. I have to do a presentation where I just talk about what the poem is about and then I have to ask the class some
asked by Nicole 
science
How might sand form in nature?
asked by astrid 
history
Who is the only woman currently on the U.S. supreme court?
asked by Mandee 
Law
How will law affect health care and human service organizations?
asked by Michelle 
Calculus!!!
the derivative of cot^3sqrtx Do you use prduct rule, if so what is your u,v, dv, or du.
asked by Matt 
chemistry
what chemical properties of the nitrogenous bases contribute to stability of DNA?
asked by emi 
science
what is the process called when a plant can alternate between sexual and asexual reproduction
asked by MaKayla 
mult.
what is: 9,436 x 7 
asked by Jacob 
Law
I am having a hard time and very pressed for time. Thanks in advance;) Select a current or proposed law that impacts the delivery of health care or human services. „FƒnWrite a 1,050 to 1,400word paper in APA format that answers the following
asked by Need help before midnight...help 
history
who is the senator from Illinois trying to get democratic nomination? I tried googling it, and got a variation of answers
asked by Mandee 
history
Who is the current leader of Russia? Is it Victor Zubkov or Vladmir Putin?
asked by Christie 
Science
What are some problems that can arise when using recrystallization in an experiment? One could be not using the appropriate solvent... any other suggestions? Thanks ahead of time.
asked by Meche 
health and human service
can anyone give me some ideas on the greatest concerns on the current state of human and health service workers industry?
asked by alley 
language/reading
how do you do a character continuum? ex. good/evil
asked by jordan