Questions Asked on
October 28, 2007

CHEM
A) a picture shows a container that is sealed at the top by a movable piston. Inside the container is a ideal gas at 1.00atm , 20.0 *C, and 1.00L. (The pic is of a 2L container which has a piston pushed downward to the 1L level. Under the piston, under the
asked by K 
CHEM
A cylinder with a movable piston contains 2.00g of helium, He, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the
asked by K 
anatomy
if you wanted to flex your arm, and both your biceps and triceps contracted simultaneously, what would happen? and where is most of the muscle weight found in humans?
asked by sara 
physics
A 25kg child on a 2m long swing is released from rest when the swing supports make an angle of 30 degrees with the vertical. (a) Neglecting friction, find the child's speed at the lowest position. (b) If the speed of the child at the lowest position is
asked by Anonymous 
Harmonic Oscillation
The velocity of a certain simple harmonic oscillator is given by: v=(12m/s)sin [(6.0rad/s)t]. What is the amplitudeof the simple harmonic oscillator. Please show your work.
asked by ly1018 
physics
A surprising demonstration involves dropping egg from a thirdfloor window so that the egg lands on a foamrubber pad without breaking. If a 56g egg falls (from rest) 12m, and the 5cm thick foam pad stops it in 6.25ms, by how much is the pad compressed?
asked by Anonymous 
AP Chemistry
Finish the equation: Solutions of zinc sulfate and sodium phosphate are mixed
asked by Julie 
Algebra
At 3PM, two ships started sailing toward each other from ports which were 265 miles apart at average rates of 18 and 23 miles per hour. At what time were the ships still 60 miles apart? Let t=time=5 hours Let 18t= first ship=90 Let 23t= second ship=115
asked by anonymous 
math
Suppose that the time (in hours) required to repair a machine is an exponentially distributed random variable with parameter λ (lambda) = 0.5. What's the probability that a repair takes less than 5 hours? AND what's the conditional probability that a
asked by raksha 
Chemistry
Hydrogen sulfide H2S is produced during decomposition of organic matter. when .5000 mol H2S burns to produce SO2 and H2O. 281.0 kJ of heat is released. what is this heat in kilocalories. Can you help me start this please
asked by Lauren 
physics
An airplane of mass 1.5x10^4kg is moving at 60m/s. The pilot then revs up the engine so that the forward thrust of the propeller becomes 7.5x10^4 N, find the speed of airplane after it has traveled 500m. Assume that the airplane is in level flight through
asked by Anonymous 
Chemistry
a. How many moles of Na2Co3 were present in the 15mL sample? b. How many grams of Na2CO3 were present in the 15mL sample? c.How many grams of Na2CO3 are present in the 575L of the Na2CO3 solution?
asked by Monte; 
physics
A 50kg student climbs a 5m long rope and stops at the top. (a) What must her average speed be in order to match the power output of a 200W lightbulb? (b) HOw much work does she do?
asked by Anonymous 
music
why is sonataallegro considered to be dramatic and rewarding?
asked by olivia 
Physics
A box accidentally falls from the back of a truck and hits the ground with a speed of 15m/s. It slides along the ground for a distance of 45 m before coming to rest. Determine a) the length of time the box slides before stopping c) the time it takes to
asked by Alex 
Chemistry
Balance Eq.: Na2Co3+ CaCl2> CaCo3+ 2NaCl. (CHALK) Calculate the mass of a dry precipitate. Calculate the mass of moles of the precipitate produced in the reaction.
asked by Monte; 
Statistics
The 95% confidence interval is: (a) Larger than the 99% confidence interval (b) Smaller than the 99% confidence interval (c) The same as the 99% confidence interval
asked by Thano 
Chemistry
Copper dissolves in nitric acid, producing copper (ll) nitrate. After reaction with sodium hydroxide and heating, copper nitrate changes to copper (ll) oxide. Calculate the percent yield of this process if 1.235 g of copper produced 1.452 g of copper
asked by Raj 
Chemistry
a. How many moles of Na2Co3 were present in the 15mL sample? b. How many grams of Na2CO3 were present in the 15mL sample? c.How many grams of Na2CO3 are present in the 575L of the Na2CO3 solution?
asked by Monte; 
AP Physics
An airplane in a horizontal circle at a speed of 130.5556 m/s. If its wings are tilted 40 degress to the horizontal, what is the radius of the circle in which the plane is flying? Assume that the required force is provided entirely by an "aerodynamic lift"
asked by Kristen 
Physics problems
Hi, everyone who is going to read this, thank you for trying to help me, this really means a lot to me, you are saving my behind! Ok, so here it goes: I was wondering if this information is correct; please tell me if it is not A Ferris wheel is a vertical
asked by Serena 
Chemistry
The halflife of iodine 125 is 60 days. What fraction of iodine125 would be left after 180 days? my teacher didn't teach us this and expects us to know it and I don't understand!!! could you explain it please!?
asked by Taylor 
CALCULUS
if a ball is thrown vertically upward with a velocity of 80m/s then its height after t seconds is s=80t16t^2 a) what is the maximum height reached by the ball? b)what is the velocity of the ball when it is 96 ft above the ground on its way up? on its way
asked by matttt 
Physics
A plane leaves Toronto and flies with an airspeed of 2.20 x 10^2 km/h always pointing due east. A wind is blowing from the north at 8.0 x 10^1 km/h. a) What is the plane's velocity relative to the ground? b) What is the plane's displacement from Toronto
asked by Alex 
Algebra II
A feasible region has vertices at (3,2),(4,1),(2,6) and (1,2). Find the maximum an minimum values of the function f(x,y)=4xy
asked by X 
math
Find the differential of each function. a) e ^ tan(pi*t) b) sqrt (8+ln(z))
asked by asi 
pigskin geography
what are the answers to week #9 for pigskin geography
asked by breana 
Chemistry
A bullet weighing 235 grains is moving at a speed of 2.52 X 10^3 ft/s. Calculate the kinetcic energy of the bullet in joules ahd in calories. One grain equals 0.0648 g. Can someone help me out on this please
asked by Lauren 
What's another word for powerhungry?
What's another word for powerhungry?
asked by Anonymous 
Chem
Is this the balanced chemical equation for reaction between NaBr and H2SO4? H2SO4 + NaBr > HBr + NaHSO4
asked by Marisol 
Repost Social Studies for Shayla
socoal studies  shayla , Sunday, October 28, 2007 at 12:56am what were the imports and exports of colonial Maryland
asked by Writeacher 
Writing/English
I was wondering if someone could look over this softcopy resume Nicole Medina Campus Address Permanent Address Education [Click here and state your degree earned, year graduated, school attended] Courses Related to Major: Cake Decorator I started training
asked by Cole 
Resume help
I really do not find many cake decorating positions needing a resume so I went with what I am studying in school. Is this ok? Career Objective: To assist the sick as a registered nurse. I would also like to become a traveling nurse at some time to. I am
asked by Cole 
Algebra II
Solve the following system. Then explain what your answer means in the context of the problem. 3x+3y=15 x+y=4
asked by Taylor 
Writing/English
I was wondering if someone could look my softcopy resume over. Is this good for a softcopy? Thanks for the help! :) Name Address Cake Decorator I started training to be a decorator in 2003. I became a part time decorator about a year later in 2004. Now in
asked by Cole 
Algebra
The measure of the largest angle of a certain triangle is 6 times the smallest. The measure of the remaining angle is 100 degrees less than te sum of the other two angles. Write a system of 3 equations you could use to solve this problem. x=smallest
asked by Eric 
Psychology
How do traumatic brain injuries occur. I don't mean like concussions or contusions though. I am trying to write a report on how brain injuries affect personality but i am not sure how a serious brain injury occurs.
asked by Christian 
Cacluluc CHECK
A survey of one thousand people found that 70% of the people have a CD player, 85% have a telephone, and 45.2% have a computer. At least how many people have all three objects? Is the answer 152?
asked by Matt 
Biology
What is the location and function:  the speech area of the brain  the comprehension area of the brain
asked by Alex 
algebra
1750 divided by 2 times 1/5 equals x divided by 2/6 is that a 3 step equation and should the answer turn out to be 58.333333333
asked by anonymous 
AP US History
I have an essay test tomorrow and i am having trouble with this question. In what ways was Andrew Jackson a states' rightist and in what ways was he a nationlist? Thanks for any help you can give.
asked by Amanda 
math
The only perfect number of the form x^n + y^n
asked by l 
History
Who are the Greek gods/goddesses that make the 12 members of the council? I think they were called the Olympians. I tried researching it online but websites are giving me different answers.
asked by Lisa 
Algebra II
What is the first step for solving this system by substitution? DO NOT SOLVE!! 3x2y=8 x+7y=10 How many solutions does this system of equations have? 3y6x=12 y2x=4 My answer is 1 solution. Is this correct?
asked by JaneLee 
Science
Ok so I have to use kinematic equations to solve these. But I make like a X and Y chart Ex...XVix=2.89 dx=? t=? YViy=0 dy=3.7 and so forth. 1. A cliff diver strikes the water 10.3 meters from a cliff 25 meteres high. At what horizontal speed did he leave
asked by Andrew 
anatomy
if you wanted to flex your arm, and both your biceps and triceps contracted simultaneously, what would happen? and where is most of the muscle weight found in humans?
asked by sara 
calculus
determine the open intervals on which f(x) is increasing, decreasing, concave up and concave down. f(x)= tanx, pi/2< x< pi/2
asked by sara 
Algebra II
Solve this system by substitution 2x3y=12 x4y=6
asked by JaneLee 
Statistics
For two normal distributions with the same mean, but different standard deviations, the 95% confidence interval will be: (a) The same for both distributions (b) Larger for the distribution with the smaller standard deviation (c) Smaller for the
asked by Thano 
math
1) Michelle reads 1,200 words in 7 minutes, and Tricia reads 700 words in 3minutes. Who is the faster reader 2)Write 566 2/3% as a fraction or a mixed number 3)Solve for the base in the following statement 11% of what number is 77 4)Simplify 8 qt 7 pt
asked by chester 
writing.....please i need help...
what would be a good imagery to start of my paragraph about how downloading music is a downfall to the music industry?? i really need help...
asked by Jose 
algebra
i need to download a graphing calculator onto my computer. i have tried grapgcalc . com and gcalc . com but my computer will not dowmload from these sites. anyone know where i can download a graphing calculator?
asked by Ally 
physics
A 650kg elevator starts from rest. It moves upward for 3s with constant acceleration until it reases its cruising speed, 1.75m/s. (a) what is the average power of the elevator motor during this period? (b) How does this compare with its power during an
asked by Anonymous 
Physics: Equilibrium and Inclined Planes
Two forces act on an object. One force is 8.0 N horizontally and the second is 10.0 N vertically. Find the force that will produce equilibrium for the object.
asked by Anayeli 
Physics and Dr. Bob
Not be to a nag, I was just wondering (in addition the energy section from my previous post)...in the wheel the electrical energy is present due to the motor. THis is then turned into kinetic energy, from the magnetic field that is created due to the
asked by Serena 
Social Studies
I have to do a 1 mintute report on Mother Jones, acting as if i was her. I have all the facts, but can't think of a good opening sentence. I got a closing one though..
asked by Anonymous 
glucose question
Assume that the organism is living areobically and that one molecule of glucose oxidized completely to 6 CO2 generates 30 molecules of ATP, how many glucose molecules must be oxidized to supply the energy for the synthesis of all these different nucleic
asked by army 
sexual development
32. What happens to the sexual development of a fetus (genes not specified) that is exposed to lower than the normal amounts of both testosterone and estrogen during early development? a. It develops a more or less normal male appearance b. It develops a
asked by me 
Spanish (Foreign Language)
What is 'treasure chest' in Spanish?
asked by Elizabeth 
Physics
How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?
asked by Soly 
GENETICS
With regard to pattern baldness in humans (a sexinfluenced trait) a woman who is not bacld but mother is bald, has children with a bald man whose father is not bald. what are their probabilities of having the following types of families? a) their first
asked by Dan 
fish tank;; deals with volume. :]
A cylinder shaped fish talk is 40cm high and has a radius of 12cm. The tank with be layed with a decorative gravel on the bottom. The blue layer will be 2 cm high. The yellow layer will be 3 cm high. And the green layter will be 2cm high. [assume water
asked by blah. volume... 
spanish
is there anywhere that i can get a translation of some problem words?
asked by chelsea 
World History
Name the natural berriers that protected egypt
asked by vicki 
Algebra 1
A LINE CONTAINS (9,Y) AND (6,3). IT HAS A SLOPE 6. FIND Y
asked by Jay 
Islam
Assalamualaikum I Rely need help your help to answer this question. 1) In the Quran 3:159 “…then when you have taken a decision, tawakkal (put your trust )in Allah. Syed Qutb , says that the Rasul s.a.w. quotes this verse when the sahabah went to see
asked by khairul 
FRENCH
I wasn't sure if I had to post a new thread but here's what I have from before corrected to the best of my abilities so can anyone please read it over again and help correct the mistakes? Thanks! Il était une fois, dans une contrée bien loin d’ici, un
asked by Jo 
spanish
what does fui a la oficina de correos cerrada cafe mean?? and does it make sense>?
asked by chelsea 
English
Any one got any book recommendations for a 8th to 9th grader?
asked by Anonymous 
Chemistry
The halflife of iodine 131 is 16 days. If you start with 100 gram sample, how many halflives have past when you have less than a gram left?
asked by Taylor 
math
To make shelves for a bookcase, Nate needs 7 pieces of lumber, each 45 inches long. Nate has several 10foot lengths of lumber in the width and thickness he needs. How many of these 10foot boards will Nate use?
asked by Mary 
FRENCH
Can someone PLEASE proofread this? It's due tomorrow... Après un certain temps, Bugs Bunny a surgi et il a dit « Quoi de neuf, docteur? » Lorsque Markey lui a rapporté qu'il recherche les trésors de la Montagne des Bonbons, le lapin débonnaire a
asked by Jo 
geography
i need a three page essay on kielder water but all ive done is one page! i need help! 2 days til the deadline! aaaaaaaaaaargh!
asked by i forgot my name! 
English
How does this poem sound? I told my friends I was no scaredy cat, Not afraid of snakes, nor bears or bats. The said” Oh, well that’s sure to change, When you spend a a night in a house that’s strange.” They dared me to sleep in an abandoned house
asked by Anonymous 
science
what is the mass of 15mL for mercury?
asked by Kerry 
Algebra II
How do you find the inverse of a matrix?
asked by JaneLee 
Writing/English
So sorry...what if you do not have experience in a field but are studying to be in it. I could state everything I have done but no background... should I explain that in the resume?
asked by Cole 
Physics Stuff
Hi, everyone who is going to read this, thank you for trying to help me, this really means a lot to me, you are saving my behind! Ok, so here it goes: I was wondering if this information is correct; please tell me if it is not A Ferris wheel is a vertical
asked by Serena 
insulin levels
13. Consistently low levels of insulin will produce ___ appetite; consistently high levels of insulin will produce ___ appetite. a. Increased…decreased b. Decreased…increased c. Decreased…decreased d. Increased…increased I chose answer D. because
asked by me 
eating binges/emotional psychology
18. Compared to overweight people, normalweight people are ___ likely to engage in eating binges, and ___ likely to experience emotional problems. a. Less…more b. Less…less c. More…less d. About equally…about equally I chose answer C. because
asked by Blaine <3 
absolute maximum
absolute maximum of (x^24)/(x^2+4) the critical numbers i got was x=0,2.59, and 3.09 the absolute minimum is f(0)=1 what is the absolute maximum: is it both f(4)=(f(4))=.6? or can there only be one
asked by julie 
Nautical Studies
I am aware a magnetic compass is useless for navigational purposes in the region of the magnetic north pole. How far away from the magnetic north pole do you need to be before the magnetic compass will function effectively? Depending on the answer does
asked by Mike 
Physics
I am trying to come up with a rule of thumb/rough guide to determining the velocity of a person jumping from various heights into water  for example from the side of a ship. Not being a natural mathematician I am having difficulties. My own conclusions if
asked by Mike 
social study
10 racially motivated and historical events that made an mpact on the country from 19802000
asked by adei 
English  need one word that best decribes...
What's one word that describes a villain who will do anything like deceit people, abuse his powers and murder to get what he wants (Please DON'T SUGGEST the word MACHIAVELLIAN!!!!!!!!...)
asked by Anonymous 
FRENCH
Can someone please proofread this? It's the next part of my story. Thanks! Petit Markey, aventureux comme toujours, a entrepris sur son voyage vers les citrouilles illuminées avec les grands nez anormalement qui ont ressemblé les poires très poilues. En
asked by Jo 
IB Math Studies
Would it be appropriate to use a chisquare test for analysis of statistics in the following topics? •Number of Surgical Fatalities vs. U.S. State •Number of professional men’s soccer injuries vs. country of their team
asked by Jake 
Nautical Studies
I am trying to find an up to date position for the Magnetic North Pole. All searches I have made state positions that are several years out of date. Can anyone help Thanks Mike
asked by Mike 
biology
another name for a large molecule
asked by trav 
civics
minnesotas state constitution was written in what year?
asked by sabrina 
math
The only perfect number of the form x^n + y^n
asked by l 
AP US History
what happened during the women's education reform? What did they fight for?
asked by Jennifer 
english
Why were people accused of being witches i mean i understand that some were accused because of people not likeing them but how did this all get started?
asked by chelsea 
physics
how do we use indirect measurements in the real world
asked by beckii 
SCIENCE
I REALLY need help. how do you set p a population density problem??? i totally forget!!
asked by madison 
biology
correction to earlier question another name for a very large molecule
asked by trav 
crt 205
What kind of fallacy is this example? It takes someone with a really big heart to give to our charity,and you seem like someone who cares more than most.
asked by Ricki 
Math
What is 875 times 1/5 equal
asked by Kerry 
Statistics
what is a least squares regression line?
asked by Anonymous 
Engineering
How does an air conditioner use the first and second laws of thermodynamics?
asked by Kayla 
lit.
is there anywhere that i can read the crucible on the internet because i left my book??
asked by chelsea 
Science
A girl makes a sample of a new material and says that the density of the material is 0.85 g/cm. Can you tell how large a sample she made? How?
asked by Ash 
lit
We are learning how to put the beliefs and actions of the people during the Salem witch trials in todays terms and i used the war on terrorism...would that be the right idea?? maybe because we are trying to find the poeple that are differant than us &that
asked by chelsea 
find the rate
240 lbs of fertilizer/6 lawns
asked by will 
math
what is 875/5 divide that by 26
asked by Kerry