Questions Asked on
January 2, 2009

chemistry HELP
A 46.2 gram sample of copper is heated to 95.4 degrees celcius and then place into a calorimeter containing 75.0 grams of water at 19.6 degrees celcius. The final temp of the water and copper is 21.8 degrees celcius. Calculate the specific heat capacity of
asked by lyne 
human resources
What longterm recruiting measures should US hospitals strive for?
asked by China 
AP Stats
Surveys indicate that 5% of the students who took the SATs had enrolled in an SAT prep course. 30% of the SAT prep students were admitted to their first choice college, as were 20% of the other students. You overhear a high school student say he got into
asked by Stephanie 
CALCULUS
AN EQUATION OF THE LINE NORMAL TO THE GRAPH OF Y= SQRT[3X^2 + 2X] AT (2, 4) IS??
asked by JIM 
Physics
A hot air balloon is ascending straight up at a constnat speed of 7.0 m/s. When th balloon is 12.0 m above the ground, a gun fires a pellet straight up from ground elvel with an initial speed of 30,0 m/s. Along the paths of the balloon and the pellet,
asked by Anonymous 
11th grade
A sample consisting of 22.7 g of a nongaseous, unstable compound X is placed inside a metal cylinder with a radius of 8.0 cm, and a piston is carefully placed on the surface of the compound so that, for all practical purposes, the distance between the
asked by rikita 
chemistry again :)
A compound containing only sulfur and nitrogen is 69.6% S by mass; the molar mass is 184 g/mol. What are the empirical and molecular formulas of the compound? i solved for empirical and got a 1:1 ratio so it would be SN. for the molecular do i take
asked by lyne 
chem
which element has a more favorable (exothermic) electron affinity? K Mg how do i determine this?
asked by lyne 
physics
An object starts from rest and accelerates uniformly down an incline. If the object reaches a speed of 40 m/s in 5 seconds, what is its average speed?
asked by Kevin 
physics
The average velocity for a trip has a positive value. Is it possible for the instantaneous velocity at any point during the trip to have a negative value? (I'm thinking yes because derivatives can be negative but I'm not sure). also A ball is dropped from
asked by Anonymous 
chem
a certain substance strongly absorbs infrared light having a wavelength of 3.75µm. what is the frequency of this light in hertz? i know that i have to use the equation c = frequency x wavelength and that c = 2.998 x 10^8 m/s. how do i convert that to
asked by lyne 
Biology
What are two types of materials or observations that would necessitate the use of the stereoscopic microscope? What organelles are visible with the electron microscope but not with the light microscope? (we've been studying single celled organisms and
asked by anna 
mathb
what is the smallest positive angle which satisfies the equation 2cosx5cosx+2=0
asked by millz 
Physics
Two knights on horseback start from rest 88.0 m apart and ride directly toward each other to do battle. Sir George's acceleration has a magnitude of .300 m/s^2, while Sir Alfred's has a magnitude of .200 m/s^2. Relative to sir Ggeorge's starting point,
asked by Dala 
art
for my homework assignment i have a picture of Michaelangelo , creation of Adam painting i have to describe what i think is happening in the painting and also write a story about the painting . Ive described the painting but i am struggling with the story
asked by Ashleigh 
Global
For a global paper I have to take 20 notecards my topic before I write it. I am looking for online sources that are either professional or they are endorsed by a professor. My paper deals with the adaptations humans made in order to survive based on the
asked by Anonymous 
9th chemistry
I don't understand the formula for sodium hydrogen phosphate. Can you please tell me it and explain it?
asked by alexa 
math
matthew travels two and one half miles to get to school. this is 3 times the distance that Jennifer travels. how far does Jennifer travel?
asked by ???E 
Precalc
What does something have to be inorder to be considered a function. I'm not talking about the verticle line test or somethng to verify, im saying in words. like can it not be negative or somehting?
asked by Lauren 
Algebra
I have to solve the following equation: x+y=9 xy=54 I changed the first equation to y=9x to solve for y. I got x(9x)=54 and then 9xx^2=54. I then changed 9xx^2= 54 to x^2 +9x54=0. I got stuck around here, can someone explain...
asked by rob 
math
how to make multiplication and division easier?
asked by lorenzo miguel palacios 
books
examples of odysseus struggles in the odyssey portrayed in real life
asked by Anonymous 
Math
Shoes are on sale, buy one and get the cheaper pair 50% off. Jane and Janette wants to buy shoes and share equal amount of discount. If the pair of shoes that Jane wants to buy is 120, and the pair that Janette wants to buy is 60, how much do they each
asked by Tim 
Math
Find an equation of the parabola with vertex at the origin that passes through the point (36, 2) and opens to the left. I believe you start with (xh)^2 = 4p(yk) and plug in the given point and (0,0), and solve for p. I got y^2 = 144x. Is this correct?
asked by Momo 
Physics ideal gases
Would someone check my thinking please. PVT of an ideal gas (nitrogen) are all given. I've used PV=nRT rearranged to get the number of moles. Then, U= 3/2nRT to get the internal energy of the sample. Am I on the right track? Thanks.
asked by charlie 
Math
How do you find the surface area of a triangular prism.
asked by Anonymous 
sra JMcGuin spanish
is the english grammar correct also. today i have my math tutor from 9 to 12 so i am trying to finish this up Can you please explain this one: yo era capaz a de conseguir = (you must drop "a") = yo era capaz de conseguir i cant find the error i made. El
asked by sam 
english  writing
I'm looking for a succinct way to help one of my sales guys write better. His syntax and use of verbs and adjectives is often weak. Here is a typical short example. What comments or observations would you make to help me help him? "Sure I have no problem
asked by Tom 
10th grade Algebra
8h^24h
asked by Yaya 
Algebra
27x^21/3y^2
asked by Nanit 
Algebra 1
Hey :) Can anyone appoint me to a/some good link(s) for Nineth Grade Algebra? Thank you.
asked by Jessie 
Algebra
49(ab)^2(cd)^2
asked by Bob 
PreCalc
I am supposed to graph this y= x^2+2x he told us to coplete the square to get us the vertex, but how do i complete the square with a  in front of the x^2??
asked by Lauren 
Poetry for Avie
Here is a book to look for, if you aren't happy with the poems you now have: The River Is Wide / El río es ancho. Twenty Mexican Poets/A Bilingual Anthology. The ed. is Marlon C. Frick. tr. Albuquerque: University of New Mexico Press, 2005. Sra
asked by SraJMcGin 
sra JMcGuin spanish
HI I am not sure if I put in all the corrections in properly I tried please let me know thanks El evento más importante para mí del año pasado fue cuando entregué mi proyecto de historía. When I was in eighth grade history in Ms. Harvey's class, I had
asked by sam 
Biology
Which of these organisms have cell walls? Which have chloroplasts? Describe their organization. Paramecium Amoeba Chilomonas Volvox Paranema I've tried searching on the web, but the pages don't mention chloroplasts or cell walls. Which means they either
asked by anna 
economics
what is the efffect of monetary policy in setting macroeconomic policy
asked by jessica 
algebra
solve the following equation 5x + 4y = 12 Please show work... Thank You!!!
asked by Sophie 
science
Is obsidian (igneous) extrusive or intrusive.
asked by sayd 
conversion
what is the easiest way to convert 11 liters to gallons
asked by jacob 
spanish sra mcguin
Yo recibí una a por mi trabajo. Eso me enseñó que yo era capaz de conseguir una buena nota en un proyecto difícil 1. does the "a" belong before por? 2. is it a period after trabajo?
asked by sam 
math
solve the equation (x5)^2=10
asked by key 
accounting
Malissa is an accountant. Sometimes printouts of financial statements have errors and are not usable. Malissa doesn't like to waste anything, so she takes the unusable financial statements to her son's day care center to use for drawing paper.
asked by China 
10th grade Algebra
6ab^2(qr)^2
asked by Yaya 
AP human Geography
Hey, I have been searching to find what stage France is in referring to the demographic transition. could you Please help me. I would greatly appreciate it. Thanks so much.
asked by Tori 
Algebra
a(h^2k^2)b(kh)
asked by Bob 
Algebra
r^2r(@ab)2ab
asked by Nanit 
Algebra
I need help factoring 64b^2(q+r)^2
asked by Christina 
Math
which ordered pair can be generated by using the rule (9x3)
asked by Shameke 
math
How is a determinant found using expansion by minors? The only way I was taught to do it was by using diagonals.
asked by Anonymous 
government
declarartion of independence
asked by nicole 
math
what is the inverse of 3 4 4 8?
asked by Anonymous