Questions Asked on
January 24, 2008

physics
a metal spoon is placed in one of two indentical cups of hot coffee. Which cup will be cooler after a few minutes?
asked by rosie 
chemistry
How much heat would be released by the condensation of 5.40 g of steam at 100 °C and the subsequent cooling of the water to 25 °C? [ÄHvap = 40.7 kJ/mol at 100 °C; Cp for H2O(l) is 4.18 J g1 °C1]
asked by jason 
Chemistry
Hey, can you help me balance this equation? Cu2S + HNO3 > Cu(NO3)2 + CuSO4 + NO2 +H2O Thanks!
asked by Matt 
biology
how are glucose and ATP the same and how are they different...help would be awesome
asked by Trey 
Calculus
The function V=4pir^2 describes the volume of a right circular cylinder of heigh 4ft and radius r feet. Find the (instantaneous) rate of change of the volume with respect to the radius when r=6. Leave the answer in terms of pi.
asked by Anonymous 
Physics
How many electrons must be removed from an electrically neutral silver dollar to give it a charge of +2.8 µC?
asked by rick 
geometry
what is the formula for the area of a regular polygon?
asked by JdS 
calc
Find m and b so that y=mx+b is a solution to the differential equation dy/dx=1/2x+y1
asked by Mischa 
Geometry
is triangle XYZ with vertices X(3,1), Y(2.4), Z(2.5) a scalene triangle?
asked by Swassy 
Math
Equal groups riddle. I am a number between 20 and 30. When you put me into 6 equal groups, there is an even number in each group and 1 is left over.
asked by Pam 
poem
We had to write a poem about some sort of abstract object or idea. Can you tell me how my poem sounds and if you could figure out what I'm talking about? "With me you can go on new adventures An undiscovered portal to the imagination. I do this in your
asked by Emily 
math
evaluate the exponential expression. write your answer as a fraction in simplest form. 1) ( 5 to the power of 3) to the power of 1 2)12 to the power of 2
asked by SYNESTER 
AP CHEM
2propanol has a delta Hvp of 701 J/g and a vapor pressure of 31.6 mmHg at 20.0 degrees C. Estimate the normal boiling point of this alcohol in degrees C. i used the clasiusclayperon equation and this is what i have so far. ln (31.6 mmHg/760 mmHg)= (701
asked by John 
AP CHEMURGENT PLEASE
at 25 degrees C liquid A has a vapor pressure of 100.0 torr, while liquid B has a vapor pressure of 200.0 torr. The heat of vaporization of liquid A is 32.0 kJ/mol and that of liquid b is 18.0 kJ/mol. At what celsius temperature will A and B have the same
asked by John 
math
when is partial factoring used?
asked by Lena 
Calculus
Find the value or values of c that satisfy (f(b)f(a))/(ba) =f'(c)for the function f(x)=x^2+3x+3 on the interval [2,1]. I can't seem to get 1/2, the answer given. [((1)^2+3(1)+3)((2)^2+3(2)+3)]/[1+2] =2
asked by Anonymous 
science
During reproduction, the sex cells containing the chromosomes M1 and Fl combine to form a fertilized egg..a. Whichalleles are on each of the chromosomes?
asked by katie sandly 
English
What is the action verb and linking verb in this sentence: The day was warm and sunny.
asked by Paige 
critical thinking
How can a person distinguish between the prejudicial and nonprejudicial use of rhetorical devices?
asked by neka 
algebra 1b
Solve each system using substitution. check your solution. a = 2/3b 3 a = 2b  18 c = 3d 27 4d + 10c = 120
asked by dillon 
chemistry
Can you help me write and balance this equation. I also have to include the physical states. Question: When manganese(Mn)is put into dissolved hydrochloric acid(HCl)it produces solid manganese(III)chloride (MnCl3) plus hydrogen. Thanks :)
asked by Miley 
Calculus
I need to find the derivative of the following problem via logarithmic differentiation, but I'm getting stuck. I know how to solve via logarithmic differentiation, but I can't figure out how to rewrite the exponent(s) as logs. Could someone help me? y=
asked by Jessie 
mental
I have a question about the psychological syndrome called gaslighting. Have there been any recent case studies of actual "gaslighting" as it's seen in the 1944 film Gaslight where psychologist have proof of one individual purposely trying to drive another
asked by Shannon 
Algebra 1
I am not good at these kinds of problems, so if anyone could show me how to do this, it would be great. Currently, there are about 270 million people in the U.S. The EPA set a goal of 35% of solid waste recylced by the year 2009. The estimate is that by
asked by Tibby 
READING
CAN SOMEONE GIVE ME A LIST OF THE CHARACTERS FROM ANIMAL FARM
asked by VICTORIA 
science
1) In a syringe, what happens to the air paricles when you push the plunger? 2) In a syring, what happens the the air particles in the bubble from the bubble wrap when you pull up the plunger? 3) Are there more air particles in the bubble when it is
asked by Tracy 
math
i am wondering if the following answer to my math problem is correct f(x)=x^34x2 [2,3] We are doing limits and are suppose to use the Intermediate value thereom the answer i put was f(2)0
asked by rudy 
biology
How would gene splicing, cloning, or stem cells help a patient with sickle cell anemia?
asked by peter 
4th grade Algebra
How to solve this problem. 3XY=12
asked by Serena 
spanish
what are the parts of a spanish name like where does the fathers last name go in their childs name
asked by renee 
Stats
Suppose the correlation between SAT Verbal scores and Math scores is 0.57 and that these scores are normally distributed. If a student's Verbal score places her at the 90th percentile, at what percentile would you predict her Math score to be?
asked by Danielle 
spelling
glue is to sticks as thorns is to? Must begin with scr spr str thr!!
asked by rose 
geography
Is there a certain rhyme out there to help study state capitals?
asked by BB 
science
Does asexual reproduction use meiosis or mitosis?why?
asked by nikki 
Life Science
When would an organism need to undergo the process of mitosis? Meiosis?
asked by Bretagne 
earht science
as the rocks in earhts surface pend amd push on the land above them, what is formed?
asked by mandy please help me 
math
x^34x2 [2,3] we have to use the intermediate value thereom. not sure how to do this.
asked by sonya 
geometry
is triangle RST with verticies R(1,5), S(4,1), T(2,1) a isosceles?
asked by Swassy 
geometry
is triangle DEF with verticies D(3,4), E(2.5), F(0,1) a right triangle?
asked by Swassy 
Linguistics
Hi I am looking for examples of voiceless/voiced words for the following places and manner of articulation: bilabial / nasal; alveolar/lateral; velar/stop plosive; velar/nasal; alveolar/stop plosive; postalveolar/gliding; dental/friction;
asked by Robert 
geometry
what is the simplest form of 2 over 18?
asked by Rebecca 
geometry
rs/st=5/7 find the indicated value of x ._______________._______. R 2x+9 S 4x15 T
asked by babygirl 
math
how can u tell if a shape is whole? like does it have straight sides?
asked by anonymous 
music
I need help studying for my term. I need to know how to identify stuff on a staff or musical notation. Like clefs, notes, signatures, etc... How should I remember these? Are there any online resources? I also need to define terms. How do I remember these
asked by william 
chemistry
Choose the groups of molecules below in which all the molecules have a net dipole moment. a. SiHCl3, O2, H2O b. HF, H2ClCH2, H2O c. HF, CH3Cl, H2O d. CCl4, HCl, NH3 e. HF, H2O, N2
asked by janet 
Social Studues=) help me plz
What are longhouses made out of?
asked by Usher 
spelling
fifteen is to five as nine is to ? must start with one of the following :scr,spr,str, snd thr
asked by shawna 
Chemistry
What would increase the pressure inside a tank of helium gas?
asked by Monique 
spelling
broom is to sweep as brush is to ? answer must star with scr, spr, str or thr
asked by shawna 
physical science
How far can a person run in 15 minutes if they run at an average speed of 16km/hr?
asked by Ashleigh 
social studies/science
who is Garter Brayton and what did he do.
asked by skiler allen 
math
the 4X4 square represents 1/4 of a whole shape. create three possible whole shapes. justify how u know that each new shape is one whole.
asked by anna 
studying
wut should i study for a social studies unit test in the 8th grade????
asked by sammy 
World History
1. Identify three peace efforts of the late 1880s and early 1900s. 2. Describe how each of the following served to inflame tensions in Europe:(a) nationalism, (b) imperial rivalries (c) militarism. 3. (A) Why did European nations form alliances? (B) How
asked by Roderick 
sci
what are the challenges of managing reducing solid waste terrestrial resource issue?
asked by chris 
statistics
For a particular sample of 50 scores on a psychology exam, the following results were obtained. Mean = 78 Midrange = 72 Third quartile = 94 Mode = 84 Median = 80 Standard deviation = 11 Range = 52 First quartile=68 What score was earned by more students
asked by Jennifer 
statistics
Answer the following: What does it mean to say that x = 152 has a standard score of +1.5? What does it mean to say that a particular value of x has a zscore of 2.1? In general, what is the standard score a measure of?
asked by Laly 
social studies
what are thomas jefferson's beliefs?
asked by R J Stevenson 
Psychology
What do the results of twin studies on IQ say about John Locke's tabula rasa theory? I have to write an essay based on this question. Can someone help me with info on twin studies and IQ like between monozygotic and dizygotic? I also need help figuring out
asked by Christian 
Social Studies
I hope i can be helped with this question and i would be really grateful. I have being given an essay and the question goes like this. "How can helping others make one great". I would like at least three examples. Thank you.
asked by e.v.a 
Math
how would i solve this? 2x+2y=12 would i solve for x or y? Im stuck!!
asked by Kayla 
Biology
1. In females the first meiotic cell division produces____cells. 2. One of the cells is ___ than the other and is called ______. 3. The polar body stays attached to the ____. 4. The larger cell is called the _____ and it mature into _____. 5. The second
asked by Sue 
English
I have been given an essay on should students be allowed to dissect frogs in their biology class. I have taken a positive stand but i don't know where i can get get help from. Can u pls help me?
asked by e.v.a 
math
is anyone online.
asked by Sue 
math
if 6 counters are 3/4,then what is one?
asked by apple 
math
if o o o is 1/5,then what is one?
asked by apple 
social studies
What part of the ndian Subcontinent does the Indus River Valley lie on?
asked by Jillian 
social studies
What is Brahma?
asked by Jillian 
Chemistry
The density of iron at 25 C is 7.871 g/cm^3 what is the volume of one mole of solid iron at 25 C? i understand that volume = m/d but how would i go about solving this?
asked by Matt 
math
i am having trouble iwth the following math problem: lim x>oo x/squre root 4+xsquare I am not sure if i multiple the denominator with the numerator?
asked by rudy 
Pre AP Physical Science
If a person's average speed for a 10.00 kilometer race is 5.644 meters per second, what was her winning time?
asked by Ash 
math
i am wondering if the following answer to my math problem is correct f(x)=x^34x2 [2,3] the answer i put was f(200
asked by rudy 
English
What definable elements make a poem categorized as Victorian Poetry?
asked by Camron 
algebra
1. 18 m/min = cm/s 2. 5.7 gal/h = c/min 3. 264 yd/s=? mi/h Anyone know the answers to these?
asked by kt 
math
how do i get the answer with this problem 64 division bracket(16 divison 2.4)subtraction 16 bracket the answer should be 4 but how do i get that number
asked by monnie 
science
a 45kg skater pushes off from a wall with a force of 234 n. what is the sklater's acceleration?
asked by elizabeth 
algebra
If Olivia drove x km at 60 km/h and then twice as far at 80 km/h. In terms of x, how many hours did the trip take? Give the answer in simplest terms
asked by kit 
Chemistry
I need to write and balance this equation: Sodium sulfate produces sodium oxide plus gaseous sulfur trioxide when heated. Thanks
asked by Manny 
science equations
what is the acceleration of a 8.4 kg mass if a force of 64.8 n is used to move it toward earth?f=mxa
asked by summer 
math
rewrite the expression with positive exponents.pleaze explain thanks 1)20X TO THE 8 POWER Y TO THE 8 POWER
asked by SYNESTER 
AP CHEM
what type of cubic structure is iron?
asked by Matt 
science equations
what force is necessary to acceleration a 32 kg dog at a rate of 23.6m/s2? f=mxa
asked by summer 
chemistry
Assume you are in a lab with a test tube of sulfuric acid. You drop a piece of calcium into the tube. What do you observe happening in the tube? thank you
asked by roma 
science equations
a boy standing n a high cliff dives into the ocean below and strikes the water after 2.5 s. what is the boy's velocity when he hits the water? deltav=gxt
asked by summer 
chem
In the lab, you're handed a test tube with sodium chloride dissolved in water. You add aqueous barium carbonate to the tube. What are your observations? Thanks
asked by lena 
History
Investigative reporters are bolder today than they were 30 or 40 years ago. How do you think the impact of Watergate has contributed to this boldness? Do you think investigative reporters are justified in being bold to get information for the public, or do
asked by Anonymous 
science
A person's body is thronw outward as a car rounds a curve on the highway is this newton's 1st 2nd or 3rd law
asked by summer 
MANAGING A DAILY TEACHING SCHEDULE
WHAT ARE THREE TIME MANAGING TIPS FOR TEACHERS?
asked by JAKE! 
Business
In a world without trade, what would American consumers have to pay for logitech's products?
asked by Lauren 
Algebra
I am supposed to subtract and simplify if possible. This is backward to what we had in our homework so I am confused. two fractions 4z/z3 minus 7z6/3z I need to determine what z is?
asked by Marysvoice 
Life Science
Why is the process of mitosis and meiosis both important to a living organism.What would happen if meiosis did not occur?
asked by Bretagne 
physical science
compute the density in g/cm of a piece of metal that has a mass of 0.520kg and a volume of 75cm
asked by arpa 
Calculus
An isosceles triangle, whose base is the interval from (0,0) to (c,0), has its vertex on the graph of f(x)=12x^2. For what value of c does the triangle have maximum area?
asked by Anonymous 
Stats
Fortunately, plane crashes are rare events. Suppose that commercial crashes occur on an average (mean) of 1.1 per year (Hint: Poisson). a. What is the probability that this year will be crash free? b. If there is a crash, what is the probability that there
asked by MoJo 
gov
Why does the constitution require those who serve as president to be at least 35 years old; those serving as senate be 30 years old; and those serving in the house of representatives to be at least 25?
asked by 565 
Biology for Carol/Roderick
It would be helpful if you could use the same name consistently, please. Otherwise we think we are answering the same post over and over.
asked by SraJMcGin 
Calculus
Find the average value over the given interval. y=3x^5; [3,3] I can't seem to get the answer, 0. 1/(3+3) [integral 3 to 3 (3x^5)dx] and I get 273/2
asked by Anonymous 
Question
Who is the american president? What adjectives can be used to describe him/her?
asked by joey 
advanced fuctions
Determine the intersection point of the curves y=log(x2) and y=1log(x+1). Both of them are base 10
asked by Samir 
World History 10th grade
Identify three peace efforts of the late 1800s and rarly 1900s. (1)hoped for a permant end to the scourge of war. (2)a world court to settle dispute betwwen nations. (3)the struggle for women suffrage . tell me is this is right.
asked by Sue 
Math
Solve the system by addition 2x4y=7,4x+2y1 can show one show me how to do this.
asked by T.T 
MPG's fuel economy
Which production car can you buy today that has the highest gas mileage?
asked by Mike 
Math
show that graphs of x2x/x+2y=1/3 and xy/x+y=3/5 coincide...how do you solve it?
asked by Wenny 
chem
100 mL of LiNO3, 0.241 M is mixed with 240 mL of 0.618 M Ca(NO3)2. What is the final concentration of NO3 in the solution?
asked by duff 
Holocaust
We would like to know about some info on the m=wonderful, Anne frank, So if anyone has some information on this, please write back. Thanks
asked by Angelo & Brooke 
math
Adult tickets for a play cost $13 and child tickets cost $10. If there were 22 people at a performance and the theater collected $277 from ticket sales, how many adults and how many children attended the play?
asked by amy 
math
Adult tickets for a play cost $15 and child tickets cost $6. If there were 33 people at a performance and the theater collected $360 from ticket sales, how many children attended the play? 14 children 15 children 16 children 18 children
asked by kavon 
world history
Why did European nations form alliances?
asked by Sue 
physics
How does air within winter clothing keep you warm on cold winter days?
asked by rosie 
math
Solve the system by substitution.x5y=2 ,2x+3y=17
asked by gavin 
science
I need a couple of example for a compound beside cookies and soap.
asked by Vern 
math
The sum of two numbers is 76. The second is 8 more than 3 times the first. What are the two numbers?
asked by pat 
math please help
The length of a rectangle is 8 in. more than twice its width. If the perimeter of the rectangle is 34 in., find the width of the rectangle.is it 1. 2 in. 2. 3 in. 3. 4 in. 4. 5 in.
asked by Kara 
Algebra
I have a problem, which requires I solve the following system of linear inequality graphically. my textbook is vague and does not provide online examples or instruction to assist me withinfo to work the problem. Please help? Thank you. 3x  y is lessor
asked by Carl 
Statistics
Here is my question: The size of dust particles was measured in a factory. Pictures of particles were taken with a camera attached to a microscope with 50x magnification. 9 imahes of particles were taken giving the following pixel areas of the interior
asked by Megs 
science
How does sickle cell anemia occurwhat type of mmutation is itis it a substitution, deletion, or insertion mutationor is it all three? Also, How would gene splicing, cloning, or stem cells help a patient with sickle cellwould any of these be any
asked by peter 
Electricity
A motor running at its rated power provides 2.6 lbft torque at its rated speed of 2020 rpm. The motor draws 5.6A from a 230V supply at a phase angle of 37 degrees. Determine the following: The horsepower delivered by the motor, The efficiency of the
asked by Nick 
Algerbra 1B
Solve Each Sysem Using Substitution. Check ach solution. a = 2/5b 3 a = 2b  18 c = 3d  27 4d + 10c = 120 Thanks, hope someone helps
asked by dillon 
world hisroty
Identify three peace efforts of the late 1800s and early 1900s. (1)The Hague Tribunal (2) Women Enternational League For Peace and Freedom (3) Nobel Peace Prize tell me if I'm on the right track.
asked by Sue 
gov
Didn't our founding fathers mean( " the right to bear arns") to only allow only countries to have guns for the protection of the people?
asked by 565 
music
how is to triple eight notes played as
asked by sammy 
Math
The difference of two numbers(the second minus the first) is 48. The second is 8 less than 5 times the first. What are the two numbers?
asked by Kara 
Algerbra 1B
Solve Each Sysem Using Substitution. Check ach solution. a = 2/5b 3 a = 2b  18 c = 3d  27 4d + 10c = 120 Thanks, hope someone helps
asked by dillon 
science equations
my grand daughter is having a awful time with this and i can't help her but if you would explain it to me maybe i can help here goes a skier with a mass of 48kg moves with a velocity of 11.45 m/s east. what is the skier's momentum p=mxv.
asked by summer 
AP CHEMISTRY
The unit cells for most alkali metal halides are faceentered for both the cations and anions. In the case of NaCl the sodium ion is just a little too large for the chloride ions to touch each other along the face diagonal. The unit cell edge length is
asked by Jake 
ap chem
could you please check my work? what is the volume of one mole of solid iron at 25 degrees c? 1 mol Fe/.141 mol/cm^3 = 7.10 cm^3 (the .141 came from converting the density in to moles) is that correct? then the next step in the problem is to find the
asked by John