Questions Asked on
June 28, 2011

Chemistry
Consider the combustion of liquid methanol, CH3OH (l) CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = 726.5 kJ What is for the reaction represented by this equation? Express your answer using four significant figures
asked by Lisa 
Physics
A frog in a hemispherical bowl, as shown below, just floats in a fluid with a density of 1.26*10e3 kg/m3. If the bowl has a radius of 6.16 cm and negligible mass, what is the mass of the frog?
asked by Drew 
Chemistry
Energy, q, w, Enthalpy, and StoichiometrySource(s): Consider the combustion of liquid methanol, CH3OH (l). CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = 726.5 kJ Part A: What is the enthalpy change for the reverse reaction? Express your answer using four
asked by Lisa 
physics
A satellite explodes in outer space, far from any other body, sending thousands of pieces in all directions. How does the linear momentum of the satellite before the explosion compare with the total linear momentum of all the pieces after the explosion?
asked by Angel 
physics
a skater holds her arms outstretched as she spins at 140 rpm. What is the speed of her hands if they are 125 cm apart?
asked by Kate 
Physics
Hey, it's me again, Can someone help me with this question? A water balloon is dropped from the top of a building. Assume the balloon does not break when it strikes the ground. If the water balloon falls a distance of 21m, what is the maximum temperature
asked by Josh 
statistics
Assuming that the weights of newborn babies are normally distributed with mean 6.5 pounds and standard deviation 1.2 pounds, how many babies in a group of 80 do we expect to weigh more than 8.9 pounds? Please show work Thank you
asked by Harley 
Chemistry
Consider the combustion of liquid methanol, CH3OH (l) CH3OH (l) +3/2O2 (g) = CO2 (g) + 2H2O(l) H = 726.5 kJ What is for the reaction represented by this equation? Express your answer using four significant figures
asked by Lisa 
phtsical science
Which has greater momentum, a 2.0kg hockey puck moving east at 2.5m/s or a 1.3kg hockey puck moving south at 3.0m/s?
asked by Micah 
physics pls help
A sound source producing 1.00{\rm kHz} waves moves toward a stationary listener atonehalf the speed of sound. The frequency that the listener will hear is2000 Hz. when the source is stationary and the listener moves towardthe source at onehalf the speed
asked by dan pogi 
math
in a distribution of 160 values with a mean of 72,at least 120 fall within the interval 6777. approximately what percentage of values should fall in the interval 6282? use chebyshev's formula.
asked by ellen 
physical science
A marble is rolling at a velocity of 1.5 m/s with a momentum of 0.10 kg m/s. What is its mass?
asked by Micah 
physical science
A object that has a mass of .25kg is moving with a momentum of 5 kg„ªm/s. What is its velocity?
asked by Micah 
Physics
A 5 kg ball is initially at rest at the top of a hill 10m high. If it rolls down the hill (converting all of its potential energy to kinetic energy,) what is the maximum kinetic energy it could have at the bottom of the hill? I am not sure what formula to
asked by Jordan 
algebra
Leah has x halfdollars and y nickels, while James has x quarters and y dimes. Both have a total of 3$ . Compute the ordered pair(x,y).
asked by jb..bb 
physics
Two identical cars have the same speed, one traveling east and one traveling west. Do the cars have the same momentum?
asked by Angel 
physical science
how much heat must be added to 1.0 kg of water at 100 degrees Celsius to convert it to steam at 100 degrees Celsius? i know that normally when the temperatures are the same, the heat added is zero, but i think that in this case i need to do something
asked by miley 
Geography
How do the monsoons and the mountains influence the climate in South Asia? Include in your answer an analysis of how monsoons can be responsible for survival and hardship in this region. Monsoons greatly influence the climate in South Asia. In the winter,
asked by Chandler 
statistics
Classify the variable as nominal, ordinal, discrete, or continuous, and explain: Customer’s driver’s license number
asked by chris 
Algebra 1
Candy worth $2.45 per pound is mixed with candy worth $2.30 per pound.How much of each kind of candy must be used to have 30 pounds of a mixture worth $2.35 per pound?
asked by Bella 
science207
How much would be appropriate for wealthy countries to contribute to global health? Why should we do more than we do now? What’s in it for us?
asked by tamika 
Math
There are 5 red marbles, 8 blue marbles, and 12 green marbles in a bag. What is the theoretical probability of randomly drawing a red marble?
asked by KRH 
godby
Fernando is going to draw a marble from the bag, replace it, and then draw another marble. What is the probability that Fernando will get a green or blue marble on the first draw and a pink on the second draw?
asked by Anonymous 
Physics
In an intense battle, gunfire is so intense that bullets from opposite sides collide in midair. Suppose that one (with mass M= 5.12 g moving to the right at a speed V= 214 m/s directed 21.3 degrees above the horizontal) collides and fuses with another with
asked by Casey 
physical science
A steel ball whose mass is 2.0 kg is rolling at a rate of 2.8 m/s. What is its momentum?
asked by Micah 
physics
An object is thrown upward at v0 from the surface of a small spherical planetoid of mass M and radius R When the object is a distance R above the surface, how fast is it moving in simple terms of v0, R and M?
asked by colton 
English
Okay, another question on the Diary Of A Young Girl by Anne Frank. In the book, Anne says this statement: "There is nothing we can do but wait as calmly as we can till the misery comes to an end." How does this statement help to place readers in the
asked by Court 
science207
Why do you think controlling greenhouse gases is such a difficult problem? List some of the technological, economic, political, emotional, and other factors involved. Whose responsibility is it to reduce our impacts on climate?
asked by tamika 
statistics
Weights of a certain model of fully loades gravel trucks follow a normal distrbution with mean = 6.4 tons and standard deviation = 0.3 ton. Waht is the probability that a fully loaded truck of this model is a. less than 6 tons? b. more that 7 tons? c.
asked by Harley 
Chem
How would I make a 0.25M solution of sodium bisulfite?
asked by Talia 
physical science
When you are driving a golf ball, a good followthrough helps to increase the distance of the drive. A good followthrough means that the club head is kept in contact with the ball as long as possible. Why does this technique allow you to hit the ball
asked by Micah 
alg 2
A rectangular plot is 30 feet long and 20 feet wide. The area will be doubled by adding a strip at one end and another strip of the same width on one side. What would be the width of the strip?
asked by Shannon 
mathmm
How to make a sign diagram
asked by Alex 
economics
1. why is the subject of managerial economics relevant to problem of global warming? 2.explain with examples why it is important for managers to have good theories
asked by kevin eli 
English
How would you interpret the messages in the poem Anne received from her father for her birthday? I read them, but don't understand at all.. of course it makes sense I don't understand.. I am a 10 year old doing a 13 year old's work because I skipped a few
asked by Carlie 
physics
if a 5microfarad capacitor is charged by a 20volts battery and it is then connected across an uncharged 20microfarad capacitor , find the potential energy
asked by Edward 
calculus
After x weeks of prcatice, a student can type f(x)=80(1e^0.3x)words a minute. How sooon will the student be able to type 60 words per minute? (Round to the nearest tenth)
asked by Anonymous 
PreCalculus
Which one of the following situations would have a graph that is a constant function? (5 points) (Points : 5) The amount of money that someone earning $10.75 per hour would make The total number of days in September each year The amount of rainfall in New
asked by kalakalikalakali 
physics
a car is traveling with a speed of 15 m/s on a stratight horzontal highway. the wheels of the car have a radius of 50cm.if the car then speeds up with an acceleration of 2 m/s for 5s, find the number of revolution of the wheels during this period.
asked by abdo 
TRIGONOMETRY
CSC  COS X COT = SIN
asked by AGNES 
Derivatives
a pationt recives an injection of 1.5 milligrams of a medication, and the amount remaining in the bloodstream t hours later is A(t)= 1.5e^0.08t .find the instantaneous rate of change of this amount: a) Immediately after the injection (time t=0)
asked by Courtney 
Trigonometric Substitution
Trigonometric Substitution a. Explain why the substitution x = asin(Theta) guarantees that cos(Theta) is greater than or equal to 0 . b. What sort of restriction must we put on x and a so that the substitution x = asec(Theta)will guarantee that tan(Theta)
asked by John 
Geography
Do you think that the British influence in India was positive or negative? Explain your answer. I think that the British influence in India was both positive and negative. They helped ge the country on track by doing things such as ending slavery,
asked by Chandler 
statistics
1. A researcher is interested in comparing the effectiveness of three different kinds of therapy for anger problems. Eight participants are randomly assigned to three treatment conditions: Cognitive Therapy (CT), CognitiveBehavioral Therapy (CBT), and
asked by neil 
chem
For a mixture of two gases, consisting of 1.00 mol of N2 and 1.00 mol of CF4, at a total pressure is 2.04 atm, what is the partial pressure of N2?
asked by marl 
physics
In an experiment similar to that done by Michelson,the frequency of rotation of the eightsided mirror is 530 Hz. Calculate the speed of light in air if the distance from the rotating mirror to the stationary mirror is 35.0 km.
asked by michelle 
physical science
When you are driving a golf ball, a good followthrough helps to increase the distance of the drive. A good followthrough means that the club head is kept in contact with the ball as long as possible. Why does this technique allow you to hit the ball
asked by Micah 
english
Alright, I am also reading Anne Frank, but I'm having trouble with the question about how Anne used humor to relieve the anxiety and boredom of living in the hiding?
asked by Collin 
Chemistry
3) You make a solution by dissolving 3.4g Ba(OH)2 in enough water to make 450ml of salt solution. a. What is the molarity of the solution?
asked by Sasha 
business law
A builder constructed a house according to plans provided by the owner. The contract specified that only Reading brand pipe was to be used in the plumbing. After the house was built, the owner discovered that another brand of pipe had been used. The owner
asked by Ana 
CALCULUS
FIND EACH INDEFINITE INTERGRAL (X^2+1)^9 X DX
asked by renee 
accounting
Recording federal income tax transaction and cash dividend transactions. What annual per share dividend was paid to common stockholders in 2010? May 15
asked by DOROTHY 
PHYSICS
Which machines has more mechanical advantage pulley or incline plane? I asked this question before but did not quite understand the answers that were given to me. I think that the incline plane has more mechanical advantage in a friction less environment.
asked by Jordan 
business law
Copenhaver put pay washers and dryers in an apartment complex owned by Berryman. With four years to run on the contract, Berryman kicked Copenhaver out. Within 6 months, Copenhaver had put all equipment back into service in other locations. Copenhaver sued
asked by Ana 
English
Thank you very much for your help.I need you to check these sentences, please. 1) He plays more sports than Keith. Will you have to take a makeup exam at the end of Agust? 2) As our flight is due to land in London in the late evening, I wonder how far
asked by Henry2 
chem
Calculate the volume of hydrogen produced by the electrolysis of 54.0 mL of water at 27.°C and 1.3 atm, using the ideal gas approximation.
asked by marl 
MAT117
During the first part of a trip, a canoeist travels 68 miles at a certain speed. The canoeist travels 16 miles on the second part of the trip at a speed 5 mph slower. The total time for the trip is 3 hrs. What was the speed on each part of the trip?
asked by Leina'ala 
geometry
determine the length of the sides and the measures of the angels for the congruent quadrilaterals ABCD and A'B'C'D' there are 2 diagrams but don't know how to show it to you
asked by Carol 
Physics
A winch with a power rating of 400 W lifts a 200kg object off the ground at a constant velocity for 17 seconds. How high was the object lifted? What is the object total energy? Please indicate which equation you use, what variable corresponds to each
asked by Tina 
world geography
why did the south agrican government change its policy of apartheid in 1990 and 1991
asked by courtney 
government
1. The _____ Act mandated that at least some federal employees be chosen on the basis of merit instead of political connections. Federal Employment Pendleton Bureaucratic Fairness Civil Service 2. The cooperation between interest groups, federal agencies,
asked by taylor 
Psychology
Dr. Kyle shared the newspaper clipping with his class. "This is an unusual case, but I believe the punishment phase of the trial would have been different in another state. The crime was committed, but the defendant is not in touch with reality most of the
asked by Shawn 
physics
In Physics, it is important to use mathemat ical approximations. For instance, in a small angle approximation, tan α ∼ sin α . Find the largest angle α for which the dif ference of sin α − tan α is less than 3.52% of the sin α value.
asked by ryan 
AP World History Please Help Me Mrs.Sue
Hi I need help with this What classical institutions survived the collapse of the classical civilizations and why? I just need help with knowing Romes institutions please help.
asked by Nina 
algebra
Write in Simply form: Can you help? 6x^2+13x+6/3x^2+x2=
asked by Shun 
English
I need help finding a word that means "to make greek" using "hellen" as the base
asked by Kay 
matha
my one digit is 4.my tens i 3 plus my ones digit.my hundredsdigit is 7 less than my thousands digit.my thousands digit is 8.what number am i?
asked by Anonymous 
CALCULUS
FIND EACH INDEFINITE INTERGRAL BY THE SUBSTITUTION METHOD (X^416)^5 X^3 DX
asked by renee 
CALCULUS
FIND EACH INDEFINITE INTERGRAL BY THE SUBSTITUTION METHOD DX/1+5X
asked by renee 
PHYSICS
Does mass affect mechanical advantage in any way?
asked by Jordan 
History
What was the nature and extent of the Umayyad Empire?
asked by Anonymous 
IT
Can anyone tell me which WIMAX system you would use for last mile broadband ? with a link to a town the miles away ??? Mobile or fixed ??? Thnks
asked by Allan 
HistoryCivil War
1865: Marching through Georgia In terms of supply, how was Sherman"s march different than other Civil War campaigns? What I found was..Sherman telegraphed President Lincoln, asking him as a gift to Savannah, he would need 150 guns along with plenty of
asked by Joanne 
Physics
1. if a 0.05kg coin is hanging from 22m above the ground: a. If you drop it, how fast will the coin be moving halfway to the ground? b. How fast will it be moving just before it hits the ground? If you could point me the right direction with equations that
asked by Tina 
Public health
Why is epidemiology important in the study of health and disease in communities?
asked by Kathy 
technology
Should there be any limitations on linking. If not, why not? If so, which limitations should be in place and why?
asked by liz 
calculus
How to make a sign diagram
asked by a 
calculus
The point of inflection for graph x^3/3x^23x+7 I cannot seem to find it as stated.
asked by tish 
chemistry
how much heat would it take to raise the temperature of 52.0 grams of water from 22.0 degrees celcius to 100.0 degrees celcius
asked by Shelly 
PHYSICS
When you have more pulleys does the mechanical advantage and efficiency increase or decrease?
asked by Jordan 
Algebra 1
Solve. y=2x  7 3x  4y=8
asked by Bella 
Algebra 1
Solve. 3x  y=4 2x  3y=  9
asked by Bella 
English
I left out a few sentences.Thank you for your cooperation. 1) Do/take an exam 2) Have a holiday/go on holiday/go to London for my holiday. 3) go for a bath (in the sea, at the swimming pool),take a bath (at home), take/have a shower. 4) Don't ride your
asked by Henry2 
CALCULUS
FIND EACH INDEFINITE INTERGRAL BY THE SUBSTITUTION METHOD çX^3+X^2/3X^4+4X^3 DX
asked by renee 
algebra
I=Prt,for t
asked by Poochie 
Algebra 1
Find the coordinates of the vertex of the graph y= x^2+2
asked by Mia 
english
Example of literary and non literary prose by citing example?
asked by sonu 
biology
How do c3, c4, and CAM plants survive under dry conditions?
asked by akim 
CALCULUS
FIND EACH INDEFINITE INTERGRAL (X^2+1)^9 2X DX
asked by renee 
math
Will the three segments given below form a triangle? Explain why or why not. AB=1 INCH BC=2 INCHES AC=3 INCHES
asked by Anonymous 
philosophy
In "Some Moral Minima," Lenn Goodman argues that there are certain things that are simply wrong. Do you think Goodman is right? Using specific examples, explore the challenges Goodman presents to relativism. Determine whether you think there are such
asked by kim 
CALCULUS
FIND EACH INDEFINITE INTERGRAL BY THE SUBSTITUTION METHOD ç(X^416)^5 X^3 DX
asked by renee 
biology
Describe how the human defense line work.
asked by akim 
poetry
I need help scanning "Combing"
asked by Don 
English
Can you please check these expressions? It's really urgent. The first set of expressions concerns husehold chores whereas the others refer to what you have to do when you do the washing. 1) I have to clean the bathtub, the sink and the toilet, dry the
asked by Henry2 
calculus
how do you find the absolute maximum of 2x^3+3x^212x7 on interval (3,0)
asked by a 
CALCULUS
FIND EACH INDEFINITE INTERGRAL BY THE SUBSTITUTION METHOD X^3+X^2/3X^4+4X^3 DX
asked by renee 
calculus
I need to find the dy/dx of x^2ln(x^2)I tried to do it the way I thought, but it did not come out right.
asked by Ronald 
calculus
I see that someone else on here had the same problem, I wanted to find the solutions for 5xe^x+1 but its not really an equation.
asked by Ashley 
Calculus
FIND EACH INDEFINITE INTERGRAL BY THE SUBSTITUTION METHOD çe^3X DX
asked by renee 
Psychology
• Write a 200 to 300word response to the following: Identify and explain the scientific process (unsystematic observation, building theories, and evaluating propositions) as applied to personality psychology.
asked by Stacy 
physics
A 1,200kg car runs into the rear of an 1,800kg minivan that was moving at 6 m/s. The two vehicles are locked together after the collision and move with a speed of 12 m/s. How high above the ground would the locked together vehicles have to be raised in
asked by m 
Physics
A 30kg block sits on a ramp, with Θ=47. The ramp is 13m off the ground at the tallest point. If the block slides in the presence of friction, with μ=0.1, how fast is the block moving when it hits the bottom of the ramp? Please indicate which equation you
asked by Tina 
u.s history
what was one of the most difficult tasks that homesteaders faced?
asked by quaonna 
science
is sulphur a good conductor of electricity
asked by mainak 
Chemistry
3) You make a solution by dissolving 3.4g Ba(OH)2 in enough water to make 450ml of salt solution. a. What is the molarity of the solution?
asked by Sasha 
Calculus 2
Use the Midpoint Rule to approximate the integral (–10x+(7(x^2))) from 10 to 17 with n=3
asked by Larry 
English
Did I properly quote this sentence? Feldman is the author from my school textbook. I am not sure if I have this part right. Do I include the authors' name within the brackets() are do I leave out the author name and just put brackets around the year and
asked by Sharon 
CALCULUS
FIND EACH INDEFINITE INTERGRAL BY THE SUBSTITUTION METHOD e^3X DX
asked by renee 
Calc I
I need to find the equations of the tangent and normal line for x^2y^2=16, at the point (5,3). I have to show every detail for my work...then use graphing software to enter my equations, so can anyone help me showing all the details of the work so that I
asked by Kejo, Help!!!! 
English
One last question for today that I need checked. What can you assume about the effectiveness of the efforts of Dutch resistance workers to sabotate the Nazis? I just put it was very effective, but I feel that it's asking for more in the question, and
asked by Court 
health care
by creating a committe on social welfare, the American Association of Labor Legislation helped to?
asked by sara 
calculus
2x^3+3x^212x7 the absolute maximum. I need help because it seems no one else in my class knows how to.
asked by josh 
Science (Solar System)
How are the Oort Cloud and Kuiper Belt different from each other?
asked by DaniHat 
Math
The amount of background noise is important to television news reporters. One station developed the formula N = r^2 + 12t + 54 showing the noise level in decibels (N) as it relates to the time after the speaker stops talking in seconds (t). How many
asked by candy 
math
1/7 divided by 4
asked by megan 
ACCOUNTING 2
HELP HERE IS WHOLE PROBLEM.IT NEEDS TO BE JOURNALIZED PROPERLY. mAY 15fILED THE FEDERAL INCOME TAX RETURN FOR 2009. THE TOTAL TAX FOR THE YEAR WAS 124,000. DURING 2009, QUARTERLY DEPOSITS OF ESTIMATED TAX TOTALING 122,700 ;HAD BEN MADE. THE ADDITIONAL TAX
asked by DOROTHY 
Chemistry
A 2.64 L container is filled with 169 g of argon. (a) If the pressure is 10.0 atm, what is the temperature? ____K (b) If the temperature is 225 K, what is the pressure? What Gas law formula would I use?
asked by Sophie 
Community Health
Are the levels of prevention appliacble and practiced in your community?
asked by Kathy 
music
for my music homework i have to do a poster on mozarts minuets and i don't know anything about him .please help!!!!!!!!!!!!!
asked by gemma 
math
what is five times ten
asked by desmond 
CHEMISTRY
What is the concentration in normality of NAOH (19.5CM3)
asked by S.KALEKYE 
physics
what is the speed of a car in km/n if it travels 108 km. in 1 min.?
asked by junna rose 
science physcs
Two trains are passing against each other.? Two trains are passing against each other. train A is going north with velocity of 47 km/hour. train B is going south with velocity of 94 km/hour. a passenger in train A see the smoke that emitted from his train
asked by Anonymous 
trig
A 115 foot foot casts a 147 foot shadow, what is the degree of elevation to the sun
asked by mike 
Calc I
I really need assistance!! I am to write an equation so that I can graph it. I do not understand how to graph OR write the equation for: x^2y^2=16 for a tangent and normal line??? I keep coming up with the wrong answers...and the problem is I was not
asked by Kejo 
CALCULUS
FIND EACH INDEFINITE INTERGRAL BY THE SUBSTITUTION METHOD X^3+X^2/3X^4+4X^3 DX
asked by renee 
chemistry
You have an aspirin dissolving in water, with this elements ( arthritis strength BC, arthropan and Ascripitin A/D), how can you separate them to find the amout of each on in water?
asked by Mariana 
Chemistry
A 2.64 L container is filled with 169 g of argon. (a) If the pressure is 10.0 atm, what is the temperature? ____K (b) If the temperature is 225 K, what is the pressure? What Gas law formula would I use?
asked by Sophie 
physcis
use the principle of an incline plane and derive the coeffecient of stationary friction
asked by merry light 
Algebra 1
Give the value of a,b,c in equation 3x=5  0.5x^2
asked by Mia 
math
my daughter in Grade 2'her project is "MAKE A LADDER OF 8 STEPS WITH NUMBERS TO FIND ASUM TOTAL.I Can't undestood it.
asked by shalini 
physical science
There are two set pieces in a theater sitting on platforms with wheels. One is a tree with a mass of 50 kg. It is moving at 3 m/s. The other is a fence with a mass of 30 kg. If the two set pieces have equal momentum, how fast is the fence moving
asked by norma 
PreCalculus
1. Find functions f and g so that f[g(x)]=H(x) where H(x)=(1+x^2)^3 2. For f(x)=4x+1 and g(x)=x^22x4, find (gf)(x) 3. Determine f(x)=x/x^24 4. Determine the domain of f in f(x)=10sqrt3x
asked by kalakalikalakali 
dy/dx
Ln (2x^23x)^4 how to solve it. I did the steps but none of my answers are the choices
asked by Anonymous 
mathm
how do you find the absolute maximum of 2x^3+3x^212x7 on interval (3,0)
asked by Greg 
Algebra 1
The sum of the digit of a two digit number is 13. If the digits are reversed, Then the new number is 9 more then the original number. Find the original number.
asked by Bella 
Algebra 1
The sum of the two digit number is 7. The ten digit is one less than 3 times the one digit. Find the number.
asked by Bella 
algebra
(x+2)^2+(y4)^2=9
asked by Anonymous 
Algebra 1
Solve. (3^2x)+5=(9^2x5)
asked by Mia 
math
x  5 __________ = 6 4 i need help
asked by Anonymous 
Physics Equation
What is the equation for total energy (TE)?
asked by Tina 
Math
Find the probability of the following if there are 30 students in the class who have been numbered and you use a calculator to generate random numbers between 1 and 30. A number less than 10.
asked by Mike 
math
3+5x+(3)
asked by megan 
calculus
find critical values for the function sqrt x^2+x20
asked by a 
math
the proportion of the wind's energy that can be obtained from a windmill is given e(x)=4x^38x^2+4x where x is slowed find proportion x that max interval (0,1)
asked by a 
college algebra
graphing a hyperbola. 4x^2+9y^2+8x+72y4=0  just need help setting it up into an equation
asked by Carlee 
math
5x4 3/4
asked by alexio 
algebra
2/3 _ x/5 < 4/15
asked by Poochie 
calculus
how do you know when a graph concave upwards just not getting it.
asked by a 
math
82 r = 12 ???
asked by lauren