Thursday
September 18, 2014

Posts by Angelica


Total # Posts: 112

Physics
Find the average velocity (in m/s) of an object that starts 200 meters north of town and is 1200 meters north of town after 200 seconds.
September 3, 2014

Pre cal
1.Find the domain of the function algebraically y=3x-1/(x+3)(x-1) y=(1/x)+5/(x-3) 2.Find the range of the function y=10-x^2 y=(3+x^2)/(4-x^2) Please help me understand how to do them.
September 1, 2014

math
= ( 1 + 3) * ( 6 - 4 / 2)
August 12, 2014

writing (and other)
i need HELP!i cant answer the questions about hard topics.in all subjects!please help me.........
August 9, 2014

Chem
For a particular reaction H = -32 kJ and S = -98 J/K. a.At what temp will the reaction be at equilibrium? b.If the temperature is increased from the equilibrium temperature what will happen?
July 30, 2014

Statistics
A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number who exercise ...
May 11, 2014

math
.15
May 2, 2014

Trigonometry
An observer (0) spots a plane flying at a 55 degree angle to his horizontal line of sight.If the plane is flying at an altitude of 21,000 ft., what is the distance (x) from the plane (P) to the observer (0)
April 29, 2014

math
a jar contains 26 fluid ounces of spaguetti sauce. How many cups of spaguetti sauce do 4 jars contain?
February 20, 2014

Math
(4k+5)(k+1)=0
February 13, 2014

Math
My answer, that I got, was 225.
January 16, 2014

Chemistry
How many grams of NaCl are present in a 300 grams salt solution containing 9% NaCl ?
November 6, 2013

algebra
Beatriz is creating graphs for her city’s Parks Department. Beatriz is trying to persuade the Parks Department to put in more gazebos for shade. For a local park, Beatriz wants to demonstrate the attendance as it changes every week. She also wants to show the temperature ...
October 20, 2013

physics
The amount of energy needed to power a 0.10-kW bulb for one minute would be just sufficient to lift a 1.0-kg object through a vertical distance of
August 18, 2013

chemistry
N2(g) + 3H2(g) → 2NH3(g)+ 22,000 cal equals how much ΔH
June 3, 2013

Calculus
Find constants a and b in the function f(x)=axe^(bx)such that f(1/7)=1 and the function has a local maximum at x=1/7. a = b =
March 27, 2013

Science
The rms(root-mean-square) value of a periodic signal s(t) is defined to be rms [s]=(1/T Ss^2t dt)^1/2 where T is defined to be the signal's period: the smallest positive number such that s(t)=s(t+T). What is the rms value of the sinusoid s(t)=Asin(2πf0t)? (Again, ...
January 25, 2013

Science
What is the period of the sinusoid s(t)=Asin(2πf0t)
January 25, 2013

College Algebra
I am using Hawkes Learning System (8.7 Nonlinear Systems of Equations)and my problem is x^2+y^2=13 and y+7=x^2. The answers I came up with are 2 square root of 3 and 3 for my x's. And I received (5,-4) as the y-coordinates. Is this correct?
November 14, 2012

social studies
why did the gap between the rich and poor weaken the shang
October 26, 2012

7th grade math help asap plz
i'm in the 6th grade and i know the answere to that!!
October 21, 2012

Math
which fractions are less than 5/6? 2/5 1/12 25/40 10/20 8/9 how do i know which is greater or less?
October 9, 2012

Math
which fractions are less than 5/6? 2/5 1/12 25/40 10/20 8/9 how do i know which is greater or less?
October 9, 2012

literature
What does the poet find ironic about her situation? In the poem In memory of M.B by Anna Akhmatova.
September 21, 2012

Geometry
Two straight lengths of wire are placed on the ground, forming vertical angles. If the measure of one of the angles formed is 72°, what are the measures of the other three angles? Explain your answer
September 12, 2012

Physics
A car starts from rest and travels for 7.0 s with a uniform acceleration of +2.1 m/s2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s2. If the brakes are applied for 1.0 s, determine each of the following. 12.6 m/s at braking period. How far has...
August 27, 2012

math
62 more than the quotient of 18 and 3
June 6, 2012

chemistry
Describe in detail, the steps a student needs to carry out to accurately obtain a 500 ml solution of .100 M HNO3 from a solution of 1M HNO3
April 13, 2012

physics - help !!!!!!!!
The magnitude of a vector is always : - a positive number - greater than 1 - an integer - none of the above. Thank you
April 12, 2012

government
C New judge is appointed
April 2, 2012

physics
The National Transportation Safety Board is testing the crashworthiness of a new car. The 1.87 103 kg vehicle, moving at 11.3 m/s, is allowed to collide with a bridge abutment, being brought to rest in a time of 0.463 s. What force, assumed constant, acted on the car during ...
March 11, 2012

chemistry
What is the volume of CO2 at 25 degrees C and 1.3atm if 10.0g of Cburns at STP?
February 26, 2012

Science
The rest stops the driver made are included in the calculations because that is hoe the problem is defined. However, suppose the bus driver's manager wants to know the average speed at which the driver was actually driving the bus that day while he was on the road. In this...
February 18, 2012

punctuation and grammer
My garden is full of water,because of yesterday's rain. Is this correct?
January 3, 2012

Anatomy
what is the white matter tracts in the ventral portion of the midbrain?
October 10, 2011

Math
Thank you I understand know
August 29, 2011

Math
Write the word form of the number that is 10,000,000 greater than 6,021,849.
August 29, 2011

Reading
Thank you so much I clearly understand now
June 16, 2011

Reading
Mary Olivers poem the journey explain the decision that the "you" in the poem made, and whether or not you think it was the right decision. I don't understand what their trying to say
June 16, 2011

Math
B.it has 4 right angles
April 7, 2011

economics
why was the federal reserve established ?
February 15, 2011

Language Arts
Pronuniation
January 19, 2011

11th grade
I need help interpreting a quote...." in this world goodness is destined to be defeated ".
December 9, 2010

Performing and Visual Arts
Why do humans create and perform?
November 26, 2010

U.s Gov
The fourth amendment was written in part to ensure the government did not allow ?
October 29, 2010

math
Help me with this please. I need statements and resons.
October 27, 2010

math
Given: line nm is congruent to qr; angle m and angle r are right angles; line mp is congruent to ro. Prove: triangle nmo is congruent to triangle qrp and angle n is congruent to angle q
October 27, 2010

math
inverse of y=-√(9-x^2 )
July 26, 2010

math
Find the inverse for graphing y=f(x)=3^-x
July 26, 2010

English 101
b,a,b,b,a,c,a,b,c,a,a,b
June 30, 2010

math
(x-1)(x+5) for x^2+4x-5
May 28, 2010

Chemistry
A popular brand of automobile radiator antifreeze advertises that their product (ethylene glycol; C2H6O2) provides engine protection from temperatures of -64C to 135C when mixed with water in a 50%/50% mix. What is the boiling point elevation and freezing point depression ...
April 19, 2010

answer please!!!!! Math
I'm having trouble with these 2 problems. (-7+p)(8+p) & (p-7)(p+8)
April 18, 2010

math, answer please!
I don't understand how you do these 2 problems. (p-7)(p+8) & (-7+p)(8+p)
April 18, 2010

help please, math.
(-7+p)(8+p) I don't understand this at all.
April 18, 2010

Math
(p-7)(p+8)
April 18, 2010

Language
friendliness, candied or candies, handiness, envied or envies it may help to use a dictionary if you are unsure of a word. They provide suffixes. :)
April 15, 2010

Latin prefix
don
March 31, 2010

Biology
What is the process of cellular respiration and why is it so important? Thank you.
March 25, 2010

Biology
What is the process of cellular respiration and why is it so important? Thank you.
March 25, 2010

Chemistry --really need help!
nevermind i think I get it now... thanks for your help
February 19, 2010

Chemistry --really need help!
Can you explain why (3*.3*.05) for H2 is subtracted from .2?
February 19, 2010

Chemistry --really need help!
I am really struggling with these problems!! A reaction mixture that consisted of 0.20 mol N2 and 0.20 mol H2 was introduced into a 25.0 L reactor and heated. At equilibrium, 5.0% of the nitrogen gas has reacted. What is the value of the equilibrium constant Kc for the ...
February 19, 2010

Chemistry
The initial pressure of BrCl(g) in a reaction vessel is 1.6 mbar. If the vessel is heated to 500 K, what is the equilibrium composition of the mixture? See this table for data on the reaction. P Br2 ? mbar PCl2 ? mbar P BrCl ? mbar
February 19, 2010

Chemistry
This might seem silly but in the rxn O^2- + H2O --> 2OH-, can OH- behave as both the conjugate acid and the base?? Or is it one or the other?
February 19, 2010

Chemistry
Benzene has a vapor pressure of 100.0 Torr at 26°C. A nonvolatile, nonelectrolyte compound was added to 0.309 mol benzene at 26°C and the vapor pressure of the benzene in the solution decreased to 60.0 Torr. What amount (in moles) of solute molecules were added to the ...
February 15, 2010

Chemistry
But if I cross multiply wouldnt it be .309/100 Torr since the pressure was 100 Torr when moles were .309. Once I solve for n, that is the amount of solute of Benzen--but I need the amount of solute molecules added. So to find that would I just find the difference in the moles ...
February 15, 2010

Chemistry
Benzene has a vapor pressure of 100.0 Torr at 26°C. A nonvolatile, nonelectrolyte compound was added to 0.309 mol benzene at 26°C and the vapor pressure of the benzene in the solution decreased to 60.0 Torr. What amount (in moles) of solute molecules were added to the...
February 15, 2010

Chemistry
That is what I tried using...I solved for m for when P= 100 Torr, then used that to set up an equation when P=60 Torr to find the difference, but my answer is consistently incorrect. I am setting up the algebra incorrectly but am not sure what I am missing
February 15, 2010

Chemistry
Benzene has a vapor pressure of 100.0 Torr at 26°C. A nonvolatile, nonelectrolyte compound was added to 0.309 mol benzene at 26°C and the vapor pressure of the benzene in the solution decreased to 60.0 Torr. What amount (in moles) of solute molecules were added to the ...
February 15, 2010

Math
Factor completely. Always begin by factoring the GCF. ax(squared)p-8pa-2axp
February 14, 2010

science
what isthe sun main thing on earth
December 22, 2009

5th grade math
what is the greatest common factor of this number pair? 24,28 -the answer is 4 what is the least common multiple of this number pair? 27,36 -the answer is 3
December 17, 2009

biology
hey does prokaryotes cells have cell walls
December 12, 2009

biology
and the cell is the most basic unit of life
December 12, 2009

biology
yes the cell theroy states the all liveing things contain cells a cell comes from another living cell and hold snd ill get back to you
December 12, 2009

biology
but also what puts it back to the amosphere
December 2, 2009

biology
what removes crbon from the amosphere
December 2, 2009

biology
what substance enters the food chain through photosynthessis
December 2, 2009

biology
sorry but what is the sequece of cellular respiration what you gave me is right just not what i needed
December 2, 2009

history
may i ask what grde are you in and i may be able to help you
December 2, 2009

9th grade
what is the cellular respiration formula
December 2, 2009

colloids example
what are the examples of suspension
August 7, 2009

Health Care
especially if you have braces on
July 13, 2009

Health Care
how do you use baking soda and salt to whiten your teeth. if you can then please do list some directions, thanks
July 13, 2009

Health Care
is dazzlewhite a good thing to use to whiten your teeth?
July 13, 2009

English
I love this poem, I couldn't have done better myself
July 13, 2009

Math
mathmate you are a really smart person
June 9, 2009

english 8
how am i supposed to know
June 8, 2009

english 8
I need a metaphor for Happiness, I can't think of one. please help;-)
June 8, 2009

english 8
could someone give me a metaphor which descrbes happiness
June 8, 2009

english/poetry
thanx
June 8, 2009

english/poetry
What poet/songwriter wrote these words? Like a bird on the wire Like a drunk in a midnight choir I have tried in my way to be free Like a worm on a hook Like a knight from some old-fashioned book I have saved all my ribbons for thee If I have been unkind I hope that you can ...
June 8, 2009

Science
What is a cell wall or cell membrane?
February 5, 2009

2nd grade math
Danielle has 18 marbles. All the marbles are either black or gold. There are 4 more gold marbles than black. How many black marbles are there.
December 8, 2008

8th grade physical sience
Well obviously if you are referring to the carbonate ion its ionic compound is CO3^2- so it would be gaining two electrons in the outermost shell. Therefore making the overall charge of negative two.
November 17, 2008

MATH
I AM A NUMBER. ROUNDING TO THE NEAREST THOUSAND MAKES ME 1,000. ALL MY DIGITS ARE EVEN, THEIR SUM IS 12, THEY ARE IN ORDER FROM GREATEST TO LEAST, AND NO DIGIT IS REPEATED. WHAT NUMBER AM I?
October 22, 2008

S.S 8 grade
Why do you think King George III refused to consider the colonist' Declaration of Rights?
October 13, 2008

Algabra
What is 3 x -2=
October 3, 2008

social studies
Name the middle colonies. Where were they located
September 29, 2008

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