Friday
December 19, 2014

Posts by Maria


Total # Posts: 1,557

math
how do you simplify 15 over 27 ?
January 5, 2013

personal statement
i need to write personal statement using Common App. Option 3: Indicate a person who had had a significant influence on you, and describe that influence. I do not know how to organised the paragraph and how could I add more to essay and what to end please. MY DEADLINE IS COMING.
January 4, 2013

colllege algebra
use synthetic division to factor x^3-2x^2-9x+18
January 4, 2013

college algebra
let f(x) be polynomial function. explain how to use the factor theorem to check if x) is a factor of F(x)
January 4, 2013

ap calculus
How is the ap calculus AB and BC test? Is there any online practice test?
January 2, 2013

Chemistry
The relationship between ionization energies as evidence for electron configuration for elements?
December 20, 2012

CHEMISTRY
FOR MOST LABS THAT WE PERFORM , THE MEASURED WALUES ARE ALWAYS COMPARED TO THE ACCEPTED VALUES USUALLY IN THE FORM OF PERCANT ERROR . WHY IS THIS DONE?
December 19, 2012

Chemistry
What trends the atomic radii of group 2A ?what trends the atomic radii of period 3? Why this trend occurs? Ans Atomic radii of group 2A increases . Atomic radii of period 3 decreases . I don't know how to answer the last question!! Please help me !
December 14, 2012

Chemistry
What trends the atomic radii of group 2A ?what trends the atomic radii of period 3? Why this trend occurs? Ans Atomic radii of group 2A increases . Atomic radii of period 3 decreases . I don't know how to answer the last question!! Please help me !
December 14, 2012

chemistry
Wat is the volume of a 200g object that has the. Density of 1.27L?
December 13, 2012

chemistry
Wat is the volume of a 200g object that has the. Density of 1.27L?
December 13, 2012

math hurry please
so 3c + 5a=115 and a+c=33 so if we plug in then 3*8 is 24 and 5*25 is 125 so that doent work so i just go on from their! Thanks
December 13, 2012

math hurry please
Each child ticket for a ride costs $3, while each adult ticket costs $5. If the ride collected a total of $115, and 33 tickets were sold, how many of each type of ticket were sold? A. 8 child and 25 adult B. 17 child and 16 adult C. 156 child and 41 adult D. 25 child and 8 adult
December 13, 2012

Chemistry
n artifact was found and tested for its carbon-14 content. If 83% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.) yr
December 11, 2012

english
thnks
December 10, 2012

english
how about for Germany
December 10, 2012

english
college graduation rates in USA and education statistics.
December 10, 2012

Physical Education
What is the average weight for 8th grade girls?
December 9, 2012

chemistry
How many grams of sodium hydroxide is needed to react with 100 ml of a 1.4 M nitric acid for complete neutralization to happen.
December 8, 2012

english
thnks
December 6, 2012

english
what else can we say?
December 6, 2012

english
i have to write an essay on why should we have freee colllege education improvement in U.S.A. Why it is problem. Can u please give the reason.
December 6, 2012

INTRODUCTION TO COMPUTERS
control a pointer on the screen
December 6, 2012

Chemistry
Which ion has larger radius O2- or F 1-?why?
December 5, 2012

Math
You pick two cards from a deck of 52 cards. Find the probability that the first card was a spade given that the second card was a spade.
December 5, 2012

chemistry
what is evidence of exothermic rection?
November 19, 2012

trigonometry
Been trying this forever so it says: Simplify 1+sin2x+cos2x/1+sin2x-cos2x ive tried this problem so many times I need help with it...
November 19, 2012

Chemistry
Fool's gold is not gold at all but only lead IV sulfide. If you have 751.0 grams of lead how many grams of fool's gold can you make? Ans: Pb+2S->PbS2 Given * (1/amu of given) * (mol of find/mol of given) * (amu of find/1mol)
November 18, 2012

movement and music
Two important factors to consider when making a music selection are variety and a. quantity b. quality c. mood d. rhythm
November 18, 2012

chemistry
the specific heat capacity of iron metal is 0.450 j/gk. how many joules of energy are needed to warm 1.31 g of iron from 20.00 C to 29.00 C?
November 8, 2012

ap chemistry
A 2.5 g of sample megnesium carbide is added to 8.8 ml of water inside calorimeter of 700 ml of water how do we find limiting reactant
November 6, 2012

physics
ok. thank u
November 1, 2012

physics
but it is in hertz
November 1, 2012

physics
find energy of a single photon of light when you have 5.4*10^12 hertz.
November 1, 2012

algebra
the time it takes you to get to campus varies inveresly as your driving rate. Driving at a rate of 40 miles per hour, it takes 1.5 hours. How ong would the trip take you driving at a rate of 60 miles per hour?
November 1, 2012

algebra 1
a number decreased by -4 is at least 9
October 31, 2012

Physical science
Which is not an example of acceleration? a) A person jogging at 3m/s along a winding path b) A car stopped at stop sign c) A cheetah running 27m/s east d) A plane taking off
October 29, 2012

chem (measurements & dimensional analysis)
the density of regular gasoline is 0.9854 g/cm3. What is the density in lbs/gal
October 29, 2012

Anthropology
Caste systems are most common in societies: (Points : 1) that were previously ranked. that have a tradition of slavery. that have a great deal of occupational specialization. that have monetary systems.
October 28, 2012

General Chemistry
Hospital X-ray generators emit X rays with wavelength of about 15.0 nanometers (nm), where 1 nm=10-9m. What is the energy of a photon in an X ray?
October 25, 2012

math
how do i calculate these ratios 5,474 to 1,850 but the total is 7,324 do i need to do anything with the total or is it right??????
October 24, 2012

Math
I got it! I love this site already!
October 24, 2012

Math
How long will it take a car traveling 65 mph to pass a car traveling 45 mph if the slower car had a 2 hour lead?
October 24, 2012

Chemistry
a compound decomposes with half life of 8seconds and is independent of concentration.how much time is consumed to convert the concentration of one sixteenth of its initial concentration?
October 23, 2012

Math
A fire hose has a circular cross-section which has a diameter of 20 cm. The hose is full of water and the water in the hose is flowing at a speed of 5m/s. How many liters of water can flow from the hose in 1 minute? (1m^3 = 1000 L)
October 23, 2012

Cultural Anthropology
The difference between transhumance and nomadic pastoralism is: (Points : 1) in transhumance people grow food and in nomadic pastoralism any domesticated plant food is acquired through trade. different types of animals are herded. in transhumance women do the dairying and in ...
October 21, 2012

Thank you
Thank you can you tell me why no one can help with my real question about ratios. I have submitted it twice now, it really has me confused and I don't know what to do. Please help me
October 18, 2012

Math
I think maybe this is a hoax, I listed same problem that I am having twice and no one can answer it? It is in my eitgth grade class. Let's see if this is for real what is 2+2?
October 18, 2012

Science math
Can no one help me? I posted a question earlier I don't need answer I need to understand what I did wrong my thinking is that if I have a 2:1 ratio And my total is 99 that if I divide by 3 then I can get the amounts 33x2 is 66, then 33x1 is 33 so it would be 66:33. I used ...
October 18, 2012

Science-math
The equation for the decomposition of silver oxide is 2(Ag2)o yields 4Ag +o2. Set up ratio to calculate the number of oxygen molecules released when 1 gram of silver oxide is broken down. There are 2.6 x 10 to 21 power molecules in 1 gram of silver oxide. I know that it is a 2...
October 18, 2012

History
Compare the Iroquois form of government to that of the United State?
October 17, 2012

health
Resistance exercises improve muscular strength in person with such condition as A-Multiple sclerosis B- Cerebal palsy and spinal cord injuries C-Cognitive disability D-All above
October 17, 2012

chemistry ............chemistry
if you had to design a firework show for a Christmas celebration , what elements would you include in the fireworks ? why ? I knew u post answer for me , but i can't find it . May you answer for me? Thank you so much !!
October 15, 2012

chemistry ......chemistry
what does Planck mean when he states that energy in quantized? Ans: plank's theory proposes that the energies absorbed or emitted by atoms are quantized ,which means that their values are restricted to certain quantities. is this O.K?
October 15, 2012

chemistry ........................chemistry
thank you
October 15, 2012

chemistry ........................chemistry
Sodium Na+ Intense yellow Barium Ba++ Green Calcium Ca++ Brick red Copper Cu+ or Cu++ Blue-green Strontium Sr++ ? Lithium Li+ ? Sodium and potassium mixture Na+&K :yellow light Observations using the cobalt glass filter Sodium & potassium mixture Na+&K+:reddish color Potassium...
October 15, 2012

social studies
when many native americans died from a disease called smallpox?
October 14, 2012

chemistry ................chemistry
yes , i did . but i don't sure . thank you
October 14, 2012

chemistry ................chemistry
what is the color a mixture of sodium and potassium compounds?? What is the color a mixture of sodium and potassium compounds (use the cobalt glass)??
October 14, 2012

physical sicence
If a force gives a 2-kg object an acceleration of 1.6 m/s2, what acceleration does this same force give to an 8-kg object?
October 12, 2012

chemistry .............chemistry
what color emission would you see if you heated each solution to an extremely high temperature? why
October 12, 2012

chemistry.......chemistry
what color did your glass-stirring rod emit ? what does this indicate about your glass-stirring rod?
October 12, 2012

physics
If a force gives a 2-kg object an acceleration of 1.6 m/s2, what acceleration does this same force give to an 8-kg object?
October 12, 2012

chemistry .....chemistry
what element include in the fireworks power ? why
October 11, 2012

chemistry -------------chemistry
If a flame on the candle burns red , how does energy of that flame compare to that of the Bunsen burner flame ? and why ? ans:The Bunsen burner flame has higher temperature than candle’s flame . Because flame of candle emit red ,and red has the least energy in visible light.
October 11, 2012

chemistry ---------chemistry
What color did your glass -stirring rod emid ? what does this indicate about glass- strirring rod ? Ans: galss stirring rod emids orange . but i dont know the ans 2 .
October 11, 2012

chemistry ------------ chemistry -------
when you were heating milk on the stoven you accidentally spilled some milk on the burner . what color would you see ? why would you see that color? My answer : Intense yellow . because milk has sodium , sodium is intense yellow . is this right ?
October 11, 2012

chemistry ------ flame test-------------
thanks for your help
October 11, 2012

chemistry ------ flame test-------------
Did the nitrate ion effect the color emission of the solution ? how did you decide ? my answer: No , because The nitrate ion is the oxidizing agent in the compound without it you could not burn the chemicals and you could not produce a spectrum so there would be no emission ...
October 11, 2012

Maria
All of them
October 9, 2012

Science
Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 15.2 g of biphenyl in 29.5 g of benzene?
October 9, 2012

Computer studies
Draw a flowchart for a program that will accepts 30 intergers and print the number of positive and negatives numbers and the sum of the positive number
October 7, 2012

physics
A spring has a length of 60cm when it unstretched. A load of 10N increases its length to 64 cm and a load of 20N increases its length to 68cm a)what extension is produced by the 20N load? b) What length would the spring have if a load of 15N were added to it? c) Determine the ...
October 5, 2012

history
One of today's hot political topics is some states' measures to restrict voting. What historical precedents do we have for such efforts, in the South and elsewhere? Why were/are some people concerned about this?
October 4, 2012

physical science
A Weather balloon carries instruments that measure temperature, pressure, and humidity as it rises through the atmosphere. Suppose such a balloon has a volume of 1.2 m3 at sea level where the pressure is 1 atm and the temperature is 20oC. When the balloon is at an altitude of ...
October 4, 2012

Physics
A loaded truck can accelerate at 4 m/s 2. It loses its load so that it is only 0.1 as massive. By what factor must the acceleration change for the same driving force?
October 1, 2012

Algebra 2
x=4? y=100? Is That Right?
October 1, 2012

Algebra 2
Explain what the notation f(4)=100 means? We could also say that when x=___, y=___?
October 1, 2012

Physics
A loaded truck can accelerate at 4 m/s 2. It loses its load so that it is only 0.1 as massive. By what factor must the acceleration change for the same driving force?
October 1, 2012

Physics
A loaded truck can accelerate at 4 m/s 2. It loses its load so that it is only 0.1 as massive. By what factor must the acceleration change for the same driving force?
October 1, 2012

chemistry ----------- chemistry
on the atomic level , how are physical changes and chemical changes different ?
October 1, 2012

Art
Idk because i feel like modern art in the 20th century, is realistic, with the nude statues, and paintings, and things looking like a photograph nowadays. U know what im saying?
September 30, 2012

Art
ok so for the first question on how art will change in the future, i said it will be more.. realistic. Do u think thats a good answer?
September 30, 2012

Art
can you help, what is this question answering? It says, based on the examples you have seen from the various time periods in history, try to uncover any trends and deduce the direction art style is heading.
September 30, 2012

Art
Where are art styles going to lead in the near future
September 30, 2012

childcare
Discuss the responsibilities that a teacher has to volunteer parents when these parents are invited to particpate in learning activities. Include five responsibilties and an examplae of each
September 29, 2012

physics
If a person who weighs 125lb, rides a roller coaster with a 100m diameter loop at 30m/s. What force did the person exert?
September 27, 2012

physics
A glacier moves with a speed of 45 nm/s. How many years would it take for the glacier to move 0.87 km? Assume there are 365 days in a year. Answer in units of y
September 27, 2012

Art
Yeah i keep reading and i see that when he went to Rome to study the ruins, that's what inspired his own unique style.
September 27, 2012

Art
It just says to name what style he used. Its not very discriptive. And im not sure if i have to put one set style.. or multiple.. Because i think he used Gothic and classical styles in his works.. but I know he also assisted in the creation of the Renaissance style.
September 27, 2012

Art
Im seeing different things, i also read Roman or Classical style
September 27, 2012

Art
geometric style?
September 27, 2012

Art
What was Filippo Brunelleschi's style that he used? Is it.. Italian Renaissance? Thank you.
September 27, 2012

Geo
what has been the most significant event that happen in the world?
September 26, 2012

chemitry--- physical & chemical change---
describe a physical change that appears to change chemically???
September 25, 2012

Pre-Ap Physics
To win the game, a place kicker must kick a football from a point 17 m (18.5912 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 15 m/s at an angle of 58.9 ◦ from the horizontal. The ...
September 24, 2012

Pre-Ap Physics
To win the game, a place kicker must kick a football from a point 17 m (18.5912 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 15 m/s at an angle of 58.9◦ from the horizontal. The ...
September 24, 2012

Pre-Ap Physics
A rock is projected from the edge of the top of a building with an initial velocity of 16.3 m/s at an angle of 39 ◦ above the horizontal. The rock strikes the ground a horizontal distance of 90 m from the base of the building. The acceleration of gravity is 9.8 m/s 2. ...
September 24, 2012

Pre-Ap Physics
During World War I, the Germans had a gun called Big Bertha that was used to shell Paris. The shell had an initial speed of 2.65 km/s at an initial inclination of 41.9◦ to the horizontal. The acceleration of gravity is 9.8 m/s 2 . How far away did the shell hit? Answer ...
September 24, 2012

Pre-Ap Physics
To win the game, a place kicker must kick a football from a point 17 m (18.5912 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 15 m/s at an angle of 58.9 ◦ from the horizontal. The ...
September 24, 2012

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