Wednesday
January 18, 2017

# Posts by katrina

Total # Posts: 266

science
November 6, 2008

algebra
October 7, 2008

algebra
Thanks!
October 5, 2008

algebra
Then what do I do next?
October 5, 2008

algebra
Can you help me figure out this? 7+3x=5x+13
October 5, 2008

Algabra
208 times 50
October 3, 2008

photosynthesis and cellular respiration
Explain in what way ATP and ATD can be likened to a rechargeable battery
September 11, 2008

Chemistry
SO3 can be produced in the following two-step process: FeS2 + O2 ---> Fe2O3 + SO2 S02 + O2 ----> SO3 Assuming that all the FeS2 reacts, how many grams of SO3 are produced when 20.0 g of the FeS2 reacts with 16.0 g of O2?
June 30, 2008

Chemistry
How would you approach a question like There are 6.02x 10 to the power of 23 atoms in one mol of atoms, how many atoms are there in 5.5 mol of atoms?
February 5, 2008

Organic Chemistry
How do I draw the condensed formula for: 1. 2,3-dimethyl-2-butene 2. 4-ethyl-2-hexyne 3. 3,3,6-trimathylnonane 4. 3-ethyl-4-propylheptane 5. 3-octanol
September 30, 2007

Prairie View A&M University
Given that people with borderline personality disorder are impulsive, we would expect them to do poorly on tests that measure functioning of the____. Psychology question here. Personality disorders (PD) are a group of psychiatric conditions characterized by experience and ...
July 7, 2007

math
In the formula s=ut+1/2at square.Make a the subject of formula (b)find the values ot t when s=42,u=2 and a=8.Am getting difficulties in that number.
June 20, 2007

math
given that y-1/x +2=1/3 and y+3/3x-1 =5/2 find x and y.am not getting the right answer it should be 1,2. (y-1)/(x +2) = 1/3. Change to y - 1 = x/3 + 2/3 (y + 3)/(3x -1) = 5/2 Change to y + 3 = 15x/2 -5/2 4 = 45 x/6 - 2x/6 -15/6 -4/6 43x/6 = 43/6 x = 1 y -1 = 1/3 + 2/3 = 1 y=2
June 20, 2007

math
sorry its 5t+(6 times 10 power neg.3)....and the answer should be1.08 times 10 power -2) solve thi equation ;5t(6 multiply 10 powerneg 3)=(6 multiply 10 power negative 2).am not getting the right answer;it should be 91.08 multiply 10 power negative 2)
June 20, 2007

mATHS
TA and TB are tangents and 0 is the centre.Angle CAD =x,find in terms of x(i)angle OBA(ii)angle CPB.
June 6, 2007

Chemistry
Hello Jiskha, I'm hoping you are able to help me with my homework. Its on General Chemistry. Question One - When the solid NH4NO3 is dissolved in water at 25 C, the temperature of the solution decreases. What is true about the signs of enthalpy (H) and (S) for this process...
May 9, 2007

A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree incline from the ...
February 21, 2007

music
A wind instrument, such as a bassoon, clarinet, flute, oboe, or saxophone, in which sound is produced by the vibration of reeds in or by the passing of air across the mouthpiece.
February 21, 2007

physics HELP!!
3. A rocket car is traveling on a linear horizontal frictionless track when it suddenly runs out of fuel. The car has achieved a speed of 100 meters per second at the very moment the fuel is completely spent. The track then suddenly changes to a 30-degree incline from the ...
February 20, 2007

PHYSICS helppppp
A 0.2 kilogram baseball is thrown vertically downwards towards to the same horizontal floor. The baseball possesses an initial velocity of 30 meters per second. The height is 10.00m. (A) Calculate the POTENTIAL GRAVITATIONAL ENERGY and KINETIC ENERGY of the baseball at the ...
February 19, 2007

MATH!!!!ASAP!!!
I'm confused with transitive property, substitution postulate, addition postulate, and subtraction postulate. What are they? and What are the differences between them? go to goole i mean google http://library.thinkquest.org/2647/algebra/post.htm fcpaljbk dzebx ntlehufs ...
February 12, 2007

THE ANNSWER IS UP IN THE AIR YOU USE THE I TWICE
January 21, 2007

COMBINATION!!MATH!!!hurryyy!!!
Cards are drawn at random from a 52-card deck. Find the number of different 5-card poker hands possible consisting of 3 aces and 2 kings? i don't knw how to do this kind of problems..can anyone teach me??? Forget about the fact that there are 52 cards in a deck. The number...
January 5, 2007

MATH!!!!ASAP!!!
How can i graph this equation by plug in numbers???? x^2-y^2=9 HELP PLZ!!!!!!THX ALOT!!!! Assign numbers to x and solve for y then put them in a graph: let's say x is -3 Then 9=y^2+9 y^2=0 y=0 Ok now x= -4 16=y^2+9 y^2=5 y=2.236 Also you can assign y a number and solve for...
December 14, 2006

physics
i don't understand the projectile motion...my teacher said...it's a motion of a body confined to a vertical plane, perpendicular to Earth's surface... I don't get it, can anyone explain to me clearly???? plzzzzz....THX!!!! If your teacher said that, she was ...
November 29, 2006

global history
Why can it be a unifying and diving force at the same time? What is "it"? hmm..i mean..Why can NATIONALISM be a unifying and diving force at the same time? How was the Industrial Revolution a moving force to Imperialism?
November 28, 2006

SENTENCE STRUCTURE
"The data indicate that 40 percent of the land that Israel plans to keep in any future deal with the Palestinians is private." Which kind of sentences is it?simple?complex?compound?complex compound? How can I define the part of speechs of each word in this sentence? ...
November 22, 2006

PHYSICS helppppp
a horizontal wire is stretched between two vertical poles. when a 12.0-N weight is suspended at its center, the wire sags until the angle between its halves is 110 degrees. what are the forces exerted by each half of the wire in supporting the weight? i don't really get ...
November 12, 2006

physics
a horizontal wire is stretched between two vertical poles. when a 12.0-N weight is suspended at its center, the wire sags until the angle between its halves is 110 degrees. what are the forces exerted by each half of the wire in supporting the weight? i don't really get ...
November 12, 2006

PHYSICS
a 60 km/h wind is blowing in a direction 30 degrees north of east. a. what is the component of the velocity oriented to the east? b. what is the component of the velocity oriented to the north? The component east is 60cos30. For both a and b, draw a diagram with a horizontal ...
November 11, 2006

factoring
if the length of one side of a square is 1/2h, find the representation of the area. If a side of a square is s, the area is s squared. area of square is (length of side)^2. Substitute 1/2h for (length of side) and go from there.
November 8, 2006

ethnics help
i what to know According Pyne, how have post-9-11 government responses affected prejudice and discrimination against Muslims, Arabs, and related groups? List two to three characteristics of Orientalism. How may Orientalism and prejudice contribute to hate crimes against these ...
November 2, 2006

PHYSICS!!!
how can i plot a v-t graph for this data and also account for the results and sources of error:if a ball starts from rest, and rolls down a .56m trackway, its final velocity is 1.10m/s, and the acceleration is 1.08m/s^2? HELP!!!!!!!im lost in it!!!!! The initial v was zero. ...
November 1, 2006

PHYSICS!!!
if the same ball rolls down from three different length trackways with a 20degrees elevation, its acceleration on the short-length trackway is 1.08m/s^2;its acceleration on the medium-length trackway is 1.79m/s^2;and its acceleration on the long-length trackway is 1.52m/s^2. ...
November 1, 2006

physics
extrapolation is the process whereby we extend an established numerical relationship between two variables beyond the limits of our observed and recorded data. why extrapolation would not be useful and wise to use in force-elongation graph? In force-elongation, as one ...
October 30, 2006

physics
the cables of a suspension bridge as well as the elements of many man-made structures are designed to behave elastically. can anyone briefly explain to me why it is absolutely necessary that such elements function elastically? Bridges and other man-made structures are subject ...
October 29, 2006

physics
the cables of a suspension bridge as well as the elements of many man-made structures are designed to behave elastically. whey it is absolutely necessary that such elements function elastically? When loaded past their elastic limit, and the loads are repetitive, there is ...
October 28, 2006

physics
extrapolation is the process whereby we extend an established numerical relationship between two variables beyong the elastic limit, why extrapolation would not be usedful in this particular situation? What "particular situation" are you talking about? Inelastic ...
October 25, 2006

physics
what is the meaning and significance of the elastic limit and why it should be avoided? The elastic limit is the maximum deformation a material can go to, after that, structural changes occur, and it yields as if it were a plastic. Many structural failures occur after the ...
October 25, 2006

History-Genocide
when is the actual year that "the risk assessment of genocide and politicide" adoptted? (Broken Link Removed) 1998 the US government officially started to use the model.
October 16, 2006

History-Armenian Genocide
why is the Armenian genocide significant? can the international community prevent future genocide from happening? This site gives some excellent information. http://www.armenian-genocide.org/genocidefaq.html To consider the second part of the question, you might look at the ...
October 14, 2006

physics
i'm confused with this problem..can anyone explain it to me? what should a graph of mass versus volume resemble if we were to plot the respective mass and volume values for each body as points in a Cartesian coordinate field and connect each point with a straight line to ...
October 2, 2006

Physics
what is the general relationship between the density of solids and the density of liquids? Are you talking about the density of substance X in the solid state vs the density of the same substance in the liquid state. GENERALLY, solids have a higher density than the ...
October 1, 2006

Metaphor
i don't knw how to transform these two similes into metaphor...can anyone teach me?? 1. As you look far into the distance, the long wickers, "which fly in the air, like the fairy¡¯s hair."<---only the transform the quote part 2. The fascicles of ...
September 29, 2006

biology
list two reasons why DDT should not be used... Doesn't it cause human birth defects? And stay in the environment a long time? And cause bird eggs to be too thin to hatch successfully?
September 24, 2006

MATH
can we sketch a triangle with 1:2:3 side-length ratio???? Intuitively, no. Think about the angles of the triangle. If the sum of two sides is equal to the length of the last side, then the "triangle" is a straight line. But the question is, when i draw it with ...
September 24, 2006

PHYSICS
what's the differencces between the meaning of measurement and value of measurement in physics??? The meaning of measurement is a definition of whatever is being measured. I suggest you use a dictionary for that. The answer will depend upon what you are measuring (mass, ...
September 23, 2006

PHYSICS helppppp
what is the value of measurement?????? What is the value of measurement? I hope I am understanding your question. If one wants to know the number of teeth in a horses' mouth, counting is quite valuable.
September 23, 2006

PHYSICS
can we ever measure or draw any physical feature of a natural system exactly???why or why not?? im confused by this><!!! HELP PLZZ.... i will try to help u but i am no expert only a student.this might be one of those ethic questions that really have no answer at all you ...
September 23, 2006

global history
can anyone plz give me three major reasons of why did the Industrial Revolution begin in England??? Check this site. http://en.wikipedia.org/wiki/Industrial_Revolution#Causes_for_occurrence_in_Britain
September 22, 2006

types of sentence
can anyone tell me which of the following is a complex sentence??? 1.But the journey of the coal driver is a reminder that often beneath the juggernaut of the Chinese economy are three guys squeezed into the cab of a filthy truck hauling coal, a trip multiplied daily by untold...
September 20, 2006

math
express this in binomial: 2 4ez (4e-z) the 2 is the square.. can anyone teach me how to do this??? I'm a little unsure what your question is asking for here. Ordinarily, a binomial is an expression with two variables and some positive power, e.g. (x+y)^2 or (x+y)^3 are ...
September 20, 2006

Physics
when we do convertions, do we have follow the rules for rounding? is it 118.5cm=1.19m, or 118.5cm=1.18m? It depends upon how many significant figures (sf) you are allowed, whether you are doing converSions or calculating some other problem. By definition, there are 100....
September 17, 2006

physics
when i calculate the density from my measurement,mass=154.4, volume=175.00,and got 0.8823 g/cmexp3 as the answer,so do i have to express the answer in scientific notation or round off it? No, you do not need to express the answer in scientific notation unless the problem asks ...
September 17, 2006

Physics Measurement
Upon what is the precision of a measurement based? It depends upon what is being measured. For volume, the precision depends upon how precisely the buret or graduated cylinder can be read. For mass it depends upon the balance used (triple beam vs analytical balance), its ...
September 15, 2006

Physics Mathematics
do we have to have the same amount of significant numbers in the values we got by convertion? No. Your conversion factors may have some lack of precision. Examples 60sec=1min infinitely precise, a definition. 1.6km= 1mile two sig figures, because the mile to km is a measured ...
September 15, 2006

HELP!!!!EMERGENCY WITH THE POEM!!!
do anyone knows a poem named "Instruction for Joining a New Society", which about the desire to become an American? I need this poem immediately!!! Thank you for using the Jiskha Homework Help Forum. If that is the title, I find nothing! If you have either the title ...
September 14, 2006

Look for poem
can anyoone help me to find these two poems... 1.AmeR¨ªcan 2.Instruction for Joining a New Society Do you know the authors? I looked on google but found nothing.
September 14, 2006

trigonometric functions
im compeletely lost with the trigonometric functions...can anyone explain clearly to me? Are you lost on the definitions?...where is the problem. You need to be able to draw and label all the parts of a triangle, the hypotenuse and legs. Then be able to define sine, cosine, ...
September 14, 2006

ESL-grammar
can anyone plz tell me what's the differences between past perfect tense and past perfect continuous tense?and tell me few examples of each one? Thank you for using the Jiskha Homework Help Forum. The past perfect tense is to show that something "had happened" ...
September 13, 2006

Look for poem
I'm looking for a poem, "Ending Poem", which is written by a Puerto Rican poet. i can't find this poem,anyone can help me plzzzzzzzzzzzz? This stupid site won't let me post the link so hers the poem enjoy! I am what I am. A child of the Americas. A light-...
September 13, 2006

English
Mother to Son by Langston Hughes Well, son, I'll tell you: Life for me ain't been no crystal stair. It's had tacks in it, And splinters, And boards torn up, And places with no carpet on the floor-- Bare. But all the time I'se been a-climbin' on. And reachin...
September 11, 2006

Home Economics
chef sewer and a gardener
September 8, 2006

sociology
I started this class last week and is so confused on what they are asking. The same question. How do sologlgist measure prejustic. Thanks for the help.
July 20, 2006

chem help!!!
What are some uses of ketones? solvents.. Solvents, plastic cements, varnishes
June 22, 2006

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