Friday
September 19, 2014

Posts by Lydia


Total # Posts: 164

Physical science
What do you call the phenomenon that causes dispersion of white light when it passes through a triangular prism
October 9, 2010

Physical science
What do you call the phenomenon that causes dispersion of white light when it passes through a triangular prism
October 9, 2010

pharmacy
importance of uniformity of weight test in pharmacy
September 11, 2010

biology
Can someone please help me with this question? Thanks! What organic molecules make up the structure that surrounds the DNA molecule?
May 2, 2010

math
Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.
April 12, 2010

math
Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.
April 12, 2010

Trignometry
An isosceles triangle has two sides of length w that make a 2á-degree angle. Write down two different formulas for the area of this triangle, in terms of w and á (Greek “alpha”). By equating the formulas, discover a relation involving sin 2á, sin...
April 12, 2010

4th grade
I guess it would be 7 feet on each side. THANKS JOE!!!!!!!!!!!:D
April 5, 2010

geography
Would Ireland be considered a developed country? How wealthy is it in comparison to other countries? Thanks!
January 19, 2010

history
Is it true that during the McCarthy era that if accused communists gave names of other communists then they would be let off the hook? Like, how did it work when McCarthy asked people for names? Thanks!!!
December 13, 2009

Physics
A string has a linear density of 6.7 x 10-3 kg/m and is under a tension of 210 N. The string is 1.6 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c) frequency of the traveling ...
November 30, 2009

Physics
The transverse standing wave on a string fixed at both ends is vibrating at its fundamental frequency of 250 Hz. What would be the fundamental frequency on a piece of the same string that is twice as long and has four times the tension? I know the equation f=v/2L. and that v=(...
November 30, 2009

math
A tie pin which sells for $200.00 has a markup rate of 30% on the selling price. Find the amount of the markup and the cost.
November 19, 2009

Mathematics
For the first 1 1/2 hours of a 91km journey the average speed was 30km/h.If the average speed for the reminder of the journey was 23km/h, calculate the average speed for the entire journey.
July 20, 2009

Chemistry
so is it 3 x 8.314 x (16°C + 273)K / (146.065 molecules / 6.02e23) = 2.970841253e25 ? is that right?
May 17, 2009

Chemistry
thanks
May 17, 2009

Chemistry
I have no clue as to how this problem should be solved... could i have some help please? Calculate the rms speed of SF6 molecules at 16°C
May 17, 2009

physics
At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at rest, slides without friction, and decends through a vertical height of 2.40 m, what is her speed at the bottom of the slide?
November 24, 2008

social studies
whats the difference between indentured and enslaved labor?
September 1, 2008

politics
What is the difference between nationalism and federalism? Thanks!
May 16, 2008

AED
The first 1980's school technology event and date .
May 12, 2008

english/science
Einstein was offered the presidency of Israel after Chaim Weizmann's death. He declined the position.
May 12, 2008

science
What exactly is a tax incentive?
May 12, 2008

science
Describe 2 ways government could promote the use of photovoltaic power systems for homeowners. Thanks!
May 12, 2008

5TH GRADE MATH NEED HELP ASAP
metric homework: 30m = 6000 i have converted to cm, in and feet, none get me to 6000 help
April 22, 2008

Literature (short story)
c c-
April 18, 2008

physics
At a picnic, a Styrofoam cup contains lemonade and ice at 0 degree C. The thickness of the cup is 2.0*10^-3m, and the area is 0.016 m^2. The temperature at the outside surface of the cup is 35 degree C. The latent heat of fusion for ice is 3.35*10^5 J/kg. What mass of ice ...
February 21, 2008

PHYSICS!!!HELP!!
I don't really get the last part...so that times 3600 = Joules gained to melt ice in one hour. Now kg melted = Joules gained/ heat of fusion in Joules/ kilogram Please explain.
February 21, 2008

PHYSICS!!!HELP!!
At a picnic, a Styrofoam cup contains lemonade and ice at 0 degree C. The thickness of the cup is 2.0*10^-3m, and the area is 0.016 m^2. The temperature at the outside surface of the cup is 35 degree C. The latent heat of fusion for ice is 3.35*1065 J/kg. What mass of ice ...
February 21, 2008

math
I don't understand how to write the formulas for unit analysis. I can do the problems, but the explanation of the formulas in my book doesn't make sense with the problems I am doing. For instance, this one: Find the unit rate: $2 for 5 cans of vegetables. I know it is...
December 4, 2007

government
oh, but can't you call communism government?
October 21, 2007

government
Hello there. I was wondering if someone could please tell me whether or not you could call a government totalitarian and communism? We're studying Sparta (from ancient Greece) and our teacher said it was totalitarian and later she said it was communist-like. Am I allowed ...
October 21, 2007

precalculus
State the domain and range of the function. y=the cubed root of (x-2) Thanks SO much!
October 10, 2007

psychology
Thank you so much!!!!!!
September 18, 2007

psychology
I know what the definitions are, but there is so much going on in the problem that I've gotten confused- dv- a person's frustration and aggression?, iv-socioeconomic status? experimental group- the two types of cars? no control group?
September 18, 2007

psychology
what would the dependent and independent variable and control and experimental group be in this problem: John is intrigued by the relationship between frustration and aggression. He proposes to study whether socioeconomic status is a factor in how drivers express their ...
September 18, 2007

english
Do you underline, put in italics, or quote article titles from magazines?
September 15, 2007

math
Please help. Name all values of x that are not in the domain of the given function. f(x)=x-10/(sqrt x^2-16)
September 10, 2007

pre-calculus
Can someone help me with this question please? A linear function may have zero, one, or infinitely many zeros. Illustarte all three of these situations. Thank you!
September 9, 2007

math
Please can someone help? 3/(x-7) + x^2+5x My answer is: x^3-2x^2-35x+3/(x-7) Is this right? I converted x^2+5x so that it had a common denominator of x-7 so I could add them.
September 6, 2007

Early Child Ed.
Would you make sure I have chosen the best answer to these two questions? 1. Teacher observation is one of the best methods of assessment since: A. there are no standardized tests for young children. B. the type and number of language arts skills assessed can be determined by ...
September 5, 2007

Early Child Ed.
Which one would be the best answer? Would (A) be the best answer? The opposite of a traditional language program might be which: A. developmentally appropriate practice B. conventional program C. back-to-basics program D. teacher-directed program
September 5, 2007

algebra
Can someone please help me with these problems? Please and thank you. 1)Solve the equation: (1/x)+[x/(x+2)]=1 2)Simplify the complex fraction: 3-(3/4) ------- (1/2)-(1/4) (1/x)+ [x/(x+2)] = 1 Convert left side to the sum of fractional terms with common denominators. [(x+2) + x...
May 13, 2007

algebra
How do you simplify [2/(x+4)]+2 ----------- [3/(x+4)]+1 I know the answer is 2(x+5)/(x+7), but I have little idea how to get there! Please help?! multiply your fraction by (x+4)/(x+4) you end up with [2 + 2(x+4)]/[3 + (x+4)] simplify and you will get your answer. oooooooh thanks!
May 9, 2007

math
Please help: A continuously compounded account starts with $2500 in principal. The annual interest rate is 11.3%. What is the balance after 15 years? pert: Value= Principal*ert = 2500* e0.11(15) = 2500 * e1.65 wow. thanks
April 22, 2007

chemistry
Please help me with this one. You are trying to dissolve oxygen in water. Will you be successful? Explain your answer.
April 19, 2007

chemistry
Why if you dissolve cobalt chloride solution in distilled water and then pour acetone in it, the bottom part of the graduated cylinder is red and the top part is blue? What do you mean by it has one color with water of crystallization? CoCl2*6H2O is a purple solid. I'm ...
April 11, 2007

chem
How does molar mass affect the boiling point of covalent substances? The general rule is that heavier molecules boil at a higher temperature. thanks
April 9, 2007

algebra
What is the difference between y=sqrtx +3 and y=2sqrtx +3 (I put spaces between x and the + to show that only the x is a squareroot) And what is the difference between y=2sqrtx +3 and y=sqrt2x+3 When I mean the difference, I mean how they would look differently when graphed. ...
March 26, 2007

chem
In Fe(NO3)3, how many Fe atoms are there? One, three N, and 9 O. thank you
March 15, 2007

algebra
Can someone please help me with this problem? 4x-1 ---- 2x^2+3 Can you simplify this any further? no, its done thanks
March 15, 2007

algebra
Can someone please help me with this one? Solve (5x+4)^1/2-3x=0 Just so you know, it is to the 1/2 power. Add 3x to both sides of the equation, then square both sides. That should enable you to gather terms and factor. Yeah, that's the part I understood. Could you help me ...
March 10, 2007

chemistry
Can someone help me finish this equation, please? We're adding Magnesium to Copper sulfate and getting Copper. This is what I have as of now: CuSO4+Mg===>Cu I'm guessing it is a single replacement, so should I add MgSO4 to the right? But then my lab procedure says ...
March 8, 2007

chem
oh thanks If you have CH4, does the 4 apply to both the C and H or only to the H? It is the H that is four. only the H
February 28, 2007

Math-- Please Check
1.Would fraction notation for 38% be 19/50 ? 2.Would percent notation for 0.382 be 38.2% 3.Would percent notation for 2/3 be 66.6 (with 6 keep repeating)? Yes, yes, yes
February 26, 2007

chemistry
How do you balance this equation? C6H12O6 + O2 --> H2O + CO2 Thanks! C6H12O6+6O2=6H2O+6CO2 (that should be right!) C6H12O6 + 6O2 --> 6H2O + 6CO2 Thank you! Thank you too!
February 24, 2007

chemistry
Can you help me with these please? In general, is the boiling point of a polar liquid likely to be higher or lower than that of a nonpolar liquid of about the same mass? What, if any, is the correlation between electronegatively and reactivity? Thanks in advance. The polar ...
February 4, 2007

gregg elementary
what is intervles on a numberline
January 30, 2007

shuttle run
what would be a suitable wa up plan before i do the shuttle run Huh? I have no idea what you asked Ahhh. I figured it out. Warm up plan. http://www.cmcrossroads.com/bradapp/docs/rec/stretching/stretching_5.html#SEC40
October 25, 2006

history
Please, can someone tell me what this quote means? "What kills a skunk is the publicity it gives itself." -Abraham Lincoln Lowlifes often broadcast their crimes and evil, often with their own mouths. This greatly helps police in criminal matters. Thanks much!! Do you...
October 21, 2006

ENGLISH
WHICH IS THE CORRECT SENTENCE? STAY TUNE FOR MORE IN INFORMATION. OR STAY TUNED FOR MORE INFORMATION. The second sentence is correct. Stay = command verb (understood subject) tuned = past participle used as an adjective -- predicate adjective. =)
October 10, 2006

physical education
which joints are involved the seated row Since this is not my area of expertise, I searched Google under the key words "rowing joints" to get these possible sources: http://www.hemophiliagalaxy.com/patients/living/sports/categories/cat2.html http://www.healthatoz.com...
October 8, 2006

sport physiology
which jopints are involved the seated row
October 8, 2006

history
Hi, ummm, can someone please help me with this question? What are some reasons that the victory of the management in the Homestead Strike was positive for American society? And negative? Thank you! I'm not much of a history person, but I think this might help a bit: "...
October 7, 2006

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