Saturday
October 25, 2014

Posts by Rachel


Total # Posts: 1,208

physics
Thank you very much sir!
March 11, 2011

physics
A system consists of three particles, each of mass 2.10 g, located at the corners of an equilateral triangle with sides of 22.0 cm. Calculate the potential energy of the system. Please help me what formula to use please
March 11, 2011

physics
What is the minimum speed, relative to the Sun, necessary for a spacecraft to escape the solar system if it starts at the Earth's orbit? Please tell me what formula
March 11, 2011

PHYSICS
At the Earth's surface, a projectile is launched straight up at a speed of 8.4 km/s. To what height will it rise? Ignore air resistance and the rotation of the Earth.
March 11, 2011

PHYSICS
How much work is done by the Moon's gravitational field as a 1005 kg meteor comes in from outer space and impacts on the Moon's surface? PLEASEEEEEEEEEE
March 10, 2011

chemistry
What mass of NaCl can be dissolved in 250 g of water at 20 degrees C?
March 10, 2011

Child Care
1. The interaction between a child's biological makeup and the environmental influences that affect his or her development and behavior is called the a) balanced systems approach b) ecological systems theory c) body in the classroom analysis d) me/them dynamic 2. Alcohol, ...
March 9, 2011

Spanish-8th Grade-Please check
I have a question about the owrd cubiertos in Spanish. Does ths word include la servillete el cuchillo el vaso la cuchara el tendor OR is it just like the plate and spoon, fork, knife and NOT the vaso or servillete(napkin)? The word and transaltion is confusing me Thank you
March 8, 2011

Genetics
Question 11 (1 point) Save As the degree of relatedness within a population increases, the level of inbreeding in that population also increases. As relatedness and inbreeding go up, individuals become more similar genetically and therefore genetic variability goes down. How ...
March 6, 2011

Stats
if a researcher were studying the effects of a teaching method on patient learning outcomes, how must he or she word the research question (different from hypothesis) to use the t-test for statistical differences? What type of data must he or she collect (interval, ratio, ...
March 5, 2011

Science
To disinegrate due to mixing with a fluid
March 4, 2011

science
two equally charged spheres, X and Y, repel each other with a force of 8.0 x 10^-6 N when placed a certain distance apart. Another identical, but uncharged, sphere is touched to sphere Y and then moved next to sphere X. Calculate the electric force acting on sphere Y.
March 4, 2011

Physics
A parallel-plate capacitor is made from two plates 12.0cm on each side and 4.50mm apart. Half of the space between these plates contains only air, but the other half is filled with Plexiglas of dielectric constant 3.40. An 18.0 V battery is connected across the plates. What is...
March 3, 2011

U.S.History- 8th grade
Could someone help me with this question? Which of the following groups of workers lived in poverty? nurses unskilled workes technicians immigrants I'm torn between unskilled workers and immigrants
March 3, 2011

Medical Office Asst
On the ADA for Keith Konklin, the number 333-2589 should be placed in block A( #7 B) # 18 C0 # 19 D) #31
March 1, 2011

English
In the poem "Home Burial", who do you think was in the right, the husband Amy? I believe Amy was in the right because, he shouldnn't have walked in the house talking about the fence, after leaving his son's grave. A fence would have been the last thing on my ...
February 28, 2011

Calculus
I'm a bit confused about the average equations with integration. I need to solve this problem, and I think I'm supposed to use substitution, but I can't get it to work. The problem looks like this: z(t)=4tsin(t^2), [0,π^1/2] Any input?
February 27, 2011

math
It is C 2 X (brother's age) + 3
February 25, 2011

Med office asst
which of the following codes should you insert in block # 217? 802.20 802.30 99204 J9293
February 25, 2011

math
Radioactive radium has a half-life of approximately 1599 years. What percent of a given amount remains after 100 years?
February 24, 2011

math
Radioactive radium has a half-life of approximately 1599 years. What percent of a given amount remains after 100 years?
February 24, 2011

Chem
how many grams of NH3 are required to completely react with 40.0 grams of NO.
February 24, 2011

AP English Language
1.) Repetition of "whatever is..." (more specifically anaphora) 2.) Rhetorical Question, drawing the audience into the "conversation"
February 23, 2011

math
What is 10-(-5)=?
February 23, 2011

Math -Ultimate challenge puzzle
where it says clyde- i meant claude
February 22, 2011

Math -Ultimate challenge puzzle
andrew, bernard, and clyde are bicicling. each one is riding the bicicle of on friend and wearing the hat of another. the one who wears claude's hat is riding bernard's bicicle. who is riding andrew's bicicle?
February 22, 2011

Medical office
what does it mean when you find a three digit code highlited in the tabular list A, Poisoning B. Accident, C. Theraputic Use D. Undetermined
February 22, 2011

medical office
what does it mean when you find a three digit code highlited in the tabular list
February 22, 2011

chemistry
How do you write a conversion factor relating cubic centimeters and milliliters?
February 20, 2011

physics
A solid copper object hangs at the bottom of a steel wire of negligible mass. The top end of the wire is fixed. When the wire is struck, it emits sound with a fundamental frequency of 300 Hz. The copper object is then submerged in water so that half its volume is below the ...
February 16, 2011

Statistics
Never mind, got it!!
February 15, 2011

Statistics
On average 3 % of a certain type of TV tube burn out before their guarantee has expired. If a merchant sells 120 such tubes, find the probability that he will be forced to replace at least 3 of them (Use the Poisson approximation to the Binomial distribution).
February 15, 2011

Vocabulary
What is the best comparison of incentive is to goad as a. pontential is to mortify b. quibble is to dishearten c. flaw is to entice d. hazard is to dissuade
February 15, 2011

Calculus
Solve the differential equation. t(dy/dt) + 2y= t^3 t>0, y(1)=0 I think I solved it properly, I'm just trying to check my final solution.
February 15, 2011

History
A prince whose character is thus marked by every act which may define a tyrant is unfit to be the ruler of a [free] people who mean to be free. Future ages will scarcely believe that the hardiness of one man adventured, within the short compass of twelve years only, to lay a ...
February 15, 2011

History
What is centralization in education and what is decentralization in education. Is there a difference. Is one better than another?
February 15, 2011

History
what is the difference of Centralization or decentralization dealing with education?
February 15, 2011

History
Did the writers of the Constitution validate the ideals of the Declaration or betray them?
February 15, 2011

History
Why has this portion been taken out of the declaration of independence "He has waged cruel war against human nature itself, violating its most sacred rights of life and liberty in the persons of a distant people who never offended him, captivating & carrying them into ...
February 15, 2011

economics
Suppose you wish to invest X dollars in a bank account which pays 5% per year. You want to use this account to pay for costs that appear each year, starting with year 15. The amount you have to pay in year 15 is 276.71 and then the payments grow at a rate of 5% per year until...
February 13, 2011

math
how do you solve the exponential equation, 12^x = 14^3x? If someone could show me step by step I would greatly appreciate it. thank you! :)
February 13, 2011

Physics
Picture the following: A square with 4 point charges. Charges Q are diagonal from eachother, and charges -Q are diagonal from eachother. The length of each side is "a". One of the -Q charges is "kicked" away with an outward initial speed of V0, while the ...
February 12, 2011

Physics
Two point charges are placed on the x axis. The charge +4q is at x=3.00 m, and the -q charge is at x=-3.00. a) There is a point on the x axis between the two charges where the electric potential is zero. Where is this point? Found it to be: -1.80m b) The electric potential ...
February 12, 2011

physics
If the ball is in equilibrium when the string makes a 25.9 ◦ angle with the vertical as indicated, what is the net charge on the ball? Answer in units of µC. i know how to do this if i had the balls mass and the electric field or some other information, but im lost...
February 10, 2011

science
What role do condensation nuclei play in condensation? (cloud flormation) I did some research and found that the condensation nuclei attract water and produce condensation so would that mean my answer would be something like 'that the condensation nuclei help to form the ...
February 8, 2011

economics
Jerry is considering buying today a new bond which makes infinite annual payments. In particular the bond pays its holder 557.3 dollars one year from the day of purchase and the annual payment increases by 129.32 dollars each year thereafter. What is the maximum amount that ...
February 6, 2011

economics
In order to have money for their daughter's college education, a young couple started a savings plan into which they made intermittent deposits. They started the account with a deposit of 128.44 dollars (in year zero) and then added 421.97 dollars in year 3, and 723.46 ...
February 5, 2011

economics
Nair Inc. bought a "growing perpetuity" bond. The bond will pay 631.85 dollars at the end of year 1 and the payment will increase by 2.5 percent each year forever thereafter. Assuming the interest rate is 11.26% (forever), what is the maximum amount that Nair Inc. ...
February 5, 2011

economics
Suppose you wish to create a scholarship fund which will pay 73.43 each year for the next 14 years. If you accomplish your task by depositing a single amount today into a bank account which pays 12.91% per year, what must the deposit amount be? (Accuracy is at the second ...
February 5, 2011

Physics
An object of mass m= 4.8g and charge Q = 49uC is attached to a string and placed in a uniform electric field that is inclined at an angle of 30.0 with the horizontal (see the figure). The object is in static equilibrium when the string is horizontal. a) find the magnitude of ...
February 3, 2011

Physics
A small m = 2.00 g plastic ball is suspended by a L = 24.0 cm long string in a uniform electric field, as shown in Figure P15.50. If the ball is in equilibrium when the string makes a 18.0° angle with the vertical as indicated, what is the net charge on the ball? The ...
February 1, 2011

Physics
A small m = 2.00 g plastic ball is suspended by a L = 24.0 cm long string in a uniform electric field, as shown in Figure P15.50. If the ball is in equilibrium when the string makes a 18.0° angle with the vertical as indicated, what is the net charge on the ball?
February 1, 2011

math
40%
January 30, 2011

Calculus
Find the area enclosed by the following functions from x=0 to x=2: y=sqrt*(x+2) y=1/(1+x) I got 2/3(8)-ln3-2/3(sqrt*8) can someone please verify this?
January 30, 2011

Math
i) The two lines 4x-6y=-5, and 7x+6y=7 intersect at the point where x= and y=? ii) If the line 7x+ky=7 is parallel to 4x-6y=-5, then what is the value of k? Answer: k = ?
January 28, 2011

Algebra 1
I'm graphing linear inequalities...it says I need to do: y<2x+4 y>5 How do I do this?
January 27, 2011

Physics
An organ pipe open at both ends has a harmonic with a frequency of 480 Hz. The next higher harmonic in the pipe has a frequency of 540 Hz. Calculate the frequency of the fundamental and the length of the pipe. I know 540/480 is 9/8. I have no idea where to go from here.
January 26, 2011

Calculus
Integrate the following: sin^3 x/cosx Have attempted numerous ways but can't get anything sensible to come out of it.
January 24, 2011

Social Studies
How did events at Chickamauga and Chattanooga affect Georgians?
January 24, 2011

math
how to find the height of a trapezoid with median 12 and area 84
January 24, 2011

Chemistry
Calculate the concentrations of S2O8 2-, I-, S2O32 2- in moles per litre of reaction mixture given the following: 20mL of 0.1 M (NH4)2S2O8 added to: 20mL of 0.2M KI 10mL of 0.01M Na2S2O3 5mL 0.2% starch Also, calculate -(delta)S2O8 2- that is, how much S2O8 2- is used up (...
January 24, 2011

Chem- Dr. Bob!
Posted by Rachel on Thursday, January 20, 2011 at 3:57pm. Does anyone know where I can get an image of the valence bond model for maleic acid? ie. showing the pi and sigma bonds and indicating the hybridization (sp2, sp3.. ) OR could someone describe these things to me? I'...
January 23, 2011

Calculus
That would be great if you could! I'm working on getting the correct indefinite as you have above, but when I get it it would be great to have something to check my definite integral with :)
January 22, 2011

Calculus
Okay, so I ended up with the expression: 1/2[4/3arctan(4(x^2+1/2)/3) Can you confirm this is correct before I use the fundamental theorem of calculus to determine the definite integral please.
January 22, 2011

Calculus
Find the integral of x/ (x^4+x^2+1) from 2 to 3. I was going to integrate using the method for partial fractions but I can't factor x^4+x^2+1.
January 22, 2011

Calculus
What is the integral of 1-tan^2theta from 0 to pi/3? Using the identity tan^2theta=sec^2theta-1, I got my answer to be 2pi/3 - sqrt*3 Can someone verify this for me please?
January 22, 2011

Chem- Dr. Bob!
Oh! Okay, I'm familiar with R groups on amino acids etc.. The question just asks me to label the hybridization for each carbon and oxygen atom. So here's what I've got: The carbon atoms bonded to eachother are sp2 hybridized atoms. The carbon atoms bonded double ...
January 22, 2011

Chem- Dr. Bob!
Posted by Rachel on Thursday, January 20, 2011 at 3:57pm. Does anyone know where I can get an image of the valence bond model for maleic acid? ie. showing the pi and sigma bonds and indicating the hybridization (sp2, sp3.. ) OR could someone describe these things to me? I'...
January 22, 2011

Chemistry
Can someone please check my work? Calculate the mass of (NH4)2S2O8 needed to prepare 250mL of a 0.100M solution. I got 5.705 g. Calculate the volume of 2.00M KI needed to prepare 250mL of a 0.200M solution. I got 0.025L or 25mL. Calculate the volume of 0.100M Na2S2O3 needed to...
January 22, 2011

Chemistry
Does anyone know where I can get an image of the valence bond model for maleic acid? ie. showing the pi and sigma bonds and indicating the hybridization (sp2, sp3.. ) OR could someone describe these things to me? I'm just trying to check my work and make sure I didn't ...
January 20, 2011

statistics
Ordinal. Data is classified into two types: qualitative (aka categorial) or quantitative. Within the qualitative types, there are ordinal (which is ordered data- common ex. is sm, md, lrg- just as in your question) or non-ordinal.
January 20, 2011

geometry
How can I prove that triangle jlm is congruent to triangle ljk if line jl is perpendicular to line lm and line lj is perpendicular to line jk and line mj is congruent to line kl
January 19, 2011

English
It was impossible for him to come. What part of speech is "impossible" in the previous sentence?
January 18, 2011

English
In the sentence "He was made clean." what part of speech is clean?
January 18, 2011

math
528
January 11, 2011

Algebra-Please help
so the answer is x = 6 according to what you're saying? and the domain is the (h) in here correct? So in the future I just look for the h , take the opposite and that is my domain?
January 8, 2011

Algebra-Please help
Where do I look for the domain in this- The domain of y =1/(x-6) + 3 Possible answers: All real numbers except x=6 All real numbers except x = -6 All real numbers except x=3 All real numbers except x= -3 Thank you
January 8, 2011

Algebra
Is there an easier way to do this? "A freight train leaves a station at 4:00 p.m. traveling at 30 kilometers per hour. A passenger train leaves 1 hour later, traveling at 50 kilometers per hour. At what time will the passenger train overtake the freight train?
January 3, 2011

5th grade math
3/6 - 2/6 = 1/6
January 3, 2011

Physics
Consider a version of the atwood machine in which the masses are frictionless incline. The mass sliding on incline 1, m1, is 1.5 kg, and the angle of this incline is 62 deg. If the mass on the second incline, m2, is 2.5 kg, what is the angle 2 so that the system does not ...
December 28, 2010

math
how to make 29 9ths a mixed number
December 19, 2010

English
with my irl
December 16, 2010

Physics
Describe how an electroscope works?
December 14, 2010

algebra 2
The length of a rectangle is 5 less than 3 times the width. If the perimeter is 54 units, what is the length and the width?
December 14, 2010

algebra
combine and reduce 6b/3a + b/a = answer 3b/a
December 10, 2010

mrs. sue please read (History)
What about for single parents?
December 7, 2010

History quick question
Did people back in the 1700's use financial aid/assistance.?
December 7, 2010

huckleberry finn
thrashed (25) cowhiding (25) licked (26) skinned stonned tanned I do not know the page numbers for the last 3
December 5, 2010

Chemistry
Explain why CH2ClBr and CH2Cl2 do not have optical, geometric, or structural isomers?
December 2, 2010

physics
how many lunar radii are in one AU?
December 1, 2010

More Frequency - Physics
A guitar player plucks two strings simultaneously. One string is tuned to a (fundamental) frequency of 381 Hz. It is found that beats are audible, with a beat frequency of 5.54 Hz. What are possible values for the frequency of the other string? (Answer the larger frequency ...
November 29, 2010

Frequency - Physics
An organ pipe that is closed at one end has a fundamental frequency of 128 Hz. There is a leak in the church roof, and some water gets into the bottom of the pipe, as shown in the Figure. The organist then finds that this organ pipe has a frequency of 217 Hz. What is the depth...
November 29, 2010

math
Ms. Gutierrez needs to order rope for her gym class of 32 students. Each student will receive a piece of rope that is 5 feet 8 inches long. What is the total length of rope Ms. Gutierrez needs to order for her class?
November 26, 2010

Math
Rationalize the denominator. Assume all variables represent positive numbers? - 245x3 y5
November 23, 2010

physics
How much work must be done to stop a 1040 kg car traveling at 111 km/h?
November 22, 2010

Algebra
Show that two WRONG's can make a RIGHT. Replace each different letter in the addition problem with a different digit. It is required that O=zero.
November 21, 2010

Chemistry
Cobalt-60 is a radioactive isotope used to treat cancers. A gamma ray emitted by this isotope has an energy of 1.33 MeV (million electron volts; 1 eV = 1.602 multiplied by 10-19 J). What is the frequency (in Hz) and the wavelength (in m) of this gamma ray?
November 21, 2010

algebra 2
can you answer this question? a store is offering a discount of 30% on a suit. There is a sales tax of 6%. A) using a composition of function, represent this situatio in which the discount is taken before the sales tax is applied. B) using a composition of functions represent ...
November 16, 2010

sociology
Ok thank you so much for the help!! This is how I described the difference between them. Deviance-In a sociological context describes actions or behaviors that violate cultural norms including formally-enacted rules as well as informal violations of social norms. It is the ...
November 15, 2010

sociology
What is the difference between deviance and nonconformity?
November 15, 2010

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | Next>>

Search
Members