Thursday
August 28, 2014

Posts by anna


Total # Posts: 1,924

english
Please could you help me with 6 words with silent letters ...please
November 14, 2011

physics
a pet truck is moving at 25m/s north, a dog inside moves at 1.75 m/s at angle 35 degrees east of north. What is the velocity of the dog relative to the road?
November 13, 2011

Math
What is the volume of a sphere with a radius of 7 cm? Use 22/7 as pi.
November 13, 2011

chem
Suppose that the microwave radiation has a wavelength of 10.8cm . How many photons are required to heat 295ml of coffee from 25.0 C to 62.0 C? Assume that the coffee has the same density, 0.997g/ml , and specific heat capacity, 4.184J/(gk) , as water over this temperature range
November 11, 2011

english
why do u think Edwards felt it was necessary to terrify his puritan audience into action?
November 9, 2011

Math
A television station has 28 new TV shows scheduled to air this week. What fraction of the television shows, in simplest form, are 30-minuet programs?
November 8, 2011

chemistry
Calculate the molarity of the commercial bleach before it was diluted. bleach 6.25%
November 3, 2011

chemistry
Calculate the molarity of the commercial bleach before it was diluted. bleach 6.25%
November 3, 2011

physics
water at 20°C has viscosity n=1.0*10^-3 Ns/m^2. sand grains have density 2400kg/m^3. suppose a 1.1 mm diameter sand grain is dropped into a 51m deep lake whose water is a constant 20°C. If the sand grain reaches terminal speed almost instantly (a quite good ...
November 2, 2011

physics
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.5 x 10 exponent 5 kg, its speed is 27.0 m/s and the net braking force is 4.30 x 10 exponent 5 N, (A) what id its speed 7.50 s later? (b) how far has it traveled in this time?
November 1, 2011

chemistry
and what is the theoretical yield?
October 29, 2011

chemistry
a student set up a reaction with 0.2905g of cholesterol and 0.13g of nonanoyl chloride in excess triethylamine, and collected 0.0244g of solid product. what is the actual yield (in grams) of cholesteryl nonanoate? explain how to do this please :)
October 29, 2011

calculus
thanks!
October 28, 2011

calculus
Find all values of 'a' such that y=a/(x−9) and y=x^2−18x+81 intersect at right angles. show steps please :)
October 28, 2011

MATH
A town decides to build a playground using one of the existing walls beside an elementary school. What is the maximum area they can enclose using only 100ft of donated fence?
October 28, 2011

physics
Suppose a 46-N sled is resting on packed snow. The coefficient of kinetic friction is 0.11. If a person weighing 625 N sits on the sled, what force is needed to pull the sled across the snow at constant speed?
October 27, 2011

science
How does the Kinetic Theroy of Heat explan Solids, Liquids, and gasses?
October 24, 2011

science
What is the difference in Thermal Energy and Heat.
October 24, 2011

Phyisical science
How much energy is in a soccer ball that is moving at 3 m/s and has a mass of 2kg.
October 24, 2011

chemistry
A 48 g sample of water at 98.°C is poured into a 55 g sample of water at 15°C. What will be the final temperature of the mixture?
October 20, 2011

Please check drwls
1.C 2.d 3.A I don't know is it correct.
October 20, 2011

Chemistry
What would be the products of this chemical reaction?? Co(NO3)2 (aq) + NH3 (aq) = ?????? a precipitate is supposed to be formed.
October 18, 2011

chemistry
CH3OH(g) ----> CO(g) + 2H2 (g) (delta H =+90.7k) A) is heat absorbed or released in the course of this reaction? b) calculate the amount of heat transferred when 45.0g of CH3OH(g)is decomposed by this reaction at constant pressure. c) for a given sample of CH3OH, the ...
October 17, 2011

chemistry
72g
October 2, 2011

accounting
Describe the relationship of the financial statements used in the financial plan for 2010 for Patton-Fuller Community Hospital.
September 30, 2011

Chemistry
Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH
September 29, 2011

Chemistry
Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH
September 29, 2011

Chemistry
Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH
September 29, 2011

Chemistry
Which of these is best described as an acid-base reaction? KCl + NH4NO3 = KNO3 + NH4Cl NH3 + H2O = NH4 + OH
September 29, 2011

Science
a question regarding Universal Law Of Gravitation. If the clouds are 50 km. high , what is its proportional distance to a globe which is one foot in diameter ? Thank you :))
September 28, 2011

Economics
I'm trying to research for a paper about why we shouldn't have flat tax rate, and a reason that i'm seeing people putting online, is that a flat tax rate of say, 18% would decrease tax revenue? Can someone explain how? I don't understand how taxes work.
September 26, 2011

improving it without changing its overall meaning
Ever been assigned to work on a group project for class! Many students dread group projects: because one student typically does most of the work. Unfortunately for some, group work does not end when students leave school, many employers use teams to accomplish ongoing ...
September 26, 2011

science
A 4.3 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.43 m above the counter?
September 24, 2011

math
draw a diagram to show how to find the solution 2.6 / 0.4 explain what the quotient means
September 19, 2011

Math
Pedro says the next expression in the following pattern is n+17,n+18,n+15,n+16,n+13,n+14._____ . Explain his error and write the correct expression.
September 19, 2011

Politics
I'm writing a speech, and it's about the topic "Private sector investment is preferable to public sector investment for Human Space Exploration" I'm on the con side for this argument, and one of my reasons was that public sector will spur cooperation, ...
September 18, 2011

physics
A 747 jetliner lands and begins to slow to a stop as it moves along the runway. If its mass is 3.5 x 10^5 kg, its speed is 27.0 m/s and the net braking force is 4.30 x 10^5 N, (A) what id its speed 7.50 s later? (b) how far has it traveled in this time?
September 18, 2011

HELP!!!!!!!!!GEOMETRY!!!!
THANK YOU
September 15, 2011

HELP!!!!!!!!!GEOMETRY!!!!
WHAT IS THE PERIMETER OF A SQUARE WHOSE VERTICLES ARE A(-4,-3), B(-5,1), C(-1,2), AND D(0,-2)?
September 15, 2011

Computer Science
An advertising agency wants to send a letter to all of its clients announcing a new fee schedule. The clients' names are in several different lists (arrays). The company merges the various lists to form one array, but clients could be listed in the array more than once. ...
September 13, 2011

algebra
Ms. Sue, I apologize, but all I'm getting is answers, I need to know how to work them out myself as my teacher didn't make himself clear.
September 9, 2011

algebra
how do i simplify -10 - (-7n) + (-9n)
September 9, 2011

AP Biology
What is important for reproducing animals? i dont exactly understand the question, help!!
September 7, 2011

stats
women age 20-29 is 36ml staandard deviation 7ml. What is probability greater than 45ml and between 30 and 62 ml
August 27, 2011

algebra
3 (x-8)
August 26, 2011

algebra 1
What is the "quotient" of 19 and m?
August 22, 2011

Math
Solve for a: a^-1 + b^-1 = 1
August 15, 2011

Math
Thank you so much! What I did wrong was pluck in the wrong equation
August 14, 2011

Math
A line has a slope of m = -1/3 and passes through the points (-4,k) and (2,3). Fine the value of k
August 14, 2011

Math
Solve for x: 6/x + 8/9 = 10/3x
August 9, 2011

calculus
(a) Modifying the parametric equations of a unit circle, find parametric equations for the ellipse: x^2/a^2 + y^2/b^2 = 1 (b) Eliminate the parameter to find a Cartesian equation of the curve x=2sint; y=4+cost; t >(or equal to) 0
August 8, 2011

Precalc(attn Bobpursley)
Hi i posted this before but I wanted to ask Bobpursley a few questions on his reply 1)For the first function you used cosine when they ask for sin, why is that? Also why did you put .5 in the beginning and end of the function? 2)For the second question why did you put 10 in ...
August 5, 2011

Precalc
okay sorry last two questions! I promise! The sun always illuminates half of the moon’s surface, except during a lunar eclipse. The illuminated portion of the moon visible from Earth varies as it revolves around Earth resulting in the phases of the moon. The period from a...
August 5, 2011

Precalc
of course! thanks!
August 5, 2011

Precalc
Okay for this question I know I am supposed to use the law of sines. But how can i tell what side is what? In right triangle ABC, a = 120 and c = 140, and ÐC is the right angle. Solve the triangle. Round to the nearest tenth, if necessary.
August 5, 2011

Precalc
oh I see thank you very much I totally get it now
August 5, 2011

Precalc
How do you know to use cos and not sine?
August 5, 2011

Precalc
oops sorry never mind
August 5, 2011

Precalc
where did the 12 come from?
August 5, 2011

Precalc
I am having trouble figuring out this question Jan observes a buoy bobbing up and down through a total amplitude of 8 feet. Beginning at the top of the wave, if the buoy completes a full cycle every 8 seconds, what is the height of the buoy relative to its lowest point after ...
August 5, 2011

math
Thanks hon!
August 4, 2011

math
(f-g) (fx)=1/x+2 g(x)= 3x I got -3x^2-6x+1/x+2 is this correct?
August 4, 2011

Precalc
Hello I need help with this question. I know that the formula for angular velocity is w= theta/time. I also know that the answer is 750 rpm. I am just not sure how to get that answer A truck driver travels at 58 miles per hour. The truck tires have a diameter of 26 inches. ...
August 2, 2011

calculus
The integral of sinx is from 2pi to infinity
July 31, 2011

calculus
Recall that a function G(x) has the limit L as x tends to infinity, written lim(x->infinity)G(x) = L, if for any epsilon > 0, there exists M >0 so that if x > M, then |G(x) − L| < epsilon. This means that the limit of G(x) as x tends to infinity does not ...
July 31, 2011

integral
thanks
July 31, 2011

integral
complete the integral e^(x^1/3)
July 31, 2011

Alg 2
a rectangular picture frame measures 8 inches by 4 inches. You want to triple the frame's area by adding the same distance, x, to the length and width. Find the value of x and find the new dimensions of the frame. How do you do this?? Please show work
July 26, 2011

MicroEcon
The market for apple pies in the city is competitive and has the following demand schedule: Price Quantity Demanded $1 1,200 2 1,100 3 1,000 4 900 5 800 6 700 etc... 13 0 Each producer in the market has fixed costs of $9 and the following marginal cost: Quantity Marginal cost ...
July 26, 2011

geometry
what kind of triangle has sides of lenght 12,16,24?
July 22, 2011

medical coding
A condensed summary compiling information about a particular field of knowledge is a a. compendium b. compliance manual c. treatment guidelin d.pharmacopeiae
July 17, 2011

Spanish
Thanks so much for the explanation! I understand the reason now.
July 11, 2011

@SraJMcGin Spanish
oh and for 16) i got por
July 10, 2011

@SraJMcGin Spanish
El abuelo de Guillermo le cuenta sobre un viaje en barco a Espana. Completa el parrafo con por o para. Cuando fui a Espana (12____) primera vez, se viajaba (13____). Estuve en el oceano (14____) diez dias (15____) una tormenta horrible. Pero, (16____) ser un viaje tan largo, ...
July 10, 2011

Spanish
El abuelo de Guillermo le cuenta sobre un viaje en barco a Espana. Completa el parrafo con por o para. Cuando fui a Espana (12____) primera vez, se viajaba (13____). Estuve en el oceano (14____) diez dias (15____) una tormenta horrible. Pero, (16____) ser un viaje tan largo, ...
July 10, 2011

Spanish
Oh!!! I understand now! Wow, that really cleared it up for me! Muchas gracias Sra! This will really help me with the rest of my class.
July 9, 2011

Spanish
oh thank you! one more question: for 9. if it is the familiar command aren't i supposed to take comer drop the -er and add the opposite ending so it becomes coma? so shouldn't the answer be C?
July 9, 2011

Spanish
Gracias Sra! Sorry for the trouble at first!
July 9, 2011

Spanish
of course, I am so sorry for the inconvenience! Choices A) dar por sentado B) descomponerse C) comprensivo D) el caparazon E) herir Statements to Match With Choice 1. Usualmente los amigos son así si tenemos problemas y necesitamos a alguien para escucharnos y hacernos ...
July 9, 2011

chemistry
what is the experimental errors in determining the formula unit of zinc chloride?
June 25, 2011

math
Thank you Henry! I really appreciate your help! :) Great!
June 23, 2011

math
I cant figure this thing out fully, I feel so clueless. Does anyone have any pointers or tips for me? Company needs a new copy machine. Rent costs are = 17.5 cents / each. Number of copies = atleast 200 000. (The company agrees to buy at least that number) Buying the unit ...
June 23, 2011

Spanish
4. ¿Qué pasa? ¿No me oyes? A) si, te oigo. B) si, les oigo. C) no, no se oigo. D) no, no me oigo. 7. Le compro un regalo para mi hermana. A) se la compro esta tarde. B) me lo compro esta tarde C) te las compro esta tarde. D) se lo compro esta tarde. 9. Te...
June 20, 2011

Cultural Diversity
the lanaguage learning approach of certain non-mainstream cultures seems to require children to do what in regards to human speech
June 10, 2011

chemistry
As a lab, we will be given a small amount of calcium and will be told to find the mass of it without using a scale( using stoichiometry or mols?) I just don't know how to do this! Thanks!
May 29, 2011

algebra
yes
May 26, 2011

Math
The length and width of the field as a ratio of 11:7. The width is 20 meters less than the length. How many m2 is the area?
May 21, 2011

Spanish-7th grade-Please check
hmm.. i would say 1 because the picture does not show the family actually watching t.v.
May 19, 2011

CHEMISTRY
If one added 130 mL of 2 M NaOH to 1 L of a buffer composed of 2.3 M NH3 and 3.2 M NH4Cl, what would be the pH of the resulting solution? The Kb of NH3 is 1.8 × 10−5.
May 17, 2011

History
Can i have a short summary of the spanish conquest 1492-1580? main events, ex: slave trade, colonization, etc
May 16, 2011

7th grade math
-2(8-4)-8(-6-8)= im notsure how to do this can someone please explain how to do this and what the answer is, i keep coming up with 2 but thats not right. i need help!
May 16, 2011

trig
determine all trig functions of theta using the given info, state the answers correct to the nearest hundredth. cos (theta) = -5/13; tan (theta) < 0
May 14, 2011

Chemistry
Calculate the theoretical pH after 2.50ml and 9.50ml of NaOH has been added in both the titration of HCl and of HC2H3O2.
May 10, 2011

chemistry
for the vaporization of water at 1.00 atm, delta H=43.54 kj/mol at 298 K and delta H= 40.68 kj/mol at 373 K. the constant-pressure heat capacity of liquid water is 75.3 J/molK. calculate the constant pressure heat capacity for H2O(g).
May 9, 2011

Science
A 7-kg brick is dragged across the floor by a horizontal force of 42 N. If a frictional force of 18 N also acts on the brick, what is its acceleration?
May 3, 2011

Science
To determine the mass percentage of an iron sample, the dissolved sample [iron exists at the start as iron(II)] was titrated with potassium permanganate (permanganate forms manganese(IV) oxide.)If 22.25 cubic cm of 0.0123 potassium permanganate, what is the mass percent of ...
May 2, 2011

science
A skateboarder initially traveling at 1.8 m/s accelerates at a rate of 1.5 m/s squared for 2.5 s. How far does the skateboarder go in this time? What is the equations used, variable solving for, and of course the solution.
April 21, 2011

science
If we were to watch a sunset, how long is it from the time the Sun begins to set until it is dark?
April 21, 2011

Geometry
Find the area of a regular octagon with a perimeter of 80 inches round to the nearest tenth
April 18, 2011

spanish
Using the subject “usted” and the verb in the imperative, tell your instructor three things she or he must do. Then tell your instructor two things she or he must not do. You will be graded on accuracy and pronunciation. Provide your sentences in Spanish.
April 18, 2011

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Search
Members