Thursday
April 17, 2014

Posts by anna


Total # Posts: 1,881

Physics
You push a box along the floor against a constant force of friction. When you push with a horizontal force of 78 N the acceleration of the box is 0.46 m/s2; when you increase the force to 86 N the acceleration is 0.76 m/s2. (a) Find the mass of the box. (b) Find the coefficien...

trig
If csc theta is equals to negative and theta is in the 3rd quadrant? a.find the other trigonometric function? b.find the value ofthe angle?

Living Environment
Explain why proteins are polymers but lipids are not.

English(Romeo and Juliet)
Capulet asks Nurse where Juliet has gone in the beginning of Act IV, scene 2. The Nurse indicates that she went to Friar Lawrence for confession purposes. Capulet responds by saying, "Well, he may chance to do some good in her. A peevish self-willed harlotry it is." ...

Living Environment
Can you find the latest Living Environment regents ?

English(Romeo and Juliet)
I need help with Romeo and Juliet Do you think it's appropriate to risk your life to be with another? Why do you think Juliet resorts to this? Explain In other words, what influences her decision?

Physics
A car is traveling 17 m/s when the driver sees a child standing on the road. He takes 0.8 s to react, then steps on the brakes and slows at 7.0 m/s2. How far does the car go before it stops?

Statistics
A study was conducted to investigate relationships between different types of standard test scores. On the Graduate Record Examination verbal test, 18 women had a mean of 538.82 and a standard deviation of 114.16, and 12 men had a mean of 525.23 and a standard deviation of 97....

science
Runner A is initially 5.0 km west of a flagpole and is running with a constant velocity of 4.5 km/h due east. Runner B is initially 7.0 km east of the flagpole and is running with a constant velocity of 6.5 km/h due west. How far are the runners from the flagpole when their pa...

Algebra1
Mrs.Culowski traveled 24.0 kilometers north and then 10.0 kilometers east. How far was she from her starting point? use pytheorn Theorm i need help seting up the problem?

Math Help
The length of an object in feet is equal to 3 times its length in yards. The length of a waterslide is 48 feet. Write and solve a multiplication equation to find the length of the waterslide in yards.

Biology
In human body, substances from blood filter through a membrane into renal tubule (kidney). What does an increase in the driving pressure correspond to?

Science
E = mc2 is a formula that shows, in mathematical terms, the relationship between energy and mass. In this formula, E is energy, m is mass, and c is the speed of light. The number 2 to the upper right of the c means that c is squared, or multiplied by itself.

Biology
What will happen to human red blood cells (crenate, lyse, or no change) if they are placed in the following solutions? 20% NaCl solution

Calculus-Related Rates
Three elementry kids are at a field day hula hoop contest. They were the last one standing of the heated competition. They have been hula hooping for 10minutes. Student1 (S1) is at point (6,5); Student2 (S2) is at point (6,1) while student 3(S3) is at (1,1). Finally, the gym t...

physics
A car stops for a red ligth. The light turns green and the car moves for 3 seconds at a steadily increasing speed. During this time, it travels 20 meters. The car then travels at a constant speed for another 3 seconds for a distance of 30 meters. Finally, when approaching anot...

Physics!!!
A small sphere of mass m = 6.40 g and charge q1 = 30.3 nC is attached to the end of a string and hangs vertically as in the figure. A second charge of equal mass and charge q2 = −58.0 nC is located below the first charge a distance d = 2.00 cm below the first charge as i...

physics
a 2kg pendulum swings at the bottom of a 1m rope. hen the pendulum is at the bottom of the swing, it is traveling at 2 m/s. determine the tension of the rope

physics
a 2kg pendulum swings at the bottom of a 1m rope. hen the pendulum is at the bottom of the swing, it is traveling at 2 m/s. determine the tension of the rope

math
Enter in standard form the equation of the line passing through the given point and having the given slope. B(2, - 5), m = -2/3

math
Where p and q are statements, "p and q" is false if p is false. Always Sometimes Never

math
The width of the rectangle is half its length and the perimeter is 42m.caculate the area of the rectangle.find the width and length of perimeter and area.

trig
I need help finding derivatives and antiderivatives. Given: f(x),find f'(x) 1. f(x)-2x^6 2. f(x)= -3x +7 3. f(x)= 3x^2 - 5x 4.f(x)= 1/2x^2 - x + 4

Organic Chemistry
So for the actual calculation.. would i just go 0.95 g benzoic acid * (10mL/0.680 g)?

Organic Chemistry
An impure sample contains 0.95g of benzoic acid and 0.05 of salicylic acid. Solubilities in water of the two compounds are given in the following table. Solubility at 20 degrees (g/10mL) benzoic acid: 0.029 salicylic acid: 0.22 Solubility at 100 degrees (g/10mL) benzoic acid: ...

Fine Arts
Thank you. Its in that category for my class. Do you know where i could find the influences upon Jack Kirby and Joe Simon??

Fine Arts
I am doing a report on the original comic book Captain America. I need to know the author, publishing date, info that pertains to the comic. Does anyone know where i can find it?

physics
a hydraulic lift is designed for a gain of 100, so that a 10 N force applied at theinput piston will produce a force of 1,000 N at the output piston. If the radius of the input piston is 2 cm, the radius of the output is a) 200 cm, b) .02 cm c) 400 d) 20 e) .05

physics
a cube of side L is made of a substance that is 1/4 as dense as water. WHen placed in a calm water bath the cube will a) float with 1/2 L abovethe surface b)sink to the bottom, c) float with 1/4 L above the surface d) float with 1/4 L below the surface e) float with 3&a...

Chemistry
If 0.273 moles of ferrous ammonium sulfate (Fe(NH4)2(SO4)2 . 6H2O) and an excess of all other reagents are used in a synthesis of K2[Fe(C2O4)3] . 3H2O, how many grams of product will be obtained if the reaction gives a 100% yield? Please help i found the molar mass of (Fe(NH4)...

Science
If .275 moles of ferrous ammonium sulfate (Fe(NH4)2(SO4)2. 6H2O) and an excess of all other reagents are used in a synthesis of K3[Fe(C2O4)3].3H2O, how many grams of product will be obtained if the reaction gives a 100% yield? Can someone help me solve this I found the molar m...

History
I have to write three major events or ideas from the book Tortilla Flat by John Steinbeck. I don't really know what could be considered as a major event. I know one can be that Danny died, falling into a ditch while he was drunk. Im not sure what else to write. Please help.

math
if the input is 24 what is the output? the table is: the input table: x,4,8,12,16 the output table is: y,1,2,3,4

math
If tan(xy) = x, then dy/dx =

world history
A strong, efficient government helped to unite Charlemagne's empire.

Science
Umm....... Do you mean, like, what I would do if I did the experiment again? What I would do to improve the experiment?

Science
For my science project, it says to write a "Future Research" section to go on the board. Could you just explain to me what exactly goes in that section? I'm so confused!

algebra
How do I graph the function f(x)+1/4x+4?

Need help
Studies have demonstrated that "latchkey children"

math
what is the area of a rectangle that is 3 yards wide by 8 yards long?

History
I need to list 3 problems of the colony that Stephen Fuller Austin founded. I have two of the three- -no food -bad indian relations I need one more!

Math
2x^2+8x=-5

chemistry
b) no reaction in the dark

chemistry
A) CH4 +Br2 sunlight-> CH3Br + Br

Science
So I'm in 7 grade and doing a science project. I have a question: What does it mean when it says: RESEARCH? I am required to have this on my board. Does it mean what I looked up to help me on this project? Also, what does it mean when it says: DATA? Do I just summarize wha...

Chem
Rank thefollowing elements in order of decreasing atomic radius. N, B, Be, Li? I thought it was N, B, Be, Li

Math-Help please?
Michael owns 300 shares of a certain stock. Suppose the price of the stock drops by $4 per share. Write a multiplication equation to find the change in Michael's investment. I put 300x(300x[-4]) is that right?

algebra
welcome! :)

algebra
yeah you are right, the lines mean absolute value, which is the numbers distance form zero. -25's distance form zero is 25, so you would put 25.

algebra
the dimensions are 6m by 8m

math
for the polynomial shown below, find f(-1). f(x)=3x^4-x^3+4x-2

Math
Based on its degree, what kind of polynomial is this? h(x)=-x^2+2x-5

english
Please could you help me with 6 words with silent letters ...please

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?

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

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

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

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?

chemistry
Calculate the molarity of the commercial bleach before it was diluted. bleach 6.25%

chemistry
Calculate the molarity of the commercial bleach before it was diluted. bleach 6.25%

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 approximati...

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?

chemistry
and what is the theoretical yield?

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 :)

calculus
thanks!

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 :)

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?

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?

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

science
What is the difference in Thermal Energy and Heat.

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

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?

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

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

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 enthal...

chemistry
72g

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

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

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

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

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

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 :))

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.

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 project...

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?

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

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.

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, whi...

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?

HELP!!!!!!!!!GEOMETRY!!!!
THANK YOU

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)?

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. De...

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.

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

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

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

algebra
3 (x-8)

algebra 1
What is the "quotient" of 19 and m?

Math
Solve for a: a^-1 + b^-1 = 1

Math
Thank you so much! What I did wrong was pluck in the wrong equation

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