Friday
October 24, 2014

Posts by ashley


Total # Posts: 2,806

Calculus
A ball is dropped from the top of a building. The height, , of the ball above the ground (in feet) is given as a function of time, , (in seconds) by y = 1640 - 16t^2 y'= -32t When does the ball hit the ground, and how fast is it going at that time? Give your answer in ...
November 14, 2010

calculus
A ball is dropped from the top of a building. The height, , of the ball above the ground (in feet) is given as a function of time, , (in seconds) by y = 1640 - 16t^2 y'= -32t When does the ball hit the ground, and how fast is it going at that time? Give your answer in feet...
November 14, 2010

AP PHYSICS
Work done by friction= forcefriction*distance=mu(fn)*distance where fnormal= mg-2.3E2Sin21 Fd= (.200)(.700X9.8X-2.3E2Xsin21)X(7)= Work done by friction=19790.15328.. thats what I got and it is wrong i believe
November 14, 2010

AP PHYSICS
It did not work thats why I wanted to see if someone else had a better input. It was the wrong answer.
November 14, 2010

AP PHYSICS
A 2.30 102 N force is pulling an 80.0 kg refrigerator across a horizontal surface. The force acts at an angle of 21.0° above the surface. The coefficient of kinetic friction is 0.200, and the refrigerator moves a distance of 7.00 m. Find the work done by the kinetic ...
November 14, 2010

algebra
(c+g)(c^2-cg+g^2)
November 13, 2010

Math
What are the horizonatal asymptotes of y=(1000)/(1+9e^(-.1656x))?
November 12, 2010

Math
What are the horizonatal asymptotes of y=(1000)/(1+9e^(-.1656x))?
November 12, 2010

Literature
According to charley's psychiatrist, how can charley's visit to the third level be explained
November 11, 2010

physics
A patient is to be given a blood transfusion. The blood is to flow through a tube from a raised bottle to a needle inserted in the vein . The inside diameter of the 4.8 cm long needle is 0.48 mm, and the required flow rate is 4.9 cm^3 of blood per minute. How high h should the...
November 11, 2010

Physics Help!!!
In one cycle, a heat engine absorbs 5900 J at 360°C and exhausts 520 J. How much work does it do per cycle?
November 11, 2010

math
If a cardboard box measures 1 1/2 feet on each side what expression will represent the volume of the box
November 10, 2010

western experience
Oh thats right!My second thoght was E. feminists
November 9, 2010

western experience
Can someone please check my answers? 1. In the early 1970s the only European nation capable of meeting its own oil production needs was A. Great Britain B. France C. Germany D. the soviet union E. Spain D. The soviet union 2. Which group has seen its imporance in European ...
November 9, 2010

science
1.accerlate 2.Friction
November 9, 2010

history
What did Americanization reveal about white Americans view of Native Americans?
November 9, 2010

Physics
O ok. My teacher told us we had to separate it into 3 separate parts, but i'm not sure how to do that.
November 9, 2010

Physics
A hot air balloon starts at its launching station and it goes at a horizontal speed of 2.7 m/s and a vertical wind of 1.1 m/s. Once it reaches an altitude of 202 m, it stays at that altitude for 10.3 s, which is when it drops a sandbag. How far will the sandbag land from the ...
November 9, 2010

Western Civilization
In the postwr West, philosophers and intellectuals have challenged many of the assumptions abouth truth, objectivity, science, and progress that have dominated the Western outlook since the Enlightenment. Summarize the arguments and approaces of the most important poswar ...
November 9, 2010

Physics
where did you get 4.6*10^6?
November 8, 2010

Physics
A satellite has a mass of 5600 kg and is in a circular orbit 3.70*10^5 m above the surface of a planet. The period of the orbit is two hours. The radius of the planet is 4.20*10^6 m. What is the true weight of the satellite when it is at rest on the planet's surface?
November 8, 2010

physics
A man who weighs 50.0 N stands 3.00 m from the right end of a board that is supported by two vertical cords attached to either end of the board. The board is 5.00 m long and weighs 10.0 N. What is the tension in each of the two cords?
November 7, 2010

math
Explain, in complete sentences, how you would use the graphing method to solve the following system of equations. Provide the solution to the system and explain what the solution represents on the graph. x + 4y = –16 3x + 2y = 12
November 5, 2010

Physics, PLEASE HELP!!
A long jumper jumps with the initial velocity of 12.0 m/s at an angle of 20 degrees. what is the displacement of x?
November 5, 2010

calculus
it doesn't work
November 5, 2010

8th grade
It would be T(n)=20+.75n
November 5, 2010

physical science
Platinum has a density of 23.4g/cm3. What is its mass?
November 5, 2010

history
Many subjects connected with our social economy call for immediate improvement. As examples: We should bring more citizens under the coverage of old-age pensions and unemployment insurance. We should widen the opportunities for adequate medical care. We should plan a better ...
November 5, 2010

chemistry
A stock solution is prepared by adding 26 mL of 1.1 M K3PO4 to enough water to make 30 mL. How many moles of K+ are in 21 mL of the stock solution?
November 4, 2010

Physics-Please help explain
What happens to a rollercoaster's motion in terms of energy when it goes over a second hill that is higher than the first hill.I think it is because the kinetic energy does not have the momentum so when converted into PE, it can't make it over a higher hill. Coorect or...
November 4, 2010

Physics
Suppose I apply a force to an initially motionless object. I push on the edge at an angle of 30 degrees. What is the torque on this object in terms of r and F?
November 4, 2010

logarithmic differentiation
How do you find the logarithmic differentiation of y = x^-cos x ?
November 4, 2010

Social Studies
Each European group that set up colonies settled in the specific part of the Americas. What are the two facts that lead to that generalization?
November 2, 2010

Social Studies
Describe the geographical features of your community or region. How might they have influenced people to settle there?
November 2, 2010

physics
A fountain reaches a height of 140 m. The pumps provide 0.50 m^3/s of water. What is the radius of the jet at the bottom of the fountain? Hint: find the velocity first, then use continuity.
October 31, 2010

physics:energy
A car (mass 920 kg) drives up a hill (height 328 m) in 143 seconds. At the bottom of the hill, it has a speed of 24 m/s, but at the top, it has slowed down to 14 m/s. Neglecting friction, what is the average engine power? I tried using 1/2mv^2 and it didn't work.
October 31, 2010

Physics
I think we might be in the same physics class. For this question I put -12 and was incorrect...what did you put so we can get the answer choices down to two options?
October 30, 2010

4th grade
PLEASE HELP ME MY HOMEWOrk rK HAVE TO TURENED IT IN TOMMOROW!!!!!!!!!!!!!!!!!!!!!!!!!AAHHHHHHHHHHHHH GOING CRAZY
October 27, 2010

trig
Rewrite the expression in terms of the first power of the cosine. Use a graphing utility to graph both expressions to verify that both forms are the same. 5 sin6(x)
October 25, 2010

Math
Using only the numbers 1-8 without repeating any of them, what is _+_=_-_=_-_=_-_=_? And the last number has to be the same as the first cause it's in a circle don't forget!!
October 25, 2010

Senator
Can you help me write a speech to become the high school senator? i need to get a good one that really hooks the kids.
October 25, 2010

English
you spelled arrived wrong.
October 24, 2010

English
What patriotism means to me? any good ideas on what to say?
October 24, 2010

Physics
A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the circle...
October 24, 2010

Physics
A 9.5 kg monkey is hanging by one arm from a branch and is swinging on a vertical circle. As an approximation, assume a radial distance of 90 cm between the branch and the point where the monkey's mass is located. As the monkey swings through the lowest point on the ...
October 24, 2010

science
Give the condensed structural formula for 1-butanol. (Type your answer using the format CO2 for CO2.)
October 23, 2010

physics
In a typical golf swing, the club is in contact with the ball for about 0.0010 . If the 45- ball acquires a speed of 57 , estimate the magnitude of the force exerted by the club on the ball.
October 22, 2010

Statistics
lbkjub
October 22, 2010

Science
Give the condensed structural formula for 1-butanol
October 21, 2010

biology
in biology we are studying taxonomy. we are classifying our organisms by broadest to most specific: kingdom phylum class order family genus species how would i do this for a Siberian tiger?
October 21, 2010

8th grade Science
What does Air Mass Consist of?
October 21, 2010

physics
A solid disc with radius R is is spinning. An object exerts a force F at the edge of the disc to slow down the disc. The disc slows down to rest in 2.0 seconds. How long would the disc take to stop if: the mass of the disc doubled in s the radius of the disc doubled in s the ...
October 21, 2010

government
why would people consider sending united states troops to intergrate a local school?
October 20, 2010

Chemistry
q= 2409.88 is that right?
October 20, 2010

Chemistry
What is the enthalpy change when 19.0 g of water is cooled from 33.0°C to 2.70°C?
October 20, 2010

Chemistry
What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it?
October 20, 2010

Chemistry
What is the enthalpy change when 19.0 g of water is cooled from 33.0°C to 2.70°C?
October 19, 2010

Chemistry
What is the change in internal energy (in J) of a system that absorbs 0.677 kJ of heat from its surroundings and has 0.438 kcal of work done on it?
October 19, 2010

Chemistry
A sample of an unknown gas effuses in 11.1 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.02 min. What is the molar mass of the unknown gas?
October 18, 2010

Chemistry
A sample of an unknown gas effuses in 11.1 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.02 min. What is the molar mass of the unknown gas?
October 18, 2010

phyisc
Write and balance the reaction for the complete combustion of methanol, CH3OH. (Type your answer using the format CO2 for CO2. Use the lowest possible coefficients.) 1CH3OH + 2 3 ¨ 4 5 + 6H2O
October 16, 2010

Phyics
Balance the following equations? a) Fe(OH)2 + 2O2 + 3H2O ¨ Fe(OH)3 (b) 5Sr + 6H2O ¨ 7Sr(OH)2 + 8H2 (c) 9Al + 10Fe3O4 ¨ 11Al2O3 + 12Fe (d) 13Pb(NO3)2 ¨ 14PbO + 15NO2 + 16O2 (e) 17O2 + 18N2H4 ¨ 19H2O2 + 20N2 (f) 21C4H10 + 22O2 &#...
October 16, 2010

Chemistry
A mixture of 0.47 mole of H2 and 3.59 moles of HCl is heated to 2800C. Calculate the equilibrium partial pressures of H2 Cl2 and HCl if the total pressure is 2.00 atm. For the reaction Kp is 193 at 2800C. H2(g) +Cl2(g) = 2HCl (g) I know that I need to find the total numbers of...
October 16, 2010

Chemistry
Chemistry equilibrium? Consider the reaction 2NO(g) + O2(g) = 2NO2(g) at 430C an equilibrium mixture consists of 0.020 mole of O2, 0.040 mole of NO, and 0.96 mole of NO2. Calculate Kp for this reaction given that the total pressure is 0.20 atm. I used PV=nRT to find the volume...
October 16, 2010

physics 111
1) distanceX(ForcepushXcos25) 2) no work - no force in direction of motion 3) no work - no force in direction of motion 4) same as number 1 because table is frictionless and horizontal
October 15, 2010

algebra
the sum of the four angle measures of any convex quadrilateral is 360 degrees. if a certain convex quadrilater has angle measures of 60, 2y-10, and 10y+5 degrees, what is an expression for the degrees measure of the fourth angle?
October 15, 2010

Physics
For Vx which is the horizontal velocity component: Vx=d/t Vx=.385m/.350s= 1.10m/s For Vy the vertical velocity component: Vy=gt g=-9.8m/s2 for gravity Vy=(-9.8m/s2)(0.350s)= -3.43m/s
October 15, 2010

math
Shonda owns a bussiness that transfers photos to CD-ROMs. She charges her customers $24.95 for each CD-ROM. Which of these equations could be use to calculate her profit 'p' for creating 'n' CD-ROMs? a)p=(24.95-0.8)n - 575 b)p=(24.95+0.8)n + 575 c)p=24.95n - ...
October 14, 2010

algebra
Pythagorean Theorem, The height of sueLo's 5th floor apartment window off the ground is 10 feet longer than the distance from the base of the apartment building to wall. She is concerned that the fire department's 50-foot ladder would not be able to reach her window in...
October 14, 2010

8th grade math
6/9 because the highest number that can be divided by both the numerator and the denominator is 11, so 66 divided by 11 is 6 and 99 divided by 11 is 9 so you get 6/9.
October 13, 2010

american literature
Which one of the following statements is not true about the president Ratcliffe portrayed in The General History?
October 13, 2010

Computer Science
1.Write an Assembly program that reads in a number of cents. The program will write out the number of dollars and cents separately. Sample Run: ? 324 3 24 2. Write an Assembly program to read three numbers in from the user, and output BOTH the sum and the product of the three ...
October 13, 2010

physics
a 60kg man is on a steadily rotating Ferris wheel. the man is standing on a bathroom scale and the scale reads 45kg at the top of the wheel. take g=10m/s^2 (a) what does the scale read when the man is at the bottom of the wheel? (b)what does the scale read when the man is ...
October 11, 2010

Chemistry
HNO3+NaOH --- H2O+NaNO3 What is formed in the solution besides Cu(OH)2?
October 11, 2010

physics
thank you so much this really helps :)
October 8, 2010

physics
i don't quite understand how you reduced 200N to 162N ?
October 8, 2010

physics
you find it takes 200N of horizontal force to move an empty pickup truck along a level road at a speed of 2.4m/s. you then load the pickup truck and pump its tires so that its total weight increases by 42% while the coefficient of rolling friction decreases by 19%. now what ...
October 8, 2010

U.S. History
true or false The Pueblo settled in the valley of Mexico during the 1200s and developed a thriving and sophisticated civilization.
October 8, 2010

science
that doesn't tell me which is better between the 2 and why?
October 7, 2010

science
why is the robinson projection better than the mercator projection map?
October 7, 2010

science
which is better the projection map or the mercator map and why??
October 7, 2010

Algebra
What is are the coordinates of the center and the radius of the circle with the equation (x+3)^2 + (y-5)^2 = 16 ?
October 7, 2010

World Literature
After reading Gilgamesh, Genesis, and Metamorphoses, what are the major similarities and differences in the stories?
October 7, 2010

3rd grade math
If he played for 30 mins on Tuesday and played for 15 mins longer on Weds then he did on Tues, you add 30+15 to get 45. So on Weds he played for 45 mins.
October 7, 2010

AP World History
I am suppose to write a DBQ tomorrow on the Hans and Romans. My prompt states: analyze the Han and Roman attitudes towards Imperial Power and the State.
October 6, 2010

Biology
Can someone please explain how enzymes work? I need to know the parts of one too.
October 6, 2010

Physical Science
Why a person can lie down(carefully) on a bed of nails, but can't step(without being injured)on a nail?
October 5, 2010

PHYSICAL SCIENCE
What is happening with parameters(pressure, volume, and temperature)of an air bubble released by a frog at the bottom of a lake and explain why?
October 5, 2010

Math
A company pays commissions of 6% on the first $500 in sales and 8%on sales over $500.What is the commission on an $800 sale?
October 4, 2010

math
you sellect four packages of modeling clay and a set of tools for a craft project.If there is a 6% sales tax,how much money will you need to buy these supplies? Clay:$2.79 each plus tax Tools:$1.79 plus tax
October 4, 2010

math
Find the sales tax rate for each purchase. Purchase,$25.79;Tax,$1.29
October 4, 2010

math
There are 24 blanks so it goes The rookie football player wo kept asking his coach to flood the football field with water so he could go in as a sub Most people forgot the other football in front of the field and so it was wrong Thx for reading
October 4, 2010

Chemistry
1) You are given solutions of HCl and NaOH and must determine their concentrations. You use 37.0mL of NaOH to titrate 100mL of HCl and 13.6 mL of NaOH to titrate 50.0mL of 0.0782 M H2SO4. Find the unknown concentrations. Molarity of NaOH and molarity of HCL? 2) Sodium ...
October 4, 2010

college
1) You are given solutions of HCl and NaOH and must determine their concentrations. You use 37.0mL of NaOH to titrate 100mL of HCl and 13.6 mL of NaOH to titrate 50.0mL of 0.0782 M H2SO4. Find the unknown concentrations. Molarity of NaOH and molarity of HCL? 2) Sodium ...
October 4, 2010

PHYSICSS
A block is projected up a frictionless inclined plane with initial speed v1 = 3.40 m/s. The angle of incline is è = 31.1°. (a) How far up the plane does it go?(m) (b) How long does it take to get there? (s) (c) What is its speed when it gets back to the bottom?(m/s)
October 3, 2010

physicsssss
two blocks are connected over a pulley. The mass of block A is 10 kg and the coefficient of kinetic friction between A and the incline is 0.24. Angle èof the incline is 30°. Block A slides down the incline at constant speed. What is the mass of block B?
October 3, 2010

8th grade
Why Do Girls Like Guys Who Wear Shirts With Eight Buttons?
October 2, 2010

algebra
Write and solve an inequality to find the approximate circumference of Earth using the following information - the 4 million miles of public roads in the U.S. would: Reach to the moon and back more than eight times, circle the globe more than 157 times
September 29, 2010

science
Explain why a bullet with a mass of 15 grams and a velocity of 400 m/s has more momentum than you at rest. Calculate the momentum for both.
September 28, 2010

calc 3
find the arc length of the curve r(t)= <6sqrt(2),e^t,e^(-6t)>
September 24, 2010

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