Tuesday
September 30, 2014

Posts by ashley


Total # Posts: 2,755

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

Math
find the equation of the givin pair of points and write in slop intercept form. (1/3,-5) (13/3,-8)
September 24, 2010

dynamics
D and F only
September 22, 2010

geometry
As the marketing designer for Burger King, you are given a 4 in by 6 in logo and have been told to create an advertisement that is six times larger. What is the area of your advertisement (in feet)? [12 inches = 1 ft] A. 6 ft2 B. 36 ft2 C. 72 ft2 D. 3 ft2
September 21, 2010

Chemistry
What minimum frequency of light is required to ionize potassium?The energy required to ionize potassium is 419kJ/mol?
September 18, 2010

PHYICS
what about 13/8 0 31/15 P
September 18, 2010

PHYICS
Pick the radioactive isotope in each set 14/7 N OR 23/13 AL EXPLAIN A)its atomic number is greater than 83 B)it has fewer n than p in the nucleus C)it is an odd-odd nuclide none of the above
September 18, 2010

physics
Pick the radioactive isotope in each set 23/11 na or 20/9 f explain why a)its atomic number is greater than 83 b)it has fewer n than p in the nucleus c)it is an odd-odd nuclide none of the above
September 17, 2010

phyics
Pick the radioactive isotope in each set. 23/11 20/9 Explain your choice. a)its atomic number is greater than 83 b)it has fewer n than p in the nucleus c)it is an odd-odd nuclide none of the above
September 17, 2010

phyics
i dont think it 4
September 17, 2010

phyics
Tritium (half-life = 12.3 y) is used to verify the age of expensive brandies. If an old brandy contains only the following fraction of the tritium present in new brandy, how long ago was it produced? 1/16
September 17, 2010

geometry
two triangular roofs are similar. The ratio of the corresponding sides of these roofs is 2:3. If the altitude of the smaller roof is 4.5 feet, find the corresponding altitude of the larger roof. Round to the nearest hundredth. A. 7.5 B. 6.75 C. 6 D. 4
September 17, 2010

Biology 9th grade
I don't know
September 16, 2010

World Geography
which climate region occurs more frequently along the Equator
September 16, 2010

4th grade
what's a good sentence for glacier
September 14, 2010

Physics
6.2seconds
September 14, 2010

Math
Please help!! We can determine the time it would take an object to fall (if there were no air resistance) by using the formula where d is the distance.t=1/4sq.root of d, d being the distance 1. We can determine the time it would take an object to fall (if there were no air ...
September 13, 2010

chemistry
Radio waves travel at the speed of light which is 3.00 x 108 m/s. How many minutes does it take for a radio message to reach Earth from Saturn if Saturn is 7.9 x 108 km from Earth?
September 12, 2010

11th grade
Write your own journal entry from the perspective of a member of Bradford's colony. What do you think of these unruly pirates? What shocks you the most about these surly characters? How do the manners of the pirates differ from yours? Visit the Calvinism in New England ...
September 9, 2010

grade 6 math
I have a input and output machine . The input number is 5 and the output number 4. the second input number is 10 and the output is 5. I am having a hard time finding the operation. Can some please help thanks
September 8, 2010

calculus
an open rectangular box is to be made from a piece of cardboard 8 inches wide and 8 inches long by cutting a square from each corner and bending up the sides. a. express the volume of the box as a function of the size x cutout
September 7, 2010

Chemistry
C5H5SNO
September 6, 2010

Math
Is this right? Simplify by removing factors of 1. 2m^2+2m/10m^2+4m My answer is m^2/5m^2+2m
September 5, 2010

science
i dont understand it
September 4, 2010

science
On a particular day, the following appliances are used for the times indicated: coffee maker, 40 min, and microwave oven, 23 min. Using the power requirements given in the table below, find how much it costs to use the appliances at an electrical cost of 8¢ per kWh. ...
September 4, 2010

physical science
A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter
September 4, 2010

phyical science
so will the cost be 0.01cents
September 4, 2010

phyical science
A microwave oven has a power requirement of 1235 W. A frozen dinner requires 6.0 min to heat on full power. (a) How much electrical energy (in kWh) is used? 1 kWh (b) If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner? 2¢ what is kwh ...
September 4, 2010

work/science
A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter?
September 3, 2010

phyical science
so is it 1.25*(2/3)=.83 then .83+1.1=1.93 1.93/8=.2416
September 3, 2010

phyical science
On a particular day, the following appliances are used for the times indicated: coffee maker, 40 min, and microwave oven, 23 min. Using the power requirements given in the table below, find how much it costs to use the appliances at an electrical cost of 8¢ per kWh. ...
September 3, 2010

science
A microwave oven has a power requirement of 1235 W. A frozen dinner requires 6.0 min to heat on full power. (a) How much electrical energy (in kWh) is used? b) If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner?
September 3, 2010

science
On a particular day, the following appliances are used for the times indicated: coffee maker, 40 min, and microwave oven, 23 min. Using the power requirements given in the table below, find how much it costs to use the appliances at an electrical cost of 8¢ per kWh. ...
September 3, 2010

science
A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter?
September 3, 2010

Physics
A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter?
September 3, 2010

science
is it 6.2/0.41
September 3, 2010

science
A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter?
September 3, 2010

science
is this correct 9.8*3.7*2.7=97.90
September 3, 2010

science
How much work is required to lift a 3.7-kg concrete block to a height of 2.7 m?
September 3, 2010

science
While rearranging a dorm room, a student does 292 J of work in moving a desk 3.7 m. What was the magnitude of the applied horizontal force?
September 3, 2010

science
79n
September 3, 2010

science
so is it 1080.4
September 3, 2010

science
While rearranging a dorm room, a student does 292 J of work in moving a desk 3.7 m. What was the magnitude of the applied horizontal force?
September 3, 2010

physics
A microwave oven has a power requirement of 1235 W. A frozen dinner requires 6.0 min to heat on full power. (a) How much electrical energy (in kWh) is used? 1 kWh (b) If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner? 2¢
September 3, 2010

physics
What is the kinetic energy of a 26 kg dog that is running at a speed of 8.4 m/s (about 19 mi/h)?
September 3, 2010

chemistry
The price of a ream of paper is $3.30. There are 500 sheets of paper in a ream. If a sheet of paper weighs 0.500 oz, what is the price of a kg of paper (in dollars, do not include units, round to two decimal places)? What is the cost of one sheet of paper (in dollars, do not ...
September 2, 2010

Intermediate Algebra
2ax+4bx-3ay-6by
September 1, 2010

biochemistry
Is anybody know what is DESTINEDTAFAIL ?
August 30, 2010

Psychology
Write a 200-300 word response, considering how employers and fellow team members might use this instrument at work. Is this test reliable?Is it valid? What are the potential benefits and drawbacks of a test that attemps to measure skills, abilities, or traits. Can someone ...
August 30, 2010

chem
What volume of 17% NaCl solution will provide 27 grams of NaCl?
August 29, 2010

geometry
The coordinates for points C and R are (-1, 4) and (6, 4), respectively. RS and CD intersect at P (3, 2)
August 26, 2010

College Math
L= 60m W= 30m
August 25, 2010

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