Monday
February 8, 2016

# Posts by Amanda

Total # Posts: 2,359

chemistry
Consider the following entities: Ar, SiH3F, Xe and CClF3. which one will diffuse the fastest?what is rms speed (m/s) of the slowest moving atom at 25 C..?
November 28, 2011

physics
A 140 kg sleigh is pulled by one horse at a constant velocity for a distance of 0.90 km on a level snowy surface. The coefficient of kinetic friction between the sleigh runners and the snow is 0.25. what is the work done by force? what is work done by friction?
November 23, 2011

phyiscs!
Having landed on a newly discovered planet, an astronaut sets up a simple pendulum of length 1.51 m and finds that it makes 291 complete oscillations in 697 s. The amplitude of the oscillations is very small compared to the pendulum’s length. What is the gravitational ...
November 16, 2011

pre algebra
USE MULTIPLYING BY 1 TO FIND AN EXPRESSION EQUIVALENT TO 8/5 WITH A DENOMINATOR OF 5A
November 16, 2011

Biochemistry (BCMB)
why do plants already have ATP and NADPH for chemical energy from lights reactions of photosynthesis but they still go on to manufacture energy-rich sugars?
November 15, 2011

algebra
A 4m by 6m rug covers half of the floor area of a room and leaves a uniform strip of bare floor around the edges. What are the dimensions of the room?
November 14, 2011

media and the culture
Thank you so much for your help. I don't know why I should of taken one step at a time. Maybe I'm just in a hurry to get this assignment done. Once again, thank you for your help.
November 13, 2011

media and the culture
I don't understand the question and where to start. I'm so confused and overwhelmed with the question.
November 13, 2011

media and the culture
Write a 500- to 550-word essay response for Part Two. Comprehensive writing skills must be used. Explain the effect of relationships among television, movies, and electronic games with culture. Include the following: • How culture is reflected in movies and television &#...
November 13, 2011

I agree also. The answer is A.
November 7, 2011

physics
A 0.060-kg handball is thrown straight toward a wall with a speed of 9 m/s. It rebounds straight backward at a speed of 6.7 m/s (a) What impulse is exerted on the wall? magnitude 0.942 kg·m/s (b) If the ball is in contact with the wall for 3.0 ms, what average force is ...
November 7, 2011

Social studies
Im not really sure what the social and economic effects on industrial revolution are?
November 4, 2011

Social studies
Write a paragraph explaining the social and economic effects of an industrial revolution.
November 4, 2011

Chemistry
Dissolving one mole of salt in water yields two moles of ions. A:NH4[Pt(NH3)Cl3] B: tris(ethylenediamine)cobalt(III) sulfate C: tetraaquadichloronickel(IV) chloride D: [Co(NH3)2(en)Cl2]Cl E: [Co(en)2Cl2]Br F: sodium hexacyanoferrate(II) None of these compounds
November 4, 2011

Chemistry
Okay so I kinda understand where to put the numbers into the formula but i'm not sure how to calculate the distance so could someone kindly walk me through the problem so i can understand it. Thank you so much. Calculate the amount of energy required for the formation of ...
November 3, 2011

Programing
write a pseudocode for a program that asks for the Employee ID, the hours worked and the pay rate, then returns the employee's gross pay for the week?
November 3, 2011

chemistry
What is the maximum amount of ethanol (in grams) that can be produced when 1.0 kg of ethylene (C2H4) and 0.014 kg of steam are placed into the reaction vessel? Ethanol (C2H5OH) is synthesized for industrial use by the following reaction, carried out at very high pressure. C2H4...
November 1, 2011

chemistry
Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a comma. Equation 7.1: ...
October 31, 2011

College Chemistry
One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume of 30.6 L. When one mole of H2O(g) is condensed to one mole of H2O(l) at 1.00 atm and 100.°C, 40.66 kJ of heat is released. If the density of H2O(l) at this temperature and pressure is 0.996 g/cm3, calculate &...
October 31, 2011

College Chemistry
As a system increases in volume, it absorbs 52.5 J of energy in the form of heat from the surroundings. The piston is working against a pressure of 0.500 atm. The final volume of the system is 58.0 L. What was the initial volume of the system if the internal energy of the ...
October 31, 2011

College Chemistry
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 50. cm3. If the combustion of this mixture releases 955 J of energy, to what volume will the gases expand against a constant pressure of 675 torr if all the energy of combustion is...
October 31, 2011

Chemistry
Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a comma. Equation 7.1: ...
October 31, 2011

Physics
At the beginning of a new school term, a student moves a box of books by attaching a rope to the box and pulling with a force of F = 84.4 N at an angle of 64degrees. The acceleration of gravity is 9.8 m/s/s. The box of books has a mass of 14 kg and the coefficient of kinetic ...
October 30, 2011

Education 301
I need to complete an assignment for edu 301 and I am completely lost. Can anyone help me get started? Create a flowchart, in which you create an organizational structure for the education system for the federal, state, district, and school levels. I have researched flowcharts...
October 29, 2011

Chemistry
Bond angles will be 90, 120, and 180 due to the seesaw shape created by the lone pair of electrons.
October 28, 2011

science
frontier ethic.
October 28, 2011

A roller coaster cart with a mass of 13 kg travels around two frictionless, circular loops. It just barely makes it around the top of the first circular loop which has a radius of 24 meters. It then travels around the other loop with a radius of 14 meters. What is the normal ...
October 27, 2011

A mass of 6 kg is tied to a 2 meter long rope and is swung in a vertical circle. At the bottom of the circle, the mass is moving at a speed of 16 m/s. What is the tension, in Newtons, in the rope after the mass has traveled to a point exactly halfway between the top and bottom...
October 27, 2011

An object with a mass of 13 kg slides 5 meters across a horizontal surface with a coefficient of kinetic friction of 0.38. For the duration of the slide an external force, F1, acts on the mass in the positive y direction while another force, F2, has a magnitude of 67 Newtons ...
October 27, 2011

An object with a mass of 3.7 kg slides in the positive x direction across a horizontal surface with a coefficient of kinetic friction of 0.24. During its slide a force of 364 Newtons acts on it in the positive x direction while a force of 44 Newtons acts on it in the negative ...
October 27, 2011

On some planet with a radius of 8,553 km and a mass of 5.55 x 1024 kg the planet is spinning so fast such that anything at the equator will fly off of the planet. What is the planet's period (length of a day on the planet) in hours? Please help me solve !
October 27, 2011

Natural science
What might happen to earth if the temperature in the atmosphere rises by 5degrees and if the water in the ocean gets colder?
October 26, 2011

algebra
twenty times the cost of a record, increased by eighty-nine cents
October 26, 2011

A mass of 30 kg lies on a horizontal surface with a coefficient of static friction of 0.72 and a coefficient of kinetic friction of 0.31. If a force of 25.1 Newtons is applied parallel to the surface (+x direction if you prefer), what is the magnitude of the acceleration of ...
October 25, 2011

A mass of 17 kg lies on a horizontal surface with a coefficient of static friction of 0.54 and a coefficient of kinetic friction of 0.22. If a force, F, is applied parallel to the surface (+x direction if you prefer), what is the magnitude that F needs to be to begin to move ...
October 25, 2011

A 21 kg object is placed on an incline with friction. The incline is raised slowly from zero degrees and at 60.71 degrees, the object begins to slide down the incline. What is the coefficient of static friction? Be as accurate as possible with your answer and be sure to enter ...
October 25, 2011

A 21 kg object is placed on an incline with friction. The incline is raised slowly from zero degrees and at 60.71 degrees, the object begins to slide down the incline. What is the coefficient of static friction? Be as accurate as possible with your answer and be sure to enter ...
October 25, 2011

medical billing and coding
you are a medical office manager who wants to make the cofing process easier for employees to understand. to facilitate better understnading of this process, respond to the following: come up with buzzwords or slogans that would best describe the three CPT code categories. ...
October 25, 2011

A mass of m1 = 12 kg is placed on an incline with an inclination angle of 50 degrees, a coefficient of kinetic friction of 0.16, and a coefficient of static friction of 0.89. m1 is tied to a rope which runs parallel to the incline and runs over a pulley to a hanging mass of m2...
October 21, 2011

Physics.
A mass of m1 = 12 kg is placed on an incline with an inclination angle of 50 degrees, a coefficient of kinetic friction of 0.16, and a coefficient of static friction of 0.89. m1 is tied to a rope which runs parallel to the incline and runs over a pulley to a hanging mass of m2...
October 21, 2011

That is not right drwls
October 20, 2011

physics
A 0.82 kg physics book with dimensions of 32.4 cm by 20.1 cm is on a table. What force does the book apply to the table? Answer in units of N
October 20, 2011

physics
Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 74 kg student to accelerate downward at 9.8 m/s2, determine the upward acceleration of the Earth during the student’s fall. Answer in units of m/s2
October 20, 2011

physics
A 53.5 N object is in free fall. What is the magnitude of the net force which acts on the object? Answer in units of N What is the magnitude of the net force when the object encounters 15.4 N of air resistance? Answer in units of N What is the magnitude of the net force when ...
October 20, 2011

physics
A certain spring stretches 4.6 cm when it supports a mass of 0.55 kg . If the elastic limit is not reached, how far will it stretch when it supports amass of 8 kg ? Answer in units of cm
October 20, 2011

algebra
The length of the base of an isosceles triangle is one fourth the length of one of its legs. If the perimeter of the triangle is 16 inches, what is the length of the base?
October 16, 2011

chemistry
Acetylene gas, c2h2, burns in oxygen to produce carbon dioxide and water. If 61.4 g of co2 are produced when 22.7g c2h2 react with sufficient oxygen, what is the percent yield for the reaction?
October 14, 2011

CHEmistry
The balanced reaction equation for combustion of Mg is: 2 Mg + O2 --> 2 MgO. In the reaction vessel you have 1.0 moles of Mg and 0.30 moles of O2. What is the limiting reactant? How many moles of MgO can you possibley make?
October 9, 2011

math
Bethany has 40 apples. Write a subtraction story about the apples that would require regrouping. Then write the answer in a complete sentence.
October 4, 2011

physics
A stone falls from a cliff. It lands on the ground below the cliff after 4.2 seconds. The height of the cliff can be calculated to be what?
October 4, 2011

physics
In the equation y squaared minus 1/4 g squared t cubed, y is the displacement, t is the time, and g is the gravitational acceleration. The right hand side of the equation has units of?
October 4, 2011

physics
a rectangular barge with a flat bottom, has an area at the bottom of 4m squared. the weight of the barge plus its cargo is 5,000 newtons. what is the mass of the barge + cargo in kilograms?
October 4, 2011

economics
An increase in personal income tax rates will cause a(n)
October 3, 2011

Pre-Calculus
A rectangle is bounded by the x-axis and the semicircle y = √36 – x2, as shown in the figure below. Write the area A of the rectangle as a function of x, and determine the domain of the area function. A = all real numbers except x = 36 all real numbers except x = 6 ...
October 2, 2011

Math- Probability
in a recent year, 281 of the 290,789,000 people in the U.S. were struck by lightning. estimate the probability that a randomly selected person in the U.S would be struck by lightning this year.
October 2, 2011

CHEM
Calculate G° for each reaction using G°f values. MnO2(s) + 2 CO(g) Mn(s) + 2 CO2(g)
September 29, 2011

Chemistry
Calculate G° for each reaction using G°f values. MnO2(s) + 2 CO(g) Mn(s) + 2 CO2(g)
September 29, 2011

physics
A plane flying horizontally at a constant velocity drops a bomb on a cave from a height of 500 m. At the moment the bomb hits the ground, the plane is A.) 250 meters beyond the cave B.) Directly over the cave C.) 250 meters from the cave D.) Some other wild guess
September 28, 2011

Social Study
What kind of qualities does virgina colony have
September 28, 2011

Algebra
determine whether the ordered pair (1,10) is on the graph of the following equation Y=√x + 9
September 24, 2011

Algebra
find the intercepts and graph the equation by plotting points. Y=2-2x^2
September 24, 2011

Computer Science
Suppose that a String variable str has already been defined and holds some String. In the box provided below, write a statement that changes str to all lower case characters, and then copies the result back to str.
September 22, 2011

cultural diversity
September 20, 2011

spelling
verbs, the telling part or what is happening part of a sentance
September 20, 2011

writing( short story)
can u give me another example in my writing?
September 18, 2011

writing( short story)
Can you proofread? I need some figurative language. The word limit is 750-1500 words. “Don’t go in that room,” screamed Kayla and her best friend Rebecca at the top of their lungs while watching the movie, “Martha's End.” Kayla’s mother, Tina...
September 18, 2011

Algebra
Let A(4,3) B(5,8) and C(3,10) be three points in a coordinate plane. Find the coordinates of a point D such that the points ABC and D form a parallelogram with (a)AB as one of the diagonals (b)AC as one of the diagonals (c)BC as one of the diagonals
September 18, 2011

Algebra
Find X such that the point (X, 8) is 13 units from (7, -4)
September 18, 2011

Algebra
Identify the triangle PQR as isosceles ( two sides equal length) equilateral (three sides of equal length) a right triangle, or a scalene triangle (three sides of different length)
September 18, 2011

Algebra
Find distance between the two points and the midpoint of the line segment joining them (-1,1)and (-3,-2)
September 18, 2011

Science
balance equation for lead(II) nitrate and sulfuric acid a) coefficients should be in terms of lowest whole numbers. represent substances in solutions as ions if the substances are extensively ionized
September 18, 2011

math
The diagram is 4 toothpicks each to from 3 boxes.
September 18, 2011

math
Take away 1 toothpick, move some others, and leave 1. I don't get it.
September 18, 2011

Algebra
The markup over dealer's cost of a new car ranges from 18% to 24%. If the sticker price is \$14000 over what range will the dealer's cost vary?
September 18, 2011

Com/155
How do I come up with a good topic sentence to explain how the purpose, audience,tone, and content impact academic writing?
September 16, 2011

Chemistry
Simplify the following expressions. 15. 5 (5w-4w)/10 17. 6a X 5b^2/3a^3 20. (4f + 13g) (2w)
September 12, 2011

Phyics - Astronomy
You are standing at a latitude of 35 degrees South. Star x is currently at an azimuth of 45 degrees and an altitude of 50 degrees. What is the azimuth and altitude coordinates of Star X 3 hours later? I don't know how to do this. If anyone knows how to calculate this ...
September 11, 2011

Math
September 7, 2011

Physics
a novice pilot sets a plane's controls, thinking the plane will fly at 2.5X10^2 km/h to the north. if the wind blows at 75 km/h toward the southeast, what is the planes's resultant velocity?
September 5, 2011

english
I'm doing a project that I must compare a book I've read to 1 or 2 songs. I've read the Alex Cross series by James Patterson(Cat&Mouse) and thought that Tupac would be a good comparison but I'm having trouble with what song(s) would work.
September 4, 2011

Physics
I have it graphed out, and I got the displacement in km, but I can't quite get the direction and the average velocity
September 4, 2011

Physics
Peggy drives from Cornwall to Atkins Glen in 35 min. Cornwall is 73.4 km from Illium in a direction 24° west of south. Atkins Glen is 25.1 km from Illium in a direction 13° south of west. Use Illium as your origin. (a) Draw the initial and final position vectors. (Do ...
September 4, 2011

government
none of them really helped :/
September 2, 2011

government
what is the congress doing to reduce the national deficit in the next few months?
September 2, 2011

government
what does reducing the national deficit even mean ?
September 2, 2011

government
help peopleeeeeeeeeeeeeee
August 31, 2011

government
August 31, 2011

government
information about the Congressional committee that will be working on reducing the national deficit in the next few months
August 31, 2011

Calculus
A parcel delivery service will deliver a package only if the length plus girth (distance around) does not exceed 84 in. What are the radius, length and volume of the largest cylindrical package that may be sent using this service?
August 27, 2011

Calculus
A man 5.50 ft tall approaches a street light 18.0 ft above the ground at a rate of 4.0 ft/s. at what rate is the end of the man's shadow moving when he is 9.0 ft from the base of the light?
August 27, 2011

Chemistry
bobpursley just to let you know I already know that number 1,2,3,4,6,8,12,15,and 18 right. I took the test and it tells me what ones I got right and what one I got wrong. So maybe it is you who successfully missed them all.... Not to be mean but I do know some things...
August 26, 2011

Chemistry
Can somebody check my answers 1. If a small piece of sodium is dropped into water, it begins to react, forming hydrogen gas and sodium hydroxide. In the equation, 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g), the sodium hydroxide that is formed is a A. compound in solution. ...
August 26, 2011

Chemistry
Can somebody check my answers? I Failed this test one time already. I do not want to fail it again. 1. When a pair of electrons is shared between two atoms, a covalent bond is said to have formed. Most often, the pair is formed A. by excess valence electrons. B. as one atom ...
August 26, 2011

physical science
A lever is used to lift a heavy load. When a 50 N force pushes one end of the lever down 1.2m the load rises .2m. Show the weight of the load is 300N ADVANTAGE of lever is input/output = 1.2/.2 = 6 W=FD W=50N*6 (b/c of advantage) = 300N
August 17, 2011

algebra
Input:1,2,3,4,5 output:3,5,9,17,33 what is the rule?
August 16, 2011

algebra
the diagonal of a rectangular room is 13ft long. one wall measures 7ft longer than the adjacent wall. what are the dimensions of the room
August 2, 2011

chemistry
A 20 gram piece of metal is added to a sample of 100 grams of water inside a calorimeter. If the metal is at a temperature of 125° Celsius and the water is at 20° Celsius, which of the following best describes what will occur inside the calorimeter?
July 29, 2011

SCHOOL
SOLVE USING ADDITION AND MULTIPLICATION PRINCIPLE 6X-7<-25
July 24, 2011

algebra 2
If y varies inversely as x, and y = 12 when x = 6, what is K, the variation constant?
July 23, 2011

statistics
Assume that 90% of the general population is right-handed. Suppose that 100 students are randomly selected. what is the probability that 84% or more is right handed
July 14, 2011