Sunday
November 23, 2014

Posts by harry


Total # Posts: 242

Art... check
Which of the following is a convention Chinese artist Shen Zhou used in his brush paintings? He used only black ink to emphasize expressive brushstrokes. He painted several seated Buddha in the background. He painted flat, realistic figures to reflect strength and calmness. He...
November 15, 2014

Physics
Ohhhh, I was using the radius of the moon as the r instead of the arc length… I feel dumb haha Thank you, Greatly appreciated!!
November 13, 2014

Physics
The diameter of the Moon is 3.78x10^6m. It subtends an angle of .00982 radians at the surface of Earth. How far is the Moon from Earth? (Please explain I can't wrap my head around this question.)
November 13, 2014

7th grade math
consider the inequality 2x+3≤-3. Find the set of all integer solutions of this inequality that are also solutions of the inequality 5x-2<3. Please help I am really confuded
October 22, 2014

math
semir, sarah and sung so decided to raise money for a local homeless shelter by working in a local deli. the deli agreed to donate to the shelter a portion of the profits from each meal the three sold. semir sold 3 times as many meals as sarah. sung sold 2 more meals than ...
October 14, 2014

Science/chemisty
Explain in detail how to prepare 250. mL of a 0.125 M glucose solution. The formula for glucose is C6H12O6.
October 13, 2014

Physics
A horizontal force, F1 = 85 N, and a force, F2 = 18.4 N acting at an angle of θ to the horizontal, are applied to a block of mass m = 2.1 kg. The coefficient of kinetic friction between the block and the surface is μk = 0.2. The block is moving to the right. A. Solve...
October 9, 2014

Trig
Two people decide to find the height of an obelisk. They position themselves 25 feet apart in line with, and on the same side of, the obelisk. If they find that the angles of elevation from the ground where they are standing to the top of the obelisk are 65 degrees and 44 ...
September 10, 2014

Chemistry
Fannie eats a dozen doughnuts every 36 hours. How many doughnut does she eat in a week? I used Dimensional Analysis(which isn't helping at all), but it keeps giving me weird number, like 36 over 2016 or 252 over 2016.
September 1, 2014

Maths
Thanks for all the help, really appreciate it.
August 28, 2014

Maths
A circular lily pond is surrounded by a gravel walkway that is 4 m wide. Calculate the area of the walkway if the pond is 12 m in diameter.
August 28, 2014

Math
A number whose digit in the ten billions place is 5 less than 8
June 18, 2014

Math
:'(
May 23, 2014

Math
What are the solutions of the system? y = x2 + 3x – 4 y = 2x + 2 Don't understand
May 23, 2014

Chemistry
The fluoride ion concentration in a saturated solution of magnesium fluoride, MgF2, is 2.3 10-3 M. Calculate the value for the equilibrium constant.
May 5, 2014

Chemistry
Aniline, C6H5NH2, is a weak base. If the hydroxide ion concentration of a 0.201 M solution is 9.2 10-6 M, what is the ionization constant for the base?
May 5, 2014

Chemistry
Ah got it now thank you!
May 1, 2014

Chemistry
Where does the 6.4 come from? 0.784 = 5 over x then you divide 0.784 by 5? I don't quite understand sorry!
May 1, 2014

Chemistry
Calculate the grams of NaNO3 required to produce 5L of oxygen at STP if the percent yield of the reaction is 78.4%?
May 1, 2014

Chemistry
I am very confused. I tried several practice problems and am not getting them correct.
March 26, 2014

Chemistry
What is the mass if solute dissolved in the indicated volume of each of the following solutions? (b) 4.25 L of 0.450 M KIO4g (c) 60.0 mL of 0.310 M ZnSO4g (d) 60.0 mL of 0.310 M Ni(NO3)2g
March 26, 2014

Chemistry
A hospital saline solution is analyzed to confirm its concentration. A 60.0 mL sample with a mass of 50.443 g is evaporated to dryness. (a) If the solid sodium chloride residue has a mass of 0.413 g, find the mass/mass percent concentration of the NaCl solution. % (b) Find the...
March 26, 2014

Linear Algebra
I need help please!! How many solutions does the system of equations have? 2x=-10y+6 and x+5y=3 a. one b. two c. infinitely many d. none y=4x+3 and y=4x+4 a. one b. two c. infinitely many d. none x-4y=12 and y=1/4x-3 a. one b. two c. infinitely many d. none
March 13, 2014

Chemistry
Ik this has been answered, but doesn't the copper oxide have something to do with it? And could you explain it in simpler terms? I'm just confused because you said forget the copper oxide, but your using it somehow, what puzzles me is the carbon dioxide, because the ...
February 23, 2014

Science
Copper Oxide + Carbon -> Copper + Carbon Dioxide Calculate the mass of carbon needed to obtain 63.5g of copper from 79.5g of Copper Oxide
February 23, 2014

Science
Copper Oxide + Carbon -> Copper + Carbon Dioxide Calculate the mass of carbon needed to obtain 63.5g of copper from 79.5g of Copper Oxide
February 23, 2014

physics
A 475 gram box is given a push and it then slides up and back down a ramp with a 35.0° incline. The coefficient of friction is 0.30. (a) Determine the rate of deceleration as the box slides up the ramp. (b) Determine the rate of acceleration as the box slides back down ...
February 20, 2014

Physics
Find the net force and the acceleration for the situation below. 30N 20N <---------------[ 5.1kg]---------->
February 19, 2014

Chemistry
This answer is not correct
February 14, 2014

Chemistry
A sample of oxygen gas occupies 500.0 mL at -185°C and 75.0 cmHg. Calculate the temperature in °C if the gas has a volume of 221.0 mL at a 55.0 cmHg.
February 14, 2014

Chemistry
A sample of gas has a volume of 1.30 L at STP. What is the temperature in °C if the volume is 13.0 L at 2.00 atm?
February 14, 2014

chemistry
If the surface area of a human body is 16,700 square centimeters, what is the total weight of the atmosphere on a human body expressed in pounds?
February 13, 2014

chemistry
Calculate the final Celsius temperature of sulfur dioxide if 0.500 L of the gas at 35°C and 650 mmHg is heated until the pressure reaches 742 mmHg. Assume the volume remains 0.500 L.
February 13, 2014

Ap chem
Thanks
February 12, 2014

Ap chem
Why does pf3 have dipole dipole internolecular forces? I thought it had dispersion...
February 12, 2014

algebra
Mike needs at least a 75% average to pass his math course. The class contains 5 exams that are equally weighted. If he scored a 64%, 86%, 71%, and a 90% on the first 4 exams, what score does he need on the final exam to earn at least a 75% in the class?
February 2, 2014

Algebra
Martin sold his computer and software for $900.00, receiving three times as much for the computer then the software. What was the selling price of the computer and software?
February 2, 2014

Chemistry
N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to yield 750.0 cm3 of N2O5? The reaction conditions are 350°C and 2.50 atm pressure. 2N2 + 5 O2 = 2N2O5 I balanced correctly. What is my next step to solve this problem. I am confused and I want to understand ...
February 2, 2014

Chemistry
N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to yield 750.0 cm3 of N2O5? The reaction conditions are 350°C and 2.50 atm pressure. I balanced the equation 2N2+2O2 = 2N2O5 BUT I AM NOT GETTING THE CORRECT ANSWER, WHAT AM I DOING WRONG?
February 2, 2014

Chemistry
N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to yield 750.0 cm3 of N2O5? The reaction conditions are 350°C and 2.50 atm pressure. I balanced the equation 2N2+2O2 = 2N2O5 BUT I AM NOT GETTING THE CORRECT ANSWER, WHAT AM I DOING WRONG?
February 2, 2014

Chemistry
N2(g) + O2(g) → N2O5(g) What volume of oxygen gas reacts to yield 750.0 cm3 of N2O5? The reaction conditions are 350°C and 2.50 atm pressure
February 2, 2014

Chemistry
SO2(g) + O2(g) → SO3(g) What volume of sulfur dioxide gas reacts with 15.0 L of O2? The reaction conditions are 875°C and 1.00 atm pressure
February 2, 2014

algebra
The perimeter of a pool is 64 feet and has a width of x and a length of x-4. What is both the width and length of the pool?
January 24, 2014

math
19 cars start a race. in how many ways can the top 3 cars finish
December 14, 2013

physics
A small coin is inside a bowl. The bowl is a surface of revolution of the curve y=100x^4 m^-3. This coin slides around the inside of the bowl at a constant height of y=0.01 m above the bottom of the bowl. What is its angular velocity in rad/s? Accel due to gravity = 9.8 m/s^2
June 24, 2013

please hurry
what is the square root of 0.31428 with explanation.by divison method.
May 20, 2013

Calculus
Find the derivative
May 1, 2013

Calculus
f(x)= e−(5x)⋅cos(3x)
May 1, 2013

calculus
find the solution: (y^(2) dx)/(1-x)=dy
April 11, 2013

calculus
find the solution: e^y=1/(y^'+1)
April 11, 2013

calculus
Find the specified coordinates of the centroid of the area bounded by a) x=3 and 2x=y^2 find the coordinates x and y of the centroid b) y= x^3 and y=4x in the first quadrant. Find the x coordinate of the centroid
April 11, 2013

calculus
Find the coordinates of the centroid of the following volume of revolution formed by rotating the area bounded by y^2-4=-x^2, x=0,x=1, And the "x" axis about the "x" axis.
April 11, 2013

calculus
Find the particular solution of the following differential equation by using the given boundary conditions. y(1+x)=x(y+1)(dy/dx) when y=1 x=1
April 11, 2013

calculus
Find the centroid of 4 particles of equal mass located at (0,0), (4,2), (3,-5), and (-2,-3)
April 11, 2013

Math
please help!!!!Apply newtons method to approximate the x-values of the indicated points of intersection of the 2 graphs. continue the process until 2 successive approximations differ by less than 0.001. (Hint: Let h(x)=f(x)-g(x)) f(x)=x^6 g(x)=cos(x) 1)x= ??? (smaller value) 2...
April 5, 2013

chemistry
enthalpy change^H is +23kJ mol-1 of phosphine (PH3) for the reaction 2P(s)red+3H2(g)---->2PH3(g) a) Calc. entropy change for this reaction. Explain how this information allows you to determine the spontaneity or non-spontaneity of this reaction at any temp (S for PH3 is ...
February 12, 2013

chemistry
a gas sample heated in a cylinder uses 650kJ of heat. a piston that compresses this gas does 800kJ of work. What is the change in internal energy, ^E of the gas during this process?
February 12, 2013

chemistry
list the following substances in order of increasing molar entropy at 25'c. H2O(l), H2O(g), H2O(s), C(s), Ar (g) Explain your reasoning
February 12, 2013

chemistry
the standard free energies of formation of SO2(g) and SO3(g) are -300.4 and -370.4kJ mol-1 respectively. Calculate the value of the equilibrium constant at 25'C for the reaction 2SO2(g)+O2(g)==>2SO3(g)
February 12, 2013

writing
I need help to write a summery for the open univercity please write for me one Thanks
February 7, 2013

science
Which is the higher density of polyethylene, linear or branched? Select the choice with the best accompanying explanation
January 12, 2013

science
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6.97 x ...
January 12, 2013

science
What is the degree of polymerization, n, of polypropylene with a molecular weight of 600,000 g/mole?
January 12, 2013

science
Calculate the surface energy of the (100) surface of niobium. The enthalpy of atomization of niobium is 745 kJ/mole. Express your answer in units of J/cm2.
January 12, 2013

science
What is the pH of 50 mL of a 0.2M glycolic acid aqueous solution after adding 5 mL of 0.25 M KOH? The pKa of glycolic acis is 3.83 at 25 .
January 12, 2013

science
Estimate the Cl-As-F bond angle
January 12, 2013

TO: MS SUE MATH 9
ok :)
December 13, 2012

TO: MS SUE MATH 9
thank you for trying and hopefully its right :)
December 13, 2012

TO: MS SUE MATH 9
The cube of the sum of 5 an 2 is decreased by the square of the product of 6 and 4. Write an expression that models this statement. Then , solve. THANX
December 13, 2012

Math 9 pleese help me thanx
The cube of the sum of 5 an 2 is decreased by the square of the product of 6 and 4. Write an expression that models this statement. Then , solve.
December 13, 2012

Physics
A force of 40 N is required to start a 5 kg box moving across a horizontal concrete floor. (a) What is the coefficient of static friction between the box and the floor? (b) If the 40 N force continues, the box accelerates at 0.70 m/s2. What is the coefficient of kinetic friction?
December 4, 2012

AP chemistry
Liquid butane, C4H10, is stored in cylinders, to be used as a fuel. The normal boiling point of butane is listed as -0.5 C. (a) suppose the tank is standing in the sun and reaches a temperature of 35 C. Would you expect the pressure in the tank to be greater or less than ...
October 28, 2012

ap chemistry help!!!!
Ive been absent from class because of the flu so i don't have a clue how to figure these out! Help! due tomorrow at 12! 1).Suppose that 135 g of ethanol at 23◦C is mixed with 255 g of ethanol at 75◦C at constant atmospheric pressure in a thermally insulated ...
October 24, 2012

Math
Which coins would you use to make $0.28? Write two ways
October 1, 2012

Math
Write the number that is 2 tens more than 53.
October 1, 2012

physics
200 gram cube is moved by a 100 gram water filled Styrofoam cup
September 20, 2012

Math
A pet store has 15 rabbits and 25 cats. How many more cats than rabbits does the store have?
September 19, 2012

Math
Write a4-digit number that has a hundrens digit of 6, a tens digit of 3, and 9 for each of the other digits.
September 19, 2012

college calc
Give a formula for the function illustrated using a vertical shift of an exponential function. The two points marked on the graph are A=(−1,17) and B=(1,2). The red horizontal line is given by y=1, and is a horizontal asymptote of the function. What is the equation?
September 6, 2012

math
y = x2 + 6x
July 26, 2012

math HELP HELP HELP
Hi, I am 12 years experienced tutor and assignment helper for computer science. I am ready to get this assignment done for you but you have to pay fee for it.For further discussion email me at hardeepsp ( at the rate) gmail (dot)com or contact me in skype or gtalk. my skype is...
April 30, 2012

Programming logic
Hi, I am 12 years experienced tutor and assignment helper for computer science. I am ready to get this assignment done for you but you have to pay fee for it.For further discussion email me at hardeepsp ( at the rate) gmail (dot)com or contact me in skype or gtalk. my skype is...
April 30, 2012

python programming
Hi, I am 12 years experienced tutor and assignment helper for computer science. I am ready to get this assignment done for you but you have to pay fee for it.For further discussion email me at hardeepsp ( at the rate) gmail (dot)com or contact me in skype or gtalk. my skype is...
April 29, 2012

programming
Hi, I am 12 years experienced tutor and assignment helper for computer science. I am ready to get this assignment done for you but you have to pay fee for it.For further discussion email me at hardeepsp ( at the rate) gmail (dot)com or contact me in skype or gtalk. my skype is...
April 25, 2012

Math
Find the value of csc Q for angle Q in standard position if the point at (3, –1) lies on its terminal side.
April 10, 2012

c++programming
Hi, I am 12 years experienced tutor and assignment helper for computer science. I am ready to get this assignment done for you but you have to pay fee for it.For further discussion email me at hardeepsp ( at the rate) gmail (dot)com or contact me in skype or gtalk. my skype is...
April 10, 2012

Chemistry
One enzyme- catalyzed reaction in a biochemical cycle has an equilibrium constant (K1) that is 10 times the equilibrium constant (K2) of a second reaction. If the standard Gibbs energy of the former reaction is - 300 kJ mol-1, what is the standard reaction Gibbs energy of the ...
April 10, 2012

phys chem
Calculate the Coulomb potential due to the nuclei at a point in a LiH molecule located 200 pm from the Li nucleus and 150 pm from the H nucleus. just doing exam review and got stuck on just this one, be great if I could get an answer.
April 9, 2012

Science
they could set up a bunjee jump and charge ten bucks for it
April 9, 2012

math
51 one data points with an average of 3.04 meaning you could assume every data point is 3.04. Multiply that by the 51 entries, add 16 to that number then divide by 52
April 9, 2012

Simple Interest
compound or simple intrest? earn 74000 or get account from 45000 to 74000?
April 9, 2012

math
5x2=10 7x2=14 +1 =25?
April 9, 2012

math
ya obviously you could save 82 bucks if you won
April 9, 2012

Chemistry
Uranium-238 has half life of 4.51 * 10^9 years Uranium-234 has half life of 2.48 * 10^5 years Thorium-230 has half life of 8.0 * 10^4 years Radium-226 has half life of 1.62 * 10^3 years Lead-210 has half life of 20.4 years. The rate constant for the decay of unstable nuclide X...
March 20, 2012

Chemistry
What volume will be required to contain a mixture of 0.547 mol of N2 and 0.547 mol of O2 at 1.11 atm and 22.1 degrees celsius?
March 20, 2012

Math
An alien rocketship is traveling at a speed of 2,500,000 feet per minute. At this speed, how many miles will it travel in 1 second? Round to the nearest thousandth.
February 20, 2012

Math
Transform: log3^4= log(3/4)=
February 20, 2012

physics
A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed, 1.84 m/s. What is the average power of the elevator motor during this period? What is the power of the elevator motor during an upward cruise with ...
February 20, 2012

physics
A 67.7 kg person jumps from rest off a 3.11 m-high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.04 m under the surface of the water. Determine the magnitude of the average force that the water exerts on the diver. This ...
February 19, 2012

physics
A basketball player makes a jump shot. The 0.585 kg ball is released at a height of 2.14 m above the floor with a speed of 7.15 m/s. The ball goes through the net 3.10 m above the floor at a speed of 4.19 m/s. What is the work done on the ball by air resistance, a ...
February 19, 2012

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