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December 20, 2014

Posts by james


Total # Posts: 1,894

Physics
With speed 75m/s and period 5.42ms, calculate the wavelength.
April 9, 2010

chemistry
what is the pressure exerted by a 0.500 mol sample of nitrogen in a 10.0 L container at 20 degrees C?
April 8, 2010

chemistry
once i have the amount of mols of sucrose present how do i convert that to sucrose? and to kj and grams? lets say i have 0.03110 mols of sucrose
April 7, 2010

chemistry
if 32kj of energy results in an average weight gain of 1 g of body mass, then how much weight could a person gain after eating 1 cookie. use dimensional analysis mass of 15.21g of a cookie.
April 7, 2010

chemistry
does not at all say. thats all that is provided. it just sais use dimensional analysis to solve this question. i have a 95% average in this class so far and iam completely puzzled. this is a bonus question on a lab.
April 7, 2010

chemistry
if 32kj of energy results in an average weight gain of 1 g of body mass, then how much weight could a person gain after eating 1 cookie. mass of 15.21g of a cookie.
April 7, 2010

Algebra
No worries, Thank you
April 7, 2010

Algebra
it's f to the power of -1, then i think it's called composite f. Like you know when you get the problems fog of gof? it's like that except fof and the first f is raise to -1 power. Thanks
April 7, 2010

Algebra
using f(x)=4x-5, find f^-1 o f
April 7, 2010

Inorganic Chemistry
In the molecular compound [Co(NH3)3(DMF)](NO3)3 what is the mode of bonding in which DMF is preferred?
April 7, 2010

Inorganic Chemistry
In the molecular compound [Co(NH3)3(DMF)](NO3)3 what is the mode in which DMF is preferred?
April 7, 2010

College Chemistry
Would i take the n into consideration?? This has to do with quantom numbers by the way.
April 6, 2010

College Chemistry
How many orbitals have the following quantum numbers: n=6, l=2, ml=-2?? a. 0, b. 5, c. 7, d. 10, e.6 Since only one can include n=6 in its equation would it make it just one orbital having those numbers? im also thinking that there might be other orbitals that have these ...
April 6, 2010

XECO 212
I would for you to point me in the direction.
April 6, 2010

Business
How did U.S. manufacturers become vulnerable to offshore outsourcing? What are some of the operations management practices that can help bring manufacturing back to the U.S? How can a focus on quality improve manufacturing? How can lean manufacturing and near-sourcing help a ...
April 5, 2010

physics
how do i solve this, i tried dividing the mass by the height, but its wrong A 407-kg pile driver is raised 15 m above ground. (a) How much work must be done to raise the pile driver?__kj (b) How much work does gravity do on the driver as it is raised?__kj (c) The driver is now...
April 4, 2010

College Chemistry
Thank you i appreciate it.
March 30, 2010

College Chemistry
Part a: What mass of solid CuCL2 is required to prepare 450.0mL of 0.125M CuCl2 solution?? Part B: What are the concentrations of Cu +2 ions and Cl- ions in the above solutions. I understand part a, and got the right answer. i need help understanding part b.
March 30, 2010

calc-kinematics
if a particle moves along a line so that at time t where t [0,pi] its position is given by s(t)=-4cost-t^2/2+10 what is the velocity of the particle when its acceleration is zero? so i found v(t) = 4sint-t a(t)=4cost-1 = 0 solved for t plugged it into v(t) and i got the wrong ...
March 30, 2010

calc-related rates
"The volume of a cone of radius r and height h is given by V=1/2(pi)(r^2)(h)If the radius and the height both increase at a constant rate of .5 cm per second at WHAT RATE in cubic cm per second, is the volume increasing when the height is 9 cm and the radus is 6 cm" ...
March 30, 2010

Chemistry
When solving using the quadratic equation, I get two possible values. Which one do I use? Both are positive.
March 29, 2010

Chemistry
What is the pH of a 0.0054 molar solution of Oxalic Acid. K1= 6.5E-2, K2= 6.1E-5? Here's what I have so far for K1: 6.5E-2 = (x)(x)/ (x-0.0054) x= 0.0059 pH = -log(0.0059) = 2.23 K2 is pretty much the same, but I have to work it out. 6.1E-5 = (x)(x + 0.0059)/ (x-0.0059) x...
March 29, 2010

calc
how to find the integral of this function x^2 * root(x^3+1)
March 28, 2010

calc
how do i find the derivative of........ (sinx) ^2-(cosx) ^2 i put it into my t-89 and got -4sinxcosx butthats not a multiple choice. can someone tel me how to do this by hand?
March 28, 2010

chemistry
Choose all of the following statements about the equilibrium constant K that are true: (a) If the K value for a reaction is > 1 then Go must be negative for this reaction (b) A large value for K implies there is a strong driver for the reaction to proceed in the forward ...
March 28, 2010

Math
What is 563 divided by 4 show you work
March 25, 2010

grammar
preschool ivite pablo on thursdays.
March 25, 2010

Chemistry
I'm not real sure about the K1 expressions. Is this correct? C2H2O4 --> H+ + C2O4H- K1 = (x + 0.0054)(x + 0.0054)/ (0.0054-x) Solve for x then repeat for K2
March 24, 2010

Chemistry
What is the pH of a 0.0054 molal solution of C2H2O4. First ionization constant K1= 6.5 x 10-2, second K2= 6.1 x 10-5.
March 24, 2010

Chemistry
Is the answer 0.211 mg/L PbF2?
March 24, 2010

Chemistry
If PbF2 is poured into a solution of 0.012 molar F-, how much will dissolve at equilibrium?
March 24, 2010

physics
wait but kqq/r2 is the equation for a force not an energy
March 23, 2010

physics
An alpha particle approaches a uranium nucleus as 1e6 m/s what is the closest this particle will get to the nucleus how do you set this problem up? thanks!
March 23, 2010

Chemistry
when dissolved in an aqeous solution, which of the following salts will yield an acidic solution? NH4Cl, NaClO4, Na2S, MgBr2, Ba(CH3CO2)2
March 22, 2010

English
I have no idea, I cannot think clearly at all today. I wouldn't even know where to start, even though I know what an analogy is.
March 20, 2010

PHYSICS PLEASE HELP!
Suppose an electron is released from rest in a uniform electric field whose magnitude is 4.70 103 N/C. (a)How much work is done by the field in moving the electron through a distance of 7 cm? J (b) Through what potential difference will it have passed after moving through this...
March 17, 2010

PHYSICS PLEASE HELP!
(a)How much work is done by the field in moving the electron through a distance of 7 cm? J (b) Through what potential difference will it have passed after moving through this distance? V (c) How fast will the electron be moving after it has traveled this distance? m/s
March 17, 2010

chemistry
Thank you!
March 16, 2010

chemistry
So how would I put AgNO3 in the equation? That part kind of confuses me.
March 16, 2010

chemistry
The traditional method of analyzing the amount of chloride ion present in a sample was to dissolve the sample in water and then slowly add a solution of silver nitrate. Silver chloride is very insoluble in water, and by adding a slight excess of silver nitrate, it is possible ...
March 16, 2010

Chemistry
There was a typo on the problem. and cobalt was never meant to be used. It should have read copper which went along with previous questions. Hence, everyone's confusion. Thanks
March 16, 2010

Chemistry
Determine the moles of ammonia in the following cobalt ammine complex: A sample of .1500 g of the cobalt ammine complex is places in a flask and 25.00mL of .200M HCL is added. a few drops of bromocresol green is added and the titration with .100M to NaOH required 16.42mL. I ...
March 16, 2010

7th grade
Transmission
March 15, 2010

college Psychology
I am having trouble describing the interaction (How does effect of one Independent variable depend on level of other independent variable and why?) My 1st independent variable is Type of Stimulus: with 2 levels pictures and words. My 2nd independent variable is Type of Content...
March 14, 2010

Accounting
a 10 year zero coupon bond that yield 5% is issued with a 1000 par value. w hat is the issuance price of the bond
March 8, 2010

french
how would you say a 'model village'?
March 7, 2010

french
how would you say 'a minster' not a minister
March 7, 2010

french
thankyou
March 7, 2010

french
how would you say 'it's a market town'?
March 7, 2010

Investments Analysis
Can anyone help with ANY of these? Any good starting points would be great! Alpha (STI) 0.90 2008 Return(STI) 15% Beta(STI) 1.20 2008 Return(INX) 10% R_squared 36% Risk Free Rate 4% Variance(STI) .1296 b. What is the relative volatility (variability) of STI returns to INX ...
March 6, 2010

arithmetic
what is 11/4,4/7 and 10/21 in the simplest form i tried adding divide not coming with the right answer
March 3, 2010

math
how to simplify 15/60 in a fraction
March 3, 2010

spanish
Islam ich bien im
March 2, 2010

spanish
Que mama sorté quou
March 2, 2010

Chemistry
For the equilibrium below at 400 K, Kc = 7.0. Br2(g) + Cl2(g) reverse reaction arrow 2 BrCl(g) If 0.90 mol of Br2 and 0.90 mol Cl2 are introduced into a 1.0 L container at 400. K, what will be the equilibrium concentration of BrCl?
March 2, 2010

chemistry
HCl + Zn --> Predict the products and decide if it occurs. I have the activity series, but there's only H2 on there, not H.
February 28, 2010

maths
what is 8% p.a on $11000 over 3 years compounding anually
February 28, 2010

Chemistry
In one experiment, 50.0ml of 0.10M CH3NH2, is mixed with 20.00ml of 0.10 M CH3NH3Cl. The kb of CH3NH2 is 3.70*10^-4. a) write the chemical reaction for the equilibrium which becomes established, using H2O as a reactant. b)Write the net-ionic equation that occurs when Ba(OH)2 ...
February 27, 2010

earths core
what are a few (1 or two) reasons why the core cant be of lonestones?
February 23, 2010

science
was their any changes to the ocean since 10 million years ago?
February 23, 2010

Social Studies
What were the conditions of the mines during the Industrial Reolution? Why did so many women want to work in the mines without clothing and have heavy belts around their waists and chains between their legs?
February 22, 2010

us history
Write an Essay about the different perspectives that a chinese native and a christian missionary might have had on the Boxers rebellion
February 22, 2010

pre-calc
Find a vector perpendicular to the plane containing the given points. (0,-2,2), (1,2,-3), and (4,0,-1) My teacher was unable to finish the lesson, but I'd like to know how to solve this problem.
February 17, 2010

Physics
NOt rude at all. Just wants to see some effort from the poster. Although, if it's their first time posting they may not know that. The person who posted should just repost saying, "I tried this," or "I'm not sure what this means, but does it have to do ...
February 17, 2010

lotions
what kind of moisturizers will melt faster overtime ?
February 15, 2010

Global History
How did transportation improved during the Industrial Revolution?
February 15, 2010

how to..
how to answer this question ? describe how someone could improve the following areas of fitness in the pool. 1.cardio cascular, 2.muscle strength, 3.muscular endurance. what does this mean ? how do i answer this?
February 13, 2010

Science
125 mL of water at 10 C is poured onto a 500 g block of ice at -35 C. Assuming it is a perfectly insulated container, what will be the final temperature of the mixture?
February 10, 2010

business studies
how does the sale of fixed assets and retained earnings help in raisihg business finance
February 8, 2010

physics
A diver springs upward from a board that is three meters above the water. At the instant she contacts the water her speed is 9.10 m/s and her body makes an angle of 77.0° with respect to the horizontal surface of the water. Determine her initial velocity, both magnitude ...
February 7, 2010

physics
An airplane is flying with a velocity of 224 m/s at an angle of 30.0° with the horizontal, as the drawing shows. When the altitude of the plane is 2.1 km, a flare is released from the plane. The flare hits the target on the ground. What is the angle?
February 7, 2010

Calc
let f be the function whose graph goes through the point (3,6) whose derivatie is given by f'(x) =(1+e^x)/(x^2) 1. write an equation of a line tangent to the graph at x=3 and use it to approximate f(3.1) --- I GOT : y= (1+e^3)/(9) (.1) +6 i dont know if it is right i dont ...
February 7, 2010

college
A 14-year zero-coupon bond was issued with a $1000 par value to yield 12%. What is the approximate market value of the bond?
February 6, 2010

Hydraulics
A cylinder with a 3" bore and a stroke of 16" receives 18 gpm. What is the piston rod velocity?
February 1, 2010

Mays Middle
Math-The low temperature for 6 consecutive days in Montana city were 9, 3, 4, 16, 11, and 5 degrees. What would the low temperature have to be on the seventh day to have a meanh low temperature of 9 degrees for the week?
February 1, 2010

microeconomics
Suppose a production possibilities frontier can be expressed as + = 9. The opportunity cost of going from 0 units of X to 1 unit of X is
January 31, 2010

College Physics 1
A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
January 31, 2010

College Physics 1
A drag racer, starting from rest, speeds up for 402 m with an acceleration of +24.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.40 m/s2. How fast is the racer moving 3.75 102 m after the parachute opens
January 31, 2010

Physics
If a pronghorn antelope accelerates from rest in a straight line with a constant acceleration of 1.4m/s^2, how long does it take for the antelope to reach a speed of 23m/s? ____s
January 29, 2010

Physics
A particle experiences a constant acceleration that is north at 100m/s^2. At t=0, its velocity vector is 70m/s east. At what time will the magnitude of the velocity be 100m/s? ____s
January 29, 2010

Physics
An engine pulls a train of 20 frieght cars each having a mass of 5.0*10^4 kg with a constant force. The cars move from rest to a speed of 4.5 m/s in 19.7s on a straight track. Neglecting friction, the force with which the tenth car pulls the eleventh one (at the middle ofthe ...
January 29, 2010

Physics
A man lifts a 1.0 kg stone vertically with his hand at a constant upward acceleration of 1.8m/2^2. what is the magnitude of the total force of the stone on teh man's hand? In Newtons downward?
January 29, 2010

holocaust
How were Jews viewed in the United States in the pre-WWII era?
January 27, 2010

math
A hill is inclined at 18 degrees to the horizontal. If the base of the hill is at sea level, find my height above sea level if i walk 1.2 km up the hill
January 25, 2010

physics
In the Millikan oil drop experiment, an atomizer (a sprayer with a fine nozzle) is used to introduce many tiny droplets of oil between two oppositely charged parallel metal plates. Some of the droplets pick up one or more excess electrons. The charge on the plates is adjusted ...
January 24, 2010

10th grade english
A __________ sets up one's argument and provides a basis from which one will build his or her essay.
January 23, 2010

world issues
Canada has developed in many ways since Wrold War 1. From that time to the present, what do u think are the three greatest accomplishments achievements or improvments Canada has seen? why? give specific reasons for your choices. I need this help because i dont know what to ...
January 21, 2010

dante's inferno
seriously?
January 19, 2010

dante's inferno
What does Dante say will heal all light which was dim?
January 19, 2010

statistics
The weights of pineapples grown are approximately normally distributed with a standard deviation of 2.5 and mean of 31 ounces. Suppose a single pineapple is selected at random. a. If a single pineapple is selected at random, what is the approximate probability that it weighs ...
January 18, 2010

6 grade math
Two dice are rolled. Find the odds in favor of a sum of 6.
January 18, 2010

algebra
6-5*8+2^3
January 15, 2010

math
Lines 1 and 2 are parallel. If 5 = 116°, what is the measure of 4?
January 12, 2010

Pre-Cal
Solve 5sinx=-4cosx for 0 less than or equal to x <2pi answers to nearest hunderth of a radian
January 10, 2010

Pre-Cal
Nancy and Harry are lifting a stone statue and moving it to a new location in their garden. Nancy is pushing the statue with a force of 120 newtons(N) at a 60 degree angle with the horizontal while Harry is pulling the statue with a force of 180 newtons at a 40 degree andgle ...
January 10, 2010

Physics-lunar
they gave us a diagram of the moon chart like at waxing waning stuff like that and then the question,... At what time will a full moon rise? Please enter military time in whole hours, ex. 15 for 3 pm.
January 8, 2010

Physics-lunar
At what time will a full moon rise? Please enter military time in whole hours, ex. 15 for 3 pm.
January 8, 2010

Systems operations management
answer for both
January 5, 2010

microeconomics 3
. As tradition has it, Santa Claus is coming on the 5th of December from Spain to the Netherlands to bring gifts to Dutch children. Help is needed to distribute the gifts for which the Santa Claus committee is hiring helpers, so-called Zwarte Pieten. There are two types of ...
January 3, 2010

Pre-Cal
Hi, can someone please solve this step-by-step for me? I really don't get it... Directions: Use the quadratic formula to solve the equation in the interval [0,2PI). Then use a graphing utility to approximate the angle x. 4cos^2x-4cosx-1=0 thanks.
January 1, 2010

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