Tuesday
September 30, 2014

Posts by Jessica


Total # Posts: 2,616

Biology
Thank you
November 24, 2010

Biology
What are the benefits of antibiotic for human being?
November 24, 2010

chemistry
where is 1.155X10^-9 from?
November 23, 2010

chemistry
The Ka of hypochlorous acid (HClO) is 3.0 × 10-8 at 25°C. Calculate the pH of a 0.0385-M hypochlorous acid solution? i got help with this problem, but i dont get where one of the numbers came from (3.4 x 10^-5)??? i tried makeing 3.0 x 10^-8 the x but i still dont ...
November 23, 2010

chemistry
The acid-dissociation constant, Ka, for gallic acid is 4.57 × 10-3. What is the base-dissociation constant, Kb, for gallate ion?
November 23, 2010

chemistry
The pH of a 0.55-M aqueous solution of hypobromous acid, HBrO, at 25°C is 4.48. What is the value of Ka for HBrO? how do you solve for Ka?
November 23, 2010

english 10th
what is a metaphor and hyperbole for the book the Bar Code Rebllion
November 21, 2010

algebra
how do you solve (f+g)(3) let f(x) = x2-2x and g(x)= x-5
November 21, 2010

US History
Evaluate the administrations of Presidents Hayes, Garfield, Arthur, Cleveland, and Harrison in reference to their conceptions of the office and the use of executive power.
November 20, 2010

chemistry
A 47.7-g sample of SrCl2 is dissolved in 112.5 mL of solution. Calculate the molarity of this solution.
November 20, 2010

physics
What is the energy in joules of an x-ray photon with wavelength 8.40*10e-10 m? ____J? (b) Convert the energy to electron volts. ___eV ?
November 19, 2010

Rodriguez
How many grams of CO2 will be produced when 29.0g of C3 H8 reacts with extra O2?
November 19, 2010

Calculus
a farmer has 160 ft of fence and wants a pen to adjoin to the whole side of the 130 ft barn. what should the dimensions be for maximum area?
November 18, 2010

Physics
A 70 kg man just before contact with the ground has a speed of 5 m/s In a stiff-legged landing he comes to a halt in 7ms (miliseconds). Keeping in mind that the average net force acting on the man includes both the force of the ground on the man and the gravity force, find the...
November 18, 2010

physics
what is the symbolic expression for the wavelength ë of a photon in terms of its energy E, Planck's constant h, and the speed of light c.
November 17, 2010

Math
What is the minimum value of the function f(x)= 4x^2+24x+39
November 17, 2010

Algebra
what is the value of k in the equation
November 17, 2010

Algebra
6x^2-11x-10=(3x+2)(2x+k)
November 17, 2010

English
Can you expand more on what you said? sorry..
November 16, 2010

English
Third point: He is from noble family? If I am correct, how does it make him a tragic hero? :/
November 16, 2010

English
How is Hamlet a tragic hero? I have these points 1. tragic flaws 2. he suffered throughout the play 3. ??? I need one more..I can't think of anything... someone help please.
November 16, 2010

Chemistry
If 0.117 mol of argon gas occupies 2.15 L at 725 mmHg, what is the temperature in degrees Celsius? please explain step by step. Thank you so much
November 16, 2010

math
What is the solution of the given equation? 12;8t=96?
November 15, 2010

Business
social dilema, how does I incorporate this. Would this be struggles between emplpyees. that is where i am most confussed on thank you
November 14, 2010

Business
Hiring o Performance evaluations o Discipline o Termination o Diversity o Harassment o Manager as a role model • Write a 1,050- to 1,400-word paper addressing the following points: o Describe the moral and ethical issues faced by managers dealing with your selected topic...
November 14, 2010

science
dormin, i think
November 14, 2010

Physics
As the temperature of an object becomes higher, what happens to the average wavelength of the radiation it emits?
November 13, 2010

Physics
How does the eye adjust the focus of an image on the retina?
November 13, 2010

Physics
A puddle of water (n = 1.33) is covered with a very thin layer of light oil (n = 1.20). What is the minimum thickness the oil in the region that does not reflect light with a wavelength of 550 nm?
November 13, 2010

calculus
thank you
November 12, 2010

calculus
5113
November 12, 2010

calculus
The side of a square are increasing at 2 inches per second. How fast is the diagonal increasing when the side is 3 inches?
November 12, 2010

Linear EQUATIONS
You know I had also approached it this way since I find the tables a bit challenging. May I? 1/5 x; I wanted to choose a multiple of 5 so I chose -15. -15/5 = -3. First pt (-15,-3); Then x = 10; y = 10/5 = 2 Second pt (10, 2). I then chose a third point on the graph just to ...
November 12, 2010

Linear EQUATIONS
Hi bob. The table is what I do not understand. however when x is 0 I believe y is at 0 and if it is does that mean the y intercept is (0,0)?
November 12, 2010

Linear EQUATIONS
Need help! Graph the equation and identify the y intercept. Y = 1/5 x THANK YOU!
November 12, 2010

linear equations
Hold on. I actually need to graph this. What I did was go up vertically to 2 on the y axis, however the graph does not seem to be complete. The second answer for the horizontal line or x axis is (-2,0)?? Could that be correct??
November 11, 2010

linear equations
Great. Thank you
November 11, 2010

linear equations
Having trouble with this one. Thank you. Graph the equation and identify the y - intercept. y = 4/3x+2. (0,?) Thank you
November 11, 2010

ALGEBRA
wonderful! Thanks bob
November 11, 2010

physics
36.824
November 10, 2010

algebra
If 5T:9 = 1:2 what would t equal?
November 10, 2010

Math 111 URGENT
I wrote it like that but the message that keeps popping up is "Unexpected character '='" I'm using WeBWorK if that is any explanation to why I'm having issues
November 10, 2010

Math 111 URGENT
I have that the asymptotes are -2 and 2 however for my homework I need to write an equation to find the asymptote which I do not understand...?
November 10, 2010

Math 111 URGENT
Find the vertical asymptotes of the following function: f(x)={x-3}/{(x-3)(x^2-4)}. The equation(s) of the vertical asymptote(s) of f is/are___ & ____
November 10, 2010

3rd grade
02+03=05
November 8, 2010

Chemistry 151
Of the following transitions in the Bohr hydrogen atom, the ____ transition results in the emission of the highest-energy photon. a.n=1, n=6 b.n=6, n=1 c.n=6,n=3 d.n=3,n=6 e.n=1,n=4
November 8, 2010

algebra
No, 6(-10-2)=-72 not 70
November 8, 2010

math
No, I don't believe there's another answer. I think that 22 is the only answer.
November 7, 2010

Math
To find the hypotenuse you need to know the pythagorean theorem where a^2 + b^2 = c^2. Here a and b are the sides of the triangle that make the right angle and c is the hypotenuse. If you plug it in to that equation you should have your answer.
November 7, 2010

Physics
A uniform ladder 5.0 m long and weighing 200 N is placed against a very smooth wall so that the lower end of the ladder is 3.0 m from the wall. If the coeficient of friction between the ladder and the ground is 0.50, determine the maximum distance that a 700 N man could climb ...
November 7, 2010

Math
You have to translate this into math terms. "Is" is the same thing as = and "of" is the same thing as a multiplication symbol. You also have to remember that 98%=.98. You should then have 6=.98x and when you divide each side by .98 your answer should be ...
November 7, 2010

math
When x=0 because if you plug 0 in for x the result is 0.
November 7, 2010

Physics
A 0.18 kg point mass moving on a frictionless horizontal surface is attached to a rubber band whose other end is fixed at point P. The rubber band exerts a force F = bx toward P, where x is the length of the rubber band and b is an unknown constant. The mass moves along the ...
November 4, 2010

Algebra
Hi. I have an answer for this and just need to confirm it. 2x+5(less than or equal to sign here)x + 6. I minused the x's on both sides of the greater then equal to sign; x +5 (greater then or equal to sign) = 6; x +5-5 (the sign here) 6-5 gives me x (greater than equal to ...
November 4, 2010

5th grade
1,568 divided by 14
November 3, 2010

Physics, Propagation error
Does anyone know how to find the propogation error for this equation? K_i = 1⁄2 m_b v_i^2 = ½ (.069g)(6.49m/s)² = 1.45(kgm²)/s² Thank you so much!
November 3, 2010

Physics
please help !! A 10 kg sled is pulled horizontally by a force. If the coefficient of static friction is 0.3 , what force is needed to get the sled moving at a constant velocity?
November 3, 2010

Momentum Problem
A cart of mass m1 = 15 kg slides down a frictionless ramp and is made to collide with a second cart of mass m2 = 23 kg which then heads into a vertical loop of radius 0.21 m. (a) Determine the height h at which cart #1 would need to start from to make sure that cart #2 ...
November 3, 2010

Debate: Policy
I'm trying to find articles and information about the U.S. Armed Forces. I've been trying to find some info for hrs. could you send me some links to websites that could help me? THANKS.
November 2, 2010

operational management
Activity Time Predecessor(s) A 3 None B 4 A C 3 B D 5 B E 10 C, D F 3 E G 6 E H 5 G, F Please assist with finding the ES, EF, LS, LF and slack time for ALL activities. also, the critical path? and, the project completion time?
November 2, 2010

spanish
Si, las estoy preparando. Si, lo estan limpiando.
November 1, 2010

Word within the Word Analogy Help list 12
HELP do you know the answer to any on word within word list twelve?!
November 1, 2010

Physics
A father (mF = 83 kg) and his daughter (mD= 43 kg) stand on a flat frozen lake of negligible friction. They hold a 13 m long rope stretched between them. The father and daughter then pull the rope to bring them together. If the father is initially standing at the origin, how ...
November 1, 2010

Chemistry
If 3.50g of Na3Po4 and 6.40g of Ba(No3)2 are added together how many grams of Ba3(PO4)2 will be produced? Which is the limiting reactant? Please explains step by step THANK YOU
October 31, 2010

english
Thank for ur help, i'm not good writer!
October 31, 2010

english
This what I wrote about the word "ABuse" and its history. Please tell me if I am definding the word correctly with examples and if my sentences are structured. Your help is apprected. To certain people the word abuse has many meanings; thus the word abuse itself was ...
October 31, 2010

algebra
59=8y+3
October 31, 2010

Physics
What property of Maxwells equations results in electromagnetic waves? A. Moving charges create B B. There are no magnetic monopoles C. delta E/Delta t creates B and delta B/delta T creates E D. Charges create E and currents create B
October 30, 2010

Physics
I have a 250- turn circular coil of wire, 0.10 m in diameter, perpendicular to a 0.050 T magnetic field as shown below. I flip the coil 180 degrees in 1/30 of a second. What is the average voltage created across the ends of the coil? A. -6.0 V B. -12 V C -3.0 V D. -24 V
October 30, 2010

Physics
The Earth's magnetic field above the Earth's equator is about 10^-4 north. If a proton is intially moving downward at 5*10^5 m/s, it will? A. curve east, making a circle with r= 50 m. B. curve west, making a circle with r=50 cm C. curve east, making a circle with r= 3 ...
October 30, 2010

Physics
Which way does the magnetic vector B point in the vicinity of the Earth's North Pole? A. Upward B Downward C. Horizontally D. THere is no magnetic field at the North Pole
October 30, 2010

Physics
Number 10 aluminum wire (radius= 1.3 mm) is commonly used for electrical installations in homes. What is the voltage drop in 20 m of this wire if it carries a current of 10 Amps? The bulk resistivity of aluminum is 2.7*10^-8 Ohm*m A) 1.3 V B) 1.9 V C) 1.0 V D) 2.5 V
October 30, 2010

bussiness management
For this discussion use the Critical Thinking Process to analyze the problem-solving the individuals may apply in the case study, "Elective Surgery Department Faces Decreased Patient Satisfaction." Share your chosen role and your role's ideas for the planning ...
October 30, 2010

English
Can someone check my answers for me. We're learning about commas...did I put them in the right places. 1. Pottery provides important archaeological artifacts for it is abundant, identifiable, and well preserved. 2. Yes, I do think that I must stop aggravating you. 3.Many ...
October 30, 2010

poetry
Can somebody list some poems that is considered as a "Poetry Survivor" (a best poem that relates to the TV show "Survivor"
October 28, 2010

english
I picked topic which is Abuse and the history of the word which is misuse. Please tell me ways to write about this word and what can i compare it to. I have to write the meaning of the word, including its history. Thanks for helping me.
October 28, 2010

math111(3)
The function f(x)=(x+6)^2 is not one-to-one. Choose the largest possible domain containing the number 0 so that f(x) restricted to this domain is one-to-one. The largest possible domain is [-6,infinity) If the restriction function is written F, then inverse function F^{-1}(y)=...
October 27, 2010

math111(2)
Suppose h(x) = x^2 + 8 x + 5, with the domain of h being the set of positive numbers. Evaluate h^{-1}(8).
October 27, 2010

math111
Suppose the graph of f is a parabola with vertex at (2,1). Suppose g(x) = 3 x + 2. a) What are the coordinates of the vertex of the graph of g(composed)f? b) What are the coordinates of the vertex of the graph of f(composed)g?
October 27, 2010

Chemistry
How many atoms of mercury are present in 5.4 cubic cm of liquid mercury? The density of mercury is 13.55g/cc. mass Hg = volume x density Then convert to moles. Then remember there are 6.022E23 atoms for every mole. I still don't get how to do this! HELP ME!!!
October 27, 2010

Chemistry
1. Calculate the number of moles of carbon atoms present in 2.4g of ethanol (C2H6O). 2. What is the % Nitrogen by weight in 3.696 mol of ammonium sulfide. 3. How many atoms of mercury are present in 5.4 cubic cm of liquid mercury? The density of mercury is 13.55g/cc.
October 27, 2010

chemistry
How to make into compounds to get a formula? Li+: Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cu:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Pb2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Ca2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Al3+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cr5+:Br-, O2-, CN-, SO3^2-, ...
October 27, 2010

literary
Thank you!
October 27, 2010

literary
In what distant deeps or skies Burnt the fire of thine eyes? On what wings dare he aspire? What the hand dare seize the fire? and Tyger! Tyger! burning bright In the forests of the night, What immortal hand or eye Could frame thy fearful symmetry? Are "In what distant ...
October 27, 2010

Math 111
Thank you so much!!!
October 27, 2010

Math 111
Find the quadratic function that has vertex (-1, 8) and whose graph goes through the point (8, 170). I could not understand this problem I Can not for the lift of me get it. I got as far as some number(x+1)^2+8 but i dont know what the number before all that would be for the ...
October 27, 2010

Chemistry
How to make into compounds to get a formula? Li+: Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cu:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Pb2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Ca2+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Al3+:Br-, O2-, CN-, SO3^2-, PO3^3-,MnO4- Cr5+:Br-, O2-, CN-, SO3^2-, ...
October 27, 2010

MATH
Earth, Jupiter, and Uranus all revolve around the sun. Earth takes 1 yr, Jupiter 12 yr, Saturn 30 yr, and Uranus 84 yr to make a complete revolution. One night, you look at those three distant planets and wonder how many years it will take before they have the same position ...
October 27, 2010

Math
She will have 56.00
October 27, 2010

physics
A projectile is fired at an upward angle of 45 degrees from the top of a 265 m cliff with a speed of 350 m/s. What will be it's speed when it strikes the ground below?
October 26, 2010

english
Describe your experience with credit and credit cards in a brief paragraph using at least five adverbs and five adjectives in your description. Bold the adverbs and underline the adjectives
October 25, 2010

College Chemistry
1) A 25mL sample of the .265M HCI solution from the previous question is titrated with a solution of NaOH. 28.25mL of the NaOH solution is required to titrate the HCl. Calculate the molarity of the NaOH solution. 2) A 1.12g sample of an unknown monoprotic acid is titrated with...
October 25, 2010

Organic Chemistry
Separation scheme for isolating benzoic acid Could you please show me a separation scheme for isolating benzoic acid from a reaction mixture if mixing a Grignard reagent phenylmagnesium bromide with dry ice (CO2) in ether? Thanks!
October 22, 2010

Science
Separation scheme for isolating benzoic acid Could you please show me a separation scheme for isolating benzoic acid from a reaction mixture if mixing a Grignard reagent phenylmagnesium bromide with dry ice (CO2) in ether? Thanks!
October 22, 2010

Chemistry
17.606gNa2CO3(mol Na2CO3/106gNa2CO3)*(2molNa/molNa2CO3)* (23gNa/molNa)= 7.64gNa
October 22, 2010

Chemistry
Which of the following elements has an ionic radius greater than its atomic radius a) Ca c) Fe b) Li d) N
October 21, 2010

government
Who can impose the draft and under what circumstances?
October 21, 2010

Spanish
El alumno o el profesor? complete each sentence with the appropriate word. 1. En una escuela americana "A" es una nota ________ y "f" es una nota ________. 2. El profesor_________; el alumno ________ la pizarra. i think number 1 is buena & mala but im not ...
October 19, 2010

english
Define sentence variety and rhythm in your own words and explain how they interact in effective writing
October 18, 2010

english
By adding sentence variety in writing you can give it life and rhythm. Your readers can be bored by reading too many sentences with the same structure and length. It can grow to be monotonous for readers.
October 18, 2010

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