Monday
July 28, 2014

Posts by Jessica


Total # Posts: 2,604

Physics
How does the eye adjust the focus of an image on the retina?

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?

calculus
thank you

calculus
5113

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?

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 ma...

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)?

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

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??

linear equations
Great. Thank you

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

ALGEBRA
wonderful! Thanks bob

physics
36.824

algebra
If 5T:9 = 1:2 what would t equal?

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

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...?

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___ & ____

3rd grade
02+03=05

3rd grade
02+03=05

3rd grade
02+03=05

3rd grade
02+03=05

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

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

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

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.

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 ...

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 abo...

math
When x=0 because if you plug 0 in for x the result is 0.

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 do...

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 ...

5th grade
1,568 divided by 14

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!

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?

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 complet...

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.

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?

spanish
Si, las estoy preparando. Si, lo estan limpiando.

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

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 f...

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

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

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 ...

algebra
59=8y+3

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

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

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 ...

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

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

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 mee...

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 d...

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

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.

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)=...

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).

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?

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!!!

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.

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-, P...

literary
Thank you!

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 dee...

Math 111
Thank you so much!!!

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 v...

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-, P...

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 ag...

Math
She will have 56.00

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?

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

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...

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!

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!

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

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

government
Who can impose the draft and under what circumstances?

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 s...

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

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.

Chemistry
so that means the ion is smaller because your removing the 2 outside electrons ?

Chemistry
Which has a larger radius, Mg or Mg+2? Explain why. Thanks ! I think its Mg+2 but im not sure why.

chemistry
write a balanced chemical reaction for the reaction of aqueous magnesium chloride with aqueous potassium phosphate to form solid magnesium phosphate (Mg3(PO4)2) and aqueous potassium chloride (KCl). Indicate the physical states of the reactants and products

chemistry
Write a balanced chemical reaction to show the dissociation of solid magnesium chloride (MgCl2) in water, indicate states of the reactants and products

Probability - CHECK ANSWERS
Thanks a bunch!

Probability - CHECK ANSWERS
I have an eight pack of crayons. Colors red, green, blue, orange, black, gray, pink, and purple. What is the probability of choosing the green crayon? 12.5 percent What is the probability of choosing the red, blue, or gray crayon? 37.5 percent What is the probability of not ch...

math
suppose both pairs of opposite sides of a quadrilateral are parallel. Which angles of the quadrilateral must be supplementary?

5th grade
What do you think 24*3.7 is ???

geography
What impact did the dissolution of the Union of Soviet Socialist Republics have?

math
Why is 24,005 greater than 8,999?

Physics
If i have ten grains of sand on a flat, 8x8 chessboard, randomly distributed, what is the probabilty that all ten are on the same square?

Physics
The sun has a raduis of 6.96*10^8m and a surface temperature of 5780K. How much power is radiating?

Physics
Consider 3 layers of a wall. The first layer is plaster 1.0 cm thick(R=0.033 SI units), the second layer is fiberglass insulation 8.9 cm thick (r=2.97), and the outside layer is woodd 3.0 cm thick(0.33). What is the heat loss through one square meter of wall if the inside temp...

science
what reactants are added together to get copper nitrate!

word problem
Members of the Computer Club were assessed equal amounts to raise $1200 to buy some software. When 8 new members joined, the per-member assessment was reduced by $7.50. What was the new size of the club?

word problem
2. The excursion boat Holiday travels 35km upstream and then back again in 4h 48min. If the speed of the Holiday in still water is 15km/h, what is the speed of the current?

word problem
1. During 60mi of city driving, Jenna averaged 15mi/gal. She then drove 140mi on an expressway and averaged 25mi/gal for the entire 200mi. Find the average fuel consumption on the expressway.

Algebra 2
1. During 60mi of city driving, Jenna averaged 15mi/gal. She then drove 140mi on an expressway and averaged 25mi/gal for the entire 200mi. Find the average fuel consumption on the expressway. 2. The excursion boat Holiday travels 35km upstream and then back again in 4h 48min. ...

Home work for Gym
Thank You soo much!! ;D

Home work for Gym
To join a gym, your friend pays a one-time fee of $75 and $45 per month for the duration of the membership. Your friend has paid a total of $345. How long has your friend been a member of the gym? HELP ME1 :D

Math; Pre- Algebra
Please help me !! :0

Math; Pre- Algebra
Problem: -5k - 19 = 5 - 13k Solve for k. -15n = 16 = 86 - 29n Solve for n.

Math; Pre- Algebra
I neede help with how to solve equations with variabls on both sides. Can you give me some examples and work them out step by step?? Please!! :D

geometry
M is the midpont ST what is the reason?

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