Friday
April 18, 2014

Posts by Anonymous


Total # Posts: 68,169

Physics
In a lightning bolt, a large amount of charge flows during a time of 2.2 10-3 s. Assume that the bolt can be treated as a long, straight line of current. At a perpendicular distance of 28 m from the bolt, a magnetic field of 7.3 10-5 T is measured. How much charge has flowed d...

Physics
thank you so much!!!

Physics
I figured out the right equation. It is B=mu*n*I but I still don't know how to figure out what I is

Physics
to calculate turns/length, would it be N/R = 2B/mu*I? but then what is my I value? or am I going about this the completely wrong way?

Physics
A solenoid is formed by winding 25.3 m of insulated silver wire around a hollow cylinder. The turns are wound as closely as possible without overlapping, and the insulating coat on the wire is negligibly thin. When the solenoid is connected to an ideal (no internal resistance)...

Math
Oh, okay. Thanks!

Math
The answer key says 3+-square root 3

Math
How to tell how many solutions c^2 - 18 = 9 in mental math?

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

chemistry
Calculate the percent yield for an experiment in which 46.9 g of SO3 was produced upon the reaction of 51.2 g of SO2 with 25.0 g O2

Math HELP!! Who can solve??
I suggest you give them sample values to find the answer.

physics
21.74

PLEASE HELP!!computer science
I'm trying to write a program for this piece wise function using CPU sim.its really argent... f(n) = n^5 (n<0) 10 (n=0) n^2 -2n +5 (n>0) i have worte this program bust still give error on cpu simulator.. please can you help me correct this error. Start: read 0 ; read...

TO DrBob222 Science
Also what would the pH value for grapefruit juice be? (>7, 7, or <7)

TO DrBob222 Science
1. with respect to ion count, why is water considered to be neutral? 2. How do the number of H+ and OH- ions compare after a.) HI is added to water? b.)KBr is added to water? c.)KOH is added to water? 3. Give the Arrhenius definitions for salts. Thanks :)

chemistry
A gas mixture contains 75.2% nitrogen and 24.8% krypton by mass. What is the partial pressure of krypton in the mixture if the total pressure is 853mmHg ?

Chemistry
A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium.What is the partial pressure of oxygen when this mixture is delivered at a total pressure of 8.9atm ?

geometry
Marta is standing 4ft. Behind a fence 6 inches tall. When she looks over the fence, she can just. See the top of a building. She knows that the building is 32 ft. 6 inches behind the fence. Her eyes are 5 ft. From the ground. How tall is the building?

statistics
If boys and girls are equally likely and groups 400 births are randomly selected find the standard deviation

Algebra
Find the equation of the parabola with its vertex at (h,k). Vertex: (-2.1) Focus: (-5,1) I know I put it into (y-k)^2=4(p)(x-h) so (y-1)^2=4(p)(x+2). How do I find the value of p?

Algebra
Find the equation of the parabola with its vertex at (h,k). Vertex: (-2.1) Focus: (-5,1) I know I put it into (y-k)^2=4(p)(x-h) so (y-1)^2=4(p)(x+2). How do I find the value of p?

Description
Thank you.

Description
Which of the following sentences are considered as a description of the terms "active voice" and "passive voice"? "Sentences written in the active voice are often less wordy and more direct than those written in the passive voice." Or "A verb...

trig
okay, thanks!

trig
I have an equation that is 3tan2x=3 and the solution is x=pi/12 + npi/3 and another equation that is 2tanx-2=0 , the answer sheet says the solution is x=5pi/4. why is the npi not added to the second solution but it is on the first?

trig
cos/sin use 2npi and tan uses npi, but how do you know when to add 2npi or npi to the solution of the equation?

A Peculiar Question
Alright. However, in your own opinion as a teacher, would you consider these grades to be terrible?

A Peculiar Question
Is either a B+ or an A- considered a terrible grade? If I received a B+ for two essays that I was assigned and then an A- for another, will these grades ultimately cause a decrease in my GPA? I want to enter into either a film or art college, and I want to retain my 4.0 GPA wh...

Chemistry
How do you find the initial concentration of the acid give the titration curve of a weak acid-strong base titration?

Chemistry
Calculate the pH of the solution that results from mixing 30.0 mL of 0.050 M HCN(aq) with 70.0 mL of 0.030 M NaCN.

math
there are 18 boys in a class. there are W less boys than girls. How many students are in the class?

Physics!
Yes he's a Professor , I'm stumped and have no clue whats he asking.

Physics!
Consider someone in a rotating space habitat. The outward force felt by the person A.has no reaction counterpart B.is an interaction with Earth C.is a form of gravity D.is real in the traditional sense

Math
how do you use the quadratic formula on a TI-83 calculator? I'm in algebra 1!

uta
the acidity constant of acetic acid is 1.8 x 10^-5. Calculate the % error of the measured Ka value of 1.82 x 10^-5

Science URGENT PLEASE
Thank u so much :)

Science URGENT PLEASE
1. what would you expect the pH value for grapefruit juice to be? (>7, 7, <7) 2. A.) Which two ions are present in very small amounts in any sample of pure water? b.) what is a good alternative chemical formula for water rather than H2O? Why? c.) with respect to ion coun...

math
What is 11.11

Chemistry
Calculate the change in mass of the In electrode after the cell supplies 100 mA of current for 10 minutes. The balanced redox reaction is 2In+Cl2=2In+ + 2Cl-. I understand the idea behind the question, I just don't know if I should use 1 mol In per 1 mol e- or 1 mol In per...

Science question, only 1
What would be the consequence of an ecosystem that had no nitrogen-fixing bacteria? Nitrogen from decomposing animals would never be returned to the soil. Decomposers would not be able to break down the nitrogen present in plants they feed on. Plants would have to rely on biol...

Chemistry
Why do you divide .01 by 2. Shouldn't you divide by 1 because 50 ml+50ml=1L

Chemistry
The reaction OH- + NH4+ = H20 + NH3 is kinetically first order in both reactants' concentrations. The rate constant is 2e10 1/M s. If 50 ml of .01 M NaOH is mixed with 50 ml of .01 M NH4CL, find the time required for the OH- concentration to reach 1e-4 M.

Chemistry
A saturated solution of MgF2 at 23 degrees C was prepared by dissolving solid MgF2 in 1 L water. The Ksp of MgF2 is 1.5e-5. a.)Calculate the mass of MgF2 dissolved. b.) When .1 mols of solid KF was dissolved in the MgF2 solution, precipitation was observed. Find the mass of th...

us history
Would 7 be slavery? and 9 be, many gains were made in the area of women's education during this period?

us history
Hello! Can you please help me?? 1. In the 1800s, there was a wave of religious fervor known as the () Religious Right. (x) Second Great Awakening. () Religious Awakening. () Revival Times. 2. What movement called for drinking little or no alcohol? () Transcendentalist () utopi...

english
maria is doing caca .

english
the essay is about someone who has no privacy and the thesis statement is something like "i wish people respected my privacy." i dont really know how to start off my introductory paragraph.

english
how would you start off an essay that is about the lack of privacy you have? (has to be in first person)

science help pleasee
isn't it also ionic bonds too with the hydrogen ions? i dont really understand it

science help pleasee
what type of bonding is phosphoric acid?

A Peculiar Question
If I have been given a B+ for two essays, it is considered a terrible grade? Will it affect my report card?

Puncuation
Am I supposed to write the definition, pronunciation, and part of speech of the word "bliss" like this? Bliss /blis/ (noun): perfect happiness; great joy.

chemistry
a gas with a volume of 4.00 L at pressure of 205kPa is allowed to expand to a volume of 12.0L. what is the pressure in the container if the temp remains constant

Grammar
What is the part of speech of the word "bliss"?

Geography Answer Evaluation (Ms. Sue)
Which four seas border Italy? My answer: The Adriatic, Ionian, Ligurian, and Tyrrhenian Seas border Italy.

Algebra Based Physics
A 2.50-kg steel ball strikes a massive wall at 10.0 m/s at an angle of θ = 60.0° with the plane of the wall. It bounces off the wall with the same speed and angle (see the figure below). If the ball is in contact with the wall for 0.224 s, what is the average force ex...

biology
hi ms sue its me Anthony

biology
that isn't an option, but would flowchart be kind of close to a circle graph?

biology
What graphic could you use to best show the checkpoints in the cell cycle? a. line graph b. bar graph c. flowchart d. map I'm not sure, I think it's c?

Grammar
Should "a Happy Birthday" not be capitalized?

Grammar
Is this sentence grammaratically correct? "Although I already wished you one at Seminary this morning, I still hope you have a Happy Birthday."

physics
A cylinder floats with its volume 3 cubic metre inside water. What is its total volume if its density 100 kg per cubic metre? Density of water is 1000 kg per cubic metre

SCIENCE 1 QUESTION PLS HELP!!!!!
C

grammar
The patient’s first visit, to the office, was for lower back pain.

physics
Two cars start off a race with initial velocities u0 and v0, and travel in a straight line with uniform acceleration á and â. If the race ends in a dead beat, prove that the length s of the race is: s=(2(u_0-v_0)(u_0 â-v_0 á))/(â-á)^2

Physical Science
The current in a toaster oven is 15 A when plugged into an electrical outlet that is 110 V. How much electric power is used by the toaster oven? Formula: P = IV

statistic****help*****
A) 0.53/1.00=0.53 B) 0.25/1.00=0.25 C) 0.47+35=.82 D) 0.04 +0.35=.39 IS THIS CORRECT

physics
A pitcher throws a 0.198-kg baseball, and it approaches the bat at a speed of 57.5 m/s. The bat does 85.1 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 32.7 m above the point of impact.

physics
The drawing shows a skateboarder moving at 6.93 m/s along a horizontal section of a track that is slanted upward by 45.6 ° above the horizontal at its end, which is 0.654 m above the ground. When she leaves the track, she follows the characteristic path of projectile motio...

physic
A 47.5-g golf ball is driven from the tee with an initial speed of 41.8 m/s and rises to a height of 34.5 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest point. (b) What is its speed when it is 8.88 m below its highest point?

Chemistry
I need to vary the surface area by choosing different size beaker. I will put liquid in there so it would have to be volume??cm^3? But the question is how can I calculate the surface area of the beaker ??? The key thing here is the container... Examples: 27cm^3??? 250 ml beake...

Chemistry
I have no idea how to solve for the volume of methane. Any help?

Chemistry
Natural gas is almost entirely methane, CH4. What volume of natural gas at 20 C and 1.00 atm pressure is required to heat one quart of water from 20 C to 100 C? The density of methane at 20 C is 0.665 g/mL. The reaction for the combustion of methane is CH4 (g) + 2 O2 (g) -->...

Math
I mean 0 for -2x^2. Sorry about the 4, I didn't mean to put that.

Math
Thank you. Yes, I meant to put the y in there. Are the x-intercepts 0 and 4, respectively?

Math
What are the axes of symmetry in the graphs of the equations -2x^2 and -2x^2 + 4? I think the vertices are (0,0) and (0,4).

Math
I have been stuck on this problem for a while need help on it and soon. It's functions. X Rule Y 10 65 30 45 50 25 70 5 I can't find the rule

math
holly's garden is divided into 5 equal sections. she will fence the garden into 3 areas by grouping some equal sections together. what part of the garden could each fenced area be?

math
Thank you so much Ms. Sue and Pride! :)

math
5=7+n

math
Thank you guys so much! Especially Pride! Thank u for putting so much time and effort on teaching us!

math
-9=6+a

math
F+7=10

Science
For carbon to move from an animal to a car, what processes need to happen? Photosynthesis, combustion, and respiration? Respiration, fossilization, and photosynthesis? Fossilization, decomposition, and respiration? Or respiration, photosynthesis, and decomposition?

Math
Eric and Madison both measured the trading card. Eric says he got 3 inches and Madison says she got 2 3/4th. The teacher says both are right. How is that possible?

math
D/6 = -10

Chemistry
What does each electron outside of a nucleus occupy?

Math
Write multiplication equation that has a solution of 9/14

Math
Write a multiplication equation that has a solution of -14.8

help i have no idea!!!!!!
1.It took Jack 4 hours to drive from his house to the beach at a speed of 45km/h. If he takes 5 hours to make the return trip home,what will his speed be?

Personal
When I print them from my printer they aren't like glossy. That's how we need them. I asked Walgreen's and they said they can't do that because it's photo-shopping or something..

Personal
I'm printing my pictures out from Walgreens so like how would I get them there.

Personal
Can I then print it out? Like the real pictures?

Personal
Her moms like never home, she usually gets home really late.

Personal
I have a question about like life... it relates to school as well. Like I have a huge project due THIS Thursday and I helped take care of my friends dogs and I have to take pictures of them and my friend says I can take them now and when I ask her she always says she can't...

Science
For carbon to move from an animal to a car, what processes need to happen? Photosynthesis, combustion, and respiration? Respiration, fossilization, and photosynthesis? Fossilization, decomposition, and respiration? Or respiration, photosynthesis, and decomposition?

Science/Chemistry
Is this equation balanced? Does it show that no atoms are lost or gained in chemical reactions? 8Fe + S8 --->8FeS

physics
A 5.0-nC charge is at (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the electric potential energy of a 1.0-nC charge at point (0, 4.0 m)? Answer 1.5 × 10-8 J 3.6 × 10-9 J 1.1 × 10-8 J 7.7 × 10-9 J

physics
What is the minimal resistance of a 100 W light bulb designed to be used in a 120 V circuit? Answer 12.0 Ω 144 Ω 1.2 Ω 0.83 Ω

Statistic Help please
1. no;no 2. 20%

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