Friday
November 28, 2014

Posts by john


Total # Posts: 6,353

Algebra
I need to simplify this: 2(-7) + 15(-7) =
September 10, 2013

Chemistry
The reaction is NO+1/2O2 ----> NO2 Then the moles of O2 needed are, n=2.2*1/2=1.1 mol O2 So the mass is M=1.1*32=35.2 grams (Molar mass of O2 is 32 g/mol). The moles of NO2 produced are, n=2.2 mol And the mass, M=2.2*46=101.2 g (Molar mass of NO2 is 46 g/mol)
September 10, 2013

math
A perfect square is, (a+b)^2=a^2+b^2+2ab So you have to adapt the equation given to this expression. The term with x should be of the form 2ab, but a=sqrt(2)x, so b=5/(2*sqrt(2)), then 2x^2-5x-12=(sqrt(2)*x)^2+sqrt(2)*x*5/(2*sqrt(2))+25/8-25/8-12=0 (sqrt(2)x+5/(2sqrt(2)))^2=...
September 10, 2013

physics
please answer this question
September 9, 2013

us history
how do i make mine better though
September 9, 2013

us history
is this a good thesis statement for a paper i have to write about changes in the us from 1776 to 1870? "while we are still not a perfect country, political,social and economical changes are shaping up out country" is it ok or is there anything i can do to make it ...
September 9, 2013

u.s. history
how bout this one. while we are still not a perfect country, political,social and economical changes are shaping up out country
September 9, 2013

u.s. history
how can i make this one better?
September 9, 2013

u.s. history
is "positive changes that happened from 1776-1879 in American history" a good thesis?
September 9, 2013

u.s. history
ok im no good at thesis though but i will study up the site you showed me
September 9, 2013

u.s. history
well i was thinking about using some what along the lines of new inventions bring new era for the united state but my teacher said the paper has to be 5 paragraphs long with introduction 1st body(political changes)2nd body(economic changes,3rd body(social changes) and ...
September 9, 2013

u.s. history
i need a good thesis statement for a history paper i have to write. the topic is changes that took place in the U.S. from 1776-1870 im not good at thinking up thesis statements please help
September 9, 2013

Religion
Why does the Church encourage the faithful to read and study Scripture in light of the teachings of the Church?
September 9, 2013

COM 200 Quiz
HELLO!?!? ANYBODY THERE!?!?!?
September 8, 2013

COM 200 Quiz
I am checking to see if my answers are correct. If you see any that are wrong please let me know.
September 8, 2013

COM 200 Quiz
1. My boss, Josie, is a great supervisor because she listens to each employee’s concerns and ideas. Josie is an example of a: (Points : 1) *a) Social schema b) Stereotype c) Person Schema d) Prototype 2. Beth believes that she does a good job of presenting herself as a ...
September 8, 2013

math
how do you solve this 1/(1+ã2)+ã3/ã5
September 8, 2013

chemistry
1234
September 8, 2013

Quantum physics
what is the answer??
September 7, 2013

math
An amusement park charges an admission fee of dollars per person. The cost, (in dollars), of admission for a group of people is given by the following function. What is the cost of admission for a group of people?
September 5, 2013

physical pharmacy please help
How are colloidal dispersions different from other types of dispersed systems?
September 3, 2013

parentheses
Add parentheses so that following equation is correct 7+9X3-1=25
September 2, 2013

Statistics
1. A pie chart can not be used for a frequency distribution with overlapping classes. A) True B) False True?
August 30, 2013

Math
An observational study is described. Determine the nature and scope of the conclusion the study can reach. In a group of 500 women, those who smoked moderately did worse on tests of reaction time than those who did not smoke. A) Smoking moderately causes women to do worse on ...
August 28, 2013

physical pharmacy please help
Explain the importance of solubility to dissolution.
August 28, 2013

Genetics
Genes: Brown = B Big eyes = E Small ears = S Frizzy hair = F These 4 phenotypes B, E, S, F are dominant. Recessive alleles = b, e, s, f Assume that all 4 genes are present on the same chromosome and 1) Be/bE and be/be resulted in 400 Be/bE, 300 be/be, 200 bE/be, and 100 Be/be ...
August 24, 2013

Health
the national weight control registry found that those who maintained weigth loss reported imporvements in what
August 21, 2013

ENGLISH
revise the following paragraph, improving it without changing its overall meaning. pay particular attention to any subject- verb agreement errors. You ever felt sleep deprived? college students often complains that they are not getting enough sleep.
August 19, 2013

Physics
When pressure sores develop from sustained positions, the damage occurs at two locations simultaneously – the superficial layers of skin next to the table, and the deep tissue next to the bony structure (e.g. lateral aspect of the femur) that the patient is ...
August 15, 2013

Physics
6. Within an x-ray tube, a metal disc (the anode) receives a huge amount of energy that is converted to internal energy (heat) within the anode. The surface temperature can easily reach 2000° C. Because the anode is within a vacuum and therefore there is no air ...
August 15, 2013

physics
Two long, straight, parallel wires 10 cm apart carry currents in opposite directions. (a) Use the right-hand source and force rules to determine whether the forces on the wires are (1) attractive or (2) repulsive. Show your reasoning. (b) If the wires carry equal currents of 3...
August 15, 2013

marketing principals and information technolgy
exam questions and answers
August 13, 2013

math
An object with mass m is attached to a string and the other end of the string is attached to a peg at the center of a level table. The object is set into uniform circular motion around the peg. The radius of the motion remains constant (the string does NOT wind up on the peg...
August 7, 2013

Stats
ya i am working on it
July 31, 2013

POL 201 American National Government
#4 is D Bur Dem
July 28, 2013

POL 201 American National Government
I got 9 out of 10 right...don't know which one I got wrong tho
July 28, 2013

POL 201 American National Government
1) Presidents often seek to control the federal bureaucracy by doing all of the following except: a) filling the top echelon of executive organizations with political appointees who share their values. b) assigning members of the White House staff responsibility for monitoring...
July 28, 2013

Chemistry
A piece of wood found in an ancient city has a carbon-14 to carbon-12 ratio that is one-eighth the carbon-14 to carbon-12 ratio of a tree growing nearby. How old is the piece of wood? (The half-life of carbon-14 is 5,715 years.)
July 22, 2013

Chemistry
An artifact has a carbon-14 to carbon-12 ratio that is one-fourth the carbon-14 to carbon-12 ratio of a similar modern object. How old is the artifact? (The half-life of carbon-14 is 5,715 years.)
July 22, 2013

eth/125
Racial diffrences
July 21, 2013

eth/125
Ethnicity refers to a.racial differnces b.diffrences in physical and mental characteristics c.cultural diffrences d.citizenship
July 21, 2013

American National Government
2) d 3) a ???
July 21, 2013

American National Government
Thank you! What would you say 2 and 3 are?
July 21, 2013

American National Government
1) a 2) c 3) c 4) d 5) d Is that right?
July 21, 2013

American National Government
1-During a hearing, executive branch officials are asked to: a) report on what their agency or department has been doing. b) state their intentions for reelection. c) pass new legislation proposed by Congress. d) approve funding for upcoming programs. 2-The division of ...
July 21, 2013

physics
The drawing shows the top view of two doors. The doors are uniform and identical. Door A rotates about an axis through its left edge, and door B rotates about an axis through its center. The same force is applied perpendicular to each door at its right edge, and the force ...
July 16, 2013

math
1. Lisa is 15 years old and her father is 40. How many years ago was the father six times as old as Lisa? 2. Joel is one third the age of Bob. In 7 years the combined ages of the boys will be 58. How old is each boy now? 3. Tom is three times as old as Leigh Ann. In 7 years, ...
July 14, 2013

Algebra
1. Simplify the expression. ¡Ì625 2. Evaluate the expression for a = ¨C1 and b = 5. 5a ¨C 7
July 11, 2013

alg 1
2x − 2y − 5z + 2x + 2y + 3z
July 10, 2013

statistics
agte
July 9, 2013

math
A home was valued at &73,500. It was insured for 80% of its value at a premium of &0.40 per $100. Find the yearly premium.
July 6, 2013

trig, math
A 175-pound force and a 230-pound force are acting on the same point in directions that differ by 42°. What is the angle that the resultant makes with the 175-pound force?
July 3, 2013

trig, math
Which of these functions has period 7? A)y= cot 7/pi x B)y= tan pi/7 x C)y= sin 7/pi x D)y= cos pi/7 x
July 1, 2013

Discrete Math
A special type of password consists of four different letters of the alphabet, where each letter is used only once. How many different possible passwords are there?
June 30, 2013

Chemistry
5542.68
June 29, 2013

Excel
I have my employee schedule in a excel sheet. It is a weekly schedule that doesn't change week by week, but changes day by day within a week. Every Monday, Tuesday, etc. is the same schedule. In the file are days for Monday, Tuesday, etc.. I don't know if this possible...
June 28, 2013

English
Can you please have a look at these questions I need to prepare for tomorrow? 1) Outline briefly the main features of English Romanticism. 2) Give a definition of primary and secondary imagination as given by Coleridge in his Treaty of Philosophy. 3) Which characteristics of ...
June 27, 2013

trig, math
In a right triangle with g the right angle, b = 86.5 and c = 125.8. What is β ?
June 27, 2013

Java Programming
I need to create a pseudocode for the follwing application: Write Java-like pseudocode to specify the logic for the following program application: Write an application that prompts an employee for an hourly pay rate and hours worked. Compute gross pay (hours times rate), ...
June 27, 2013

English
I still have a few questions to check. I really hope you can check them. Thank you! 1) Which metaphors does the poet use to address the urn in the first stanza? 2) How is the urn described? What figure of speech is used in line one and two “Heard melodies are sweet, but ...
June 26, 2013

English
Can you please help me express the first two questions? I also need you to go through the other questions and tell me if they are grammatically correct. Thank you very much in advance. 1) What role does time play in the narrative technique of the interior monologue? 2) Which ...
June 26, 2013

math
A market research company surveyed 2500 teenage cell phone owners. The company learned that 4/5 of them use cell phone data services. How many teenagers surveyed use cell phone data services?
June 25, 2013

Economics
Calculate the total dollar amount paid for a house purchased for $200,000. The buyer paid $50,000 as down payment and the remaining $150,000 was obtained with a closed mortgage having a 25 year loan at 10% interest compounded semi-annually and a monthly payment period. Assume ...
June 24, 2013

English
These are the very last things. Thank you very, very much. 1) In Joyce’s story The Sisters Nannie brings a decanter of sherry and some wine-glasses and invites the protagonist to take a little glass of wine. 2) Briefly refer to the plot of Joyce's tale The Sisters? ...
June 23, 2013

English
I left out a few more questions. Thank you very much in advance. 1) How is Mrs Dalloway described at the beginning of the novel? What is Mrs Dalloway fond of? 2) Who is Septimus Warren Smith? Describe Septimus and his wife Lucretia's reactions to the bursting of the car&#...
June 23, 2013

English
Thank you very much. I just have one more question. I've written a paragraph on Wordsworth's life using the past. At the end I included the following sentence: The power of his imagination enabled him to communicate his knowledge, so that he becomes (not became) a ...
June 23, 2013

English
I urgently need someone from Jiskha to check if these questions are grammatically correct. Thank you very much in advance. 1) Can you briefly repeat the content of your history dissertation in English? 2) What is the first part of the poem "The Waste Land" devoted to...
June 23, 2013

Differential Calculus (first part)
if g(x) = cos2x find g(-x)
June 20, 2013

Chem.
I need a 64% solution of ammonium chloride. I have 99% ammonium chloride powder. How many grams of the NH4CL do i need to add to 500 ml of water to get the 64% solution?
June 20, 2013

diffirential calculus
express the surface of a right circular cylinder a function of its volume assuming the height is constant
June 20, 2013

health
What is an example of how adults can develop knowledge to attain goals if running is a goal:
June 17, 2013

Math
Consider a right circular cylinder whose total surface area (top, bottom, side) is 300 pi; what must its radius be in order that the volume be as large as possible
June 15, 2013

grid problem (geometry)
The squares of a 2×60 chessboard are coloured black and white in the standard alternating pattern. At random, exactly half of the black squares are removed from the board. The expected number of white squares that have no neighbours after this process can be expressed as...
June 15, 2013

Physics :(( help please
You and a friend are going to ride on a Ferris wheel. For a little extra fun, when your friend is at the very top of the Ferris wheel she's going to drop a tennis ball. How far around the Ferris wheel in radians from your friend should you sit so you can catch the ball? ...
June 14, 2013

English
Thank you very much, Ms Sue. I left out a few other sentences. Could you please check them, too? I need them for tomorrow. 1) Numerous militants also chained themselves to railings and hit and spit at policemen. In 1911 the protests slowly became more violent. 2) Women smashed...
June 11, 2013

English
I have reduced my paragraphs to a few sentences. Please, let me know if it is OK. 1) In point of fact, the suffragettes had to face old stereotypes: the press ridiculed them, people treated them with indifference and hostility and the police attacked them both physically and ...
June 11, 2013

English
I need to prepare a short summary on the feminist movement for tomorrow. Can someone check it, please? Thank you very much in advance. 1) In October 1903, Emmeline Pankhurst founded the Women's Social and Political Union (WSPU) – a militant organization campaigning ...
June 11, 2013

Trig
I got 263.
June 10, 2013

Trig
The angle of elevation from a point on the ground to the top of a tower is 37deg5'. The angle of elevation from a point 120 feet farther back from the tower is 29deg5'. Find the height of the tower (to the nearest foot).
June 10, 2013

English
Can someone have a look at this short paragraph on Vincent Van Gogh? Thank you very much in advance. 1) Vincent was one of the leading exponents of the Neo-impressionism. He had a complex personality and could never find peace within himself. 2) He tended to isolate himself ...
June 10, 2013

Physics (Tricky)
Thanks for all the answer, also now that you put it that way Steve, it makes a lot more sense ! thank you for your time !!
June 10, 2013

Physics (Tricky)
i'm stuck on these question for ages now, help!!
June 10, 2013

Physics (Tricky)
If the length of a conductor is doubled, the resistance will be ___ the original resistance. A. less than - i think its A? B. equal to C. half D. twice A resistor most suited to dissipating high power levels would be: A. Thick film resistor - i think it's A? B. Wire wound ...
June 10, 2013

Physics
Find the Time Constant for a 50 k resistor in a series with a 60 uF capacitor connected to a DC circuit. Also how long will it take for this capacitor to become charged?
June 10, 2013

math
Find the equations for all vertical asymptotes for the function. y = csc (5x) Is this the right answer x= k pi / 5.
June 8, 2013

Trig
Find the reference angle θ'. θ= -7pi/9
June 8, 2013

Trig
Find the area of a sector with the given central angle θ in a circle of radius r. θ = 90°, r = 6 cm
June 8, 2013

math
Find the measures of two angles, one positive and one negative, that are coterminal with the given angle. 7pi/3
June 8, 2013

science
which sample (salt,fertilizer and sulfuric acid) will have the most algae growth? and why ? which sample (salt,fertilizer and sulfuric acid)will have the most living organisms ? and why?
June 8, 2013

Math
Find the median and the mean for the data set below. 5.4 2.0 6.8 3.1 2.9 4.7 2.1 5.0 1.9 3.4
June 8, 2013

science
which sample (salt,fertilizer and sulfuric acid) will have the most algae growth? and why ? which sample (salt,fertilizer and sulfuric acid)will have the most living organisms ? and why?
June 7, 2013

English
Can someone check these sentences I need to prepare on our local wines? Thank you very much in advance! 1) The are two schools of thought about barrel ageing which can be grouped in traditionalists and modernists. 2) Traditionalists support the idea that the wine should be ...
June 6, 2013

Maths
We have 15 points {Ai} placed within the unit sphere. What is the maximum possible value of ∑1≤i<j≤15 ∣∣AiAj∣∣^2? Details and assumptions Each of the points Ai=(xi,yi,zi)∈R ^3 satisfy xi^2+yi^2+zi^2 ≤1.
June 6, 2013

heeeeeeeeeeeelp physics vrey tough
please sir answer
June 4, 2013

English
Can someone check if these sentences are grammatically correct? Thank you very much in advance. 1) I never have my cat washed. I wash it myself. 2) I take my cat to the vet once a year to have it examined. 3) The teacher told his students to open their books at page 30. 4) The...
June 4, 2013

English
Can someone check if these sentences are grammatically correct? Thank you very much in advance. 1) I never have my cat washed. I wash it myself. 2) I take my cat to the vet once a year to have it examined. 3) The teacher told his students to open their books at page 30. 4) The...
June 4, 2013

Math
its wrong
June 4, 2013

Math
Express the answer in degrees-minutes-seconds format. 5(29deg 36' 30")
June 3, 2013

math
$35.98 is accurate
May 30, 2013

Math
In triangle ABC, points D,E,F are on sides BC,CA,AB respectively such that AD,BE,CF are angle bisectors of triangle ABC. The lines AD,BE,CF are concurrent at I, the incenter of triangle ABC. If ∠BAC=92∘, what is the measure (in degrees) of ∠EIF?
May 27, 2013

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