Questions Asked on
July 24, 2012

physics
An electron and a proton have charges of an equal magnitude but opposite sign of 1.6 1019 C. If the electron and proton in a hydrogen atom are separated by a distance of 5.4 1011 m, what are the magnitude and direction of the electrostatic force exerted
asked by kkpdiluvu 
science
A sample of air contains 32.7 µg/m3 of beryllium dust. How many atoms of beryllium are present in a room with dimensions of 8 feet by 13.6 feet by 15.6 feet? Answer in units of atoms
asked by hanan 
chemistry
Silver tarnishes (turns to Ag2S) in the presence of oxygen and hydrogen sulfide according to the following equation: 4Ag(s) + 2H2S(g) + O2(g) ¨ 2Ag2S(s) + 2H2O(l) Usually, H2S is the limiting reactant. If a silver spoon is placed in a container that
asked by Big Trav 
chemistry
For the equation, SO2(g) + 1/2 O2(g)> SO3(g) Kp=9.5 EQUAL partial pressures of SO2 and O2 are placed in an empty reaction vessel and heated to 600 degrees celsius. Assuming that 62% of the SO2 partial pressure has reacting to give S03, calculate the
asked by kellie 
chemistry
A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution. The pH after the addition of 10.0 mL of NaOH is __________.
asked by katie 
math advanced functions
a) Determine the measure of the central angle that is formed by an arc length of 5 cm in a circle with a radius of 2.5cm. Express the measure in both radians and degrees, correct to one decimal place. b) Determine the arc length of a circle in part a) if
asked by ashley 
accounting
1. Present entries to record the following summarized operations related to production for a company using a job order cost system: Please put a DR before your debits and and CR before credits and enter between each entry. (a) Materials purchased on
asked by Kassai 
physics
Two positive charges, each of magnitude 2 106 C, are located a distance of 17 cm from each other. (a) What is the magnitude of the force exerted on each charge?
asked by kelly 
Chemistry
What is the value of K for this aqueous reaction at 298 K? A+B C+D delta G= 23.41 kJ?
asked by Quinton 
chemistry
how much heat is required to melt 15 g of ice which is at a temperature of 0 degrees celsius
asked by johny 
english
Please read the following excerpt from an essay, and answer the question that follows. I've never actually met a real live humorist. Well, not in person at any rate. However, one summer, having a lot of time on my hands, I discovered unexpected treasures
asked by tasha Bash 
math
The earth is approx. a sphere. Its diameter is about 12 730 km. Water covers approx. 66 percent of the earths surface. How many square kilometres of land covers the earth?
asked by tiffany 
Science
A solution contains 0.01M ethyl acetate, 0.10M acetic acid and 0.10M ethanol. For the same equilibriujm constant of 2.00, calculate the equilibrium concentrations of ethyl acetate, ethanol, and acetic acid in the solution.
asked by Eric 
chemistry
A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution. The pH after the addition of 10.0 mL of NaOH is __________. A. 0.413 B. 0.386 C. 0.163 D. 0.579 E. 0.237
asked by katie 
Chemistry
A critical reaction in the production of energy to do work or drive chemical reactions in biological systems is the hydrolysis of adenosine triphosphate, ATP, to adenosine diphosphate, ADP, as described by ATP(aq) +H2O (l) >ADP(aq) +HPO4^2 for which
asked by Quinton 
algebra
$5650 is compound semiannually at a rate of 16% for 14 years how much is the total amount in the compound interest account?
asked by louise 
American Government
How did people vote during colonial times? A. by machine B. by punch cards C. by voice D. by paper ballot I believe its either by paper ballot or voice
asked by Ruqiyah 
Physics
A 2.0kg piece of steel with a temperature of 70°C is submerged in 1.0 kg of water at 15°C. At what temperature does the water/metal system reach equilibrium? The specific heat of steel is 0.107 cal/(g × K)."
asked by James 
Pharmacy math
concentrated hydrochloric acid is a 38% solution of hcl in water and has a density of 1.18g/ml. How many milliliters of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 hcl solution? Who helps me to solve it for me. I think 2.12 ml is
asked by Fai 
college algebra
2 log x log 9=log 441
asked by faylinn 
English 3
Pronouns that introduce adjective clauses and relate to words or ideas which precede them are called _____. A.) antecedents
asked by Amy 
chemistry 12
2Li^++2I^==>2Li+I2 would 2I^ be oxidised and 2Li be reduced reaction?
asked by dany 
math
if you want to save $60000 in 7 years with APR 4% daily compounding and no additional deposits, how much would your initial deposit be
asked by kitty 
chemistry
If the rocket engine contains 1500.0 grams of H2O2 and an excess of N2H4, what volume of water vapor will be produced when the rocket fires up to a temperature of 540°C and a pressure of 1.2atm?
asked by Big Trav 
nonfiction
Thoreau writes that people should be "mining themselves for gold".By this he is stating in another way the ideal of Socrates which was to A.deny thyself to learn what is valiable B.live and let live C.put first things first D.know thyself my answer is B
asked by Anonymous 
algebra
Lunc Capacity: The polynomial 0.041h0.018A2.69 can be used to estimate the lung capacity, in liters of a female find the lung capacity of a 40year old woman who is 165 cm tall.
asked by Anna 
American Government
Which of the following is an example of indirect lobbying? A. testifying before Congress B. writing speeches and legislation C. grassrootsled phone calls and email D. contacting White House officials i think its c
asked by Ruqiyah 
chemistry
A steel container with a volume that cannot change is filled with 123.0atms of compressed air at 20.0°C. It sits out in the sun all day, and its temperature rises to 55.0°C. What is the new pressure?
asked by Big Trav 
Government vocab
A. general election B. propaganda C. conventions D. open primary E. soundbite F. interest group G. trade union H. grassroots I. closed primary J. public policy K. nomination L. runoff primary M. lobbying N. blanket primary O. mandate 1.The
asked by Alex 
nonfiction
Thoreau writes "When our lives cease to be inward and private ,conversation degenereates" to because A.seeking an advantage over others B.a fantasy about fiction C.mere gossip D.mindless and sterile my answer is C
asked by Anonymous 
chemistry
A steel container is filled with 5.00atm of nitrogen, 2.00atm of oxygen, and 0.50atm of argon. What is the total pressure in the vessel and the mole fraction of each gas?
asked by Big Trav 
Accounting
I need some help with this question… It is confusing me… I have parts of it done but would like someone to help explain it to me. A truck was purchased on January 2 at a cost of $60,000. It’s expected to be used for five years and to have a residual
asked by sady 
Physics
The weight of an object is the same on two different planets. The mass of planet A is sixty percent that of planet B. Find the ratio of the radii of the two planets, rA/rB
asked by Chad 
physics
A 24.0 kg backpack is suspended midway between two trees by a light cord as in the figure (Figure 1) . A bear grabs the backpack and pulls vertically downward with a constant force, so that each section of cord makes an angle of 27 degrees below the
asked by Anonymous 
chemistry
7H2O2(aq) + N2H4(g) ¨ 2HNO3(g) + 8H2O(g) If the rocket engine contains 1500.0 grams of H2O2 and an excess of N2H4, what volume of water vapor will be produced when the rocket fires up to a temperature of 540‹C and a pressure of 1.2atm?
asked by Big Trav 
Physics
Which one of the following will form a standing wave: (1) two waves of the same amplitude and speed moving in the same direction (2) two waves of the same amplitude and speed moving in the opposite directions, (3) any two traveling waves can form standing
asked by James 
Math
The null and alternate hypotheses are: H0: π1 ≤ π2 H1: π1> π2 A sample of 100 observations from the first population indicated that X1 is 70. A sample of 150 observations from the second population revealed X2 to be 90. Use the .05 significance level
asked by John 
Math Word Problem
Debbie traveled by boat 5 miles upstream to fish in her favorite spot. Because of the 6mph current, it took her 20 minutes longer to get there than to return. How fast will her boat go in still water? (Please round your answer to one decimal place.)
asked by Lisa L 
physics
A ball with a mass of 4·kg is moving in a vertical circle at the end of a 0.9·m long rope. When the ball is at the top of the circle, it is going 7·m/s. What is the tension in the rope? (Again...don't need the answer...just the formula on how to find
asked by bethany 
math
2x(z1)+8x
asked by Anonymous 
chemistry
What is the amount of heat required to turn 1 g of ice into vapor directly without forming a liquid first?
asked by mary 
American Government
Which of the following does not today fit into any of the four categories of minor parties? A. the Know Nothing Party B. the Green Party C. the Bull Moose Progressive Party D. the Communist Party I think its b
asked by Ruqiyah 
Physics
A 565 N mountain climber moves across a rope strung across a canyon. When she is more than halfway across, she notices the rope makes a 10 degree angle (from horizontal) behind her and a 25 degree angle (from horizontal) ahead of her. What are the tensions
asked by Chad 
science
How many milliliters of 4.6 M HCl must be transfered from a reagent bottle to provide 16 g HCl for a reaction? Answer in units of mL
asked by hanan 
Physics
A car, starting from rest, accelerates down a hill reaching 30.0 m/s in 6.00 s. During this time, the driver notices that the fuzzy dice hanging by a string from the ceiling is perpendicular to the ceiling. Find (a) the angle θ of the hill and (b) the
asked by Chad 
physics
A ball with a mass of 4·kg is moving in a vertical circle at the end of a 0.9·m long rope. When the ball is at the top of the circle, it is going 7·m/s. What is the tension in the rope? (Again...don't need the answer...just the formula on how to find
asked by bethany 
English
What is the verb in "where are my shoes"
asked by Will 
programming
Given a = 5, b=1, x=10, and y =5, create aprogram that outputs the result of the formula f = (a b)(x y) using a single printf() function. B> Create a program that uses the same formula above to output the result; this time however, prompt the user for the
asked by Emily 
American Government
What is the task of a party’s chairperson and the party’s national committee between elections? A. create campaign advertisements B. create volunteer opportunities C. break up the central structure of the party D. increase the power of the party I has
asked by Ruqiyah 
accounting
Prepare a monthly Cash Budget in tabular form for the months of February, March and April; showing the bank balance at each month's end. Company Information and Background The following data is available from the various functional budgets prepared at
asked by Jasmine 
Chemistry
How would I calculate the heat of solution in Joules for dissolving 0.1 mole of NH4NO3 in 100 mL of water? The initial temperature was 22.8 degrees celsius and the temperature after the salt dissolved was 18.1 degrees celsius.
asked by Zach 
Math Word Problem
Steve's boat will go 14 miles per hour in still water. If he can go 13 miles downstream in the same amount of time as it takes to go 10 miles upstream, then what is the speed of the current? (Please round your answer to one decimal place.)
asked by Lisa L 
English 3
A dependent clause is also called a(n): adverb clause subordinate clause adjective clause
asked by Billy 
physics
two charged plates are 2mm apart. An electron escapes from the negatively charged plate and reaches the positively charged plate in 1.2*10^8 seconds. Find the electric field between the plates?
asked by Nowah 
chemistry
i had 2 question left to finish but i cant really undersdand how to do it 9)design an elextrochemical cell using Pb(s) and Mn(s) and theire solutions and answer the following questions: i answerd ai all that is left is j which is: indicate the substance
asked by sam 
Chemistry
8 mL of 2.5 M phosphoric acid is neutralized with 500 mL of potassium hydroxide. What is the concentration of the base?
asked by Mustafa 
math
A person has invested $6000 . Part of the money is invested at 3% and the remaining amout at 4% . The annual income from the two investment is $225.How much is invested at each rate?
asked by ana 
chemistry 12
use the standard potential reduction potentials table to balance the following redox equation: H2O2+I+H+==>H2O+I2 would what i did be correct H2H2+I^+H^+==>H2O+I2 H2H2+H^+==>H2O And I^==>I2 Give us H2H2(aq)+2H^+(aq)+2e==>2H2O(l) And 2I^(aq) ==>
asked by dany 
to writeacher
im confuse on when it says : for all tables from two to twelve. does it mean all the tables like: 1 *1, 1 *2, all the way to 12 or does it mean: 2 * 1, all the way to 12?
asked by Celest 
geometry
One thousand raffle tickets are sold for 4.00 each. one grand prize of $800 and two consolation prizes of $ 100 each will be awarded. Jeremy purchases one ticket. Find his expected value.
asked by angela 
Physics
An ice skater slides (without pushing) across a frozen pond for 25.0 m before coming to a stop. If the coefficient of kinetic friction is 0.050, how fast was the skater initially moving?
asked by Zac 
Dressmaking and design
Dressmaking and design PRAC EXER FOR INSTRUC PACK 4 04281800 7. In terms of style, wearing clothes in proper scale means A. being able to wear expensive clothes in a smaller size. B. being able to wear the smallest size possible. C. wearing clothes in
asked by Anonymous 
Biology
What does it mean that an anterior cruciate ligament resists anterior translation and internal rotation?
asked by Carla 
CJS/210
I need help finding reliable information on the following questions? What trends are currently affecting policing? What are some foreseeable critical issues that may affect policing in the future? What changes may need to be made to effectively address
asked by Sade C 
Math
Steve's boat will go 14 miles per hour in still water. If he can go 13 miles downstream in the same amount of time as it takes to go 10 miles upstream, then what is the speed of the current? (Please round your answer to one decimal place.)
asked by Josh 
math
Debbie traveled by boat 5 miles upstream to fish in her favorite spot. Because of the 6mph current, it took her 20 minutes longer to get there than to return. How fast will her boat go in still water? (Please round your answer to one decimal place.)
asked by Josh 
Math
John takes 2 hours longer than Andrew to peel 400 pounds of apples. If together they can peel 400 pounds of apples in 7 hours, then how long would it take Andrew to peal the apples working alone? Please round your answer to three decimal places.
asked by Josh 
physics
A 1.79 kg block slides across a horizontal surface directly toward a massless spring with spring constant 5,300 N/m. The surface is frictionless except for a rough patch of length 0.45 m that has coefficient of kinetic friction 0.28. The initial velocity
asked by Mike 
chemistry
6mg of bezoic acid equal to 6mg of sodium benzoate? If dissolve 6mg of sodium benzoate in acid, will get back 6mg of benzoic acid? Thanks.
asked by Sodium benzoate 
economics
assume a 10 percent sales tax is levied on all consumption, complete the following
asked by Anonymous 
College Math
Why is the product of two numbers not always their least common multiple?
asked by Wanda 
nonfiction
Thoreau's night in jail for tax deliquency resulted specifically form A.the publication of his work cicvil disobedience B.having moved his place of his residence from concord to walden pond C.a decision to act on his belief that least government was best
asked by Anonymous 
Algebra
Add these 2 polynomials (21t+8)(4t) and (3t4)(2t) 84t^2+32t 6t^28t I got this far isnt there another setp to do this is the part I am having difficulty with.
asked by Anonymous* 
algebra
Add these polynomals. (21t+8(4t) and (3t4)(2t) 84t^2+32t 6t^28t I got this far but isnt there another setp I am forgetting?
asked by Anonymous* 
Physics
A box starting from rest, slides down an incline which makes an angle of θ above the horizontal. The incline has a maximum height of h above the platform on which it sits which is itself H above the ground. The box leaves the end of the ramp and
asked by Chad 
Physics
starting from ypur house, run 2oom east at an average speed of 4m/s, then turn around and run 280m west at an average spped of 7m/s to a post. 1) calculate Average velocity from house to post
asked by carak 
Algebra
Divide and check: (3x^22x13)divided by (x2)
asked by Anna 
physics
two charged plates are 2mm apart. An electron escapes from the negatively charged plate and reaches the positively charged plate in 1.2*10^8 seconds. Find the electric field between the plates?
asked by Nowah 
Math
The length of a rectangle is 1 more than the side of a square and the width of the rectangle is 1 less than the side of the square. of the area of the rectangle 35, find the length of the side of the square.
asked by Eva 
math grade 12
2. An isotope of sodium has a halflife of 15 h. A sample of this isotope has a mass of 2 g. a. [2] Find the mass equation that remains after t hours. b. [1] Find the mass that remains after 5 hours, to the nearest hundredth. c. [2] How long, to the
asked by kim 
physics
A 1100·kg elevator is attached to a cable whose tension is 11100·N. What is the magnitude of the elevator's acceleration?
asked by bethany 
science
what shows that the sea water is a mixture and not a pure substance? a. it has a sharp boiling point b. it has definite composition c. it consist of a single phase d. the components lose their individual properties
asked by Rexy 
Science
Calculate the pH of an aqueous solution containing 1.3 * 10^2 M HCl, 3.0 * 10^2 M H2SO4, and 2.0 * 10^2 M HCN.
asked by Will Coppock 
Math
I don't understand this it says If the average of 6 numbers was 58, what could the 6 numbers be? That would take forever to work out. What is the easiest way to work that out
asked by Sarah 
algebra
Factor. 125r^2245
asked by Christina 
nonfiction
Tecumseh was a cheif of the A.pequot B.pawnee C.shawnee D.chocataw my answer is C
asked by Anonymous 
Math  Trigonometry
Sketch the curve represented by the parametric equations x=3cos¦È and y=3sin¦È for 0 ¡Ü ¦È ¡Ü ¦Ð?
asked by Anonymous 
algebra
solve the equation 5x^2=19x+4 X=
asked by Nancy 
english
a group of tourists is being led through a famous cathedral by a guide. one family of four is japenese, but at least three other tourist in the goup ar not. All but five of the group are american what is the least number of tourists that can be in this
asked by Niki 
question
if you have a chance of 1 out of 60 of your baby having down syndrome is it bad?
asked by mara 
physical
in a millking oil drop eperiment horizontally place are 0.5cm apart when there is no p.d across the plate the terminal speed of an oil drop is 1.75*1045ms if thr potentail supply is switched on with the upper plate positve the drop is observed to remain
asked by ishaku 
multiplication
what does it mean when it says : create your own set of multiplication flash cards for all tables from two to twelve. iam confused.
asked by Celest 
multiplication
what does it mean when it says : create your own set of multiplication flash cards for all tables from two to twelve. do we make the cards starting from 1? example; 1*1=1, 1*2=2 (all the way to twelve. or: 2*1= 2, 2*2=4, 2*3=6 (all the way to twelve)
asked by Celest 
college algebra
2 log x log 9=log 441
asked by faylinn 
Calculus
The area is bounded by y= x^3, x= 2 is rotated around the xaxis. Find the volume using calculus.
asked by Ted 
algebra
Factor by grouping. 20s^3+65s^260s
asked by Christina 
GOVERNMENT
A. Westside v. Mergens B. Texas v. Johnson C. Roe v. Wade D. Bethel v. Fraser E. Dennis v. U.S. F. Lemon v. Kurtzman G. Wallace v. Jaffree 1.Established that a woman's reproductive right is guaranteed as part of the right to privacy; set the precedent for
asked by Alex 
algebra**
Consider the sample space S = {1, 2, 3, . . ., 10}. Let A = all odd numbers in S. Let B = all multiples of 5 in S. Compute P(B  A). Enter your answer as a fraction using the "/" and do not include spaces in your answer.
asked by Anonymous 
math advanced functions grade 12
Find the solution set to the following rational inequality, 240/x+8 > 20x/x+1
asked by illiah 
CJS/230
Will someone please help me find a webite to answer the following questions? What are community corrections? How do community corrections affect the society in which they are practiced? What hypothesis can you make about community corrections and their
asked by Sade C 
physics
An unknown force pushes a 17 kilogram block across a smooth (frictionless) floor. Three seconds after the force is first applied to the block, the block is moving with a speed of 6 meters per second. What is the magnitude of the unknown force?
asked by Anonymous 
math
1/9  (k+3)/(72K) = 1/(9k)  (k1)/(8k)
asked by Josh 
math
In vanessa's coin bank there are 4 times as many quaters as nickels, 2 fewer dimes than nickels, and 15 pennies. the total amount in the bank is $5.80. How many of each coin are in the bank? assign a variable to unknown and write an equation to find
asked by Niki 
science
Low water flows are a common problem for ecosystems in semiurban streams. Should the suggestion of using domestic drinking water supplies to increase water flows in the streams be adopted?
asked by Anonymous 
Integrated Math 1 (help please??:( )
Consider the sample space S = {1, 2, 3, . . ., 10}. Let A = all odd numbers in S. Let B = all multiples of 3 in S. Compute P(B  A). Enter your answer as a fraction using the "/" and do not include spaces in your answer.
asked by Tifini 
math
what does it mean when it says create your own set of multiplication flash cards for all tables from two to twelve
asked by Celest 
Trig
Claim: For all theta such that pie/2
asked by Chay 
math
a convenience store sells 1650 items,are of 12/25 junk food
asked by martha 
algebra
Factor the trinomial. 5c^c70c+200
asked by Christina 
math
what are the intervals to be conidered when finding the solutions in 4/6x4  2/2x+2 please help. i am so lost and confused
asked by ted 
Integrated Math 1
A rolling stone may take two different paths. On path 1, it takes 10 seconds for it to reach the bottom of the hill, while on path 2, it takes it 15 seconds. It is twice as likely to go on path 2. How long does it take it on average? Round your answer to
asked by Anonymous 
algebra
Find the number of decibels for the power of the sound. round to the nearest decibel. A rock concert, 5.35x 10^4 watts/cm^2
asked by Nancy 
algebra*
Multiply (x^10+3)(x^103)
asked by Anna 
math
A rolling stone may take two different paths. On path 1, it takes 10 seconds for it to reach the bottom of the hill, while on path 2, it takes it 15 seconds. It is twice as likely to go on path 2. How long does it take it on average? Round your answer to
asked by Anonymous 
college stat
Use the graphic to show the sampling distributions of means for the sample from Prison A (n=82) and the sample from Prison B (n=37). Mark the expected value of the mean and the standard units. Shade in the critical zone for alpha = .05.Locate each sample
asked by sammy 
MATH
2x3(x+4)= 5 The answer is 7 , but I am unable to get this answer. tried working problem several ways get different answers for ex. I get 17 or 7 Please I need some help
asked by SARA 
Math
How do I find a formula for find Total Cost?
asked by Lind 
math
(14d+16+24d)11+2(3d2) Please help or give formula.
asked by Barb 
math
how do you solve this inequality 3x2 < x+4/x2 please help i don't get it
asked by ted 
Calculas
Find the length of the curve y=ã(2x), from x=1 to x=4.
asked by Drew 
PHYSICS HELP!
IMAGINE a building 6400km. high. On the ground floor, a person weighs 175lbs when he steps on a spring scale how much would the man weigh on the same scale if he were standing at the top floor? HINT: Note that 6400km is also the radius of the earth so
asked by Anonymous 
math
3/4+7/12(5/6) the answer I get is o.6666667.
asked by barb 
medical assisting
how does an understanding of law and ethice help medical assistants at work?
asked by gwen 
Art
Is the Perigueux an example of Byzantine architecture?
asked by Anonymous 
Math
5x/(x4) = x + 20/(x4)
asked by Josh 
Math
(b+27)/(b^(2)1)  1/(b+1) = (b2)/(b1)
asked by Josh 
voice
we shall be taking tea
asked by sumon 
AMERICAN LIT
WHAT DOES MR. WILSON TELL BRYD AND HIS COMPANION?
asked by MICHAEL 
Math
ind thearea bounded by y= 0.5x+6, y= 1/4 x and the yaxis.
asked by Paul 
Math
12/x + 3/(x3) = x/(x3)  1/11
asked by Josh 
Math
6/(a^(2)+a6) = 4/(a^(2)9)
asked by Josh