Sunday
December 11, 2016

# Posts by Bob

Total # Posts: 3,145

Trig
A car is traveling at a speed of 55 mph with a bearing of 210°. What vector represents the velocity?
July 28, 2011

Math
How much of 20% alcohol solution and 50% alcohol solution must be mixted to get 9 liters of 30% alcohol solution?
July 27, 2011

Chemistry
1. True 2. true 3. true 4. false 5. true
July 19, 2011

Physics
hjfhjhf
July 11, 2011

Math
Ice Dreams finds its profit from the sale of ice cream increases by \$30 per week during the 9 weeks of student summer holidays. Find the profit for the summer season if the profit for the first week of the summer is \$100.
July 8, 2011

math
a salesperson ears a salary of 17,000 per year. she also makes a commission of 14% on her saes. if her sales for the year total \$120,000, how much money was she paid for the year?
July 6, 2011

Physics
A 0.02 kg-lead bullet traveling 200 m/s strikes an armor plate and comes to a stop. If all of it's energy is converted to heat that it absorbs, what is the temperature change?
June 25, 2011

Algebra 1
Thanks
June 23, 2011

Algebra 1
The term difference mathematically is for subtraction?
June 23, 2011

Algebra 1
What is the difference of 17 and 5 times a number?
June 23, 2011

Physics
June 20, 2011

westernncilvilization II
What do these readings tell you about Napoleon’s opinion of the Republic and the Enlightenment ideals which originally informed the course of the Revolution?
June 17, 2011

Physics
The displacement of a linear damped oscillator is given, for weak damping by x=Ke^(-bΩt) sin⁡(βt+ ε) Show x has a maximum at times given by βt = 2nπ + d where n is an integer and d is gives the position of the first maximum Show also that the ...
June 10, 2011

Physics
You should know this!
June 9, 2011

chemistry
About how much should the boiling point of pure water differ from .5m 1m and 1.5m aqueous solutions of NaCl and same molal solutions of CaCl2 Trying to check experimental data from van't hoff factor lab
June 4, 2011

world history
at the end of the eighteenth century, _____ who had the largest economy in the world. a. india b. britain c. spain d. china I'm almost sure its b. can someone tell me if im correct?
June 2, 2011

world history
in what regions did latin christendom expand during the period of the early mongol expansion?? britan and spain the middle east and spain prussia and north africa finland and estonia I answered middle east and spain am i correct
June 1, 2011

history
then it has to be maize farming
May 31, 2011

history
the economic security of the inca empire was based on intensive maize farming enviromental diversity extensive trade with the aztec empire ruthless massacres of enemy peoples my answer is enviromental diversity is that correct
May 31, 2011

history
no one knows how it happend, but the islamic world transformed most of the turkic invaders into its strength and shield. The newley converted turks conqured anatolia an Armenia from christians.
May 31, 2011

history
no one know how it happend, but the islamic world transformed most of the turkic invaders intom its strenght and shiled. The newley converted turks conqured anatolia an Armenia from christians.
May 31, 2011

history
ok then it must be (a) the way they word everything makes it confusing
May 31, 2011

history
12. Within the Islamic Empire, the Turkic people A. were completely integrated into the Arabic world. B. were mainly concerned with trade and commerce. C. acted as a powerful military shield. D. were educated people who administered the realm. c seems correct -- can someone ...
May 31, 2011

history
In his famous sermon of 1095, Pope Urban II saw Christian Europe as A. only a small part of Europe and an even smaller part of the larger world. B. being evenly divided among Europe, Africa, and Asia. C. a military and economic powerhouse that had always been on the rise. D. ...
May 31, 2011

HISTORY
ACTUALLY ITS A AM I CORRECT
May 31, 2011

HISTORY
Which of the following is an example of new economic divisions in the European peasantry that began to occur during the fourteenth century? A. Peasants living east of the Elbe River became freer. B. Peasants living west of the Elbe River became freer. C. Peasants throughout ...
May 31, 2011

world history
Can someone please check my answers?? 1. A period of global cooling from the fourteenth to the nineteenth century is historically referred to as A. nominal cyclical cooling. B. the Little Ice Age. C. the Celsius effect. D. the Fahrenheit effect. 2. The economic security of ...
May 29, 2011

history
To find new territory for a growing population, the Song rulers A. purchased lands from neighboring peoples. B. colonized underpopulated areas to the southwest. C. sent people to unpopulated regions to the north. D. conquered territories by military force can someone check my ...
May 29, 2011

world history
which of the following practices did the ottomans use to strengthen their state?? missionaries were sent to remote areas to generate wealth the practice of religions other than islam was forbidden gifts where given to those who converted to islam christian children were ...
May 29, 2011

history
is establishment of a stsble ,coherent government across eurasia is this correct
May 29, 2011

history
what was the most important outcome of mongol peace spread of western ideas to the east spread of islam transfer of goods and technology from east to west or establishment of a stsble ,coherent government across eurasia
May 29, 2011

world history
How did the rulers of the Canyon peoples deal with the environmental challenges that their region presented? A. They allowed high levels of citizen participation in the running of their local communities. B. They developed a remarkable level of exchange with the Mississippian ...
May 29, 2011

history
What was the most effective remedy for plague? A. Snake venom B. Quarantine C. Abstaining from eating certain foods D. Armenian clay can someone help i found quarantine saved lives in the book. but im not sure if snake venom is the answer cause i cant find anything in there
May 29, 2011

world history
During the fourteenth century, Japanese women of aristocratic rank A. saw marriage customs change to their detriment. B. were transformed because of their ability to hold their own property separately from their husbands. C. became freer due to the stability of the times. D. ...
May 28, 2011

Math
\$474.94
May 28, 2011

math
Find a function f which satisfies the integral equation Int(bounded from 0 to x) t*f(t)dt = Int(bounded from x to 0)(t^2+1)*f(t)dt +x
May 27, 2011

math(easy integration)
thanks a lot..
May 27, 2011

HISTORY
What was the most effective remedy for plague? A. Snake venom B. Quarantine C. Abstaining from eating certain foods D. Armenian clay
May 27, 2011

HISTORY
WHAT WAS THE MOST EFFECTIVE REMEDY FOR PLAGUE
May 27, 2011

HISTORY
13. In Mongol society, the expression "crane catching" referred to A. the popular pastime of hunting birds. B. the success of Mongol merchants in establishing long-term contracts with buyers. C. successful leaders forcing submission from rivals. D. a mysterious ...
May 26, 2011

math
Three water pipes are used to fill a swimming pool. The 1st pipe alone takes 8 hours to fill the pool, the 2nd pipe alone takes 12 hours to fill the pool, and the 3rd pipe takes 24 hours to fill the pool. If all 3 pipes are opened at the same time, how long will it take all 3 ...
May 26, 2011

math
Claire is 15 years old today. This is 5 times as old as her sister margaret was when claire was the age that margaret is today. How old is margaret today?
May 26, 2011

HISTORY
1. How did the rulers of the Canyon peoples deal with the environmental challenges that their region presented? A. They allowed high levels of citizen participation in the running of their local communities. B. They developed a remarkable level of exchange with the ...
May 25, 2011

Physics
May 25, 2011

Statistics
The Sydney Airport Commission set a performance target of 18 minutes for the time taken for passengers to claim their luggage at domestic terminals. In order to monitor performance a study was conducted by taking a random sample of 200 passengers disembarking from Sydney ...
May 24, 2011

physics
A 2.7 kg box is released on a horizontal surface with an inital speed of 2.9m/s. It moves on the surface with a deceleration of 0.27m/s^2. Calculate the kinetic friction force on the box?
May 23, 2011

Chemistry
Is it 5 degrees Celsius?
May 19, 2011

Chemistry
How many d electrons are there in MnO4-? please explain.
May 18, 2011

chemistry
Use Nernst. 0.61=0.79-(0.0592/2)*log 0.20/x -0.18=-0.296*log 0.20/x 6.0810811=log 0.20/x 1205260.93387=0.20/x x=1.6593917083*10^-7
May 17, 2011

Statistics
I have won exactly 72% of the 2400 puzzles that I played. What is the minuimum number of puzzles I must win before I have to win 73% of the total number of puzzles played?
May 16, 2011

american gov
Journalists from which country are most likely to say that they should be as nonpartisan as possible in their reporting? a. Germany b. Sweden c. United States d. Britain e. Italy i think its C? am i right
May 13, 2011

physics
134MeV
May 12, 2011

math
find the value of n so that x2-n=0 has solutions at x=8 and x=-8
May 11, 2011

math linear equations
how do u make a linear equation from a data table??
May 9, 2011

chem
Ascorbic acid, H2C6H6O6, is a diprotic acide with a K1= 7.9 E-5 and a K2=1.6E-12. In a .005 M aq solution of ascorbic acid which of the following species is present in the lowest concentration. 1. H2O 2. H3O+ 3. H2C6H6O6 4. HC6H6O6- 5. C6H6O6-2
May 5, 2011

chem
Ascorbic acid, H2C6H6O6, is a diprotic acide with a K1= 7.9 E-5 and a K2=1.6E-12. In a .005 M aq solution of ascorbic acid which of the following species is present in the lowest concentration. 1. H2O 2. H3O+ 3. H2C6H6O6 4. HC6H6O6- 5. C6H6O6-2
May 5, 2011

math
distribute. (8t-3)(t^2+2t+9
May 4, 2011

math
How do you convert feet to mph?
May 3, 2011

math
51.05
May 3, 2011

English-cry the beloved country
Cry, the Beloved Country refers at various points to the fear that exists in South African society. According to the novel, what are the causes of this fear and what are the consequences of this fear? Include evidence from the novel to support your response. In Chapter 7, ...
May 2, 2011

Chemistry
what is the theoretical yield of Sodium Hydroxide
May 2, 2011

math
no actully 1/8
May 1, 2011

math
i'm not a hundred percent sure but i think its 2/12 so 1/6
May 1, 2011

math
a bootlenose dolphin jumps out of the water. the path the dolphin travels can be modeled by h=-0.2d^2+2d, where h represents the height of the dolphin in feet and d represents the horizontal distance. What is the maximum height the dolphin can jump?
May 1, 2011

geometry
Find the equation of the line that passes through the point P (-6, 8) and Q (-6, 12), and use the information to answer the question.
April 28, 2011

Algebra
Use Gauss-Jordan to solve 3x + 2y = -4 4x – 2y = -10
April 26, 2011

Chemistry
It's a multiple choice answer. I need to choose one. I don't know which one, and it would help if there was an answer and explanation to it.
April 21, 2011

Chemistry
Functional groups 1. are the repeating unit of polymers. 2. are groups of atoms whose chemical prop- erties are pretty much independent of their chemical environment. 3. perform specific biological functions using molecular recognition. 4. are a fictitious concept like ...
April 21, 2011

statistics
In a study of the effect of college student employment on academic performance, the following summary statistics for GPA were reported for a sample of students who worked and for a sample who did not work.( university of central florida undergraduate research journal, spring ...
April 20, 2011

statistics
Each person in random sample of 247 male and 253 female working adults living in Calgary, Canada was asked how long, in minutes, his or her typical daily commute was. use the accompanying summary statistics and an appropiate hypothesis test to determine if there is convincing ...
April 20, 2011

statistics
A recent national survey reported that the general population gave the president an average rating of m= 60 on a scale of 1 to 100 with 1 being most unfavorable, and 100 most favorable. A reseracher at IC hypothesizes that IC students are more critcal of the president than the...
April 20, 2011

chemistry
220 ml of an HCl solution that is 31.4% by mass is required to neutralize .50 gal of the chlorine solution. what is the molarity of the OH- of the clorine solution? chlorine solution is NaOCl in NaOH
April 19, 2011

Chemistry
If you were to prepare a 1.00 molal solution of CaCl2 beginning with water at 27.0 C, what would the final temperature of the solution be (in C)? Assume that the specific heats of both pure H2O and the solution are the same, 4.18 J/K*g. The dissolution of CaCl2 in water is ...
April 18, 2011

algebra2
3. Graph the function f(x) = –3x3 + 9x2 – 2x + 3 using graphing technology and describe the end behavior.
April 16, 2011

trig
Graph this trigonometric function. y=-4cos(x/2+3.14)+1
April 15, 2011

Physics
A child having a mass of 45 kg sits 0.5 m from the center of a merry-go-round that is rotating with a period of 23 s. What is the centripetal force acting on the child?
April 13, 2011

Earth science
Broad areas of folded rock layers that resemble an upside-down bowl are called
April 13, 2011

Chemistry
40.0 ml of an acetic acid of unknown concentration is titrated with 0.100 M NaOH. After 20.0 mL of the base solution has been added, the pH in the titration flask is 5.10. What was the concentration of the original acetic acid solution? (Ka(CH3COOH) = 1.8 × 10−5)
April 10, 2011

Physics 20
dynamics A curling stone has a mass of 20kg. a curler pushed the stone across the ice to launch it down the rink. a)if the curler starts to move the stone by pushing it with 15N, what is the stones initial acceleration? b)once moving, how much force is required to keep the ...
April 6, 2011

Science
Blood from all parts of the body, exept the lungs goes to what part of the heart
April 6, 2011

english
Whats the opposite of seditious
April 5, 2011

physics
A straight ladder is leaning against the wall of a house. The ladder has rails 4.50 m long, joined by rungs 0.470 m long. Its bottom end is on solid but sloping ground so that the top of the ladder is 0.780 m to the left of where it should be, and the ladder is unsafe to climb...
April 4, 2011

Chemistry
This is for a lab about determining the equilibrium constant. Given: 5.00mL of .203M Fe(NO3)3 mixed with 100mL of .00205M KSCN in a .5M HNO3 solvent for both solutions. Resulting absorbance for solution is .315. How can i find the total Fe, [Fe*] and SCN, [SCN*] in the system ...
April 3, 2011

English Honors - Tale of Two Cities
Try reading the book instead of the sparknotes, and you'll see the line points backward, to the death of Gaspard's son under the wheels of the Marquis' speeding carriage. Defarge was present, and witnessed the Marquis love of racing his carriage around, and his ...
April 3, 2011

English
March 31, 2011

PPPPPhysicssssss
and the answer to the second part??
March 31, 2011

Science
A (blank) compound is one that burns regularly
March 30, 2011

statistics
A university dean wishes to estimate the average number of hours his part-time instructors teach per week. The standard deviation is 2.6 hours. How large a sample must be selected if he wants to be 95% confident of finding whether the true mean differs from the sample mean by ...
March 30, 2011

math
i don't think that you guys are helping because your not explaining the answer your giving it how is my child supposed to learn from that?
March 30, 2011

math
274 is 25% of what number?
March 30, 2011

Math
At the city museum, child admission is and adult admission is . On Friday, four times as many adult tickets as child tickets were sold, for a total sales of . How many child tickets were sold that day?
March 29, 2011

Chemistry
Assuming all volume measurements are made at the same temperature and pressure, how many liters of carbon dioxide gas can be produced when 12.8 liters of oxygen gas react with excess carbon monoxide? Show all of the work used to solve this problem. Unbalanced equation: CO(g...
March 29, 2011