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October 25, 2014

Posts by alex


Total # Posts: 2,643

math
what is 8x3x3 in exponential form
September 23, 2012

chemistry
How many moles of aluminum do 5.9×1024 aluminum atoms represent?
September 22, 2012

physics
A truck driver attempting to deliver some furniture travels 5 km east, turns around and travels 5 km west, and then travels 12 km east to his destination. What distance has the driver traveled?
September 22, 2012

Physics
An athlete springs a circular 400.0 m track in 50.0 s. Asume he runs a constant speed. a. What is his speed over the entire course? b. What is the magnitude of his instantaneous velocity at any point along the circuit? c. If he starts facing west and runs counterclockwise, ...
September 17, 2012

math
A factory can produce two products, x and y, with a profit approximated by P = I think it's b but I'm not really sure. Can someone show me how to do this or let me check my answer? :) 14x + 22y – 900. The production of y can exceed x by no more than 200 units. ...
September 17, 2012

Algebra
(9a^3b^4-12a^2b^5+6ab^7)/(6a^2b^3)
September 17, 2012

environment
The ideal study plan includes which of the following? A. Quality preparation. B. Use of as much different intelligence as possible. C. Both A & C. D. An elaborate study environment.
September 16, 2012

readind
Which is the best way to learn new material? A. Consistently study the same way. B. Review notes every day. C. Use techniques that appeal only to your preferred learning style. D. Use techniques that appeal to all three learning styles.
September 16, 2012

science
Na and K have low first and high second ionization potentials, whereas Mg and Ca have low values for both first and second potentials. These observations suggest that
September 16, 2012

math probability
Assume that Pr[E]=0.55,Pr[F]=0.55,Pr[G]=0.55,Pr[E∪F]=0.85,Pr[E∪G]=0.8, and Pr[F∪G]=0.75. Find: Pr[E' U F]; Pr[F' ∩ G]; and Pr[E ∩ G]
September 15, 2012

english
The chess copetition ended ob time pronoun or noun
September 13, 2012

physics
A jogger accelerates from rest to 5.78 m/s in 3.51 s. A car accelerates from 19.7 to 32.1 m/s also in 3.51 s. (a) Find the magnitude of the acceleration of the jogger. (b) Determine the magnitude of the acceleration of the car. (c) How much further does the car travel than the...
September 13, 2012

physics
A sprinter explodes out of the starting block with an acceleration of + 2.02 m/s2, which she sustains for 1.12 s. Then, her acceleration drops to zero for the rest of the race. What is her velocity at (a)t = 1.12 s and (b) at the end of the race?
September 13, 2012

english
Noun
September 13, 2012

writing
First second next last in conclusion in summary then final first of all second of all
September 12, 2012

Physics(please help, I'm stuck)
A particle with a charge of -1.4 μC and a mass of 2.9 x 10-6 kg is released from rest at point A and accelerates toward point B, arriving there with a speed of 22 m/s. The only force acting on the particle is the electric force. What is the potential difference VB - VA ...
September 12, 2012

Chemistry
C2H4(g) + H2O(l) → C2H5O(l) what is the rendition percentage if 4.50g of C2H4 produce 4.7g of ethyl alcohol?
September 11, 2012

Physics
I have the same problem. Please help!
September 11, 2012

Physics
A projectile is fired straight up at a speed of 13 m/s. How long does it take to reach the top of its motion? The acceleration due to gravity is 9.8 m/s2 .
September 11, 2012

Probability
An urn contains a red ball, a blue ball, an orange ball, and a yellow ball. A ball is chosen one at a time then replaced. This is done 4 times. What is the probability one of each color is chosen?
September 11, 2012

Science
make a statement relating hydrogen ion concentration to the acidity and basicity of solutions
September 10, 2012

science
If a solution A has 10,000 times as many H+ ions as solution B, what is the difference in pH units between the two solutions?
September 10, 2012

Science
5. You have made the following two solutions: X) hydrogen ion concentration = 1 x 10-5M Y) pH = 4 State which statements below are true and which are false: a. Solution X contains 1 x 10-9M hydroxide ions. b. Solution X contains more H+ ions than Solution Y. c. Solution Y ...
September 10, 2012

Biology
make a statement relating hydrogen ion concentration to the acidity and basicity of solutions
September 10, 2012

Biology
If a solution A has 10,000 times as many H+ ions as solution B, what is the difference in pH units between the two solutions?
September 10, 2012

physics
Both car A and car B leave school at the same time, traveling in the same direction. Car A travels at a constant speed of 78 km/h, while car B travels at a constant speed of 88 km/h. How far is Car A from school 2 h later? Answer in units of km
September 8, 2012

Business
Analyze and compare both data sets using the data analysis and biases concepts from Chapter 11 of Sekaran & Bougie (2010).
September 8, 2012

physics
You are on a hike in the mountains. You have 4.92 km left to go before your next campsite. The sun will set in 6.6 h. What avergae speed must you walk to camp at sunset? Answer in units of km/h
September 8, 2012

algebra
Jim is paid for overtime when he works more than 40 hours per week. Write an expression for the number of hours he works overtime when he works h hours.
September 6, 2012

Physical Science
Find the density in g/cm3 of a 800 cm3 piece of metal having a mass of 4 kg.
September 5, 2012

physics
Hello i just worked on this problem, Vf^2=Vo^2+2gh Vf- velocity final Vo-Initial velocity g-gravity h-height Vf^2=(2.60^2) + 2*(9.8)(8.70) Vf^2=177.28 square root it... 13.314m/s Subtract from heli speed, 13.314-2.60= -10.714 negative because up is positive and down well is ...
September 5, 2012

Math
Can you show me how
September 4, 2012

Math
John runs on a daily basis. He jogs 5 miles every day except Saturday. On that day he jogs 9 miles. How many miles will he jog in 4 weeks?
September 4, 2012

Math
Jarrod wants to save $245 to buy a Wii gaming system. If he was saving $35 each month, how long would it take him to have the needed money? 7 months? The border between Texas and Mexico is 248 miles. If there are 32 countries along the border, about how many border miles are ...
September 3, 2012

Physics
A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
August 31, 2012

Physics
A ball is dropped from rest from a height of 20.0m. One second later a second ball is thrown vertically downwards. If the two balls arrive on the ground at the same time, what must have been the initial velocity of the second ball?
August 31, 2012

Pre-calc
Solve 3.3= 1.005^n
August 30, 2012

Physics
A hill that has a 31.4 % grade is one that rises 31.4 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?
August 27, 2012

Physics
A hill that has a 31.4 % grade is one that rises 31.4 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?
August 27, 2012

Physics
A rok is thrown 24 meters/sec upward and lands in a 10 meter deep hole. How long is the rock in the air until it reaches the bottom of the hole?
August 26, 2012

psycology
a professor gives his 100 studebts an axam and everyone gets an A. the exam lacks_______ to detect which students studied and which didn't sample size reliability power significance
August 26, 2012

physics
I have been stuck on this for a while now and cant figure out what it is i am doing wrong HELP!!! A tennis ball with a velocity of 15.5 m/s is thrown perpendicularly at a wall. After strik- ing the wall, the ball rebounds in the opposite direction with a speed of 9.3 m/s. If ...
August 20, 2012

Chemistry
At a certain temperature, .5 mol of PCl5 was placed in a .25 L vessel and permitted to react as shown PCl5 (g) --> PCl3 (g)+ Cl2 (g) At equilibrium, the container held .1 mol of PCl5. What is the value of "K"?
August 20, 2012

Physics
Block A of mass 115 kg rests on a table with which it has a coefficient of limiting friction of 0.37. A light cord passes horizontally from Block A, without slipping, over a pullet of mass 34kg, radius 120 mm and radius of gyration 84mm, and down vertically of block B of mass ...
August 19, 2012

Physics
The drag coefficient = 0.354 The mass of car = 1200 kg rolling resistance = 180 N Air density = 1.181 kg m^-3 Frontal area = 1.88 m^2 What is the deceleration at a speed of 82 km h^-1 when the car is taken up to high speed and then allowed to coast down on a level road.
August 18, 2012

Physics
In a fairground ride a child of mass 37 kg stands against the inside surface of a circular cylinder of radius 3.9m that rotates around its vertical axis of symmetry. The cylinder has an angular speed of 1.3 rad/s and an angular acceleration of 0.12 rad s^-2. What is the radial...
August 18, 2012

algebra
x+1/3=5/6
August 16, 2012

trig
Imagine that you are sitting 6 feet away from a television that is hung on a wall. The top of the TV is 8 feet off the ground. Which function correctly represents the angle that you make with the top of your television?
August 15, 2012

English
12. A 13. D 14. D
August 13, 2012

Physics
Buoyancy. A Team of 6 scouts plan to cross a lake on a raft they designed. The dimensions of each plank is 30 cm x 30 cm x 3m. The density of the wooden planks is of .80. The average mass of the members is 65KG. And for their safety they want the top of the raft to be 3 cm ...
August 13, 2012

geometry
show that the points A(-4,2) B(1,4) C(3,-1) D(-2,-3) are verticies of a square. please show me how to solve this type of math problem.
August 13, 2012

math
show that the triangle with verticies A(8,5) B(1,-2) C(-3,2) is a right triangle, and find its area. the answer to the area is : 28. please show me how to show its a right triangle, thanks!
August 13, 2012

Algebra
Find k, given that (2,k) is equidistant from (3,7) and (9,1). The answer is : k=0 How do I solve this problem?
August 13, 2012

Algebra
Find all intervals on which the given expressions are positive. (x-1)(x+2) I know the answer is : x<-2, x>1 please show me the steps on how to solve this math problem.
August 12, 2012

Algebra
Solve the inequality and express the solution in terms of intervals whenever possible. | x+3 | < 0.01 I know the answer is : (-3.01,-2.99) Please show me how to solve this type of math problem.
August 12, 2012

Math
I need help on how to solve this type of problem please. 29.)Solve the inequality and express the solution in terms of intervals whenever possible. 1/(x-2) ≥ 3/(x+1) THE ANSWER IS: ( -∞,-1 ) U ( 2,(7/2) ]
August 12, 2012

Physics
A crate slides down a ramp at angle 48 degree to horizontal. The coefficient of limiting friction is 0.48. Find the options for the acceleration of the crate down the ramp.
August 11, 2012

Physics
A proposed interstellar space vehicle comprises an accommodation unit of mass 690 Tons at the front, separated by a light tube between the individual centres of mass, which is 43m. The amount of seperation is necessary to reduce levels (from the nuclear engine) at the ...
August 11, 2012

Math
DIRECTIONS:Rewrite without using absolute the absolute value symbol. a. (-5)|3-6|
July 31, 2012

Physics
thanks!
July 30, 2012

Physics
Im still confused on how you solved for V, would you mind plugging in the numbers for me? im completly lost
July 30, 2012

Physics
A motorcycle stuntman must jump from a ramp to a platform. The platform is located 15M away and is 2M higher then the tip of the ramp. The ramp is at a 35Degree angle. At what velocity must he travel as he leaves the ramp in order to reach the platform. Express in KM/h
July 30, 2012

Physics
Thanks alot, I guess my workbook does have a error as it clearly states both as below the horizontal.!
July 30, 2012

Physics
A Football player on team a is movin gat a velocity of 8ms at an angle of 49 below the x axis. He collides with a player on team B, The Player B is moving at 7.5ms at an angle of 41 below the X and has a mass of 110KG after the collision both players remain in contact and move...
July 30, 2012

Physics
A baseball teams ace pitcher throws fast balls at a velocity of 160kmh, the balls are released at a height of 1.6m from the ground, given that the distance between pitcher and plate is 18.4m how far has the ball dropped when it passes over the plate?
July 29, 2012

Government vocab
Thank you!!
July 24, 2012

Government vocab
3.n 4.c 8.j 12.o 15.d
July 24, 2012

Government vocab
6 is correct
July 24, 2012

Government vocab
1.i 2.a 3.d 4.j 5.m 6.e 7.l 8.o 9.k 10.h 11.g 12.c 13.f 14.b 15.n I'm not sure on numbers 3,4,7,8,10,12,13
July 24, 2012

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. run-off primary M. lobbying N. blanket primary O. mandate 1.The ____________________ only allows ...
July 24, 2012

GOVERNMENT
2.a...3part test 5.f... to allow schools to form religious groups.
July 24, 2012

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 all abortion ...
July 24, 2012

social studies
Japan 1 bulldozer 3 cars America 1 bulldozer 2 cars WORLD TOTAL 2 bulldozers 5 cars 8. What is the opportunity cost for America to make 1 bulldozer instead of cars? A) 1 car B) 2 cars C) 1/2 car 9. What is the opportunity cost for Japan to make 1 bulldozer instead ofcars? A) 1...
July 22, 2012

Math
Mckenzie's age is 3 years less than 4 times Alec's age. Lily is 1 year less than Mckenzie. If Alec is 2, how old is Lily?
July 22, 2012

Economics
Then the only other option is A?
July 22, 2012

Economics
Someone advocates using fiscal policy to stimulate the economy and reduce unemployment. Which of the following might this person advocate to implement the fiscal policy? A) increase federal spending B) reduce tax rates C) both A and B D) neither A nor B I think it is B...
July 22, 2012

Economics
Taxable income is A) total income less deductions and exemptions. B) earned income less property income. C) all income other than wages and salaries. D) wage and salary income only. E) all earned income is it a?
July 22, 2012

economics
thanks
July 22, 2012

economics
THe amount in the budget not covered by tax and other revenues
July 22, 2012

economics
It could be The accumulated value of outstanding payments owned to the government. Is illegal due to he balance budget legislation. Has always been there and is simply a fact in life. Is the amount in the budget not covered by tax and other revenues. All of the above.
July 22, 2012

economics
What is the budget deficit in a given year?
July 22, 2012

Economics
well the 3 choices are... The interest you earn can be spent at local businesses. Banks lend your saved money to businesses to help them expand. By learning to save, you are increasing your value as a worker.
July 20, 2012

Economics
How are you helping businesses expand when you put money in a savings account?
July 20, 2012

Economics
what are a few factors necessary for economic growth related to changes in aggregate supply and demand? I know The factors necessary for economic growth include more capital, more labor, and technological change, cause an increase in aggregate SUPPLY, but i don't know ...
July 20, 2012

Economics
I know The factors necessary for economic growth include more capital, more labor, and technological change, cause an increase in aggregate SUPPLY, but i don't know about aggregate "demand".
July 20, 2012

Economics
what are a few factors necessary for economic growth related to changes in aggregate demand?
July 20, 2012

US Government
Okay thanks
July 18, 2012

US Government
i dont, My teacher asked us this. But I know the accused are supposed to have full rights until they are proven guilty.
July 18, 2012

US Government
Why do we have more safeguards for accused criminals than the victims themselves?
July 18, 2012

physics
A horse pulls upon a wagon, but according to Newton’s third law the wagon pulls back with an equal and opposite force upon the horse. Use a free-body diagram and show all the involved forces. i posted this question before but i still dont get it. Could someone explain ...
July 17, 2012

Physics
A horse pulls upon a wagon, but according to Newton’s third law the wagon pulls back with an equal and opposite force upon the horse. How then can either the wagon or the horse move? I'm supposed to draw a free body diagram but I'm not sure on the forces.? I have...
July 17, 2012

Chemistry
I meant moles of MnO4^- which according to the balance reaction is 1
July 15, 2012

Chemistry
thank you so much! It makes more sense now!! I was clearly on the right path but scared I was making a mistake. For the g of SO4 is it mols Fe x mw of SO4^2-? not mols of SO4^2- x mw of SO4^2-?
July 15, 2012

Chemistry
So I did a titration experiment using 0.01 M potassium permanganate. In an erlenmeyer flask I placed a mass sample of FeSO4- with enough DI water to have a total volume of 20-25ml. I recorded the volume of MnO4- it took for the solution to change color (react). I performed a ...
July 15, 2012

Physics
A pulley system os being used to raise a load. The rope begins at the ceilings, goes down, round a pulley on the load, up to a pulley on the ceiling, back down and around a second pulley on the load, and up to a sheave (a motor driven pulley) on the ceiling. The rope is ...
July 15, 2012

Physics
Actually, the two people above are wrong. They did not take into account the 10m travelled behind and in front. The total distance is 25.54 m (10+2.7+10+2.7). The velocity relative to the other car is 9km/h (2.5 m/s). You must use 9 km/h and not 114 km/h because the other car ...
July 8, 2012

PHYICAL
Awoman of 75kg skis down a 50m high hill , the frictional force is not negligible her speed at the bottom of the hill is only 25m\sec, What is the work done by the frictional forces.
July 8, 2012

Mah
A business issued a $9000, 120-day note to a supplier which discounted the note at 9%. The proceeds are:
July 1, 2012

Math
Thanks, I did finally get the hang of it after I turned it in the first time with all of those wrong. I dont know how I messed up on it so poorly.
July 1, 2012

Math
. Jacksonville Technical College received $3,445,553 in state aid on September 15 for the fall academic semester. The vice-president for finance decided to invest $2,000,000 in a 2-month investment that pays 11.5% simple interest. How much interest will the college earn on the...
July 1, 2012

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