Wednesday
July 23, 2014

Posts by alex


Total # Posts: 2,543

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.

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

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]

english
The chess copetition ended ob time pronoun or noun

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...

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?

english
Noun

writing
First second next last in conclusion in summary then final first of all second of all

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 be...

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

Physics
I have the same problem. Please help!

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 .

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?

Science
make a statement relating hydrogen ion concentration to the acidity and basicity of solutions

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?

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 cont...

Biology
make a statement relating hydrogen ion concentration to the acidity and basicity of solutions

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?

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

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

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.

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

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 ne...

Math
Can you show me how

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?

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 i...

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?

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?

Pre-calc
Solve 3.3= 1.005^n

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?

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?

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?

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

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 t...

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"?

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 ...

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.

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...

algebra
x+1/3=5/6

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?

English
12. A 13. D 14. D

English
12. A 13. D 14. D

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 abo...

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.

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!

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?

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.

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.

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) ]

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.

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 accommod...

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

Physics
thanks!

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

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

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

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...

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?

Government vocab
Thank you!!

Government vocab
3.n 4.c 8.j 12.o 15.d

Government vocab
6 is correct

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

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 par...

GOVERNMENT
2.a...3part test 5.f... to allow schools to form religious groups.

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 case...

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...

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?

Economics
Then the only other option is A?

Economics
Then the only other option is A?

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...

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?

economics
thanks

economics
THe amount in the budget not covered by tax and other revenues

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.

economics
What is the budget deficit in a given year?

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.

Economics
How are you helping businesses expand when you put money in a savings account?

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 abou...

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".

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

US Government
Okay thanks

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.

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

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 wha...

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 ...

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

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-?

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 t...

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 vertic...

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 ...

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.

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

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.

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...

Physics
When two identical ions are separated by a distance of 5.9 multiplied by 10-10 m, the electrostatic force each exerts on the other is 6.0 multiplied by 10-9 N. How many electrons are missing from each ion?

Math Economics
1. 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 th...

US Government
Thanks

US Government
Non-voting is a huge problem in the US because... A)many Americans think voting does not make a difference. B)most voters think that all elections are of equal importance. C)many illegal aliens vote. D)most Americans do not believe in democracy I know its not D. I think it is A

US Government
Thank you!!

US Government
people who believe voting is important have high political ...? (8-letter word) ----c-c-.

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