Monday
April 21, 2014

Posts by Alex


Total # Posts: 2,500

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-.

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

Physics
A pot contains 243 g of water at 78°C. If this water is heated and all evaporates to form steam at 100°C, what is the change in the entropy of the H2O?

R.E
me teacher has asked us to make some questions on guru nanak and i am not sure what to put so i was wondering is someone can help me

Physics
Two identical charged particles of mass m=1.6 kg and electric charge Q=-5.2 μC are placed on an frictionless 26° incline. One of them falls down to the bottom and stops against the wall. The other stays at rest in the middle of the incline as shown in Figure. Find is ...

Physics
A wave on a string has a speed of 400 m/s. If the tension in the string is 131 N and its length is 3.5 m, what is the mass of the string?

Physics help
If a spherical glass marble has a radius of 0.00665 m at 1.02×105 Pa, at what pressure will it have a radius of 0.00650 m? Thanks

US government
Which of the following was ratified with the assistance of adding a Bill of Rights to assure citizens that their individual rights would not be imposed upon by the new government? A)The Magna Carta B)The Articles of Confederation C)The Declaration of Independence D)The US Cons...

Physics
Thank you!

Physics
The displacement of a harmonic oscillator is given by y = 8.4 sin(14t), where the units of y are meters and t is measured in seconds. What is its maximum velocity?

Physics
Thank you so much!

Physics
The blood flow rate through the aorta is typically 103 cm^3/s, and a typical adult has about 4.9 liters of blood. (a) How long does it take for all your blood to pass through the aorta? ___________s (b) If your aorta has a diameter of 2.1 cm, what is the speed of blood as it f...

Physics
A CD (radius 6.0 cm) is spinning freely with an angular velocity of 450 rpm when a bug drops onto the CD a distance 4.6 cm from the center. If the CD slows to 260 rpm, what is the ratio of the bug's mass to the mass of the CD? (Ignore the effect of the hole in the center o...

Physics
Nevermind figured it out, just have to use m1v1=m2v2.

Physics
Halley's comet moves about the Sun in a highly elliptical orbit. At its closest approach, it is a distance of 8.90 1010 m from the Sun and has a speed of 54 km/s. When it is farthest from the Sun, the two are separated by 5.30 1012 m. Find the comet's speed at that poi...

math
at a college book store Carla purchased a math text book and a novel that cost a total of $54, not including tax. If the price of the math math textbook, m is more than 3 times the price of the novel, n what is the price of each book I'm off and coming home?

math
at a college book store Carla purchased a math text book and a novel that cost a total of $54, not including tax. If the price of the math math textbook, m is more than 3 times the price of the novel, n what is the price of each book I'm off and coming home?

psychology
"I am getting better and better " is great, but lacks the strong effect that a dramatic statement ("I am excellent") has. To combat this, when the void is deep, I recommend using affirmations concerning your virtues and strengths. "I have a real knack ...

Pre-calc
Thanks Reiny!!

Pre-calc
Project U onto V. U=(4,2) V=(1,-2) ?? Is there a formula for this?

Physics
An open railroad car of mass 2445 kg is coasting with an initial speed of 22 m/s on a frictionless, horizontal track. It is raining, and water begins to accumulate in the car. After some time, it is found that the speed of the car is only 5 m/s. How much water (in kilograms) h...

Physics
A car engine is initially rotating at 180 rad/s. It is then turned off and takes 1.20 s to come to a complete stop. What is the angular acceleration of the engine? Assume acceleration is constant.

Physics
An electric motor is rated to have a maximum power output of 0.72 hp. If this motor is being used to lift a crate of mass 188 kg, how fast (i.e., at what speed) can it lift the crate? Hint: Assume the only other force on the crate is the force of gravity.

American History
I think maybe Progressives believed that direct election of senators gave more control of government to the people?

American History
One more question: Why did the Progressive movement want the direct election of senators? Senators elected indirectly made little effort to represent the people. Progressives believed that having representatives elected by state legislatures was sufficient. Progressives believ...

American History
What was one reform the Progressive movement achieved? direct election of U.S. senators reduction of government regulation religious involvement in government elimination of prohibition

physics!
while running a marathon, alex is producing about 900 calories per hour. 1 calorie is 4184 j. if the specific heat of the human body is 3500 j/kg x c, how many degrees celsius would alexs temperature increase if he did not sweat and ran the marathon in 3 h and 10 min? he has a...

Physics
A car of mass 1670 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's speed is 14 m/s, what is the frictional force between the road and the tires?

Physics
A car of mass 1670 kg is traveling without slipping on a flat, curved road with a radius of curvature of 34 m. If the car's speed is 14 m/s, what is the frictional force between the road and the tires?

Physics
Thank you so much!

Physics
A compact disc spins at 2.8 revolutions per second. An ant is walking on the CD and finds that it just begins to slide off the CD when it reaches a point 3.2 cm from the CD's center. What is the coefficient of friction between the ant and the CD?

Physics
Thank you!

Physics
There are two forces acting on an object. One force has a magnitude of 39 N and is directed along the +x axis. The other force has a magnitude of 25 N and is directed along the +y axis. What is the direction of the acceleration of the object? Express your answer by giving the ...

Physics
That makes a lot more sense now. Thanks!

Physics
A sled is pulled with a horizontal force of 17 N along a level trail, and the acceleration is found to be 0.40 m/s2. An extra mass m = 4.4 kg is placed on the sled. If the same force is just barely able to keep the sled moving, what is the coefficient of kinetic friction betwe...

Physics
A horizontal rifle is fired at a target 47 m away. The bullet falls vertically a distance of 8 cm on the way to the target. (a) What is the speed of the bullet just after it left the rifle? (b) What is the speed of the bullet just before it hits the target?

Physics
You work for a moving company and are given the job of pulling two large boxes of mass m1 = 115 kg and m2 = 286 kg using ropes as shown in the figure below. You pull very hard, and the boxes are accelerating with a = 0.21 m/s2. What is the tension in each rope? Assume there is...

Physics
A crate is placed on an inclined board as shown in the figure below. One end of the board is hinged so that the angle θ is adjustable. If the coefficient of static friction between the crate and the board is μS = 0.37, what is the value of θ at which the crate j...

Physics
You work for a moving company and are given the job of pulling two large boxes of mass m1 = 115 kg and m2 = 286 kg using ropes as shown in the figure below. You pull very hard, and the boxes are accelerating with a = 0.21 m/s2. What is the tension in each rope? Assume there is...

algebra 1
simplify and show work 3+4-10 dived by 2

Math
a right angle because 190 degree is a right triangle so find the coralation and simplify awnser determine value and round to the nearest tenth degree

Physics
Nevermind I figured it out.

Physics
A squirrel is resting in a tall tree when it slips from a branch that is 40 m above the ground. It is a very agile squirrel and manages to land safely on another branch after only 0.71 s. What is the height of the branch it lands on?

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