# Soly

Newest questions and responses by Soly-
## Public Speaking

I have to do an informative speech over a country that I've visited. I am stuck on getting some main points. So far, I have climate and attractions as my main points. I was also kind of thinking that I could talk about the kinds of food people eat in this

*asked on February 6, 2008* -
## Physics

What are the effects of radation on humans?

*asked on December 5, 2007* -
## Physics-Rutherford

Can you please give me a brief explanation of Rutherfords experiment?

*asked on December 4, 2007* -
## physics

What are vector components?

*asked on December 4, 2007* -
## Physics

What are the vector components? Would direction and speed be apart of it?

*asked on November 29, 2007* -
## Math essay

Can you please proofread my essay? My teacher is grading on accuracy, quality, correct spelling and grammar. The History of Mathematics As of today, there are plenty of new developments in the area of Mathematics. In at least some Mathematics courses, it

*asked on November 27, 2007* -
## Algebra-Parbola

I need help with the following questions. Graph the parabola with the given equation. (y-2)^2=6(x-1) (x+1)^2=6(y-1)

*asked on November 23, 2007* -
## Ellipse-Algebra

I need help with the following questions please. Graph the ellipse. ((x-1)^2)/(9)+ ((y-2)^2)/(4)=1 (4(x+1)^2)+9(y-2)^2=36

*asked on November 22, 2007* -
## Algebra

I am not too sure about this problem. Can you please help me? Graph the ellipse and locate the foci. 9x^2=144-16y^2 I got (- squareroot 7, 0) and (squareroot 7,0), but I was looking at one problem in one book similar to it, and it had the answer as (0, -

*asked on November 22, 2007* -
## Algebra-Partial Fractions

Can you please help me with the following questions please, I don't understand them. I know the general rule about them. Write the partial fraction decomposition of the rational expression. (x^2+4x-1)/(x^2+3)^2 (4x^3+4x^2)/(x^2+5)^2

*asked on November 19, 2007* -
## Partial Decompostion Fractions

Can you please help me with the following questions please, I don't understand them. I know the general rule about them. Write the partial fraction decomposition of the rational expression. (x^2+4x-1)/(x^2+3)^2 (4x^3+4x^2)/(x^2+5)^2

*asked on November 17, 2007* -
## Objective functon

An objective function and a system of linear inequalities representing constraints are given. Graph the system of inequalities representing the constraints. Find the value of the objective function at each corner of the graphed region. Use these values to

*asked on November 17, 2007* -
## Algebra

Please check my answers: Solve the problem. A steel company produces two types of machine dies, part A and part B. The company makes a $3.00 profit on each part A that it produces and a $5.00 profit on each part B that it produces. Let x= the number of

*asked on November 17, 2007* -
## Algebra

Can you please check my answer: Solve the problem. A person with no more than $4000 to invest plans to place the money in two investments, telecommunications and pharmaceuticals. The telecommunications investment is to be no more than 3 times the

*asked on November 17, 2007* -
## Physics

I need help with question one and I need question three to be checked please? 1.How does the mass of a nucleon compare with the mass of an electron? 3.Why do protons in a very large nucleus have a greater chance of flying apart by electrical repulsion? -I

*asked on November 11, 2007* -
## Math Essay

I have to write this paper over the history of math, can you please give me some other websites that I can use? So far I have one website from wikipedia. Also, can you please read my introduction? As of today, there are plenty of new developments in the

*asked on November 9, 2007* -
## Electromagnetic induction-check answers

Please check my answers: why does an iron core increase the magnetic iduction of a coil of wire? -I am thinking it has something to do with the voltage being increased. Will a cyclist coast farther if the lamp is connected to the generator on his bicycle

*asked on November 7, 2007* -
## physics-check my answer

in what position can a current-carrying loop of wire be located in a magnetic field so that it doesn't tend to rotate? -I think it would be perpendicular

*asked on November 6, 2007* -
## Magnets-Physics

I have a few questions that I am not too sure of. why is it inadvisable to make a horseshoe magnet from a flexible material? -is it because it would have enough magnetism Do the poles of a horseshoe magnet attact each other? If you bend the magnet so that

*asked on November 6, 2007* -
## physics

please check my answers and help me with the first one. how can you charge an object negatively with only the help of a positively charged object? -This one I am not too sure, when one material is rubbed against another electrons jump readily from one to

*asked on November 6, 2007* -
## Physics-Check my answers

when combing you hair you scuff electrons from your hair onto the comb.is your hair then positively or negativley charged?How about the comb? -Your hair is postively charged, while the comb is negatively charged Why are the tires for trucks carrying

*asked on November 6, 2007* -
## Physics-Check my answers

At the atomic level, what is meant by saying something is electrically charged? - When something is electrically charged it means that it has a positive charge. Why is charged usually transferred by electrons rather that protons? -The electrons are

*asked on November 6, 2007* -
## Physics Problems

Can you please help me with the following problem? Two charges separated by one meter exert 1-N forces on each other. If the charges are pushed to 1/4 meter separation, the force on each charge will be?

*asked on November 5, 2007* -
## Physics

Can you please help me with the following questions. Thanks! How does Rutherford's model of the atom acoount for the back-scattering of alpha particles directed at the gold leaf? What is Bohr's key idea (involving matter waves) that makes the Bohr atom

*asked on November 5, 2007* -
## Physics

I have this formula z=1/x (which is the formula for conductance) My x values are: 98.3 ohms, 967 ohms, and 545 ohms. What would my "z" values be? I know the units would be siemens.

*asked on November 3, 2007* -
## Physics

How does the idea of magnetic fields arising from circulating currents relate to permanent magnets?

*asked on October 28, 2007* -
## physics help

A 1000-kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is? when i work this out with the formula that you gave me, i get 2525 instead of 2000 N

*asked on October 17, 2007* -
## physics asap

A 1000-kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is? On this question I asked my teacher I am suppose to get 2000 N and I don't get how to get it.

*asked on October 17, 2007* -
## physics problem-check

do i have the following answer right? a tv set is pushed a distance of 2m with a force of 20 N that is in the same direction as the set moves. how much work is done on the set? would it be (2 m)(20 N)= 40 J

*asked on October 16, 2007* -
## physics word problem

A 1000-kg car moving at 10 m/s brakes to a stop in 5 s. The average braking force is? On this question I asked my teacher I am suppose to get 2000 N and I don't get how to get it.

*asked on October 16, 2007* -
## physics

Will check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s) /

*asked on October 15, 2007* -
## algebra

(21x^3 - 7)/(3x - 1)(this one I cant get the anwswer to match up with my answer choices.) Is there a way that I could use syntheic division?

*asked on October 15, 2007* -
## Algebra

7.(21x^3 - 7)/(3x - 1)(this one I cant get the anwswer to match up with my answer choices.) Is there a way that I could use syntheic division?

*asked on October 15, 2007* -
## Physics

I am having some problems trying to figure this out. Series circuits I have a "d" battery, a battery holder, 3 different resistors, and a multimeter. How do I put the resistors into a series cicuit? And when I use the multimeter, does it need to be set on

*asked on October 15, 2007* -
## Algebra Problems

Please check my answers. Find the coordinates of the vertex for the parabola defined by the given quadratic function. 1.f(x) = (x - 4)2 - 4 -I got (4,-4) Find the axis of symmetry of the parabola defined by the given quadratic function. 3.f(x) = (x + 2)2 +

*asked on October 15, 2007* -
## Algebra

Please check my answers. Find the coordinates of the vertex for the parabola defined by the given quadratic function. 1.f(x) = (x - 4)2 - 4 -I got (4,-4) Find the axis of symmetry of the parabola defined by the given quadratic function. 3.f(x) = (x + 2)2 +

*asked on October 15, 2007* -
## Algebra

Please check my answers. Find the coordinates of the vertex for the parabola defined by the given quadratic function. 1.f(x) = (x - 4)2 - 4 -I got (4,-4) Find the axis of symmetry of the parabola defined by the given quadratic function. 3.f(x) = (x + 2)2 +

*asked on October 14, 2007* -
## Physics

Will you check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s)

*asked on October 14, 2007* -
## Physics Questions

Can you please help me with some and check my answers? Thanxs! 3.Which is stronger, the electrical force between an electron and a proton or the gravitational force between these particles? -I got that the electrical force between an electron and a proton.

*asked on October 14, 2007* -
## Algebra

Can you please help me with the following problems? Find the coordinates of the vertex for the parabola defined by the given quadratic function. 1.f(x) = (x - 4)2 - 4 Find the axis of symmetry of the parabola defined by the given quadratic function. 3.f(x)

*asked on October 13, 2007* -
## Physics Problems

Will check my work and help me with the last two problems please? A 4 kg ball has a momentum of 12 kg m/s. What is the ball's speed? -(12 kg/m/s) / 4kg=3m/s A ball is moving at 4 m/s and has a momentum of 48 kg m/s. What is the ball's mass? -(48kg/m/s) /

*asked on October 13, 2007* -
## Variation

Please check my work, the answer I am suppose to get is 17.5, but instead I got 2.5. Solve the problem. 66. y varies jointly as a and b inversely as the square root of c, y=24 when a=6,b=4, and c=49. Find y when a=2, b=5, and c=16. -I got: y=kab/ sqrt of

*asked on October 12, 2007* -
## Algebra

Could you please check my answers? Find an nth degree polynomial function with real coefficients satisfying the given conditions. 1. n=3; 3 and i are zeros; f(2)=20 -I got: f(x)=-4^3+12x^2-4x+12 3.n=3;4 and i zeros;f(-3)=60 -I got:f(x)=6x^3+24x^2+6x+24

*asked on October 12, 2007* -
## Check my answers. Algebra

Can you please check my answers? Thanxs! Write an equation that expresses the relationship. Use k as the constant of variation. 20. f varies jointly as b and the square of c. -I got: f=kbc^2 22. r varies jointly as the square of s and the square of t. -I

*asked on October 10, 2007* -
## Variation

Could you please help me with the following question? Find the variation equation for the variation statement. 31. z varies jointly as y and the cube of x; z=96 when x=2 and y=6 (I don't understand this one. My answer choices are: a.y=2x^3y,b.y=2xy^3,

*asked on October 10, 2007* -
## Polynomial Function

Could you please check my answers? Find an nth degree polynomial function with real coefficients satisfying the given conditions. 1. n=3; 3 and i are zeros; f(2)=20 -I got: f(x)=-4^3+12x^2-4x+12 3.n=3;4 and i zeros;f(-3)=60 -I got:f(x)=6x^3+24x^2+6x+24

*asked on October 9, 2007* -
## Need help with variation

Could you please help me with the following question? Find the variation equation for the variation statement. 31. z varies jointly as y and the cube of x; z=96 when x=2 and y=6 (I don't understand this one. My answer choices are: a.y=2x^3y,b.y=2xy^3,

*asked on October 9, 2007* -
## Variation Problem

Could you please help me with the following question? Find the variation equation for the variation statement. 31. z varies jointly as y and the cube of x; z=96 when x=2 and y=6 (I don't understand this one. My answer choices are: a.y=2x^3y,b.y=2xy^3,

*asked on October 9, 2007* -
## variation

Can you please check my answers? Thanxs! Write an equation that expresses the relationship. Use k as the constant of variation. 20. f varies jointly as b and the square of c. -I got: f=kbc^2 22. r varies jointly as the square of s and the square of t. -I

*asked on October 9, 2007* -
## variation

Can you please check my answers? Thanxs! Write an equation that expresses the relationship. Use k as the constant of variation. 20. f varies jointly as b and the square of c. -I got: f=kbc^2 22. r varies jointly as the square of s and the square of t. -I

*asked on October 9, 2007* -
## Variation-Check Problems

*asked on October 8, 2007* -
## Variation-Questions

I have some questions that I don't understand and need to be checked please? Slove the problem. 1. y varies directly as z and y=187 when z=17. Find y when z=15 -This is how I did it: 187=k*17, I divided by 17 on both sides and got k=11, then I plugged it

*asked on October 8, 2007* -
## Variation

I have few questions that I need checked please and could you help me with the last question? Write an equation that expreses the relationship. Use k as the constant of varaiation. 1. s varies directly as h -I got: s=kh 2.a varies directly as the square of

*asked on October 8, 2007* -
## Physics

What does it mean to say that angular momentum is conserved? Give an example you might see on Earth. How could conservation of angular momentum help astronomers understand the development of the solar system? (this the part of the question that I don't

*asked on October 6, 2007* -
## Phyics

I have a few questions that I need help with please. Show by algebraic reasoning that your gravitational acceleration toward an object of mass M a distance d away is a = GM/d2 and therefore doesn’t depend on your mass. (I don't understand this question)

*asked on October 5, 2007* -
## Physics

what is the use of knowing the center mass of an object when making a calculation?

*asked on September 26, 2007* -
## Physics

I am doing this exercise for physics class where I have to place a penny on a ruler and balance it. And I don't understand what is the use of knowing the center mass of an object when making a calculation?

*asked on September 25, 2007* -
## Algebra

I need help solving the following. Perform the indicated operatioons and write them in standard form. (-4 - squareroot of -36)^2

*asked on September 17, 2007* -
## Physics Problem

Could you please check my work? 2. A 2 kg ball of putty moving to the right at 3m/s has a head-on inelastic collision with a 1 kg ball of putty moving to the left at 3m/s. What is the final magnitude and direction of the velocity of the stuck together

*asked on September 16, 2007* -
## Algebra- ASAP

Could you please help me and check my answers? Find the domain of the function. f(x)=-8x-2 -I got the domain being (negative infinity, postive infinity). g(x)= 3x/(x^2 -49) (I got (-inifinity,-7)U (-7,7) U (7, +ininfinity) The U is the union symbol. Find

*asked on September 16, 2007* -
## Physics

Could you please check my answers and help me with some? 1. What does it mean to say a physical quantity is conserved? Why is this idea useful? (I don't understand how it is useful) -When a physical quantity is conserved it means that it doesn’t change.

*asked on September 16, 2007* -
## Functions

Could you please help me and check my answers? Find the domain of the function. f(x)=-8x-2 -I got the domain being (negative infinity, postive infinity). g(x)= 3x/x^2 -49 (I got (-inifinity,-7)U (-7,7) U (7, +ininfinity) The U is the union symbol. Find the

*asked on September 15, 2007* -
## Function compostions

Sorry I had to repost, I left somethings out. Can you please check my answers? For the given functions f and g, find the indicated composition. 5. f(x)=7x+9, g(x)=2x-1 Find (f *g)(x) I got 14x+2 For the given functions f and g, find the indicated

*asked on September 15, 2007* -
## Domain of composite function

Can you please help me with the following questions? Find the domain of the composite function f * g. 12. f(x)=x+3, g(x)=1/(x+7) 15. f(x)=7x+70, g(x)=x+2

*asked on September 14, 2007* -
## Functon compostions

Can you please check my answers? For the given functions f and g, find the indicated composition. 5. f(x)=7x+9, g(x)=2x-1 I got 14x+2 For the given functions f and g, find the indicated composition. 8. f(x)=-5x+3, g(x)=6x+3 I got -30x+18 Find functions f

*asked on September 14, 2007* -
## Algebra

Find the domain of the function g(x)= 3x/x^2 -49 I try to figure it out it, and since x^2-7 is a perfect square (x+7)(x-7), I thought x couldn't be +-7?

*asked on September 13, 2007* -
## Algebra-One to one function

Could you please check my answers and help me with one of them? Find the inverse of the one to one function 1. f(x)-4x+7 -I got f^-1(x)=x-7/(-4) 2. f(x)= square root of x-8 -I got f^-1(x)=x^2-8 3. f(x)=4/(5x-1) This one I don't understand how to find the

*asked on September 13, 2007* -
## Algebra-Functions

Could you please check my answers and help me with two problems? Determine which two functions are invereses of each other. 1. f(x)=5x, g(x)x/5, h(x)5/x -I got that f(x) and g(x) are invereses of each other 2. f(x)=x-2/(2), g(x)=2x-2, h(x)=x+2/(2) -I got

*asked on September 13, 2007* -
## Algebra

Could you please check my answers and help me with one? Find the domain of the function. f(x)=-8x-2 -I got the domain being (negative infinity, postive infinity). g(x)= 3x/x^2 -49 (This one I don't understand how to find the domain)

*asked on September 13, 2007* -
## Physics Homework

1. You push a heavy car by hand. The car, in turn, pushes back with an opposite but equal force on you. Doesn’t this mean the forces cancel one another, making acceleration impossible? Why or why not? -No, because of the system that is involved. The

*asked on September 12, 2007* -
## Physics Homework

Could you please check my answers? Thanks! 1. You push a heavy car by hand. The car, in turn, pushes back with an opposite but equal force on you. Doesn’t this mean the forces cancel one another, making acceleration impossible? Why or why not? -No,

*asked on September 11, 2007* -
## Algebra

Could you please check some of my Algebra problems please? Write the standard form of the equation of the circle with the given center and radius. 1. (-7,4);8 I got (x+7)^2 + (y-4)^2=64 2. (-7,10); square root of 17 I got (x+7)^2 + (y-10)^2=17 3. (0,0); 2

*asked on September 10, 2007* -
## Physics

Please check my answers: Why does a brick weigh 1 kilogram. Explain. -Is it because the matter in the brick is the gravitational pull between the brick and the earth? When one water drop falls from a facet, and then a few minutes later another drop. How

*asked on September 9, 2007* -
## Physics Homework

I have another question about my homework. When a car stops, why should you have the engine running? -Is it because you need to have friction between the car and the road inorder to make it run?

*asked on September 9, 2007* -
## Physics

I got a few questions that I need to be checked please? Why does a brick weigh 1 kilogram. Explain. -Would it be cause there are not other forces acting on it that's why it weighs 1 kilogram? Why do lurch foward when a bus slows down? What law is this? -Is

*asked on September 9, 2007* -
## physics homework

I need help with the following questions: You are driving north on a highway. Then, without changing speed, you round a curve and drive East. What is it that changes when you make this turn? Would it be acceleration, direction, velocity, and distance

*asked on September 9, 2007* -
## Physics ASAP

I have question: Galileo experimented with balls rolling on inclined planes with angles ranging from 0 degrees to 90 degrees. What range of accelerations correspond to this range in angles?

*asked on September 9, 2007* -
## Algebra Functions

I don't understand how you determine whether a function is even, odd,or neither. Here are my problems: Determine whether the given function is even, odd, or neither. 8. f(x)=x^3-x^2 This is how I did it. f(-x)=(-x^3)- (-x^2)= (-x)(-x)(-x) - (-x)(-x) =

*asked on September 5, 2007* -
## Algebra problems

I have some problems that I would like checked please. Find and simplify the difference quotient f(x+h)-f(x)/h, h can not equal 0 for the given functions. 1. f(x)=x^2+3x+9- I got 2x+h+3 Evaluate the piecewise function at the given value of the independent

*asked on September 5, 2007* -
## Physics Problems

I have a few questions that I don't understand and are having troulbe with, could you please help me out? Thanxs! What is the acceleration of a car that maintains a constant velocity of 100 km/hr for 10 seconds? (For this one don't I have to get the same

*asked on September 4, 2007* -
## Phyics Word Problems

Could you please check my work and help me with two of the problems. An airplane that flies at 100 km/h with a 10 km/h tailwind travels at 110 km/h relative to the ground. If it instead flies into a 10 km/h headwind, its groundspeed is 100km/h-10km/h = 90

*asked on September 3, 2007* -
## Physics

I have a forumla question. I have this formula x=1/2t^2. Is this the formula to find the acceleration that is caused by gravity?

*asked on September 3, 2007* -
## Physics

I am not too sure how to solve this problem: Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 10 kg object on the moon? This is how I did 1/6(10)(9.8)=16.3 N

*asked on September 2, 2007* -
## Algebra

I don't understand how to do the folliwing problems. Find and simplify the difference quotient f(x+h) -f(x)/h, h cannot equal 0 for the given formula. 1. f(x)=5x^2 options: a. 5, b.5(2x+h), c. 10/h +x+5h, d. 5(2x^2+2xh+h^2)/h 2. f(x)=x^2+3x+9 options: a.

*asked on September 1, 2007* -
## Algebra-Functions

I have two problems, that both have graphs involved. 1. How do use a graph to find a particular function value like y=f(x).Find 2? 2. Also, how do you use a graph to determine the function's domain and range?

*asked on September 1, 2007* -
## Algebra

I don't understand how to do the folliwing problems. Find and simplify the difference quotient f(x+h) -f(x)/h, h cannot equal 0 for the given formula. 1. f(x)=5x^2 options: a. 5, b.5(2x+h), c. 10/h +x+5h, d. 5(2x^2+2xh+h^2)/h 2. f(x)=x^2+3x+9 options: a.

*asked on September 1, 2007* -
## Function Graphs

How do use a graph to find a particular function value like y=f(x).Find 2? Also, how do you use a graph to determine the function's domain and range?

*asked on September 1, 2007* -
## Functions

I need help with the following question. I am sure how to tell if something is a function or not. Determine whether the realtion is a function. {(-6,2),(-2,5), (3,2),(3,-7)} I think its not a function, but then again I think it is cause you have different

*asked on September 1, 2007* -
## Algebra

Evalute the function at the given value of the independent variable and simplify. f(x)=2x^2-5x+6; f(x-1)- I got 2x^2-9x+13 I still keep on getting the same answer.

*asked on August 30, 2007* -
## Algebra

Could you please check my work. Determine whether the realtion is a funtion. 2.{(-6,2),(-2,5),(3,2),(3,-7)} -Not a function 2. Determine whether the equation defines y as a function of x. 2x+4y=15- the answer I got is y is a fucntion of x. Evalute the

*asked on August 30, 2007* -
## Phyics

Could you please check my work, I am not too sure what do. An airplane that flies at 100 km/h with a 10 km/h tailwind travels at 110 km/h relative to the ground. If it instead flies into a 10 km/h headwind, its groundspeed is : 110 km/h /2= 55 km/h

*asked on August 30, 2007* -
## Physics Probelms ASAP

Could you please check my work and help me with a couple. An airplane that flies at 100 km/h with a 10 km/h tailwind travels at 110 km/h relative to the ground. If it instead flies into a 10 km/h headwind, its groundspeed is : 110 km/h /2= 55 km/h The

*asked on August 29, 2007* -
## Math

I have another question. If I have 3.14 cm^2/(2.00cm/2)^2 would it be 3.14 cm?

*asked on August 27, 2007* -
## Math

When you divide a number that is cm^2 by another number that just cm, would the final answer have cm? Like if I have 2cm^2 / 1 cm=2cm

*asked on August 27, 2007* -
## Physics

From my homework, I have to to find the area of circle. One of my tasks is to trace a cylinder end down and then on graph paper trace the end of each. I did already that, but now I am having troulb converting the number of squares to square centimeters.

*asked on August 26, 2007* -
## Algebra

I need help with the following problem: Solve the equation: (x/2x+2)= (-2x/4x+4) + (2x-3/x+1)

*asked on August 22, 2007* -
## Algebra

I have some problems that I am having trouble with and I have some that need checking please. Thanks! Solve the equation. 4. (x+7/4)=2(x-1/6) Find all the value(s) of x that make thedenominator(s) zero. Then solve the equation. 6. (x-8/2x) +5= (x+6/x)

*asked on August 21, 2007* -
## Physics

I have a question that I don't understand, could you please help me? Thanks! Heres my question: A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is Isn't the

*asked on August 19, 2007* -
## Algebra

I have a few more questions that I either need help with or just need checking. Is the algebraic expression a polynomial? if it is write the polynomial in standard form, 1. 6x-9+8x^2 I got Yes; 8x^2+6x-9 Perform the indicated operations. Write the

*asked on August 13, 2007* -
## Algebra

Could you please help me with some math problems? Thanks! Add or subtract terms wherever possible. 1. 2 cube root of 135 + cube root of 455 2.y cube root of 24 - cube root of 192xy^3 none of your numbers in the cube roots in either question can be "broken

*asked on August 13, 2007*

## Pages

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