# Posts by Lily

Total # Posts: 1,543

**Physics**

An infinitely long line of charge has linear charge density ë. Find the energy density of the electric field at a point a radial distance r from the wire. (Use the following as necessary: å0, ë, r.)

**physics**

The dome of a Van de Graaff generator has a diameter of 32.0 cm and is surrounded by dry air with a 'breakdown' electric field of 3.00 106 V/m. What is the maximum potential of the dome?

**physics**

A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of −8.50 ìC. Find the electric potential at O, the centre of the semicircle.

**physics**

A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of −8.50 ìC. Find the electric potential at O, the centre of the semicircle.

**geometry**

If a pinic area is located at the midpoint between sacramento and oakland. Find the distance to the pinic area from the road sign. Roseville:5 Sacramento:23 Oakland:110

**chem**

1. Suppose that a recipe calls for an oven temperature of 189°F. Convert this temperature to degrees Celsius and to kelvins. --I found that Celsius is 87.2, plug it in K=C+273, got 360.2 but it was wrong. (e) Neon, the gaseous element used to make electronic signs, has a ...

**FINANCE**

you want to retire in 30 years. You intend to invest $200 per month into a mutual fund that you expect to return 12% per year (1% monthly). If you continue making these monthly investments for 30 years, what amount of money will you have at the end of the 30th

**More math linear equation help?**

I'm looking at this graph where I see a line AB with the points (-2,2) and (2,8). Then I have to do the following: a) Find the length of AB b) Find the midpoint of AB c) Write an equation for the line going through AB I don't understand how to do part a and c, so could...

**Math Linear function help?**

How do you write an equation of a line in slope intercept form if two points are given? Ex. Say you were given the points (0,6) and (4,3)? What would you do?

**Calculus**

A rancher wants to build a rectangular pen with an area of 150 m2. Let W be the width of the pen and L be the length of the pen. a. Find an equation for the perimeter P in terms of W and L . b. Use the given area to write an equation that relates W and L . c. Find the pen ...

**Algebra 2**

Thank you

**Algebra 2**

State the possible number of imaginary zeros of f(x)= 2x^3 - 4x^2 + 8x - 3. 0,1,3?

**Algebra 2**

It feels like too many problems have no solutions! Very frustrating for me. Thank you for checking it!

**Algebra 2**

Solve the system: y^2 - 4x^2 = 4 and y = 2x. (-1,-2)?

**Algebra 2**

Thank you!

**Algebra 2**

Find the exact solutions of x^2 - (y - 12)^2 = 144 and y = -x^2. No solution?

**Algebra 2**

Sorry, I'm very rusty on this concept. Thank you for the explanation.

**Algebra 2**

Write the expression 13m^8 - 3m^4 + 4 in quadratic form if possible. m^8?

**Algebra 2**

Thank you

**Algebra 2**

Solve the system, 4x^2 + y^2 = 20 and y = 4x. (square root of 10/2, 2 square root of 10)?

**Algebra 2**

At this point, I'm fooling myself!:-)

**Algebra 2**

Thanks

**Algebra 2**

Find the exact solutions of x^2 - (y - 6)^2 = 36 and y = -x^2. (0,0), (6,6), and (-6,6)?

**Algebra 2**

Thank you, again!

**Algebra 2**

The graph (x - 2)^2 + 3(y - 2)^2 = 25 is the graph of a(n) ________. Ellipse?

**Algebra 2**

Thank you

**Algebra 2**

The graph of x^2 + y^2 = 6x + 81 is the graph of a(n) _______. Circle?

**Algebra 2**

Thank you

**Algebra 2**

The graph of x^2 - 12y = 12x - 12 is the graph of a(n) ________. Parabola?

**biology**

For each of these restriction enzymes, determine whether or not the enzyme would cut the normal, Mutant A, Mutant B, or Mutant C DNA sequences described in part (g) and select your answers in the table below:

**Algebra 2**

Thank you!

**Algebra 2**

The graph of 11x - x^2 - 4y^2 = 2y - 16 is the graph of a(n) ________. a. circle b. ellipse c. hyperbola d. parabola C?

**Algebra 2**

Thanks!

**Algebra 2**

The graph of 5x - 9y^2 = 12 - 4y is the graph of a(n)______. a. circle b. ellipse c. hyperbola d. parabola C?

**Probability Math**

A committee of four students will be selected from a list that contains six Grade 9 students and eight Grade 10 students. What is the expected number of Grade 10 students on the committee?

**Math**

At the Statsville County Fair, the probability of winning a prize in the basketball toss game is 0.1. a) Show the probability distribution for the number of prizes won in 8 games (round to 6 decimal places). b) If the game will be played 500 times during the fair, how many ...

**Algebra 2**

Thank you!

**Algebra 2**

Find the expansion of (r + 4)^3. r^3 + (3r^2)(4) + 3r16 + 64?

**Physics**

To measure how far below the ocean surface a bird dives to catch a fish, a scientist uses a method originated by Lord Kelvin. He dusts the interiors of plastic tubes with powdered sugar and then seals one end of each tube. He captures the bird at nighttime in its nest and ...

**chem 1**

w=-P(delta)V w=(-143.0kPa)(1.35m^3) w=193.05kJ 193.05*1000=193050J

**social studies**

what is one power given to the state governments in the Constitution

**Math**

So it's rhombus

**Math**

Select the geometric figure that possesses all of the characteristics: (1) four equal sides (2) both pairs of opposite sides are parallel (3) it doesn't contain any right angle A) square B) parallelogram C) rhombus D) isosceles triangle I know it's not A or D

**Chemistry**

If there are 2L of H2 gas at .625 atm, and 1L of N2 gas at .200 atm isolated in two flasks, what are the final partial pressures of each, and the total pressure, after the valve between the two flasks has been opened and the gases are allowed to mix? Is this simply a ratio ...

**Busines Ethics**

Imagine you are a salesperson.When does offering a gift,Such as basketball tickets,become a bribe rather than just a sales practis ?

**math**

If line 1 passes through (2, -6) and (-2, -2) and line 2 passes through (-3, 2) and (2, 12), where will line 1 and line 2 intersect? a)(-4,0) b)(-2,-3) c)(-6,2) d) (-2,-2)

**math**

in the problem its doesn't give me an ^ its a table for an equation in this case y1=6+2x and i need to find the "y1"

**math**

y1=6+2x x1 y1 -3 ? -2 ? -1 ?

**Number Theory**

Yan was opening a new restaurant, so she went to the sign store to get letters to make a sign to hang above the storefront. When she got to the sign store, the only letters they had in stock were two copies of the letter 'X,' two copies of the letter 'E,' and ...

**math**

y1=6+2x x1 y1 -3 ? -2 ? -1 ?

**math**

y1=6+2x x1 y1 -3 ? -2 ? -1 ?

**math**

what is the slope of the graph? what does it mean in the context of the problem? the slope for the problem is 2 i don't understand the second question then it says what is the y-intercept and what does the y-intersept represent. for the problem the y-intercept is 3, the ...

**math**

what is the slope of the graph? what does it mean in the context of the problem? the slope for the problem is 2 i don't understand the second question then it says what is the y-intercept and what does the y-intersept represent. for the problem the y-intercept is 3, the ...

**Biochemistry**

B! i need B, my brain sucks and won't answer B

**Chemistry**

9.33g

**Algebra 2**

Solve 12^x = 14^3x. I know I need to make the bases the same, but I don't know how.

**Algebra 2**

Thank you!

**Algebra 2**

Find a value(s) that makes the expression y^2 - 16 ---------- undefined. y^2 + 16 y=4i?

**physics**

a 2.1 weight receives 210 j of kinetic energy by a launcher, which is pointed straight up.

**physics**

a 2.1 weight receives 210 j of kinetic energy by a launcher, which is pointed straight up.

**math**

6,000 pounds and figure it out ur self

**math**

Identify a variable that could be described with an approximately normal distribution, and explain how you came to this conclusion.

**Chemistry**

A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?

**Chemistry**

A 1.44-g sample of an unknown pure gas occupies a volume of 0.336 L at a pressure of 1.00 atm and a temperature of 100.0 degrees Celsius. What is the unknown gas?

**science**

what combination of mediums will produce a stright line of light? how do you correct for hyperopia? how do you correct for myopia? what kind of people have an astigmatism? what part of the eye act as a lens and what part acts as a screen? how do different types of lenes bend ...

**Math:o**

Thank you.

**Math:o**

It takes a florist 3h 15min to make 3 small centerpieces and 3 large cebterpieces. It takes 6h 20min to make 4 small centerpieces abd 7 large centerpieces. How long does it take to make each small centerpiece and each large centerpiece? Write and solve a system of equations to...

**Algebra**

Thank you so much!:)

**Physics**

9.5

**World Geography**

The first one is c.

**computer**

Assume you have a computer that contains 2GB of memory. It contains four memory slots. Each slot can contain 128 MB, 256 MB, 512MB, 1 GB, or 2GB memory modules. Currently, each slot contains a 512MB memory module. What combinations of memory modules will satisfy your memory ...

**algebra 1**

The value, V, of a certain car after n years is given by the formula below. V = 32,000(0.75)n Based on the formula, what is the value of this car after 3 years? is it 72000

**algebra 1**

so is the answer 4 because 21*4 = 84

**algebra 1**

The formula for the volume, V, of a prism is V = Bh, where B equals the base area, and h is the height of the prism. What is the height of a prism with base area 21 cm2 and volume 84 cm3?

**algebra 1**

Josh hit a baseball straight up into the air. The equation below describes the height of the ball (h), in meters, as a function of time (t) in seconds. h(t) = -9.8t² + 30t + 1.5 What is the height of the ball after 3 seconds? i keep getting -195.9

**algebra 1**

not it is 71.6 right

**algebra 1**

is it 145.1

**algebra 1**

The formula for the height of a falling object is shown below, where h is the height of the object in meters, t is the time in seconds, and k is the height, in meters, from which the object began its fall. h = –4.9t² + k If a rock is dropped from a building that is ...

**Physics Grade 11**

The normal force is always perpendicular to the surface. So if the box is on a horizontal surface the Normal force it will be equal to the weith of it (mass *gravity) N= m*g N=117.6N the friction force always oposses to the movement and it will be equal to the horizontal ...

**Math**

Simplify the expression. 9p - 2q - 3 + 10q - 4r + 12

**ENG**

I'm trying to write a paragraph with levels of generality for English. Here's what I have so far... I need help with grammar and punctuation... also does it make sense ? In the city of Carson, California there is a small house on Mesa Boulevard that is shared among ...

**6th grade math**

I thought this wed site will help me, but this is a wed site to go to different teachers in different schools! I AM LOOKING FOR SOMETHING TO HELP ME NOT WAST TIME! This web site should at least say something to let us know what this web site is a about.

**Math question**

How many gallons of organge juice are in a full size family jug? I think 1 gallon?

**accounting**

What is the value of the following future amount? a)RM800 to be received 10 years from now discounted back to present at 10%.

**accounting**

What is the present value of RM6, 500 to be received 10 years from today if our discount rate is 10%?

**accounting**

Adam place RM2, 000 in a saving account paying 5% interest compounded annually, how much will Adam account accrue to in a)10 years b)15 years

**math**

What is the value of the following future amount? a)RM800 to be received 10 years from now discounted back to present at 10%. b)RM1, 000 to be received 8 years from now discounted back to present at 3%.

**math**

What is the present value of RM6, 500 to be received 10 years from today if our discount rate is 10%?

**math**

Adam place RM2, 000 in a saving account paying 5% interest compounded annually, how much will Adam account accrue to in 10years and 15years

**Algebra 2**

Thank you!

**Algebra 2**

Simplify (2y)(4xy^3). 8xy^4?

**Algebra 2**

Simplify the polynomial [(6x-8)-2x]-[(12x-7)-(4x-5)]. I came up with two answers: 36x^2 - 72x + 35 or -12x^2 + 8x - 2 Are either one of these the correct answer?

**Algebra 2**

Factor completely 4ab + 2a + 6b + 3 (2a + 3) (2b + 1)?

**fractions in simplest form**

i have no clue what it is

**Pre-AP physical science**

What is the best way to set-up my science fair project that is 40% of my 2nd semester grade and credits ?? A little lost

**Algebra 2**

Thank you!

**Algebra 2**

Solve by completing the square 3x(sqaured) - 8x - 6 = 0. Is it 4 - the square root of 34 / 3 and 4 + the square root of 34 / 3?

**Math**

the shadow if a metre stick is 1.3m long when a students shadow is 2.0m long. How tall is the student?

**maths --plse help me..**

You would try to find X first

**Science Hurry!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

A.