Wednesday

February 22, 2017
Total # Posts: 1,327

**Physics**

A round body of mass M, radius R, and moment of inertia I= BMR^2 is rolling without slipping. Its kinetic energy can be decomposed into the energy of its center of mass motion (translation) and the enrgy of rotation about its center of mass. The fractions of the body's ...

*May 10, 2011*

**Algebra**

i don't know how to slove the/A system by using substitution 3x+4Y=9 y=x-3

*May 10, 2011*

**Geometry**

You have a small graduated cylinder with maximum capacity of 250ml. All measuring marks have been worn off except the 50ml, the 150ml, and the 250ml marks. You have a second larger container(size not specified)that is unmarked. It is possible to put 125ml into the large ...

*May 9, 2011*

**Physic**

Just an instant before reaching the very bottom of a semicircular section of a roller coaster ride, the automatic emergency brake inadvertently goes on. Assume the car has a total mass of 850 kg, the radius of that section of the track is 53.0 m, and the car entered the bottom...

*May 8, 2011*

**Algebra**

Peter painted 1/3 of a room while Joe painted 2/5 of the same room. It then took Peter 1 hour, 40 minutes to finish painting the remainder of the room by himself. In how many hours could Peter have painted the entire room by himself? Express answer as a mixed number.

*May 6, 2011*

**math**

Write 7 3/5 as an improper fraction

*May 5, 2011*

**science**

Evolution is the theory and natural selection is the process. Explain what this might mean. How can environmental factors determine a feature in a species?

*May 3, 2011*

**science (Genetics and Evolution)**

What contains DNA? Where is DNA found? What is the difference between phenotype and genotype?

*May 3, 2011*

**Calculus**

To answer the question you would be looking at the point in the interval 0 < x < 10 which the area's totaled up is greatest. The point at which the area is greatest is the interval in which the area is 20, if you span it all the way towards x=10, you'd have (20-6...

*May 2, 2011*

**Computers**

How does a search engine work? List the four main parts of an e-mail header.

*May 2, 2011*

**Algebra**

1. 12 + 8a + 4a^2 2. Factorise -5x^2 + 27x - 10 Please show me full working out. Thank you!

*May 1, 2011*

**Math**

What is the number of units in the distance from the origin to the point (-8,6) in a coordinate system?

*May 1, 2011*

**10th Grade Algebra**

Please help me with these factorise algebra questions!!! 1. 9c squared + 30c + 25 - 4d squared 2. 12 + 89 - 4a squared 3. -5x squared + 27x - 10 4. If A= 15x squared - 20x +11 and B= 1 + 9x+ 5x squared, then A-B when factorised is...

*May 1, 2011*

**social studies**

want to find some essays or articlrs pertaining to the problems that developed due to the weakness of the Article of the Confederation

*April 25, 2011*

**algebra 2**

720000 sq meters

*April 12, 2011*

**physics**

how much work is done by an engine using 105 watts of power in 3.2 seconds?

*April 12, 2011*

**physics**

what is the wavelength of radar waves with the frequency of 6.0*10^10Hz? a. 0.0010m b.0.010m c.0.050m d.0.0050m

*April 12, 2011*

**physics**

i think its a

*April 12, 2011*

**physics**

why does the earth have a magnetic declination? a. the earth's axis of rotation is not constant b. the magnetic field of the earth is unknown c. its magnetic poles shift over time and are not aligned to its geographical poles. d. the north and south poles are improperly ...

*April 12, 2011*

**physics**

i think its d

*April 12, 2011*

**physics**

electricity is measured in kilowatts-hours, kW*h. this quantity can be converted to which other unit that measures energy? a.Pascals b.Joules c.Newtons d. Watts

*April 12, 2011*

**english**

what is the topic sentence in each paragraph? 1. Alice Doe’s article discussed overlooked tax deductions. It talked about some of the most commonly missed deductions. Whereas her use of statistics seemed to bolster her arguments, it would have been nice to see her ...

*April 10, 2011*

**physics**

Suppose 0.0290 kg of steam (at 100.00°C) is added to 0.290 kg of water (initially at 19.7°C.). The water is inside an aluminum cup of mass 44.7 g. The cup is inside a perfectly insulated calorimetry container that prevents heat flow with the outside environment. Find ...

*April 9, 2011*

**Chemistry**

Describe how you would make 1.50 Liters of 0.555 M magnesium chloride solution from a 3.77 M magnesium chloride solution already prepared?

*April 4, 2011*

**eng. macbeth**

this is a question on macbeth act II, i truly NEED anyone's help with this since it's due tom. Q.what would you say is the mood of Act II? What images and actions help to create this mood?why might images of blood and water appear in scene 2, and what do they symbolize?

*March 31, 2011*

**Physics**

When spiking a volleyball, a player changes the velocity of the ball from 4.5 m/s to -20 m/s along a certain direction. If the impulse delivered to the ball by the player is -9.7 kg * m/s, what is the mass of the volleyball?

*March 29, 2011*

**physics**

In a typical golf swing, the club is in contact with the ball for about 0.0010s. If the 45-g ball acquires a speed of 41 m/s, estimate the magnitude of the force exerted by the club on the ball.

*March 29, 2011*

**Physics**

A 0.125-kg baseball is dropped from rest. If the magnitude of the baseball's momentum is 0.750 kg * m/s just before it lands on the ground, from what height was it dropped?

*March 29, 2011*

**algebra 2**

Use the function to answer the question. h(x) = 4|x| 3 What is the value of h(6)? (Points : 4) 27 21 21 27

*March 23, 2011*

**chemistry**

Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide: NH4I(s) ↔ NH3(g) + HI(g) At 400ºC, Kp = 0.215. If 150 g of ammonium iodide is placed into a 3.00-L vessel and heated to 400ºC, calculate the partial pressure of ammonia when equilibrium is ...

*March 22, 2011*

**Statistics**

I am doing a stats study and im stuck on what test to perform. Please look at my subject and advise me.. I am testing to see whether a person that is best in math and science will be able remember more numbers than letters and if a person that is better in language and history...

*March 21, 2011*

**Titties**

I don't know but if its not related to tits it doesnt matter

*March 20, 2011*

**algebra**

Three points of a 5x5 square array are connected. How many square units are in the area of the largest possible triangle that can be formed?

*March 20, 2011*

**busineslae**

In the video game Corporate Cowboy, your task is to investigate complaints of wrongdoing on the part of corporate directors and officers, decide whether there is a violation of the law, and deal with the wrongdoers accordingly. Jane, a shareholder of Goodly Corporation, ...

*March 11, 2011*

**BUSINESS LAW**

Which side of this debate do you support? Is it possible to strike an appropriate balance between the rights of both groups on this issue? At issue in the twenty-first century is the trade-off between the necessity of writers, musicians, artists, and movie studios to profit ...

*March 8, 2011*

**physics**

traveling at 27.78 m/s with a deceleration rate of 5m/s squared.....How long will it take you to decelerate to 0.

*March 7, 2011*

**physics**

traveling at 27.78 m/s with a deceleration rate of 5m/s squared.....How long will it take you to decelerate to 0.

*March 7, 2011*

**Physics**

ΣFy=0 Normal Force = mass*gravity N=m*g ΣFx=ma Force of Friction = mass*velocity^2/radius F=m*v^2/r Force of Friction = Coefficient of static friction*Normal force F=Us*N So... Us*m*g=m*v^2/r Us=v^2/(r*g)

*March 6, 2011*

**math**

Mathmate- Thank you very much, I completely understand your explanation now.

*March 6, 2011*

**math**

How many two digit numbers are there in base 5. I really don't understand how to figure this out. I know it's been asked already, but I still don't understand it.

*March 6, 2011*

**Algebra**

In base 5, how many two digit numbers are there?

*March 5, 2011*

**physics**

A computer is reading data from a rotating CD-ROM. At a point that is 0.032 m from the center of the disc, the centripetal acceleration is 111 m/s2. What is the centripetal acceleration at a point that is 0.070 m from the center of the disc?

*March 4, 2011*

**Math**

Emmy is 12. She writes an equation to find her mother's age, m. m - 12 + 35 What operation solves the equation for m? add 12 to both sides, or subtract 12 from both sides, or multiply both sides by 12, or divide both sides by 12

*March 3, 2011*

**calculus**

determine the domain for each function f(x)=6x^(2)-x-1, g(x)=x-1

*February 27, 2011*

**calculus**

determine the domain for each function f(x)=x-6, g(x)=3x^(2)

*February 27, 2011*

**calculus**

determine the domain for each function f(x)=2x+3,g(x)=x-1

*February 27, 2011*

**math**

randy pedals his bicycle at a constant rate of 15 feet per second. which linear equation represent his total distance traveled y after x seconds?

*February 24, 2011*

**Chemistry**

In aqueous solution, hypobromite ion, BrO-, reacts to produce bromate ion, BrO3 -, and bromide ion, Br-, according to the following chemical equation. 3BrO-(ag) → BrO3 -(ag)+2Br-(ag) A plot of 1/[BrO-] vs. time is linear and the slope is equal to 0.056 M-1s-1. If the ...

*February 19, 2011*

**chemistry**

What is the rate law for N2O4+CO yields NO+CO2+NO2?

*February 16, 2011*

**Chemistry**

Ozone, O3, absorbs ultraviolet radiation and dissociates into O2 molecules and O atoms: O3 + hv --> O2 + O A 1.10 L sample of air at 22 degrees Celsius and 748mm Hg contains 0.25ppm of O3. How much energy, in joules, must be absorbed if all the O3 molecules in the sample of...

*February 14, 2011*

**earth science**

describe a possible pathway of carbon through the four spheres of the earth.Identifty what each the fourspheres of the earth contains

*February 13, 2011*

**Math**

Solve by factoring: (2x+9)(x-6)=0

*February 8, 2011*

**Math**

Multiply/divide and simplify: (12x^5-8x^3+4x)/(4x) The answer I got is 3x^4-2x^2+1. Is this correct?

*February 8, 2011*

**Math**

Simplify the expression: (3x^2-8x^3+4x)-(9x^2-x^3+x)+4(6x-7)

*February 8, 2011*

**physics**

would a larger rock dropped into a large pan of water make a larger wave than a smaller rock, and which would travel faster?

*February 2, 2011*

**Chemistry**

If 682000 kJ could be transferred with 100% efficiency to water, what volume of water, in liters, could be heated from 8.6 degrees Celsius to 60.0 degrees Celsius as a result?

*January 31, 2011*

**Statistics -Please help :/**

I need this as well......

*January 28, 2011*

**Statistics -Please help :/**

I'm having a problem with the entire Chi-square thing.. I do have answers to these but I'm not sure how to work them out.. If you could help that would be great! :) 1st part: A,B,C are schools. Is the choice of math programs followed independently by school? Write the ...

*January 28, 2011*

**5th grade math**

my sister say 76764546

*January 27, 2011*

**Chemistry**

What will be the final temperature of the water in an insulated container as the result of passing 6.00g of steam at 100.0 degrees Celsius into 100.0g of water at 24.0 degrees Celsius?

*January 27, 2011*

**...**

I happen to see this looking up my question and no. this was not me.. I'm wondering if "bj" took mine and modified it to make their own.. By the way, thank you for your help! I didn't get to reply because I was asleep..

*January 26, 2011*

**Chemistry**

After removing a crucible (containing CaCO3 obtained as a precipitate) from an oven, what could you do (if you were being extremely careful and had enough time) to prove that the CaCO3 is dry?

*January 26, 2011*

**math**

What is the answer to -12+r=-11

*January 26, 2011*

**Espanol III**

I am writing a composition for class and need someone to peer edit. No one around knows spanish so I am hoping someone here would be willing to look over it :) Thank you! Por primera, tú necesitas cambiar los hábitos. Si tú trabajas mucho para tener una ...

*January 26, 2011*

**Algebra 1**

x+x+1/3(x)=315

*January 26, 2011*

**Algebra 1**

answered.

*January 26, 2011*

**Physics**

A skier is gliding along at 2.62 m/s on horizontal, frictionless snow. He suddenly starts down a 16.9° incline. His speed at the bottom is 18.4 m/s. What is the length of the incline?

*January 25, 2011*

**Biology**

In each set up the dialysis tubing contains a solution of 30% glucose and safranin. However, the set ups differ in the contents of the beaker. The control set up has the same solution in the beaker while in the experimental set up it contains just water. In both the level of ...

*January 24, 2011*

**Math**

how do you convert 0.625 into a fraction

*January 24, 2011*

**Chemistry**

How do you make Tris into the acid form?

*January 24, 2011*

**Chemistry**

D is clearly the correct answer. In a sense, activation energy is related to temperature and at higher temps, molecules move faster and therefore have more frequent collisions. Catalysts lower the activation energy by bringing substrates together.

*January 24, 2011*

**math**

What multiplication fact can you double to find 4*7

*January 19, 2011*

**math**

Fhdnh

*January 19, 2011*

**algebra 2**

Farmer Brown wants to double the size of his rectangular backyard vegetable patch by adding a strip (of the same width) all the way around it. If its current patch is 12 feet by 18 feet, how wide does the strip need to be? how do you solve it step by step ?

*January 18, 2011*

**Mathematics**

no 11 1/8 she needs to reduce

*January 12, 2011*

**Trigonometry**

46

*January 12, 2011*

**math**

48 duh

*January 12, 2011*

**math**

If you put four 9-inch square boards together to make a bigger square, what would be the area of the new larger board in square feet?

*January 12, 2011*

**math**

If you put four 9-inch square boards together to make a bigger square, what would be the area of the new larger board in square feet?

*January 12, 2011*

**math**

If you put four 9-inch square boards together to make a bigger square, what would be the area of the new larger board in square feet?

*January 12, 2011*

**math**

all wrong

*January 12, 2011*

**math**

how do i write twenty-three hundredths as a number

*January 11, 2011*

**math**

Your answer will be zero. When you have a negative number like that in the beginning, you can make the problem much simpler by changing it. To change the problem, circle each number with the sign directly in front of it. So in this problem, circle the "-2" and the &...

*January 5, 2011*

**History**

What is predestination and how did it affect New England settlements? How did religion play a crucial role in the lives of New England women?

*January 4, 2011*

**Chemistry**

i think its 2. am i right ?

*January 3, 2011*

**Chemistry**

what is the total number of moles in 80.0 grams of C2H5Cl (gram-formula mass=64.5grams/mole)? (1)0.806 (2)1.24 (3)2.48 (4)5.16 i appreciate any help.

*January 3, 2011*

**Chem**

so for zinc it would be 65.3 ?

*January 2, 2011*

**Chem**

what is the gram atomic mass of zinc? is gram atomic mass the same as atomic mass ?

*January 2, 2011*

**trig**

Simplify the expression cotx divided by secx

*December 22, 2010*

**Math**

Many more depending on how you interpret the words of the song: 1 2 + 1 3 + 2 + 1 4 + 3 + 2+ 1 5 + 4 + 3 + 2+ 1 6 + 5 + 4 + 3 + 2+ 1 7 + 6 + 5 + 4 + 3 + 2+ 1 8 + 7 + 6 + 5 + 4 + 3 + 2+ 1 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2+ 1 10 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2+ 1 11 + 10 + 9 + 8 + 7...

*December 13, 2010*

**Math**

Can't figure out the answer either need the equation explaining the relationship between s & t

*December 9, 2010*

**Chem**

did I do this right Consider the following reaction at equilibrium N2(g) + O2(g) + heat < = > 2NO(g) Indicate how each of the following will shift the equilibrium a. raising the temperature of the reaction. b. decreasing the volume of the reaction container. c. adding a ...

*December 7, 2010*

**Math**

Luke bought some thing at the store. He paid $5.98 for a pizza, $3.75 for a case of soda $2.50 for a box of brownie mix and $1.01 in sales tax. What information is needed to find Lukes correct change?

*December 6, 2010*

**Math**

C. 4/32

*December 6, 2010*

**Math**

Which fraction also belongs in set a? set - 3/24, 5/40, 9/72, 6/48 a. 4/24 b. 2/8 c.4/32 d. 8/40

*December 6, 2010*

**Math**

Jairo ears $256 for 50 hours of work. Write an equation(proportion) to find x his wages for 76 hours of work

*December 6, 2010*

**Chemistry**

is this right Consider the following reaction at equilibrium N2(g) + O2(g) + heat < = > 2NO(g) Indicate how each of the following will shift the equilibrium a. raising the temperature of the reaction. b. decreasing the volume of the reaction container. c. adding a ...

*December 6, 2010*

**English 101**

What does uncanny and marvelous mean?

*December 4, 2010*

**English 101**

What does uncanny and marvelous mean?

*December 4, 2010*

**Chem**

Calculate the percent yield of eugenol obtained considering the fact that clove oil is approximately 16-19 % clove by weight of cloves. isolated eugenol=061g purity of eugenol in clove oil=99.6% (based on clove oil gas chromatograph) Estimate the % yeild for eugenol.

*November 28, 2010*