Thursday

June 30, 2016
Total # Posts: 1,272

**physics**

In the amusement park ride known as Magic Mountain Superman, powerful magnets accelerate a car and its riders from rest to 55 m/s (around 120 mi/h) in a time of 6.1 s. The mass of the car and riders is 5000 kg. Find the average net force exerted on the car and riders by the ...
*September 11, 2011*

**Physical Science**

A 40-kg skater moving at 4 m/s overtakes a 60-kg skater moving at 2 m/s in the same direction and collides with her. The two skaters stick together. What is their final speed?
*September 11, 2011*

**Physical Science**

A 1000-kg car moving at 80 km/h collides head on with a 100-kg car moving west at 40km/h, and the two cars stick together. Which way does the wreckage move and with what initial speed?
*September 11, 2011*

**Physical Science**

A 40-kg skater moving at 4 m/s overtakes a 60-kg skater moving at 2 m/s in the same direction and collides with her. The two skaters stick together. What is their final speed?
*September 11, 2011*

**Physical Science**

I dont understand how to work it?
*September 11, 2011*

**Physical Science**

A boy throws a 4-kg pumpkin at 8 m/s to a 40-kg girl on roller skates, who catches it. At what speed does the girl then move backward?
*September 11, 2011*

**Physical Science**

A force of 10 N is used to lift a 600-g ball from the ground to a height of 1.8 m, when it is let go. What is the speed of the ball when it is let go??
*September 11, 2011*

**Physics**

A rocket starts from rest and moves upward from the surface of the earth. For the first 10s of its motion, the vertical acceleration of the rocket is given by a_y =( 2.70m/s^3)t, where the +y-direction is upward. 1) What is the height of the rocket above the surface of the ...
*September 10, 2011*

**Finance**

You are considering the purchase of an industrial warehouse. The purchase price is $1 million. You expect to hold the property for five years. You have decided to finance the acquisition with the $700,000 loan, 10 percent interest rate, 30- year term, and annual interest-only ...
*August 30, 2011*

**ka**

but todays august 25,2011 :P
*August 25, 2011*

**ka**

ohhh withoutnumbers whoops
*August 25, 2011*

**ka**

5 28 11
*August 25, 2011*

**Precal**

THAAAAAAANK YOOOOOOU.
*August 25, 2011*

**Precalculus**

find any intercepts of the graph of the given equation. determine whether the graph of the equation possesses symmetry with respect to the x-axis, y-axis, or orgin |x|+|y|=4
*August 25, 2011*

**Precalculus **

find any intercepts of the graph of the given equation. determine whether the graph of the equation possesses symmetry with respect to the x-axis, y-axis, or orgin y=x^2-2x-2
*August 25, 2011*

**Precalculus **

thank you damon! that was exactly what i was looking for, by the way it's 4:32 am here and i've been searching for that answer for hours...
*August 25, 2011*

**Precalculus **

find any intercepts of the graph of the given equation. determine whether the graph of the equation possesses symmetry with respect to the x-axis, y-axis, or orgin y=x^2-2x-2
*August 25, 2011*

**Health **

Why is support important for situations involving abuse?
*August 24, 2011*

**Health education**

Describe why people tend to turn their backs and tell themselves there is nothing wrong when addressing physical and emotional abuse in relationships. Discuss the importance of support in your answer.
*August 23, 2011*

**Health education**

I didnt know which subject it is...
*August 23, 2011*

**Random Question**

Describe why people tend to turn their backs and tell themselves there is nothing wrong when addressing physical and emotional abuse in relationships. Discuss the importance of support in your answer.
*August 23, 2011*

**Random Question**

Explain some consequences of falling 'in love' with someone who acts in an improper manner.
*August 22, 2011*

**English**

is it physicak and emotional abuse?? and for 2, is it that she may be really smart in bookthings but shes not smart when itr comes to relationships ?
*August 22, 2011*

**math**

I tried that and it said that it was the wrong answer.
*August 21, 2011*

**math**

A ramp 10 feet in length rises to a loading Platform that is 4 feet off the ground. What is the angle of elevation of the ramp in degrees? Do I use the law of cosines? When I do though I'm getting a little confused what to do.
*August 21, 2011*

**Math**

A ramp 10 feet in length rises to a loading Platform that is 4 feet off the ground. What is the angle of elevation of the ramp in degrees? Do I use the law of cosines? When I do though I'm getting a little confused what to do.
*August 20, 2011*

**math**

solve using add. method 4x=-6+5y 8x+4y=-3
*July 18, 2011*

**Stats**

a raw score on a particular intelligence test is known to be approximately normally distributed in a population of 4th graders, with a mean of 95 and variance 81. which score has the property that there are 15% of scores in the population that are above it?
*July 15, 2011*

**science (universe)**

describe the big bang theory about the origin of the universe.
*June 27, 2011*

**Law**

1. why is employment based on contract law? 2. where did the idea of 'circle sentencing come from?
*June 24, 2011*

**another law question**

where did the idea of 'circle sentencing' come from?
*June 18, 2011*

**law**

Why is employment based on contract law?
*June 18, 2011*

**Commerce**

Why is employment based on contract law?
*June 15, 2011*

**geography**

How does urbanization affect culture? (is it because where they settle they also see other cultures and bring there cultures for others to see?)
*June 13, 2011*

**Elementary Statistics**

5*4*3= 60
*June 8, 2011*

**Math**

If $ 2500 is invested in an account that pays interest compounded continuously, how long will it take to grow to $ 5000 at 3%? Round to the nearest tenth
*June 8, 2011*

**Math puzzle**

The Answer you seek is "bridge" it is asking you to use the old style od texting on a standerd cell phone(no key board) 2 (2 times)= B Etc. Etc,
*June 5, 2011*

**English**

is a critical response of a poem the same as a poem analysis? if not what is a critical response?
*May 29, 2011*

**Physics I**

A car can decelerate at -4.40 m/s2 without skidding when coming to rest on a level road. What would be the magnitude of its deceleration if the road were inclined at 12° uphill? Assume the same static friction coefficient.
*May 25, 2011*

**government**

A colony of a country that followed mercantilism during the 17th century would NOT be encouraged to develop __________. A. farming B. fishing C. slavery D. its own form of government
*May 18, 2011*

**English (Robert Frost)**

Can someone please make a literal meaning for each line in Robert Frost's Poem 'Out, Out'? (For lines 27-34 only) and techniques used? So. The hand was gone already. The doctor put him in the dark of ether. He lay and puffed his lips out with his breath. And then...
*May 15, 2011*

**History **

I need to write a one page extended response for the supporters of the Vietnam War. I was wondering if you could give me an idea of how to start it and a "guideline" becaseu I am really desperate
*May 12, 2011*

**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 11, 2011*

**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*

**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 dont 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 dont 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*