Monday

November 24, 2014

November 24, 2014

Total # Posts: 706

**physics**

An Atwood machine consists of two masses (m1 = 175 grams, m2 = 485 grams) connected by a string over a frictionless pulley. The initial height above the floor is 157 cm. Both masses start from rest at point A ; point B is just as m2 hits the floor. What is the kinetic energy ...
*February 23, 2011*

**math**

A single die is rolled once. What are the odds against rolling a prime number?
*February 18, 2011*

**science**

Why are the Catskills not really mountains? a the catskills are lowlands b all mountains must be volcanic in origin c the horizontal rock structure shows no deformation d the catskills are a direct deposit of the last pleistocene glaicer
*February 16, 2011*

**college algebra**

add 1 + 9 x+7 5x
*February 14, 2011*

**physics! (69)**

0.395
*February 7, 2011*

**Chemistry**

Raising the temperature of a sample of water will typically(decrease/increase) the solubility of (all/some) dissolved gases. Is it decrease, some?
*January 29, 2011*

**lit**

i need chapter summaries of the book The Quiet American by graham greene
*January 27, 2011*

**alg.2**

-2x+-6y=0 2x+6y=5 =5
*January 19, 2011*

**Maths **

285 liters of air.
*January 19, 2011*

**Physics**

A 1200 kg elevator is attatched to a cable whose tension is 11700 n. What is the magnitude of the elevator's acceleration? What is the Motion of the elevator? could have multiple answers.
*January 19, 2011*

**Math**

how did u wrk dat ou?
*January 18, 2011*

**chemistry help**

a 4.50 sample of LiCl at 25.0*C dissolves in 25.0 mL of water also at 25.0*C. The final equilibrium temperature of resulting solution is 60.8*C. What is the enthalpy of solution, of LiCL expressed in kilojoules per mole?
*January 18, 2011*

**chemistry help **

a 4.50 sample of LiCl at 25.0*C dissolves in 25.0 mL of water also at 25.0*C. The final equilibrium temperature of resulting solution is 60.8*C. What is the enthalpy of solution, of LiCL expressed in kilojoules per mole?
*January 18, 2011*

**physics**

Calculate the torque about the front support of a diving board, exerted by a 70 kg person 3.0 m from that support. (Take the positive direction to be clockwise.)
*January 17, 2011*

**Com170**

Write one paragraph explaining the key differences between the four types of writing (summary, analysis, synthesis, and evaluation). What do they mean.
*January 15, 2011*

**Drug Information Sources**

get a life tracey!!!!!!!!!!! whether someone checks 1 or 2 or all, its the SAME. go find something to do other than b*****ing and complaining on here
*December 22, 2010*

**physics**

A train traveling at a constant speed rounds a curve of radius 250 m. A chandelier suspended from the ceiling swings out to an angle of 15.5° throughout the turn. What is the speed of the train? what equation should i use?
*December 21, 2010*

**pre calc**

simplify: 2^x X 2^y +2^x X 2^y + 2^x X 2^y + 2^x X 2^y
*December 21, 2010*

**math**

i need to know how to solve this shark's teeth are shaped like triangles . the height of a tooth of a certain shark is 2cm longer than the base . the area is 12cm2 find the height and base.
*December 14, 2010*

**Math**

If $8,500 is invested at 6% compounded continuously, how long will it take to double the investment? How long will it take the original investment to grow to $14,586.06
*December 10, 2010*

**Math**

If $8,500 is invested at 6% compounded continuously, how long will it take to double the investment?
*December 10, 2010*

**Physics**

What is the amount of CO2 added to the earth's atmosphere each year from fossil fuels?
*December 9, 2010*

**11th grade**

A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.75, how long does it take to move the box 7 m, starting from rest? (If the box will not move...
*December 5, 2010*

**physics**

A box of books weighing 229 N is shoved across the floor by a force of 420 N exerted downward at an angle of 35° below the horizontal.If µk between the box and the floor is 0.57, how long does it take to move the box 9 m, starting from rest? (If the box will not move...
*December 5, 2010*

**MATH**

Misty uses 3/4 of a bag of noodles when she makes a cartain casserole. What is the greatest number of casseroles she can make from 6 1/4 bags of noodles?
*November 30, 2010*

**MATH**

Tina and her sister evenly split a $10 lottery winning. If tina promised to giver her brother 1/4 of her share what fraction of the original $10 did she give her brother?
*November 30, 2010*

**Math**

Tina and her sister evenly split a $10 lottery winning. If tina promised to give her brother 1/4 Of her share, what fraction of the original $10 did she give her brother?
*November 30, 2010*

**Math**

Laura takes a random survey of the students in her school. Of the 48 students asked, 16 plans to go to the football game. There are 231 students in her shcool. What proportion can she use to find s the total number of students expected to attend the game?
*November 30, 2010*

**Math**

Bob wants to buy cards with $20. Each card cost between $1.80 and $2.25. What is the maximum number of cards he can buy?
*November 30, 2010*

**Math**

Which statement is true about all prisms? A. Prisms have a pair of opposite faces B. The faces of a prism are congruent C. Prims have the same number of verticrs as edges D. The base of a prism is larger then the other faces.
*November 22, 2010*

**Math**

Meka plans to bake a large circular cookies for her brothers. She wants to decorate the outer edge of the cookie small pieces of choclate. The radius of the cookies is 7 inches.What would be the closest to the curcumference of the cookie?
*November 22, 2010*

**Math**

Meka plans to bake a large circular cookies for her brothers. She wants to decorate the outer edge of the cookie small pieces of choclate. The radius of the cookies is 7 inches.What would be the closest to the curcumference of the cookie?
*November 22, 2010*

**Math**

The width of a single cour is 3/4 of the width of the double court. Double court which is the base= 36 feet and the height= 78 feet What is the area of the singles court?
*November 22, 2010*

**statistics**

The average time to sew a pair of pants is 4.2 hours with a standard deviation of 30 minutes and if the distribution is normal then the probability of a worker finishing the pants in less than 3 hours is.
*November 16, 2010*

**physics**

an object is released from rest on a planet that has no atmosphere.the object falls freely for 3.46 m in the first second.what is the magnitude of the acceleration due to the gravity on the planet?
*November 7, 2010*

**spelling**

what is the correct abc order for sister's sisters sisters'
*November 4, 2010*

**accounting**

Jan.1 Beginning Inventory..300 units @ $3.00 Mar.5 Purchase..........… 900 units @ $4.00 Sept.3 Purchase...........… 1,000 units @ $5.00 Nov. 4 Purchase....… 500 units @ $7.00 During 2011, 1,000 units are sold at $10.00 each. Assume that the Periodic Invetory ...
*November 3, 2010*

**Calc**

At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)? I believe I should start with ...
*October 31, 2010*

**Calc**

At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)? Not a right triangle? You know...
*October 31, 2010*

**Calc**

Still trying to figure this out. Am i going in the right direction? c2=(12t)^2+(10t)^2-2(12t)(10t)Cos100
*October 31, 2010*

**Calc**

c^2=100^2-x+(-12t)^2-2(100-x)(-12t) Cos100 or maybe this?
*October 31, 2010*

**Calc**

Ok. So c^2=100^2+b^2-2(100)b Cos100 ?
*October 31, 2010*

**Calc**

At noon, ship A is 100 Kilometers due east of ship B, Ship A is sailing west at 12 k/h, and ship B is sailing S10degrees west at 10k/h. At what time will the ships be nearest each other and what time will the distance be? (not a right triangle)?
*October 31, 2010*

**Chemistry**

How many grams of HCl are produced according to the following equation, H2 + Cl2 = 2 HCl, when 4.0 g of hydrogen reacts completely?
*October 25, 2010*

**8th grade**

mr. macho ate 125 hotdogs over a five day peroid each day he ate seven more hotdogs than the previous day. how many hot dogs did he eat on the first day.
*October 24, 2010*

**physics**

Thank you drwls!
*October 23, 2010*

**physics**

How long does it take a plane, traveling at a speed of 170 m/s, to fly once around a circle whose radius is 2900 m?
*October 23, 2010*

**physics**

Me don't know
*October 15, 2010*

**Economics**

Which government bodies influence national fiscal policies that potentially affect the housing market?
*October 15, 2010*

**physics**

The mass ratio is 3.
*October 5, 2010*

**3rd grade**

Explain how 8 ten thousand can be equal to 80,000.
*October 5, 2010*

**calculus**

-ln(6x+1) + e^24x-1
*September 30, 2010*

**second grade**

it is 1,235,1469,2587,265,874 times 1million
*September 30, 2010*

**physics**

please HELP!!! What is the magnitude of the momentum of a baseball (m = 1.450 kg) traveling at a speed of 102 mi/h? Express your answer in SI units. I am unsure where to start
*September 26, 2010*

**physics**

A simple pendulum is made by attaching a small cup of sand with a hole in the bottom of a 1.2 m long string. The pendulum is mounted on the back of a small motorized car. As the car drives forward, the pendulum swings from side to side and leaves a trail of sand (15 cm from ...
*September 24, 2010*

**physics**

A certain car is capable of accelerating at a rate of +0.60 m/s2. How long does it take for this car to go from a speed of 20 mi/h to a speed of 65 mi/h?
*September 21, 2010*

**physics**

HELP PLEASE!!! A satellite moves in a circular orbit around Earth at a speed of 5085 m/s. (a) Determine the satellite's altitude above the surface of Earth. (b) Determine the period of the satellite's orbit.
*September 21, 2010*

**Physics**

A chain composed of four identical links is suspended by a rope and does not move. What are the forces on each chain? (include where they come from)
*September 21, 2010*

**biology**

are the antipodals hapliod or diploid?
*September 19, 2010*

**Math**

value of $25000.00 compounded semi annually at 7% for 5 years
*September 18, 2010*

**Calc 1**

y=108x-243
*September 17, 2010*

**Calc 1**

Find the equation of the tangent to the graph y=f'(x) at x=3 where f(x)=x^4 So I did : f'(x)=4x^3 y-81=4x^3(x-3) y=4x^4-12x+81 ?? Am i even remotely correct?
*September 17, 2010*

**Calculus 1**

According to Ohm's law, the voltage V, current I, and resistance R in a circuit are related by the equation V=IR, where the units are volts, amperes, and ohms. Assume that voltage is constant with V=12V. Calculate: The ROC of I with respect to R for the interval from R=8 ...
*September 16, 2010*

**math**

(x)/(x-8)= (x-7)/(x+3) how do u solve this for x?
*September 15, 2010*

**Honors Chemistry**

Due to the screening effect, the 3s electrons of magnesium (Mg) feel an effective nuclear charge (Zeff) of: 1. +1 2. +2 3. −2 4. +12 5. +4
*September 15, 2010*

**physics**

PLEASE HELP !!!!!!Find the acceleration reached by each of the two objects shown in figure below if the coefficient of kinetic friction between the 7.00 kg object and the plane is 0.250. img411.imageshack.us/img411/5841/p449.gif I keep getting 3.9=a
*September 13, 2010*

**physics**

You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is 199 kg, and you need to exert a force of 343 N to make it just begin to move. (a) What is the coefficient of static friction between the floor and the refrigerator? F=(mu)m*g 343\...
*September 9, 2010*

**physics**

A certain car is capable of accelerating at a rate of +0.60 m/s2. How long does it take for this car to go from a speed of 20 mi/h to a speed of 65 mi/h?
*September 8, 2010*

**calculus**

Oh, right . I forgot all about the -1. Thanks.
*September 7, 2010*

**calculus**

The sum from 0 to infinity of (-1)^n(3/3^n) is convergent or divergent? If convergent, what is the sum? I got that it's convergent and the sum is 9/2, but that's wrong.
*September 7, 2010*

**algebra**

Are the following true or false? 1. The difference of two natural numbers is always a natural number. 2. The sum of two natural numbers is always a natural number. 3. The quotient of two natural numbers is always a natural number. 4. The difference of two natural numbers is ...
*September 7, 2010*

**calculus**

Determine whether the sum from n=1 to infinity of arctan(2n^2/(25n+1)) converges or diverges. If it converges, what is the sum?
*September 7, 2010*

**Chemistry**

8.4cm = m 1333.8g=kg 119cm=mm 2391mL=L 3.22Mm=km 4.68fs=ps 8.86*10^11=Gm 1.57*10^-10m=picometers 381cm=in 94mm=in 5.0L=q 132kg=lbs
*September 6, 2010*

**physics**

A car is traveling at 28 m/s when the driver spots a large pothole in the road a distance 37 m ahead. She immediately applies her brakes. If her acceleration is -7.8 m/s2, does she manage to stop before reaching the pothole? What is this stopping distance?
*September 6, 2010*

**chemistry**

Nevermind I figured it out myself.
*September 3, 2010*

**chemistry**

Out of these choices what would you say? 1. The same number of electrons would be emitted, but they would have a lower velocity 2. The same number of electrons would be emitted, but they would have a higher velocity 3. No electrons would be emitted from the surface. 4. More ...
*September 3, 2010*

**chemistry**

We conduct an experiment by shining 500 nm light on potassium metal. This causes electrons to be emitted from the surface via the photoelectric effect. Now we change our source light to 450 nm at the same intensity level. Which of the following is the result from the 450 nm ...
*September 3, 2010*

**Biology**

What is the name given to the types of organisms that exclusively use aerobic cellular respiration to break down glucuse to produce ATP for energy? Provide three specific examples
*August 31, 2010*

**Math**

need help in identifying the y intercept for 2y+5=-2. my ordered pairs are (0,4) and (6,-2). I am visually impaired when it come to trying to see the tics. Thanks Bill
*August 28, 2010*

**english**

1. c 2.d 3.c 4.c 5.c 6.b 7.d 8.c 9.a 10.b
*August 20, 2010*

**MATH**

HOW LONG WILL IT TAKE A CAR BEING DRIVEN AT A SPEED OF 15 MILES PER HOUR TO TRAVEL 26,400 FEET? AN OBJECT MOVING AT A RATE 0F 15 MILES PER HOUR TRAVELS 22 FEET IN ONE SECOND.
*August 18, 2010*

**MATH**

How much larger than 327 is 609?
*August 18, 2010*

**MATH**

THE ANSWER IS 8,000,000,002
*August 18, 2010*

**MATH**

WRITE IN DIGITS EIGHT BILLION TWO.ANSWER SHOULD BE 8,200,000,000
*August 18, 2010*

**math**

When a ball is thrown up into the air, it makes the shape of a parabola. The equation S= -16t^2 + v*t + k gives the height of the ball at any time, t in seconds, where “v” is the init
*August 11, 2010*

**Physics**

Charge A and charge B are 2.00 m apart, and charge A is +3.90 C and charge B is +4.00 C. Charge C is located between them at a certain point and the force on charge C is zero. How far from charge A is charge C?
*July 16, 2010*

**Business**

Let us adopt the following symbols for the variables: · Sales: S ($) · Salesperson's level of education: E (Years of education). · Gender (M): We use a single dummy variable for two categories. If the observation is male, then the variable M=1, if ...
*June 21, 2010*

**physics**

Two masses are hanging over a frictionless, massless pulley as shown blocks_pulley_aMass m1 is 5.0 kg and mass m2 is 7.0 kg
*June 19, 2010*

**History**

but it wasnt a test.. its a chapter review i was trying to make it sound urgent so id get help
*June 7, 2010*

**History**

Why did president hoover's emphasis on voluntarism fail to resolve the problems of the great depression of the united states?
*June 7, 2010*

**math**

1. In a survey of a TriDelta chapter with 46 members, 13 were taking mathematics, 33 were taking English, and 6 were taking both. How many were not taking either of these subjects?
*May 21, 2010*

**Algebra**

f(x) = (x - 3)2, with domain [3, ∞) What is the range of function f?
*May 19, 2010*

**Algebra**

If f(x) = - 2x2 + 2x - 3, what is f(5)?
*May 19, 2010*

**algebra**

The radius of a large pizza is two times plus 3 inches larger than a small pizza. The area of the small pizza is 33 square inches less than the large pizza. What is the radius of the larger pizza?
*May 19, 2010*

**math**

The heights in inches of 18 randomly selected adult males in LA are listed as: 70, 69, 72, 57, 70, 66, 69, 73, 80, 68, 71, 68, 72, 67, 58, 74, 81, 72. Display the data in a stem-and-leaf plot. 1. Find the mean. 2. Find the median. 3. Find the mode. 4. Find the range. 5. Find ...
*May 19, 2010*

**College Chemistry**

Is 50.0mL of 1.0 MHF and 50.0 mL of 1.0M NaOH a buffer solution with a pH of 3?
*May 5, 2010*

**Chemistry**

What is the pH when 0.40 g of NaOH is added to 50,0 mL of 0.10 M HCOOH? No volume change. (Ka for HCOOH - 1.8 x 10^-4.)
*May 5, 2010*

**chemistry**

Write a net equation for the reaction between aqueous solutions of NH4Cl and Na2SO3.
*April 26, 2010*

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