Thursday

December 18, 2014

December 18, 2014

Total # Posts: 1,715

**College Physics**

A point on a rim of a 0.15-m-radius rotating disk has a centripetal acceleration of 5.0 m/s^2. What is the angular speed of a point 0.075 m from the center of the disk?
*June 8, 2010*

**Physics**

A 3.0-m rod is pivoted about its left end. A force of 6.0 N is applied perpendicular to the rod at a distance of 1.2m from the pivot causing a CCW torque, and a force of 5.2N is applied at the end of the rod 3.0m from the pivot. the 5.2N is at an angle of 30 degrees to the rod...
*June 8, 2010*

**wgu**

How did the moon landing help to change the way scientists understand an aspect of the natural world.
*June 8, 2010*

**english 3**

In olaudah equiano's "The Middle passage" what was his greatest fear when he boarded the ship
*June 3, 2010*

**english 3**

is fear an emotion
*June 1, 2010*

**english 3**

name two emotions Paine appeals to in his essay The Crisis
*May 31, 2010*

**english**

i have to write a declaration of independance what key words or [hrases should i use.
*May 21, 2010*

**Calculus**

Thank you! :)
*May 18, 2010*

**Calculus**

Differentiate: F(x)=e^(xsin2x) This isn't homework, it's review for our exam. Couldn't remember how to work it :( Thanks!
*May 18, 2010*

**accounting**

At the end of April, ABC company had a balance of $37,910 in vacations benefits payable account. During May, employers earned an additional $2,790 in vacation benefits, but some employee used vacation days amounting to $2,050 of vacation benefits.. The $2,050 was charged to ...
*May 18, 2010*

**physics**

Why can’t you take a photograph of your image in a plane mirror and focus the camera on both your image and on the mirror frame?
*May 13, 2010*

**Physics**

Please Help! In our everyday environment, diffraction is much more evident for sound waves than for light waves. Why is this true?
*May 13, 2010*

**poetry**

Can u please explain to me the poem On the wire by Robert service in detail?
*May 6, 2010*

**math**

what is 135/180 as a grade
*April 30, 2010*

**Courts**

Write a 1,100- to 1,400-word paper in APA format comparing the entertainment fiction of the court system with its reality. · Select examples from fictional portrayals of the courtroom found in books, movies, or television; for example, The Runaway Jury, A Few Good Men...
*April 27, 2010*

**photo**

What are the definitions to principals of design in photography?
*April 23, 2010*

**Chemistry**

2.91L
*April 16, 2010*

**English **

Write a sentence that matches the form provided in the description (Sentence with compound subject and action verb.) My Sentence is : The lizard and the cat jumped on the mouse. Now i need a second sentence to match my first sentence (Sentence with a proper noun and a linking ...
*April 16, 2010*

**Math**

the fatio is 12/38
*April 13, 2010*

**Physics**

A beam of mass mb = 10.0 kg, is suspended from the ceiling by a single rope. It has a mass of m2 = 40.0 kg attached at one end and an unknown mass m1 attached at the other. The beam has a length of L = 3 m, it is in static equilibrium, and it is horizontal, as shown in the ...
*April 9, 2010*

**Physics **

For B left side has m1 Right side has m2 picture looks like this ---------------------------------- I T= 637 I mb= 10kg I ------------------ ---------- <------x----------> I I I I I I m1 m2 ------------L=3m-------------
*April 9, 2010*

**Physics **

A beam of mass mb = 10.0 kg, is suspended from the ceiling by a single rope. It has a mass of m2 = 40.0 kg attached at one end and an unknown mass m1 attached at the other. The beam has a length of L = 3 m, it is in static equilibrium, and it is horizontal, as shown in the ...
*April 9, 2010*

**math**

A share of common stock has just paid a dividend of $2.00. If the expected long-run growth rate for this stock is 7%, and if investors require an 11% rate of return, what is the price of the stock?
*April 7, 2010*

**5th grade**

adVERB is for VERBS ajective is nouns
*March 29, 2010*

**US**

In 1938 Mexico nationalized America's oil, according to my textbook. What does this mean? I don't get what exactly they did.
*March 29, 2010*

**Chem**

I'm still not getting the correct answer: i have 2.00g/180.15g/mol =1.11*10^-2 1.11*10^-2/.6=1.85*10^-3 and (2.4_10^-3)^2/1.85*10^-3 = 3.11*10^-9. what am i doing wrong?
*March 28, 2010*

**Chem**

Aspirin (acetylsalicylic acid, ) is a weak monoprotic acid. To determine its acid-dissociation constant, a student dissolved 2.00 g of aspirin in 0.600 L of water and measured the pH . What was the Ka value calculated by the student if the of the pH of the solution was 2.62? I...
*March 28, 2010*

**chem**

Thank you for your help! That website did clarify things a bit. Thanks again!
*March 28, 2010*

**chem**

classify each of the following as a lewis acid or base: Cl- BeCl2 B(CH3)3 P(Ch3)3 Cl- is an acid right? i'm not sure i understand this concept very well. :[ and i tried looking at my notes already.
*March 28, 2010*

**College Chemistry**

Given the following equilibrium constants, Ka (NH4^+)=5.6*10^-10 Kb (NO2^-)=2.2*10^-11 Kw=1.00*10^-14 determine the equilibrium constant for the reaction below at 25*C. NH4^+(aq)+NO2^-(aq)f HNO2(aq)+NH3(aq)
*March 25, 2010*

**College Chemistry**

pH=pKa + log(base/acid) 3.95=3.465 + log(base/acid) .494=log(base/acid) 10^.494 3.1
*March 23, 2010*

**College Chemistry**

Never mind, I figured it out.
*March 23, 2010*

**College Chemistry**

Calculate the ratio of NaF to HF required to create a buffer with pH=3.95. Also, can you please explain in a nutshell the whole concept of buffers? Thanks!
*March 23, 2010*

**world issues**

which countries give money or military support to Syria?
*March 23, 2010*

**Chem**

Consider this reaction: CO (g) + H2O (g0 <---> CO2(g)+H2(g) kc=102 at 500 K A reaction mixture initially contains 0.145 M of CO and 0.145 M of H20. What would be the equilibrium concentration of [CO]? I so far have kc= [H2][CO2]/[CO][H2O]= 102 I know i have to set up an ...
*March 21, 2010*

**Algebra**

Use a graphing calculator, it would be super easier dude.
*March 19, 2010*

**Math**

Find the vertex of the parabola given by f(x) = x^2 - 3x + 4 My answer was (3,13). Am I correct?
*March 19, 2010*

**Math**

Find th evertex of the parabola given by f(x) = x^2 - 3x + 4 My answer was (3,13). Am I correct?
*March 19, 2010*

**Chemistry**

sorry i did not mean to submit this question multiple times, my internet connection is low and i didn't think it went through. i apologize.
*March 18, 2010*

**Chemistry**

Could you please find my mistake in this problem? I'm not getting the right answer. :[ Use the reactions below to predict the equilibrium constant for the reaction 2A(g)<->3D(g) A(s)<->1/2B(g)+C(g) k1=0.0334 3D(g)<->B(g)+2C(g) k2=2.35 I know that you have...
*March 18, 2010*

**Chemistry**

Could you please find my mistake in this problem? I'm not getting the right answer. :[ Use the reactions below to predict the equilibrium constant for the reaction 2A(g)<->3D(g) A(s)<->1/2B(g)+C(g) k1=0.0334 3D(g)<->B(g)+2C(g) k2=2.35 I know that you have...
*March 18, 2010*

**Chemistry**

Use the reactions below to predict the equilibrium constant for the reaction 2A(g)<->3D(g) A(s)<->1/2B(g)+C(g) k1=0.0334 3D(g)<->B(g)+2C(g) k2=2.35 I know that you have to make modifications according to the stoichiometric coeffecients. So do I divide k1 by 2...
*March 18, 2010*

**algebra**

Evaluate whether a prepaid or monthly cell phone plan is most effective for a customer that uses x weekday minutes per month. I can make up my own numbers for each plan. Having problems making up the equations.
*March 16, 2010*

**spanish**

In Spain, all hotels are new and modern buildings? True or false.
*March 15, 2010*

**College Math **

Find the exact value of: sin [2sin^-1 (-sq rt (3)/2)] how do i answer this question? i don't know how to find the answer.
*March 15, 2010*

**college math**

The range can be found by plugging the values of the domain in the equation. For example, 3/(-3-6)=-1/3 -1/3 is part of the range because the range represents the outputs or y values that correspond to the inputs (the domain), or x values
*March 15, 2010*

**Trig**

How do I solve the following? sec 3 theta/2 = 2 on the interval 0<theta<2 pi? I tried to look in my textbook but it doesn't have an example. I also tried google and I was unsuccessful> How do I do this question? I know that the period for sec is 2 pi but I don'...
*March 14, 2010*

**Chemistry**

For a reversible reaction where A + B (both arrows) C + D, the equilibrium constant is represented by kc = 5.3 = (c)(d)/(A)[B]. Initially A and B are present at 2.00 M each. What is the final concentration of A once equilibrium is reached. I made an ICE table and came up with ...
*March 11, 2010*

**Chemistry**

thanks, i double checked and everything looks right. i'm going with answer d. thank you again!
*March 11, 2010*

**Chemistry**

2H2 (g) + O2 (g) <---> 2H2O (g) what is the likely magnitude of the equilibrium constant? a) k < 10 ^-3 b) 10^-3<K<10^3 c)k=0 d)k>10^3 i know that choice c is incorrect because if k=o there would be no need to calculate equilibrium, but how would i go about ...
*March 11, 2010*

**College Chem II**

Determine the [H3O+] of a 0.160M solution of benzoic acid.
*March 7, 2010*

**College Chemistry**

THANK YOU!
*March 7, 2010*

**College Chemistry**

Thanks for your help! I understand number 2, but I still don't get number 1. Is there any other way to explain it?
*March 7, 2010*

**College Chemistry**

What is the pH of the following solutions? 1)a solution that is 5.4×10−2 M in HClO4 and 3.0×10−2 M in HCl 2)a solution that is 1.80% HCl by mass (Assume a density of 1.01g/mL for the solution.) Please help! I am so confused!
*March 7, 2010*

**CHEMISTRY**

Is non-dairy creamer a colloidal dispersion
*March 7, 2010*

**CHEMISTRY**

Would non-dairy creamer also be a colloidal dispersion when placed in water?
*March 7, 2010*

**CHEMISTRY**

If a pinch of flour is placed in water, does it form a coarse suspension, colloidal dispersion, or true solution? What about pepper? I thought both would be a coarse suspension
*March 7, 2010*

**CHEMISTRY**

Would non-dairy creamer also be a colloidal dispersion if it is put in water?
*March 6, 2010*

**CHEMISTRY**

When powdered milk is added to water, is it a coarse suspension, true solution, or colliodal dispersion? What about baking soda in water?
*March 6, 2010*

**physics**

Water flows over Victoria Falls, which is 128 m high, at a rate of 1.4 x 106 kg/s. If half the potential energy of this water were converted into electric energy, how much electric power would be produced by these falls?
*March 4, 2010*

**Math**

Ok i got that too... it comes to a fraction but then when you check it in the equations you don't get the same answer.
*February 28, 2010*

**Math**

Solve the system of linear equations by elimination. Thank You for your help. 8x+10y=3 3x-5y=2
*February 28, 2010*

**math**

6 6 6 6 = 5 fill in the expressions to make this equation true
*February 28, 2010*

**Calc**

how do i begin to solve this? integral of (1/x^2)sec(1/x)tan91/x)dx I tried substituting tan(1/x) for u but i couldn't get it to work...
*February 27, 2010*

**Calc**

that is actually the answer (that my book gives) how did you get that??
*February 27, 2010*

**Calc**

How do i begin to solve this? integralof dx/(cube root of 3x+4)
*February 27, 2010*

**Geometry**

B (i think)
*February 24, 2010*

**Physics**

Two blocks are connected by a light string passing over a pulley. The inclined surfaces are frictionless, and the effects of the pulley can be ignored. The value of m1 = m2 = 1.0 kg and θ2 = 43.4 degrees. If the blocks accelerate to the right with acceleration a = 0.280 m...
*February 23, 2010*

**physics**

Small, slowly moving spherical particles experience a drag force given by Stokes’ law: where r is the radius of the particle, is its speed, and η is the coefficient of viscosity of the fluid medium. (a) Estimate the terminal speed of a spherical pollution particle of...
*February 19, 2010*

**math**

MIX W 5 CUPS CONCENTRATE AND 8 CUPS COLD WATER. SUPPOSE YOU MAKE ONLY 1 CUP OF MIX W. hOW MUCH WATER AND HOW MUCH CONCENTRATE DO YOU NEED?
*February 16, 2010*

**english composition **

i have a hard time understanding to write essay and start paragraph
*February 13, 2010*

**college**

how do you start with an essay with contrast and compare about your life now and five years ago ?
*February 13, 2010*

**statistics**

If ten households in this area are selected at random, what is the probability that exactly two of them will be in violation of this law?
*February 11, 2010*

**Physics**

If you can throw a ball vertically upward to a height h = 30.5 m, what is the maximum horizontal range over which you can throw the same ball, assuming you throw it at the same initial speed?
*February 8, 2010*

**Physics**

A rock thrown horizontally from the top of a radio tower lands 20.0 m from the base of the tower. If the speed at which the object was projected was 11.50 m/s, how high is the tower?
*February 8, 2010*

**physics**

A ball is thrown upward from a platform 4.6 m high with a speed of 23 m/s at an angle of 40 o from the horizontal. What is the magnitude of its velocity when it hits the ground?
*February 8, 2010*

**AP world history**

Okay thanks, I'm writing a document based question and my teacher isn't very good at helping me with anything. I found the religions they gave me to work with so not helpful or relative to each other in anyway.
*February 7, 2010*

**AP world history**

Religions of common geographic origins tend to differ from others that originate in other areas of the world. How do religions having common geographic origins tend to share somewhat common codes of behavior and views or the nature and reason for existence?
*February 7, 2010*

**chemistry**

I put down that there are 98 protons, 3 neutrons
*February 4, 2010*

**chemistry**

State everything you know about the following atoms. Do NOT assume that they are balanced or neutral. Atomic number = 98 Mass number = 101
*February 4, 2010*

**Physics-College**

You have a 50V battery in a circuit with a single resistor R. If the resistor dissipates 200 J of energy in 5 seconds, what is its resistance?
*February 4, 2010*

**College Physics**

For the speed at which the ball was launched I got 18.12m/s. That part was right according to the computer. I didn't understand parts b or c of the question. For part a you multiplied vt by .608 instead of .6018 and that is why I got a different answer. Could you explain ...
*February 1, 2010*

**College Physics**

A playground is on the flat roof of a city school, 5.2 m above the street below (see figure). The vertical wall of the building is h = 6.50 m high, forming a 1.3-m-high railing around the playground. A ball has fallen to the street below, and a passerby returns it by launching...
*February 1, 2010*

**college Physics**

The coordinates of an object moving in the xy plane vary with time according to the following equations x = −7.16 sin ùt and y = 4.00 − 7.16 cos ùt, where ù is a constant, x and y are in meters, and t is in seconds. Write expressions for the ...
*January 31, 2010*

**college Physics I**

I have tried to put the numbers in the equation, but I am not getting the correct answer. Is there an easier way to explain it?
*January 29, 2010*

**college Physics I**

A playground is on the flat roof of a city school, 5.2 m above the street below (see figure). The vertical wall of the building is h = 6.50 m high, forming a 1.3-m-high railing around the playground. A ball has fallen to the street below, and a passerby returns it by launching...
*January 29, 2010*

**college Physics**

A playground is on the flat roof of a city school, 5.2 m above the street below (see figure). The vertical wall of the building is h = 6.50 m high, forming a 1.3-m-high railing around the playground. A ball has fallen to the street below, and a passerby returns it by launching...
*January 29, 2010*

**math/probability**

Assume that the weight loss for the first two months of a diet program has a uniform distribution over the interval 6 to 12 pounds. Find the probability that a person on this diet loses more than 11 pounds in the first two months.
*January 24, 2010*

**Chem Apps**

The solubility of sugar (surcose) in water is 4.0 g/mL at room temperature, what is the maximum amount of sugar that will dissolve in 850 mL of water?
*January 21, 2010*

**Chemistry**

The mass percent of a three component gas sample is 95.2% PF5, 1.40% C2H2 and 3.40% C3H6. Calculate the partial pressure (atm) of PF5 if the total pressure of the sample is 570.0 torr.
*January 20, 2010*

**4th grade**

I need to know I good way to do long division. The problem is: It takes 14 oranges to make a small pitcher of juice. Annette has 112 oranges. How many pitchers of juice can she make?
*January 20, 2010*

**spanish**

What does this mean: Cantas en el coro?
*January 14, 2010*

**Statistics**

I have to analyze a statistical research paper and have never done so. How do I analyze statistical data and where do I find sources to support my analysis?
*January 14, 2010*

**Social studies**

What word means to be the best in trade? None of my notes tell me this
*January 13, 2010*

**Cultural Diversity**

when looking for your community would you look up by the town in which you live in
*January 12, 2010*

**Math**

A square is inscribed in a circle of radius r. Express the length of the side of the square in terms of r.
*January 11, 2010*

**Calculus**

The function f is continuous on the closed interval [1,7] and has values in the table below x f(x) 1 10 4 30 6 40 7 20 Usinf the subintervals [1,4] [4,6] [6,7] what is the trapezoidal apporx. of the integral from 1 to 7 of f(x)dx? The answer: 160 I tried doing each interval as...
*January 11, 2010*

**Calculus**

Alright, I found -1/4cos(x)^4 but I didn't get the right answer. Did I dint the wrong anti-derivative? Do I have to do reverse chain rule and get... (-1/4cos(x))sin(x)^4?
*January 11, 2010*

**Calculus**

Let F(x) be an antiderivative of sin^3(x). If F(1)=0 then F(8)=? The answer: 0.632 How do I get to that answer? Do I find the antiderivatie and solve for F(x) when x=8?
*January 11, 2010*

Pages: <<Prev | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | **12** | 13 | 14 | 15 | 16 | 17 | 18 | Next>>