Sunday

March 1, 2015

March 1, 2015

Total # Posts: 859

**physics**

Find the linear speed of the bottom of a test tube in a centrifuge if the centripetal acceleration there is 5.5×104 times the acceleration of gravity. The distance from the axis of rotation to the bottom of the test tube is 8.0 .
*March 25, 2011*

**physics**

Two Astronauts A and B are working in the space shuttle in the space.Suddenly the hammer falls from the hands of astranaut in space. who will hear most sound,Astranonaut A or B .and why?
*March 15, 2011*

**math**

25=50*40x 25=2000x x=2000/25 x=80 therefore the value of x is 80
*March 15, 2011*

**Physics concept question**

B: The current-carrying wire produces a magnetic field at the location of the charge. This magnetic field exerts a force on the charge.
*March 7, 2011*

**Algebra**

3x to the second power,minus 15x plus 18 is????
*March 6, 2011*

**math**

I need help graphing equations and inequalites like 5x+4y=20,6x-2y=-4,3x+y=5, and -3x-y=0
*February 23, 2011*

**sociology**

I am having a hard time writing a paper, I am not just not sure what dominant American culture is. I know the American culture is religion, holiday's, some foods, but I just cant help but think their is more to it. I would appreciate any help in the right direction, thanks.
*February 19, 2011*

**Geometry**

Which shows the correct coordinates for the reflection of the point over the line y = -4 a. (-6,9)->(-6, 17) b. (-6,9)->(6,-17) c. (-6,9)->(-10,-9) d. (-6,9)->(2,-9) I how to reflect over a line. Can you help me please?
*February 18, 2011*

**World History**

How did Muslim merchants influence the devolopment of trade in Africa?
*February 17, 2011*

**Geometry**

How do i do glide reflection on a graph? example. which glide reflection could map figure ABC to figure A'B'C'? a.translation of <-1,-2> and reflection over the line x= =1 etc. I cant show you the graph but im stuck on glide reflection for graphs. Help please.
*February 16, 2011*

**AP European History **

Actually, I am Christina. Alex is my friend, we are working on our practice essays together. :) This is question 2, the other one is question one. Thanks for the help, though!
*February 11, 2011*

**AP European History **

How did Medieval Europe lay the groundwork for the re-birth of Europe (Renaissance)? What conditions existed that allowed Europe to evolve out of medieval conditions? I don't even know where to start, other than that I know that monarchs began to solidify their authority. ...
*February 11, 2011*

**gr.10 math**

Okay, so with the first part, 5(2y+1), you distribute the 5 to BOTH parts of what is inside the parentheses, so you have 5(2y) + 5(1). That gives you 10y + 5. Now, for the second part of the equation. When you have that negative in front of that parentheses, that means you ...
*February 11, 2011*

**health**

I think it would because more people are seeking health care now, medical treatments are more extensive and sophisticated now then ever before, the cost of training health care professionals,increase in lawsuits, as people live longer they require more health care, fraud by ...
*January 31, 2011*

**Math(Please check)**

The y-intercept is correct, but -5400 would not be the slope of the line. Remember that slope represents the rate of change, specifically the change in y divided by the change in x. In this case, y is the value of the automobile and x is the year. If that doesn't help, I ...
*January 30, 2011*

**Math**

What is the mathematical term for a statement that can be flipped and still remain true? Example: A cat is a feline, and a feline is a cat. AND/OR What is the mathematical term for a statement that becomes false when flipped? Example: A square is a rectangle, but a rectangle ...
*January 30, 2011*

**sociology**

I need some advice on a paper with the sociological perspective icluds history, biography, social lcation, macro-leve-microlevel and theorcical perspectives on 9-11 survivors
*January 28, 2011*

**Visual Arts**

what are the 5 parts of a sphere? in order please from left to right (lightest to darkest)
*January 20, 2011*

**Math- Algebra II**

thank you
*January 19, 2011*

**Math- Algebra II**

9x^4/16y^6 How to I simplify it must be written in exponential form and no negative exponents. HELP
*January 19, 2011*

**Psychology final**

Informational Interview Your final project for this course will be a 3- to 5-page paper that consists of the insights you have gained about yourself, your experience with this course, and the information you learned about your career choice during your informational interview...
*January 17, 2011*

**physics**

An automobile tire is rated to last for 45,000 miles. Estimate the number of revolutions the tire will make in its lifetime.
*January 13, 2011*

**quant. methods**

yes but how could it be 937.50 minutes when you will pay 100 or 55 dollars either way for 1200 or 1000 minutes. It would need to be over those minutes.
*January 13, 2011*

**quant. methods**

cant be
*January 13, 2011*

**quant. methods**

Kim is deciding between two cell phone plans. Plan A charges a fixed monthly fee of $100 for 1200 minutes and .25 per minute over 1200. Plan B charges a fixed monthly fee of $55 for 1000 minutes and .33 per minute over 1000. At what point of usage would Kim be indifferent ...
*January 13, 2011*

**HIstory **

How did it affect the Guarani Indians when they were first encountered the conquistadors?
*January 9, 2011*

**math**

answer this x-1/3=1/4
*January 6, 2011*

**math**

answer this x-1/3=1/4
*January 6, 2011*

**math**

answer this x-1/3=1/4
*January 6, 2011*

**Math- Algebra II**

x^2-4x+12=0 Complete the square to solve for x. Okay I know how to do up to here: (-4/2)^2 -12=x^2-4x(-4/2)^2 2-12= x^2-4x+2 -10= DO I FACTOR IT?
*January 5, 2011*

**Math- Algebra II **

thank you, okay I wasn't' sure
*January 5, 2011*

**Math- Algebra II **

Simplify (7-3i)^2. So would I do this: (7-3i) (7-3i) then distribute it .... OR (7-3i)^2 square everything 49+9i^2 ? thanks
*January 5, 2011*

**math**

the study hours are 4, 10, 20, 24, 34, 36, 42 and the z scores are 2.5, negative 1.75, negative .5, 0, 1.25, 1.5, 2.25 and the percentile ranks are 10,25,35,40,50,75,95 what is the study hour with a z score of 1.75, what is the standard deviation of all the students, and what ...
*December 20, 2010*

**Statistics**

In a survey of 1037 adults from the United States age 65 and over, 643 were concerned about getting the flu. Construct a 90% confidence interval for the population proportion.
*December 15, 2010*

**Finite Math**

I keep trying to set up this problem to solve it using the Simplex Method, but I can't seem to get the tableau set up correctly. If anyone could help, I would appreciate it: A baker has 150 units of flour, 90 of sugar, and 150 of raisins. A loaf of raisin bread requires 1 ...
*December 9, 2010*

**Algebra**

Solve by elimination method. 7r-3s=14 3r+7s=64 Could never figure out the elimination method. Would love some help with this one. Thanks
*December 7, 2010*

**Precalculus**

I've tried many times to get the equation to balance using trig identities like half-angle formulas, power-reducing formulas, and double angle formulas, but I couldn't get the equation to equal out. I only need to work one side to make it equal to the other, like a ...
*December 2, 2010*

**Precalculus**

How do I solve this? 1 - 4sin^2(x)cos^2(x) = cos^2(2x)
*December 2, 2010*

**5th grade**

Consider: 4 children - .5 x 4 = $2 1 man - 1 x 2 = $2 32 women - 32 x 3 = $96 total = $100
*December 2, 2010*

**Algebra**

Solve: -10<=4x-5<--4
*December 1, 2010*

**physics**

Thanks for your help :)
*November 12, 2010*

**physics**

A gas is taken though a single process in which its volume decreases by .25 m^3 as the temp of the gas rises 2deg C. Which of the following people are more likely to have reached the correct conclusion? a. Bob ids this process as adiabatic b. Jill ids this process as ...
*November 12, 2010*

**physics**

A spring that is .7m in length elongates to 1.06 m when a 20 newton force is exerted to stretch the spring. By how much more does the spring stretch when an additional 8 newtons of force is exerted on it?
*November 12, 2010*

**physics**

A 5 kg block of average density .625 kg/m^3 has a volume of about _____ cu. m
*November 12, 2010*

**physics**

An observer detects an apparent frequency of 505 hz coming from a 500 hz source. Which is true? a. the observer is moving due east, away from the stationary source b. the source is moving due west, away from the stationary observer c. the souce and the observer are moving away...
*November 12, 2010*

**physics**

A dinner plate drops and breaks. This best illustrates the ______ law of THERMODYNAMICS A. 1st b. 2nd c. 3rd d. 4th
*November 12, 2010*

**chemistry**

Salicyclic acid reacts with methanol to produce methylsalicyclate or winter green and water according to the following reaction: C7H6O3 (s) + CH3OH (l) --> C8H8O3 (s) + H2O (l) What mass methylsalicyclate can be produced from 15.00 grams of salcyclic acid? What mass of ...
*November 8, 2010*

**chemistry**

Calcium carbonate reacts with hydrochloric acid according to the following reaction: CaCO3 (s) + 2 HCl (aq) --> CaCl2 (aq) + H2O (l) + CO2 (g) How many grams of calcium carbonate would be required to neutralize 50.0 cm3 of 8.00 M HCl?
*November 7, 2010*

**logarithmic differentiation**

How do you find the logarithmic differentiation of y = x^6x?
*November 4, 2010*

**logarithmic differentiation**

How do you find the logarithmic differentiation of y = x-cos x ?
*November 4, 2010*

**Physics**

Thanks! :)
*October 31, 2010*

**Physics**

a 10 kg ball moving due west at 2m/sec collides with a 4kg ball that is moving due east at 3 m/sec. You determine that immediately after the collision the 10 kg ball is moving due west at 0.57 m/sec. A) this probably IS a Totally inelastic collision B) this definitely is NOT a...
*October 31, 2010*

**Physics**

A 10 kg ball moving due west at 2m/sec collides with a 4kg ball that is moving due east at 3 m/sec. You determine that immediately after the collision the 10 kg ball is moving due west at 0.57 m/sec. How do I set up the equations to find the answer?
*October 26, 2010*

**Science**

Where are memories stored in your brain?
*October 21, 2010*

**math**

when doing decimoles and multiplying them by whole numbers...for example 4.7805 multiplyed by 1000 dose the decimole go 4places over or 8places over i dont get it please help!!!
*October 19, 2010*

**Physics **

Thank you so so much And I also posted another physics question down below if you don't mind helping me out?
*October 6, 2010*

**Physics **

A weight of 50.0 N is hung from the center of a stretched horizontal wire 10.0 meters long. It causes the wire to say 1.00m at its center. What is the force exerted by each half of the wire in supporting the weight?
*October 6, 2010*

**physics**

an electric sign weighing 200 newtons is supported by two slanting cables. each cable is attached to the same point of the sign and makes a 45 degree angle with the horizontal. what is the component of the force exerted by the sign along each of its cables?
*October 6, 2010*

**algebra**

The answer should be 14. Substitute "6" for every "x" and solve.
*October 6, 2010*

**Chemistry **

5,2
*September 28, 2010*

**Chemistry **

Between which two orbits of the Bohr hydrogen atom must an electron fall to produce light of wavelength 434.2nm?
*September 28, 2010*

**World History**

From 8000Bc- 600 AD This is talking about the fall of Rome and greece.
*September 28, 2010*

**World History**

what classical traditions and institutions survived despite the fall of the states? Please I really need help, I have no notes on this.
*September 28, 2010*

**spanish**

why can't u google it?
*September 28, 2010*

**World History**

I don't know, mabye it's a typo. Just ignore that word.
*September 28, 2010*

**World History**

describe the spread of sedentary agriculture outside the older civilized areas
*September 28, 2010*

**english**

Notes, Feelings, Diary, Storys, Essays, Thoughts, Pictures.
*September 27, 2010*

**World History**

aryans is an old english language?? and guptas was an ancient Indian empire
*September 27, 2010*

**World History**

explain the beliefs of Hinduism and its evolution from the aryans to the Guptas. WHO ARE THE ARYANS AND THE GUPTAS? please help :(
*September 27, 2010*

**math**

1/33 percent of 600?
*September 27, 2010*

**BIOLOGY**

GOOOGLE. EASY question for google. com
*September 27, 2010*

**MATH**

divide all the points given by two then graph them and connect the points. (:
*September 27, 2010*

**math**

tyrell because you must round it up because it is over 749 it rounds up.
*September 27, 2010*

**World History**

what does it mean by institutions? How do I describe Legalism?
*September 27, 2010*

**World History**

Describe the teachings and institutions of Confucianism Dadaism and legalism
*September 27, 2010*

**6th grade**

With different kind of maps
*September 27, 2010*

**spanish**

Or google translate!
*September 27, 2010*

**Repost-- ms. sue.**

Thank you!!!!!!!! I love <3 this site.
*September 26, 2010*

**Repost-- ms. sue.**

how were the first civilizations similar and different? They all had a social hierarchy, and some sort of government. The main type of ecominic income was agriculture-i think-. That's all I know
*September 26, 2010*

**physics**

483000 in what units?
*September 26, 2010*

**physics**

That's wrong Muilitpy 3* 5280
*September 26, 2010*

**physics**

K cool. first step 3 miles * 5280 ft __________________ 1 ft 1 mile. Now muilitply top times top ( 3 times 5280) and then divide it by the answer at the bottom when u muiltply. (1 times 1)
*September 26, 2010*

**physics**

Okay first you have to go from miles to ft then to iniches and then to cen? right? So you put what your trying to find on top. I'm not going to do this for you so tell me, how many feet are in a mile?
*September 26, 2010*

**Random?**

to get different opinions.
*September 26, 2010*

**MATH**

One quarter is 1/4 or .25 so * .25 * 6= ? Then do the same thing you did for A and there you go (:
*September 26, 2010*

**MATH**

Make the ft into ins. (12 in. in a foot) and muilitpy length *width *height.
*September 26, 2010*

**World History**

Oh, okay. They all had a social hierarchy, and some sort of government. The main type of ecominic income was agriculture-i think-.
*September 26, 2010*

**World History**

thank you, please help me.
*September 26, 2010*

**World History**

how were the first civilizations similar and different?
*September 26, 2010*

**World History**

8000 BC-600 CE I don't know
*September 26, 2010*

**World History**

How did civilized culture survive the rise and fall of regional states?
*September 26, 2010*

**CHEM**

3, because the 0 don't count, they would count if the number had a decimal point at the end, but it doesn't so 3.
*September 26, 2010*

**algebra**

3z^8 over 7p^3 multiplied 49p^5 over 9z
*September 17, 2010*

**An Overview of Teaching Techniques**

12.) is wrong CORECT ANSWER IS C.
*September 15, 2010*

**An Overview of Teaching Techniques**

12.) is wrong
*September 15, 2010*

**Chemistry**

A 2.52g sample of a compound containing only carbon, hydrogen, nitrogen, oxygen, and sulfur was burned in excess O to yield 4.36g of CO2 and 0.892g of H20. Another sample of the same compound of mass 4.14g, yielded g of SO3. A third sample, of mass, 5.66g, yielded 2.80 g of ...
*September 6, 2010*

**economics**

can anyone explain to me how to solve for P, if Q=240-2P?
*August 26, 2010*

**economics**

HELP!!!!! One and only Inc is a monopolist. The demand function for its product is estimated to be Q=60-0.4P +6Y+2A Y=3,000 P=Price per Unit Y=Per capita disposable personal income (thousands of dollars) A=hundreds of dollars of advertising expenses The Firms average variable ...
*August 25, 2010*

**11th grade**

According to Bohr model, what determines the color of light emitted when an electron moved from one energy level to another?
*August 25, 2010*

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