Thursday

May 28, 2015

May 28, 2015

Total # Posts: 702

**Physics**

A physics student of mass mm = 100 kg gets a summer job painting houses. On his first project, he builds a platform using large pine board with a mass of mb = 60 kg The board has an overall length of L = 8.5 meters and set on two 1 meter tall saw horses so that l = 2.25 ...
*April 9, 2010*

**Biology---Urgent!**

if you are using APA, then its the (author, p. 4-9) I believe.
*April 5, 2010*

**Chemistry New question**

If 12.5 mL of 8.6 multiplied by 10-2 M NaOH is added to 32.5 mL of 6.0 multiplied by 10-4 M NaOH, what is the pH of the solution?
*April 5, 2010*

**Chemistry: Acid Base Equilbria**

pH = .5 (pka1)
*April 5, 2010*

**Chemistry**

A 1.50 M solution containing 25 Grams of Al(OH)3 would occupy what volume in liters?
*March 29, 2010*

**map**

How do you draw a net duagram for a group of cubes???!!!
*March 23, 2010*

**frictonsplease**

please help with frictions thanks
*March 19, 2010*

**5th grade**

What events led up to the Civil War? A State's Rights B Slavery C All of the above
*March 19, 2010*

**U.S. History 5th grade**

Who was the 21 president?
*March 19, 2010*

**5th grade**

Who was the 100 year war between? I honestly have no idea.
*March 18, 2010*

**5th grade**

What did the 100 year war do the economy?
*March 18, 2010*

**4th grade social studies**

Neither sides are involved in a war perhaps.
*March 17, 2010*

**english**

after the rain ended, the sky became blue --is this a complex sentence?
*March 14, 2010*

**english**

the sentence--marsha speak excellent german should german be capitlized
*March 12, 2010*

**math**

Hey I need some help with this problem. Any ideas on how to solve it? Thanks lots. : A hardware supplier manufactures three kinds of clamps, types A, B and C. Production restrictions require them to make 10 units more type C clamps than the total of the other types and twice ...
*March 12, 2010*

**english**

compound words -which is correct thirty one -self-evident -QUICKLY-RUNNING -OR SPUR OF THE MOMENT-DECISION
*March 11, 2010*

**Geography**

reduced the number of Communist nations in the world did not afffect the United States change boundries in Europe ---------------------- A referendum for the preservation of the USSR was held on 17 March 1991, with the majority of the population voting for preservation of the...
*March 10, 2010*

**Science-Chem**

Sucrose, C12H22O11, is burned to produce carbon dioxide and water. What is the balanced formula and reaction type?
*March 8, 2010*

**math**

Bill, Ernie, Oscar, Sammy and Tony are the five basketball players on the starting team of the varsity squad. Each one is known by a different one of these five nicknames: Slats, Stretch, Tiny, Tower, and Tree. From the information given, determine the nickname of each player ...
*February 24, 2010*

**math**

Bill, Ernie, Oscar, Sammy and Tony are the five basketball players on the starting team of the varsity squad. Each one is known by a different one of these five nicknames: Slats, Stretch, Tiny, Tower, and Tree. From the information given, determine the nickname of each player ...
*February 24, 2010*

**Chem answer check/ help**

For each of the following water-soluble compounds, indicate the ions present in an aqueous solution: NaI K2SO4 NaCN Ba(OH)2 (NH4)2SO4 would the answer to NaI be Na+ I-? Should there be more to my answer? Would K2SO4 be K+ SO-? Thanks for the explanation.
*February 22, 2010*

**Chem answer check **

Which of the following are strong electrolytes? BaCl2 AgNO3 PbI2 Pb(NO3)2 KI I think they are all strong electrolytes. Is this correct?
*February 22, 2010*

**Math**

looking for help with find the slope and the y intercept for y = 5 please help
*February 18, 2010*

**AP Chemistry**

The heat of reaction for burning 1 mole of a certain compound X is known to be -477.7 kJ. The calorimeter constant of the bomb being used is 2500 j/degree celsius and the initial temperature of the water is 23.2 degrees celsius. a) if 22.54 g of compound X (MM=46.0) is burned ...
*February 15, 2010*

**5th grade language arts**

could someone give me some examples of entertaining sentences?
*February 9, 2010*

**grammer**

We are proof reading phrases for errors. aunt rose, one of my favorite aunts This is my corrected phrase: Aunt Rose, one of my favorite aunts
*February 2, 2010*

**math**

A recipe that makes 9 servings calls for cups of juice. How many cups of juice are there per serving?
*January 21, 2010*

**Geography**

A. Land use is affected by settlement patterns. C. Settlement patterns provide information about the people living in specific areas. D. Resource availability influences where people settle. Relief,climate,resources,technology, Government policy influences the settlement ...
*January 11, 2010*

**Trig**

triangle with side lengths 172m, 155m, and 155m. calculate the area.
*January 9, 2010*

**basics and tools of floral design**

what is the most effective way for you to loctate local growners to supply your designs needs
*December 16, 2009*

**4th grade**

factoring the tens how to find the product using rectangles
*December 9, 2009*

**4th grade**

factoring the tens how to find the product using rectangles
*December 9, 2009*

**algebra 10 grade**

Factor this expression completely 36y2 - 1
*December 7, 2009*

**algebra 1**

Factor completely 36x2 + 60x + 25 Factor completely 4n2 + 28n + 49
*December 7, 2009*

**algebra 1**

Factor this expression completely 9a4 - b2
*December 7, 2009*

**british literature**

Using an example from Macbeth, explain Shakespeare's use of chronographing in Macbeth. I understand that chronographing is the study of past events but I don't understand how that relates to Macbeth.
*December 7, 2009*

**british literature**

explain shakespeares use of chronographing in macbeth
*December 7, 2009*

**Wave Motion Physics**

A transverse wave on a string is described by the following equation. y(x, t) = (0.35 m) sin[(1.25 rad/m)x + (92.8 rad/s)t] Consider the element of the string at x = 0. (a) What is the time interval between the first two instants when this element has a position of y = 0.303 m...
*December 2, 2009*

**Physics (answers included)**

Two mountains are 1.00 km apart. If their masses are identical (2.00 × 1010 kg), what is the force due to gravity between the mountains? Fg=(GMm)/ r^2 =(6.67x10^-11 N*m^2/kg^2)(1010kg) (1010kg)/ (1000m)^2 =6.80x10^-11 N But the possible answers are: 2.67x 10^4 N 1.33x 10...
*November 22, 2009*

**grammar**

our cat katie usually drags its food out of the dish when its happy -Capital at the beginning of the sentence -Comma after cat -Capital for the noun's name -Apostrophe on both 'its' to show posession -Period at the end of the sentence so: Our cat, Katie usually ...
*November 22, 2009*

**physics**

The following forces act on a hockey puck (round, rubber disk) sitting on a frictionless surface: F_1 = 12 N at 15 degrees; F_2 = 28 N at 125 degrees; and F_3 = 33.3 N at 235 degrees. All the forces are in the plane of the ice. Determine the net force on the puck.
*November 16, 2009*

**Math**

No,you can also multiply.
*November 12, 2009*

**Math**

Is it true that when you put together unequal groups, you can only add/
*November 12, 2009*

**chemistry**

Which one of the following is NOT a Lewis acid-base reaction? 1. ) Ca + S --> Ca2+ + S2- 2. ) BeF2 + 2 F- --> BeF42- 3. ) H+ + -O-H --> H-O-H 4. ) NH3 + BF3 --> H3N-BF3 i thought it was 1...but im not sure...but i know that 3 & 4 are definatly right.
*November 8, 2009*

**English**

I hate to read and I did not read the book THe Guns of Navarone. I have to answer one question for four categories; Comprehension, Extending Understanding, Text Analysis, and Context Analysis. Help?
*October 26, 2009*

**Science**

How many stars form the bowl of the Big Dipper and What part of a carrot plant could be considered a wedge?
*October 26, 2009*

**7th grade**

WITH A(0,2),B(6,2)AND C(4,4) APPLY THE RULE (1.5X,1.5Y) TO THE VERTICLES OF TRIANGLE ABC TO GET TRIANGLE PQR. COMPARE THE CORRESPONDING MEASUREMENTS(SIDE LENGHTS,PERIMETER,AREA, AND ANGLE MEASURES) OF THE TWO TRIANGLES? THIS IS THE 1ST QUESTION OF 5 I HAVE TO DO, AND I DON'...
*October 21, 2009*

**HELPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!**

The three smallest bones in the human body are located in the middle ear. What are they called?
*October 20, 2009*

**Math**

would the derivative of this be 0/1-1/0? problem: 5/x-x/6
*October 19, 2009*

**math**

7y-5+2y+7y-5+2y
*October 13, 2009*

**math**

a+2a+10-3a
*October 13, 2009*

**math**

x+x+5+2x+1
*October 13, 2009*

**social economics politics**

ok, i now see your previous responses.
*October 12, 2009*

**social economics politics**

What are the various methods of maintaining peace and unity in binational, multinational, and multiethnic states? What are the strengths and weaknesses of each method?
*October 12, 2009*

**social economics politics**

What are the various methods of maintaining peace and unity in binational, multinational, and multiethnic states? What are the strengths and weaknesses of each method?
*October 12, 2009*

**Chemistry - Urgent**

ahhh, I get it now. thanks a lot, I actually did learn how to do it now, believe it or not.
*October 11, 2009*

**Chemistry - Urgent**

Is there anyway you could work this one out for me and explain what you did? I would probably learn a lot better than all of this reasoning and proportions. It's greatly appreciated.
*October 11, 2009*

**Chemistry - Urgent**

Totally lost.
*October 11, 2009*

**Chemistry - Urgent**

Ok, I got that, but what do I do with the 3.16 ×10^23?
*October 11, 2009*

**Chemistry - Urgent**

Determine the mass of 3.16 ×1023 atoms Cl. Answer in units of g. How do you do this? Need to get it done really fast. Thanks for help.
*October 11, 2009*

**Chemistry**

thanks
*October 11, 2009*

**Chemistry**

so it would be 6.02 x 10^23 x 50? then whattt?
*October 11, 2009*

**social economics politics**

what are the various methods of maintaining peace and unity in binational, multinational, and multiethnic states? what are the strengths and weaknesses of each method?
*October 11, 2009*

**Science**

I can be three different states of matter, but not at the same time. I am necessary for life, but I can also destroy life. I can be under your feet, around your body, or over your haed. What am I?
*October 11, 2009*

**english**

Im a Danish student, and I've written this summary which I would like someone to correct. Thanks in advance! In the short story”Beyond the pale”, published in 1888, author Rudyard Kipling states via his narrator that one should stick to its caste. Trejago, who&#...
*October 8, 2009*

**math**

how do you write the math expression for the product of 82 and g
*October 6, 2009*

**Mathematics**

6/7 because 7/8 and 6/7
*October 4, 2009*

**science**

Nikki lives near the deepest ocean trench in the world.What country does she live in .
*October 4, 2009*

**science**

Name one land and ocean animal that migrate.
*October 4, 2009*

**Calculus**

plot it on a graph in your calculator. then see the number where the line continues to stay on for a y value. for example, lets say it will go up and down but when it hits x=4 the y value is 2 and every y value after that is 2, then the limit for infinity would be 2. also......
*September 30, 2009*

**science**

I can travel where are no molecules,but never through a brick.I can travel through space,but never around a corner.What am I?
*September 21, 2009*

**Anatomy and Physiology**

Hi, i have to right a research paper about the origins and history of a cancer. I do not know where to find this information. We can choose any type of cancer, but i do not know where to find this information(who first diagnosed it, when was it first diagnosed)
*September 16, 2009*

**science**

Scientist do experimental tests more than once so they can reduce the chance of errors. This is called conducting what?
*September 8, 2009*

**Reading**

In the story Alexander Who Used To Be Rich Last Sunday what did Nicky tell him to do with his dollar?
*September 7, 2009*

**algebra**

if x equals 0,1,2,3 and y = 5,10,15,20 what is the pattern written as an equation--please help can't figure out this one
*September 4, 2009*

**social studies**

why were european nation competing for land
*August 25, 2009*

**math**

Consider the set of northwestern states or provinces {Montana, Washington, Idaho, Oregon, Alaska, British Columbia, Alberta}. If a person chooses one element, show that in three yes or no questions, we can determine the element. Your Solution Hints œ I want you to ...
*August 8, 2009*

**Physics**

Resolve a displacement of 700 cm into two components along direction lines that lie on opposite sides of the displacement and each of which makes an angle of 30° with the displacement. 404 cm and 478 cm 404 cm each 383 cm and 415 cm 415 cm each
*July 14, 2009*

**math...number sequence**

i need help with this partter n 1,2,5,7,11 give me numbers that follow the parttern
*June 29, 2009*

**Physical Science**

?????????????
*May 22, 2009*

**Calculus**

Our teacher told us that the fourth partial sum approximates the sum of the sequence 7n/(n^3+1). The fourth partial sum is also the error of the sequence and our teacher asks us to find a number X such that the error is less than X.
*May 11, 2009*

**Calculus**

Find a number X such that the error is less than X (The error is 14593/2340 for the sequence, 7n/(n^3+1). How would you start to solve this problem?
*May 11, 2009*

**12th grade**

Are you sure you wrote the question correctly? I do not understand how g which is a function of x is written as a function of t, and especially with the dt.
*April 23, 2009*

**Physics**

A gun that is spring-loaded shoots an object horizontally. The initial height of the gun is h=5 cm and the object lands 20 cm away. What is the gun's muzzle velocity? Do i use something like v=sqr(k)/m*x. am getting something like 3.2, is this somewhat correct at all.
*April 14, 2009*

**Physics**

A 32-u oxygen molecule (O2) moving in the +x direction at 580 m/s collides with an oxygen atom (mass 16 u) moving at 870 m/s at 27 degrees to the x axis. The particles stick together to form an ozone molecule. Find the velocity of the ozone. Express your answer in terms of the...
*April 13, 2009*

**Physics**

A 150g fircracker is thrown at 66km/h . It explodes in the air into two pieces, with a 42g piece continuing ahead at 93km/h.How much energy is gained in the explosion by the two pieces. I know you use k=1/2mv^2 though, do you use m1v1+m2v2=(m1+m2)vf I am getting something like...
*April 13, 2009*

**Physics**

Object A crashes into object B. A is more massive than B. Which is a true statement? a. A experiences an impulse b. B experiences an impulse c. Both A and B experience an impulse of equal magnitude d. Both A and B experience an impulse, but the impulse on B is greater I say C.
*April 12, 2009*

**Physcis**

Two trucks approach at the same speed and undergo an inelastic collision. Their total momentum? a. becomes zero b. remains unchanged c. doubles d. I need to know the masses of the two cars I say B.
*April 12, 2009*

**Physics**

Two rollerbladers throw a frisbie back and forth on a frictionless surface. Which does not change? a. Momentum of an individual rollerblader b. Momentum of the frisbie c. Momentum of the system consisting of the frisbie and rollerbladers throwing the ball d. Momentum of the ...
*April 12, 2009*

**Calculus**

Find the force on a hollow dome that is 1000 feet in diameter, that is a mile below the surface. HOw large can the dome be expanded and not surpass 600 billion pounds. I know the height will be 500, and i think that the intergral is 5280 to 4780 int 64,000pih, I am not sure ...
*April 11, 2009*

**12th grade**

Area of the house to be painted = A Bill pains "B" area per hour John pains "J" area per hour So, A/B = 4 hours, and A/J = 7 hours => B = A/4 and J = a/7 B and J says how much area they can paint per hour. When both of them work together, assume it takes...
*April 9, 2009*

**Physics**

wHAT DO I DO WITH THESE VALUES THEN...
*April 7, 2009*

**Physics**

A 69 kg roller blader, is on a frictionless surface at rest, he then tosses a 4.0 kg rock that has a velocity given by v=3i+4jm/s, the axes are both in the horizontal plane. Find the x component and y component of the subsequent velocity of the roller blader? I think tis is a ...
*April 7, 2009*

**11th grade-Calculas**

dD/dt = A(2pi/365)*cos [(2pi/365)*(t-80)] =0 for maximum or minimum (2pi/365)*(t-80) = n*pi/2 when n=1 gives maximum , then (t-80) = 365/4, for minimum n = 3 and t-80 = 3*365/4 (3) = dD/dt = +2/60 (4) = dD/dt = -2/60
*April 5, 2009*

**5th grade math problem**

write each number in standard form thirtytwo million,tenthousand one
*March 30, 2009*

**CHEMISTRY**

thanks i didnt really get molarity either but my question is for molality.
*March 16, 2009*

**CHEMISTRY**

i dont really understand molality. I know that it is a big concept but could someone explain it a little. the question is how would you prepare a molality solution.
*March 16, 2009*

**history**

A. putting more money into circulation. The reason I know the answer is correct is because I just took a test and got that same exact question right!!! ;)
*February 22, 2009*

**Math**

If x is a natural number then,(x+5)/5=x+1
*February 20, 2009*