Friday

May 27, 2016
Total # Posts: 406

**chemistry**

A mixture of O2 and He is prepared for a scuba diver who is going to descend 200 ft below the ocean surface. At that depth, the diver breathes a gas mixture that has a total pressure of 7.00 atm. If the pressure of the O2 in the tank at 200 ft below the ocean surface is 1140 ...
*December 12, 2010*

**physics**

A rock stuck in the tread of a 57.0 cm diameter bicycle wheel has a tangential speed of 3.00 m/s. When the brakes are applied, the rock's tangential deceleration is 1.40 m/s^2. A) What is the magnitudes of the rock's angular acceleration at t=1.60 s? B) At what time is...
*November 26, 2010*

**physics**

can you explain how to find the acceleration at a point halfway out to the end?
*November 26, 2010*

**physics**

A laboratory centrifuge on earth makes n rpm and produces an acceleration of 3.20 g at its outer end. A) What is the acceleration (in g's, i.e., acceleration divided by g) at a point halfway out to the end? B) This centrifuge is now used in a space capsule on the planet ...
*November 26, 2010*

**physics**

36.1 is the answer i got its wrong though what could i have done wrong?
*November 23, 2010*

**physics**

A shotputter throws the shot with an initial speed of 16.0 m/s at a 36.0 angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.00 m above the ground
*November 23, 2010*

**physics**

A hunter aims directly at a target (on the same level) 85.0 m away. If the bullet leaves the gun at a speed of 188 m/s, by how much will it miss the target?
*November 23, 2010*

**physics**

A hunter aims directly at a target (on the same level) 85.0 m away. If the bullet leaves the gun at a speed of 188 m/s, by how much will it miss the target?
*November 23, 2010*

**physics**

A hunter aims directly at a target (on the same level) 85.0 away. If the bullet leaves the gun at a speed of 188 , by how much will it miss the target?
*November 23, 2010*

**physics**

You have probably seen films of astronauts floating weightless in orbiting satellites. People often get the idea that the astronauts are weightless because they are so far from the gravity of the earth. Let us see if that explanation is correct. Typically, such satellites ...
*November 8, 2010*

**physics**

A 56.0 ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.00 turns each second. The distance from one hand to the other is 1.5 . Biometric measurements indicate that each hand typically makes up about 1.25 of body weight. ...
*November 8, 2010*

**math**

i divided 2,250/281,250=0.008 idk if im doing it right??
*October 29, 2010*

**spanish**

a. a verlas
*October 29, 2010*

**Economics**

Can someone help me with this question..Pleaseeee!! Suppose a government moves to reduce a budget deficit. Using the long-run model of the economy developed in Chapter 3, graphically illustrate the impact of reducing a government's budget deficit by reducing government ...
*October 24, 2010*

**math**

how would you solve this 31=2*x+c+1
*October 19, 2010*

**MATH PLEASE HELP**

A certain molecule contains twice as many atoms of hydrogen as oxygen and one more atom of carbon than hydrogen. If there are 31 atoms altogether in the molecule. how many atoms of carbon are there?
*October 19, 2010*

**Chemistry**

Concentrated sulfuric acid used in the laboratory is 92% H2SO4 by mass. Calculate the mass of water in a 100 g solution of this acid in kg.
*October 18, 2010*

**maths**

v = ax pie squared find the sqaure root
*October 17, 2010*

**english**

from civil peace by chinua achebe ehy do the theives help the lwegbus shout for the poice? thats is ironic about what they say and do?
*October 14, 2010*

**organic chemistry**

a 50% aqueous solution of ethanol (50mL total) is distilled and collected in 10-mL fractions. Predict the boiling range of each fraction
*October 11, 2010*

**algebra**

7-5a-c+8a+2+3c+7d+a
*October 4, 2010*

**Organic Chem**

how would you make 300mL of toluene and hexane in a artion of 70:30 respectively? i dont un derstand please help
*September 28, 2010*

**WORLD GEOGRAPHY**

A LOW-LATITUDES AREA OF VERY LITTLE WIND IS KNOWN AS:
*September 22, 2010*

**Physics**

1.56
*September 13, 2010*

**Geography**

I need info on the five themes of geography. Not just two senteces about each theme but 350 words per theme.
*August 20, 2010*

**math**

Sam has a savings account that increased in value over a twelve month period from $8765.00 to $9006.04. He made no deposits or withdrawals in that time. What percent interest did he receive for the 12 month period?
*August 14, 2010*

**9th grade**

The answer is false. 100% false.
*August 6, 2010*

**math 9**

in a park some people are launching model rockets to find the maximum height,x,the rocket reaches, a person stands 50.0m from the launch sight and measure the angle from the ground to the rocket at its maximum height. if the angle is 36 then the maximum height,x, of rocket is...
*June 17, 2010*

**english**

i am writing a compare/contrast essay on love vs. infatuation and need a thesis statement. any thoughts?
*May 17, 2010*

**statistics**

u mean the z score
*May 2, 2010*

**Statistics**

you prolly multiplied wrong. 90 * .05 100*.15, 95*.15,90*.05,94.5*.60 then is should all equal out to 94.68
*May 2, 2010*

**Imagery**

I need help finding an image that illustrates LIFE. Any suggestions?
*March 12, 2010*

**Math please help**

How do i find the number of degrees in a point angle...for example {6/2}
*February 7, 2010*

**Math**

Two corresponding sides of similar polygons have the ratio 5:4. The perimeter of the smaller figure is 40, what is the perimeter of the larger figure...I need help trying to figure this out...and the steps!
*February 7, 2010*

**Algebra**

an algebra student won $115,000 in a lottery and wishing to deposit it in savings accounts in two financial institutions. One account pays 7.9% simple interest but only insures $60,000. The second account pays 6.9% simple interest and deposits are insured up to $100,000. ...
*February 1, 2010*

**algebra**

Simplifying radicals: -12 radical 24 over 3 radical 2?
*January 30, 2010*

**Physics**

Sorry about the lack of units...but your input helped me to solve it. I wasn't figuring the velocity correctly for the lower portion of the tube! Thanks so much!!
*January 30, 2010*

**Physics**

At one point in a pipeline, the water's speed is 3.00 and the gauge pressure is 4.00×104 . Find the gauge pressure at a second point in the line 11.0 lower than the first if the pipe diameter at the second point is twice that at the first. I've been trying to use...
*January 30, 2010*

**algebra**

Part 1: Using the Library, web resources, and/or other materials, find the logarithmic formula that gives the pH of a substance. State what each variable in your equation represents. Find the pH of an acidic substance of your choice. Using this pH, show how to find the ...
*December 8, 2009*

**Physics**

In the dangerous "sport" of bungee-jumping, a daring student jumps from a balloon with a specially designed elastic cord attached to his ankles, as shown in Figure P5.69. The unstretched length of the cord is 28.0 m, the student weighs 680 N, and the balloon is 36.0 ...
*October 12, 2009*

**physics**

A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 11 m/s. The cliff is h = 47 m above the water's surface, as shown below.
*September 27, 2009*

**english**

what is a direct and indirect support when writing an essay? what makes it direct or indirect?
*September 12, 2009*

**Pre-Calculus**

i got 3x^2-16x+16
*September 10, 2009*

**pre calc**

pleasse help!!! i don't need the answer just how to do it
*September 10, 2009*

**pre calc**

multiply and simplify (5w-radical 3x)^2 sorry my computer has no radical key!!
*September 10, 2009*

**math**

just divide 100 by .84. it comes out to be somewhere near 119
*September 10, 2009*

**economics**

why might a leader of a developing nation talk about scarcity and trade-offs?
*August 25, 2009*

**re -ms sue**

thanks but that does not really help very much.
*June 10, 2009*

**re**

i have similar homework to leigh about miracles. i need to give 3 reasons why miracles occur,this is what ive thought of:- .praying .believing in God .faith im still struggling to think of 3 reasons why miracles do not occur. thanks
*June 10, 2009*

**Statistics**

10, 12, 16, 17, 20 I'm having a problem figuring out how the answer is 64... how do I get that because I have to show my work Thanks for your help
*June 6, 2009*

**Math**

An automobile purchased for 24000 is worth 2100 after 8 years. Assuming that the car's value depriciated steadily from year to year, what was it worth at the end of the third year?
*February 3, 2009*

**International Business**

Most command economies are in the process of transition to a market economy. What is the meaning of transition, and also discuss the related factors that can make an economic transition more successful
*January 31, 2009*

**College level math**

Suppose you deposit $100 in an account that earns 0.5% each month. You make no withdrawals from the account and deposit no more money into the account. How much money will you have in the account after 4 years?
*January 24, 2009*

**Politics**

what is a lobbyist? what is a grassroot? annd my teacher said to "study the 6 types of interest groups" what does that mean?? what are the 6 types??
*December 7, 2008*

**English**

When do I use she and I and when do I use me and her?
*November 13, 2008*

**math**

thanks for #1 how did you get 2x2x.63?
*November 2, 2008*

**math**

1.A ball is dropped from a height of 2.0, to a floor. After each bounce, the ball rises to 63% of its previous height What is the total vertical distance the ball has travelled after 5 bounces? 2.An oil produces 25000 barrels of oil durign its first month of production. ...
*November 2, 2008*

**physics**

a 200kg sailboat experiences an eastward force of 3000N by the ocean tide and a wind force against its sails with magnitude of 6000N directed toward the northwest (45 degrees north of west). what is the magnitude of the resultant acceleration?
*October 23, 2008*

**College Physics!!!**

A truck on a straight road starts from rest accelerating at 2.0 m/s2 until it reaches a speed of 20 m/s. Then the truck travels for 20 s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.0 s. What is the average velocity ...
*October 6, 2008*

**Math**

The derivative of y= x2-3x at the point (0,0)is?
*July 25, 2008*

**Math**

If k(x)=x2-3x, the value of k(3+h)is?
*July 25, 2008*

**Math**

If f(x)= 2x-5, the value of f(4)is?
*July 25, 2008*

**CHEM**

The mass of an evacuated 255-mL flask is 143.187g. The mass of the flask filled with 267 torr of an unknown gas at 25 degrees Celsius is 143.289g. Calculate the molar mass of the unknown gas.
*July 22, 2008*

**physics class-Help!!!**

torque is radius X Force sin theta Torque 1 and 2 have angles of 90 degrees making it equal to 1. Torque 1:0.6 (radius of 1.2) X 6.0 N Torque 2:1.5 (radius of 3)X 5.2 N Torque 3:1.5 (radius of 3)X 5.2 N sine 30 degrees Torque 1 + Torque 2 + Torque 3 = Net Torque 3.6 + 7.8 + 3....
*July 16, 2008*

**physics class-Help!!!**

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 1.2 m from the pivot causing a ccw torque, and a force of 5.2 is applied at the end of the rod 3.0 m from the pivot. The 5.2 N is at an angle of 30 degrees to the ...
*July 16, 2008*

**math**

acute triangle
*May 30, 2008*

**music**

What was the davul drum used for
*May 18, 2008*

**SPSS**

Stock automobiles containing dummies in the driver seats crashed into a wall at 35 miles per hour. National Transportation Safety Board officials collected info on how the crash affected the dummies. One variable scored the extent of chest injuries sustained by the dummies (...
*May 13, 2008*

**statistics**

can someone please tell me what the equation is to find the sum of squares...im looking online but everything is sohard to understand and all the symbols are confusing...?? thank you!
*May 8, 2008*

**INS 205**

Imagine that you immigrated to a foreign county with a culture vastly different from yours. While the economic opportunity in the country is great, there is a strong push to assimilate into the new culture. What are the positive and negative aspects of assimilating into the ...
*December 14, 2007*

**world history**

Also, the Congo River.
*November 13, 2007*

**world history**

Describe the kingdom of kongo (the time/ place/ significance). Describe the economy.
*November 13, 2007*

**physics**

A bicycle is moving at 8.3 m/s. What is the angular speed of its tires if their radius is 42 cm?
*October 22, 2007*

**PHYSICS**

Jason is practicing his tennis stroke by hitting balls against a wall. The ball leaves his racquet at a height of 57 cm above the ground at an angle of 80° with respect to the vertical. (a) The speed of the ball as it leaves the racquet is 17 m/s and it must travel a ...
*October 16, 2007*

**PHYSICS**

A ball is thrown from a point 1.2 m above the ground. The initial velocity is 19.8 m/s at an angle of 34.0° above the horizontal. (a) Find the maximum height of the ball above the ground. (b) Calculate the speed of the ball at the highest point in the trajectory.
*October 16, 2007*

**Science (chem)**

how would you make 300mL of toluene and hexane in a artion of 70:30 respectively? i dont understand please help. thanks
*September 30, 2007*

**Physics**

Its a question on scalar and vector quantities - speed and velocity have different meanings - speed has no direction, velocity does, hence given no direction, it would be speed. it is instantaneous as average would be 60-0 / 8 = x, whereas the manufacturer is trying to show ...
*September 9, 2007*

**Journal Entry of a Subordinate Group Member**

Subordinate Groups: Native Americans, African Americans, Chinese Americans, Japanese Americans, Arab Americans, Filipino Americans, Korean Americans, Vietnamese Americans, Asian Indians, Hawaiians, Irish Americans, Polish Americans, Norwegian Americans, Jewish Americans, Cuban...
*August 26, 2007*

**math**

There were 3 times as many adults as students attending a school play. If the attendance was 480, how many adults and how many students attended the play? Let x equal the number of students attending the school play and solve this equation. 3x + x = 480
*August 9, 2007*

**math**

Find the distance between (–3, –2) and (1, 4). (1, 4) - (–3, –2) = (1- -3, 4 - -2) = (1+3, 4+2) = (4,6) |(4,6)| = sqrt[4^2 + 6^2] = sqrt[52] = 2 sqrt[13]
*July 8, 2007*

**Japanese**

okay....so in my Japanese class right now, we're currently writing our speeches.. So far, I've come up with: (This is actually in Japanese but I've chosen to write this in English as I'm on a school computer which only allows English characters!) "At first...
*May 24, 2007*

**Calculus HELP**

for the power seies n^4x^n/2(n-1)...find the radius and interval of convergence
*May 6, 2007*

**english please helppppppppppp**

Can some one explain this passage I do not understand it it is by hazlitt it is called "on the want of money" There are two classes of people that I have observed who are not so distinct as might be imagined - those who cannot keep their own money in their hands, and...
*April 17, 2007*

**english**

Can some one explain this passage I do not understand it it is by hazlitt it is called "on the want of money" There are two classes of people that I have observed who are not so distinct as might be imagined - those who cannot keep their own money in their hands, and...
*April 17, 2007*

**english**

can you help with this passage on hazlitt On the want of money There are two classes of people that I have observed who are not so distinct as might be imagined - those who cannot keep their own money in their hands, and those who cannot keep their hands from other people'...
*April 16, 2007*

**Algebra**

X+8 ____ x2 + 11x +24 see other post.
*April 10, 2007*

**Algebra**

X+8 ____ x2 + 11x +24 factor the denominator (x+8)(x+3) then reduce by dividing out the common fractions.
*April 10, 2007*

**math**

I am a positive integer less than 100. two more than my value is a multiple of 6. the sum of my digits is a multiple of 7. I must show all my work This kind of problem can't be solved by writing and solving one or two equations. You have to use "trial and error" ...
*March 22, 2007*

**physics**

A pendulum clock that works perfectly on Earth is taken to the Moon. (a)Does it run fast or slow there? (b) if the clock is started at 12:00:00 am, what will it read after one Earth day(24hrs)? Assume that the free-fall acceleration on the Moon is 1.63 m/s^2 I tried to do this...
*March 21, 2007*

**physics**

Given that x=Acos(wt) is a sinusoidal function of time, show that v(velocity) and a(acceleration) are also sinusoidal functions of time. (HINT: Use v=square root [(k/m)(A^2-x^2)] and a=(-k/m)X The hint tells you what to do: put Acoswt for X. A second way which is easier is in ...
*March 15, 2007*

**genetics (again)**

i asked this question...when subcloning a gene and inserting it into a vector you normally would use x-gal to locate transformants if x-gal is not available what are the alternatives...and thankyou for the alternatives but i was wondering if there was any other process that ...
*March 9, 2007*

**genetics**

when subcloning a gene and inserting it into a vector you normally would use x-gal to locate transformants if x-gal is not available what are the alternatives <<In addition to X-Gal, several alternative [3-gal sub- strates with different halide groups on the indolyl ...
*March 8, 2007*

**Chemistry**

Asprin, c9h804, is produced through the following reaction of salicyclic acid, c7h6o3, and acetic anhydride, c4h6o3. chemical equation: c7h6o3 + c4h6o3 yields c9h8o4 + hc2h3o2 (all numbers in this equation are subscripts) At 20 degrees Celsius. how many liters of acetic acid, ...
*January 21, 2007*

**Algebra**

the union of (a,b,c,d)and (14,15)
*January 7, 2007*

**Algebra**

v-6<35 add six to both sides. first you take the 6 and bring it over. so its v<35-6. Then you subtract them, giving you the answer v<29 add six to both sides.
*January 7, 2007*

**Algebra**

n+2>32 subtract 2 from both sides.
*January 7, 2007*

**Algebra**

12 - 5z/4 < 37 12-5z/4 < 37 Subtract 12 from each side. -5z/4 < 25 Mulitply each side by -4 to cancel out the negative and 4 in the denominator. Switch the inequality symbol because you are multiplying/dividing by a negative number. 5z > -100 Divide each side by 5...
*December 14, 2006*

**Algebra**

- 20> 8 +7a Solve inequalities like you would an equation, EXCEPT if you multiply or divide by a negative number, reverse the inequality sign. Let's look at your problem: - 20 > 8 + 7a First subtract 8 from both sides (whatever operation you do to one side you must ...
*December 14, 2006*

**Algebra**

3x - 1 > 14 3x-1>14 3x>14+1 3x>15 x>5
*December 14, 2006*

**MATH LOGIC AGAIN**

Hi can some one go back to my Math logic problem and possibly give me one more example? thanx :) I found a paper you may want your library to get for you: http://cat.inist.fr/?aModele=afficheN&cpsidt=13604737 It is probably in the local college library. I wish I had a copy. ...
*December 3, 2006*