Friday

August 22, 2014

August 22, 2014

Total # Posts: 939

**Chemistry 121**

How much oxygen would be needed to completely burn 250g of propane?
*November 3, 2011*

**Calculus**

A ship sailing parallel to shore sights a lighthouse at an angle of 12 degrees from its direction of travel. After traveling 5 miles farther, the angle is 22 degrees. At that time, how far is the ship from the lighthouse?
*October 23, 2011*

**chem**

Explain clearly why changes in base concentration do not affect the observed reaction rate of an E1 elimination.
*October 23, 2011*

**chemistry**

12 mL of 0.0100 M HCl are added to 25.0 mL of a buffer solution that is 0.010 M HC2H3O2 and 0.08 M C2H3O2-. What is the pH of the resulting solution?
*October 21, 2011*

**chemistry-acid/base extraction.**

I do not understand acid base extraction. why should we mix, for example, an organic and aqueous compound to then separate them from each other. please explain confused....
*October 21, 2011*

**Algebra**

Find the percent of error of each measurement. 0.2cm 0.4cm
*October 20, 2011*

**Algebra**

This is soooo confusing! An airplane flies from New Orleans, Louisiana, to Atlanta, Georgia, at an average rate of 320 miles per hour. The airplane then returns at an average rate of 280 miles per hour. The total travel time is 3 hours. A. Define a variable for the flying time...
*October 14, 2011*

**Algebra**

Yeah, I did it right! Thank you!!
*October 14, 2011*

**Geography**

Following the breakup of the Soviet Union, what are some of the major problems faced by many of the new countries? Thanks.
*October 13, 2011*

**buss/stats**

what is it called when all the items in the population have the same chance of being selected for the sample?
*October 8, 2011*

**question**

thank you very much
*October 5, 2011*

**question**

But critical writing like argumentative essays have structure. (can you tell me what is wrong with this message?)
*October 5, 2011*

**physics**

What quantity is given by the gradient of such a graph?
*October 2, 2011*

**Math**

Edit...25 balls in the bowl..
*October 1, 2011*

**Math**

There are 20 balls in a bowl. 7 black, 6 blue, 5 green, 4 red, and 3 yellow. Balls must be drawn until 4 different colors are drawn. What is the probability that one is black? Please walk me through if you can...
*October 1, 2011*

**Physics 9th grade**

no
*September 26, 2011*

**math**

On a board game if you landed on red you move ahead 1 space,land on blue you move ahead 2 spaces,and land on orange you move back 1 space. If you took 30 spins where would you expect to land relative to where you started?
*September 22, 2011*

**American Government **

In The Declaration of Independence how did they signify the colonists’ relationship to Britain?
*September 19, 2011*

**English**

what is John updike`s message in this paragraph? The next morning, I went back to the open vantage from which we had watched the tower so dreadfully slip from sight. The fresh sun shone on the eastward façades, a few boats tentatively moved in the river, the ruins were ...
*September 13, 2011*

**physics**

a stone tied at one end of a string of length,l is whirled in a horizontal circle with constant linear speed,v.which of the following expressions describe the relation between the radius of the circle,r and the angle between the string and the vertical axis?
*September 11, 2011*

**social studies**

Although the Chesapeake and New England colonies differed in many ways, relations with Native Americans followed a similar course in both regions. Why? What were the biggest factors in relations between the two sides? Did relations change over time and why?
*September 10, 2011*

**social studies**

in what ways?
*September 10, 2011*

**social studies**

In what ways did English settlement patterns differ according to region and environmental factors?
*September 10, 2011*

**Psychology**

Can anyone explain to me what they are trying to ask in this question. What is the difference between the Sympathetic Nervous System response and the HPA Axis in terms of both process and function?
*September 8, 2011*

**buss/stats**

Sorry the full question is A loaf of bread is normally distributed with a mean of22 oz. and a standard deviation of 0.5 oz. a, what is the probability that a loaf is btwn 22.75and 23.00? B, 5% of the loafs will weigh less than_____ ounces? C, assuming 200 loaves are baked on a...
*September 6, 2011*

**bussi./stats**

what is the probability that a loaf of bread is between 22.75 and 23.00?
*September 6, 2011*

**Math**

Write the rectangular equation in polar form. (x – 4)2 + y2 = 16
*September 5, 2011*

**PreCal**

Thanks, I am understanding now.
*September 5, 2011*

**bus/stats**

a sample of the personal files of eight male employees revealed that, during a six-month period, they lost the following number of days due to illness: 2,0,6,3,10,4,1 and 2. Calculate the standard deviation of the above sample? the means deviation is 2.375? but not sure how to...
*September 3, 2011*

**MATHS**

Four points lie in a plane. They are partitioned into two pairs so that the sum of the lengths of the segments joining the points of each pair has the minimal possible value. Prove that these segments have no common points.
*September 3, 2011*

**bus. /stats**

Use the data given in the table to construct a frequency distribution and ogive? Before constructing a dam on a Hill river, the Army corps of engineers performed a series of tests to measure the water flow past the proposed location of the dam. The results of the testing were ...
*September 3, 2011*

**buss./stats**

a sample of the personal files of eight male employees revealed that during a six month period they lost the following number of days due to illness 2, 0, 6, 3, 10, 4, 1, 2 calculate the standard deviation show your work
*September 2, 2011*

**business and stats**

What type of data is the projected return on an investment? Qualitative , continous, attribute,discrete or none of the above
*August 31, 2011*

**Communication**

For the following, state the value of the discriminant and then describe the nature of the sloution. -3x^2-8x-19=0
*August 2, 2011*

**English**

I need to check my work on diagramming this question. How many players are on a team? I think it should be as follows: How (adverb) many (adjective) players (direct object) are (past tense verb) on (proposition) a (definite article) team (subject of proposition)? Does this ...
*August 1, 2011*

**College algebra**

Solve. V^2-6v-16=0
*July 31, 2011*

**Algebra**

How do i simplify 3n^2+3n/6n^2+9 by removing factors of 1
*July 29, 2011*

**algebra**

10 cm^3 of a normal specimen of human blood contains 1.2 g of hemoglobin. How many grams does 17 cm^3 of the same blood contain?
*July 15, 2011*

**Math**

A firecracker is launched straight up, and its height is a function of time, h(t)= -14^2 + 112t, where h is the height in feet and t is the time in seconds with t=0 corresponding to the instant it launches. What is the height 5 seconds after launch? What is the domain of this ...
*July 8, 2011*

**chem**

What pressure (atm) is exerted by a column of ethanol 86.0 cm high. The density of ethanol is 0.789 g/cm3 and 9.8 m/s2 as your gravitational constant.
*July 6, 2011*

**PHY**

A traveling wave is produced on a rope. The wave travels until it hits a wall and it is reflected. If the speed of the wave is 1.8 m/s and it takes 3.3 s to get back to the starting point, how long (m) is the rope.
*July 5, 2011*

**chem**

The average distance between planet X and Earth is about 1.5 x 10^8 miles. How long (minutes would it take pictures transmitted from a space vehicle on Planet X's surface to reach Earth?
*July 2, 2011*

**chem**

At 36.4°C a sample of ammonia gas exerts a pressure of 6.8 atm. What is the pressure when the volume of the gas is reduced to one-fourth of the original value at the same temperature
*June 29, 2011*

**mirco-economics**

yes
*June 25, 2011*

**mirco-economics**

Help In the first case (Total Fixed Cost equal one million: Total variable cost equal $ 4.4M ($ 4M for wages (fifty thousand workers time eighty dollars per worker) plus four hundred thousand other variable inputs. Average variable cost equal twenty two dollars (Total variable...
*June 25, 2011*

**math**

is the pair of lines parallel x+2y=7 and 2x+4y=3
*June 16, 2011*

**physics**

A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever? What is the ideal mechanical advantage of the lever? What is ...
*June 8, 2011*

**physics**

3. A man lifts various loads with the same lever. The distance of the applied force from the fulcrum is 1.00 m, and the distance from the fulcrum to the load is 0.250 m. What is the mechanical advantage of the lever? What is the ideal mechanical advantage of the lever? What is...
*June 8, 2011*

**Math**

How do i graph the function y^2=x*(x-4)^2. I have no idea where to begin.
*May 31, 2011*

**human resource management**

1. Critically evaluate the job analysis that Mary conducted for the position of assistant manager. Has she used appropriate methods? What are the strengths and weaknesses of her efforts? 2. What kind of factors about Today's Fashion and its operations should Mary have ...
*May 25, 2011*

**math**

fractions equivalent to 18/24
*May 15, 2011*

**math**

Wats 12yds 2ft + 5yds 2ft
*May 2, 2011*

**physics**

in terms of ph,explain what would if you happen if you if you mixed vinegar with a solution of ammonia what type of products would form
*May 2, 2011*

**math**

if all nos in the equation y/y+101 = 11in base 2, solve for y
*April 27, 2011*

**Compound math**

P*(1+i)* Exponent which is time invested $8000x(1+.o62)30 $8000 x ((1 + .062)^30) = $48,621.1794 U.S. dollars
*April 19, 2011*

**physics**

What mass (in grams) of steam at 100°C must be mixed with 341 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 57.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg, and the latent ...
*April 15, 2011*

**physics**

The average rate at which energy is conducted outward through the ground surface in a certain region is 51.6 mW/m2, and the average thermal conductivity of the near-surface rocks is 3.31 W/m·K. Assuming a surface temperature of 11.7°C, find the temperature (in ...
*April 14, 2011*

**math**

thanks! i really appreciate this :)
*April 10, 2011*

**math**

simplify: 1. a^2b^-3 2. (5/3)^-3 3. (a^2b^0c)^0 4. x^-2y^3 5. 3x^-2 6. n^2/n^-3 please help!!
*April 10, 2011*

**Tech401**

How the internet policies of some countries may affect a company's ability to expand globally?
*April 9, 2011*

**mathematics**

area is length x width so what times what equals 25? 5
*April 7, 2011*

**chemistry**

what is the concentration, in % m/m of a solution prepared from 50.0g sodium chloride and 150.0g of water
*April 5, 2011*

**Math**

How would I solve this...I don't get it. Two solutions of an equation are (6,5) and (8,5). What could the equation be?
*April 3, 2011*

**phyiscs**

Two persons watch the same object move john says that it accelerate straight downward, but Samantha claims that it falls Along curved path.describe the conditions under which each person would be reporting correctly what they see. Thanks and please please please answer this ...
*April 1, 2011*

**physics urgent**

yes mr.pursley
*April 1, 2011*

**physics urgent**

an airplane is flying horizontally over ocean at the speed of 200 meters/seconds and at the altiude of 2000 meters.the pilot drops a flare. A. how many second after release does the flare hit the water? b.At what distance from point p,directly under point of release does the ...
*April 1, 2011*

**chemistry**

when 52 moles of benzene combine with oxgen, how many moles of carbon dioxide are produced? what else is produced in addtion to the carbon dioxide
*March 31, 2011*

**4th grade math**

Name the top view, front view, side view of a cone
*March 28, 2011*

**statistics**

an average of 0.56 defects per 500 yards. Using the Poisson formula, find the probability that the number of defects in a given 500-yard piece of this fabric will be more than 3
*March 22, 2011*

**early childhood ed**

a childs observation of a parent writing a grocery list, his recognition of the coca cola logo, and his leafing through mailbox advertising literature exemplify. answers 1. cultural imprints 2. autonomous language 3. literacy events 4. mastery of decontexualized language my ...
*March 20, 2011*

**geometry**

The perimeter of a kite is 24 I'm tring to find the the sides the kite 4cm less than 3 times the length of another
*March 17, 2011*

**Algebra**

Find the polynomial function P of the lowest possible degree, having real coefficients, with the given zeros. 3+2i, -2 and 1
*March 10, 2011*

**Liberal Arts Math**

what is k(p)= (p+3)(p-7)
*March 9, 2011*

**Chemistry**

What is the molarity of CuCl2 solution that completely reacts with 10.0g of zinc , if the volume of the solution is 360mls? Zn(s) + CuCl2(aq) ¨ ZnCl2(aq) + Cu(s) A. 0.42 B. 0.00021 C. 0.21 D. none of these
*March 5, 2011*

**statistics**

Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that of two items sold during a given hour by this company both will be returned for a refund
*February 28, 2011*

**statistics**

Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that of two items sold during a given hour by this company both will be returned for a refund
*February 28, 2011*

**statistics**

an average of 0.56 defects per 500 yards. Using the Poisson formula, find the probability that the number of defects in a given 500-yard piece of this fabric will be more than 3
*February 28, 2011*

**statistics**

Five percent of all items sold by a mail-order company are returned by customers for a refund. Find the probability that of two items sold during a given hour by this company both will be returned for a refund
*February 28, 2011*

**math**

The altitude of a triangle is increasing at a rate of 3 centimeters/minute while the area of the triangle is increasing at a rate of 7 square centimeters/minute. At what rate is the base of the triangle changing when the altitude is 22 centimeters and the area is 66 square ...
*February 23, 2011*

**social studies**

how did the spanish differ from the portugese in searching for a route to asia
*February 17, 2011*

**THE AGE OF DISCOVERY TO THE AMERICAN EXPERIMENT**

its ur ass
*February 16, 2011*

**math**

how much force is need to split a 20" x 20" green hedge log?
*February 15, 2011*

**english**

Write one paragraph of at least 200-words explaining what the student could have done differently to avoid the plagiarism concerns raised by the faculty member. How could the use of Plagiarism Checker have helped the student?
*February 15, 2011*

**psychology**

what is the design, purpose and the limits of an I.Q test?
*February 13, 2011*

**Physics**

A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?
*January 31, 2011*

**Physics**

A car drove a total 5km. Accelerated 10seconds then had a constant velocity. Entire trip was 45 seconds. Was was the initial acceleration and final velocity?
*January 31, 2011*

**Algebra**

A model train is made by connecting cars with possible lengths of 2 inches and 5 inches. what is the number of inches in the greatest impossible whole-number length of such a train?
*January 22, 2011*

**chemistry**

how much lithium hydroxide will be needed to remove 75.0 grams of carbon dioxide?
*January 21, 2011*

**algebra**

Sam has $50 in the bank. He deposits $5 each week and does not withdraw any money. How much will he have in his account in w weeks?
*January 18, 2011*

**Chemistry**

Mass of flask = 81.39g Mass of flask and water = 104.26g Mass of flask ,water,and solute =129.53 Mass of solute= 25.27g Boiling point of water =98.7C Boiling point of solution =109.5C Calculate the molecular weight of the solute using the data. M=Kb*r solute/delta Tb*kg ...
*January 10, 2011*

**algebra**

y+x=-9
*January 4, 2011*

**algebra**

slope x=-6
*January 4, 2011*

**algebra**

6+9x<42
*January 4, 2011*

**algebra**

solve -10<=3x-5<=-4
*January 4, 2011*

**economics PLEASE HELP**

According to the permanent income hypothesis, households will tend to react to a temporary tax cut by
*December 20, 2010*

**geometry**

Triangle ABC is an isosceles triangle, where angle B is the vertex angle. If BC = 10x-4 , AC= 2x+18 , and AB= 6x+32, find the value of x.
*December 15, 2010*

**calc**

construct an isoceles triangle with an area of 100. what is the length of the base of the triangle which has the smallest perimeter? Prepping for a test, explanations please
*December 9, 2010*

**physics**

A convex mirror with a radius of curvature of 10 cm (C=10 cm) produces a virtual image 1/3 the size of the real object. What is the object's distance?
*December 3, 2010*

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