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September 20, 2014

September 20, 2014

Post a New Question | Current Questions

**College Chemistry**

How many grams of steam and iron must react to produce 375g of magnetic iron oxide, Fe3So4
*Friday, July 13, 2012 at 4:34pm*

**College Math**

In West Virginia, 100 days of the year (365)have temperatures less than32 degrees Fahrenheir. What (reduced) fraction of the days is that? I'm not sure how to go about finding the answer. Can you please help?
*Friday, July 13, 2012 at 4:04pm*

**statistic**

1.The state highway patrol stops every 5th car on highway 210 to check drivers' licenses and registrations. Which sampling technique are they using? systematic sampling -chose this one convenience sampling cluster sampling simple random sampling stratified sampling 2.You ...
*Friday, July 13, 2012 at 6:56am*

**College Chemistry**

given the concentration of 125.0mg/L of Fe(2+)in the stock solution and the volume used which is (1.00mL) how do i calculate the concentration of iron(II) ions in mg/L? i pipet 1.00mL of the stock into a 250ml volumetric flask!
*Thursday, July 12, 2012 at 9:51pm*

**college chemistry**

When ethane reacts with oxygen to form carbon dioxide and water. When 10 molecules of ethane react with 20 molecules of oxygen, what is the composition of the FINAL mixture?
*Thursday, July 12, 2012 at 3:29pm*

**History**

2. The 1978 Supreme Court decision in Bakke v. Regents of the University of California A. established the rights of students to appeal college admissions policies. B. established the "red state-blue state" divide. C. ruled in favor of...
*Thursday, July 12, 2012 at 1:45pm*

**Statistics**

An instructor for a college biology lab has each of her 12 students (you are one of those 12 students) take their own SRS of 25 plants from an experimental field. She lets you know that the heights (measured in cm) of the plants in the field follow a N(50,4) distribution. a. ...
*Wednesday, July 11, 2012 at 10:03pm*

**statistics**

a random sample of 80 college students was selected to participate in a experiment. the mean of the sample is 317 points, the standard deviation of 37 there are 310 students that didn't complete the experiment 1. compute the appropriate test statistic? 2. what is the ...
*Wednesday, July 11, 2012 at 2:40pm*

**college algebra**

Find the height of the aircraft if the atmospheric pressure is 197 millimeters of mercury
*Tuesday, July 10, 2012 at 10:10pm*

**College Algebra**

Add: (6x)/(5z^(2))+(2y)/(xz)+(z)/(xy^(2))
*Tuesday, July 10, 2012 at 2:12pm*

**College Algebra**

Hooke's Law states that the distance a spring stretches is directly proportional to the weight attached to the spring. If a 30-pound weight attached to the spring stretches the spring 8 inches, find how much weight is needed to stretch the spring 12 inches.
*Tuesday, July 10, 2012 at 2:09pm*

**College Math**

Write the mixed number as an imprper fraction. 7 1/9 = A. 64/9 b. 22/3 c. 7/1 d. 65/9 I think the answer is A.
*Monday, July 9, 2012 at 11:21am*

**College Chemistry**

give the balanced equation for oxidation of iron(II)ion by permanganate and find how many millimoles of permanganate ion react with one millimole of ammonium iron(II) sulphate. I have the balanced equation: MnO4+8H+5Fe^(2+) --> Mn+4H2O+5Fe^(3+) what would be my next step?
*Monday, July 9, 2012 at 1:44am*

**College Physics**

An electron is released from rest at a perpendicular distance of 9.1 cm from a line of charge on a very long nonconducting rod. That charge is uniformly distributed, with 7.8 ìC per meter. What is the magnitude of the electron's initial acceleration?
*Sunday, July 8, 2012 at 9:44pm*

**College Physics**

A uniformly charged conducting sphere of 1.3 m diameter has a surface charge density of 8.7 µC/m2. (a) Find the net charge in coulombs on the sphere. (b) What is the total electric flux leaving the surface of the sphere?
*Sunday, July 8, 2012 at 9:43pm*

**College Physics**

A point charge of 2.0 µC is at the center of a cubical Gaussian surface 60 cm on edge. What is the net electric flux through the surface?
*Sunday, July 8, 2012 at 9:42pm*

**College Physics**

A square surface measures 4.4 mm on each side. It is immersed in a uniform electric field with magnitude E = 2100 N/C and with field lines at an angle of 35° with a normal to the surface. Take that normal to be "outward," as though the surface were one face of a ...
*Sunday, July 8, 2012 at 9:42pm*

**College Physics**

particle 1 of charge q1 = 5.80 pC and particle 2 of charge q2 = –6.90 pC are fixed at a distance d = 1.80 cm apart. In unit-vector notation, what is the net electric field at points (a)A [to the left of q1], (b)B [between q1 and q2], and (c)C [to the right of q2]?
*Sunday, July 8, 2012 at 9:39pm*

**College Physics**

A charged cloud system produces an electric field in the air near Earth's surface. A particle of charge -2.1 x 10-9 C is acted on by a downward electrostatic force of 4.3 x 10-6 N when placed in this field. (a) What is the magnitude of the electric field? (b) What is the ...
*Sunday, July 8, 2012 at 9:37pm*

**College Physics**

In Millikan's experiment, an oil drop of radius 1.75 ƒÊm and density 0.882 g/cm3 is suspended in chamber C (Fig. 22-14) when a downward electric field of 1.35 ~ 105 N/C is applied. Find the charge on the drop, in terms of e.
*Sunday, July 8, 2012 at 9:36pm*

**College Physics**

Two particles are fixed to an x axis: particle 1 of charge q1 = 2.22 x 10-8 C at x = 15.6 cm and particle 2 of charge q2 = -4.33q1 at x = 66.7 cm. At what coordinate on the x axis is the electric field produced by the particles equal to zero?
*Sunday, July 8, 2012 at 9:34pm*

**College Physics**

two charged particles are located on an x axis: -q = -4.80 × 10-19 C at x = -3.00 m and q = 4.80 × 10-19 C at x = 3.00 m. What are the (a)x- and (b)y- components of the net electric field produced at point P at y = 5.00 m?
*Sunday, July 8, 2012 at 9:30pm*

**College Physics**

Two particles are fixed to an x axis: particle 1 of charge -7.93 x 10-7 C is at the origin and particle 2 of charge +7.93 x 10-7 C is at x = 14.6 cm. Midway between the particles, what is the magnitude of the net electric field?
*Sunday, July 8, 2012 at 9:28pm*

**College Physics**

In an electric field, the lines on the left have twice the separation as those on the right. (a) If the magnitude of the field at A (particle in the field with lesser separated lines) is 58 N/C, what is the magnitude of the force on a proton at A? (b) What is the magnitude of ...
*Sunday, July 8, 2012 at 9:27pm*

**College Business Statistic**

One operation of a mill is to cut pieces of steel into parts that will later be used as the frame for front seats in an automobile. The steel is cut with a diamond saw and requires the resulting parts to be within ±0.005 inch of the length specified by the automobile ...
*Saturday, July 7, 2012 at 4:13pm*

**College Physics**

four particles are fixed along an x axis, separated by distances d = 2.70 cm. The charges are q1 = +3e, q2 = -e, q3 = +e, and q4 = +6e, with e = 1.60 × 10-19 C. What is the value of the net electrostatic force on (a) particle 1 and (b) particle 2 due to the other ...
*Friday, July 6, 2012 at 10:41pm*

**College Physics**

The magnitude of the electrostatic force between two identical ions that are separated by a distance of 7.8 × 10-10 m is 97.10 × 10-9 N. (a) What is the charge (in Coulombs) of each ion? (b) How many electrons are “missing” from each ion (thus giving the ...
*Friday, July 6, 2012 at 10:40pm*

**College Physics**

Two tiny, spherical water drops, with identical charges of -7.10 x 10-16 C, have a center-to-center separation of 1.23 cm. (a) What is the magnitude of the electrostatic force acting between them? (b) How many excess electrons are on each drop, giving it its charge imbalance?
*Friday, July 6, 2012 at 10:39pm*

**College Physics**

particle 1 of charge q1 = 1.04 ìC and particle 2 of charge q2 = -2.99 ìC, are held at separation L = 10.8 cm on an x axis. If particle 3 of unknown charge q3 is to be located such that the net electrostatic force on it from particles 1 and 2 is zero, what must be...
*Friday, July 6, 2012 at 10:38pm*

**College Physics**

In Fig. 21-24, the particles have charges q1 = -q2 = 400 nC and q3 = -q4 = 92 nC, and distance a = 5.0 cm. What are the (a) x and (b) y components of the net electrostatic force on particle 3? The figure cannot be uploaded, but the particles are located as a square, with q1 in...
*Friday, July 6, 2012 at 10:37pm*

**College Physics**

Two equally charged particles, held 2.8 x 10-3 m apart, are released from rest. The initial acceleration of the first particle is observed to be 6.8 m/s2 and that of the second to be 6.8 m/s2. If the mass of the first particle is 5.3 x 10-7 kg, what are (a) the mass of the ...
*Friday, July 6, 2012 at 10:35pm*

**College Physics**

What must be the distance in meters between point charge q1 = 25.6 µC and point charge q2 = -69.6 µC for the electrostatic force between them to have a magnitude of 8.50 N?
*Friday, July 6, 2012 at 10:34pm*

**College Physics**

A wheel of radius 0.398 m is mounted on a frictionless horizontal axis. The rotational inertia of the wheel about the axis is 0.0576 kg·m2. A massless cord wrapped around the wheel is attached to a 0.790 kg block that slides on a horizontal frictionless surface. If a ...
*Friday, July 6, 2012 at 10:29pm*

**Just a question**

Does community college re-teach you, what you forgot in highschool? Ive been out of highschool for YEARS and forget everything ive learned. Will the college re-teach me?
*Friday, July 6, 2012 at 7:26pm*

**statistics**

Steven collected data from 20 college students on their emotional responses to classical music. Students listened to two 30-second segments from “The Collection from the Best of Classical Music.” After listening to a segment, the students rated it on a scale from 1 ...
*Friday, July 6, 2012 at 6:37pm*

**Economics**

1) In which of the following situations would someone have to pay a gift tax? A. A relative dies and leaves you $13,000 in the will. B. Your cousin gives you a car worth $1,700. C. Your grandmother gives you $13,000 toward college. <<--- 2)Which of the following has ...
*Friday, July 6, 2012 at 5:02pm*

**math 098**

I made 3 f's on my tests in math 098, do you think i need to withdraw and take math 090 instead. this is my first semester and i really want to do my best please help. math 098 is algebra math 090 is basic for college. the score were equations--52,distance problems---55, ...
*Friday, July 6, 2012 at 7:09am*

**info lit**

please check my work? Scholarly journal articles are written: A. By experts in a subject field B. By lower division college students C. For a general audience D. By reporters my answer is: A
*Wednesday, July 4, 2012 at 4:00am*

**College Physics**

A convergent lens forms a real image 2.41 times the size of the object. The distancebetween object and image is 62.6 cm.Find the distance of the focal point fromthe center of the lens.Answer in units of cm
*Tuesday, July 3, 2012 at 3:36pm*

**research tech**

which of the following is a primary source a. a newspaper article published in the 1980's that reports on an event in the 1880's c.a recently published history book that cites diaries and letters from the 1880's d.diaries and letters from the 1880's published ...
*Monday, July 2, 2012 at 11:00pm*

**College Physics**

A person who is properly constrained by an over-the shoulder seat belt has a good chance of surviving a car collision if the deceleration does not exceed about 30 "g"s (1.0 g= 9.8m/s^2) Assumind uniform deceleration of this calue calculate the distance over which the...
*Monday, July 2, 2012 at 10:32pm*

**math**

A trangular region of a community college parking lot was measured. The measure of thefirst angle of this triangle is double the measure of the second angle. the measure of the third angleis 131 greater than double the measure of the first angle. what are the measurements of ...
*Monday, July 2, 2012 at 7:46pm*

**Math**

. Jacksonville Technical College received $3,445,553 in state aid on September 15 for the fall academic semester. The vice-president for finance decided to invest $2,000,000 in a 2-month investment that pays 11.5% simple interest. How much interest will the college earn on the...
*Sunday, July 1, 2012 at 12:47pm*

**introduction to university studies**

how might you use mnemonics in college students and adult learners?
*Saturday, June 30, 2012 at 1:54am*

**psychology**

Hello, I have to do a method section for a paper and need to know what I would put down for measurement and procedure section. like an example its on 500 college women and 500 college men participating in a study. thanks
*Thursday, June 28, 2012 at 11:49pm*

**Math Economics**

1. Jacksonville Technical College received $3,445,553 in state aid on September 15 for the fall academic semester. The vice-president for finance decided to invest $2,000,000 in a 2-month investment that pays 11.5% simple interest. How much interest will the college earn on ...
*Wednesday, June 27, 2012 at 7:29pm*

**Physics **

A block of mass 20g sits at rest on a plate that is at the top of the fluid on one side of a u-tube as shown in figure P10.38. The u tube contains two different fluids with densities p1= 1000 kg/m^3 and p2= 600 kg/m^3 and has a cross sectional area of A= 5.0 x10^-4 m^2. If the...
*Wednesday, June 27, 2012 at 4:18pm*

**college algebra**

simplify. express answer with positive exponents only. (-2x^-5y^4z^2)-3
*Wednesday, June 27, 2012 at 12:20pm*

**college chem**

How do i write the overall reaction equation for the synthesis of aluminum potassium sulphate dodecahydrate
*Tuesday, June 26, 2012 at 1:36am*

**College Chemistry**

What are the concentrations of Pb2+ and Cu2+ when the cell potential falls to 0.370 V? Given: A voltaic cell consists of a Pb/Pb2+ half-cell and a Cu/Cu2+ half-cell at 25degrees C . The initial concentrations of Pb2+ and Cu2+ are 5.30×10−2 M and 1.60 M, ...
*Saturday, June 23, 2012 at 2:45pm*

**College algebra**

A cyclist bikes at a constant speed for 18 miles. He then returns home at the same speed, but takes a different route. His return trip takes one hour longer and is 23 miles. Find his speed
*Friday, June 22, 2012 at 10:54am*

**Math**

A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.
*Thursday, June 21, 2012 at 3:15am*

**Math**

A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.
*Thursday, June 21, 2012 at 3:13am*

**physical Edu**

7. HIV infection is not a significant risk for college students. False right?
*Wednesday, June 20, 2012 at 5:30pm*

**college math**

Find the value of the expression 99 x 4/9 -(5=4)
*Tuesday, June 19, 2012 at 11:33pm*

**college math**

Ms. Sue will the correct answer be 0.16 for the percent decrease. this question electric bill $80.77 -$69.06 = $11.71
*Tuesday, June 19, 2012 at 11:28pm*

**college math**

Solve 7=m/5 the correct answer be m=35
*Tuesday, June 19, 2012 at 11:01pm*

**college math**

Last month Bill's electric bill was $80.77. This month it is $69.06. what is the percent decrease? $80.77 - $69.06 = $11.71 , I don't understand multiply decimal by 100 to get the decrease
*Tuesday, June 19, 2012 at 10:58pm*

**college math**

Last month Bill's electric bill was $80.77. this month Bill's bill was $69.06. What is the percent decrease?
*Tuesday, June 19, 2012 at 10:44pm*

**college math**

Carl weighs 4 times more than his daughter. If Carl weighs 204 pounds how much does his daughter weigh? would the correct answer be 51 pounds
*Tuesday, June 19, 2012 at 10:42pm*

**college math**

Solve 3-x=12(x-1) would the correct answer be x=15/13
*Tuesday, June 19, 2012 at 10:19pm*

**college math**

Rebekah's recipe for 4 1/2 dozen cookies calls for 6 cups of sugar. how many cups of sugar are needed to make 8 dozen cookies? would the correct answer be 11 2/3 cups
*Tuesday, June 19, 2012 at 10:06pm*

**college math**

the speed limit on a local highway is 65 miles per hour. what is this speed in km/hr
*Tuesday, June 19, 2012 at 9:43pm*

**College**

Another term that means the same thing as "insurance company" is:
*Tuesday, June 19, 2012 at 1:14pm*

**Statistics**

An organization is studying whether women have caught up to men in starting pay after attending college. They randomly sampled 28 women, who earned an average of $38,293.78 out of college with a standard deviation of $5,170.22. Twenty-four men were also randomly sampled, and ...
*Monday, June 18, 2012 at 10:55pm*

**College Essay**

One seemingly normal day in junior year, my friend and I were taking a train together home from school. We were on an extremely crowded F train headed for Queens. Packed against the door that separated one train car from another, overly warm and squished with no pole nearby to...
*Monday, June 18, 2012 at 5:31pm*

**College Math**

What is number of representatives in MS and what is the ratio of citizens to representatives?
*Saturday, June 16, 2012 at 2:32pm*

**College physics**

A skier traveling at 30.9 m/s encounters a 21.5 degree slope. If you could ignore friction, to the nearest meter, how far up the hill does he go?
*Saturday, June 16, 2012 at 1:50pm*

**College Algebra**

Tina invested $30,000 in a stock. In the first year, the stock increased in value by 10%. In the second year, the stock decreased in value by 20%. What percentage gain is requird in the third year for Tina's stock to return to its original value?
*Friday, June 15, 2012 at 9:46pm*

**college statistics**

assume the population of heights of female college students mean of 64.37 inches standard deviation of 6,26 in and random sample of 74 find p(x>65.25)B. find p(x>65.25)c. why is formulas required to solve a different than c.
*Thursday, June 14, 2012 at 6:57pm*

**COLLEGE ALGEBRA**

a board is 15 5/8 in. long . If it must be divided into three pieces of equal length , how long must each piece be ?
*Thursday, June 14, 2012 at 9:26am*

**algebra**

A student has a number of $40 and $ 80 savings bonds to use for part otf their college expence.The total value of bonds is $1160.There are 5 more $40 bonds than $80 bonds.How many of each type of bonds she have?
*Thursday, June 14, 2012 at 12:01am*

**College Algebra**

Find the sum of two numbers is 2, and their difference is 26. Find the numbers
*Wednesday, June 13, 2012 at 11:43am*

**College Algebra**

solve each system by substitution method x=y+3 3x-2y=4 Pls determine whether the equations are independent, dependent, or inconsistent
*Wednesday, June 13, 2012 at 11:39am*

**College**

If the line passing through point (a,1) and (8,7) is parallel to the line passing through the points (4,9) and (a+2,1) what is the value of a?
*Tuesday, June 12, 2012 at 9:06pm*

**College Chemistry**

The initial concentration for the compounds involved in the reaction shown were determined to be [CH4(g)] = 0.6616 mol/L, [H2O(g)] = 0.8127 mol/L, [CO(g)] = 0.9566 mol/L, [H2(g)] = 0.7688 mol/L. Calculate the value of the equilibrium constant (Kc) at 1200 K if the equilibrium ...
*Tuesday, June 12, 2012 at 1:03am*

**college ststistics**

given x is a noramlly distributed random variable with a mean of 28 and a sd of 7 find p(x<28)
*Monday, June 11, 2012 at 4:44pm*

**ALGEBRA**

Consider the following apportionment problem for College Town. Suppose each council member is to represent approximately 2,500 citizens. Use the apportionment plan requested in the problem, assuming there must be 10 representatives. North: 5,500 2.2 South: 9,000 3.6 East: 6,...
*Sunday, June 10, 2012 at 9:09pm*

**ALGEBRA**

Consider the following apportionment problem for College Town. Suppose each council member is to represent approximately 2,500 citizens. Use the apportionment plan requested in the problem, assuming there must be 10 representatives. North: 5,500 South: 9,000 East: 6,400 West: ...
*Sunday, June 10, 2012 at 8:47pm*

**college math**

would this answer be correct with fraction reduced 6/7a - 4/3b is this finally correct sue
*Saturday, June 9, 2012 at 9:04pm*

**college math**

original question 11/14a - 1/15b + 1/14a - 11/15b is this answer correct 12/14a + 12/15b
*Saturday, June 9, 2012 at 8:50pm*

**college math**

should the correct be 12/14a - 10/15b is this correct sue
*Saturday, June 9, 2012 at 8:39pm*

**college math**

Evaluate the expression 3x small 2 and y= 5 would the correct answer be 45
*Saturday, June 9, 2012 at 8:35pm*

**college math**

combine like terms (simplify) 11/14a - 1/15b + 1/14a - 11/15b would the correct answer be 12/14a + 10/15b
*Saturday, June 9, 2012 at 8:23pm*

**college math**

ny answer is 6x - 12y - 5 12x 4 - 11y -6x - 9 -4
*Saturday, June 9, 2012 at 8:07pm*

**college math**

combine like terms (simplify) 12x + 4 - 11y - 6x - 9 -y is this clearer Sue
*Saturday, June 9, 2012 at 7:58pm*

**college math**

combine the terms (simplify) 12x + 4 - 11y - 6x -9-y
*Saturday, June 9, 2012 at 7:36pm*

**college math**

multiply -7(2a-4) would the correct answer be 14a-28
*Saturday, June 9, 2012 at 7:34pm*

**college math**

if 5 times a number is increased by 5, the result is 30. Find the number. would the correct answer be 5
*Saturday, June 9, 2012 at 7:30pm*

**college statistics**

consider a population with a mena =51.6 and a sd=5.9 (A) calculate the z score for x= 50.5 from a sample of size 47. (b) could this z score be used in calculating probabilities using table 3 in appendix b in text book ahy or ahy not
*Saturday, June 9, 2012 at 5:06pm*

**College Algebra**

How would I go about solving for x in the equation: ln(4x-2)-ln(4)=-ln(x-2) Thanks in advance
*Thursday, June 7, 2012 at 12:20am*

**college statistics**

find the normal approximation for the binomial probability that x=5 where n=14 and p=0.3 compare this to the value of p(x=5) found in table 2
*Tuesday, June 5, 2012 at 2:18pm*

**English I Part II College Prep Program**

Give two examples of each of the following elements of poetry from the poems you have read in Units 4, 5, and 6. Metaphor: Simile: Personification: Onomatopoeia: Imagery: Sensory Language: Rhyme: Alliteration: Assonance: Consonance: Repetition:
*Monday, June 4, 2012 at 9:39pm*

**college math**

Find the value of the expression -128 + 4^ + 6 - 1
*Monday, June 4, 2012 at 9:33pm*

**college ststistics**

given x =237 u =2.00 and s=12.3 find z
*Monday, June 4, 2012 at 7:20pm*

**college ststistics**

find area under the standard normal curve A). p(z>0.58) B. p(-1.10<z<0)C. P(-1.60>=<z<2.09)
*Sunday, June 3, 2012 at 5:09pm*

**college ststistics**

A. find the binomial probability p(x=5) where n=14 and p=0.30. B. setup without solving the binomial probability p(x is at most 5) using probability notation C. how would you find normal approximation to the binomial probability p(x=5) in part A. please show how you would ...
*Sunday, June 3, 2012 at 4:55pm*

**college statistics**

a set of data is normally distributed with a mean of 1000 and a standard deviation of 100.what would be standard score for a score of 900.what percent of scores is betyween 1000 and 900.what would be percentile rank for a score of 900.
*Sunday, June 3, 2012 at 4:51pm*

**goal writing**

can you give me some ideas on writing goals and a action plan for starting college
*Sunday, June 3, 2012 at 3:47pm*

**statistics**

Reading placement scores for a particular college are normally distributed with a mean of 72 and a standard deviation of 7. a) draw a sketch of the reading placement scores for students at this college. be sure to mark the mean and also to mark one and two standard deviations ...
*Sunday, June 3, 2012 at 10:39am*

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