Friday

January 30, 2015

January 30, 2015

Total # Posts: 721

**Physics**

An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is σ = 1.67 10-7 C/m2, and the plate separation is 1.35 10-2 m. How fast is the electron moving just before it reaches the positive plate? Answer ...
*January 28, 2013*

**Physics**

A spring with an unstrained length of 0.076 m and a spring constant of 2.6 N/m hangs vertically downward from the ceiling. A uniform electric field directed vertically upward fills the region containing the spring. A sphere with a mass of 5.09 10-3 kg and a net charge of +6.5...
*January 28, 2013*

**Physics**

You hold an inflated balloon over a hot air vent in your house and watch it slowly expand. You then remove it and let it cool back to room temperature. During the expansion, which was larger: the heat added to the balloon or the work done by the air inside? explain. (assume ...
*January 25, 2013*

**Physics conceptual**

You hold an inflated balloon over a hot air vent in your house and watch it slowly expand. You then remove it and let it cool back to room temperature. During the expansion, which was larger: the heat added to the balloon or the work done by the air inside? explain. (assume ...
*January 25, 2013*

**Math**

I need help finding discounts and sales tax.Please write out the steps so I fully can undestand the concept Thank You!!
*January 22, 2013*

**math**

Write 3,600,000,000 in scientific notation
*January 10, 2013*

**math**

How far will a migrating duck fly in 7 hours at an average speed of 21 miles per hour
*January 10, 2013*

**math**

The ratio of lefthanded to righthanded students in the school was 3 to 14. If the total number in both categories was 714, how many righthanded students were in the school
*January 10, 2013*

**math**

The average of three number is 3. If the greatest is 4.6 and the least is 1.4 what is the third number
*January 10, 2013*

**math**

Maria ran 4 laps of the track at the same pace. If it took 4 1/2 minutes to run the first 3 laps how long did it take her to run all 4 laps
*January 10, 2013*

**math**

divide as indicated: 0.01 divideby (o.o1 divide 0.001)
*January 7, 2013*

**math**

4 1/3-(2 1/3*1 1/12)=
*January 7, 2013*

**math**

2gal 2qt 2pt-1gal 3qt 1pt 2oz=
*January 7, 2013*

**math**

evaulate: ab-a+bc if a=4 b=2 and c=3
*January 7, 2013*

**math**

p-1/2=1/3
*January 7, 2013*

**math**

evaluate: ab-a+bc if a=4, b=2 and c=3
*January 7, 2013*

**math**

what number is 3/5 of 6
*January 7, 2013*

**math**

the jenkins started their trip with a full tank of gas and 48,961 miles on their car.They stopped and filled the gas tank seven hours later with 14.0 gallons of gas.At that time the car total mileage was 49,381. The jenkins car traveled an average of how many miles per gallon ...
*January 7, 2013*

**math**

the ratio of cetaceans to fish in the harbor was 3 to 13. how many fish were in the harbor if there were 390 cetaceans
*January 7, 2013*

**math**

the jenkins started their trip with a full tank of gas and 48,961 miles on their car.They stopped and filled the gas tank seven hours later with 14.0 gallons of gas.At that time the car total mileage was 49,381. what was the car average speed in miles per hour for the first ...
*January 7, 2013*

**math**

at 9:00 am Marsha found a parking meter that still had 5 minute until it expired.she quickly put a quarter, 1 dime, and a nickel into the meter and went to her meter and went to her meeting.If 5 cent buys 15 minute of parking time at what time will the meter expire
*January 7, 2013*

**math**

multiply as indicated: 8.6*5 1/4 (decimal)
*January 7, 2013*

**math**

8.6* 5 1/4 (decimal)
*January 7, 2013*

**math**

solve: 5n=32
*January 7, 2013*

**math**

evaluate: ab-(a-b) if a=0.5 and b=0.4
*January 7, 2013*

**math**

simplify: (-6)+(-3)-(-1)-(+4)=
*January 7, 2013*

**math**

replace the circle with the proper comparison symbol 3-5 3+(-5)
*January 7, 2013*

**math**

3/5
*January 7, 2013*

**math**

draw a diagram of this statement. three fifths of the baker 60 cookies were chocolate cookies (a) how many of the baker cookies were chocolate? (b) what percent of the bakers cookies were not chocolate cookies
*January 7, 2013*

**math**

if the product of six tenths and three tenths is subtracted from the sum of two tenths and four tenths. what is the difference
*January 7, 2013*

**math **

pistachios were priced at 3 pounds for 6.99 (A)what was the price per pound (B) how much would 10 pounds of pistachios cost
*January 7, 2013*

**math**

it was 96 kilometers from Perry to medford. David raced to Medford and idled back.If the round trip took 8 hours what was his average speed in kilometers per hour
*January 7, 2013*

**This needs tobe turned in in 10min AT MOST URGENT!**

so... 1-C 2-A 3-C 4-B 5-D?
*December 21, 2012*

**psychology**

Which of the following individuals was instrumental in the early research examining fitness levels in depressed patients? A. Robert Cattell B. William Morgan C. Hans Selye D. James Blumenthal
*December 10, 2012*

**ICP**

Mike is swinging at the playground. At one point, he is moving at 2 m/s. His mass is 72 kg, and he is 0.6 m off the ground. What is his mechanical energy?
*December 7, 2012*

**Science**

The ripples in a certain groove 12.7 cm from the center of a 33-rpm phonograph record have a wavelength of 1.75 mm. What will be the frequency of the sound emitted?
*November 29, 2012*

**math2**

how to solve 2[5a-3(4a-b)]-4[8b+5(a-2b)]
*November 20, 2012*

**math**

9p+q+6p+5q+5p-5q
*November 14, 2012*

**Physics**

Two long straight wires are perpendicular to the page and located at distances d1 = 2 cm and d2 = 3.5 cm from the origin. Wire 1 carries current 5 A out of the page. If the net magnetic field due to the two currents is at an angle of 45 degrees to the x-axis at the origin, ...
*November 12, 2012*

**math**

determine the common difference in the squence x,x+1,x+2,x+3..
*November 9, 2012*

**Chemistry**

I need to understand, which has more effect in inducing the reaction of silver salts. Intensity or wavelength?
*November 4, 2012*

**History**

Hi for my school work I have to say out of which three colonies experienced more freedom in the seventeenth century which is hard for me to explain. The three colonies being New England,Dutch and Virginia/maryland If anyone can help thank you
*October 20, 2012*

**Math**

What is the ratio in simplest form from 16 to 20
*October 16, 2012*

**Physics**

A motor cycle starts from rest and reaches a speed of 6m/s after travelling with uniform acceleration for 3s. What is his acceleration?
*October 14, 2012*

**chemistry**

the net ionic equation for the following molecular equation KNO2(aq) + HCl(aq) KCl(aq) + HNO2(aq)
*October 10, 2012*

**math**

nearest degree to an obtuse angle
*October 3, 2012*

**PSYCHOLOGY**

what are the apparent symptoms of anxiety in terms of physiological, behavioral, and cognitive indicator? if both a parent and a child experience anxiety in similar situations, how would you account for the influences of heredity, preparedness, and vicarious conditioning
*October 1, 2012*

**Intermediate Algebra**

Maria drove 3 hours and 30 minutes in a dust storm. When the dust cleared she inccreased her speed by 35 mph and drove for 4 more hours. If she traveled a total of 365 miles, how fast did she drive during the dust storm?
*September 30, 2012*

**Accounting**

Calculate variable cost variances—explain results The standards for one case of Springfever Tonic are: Direct materials . . . . . . . . . . . . . . . . . . 8 lbs. @ $3.00/lb. = $24 Direct labor . . . . . . . . . . . . . . . . . . . . . 6 hrs. @ $1 0.00/hr. = 60 Variable ...
*September 20, 2012*

**World History**

How did civilized culture survive the rise and fall of regional states? During the Sumer, Babylon time period
*September 13, 2012*

**math**

if kevin walk two third of a mile in two fifths of a hour how many miles in one hour can he walk
*September 12, 2012*

**american government**

thanks
*August 19, 2012*

**american government**

it maybe B this is my first time on this site asking for help i just didnt understand it,
*August 19, 2012*

**american government**

please tell me if i am right
*August 19, 2012*

**american government**

i think its D
*August 19, 2012*

**american government**

an example of a policy that aimed chiefly to overcome defacto discrimination is: a. the equal rights admendment B. busing the chieve racial integration in the schools C. the brown v board of education of topeka ruling D. the fourteen amendment
*August 19, 2012*

**accounting**

Prepare a monthly Cash Budget in tabular form for the months of February, March and April; showing the bank balance at each month's end. Company Information and Background The following data is available from the various functional budgets prepared at Congo Limited. ...
*July 24, 2012*

**physics**

A van traveling down a slope with a uniform acceleration of 2.15 meters/second2 attains a speed of 20.00 meters/second after 7.00 seconds. What is the initial velocity of the van?
*July 9, 2012*

**calculus**

What are the critical numbers of the function: s(t)=3t^4+12t^3-6t^2
*July 8, 2012*

**Statistics**

among customers- 70% buy popcorn, 40% buy ice cream, and 25% by both. Suppose you pick one customer at random. Find the probability the customer buys popcorn or ice cream.
*June 15, 2012*

**History**

yeah i was wondering the same thing is it C? Dont worry Ms Sue Ive seen you do your job just right IDK what "ANONYMOUS PANTS" here is talking about... Dont mind ignorant people.
*June 6, 2012*

**Math**

Michael purchased a certain number of share of one stock for a total of $2800. The second stock was selling for $6 less per share . Michael could have bought 6 more shares of the second stock for the same amount of money. How many shares of the first stock did Michael purchase...
*June 6, 2012*

**Math**

Two cranes can unload a ship together in 15 hours. The faster crane takes 16 hours less than the slower crane, if each were to unload the same ship alone. How long does it take for each crane to unload a ship
*May 21, 2012*

**Chemistry**

Given the following thermochemical data: 1) C(s) + O2(g) -> CO2(g) ∆H = -393.5 kJ 2) H2(g) + 1/2 O2(g) -> H2O(l) ∆H = -285.8 kJ 3) 3 C(s) + 3 H2(g) -> C3H6(g) ∆H = +20.4 kJ 4) C3H6 (cyclopropane)(g) -> C3H6(propene)(g) ∆H = -33.0 kJ What is ...
*May 15, 2012*

**Chemistry**

In the future, you are employed as an organic chemist in a petrochemical company. You decide to quickly prepare the ester ethyl-3-cyclohexylpropanoate from 3-phenyl-1-propane and ethene. Describe the process you would use.
*May 15, 2012*

**chemistry**

In the future, you are employed as an organic chemist in a petrochemical company. You decide to quickly prepare the ester ethyl-3-cyclohexylpropanoate from 3-phenyl-1-propane and ethene. Describe the process you would use.
*May 15, 2012*

**Chemistry**

How do I identify the reducing agent in a reaction of magnesium with oxygen?
*May 13, 2012*

**English**

18. In “Babylon Revisited,” why did Fitzgerald choose the title to be metaphoric of Paris? (1 point) Paris is a symbol of luxury. Paris is living in a wealth that will end up destructive. Paris was built to look like Babylon. Paris is the city of love. Matching Match...
*May 8, 2012*

**english**

15. In Langston Hughes’s short story “Why, You Reckon?” what motivates the narrator to get involved in a scheme to rob a white person? (1 point) greed—he wants to earn more money in order to buy nicer things hunger—he needs the money to buy more food ...
*May 8, 2012*

**English**

12. When an author uses a concrete object to represent an idea or emotion it is called (1 point) style symbolism mood aphorism 13. What does “renaissance” mean? (1 point) renewal recollection rebirth return My answers: 12.b 13.c
*May 8, 2012*

**Scholastic News**

I have been given a plot graph of the # of tornados in the u.s between 2001 and 2011. The # of tornados side starts at 0 then 200,400,600,800,1000 and so forth up to 2,000. Now here is the problem: Between which two consecutive years on the graph did the number of tornadoes ...
*April 23, 2012*

**calculus**

A swimming pool is a rectangular solid 15 ft wide, 40 ft long, and at most 4 ft deep. Water is being added to the pool at the rate of 25 cubic ft per minute. How fast is the water rising when there is 1800 cubic ft of water in the pool?
*April 19, 2012*

**martha valle high school**

Find to the nearest meter the height of a building if its shadow is 42 meters long when the angle of elevation of the sun measures 42°
*April 17, 2012*

**World History**

What was the only thing that united East & West Pakistan? Time period: - Decolonization in India and Africa, 10th grade history
*April 9, 2012*

**Calculus**

Another one I'm not sure about is the limit as x approaches infinity of (x^2)/lnx I took the derivative of the top and bottom and got 2x/(1/x) which is the same thing as 2x^2. Can I keep going or do I just say that the limit does not exist?
*March 30, 2012*

**Calculus**

Oh I forgot I could use the rule more than once. Thanks!
*March 30, 2012*

**Calculus**

So I'm trying to do my homework on L'Hopital's rule. There's this one problem I have to do where I have to find the limit as x approaches negative infinity of (x^4)(e^x). How do I do this, since it's not in the form f(x)/g(x)? Thanks
*March 30, 2012*

**Geometry**

523.3
*March 28, 2012*

**Statistics **

Long term experience showed that after a type of eye surgery, recovery time has a mean of u = 5.3 days in a hospital. A random sample of 40 patients, with this type of eye surgery, were treated as outpatients during recovery and the sample mean recovery time was 4.2 days. Does...
*March 25, 2012*

**Statistics**

The average annual salary of employees at Wintertime Sports was $28,750 last year. This year the company opened another store. Suppose a random sample of 18 employees had an average annual salary of $25,810 with standard deviation of s = $4230. Use a 1% level of significance ...
*March 25, 2012*

**Statistics**

How long does it take to have food delivered? A Chinese restaurant advertises that the mean delivery will be no more than 30` minutes. A random sample of delivery times is shown below. Based on this sample data, is the mean delivery time different than 30 minutes? Use a 5% ...
*March 25, 2012*

**Statistics**

A large furniture store has begun a new ad campaign on local television. Before the campaign, the long term mean daily sales were $24,819. A random sample of 40 days during the new ad campaign gave a sample mean daily sale of $25,910. Does this indicate that the population ...
*March 25, 2012*

**Statistics**

Computer Depot is a large store that sells and repairs computers. A random sample of 110 computer repair jobs took technicians an average of 93.2 minutes per computer. Assume that o is known to be 16.9 minutes. Find a 99% confidence interval for the population mean u for the ...
*March 25, 2012*

**Statistics**

Mr. Crandall has assigned a term paper due at the end of the semester. He would like to know the average length of the papers. The data below are the he numbers of types pages from a random sample of 10 term papers. Use these data to compute a 95% confidence interval for the ...
*March 25, 2012*

**Statistics**

A random sample of 14 evenings at the O'Sullivan house hold showed that the family received an average of 2.4 solicitation calls each evening. The sample standard deviation was s= 0.9. Find a 99% confidence interval for the population mean number of solicitation calls this...
*March 25, 2012*

**Statistics**

A study is being planned to estimate the mean number of semester hours taken by students at a college. The population standard deviation is assumed to be o=4.7 hours. How many students should be included in the sample to be 99% confident that the sample mean is within one ...
*March 25, 2012*

**math**

? I need help. I'm asking what it means to simplify :O
*March 22, 2012*

**math**

simplify. 1) 9 - 3 - 4 2) 9 + 1 +3 3) 6 + 1 + 3 4) 5 + 4 - 2 5) 6 - 5 + 2 6) 9 - 2 + 5
*March 22, 2012*

**chemistry**

If 73.5 g of liquid Br2 and 330 mL of 1.18 M aqueous NaI are reacted stoichiometrically according to the balanced equation, how many grams of liquid Br2 remain? Round your answer to 3 significant figures. 2NaI(aq) + Br2(l) → 2NaBr(aq) + I2(s)
*March 20, 2012*

**chemistry**

how many grams are in 49.0 mL of NaOH
*March 13, 2012*

**Calculus 1**

A rectangular field is enclosed by a fence and seperated into two parts by a fence parallel to one of the sides. If 600 m of fencing is available, what should the dimensions be so that the area is a maximum?
*March 8, 2012*

**history**

I agree its B
*March 7, 2012*

**geometry**

State a conclusion that seems reasonable. 6 + 0 = 6, 8 + 0 = 8, 9 + 0 = 9, 100 + 0 = 100. Conclusion:
*March 5, 2012*

**geometry**

There are six marbles in the bag and three of them are purple, three of them are black.
*March 5, 2012*

**Calculus**

dy/dx = 4xy^2 I need to find the integral of that. So I separate the variables and have 1/y^2 dy = 4x dx. Where do I go from here?
*March 2, 2012*

**Math**

8,16
*March 1, 2012*

**Chemistry**

I need to find the volume of 5.44 molar nitric acid needed to completely react with 6.27 grams of Ca(OH)2.
*February 29, 2012*

**L.A.**

Hi,we are learning about the african americans in america. What would an example of racism like with the white only signs should i do?
*February 28, 2012*

**math**

The hour hand is closer to the six
*February 28, 2012*

**math**

Hi,does anyone know the basics of adding fractions? For example 2/4+2/8=?
*February 28, 2012*

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