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Homework Help: College

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statistics
In a random sample of 112 State College students, 41 students reported being current smokers. a) Calculate the 95% confidence interval for the proportion of State College students who smoke.
Monday, May 7, 2012 at 10:44am

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.
Sunday, May 6, 2012 at 5:38pm

math
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 490 college students showed that 33% of them had, or intended to, cheat on examinations. Find the margin of error for the 95% confidence interval.
Sunday, May 6, 2012 at 5:36pm

Writing
Can you proofread my research paper, I mostly need help on vary sentence structure? Being Poor Doesn’t Mean a Thing “You are my sunshine, my only sunshine. You make me happy when the skies are grey.” These are the lines from Louisiana’s famous singing ...
Sunday, May 6, 2012 at 3:21pm

statistics
To determine how many hours per week freshmen college students watch television, a random sample of 225 students was selected. It was determined that the students in the sample spent an average of 35 hours watching TV per week. The population standard deviation is known to be ...
Sunday, May 6, 2012 at 12:14am

Nutrition
Read this summary and then answer the questions. This is Tyler's freshman year in college, and he has been earning good grades and performing well in his part-time job. However, Tyler's eating habits have been poor, and has gained a few pounds. His expanded waistline ...
Saturday, May 5, 2012 at 11:16pm

College algebra
An architect wishes to design a large room 122 feet long that will be a whispering gallery. The ceiling of the room has a cross section that is an ellipse whose foci are to be located 14 feet to the right and the left of center. Find the height h of the elliptical ceiling ( to...
Saturday, May 5, 2012 at 3:23am

College algebra
A circular vent pipe with a diameter of 5.5 inches is placed on a roof that has a slope of 1/4. Find an equation of the ellipse that should be cut from the roof so that the pipe will fit. Round parameters to the nearest hundredth.
Saturday, May 5, 2012 at 3:21am

College algebra
Find the standard form of the equation of the hyperbola with the given characteristics. Foci:(+4,0) or (-4,0) Asymptotes: y=4x or y=-4x.
Saturday, May 5, 2012 at 2:48am

College algebra
A fountain in a shopping mall has two parabolic arcs of water intersecting. The equation of one parabola is y = -0.25x^2+2x and the equation of the second parabola is y=-0.205x^2+4x-11.75. How high above the base of the fountain do the parabolas intersect? All dimensions are ...
Saturday, May 5, 2012 at 1:47am

College Chemistry
A gas containing carbon and hydrogen analyzed as 85.6 % carbon and 14.4 % hydrogen. A 42.1 g sample of a gas occupied a volume of 7490 mL with a pressure of 2280.0 torr at 92 °C. Enter the molecular formula of the compound. Thanks.
Friday, May 4, 2012 at 8:32pm

College chemistry
Need help balancing chemical equation. Complete and balance the chemical equation. Be sure to include the states of the reactants and products. C3H8(g)+O2(g) →
Friday, May 4, 2012 at 1:49am

intro to chemistry (college)
A 64.8 g mixture of the compounds potassium sulfide and calcium oxide is 17.1 % by mass potassium sulfide. The compound calcium oxide is 71.5 % by mass calcium. Calculate the mass (g) of oxygen in the mixture. mass % = mass part/mass whole x 100. I attempted the problem by ...
Thursday, May 3, 2012 at 11:46pm

Chemistry College
A 79.1 g mixture of the compounds calcium chloride and sodium sulfide is 80.9 % by mass sodium sulfide. The compound sodium sulfide is 58.9 % by mass sodium. Calculate the mass (g) of sulfur in the mixture. thanks.
Thursday, May 3, 2012 at 11:43pm

programmer
/ Cooper College maintains a master file of students and credits earned // Each semester the master is updated with a transaction file // that contains credits earned during the semester // Each file is sorted in Student ID number order start Declarations num masterID string ...
Thursday, May 3, 2012 at 7:09pm

college math
Evaluate the expression for the given values. 6v less 12w for v = 10 and w = 2
Thursday, May 3, 2012 at 6:17pm

Math
Assume that the cost of a college education increases an average of 5% per year. If the in-state tuition at the University of Florida is $2256 per year, what will the tuition be in 10 years?
Thursday, May 3, 2012 at 5:18pm

math
one out of 43 high school ball players plays college ball.one out of 38 college players plays professional ball. what fraction of high school players plays professional ball?
Thursday, May 3, 2012 at 3:48pm

English arts 1 Nouns
Aaron plans to attend college once he completes this course workbook. im suppose to identify the nouns in the sentence the nouns are Aaron,college,workbook right? im debating on course idk? help lol
Thursday, May 3, 2012 at 1:42pm

College Algebra
The parking lot is 25 by 40 feet. The owner wants to enlage the parking lot by paving an equal width strip on the north side and east side of the lot, sot hat the new lot will be twice the area of the old one. Find the equation which has as a root the proper width of the strip.
Wednesday, May 2, 2012 at 9:03pm

College Algebra/Geometry
What size should be the frame be? Suppose an artist has a circular picture with a diameter 6 inches which she wishes to frame by a uniform width frame with covers 1/2 inch width uniformity of the painting and has total area equal to that of the exposed painted surface when the...
Wednesday, May 2, 2012 at 9:00pm

college alegbra
1/2 log 25- 3 log x
Wednesday, May 2, 2012 at 5:00pm

statistics
when 325 students are randomly selected and surveyed, it is found that 117 own a car. Construct a 99% confidence interval estimate of the true proportion of all college students who own a car.
Wednesday, May 2, 2012 at 4:55pm

Basic college math
A rectangular kennel measures 26 1/2 feet by 20 1/4 feet. Find the area of the kennel in square feet.
Wednesday, May 2, 2012 at 1:03pm

Discreet MAth
Describe the graph and why it is consistent with the matrix. How many simple paths are there from vertex 1 to vertex 5? Explain.Which is the shortest of those paths? Part II: Trees Construct and describe a tree that indicates the following: A college president has 2 employees ...
Wednesday, May 2, 2012 at 12:47am

Discreet MAth
Describe the graph and why it is consistent with the matrix. How many simple paths are there from vertex 1 to vertex 5? Explain.Which is the shortest of those paths? Part II: Trees Construct and describe a tree that indicates the following: A college president has 2 employees ...
Tuesday, May 1, 2012 at 11:41pm

Sociology
By a narrow margin, Dr. Moreau was elected chair of the largest academic department at Faber College. She appointed faculty members who support her views to the most influential and important committees in the department. This group of loyal colleagues, on which Dr. Moreau is ...
Tuesday, May 1, 2012 at 7:12pm

english/check please
Change each of these indirect quotations to direct quotations.Punctuate your quotation properly. examples: - Mrs king said,"I enjoyed our golf game" _Mrs king said that she enjoyed the golf game. 1)Mrs.King said that she wants a new putter. -Mrs King said," I ...
Tuesday, May 1, 2012 at 1:50pm

college chemistry
which of the following combinations is not suitable for making a buffer? h3po4 and nah2po4 na2co3 and nahco3 nh4cl and nh3 nah2po4 and na2hpo4 hclo4 and naclo4
Monday, April 30, 2012 at 1:43pm

chemistry(college)
A student reacts benzene,C6H6. with bromine. Br2. in an attempt to prepare bromobenzene. C6HSBr : C6H6 + Brl·---·-_·_-> C6HSBr + HBr (a) What is the theoretical yield of bromobenzene in this reaction when 60.0 g of benzene reacts with 60.0 g Brl? b) If ...
Monday, April 30, 2012 at 12:45pm

Probability and Statistics
The ACT scores of applicants to college are approximately normally distributed with a mean of 20.3 and a standard deviation of 3.1. If a random sample of 20 applicants to college is chosen find the probability that their average ACT score will be 19 and 21.
Sunday, April 29, 2012 at 8:09pm

@elena
thank you so much help with the problem. i have trouble solving part b of the problem you helped me with. it told me to give it as a percentage, I got 10% but it is wrong. can you please help me Superman must stop a 190-km/h train in 180m to keep it from hitting a stalled car ...
Sunday, April 29, 2012 at 5:50pm

college physics
Superman must stop a 190-km/h train in 180m to keep it from hitting a stalled car on the tracks. part a)If the train's mass is 3.8×10^5kg , how much force must he exert (find the magnitude)? part b)Compare to the weight of the train (give as %). partc) How much force...
Sunday, April 29, 2012 at 4:59pm

College Chem
if the pH of rain water is 5.6 on average what is the concentration of carbonic acid in rain water?
Thursday, April 26, 2012 at 11:09pm

english
write the dependent clause and the subordinate conjunction 1)( If)sub (you want to play the piano better),dep you have to practice.( 2(-I plan to study)dep ( until) sub I finish . 3-Justin saved his money (in order that)sub( he could go to college) dep. 4-( When)sub ( Lisa ...
Thursday, April 26, 2012 at 9:03pm

English Grade 11 College
I have trouble understanding of this article and how to answer the questions given. I just started new to school in Toronto; I was living in Turkey for Years So I do please to take your time to look and examine my homework. I greatly appreciate your patience and time and ...
Thursday, April 26, 2012 at 8:54pm

College math
1.Find the height to the nearest foot of a tree that makes a 50-foot shadow when a 2 ft. 6 in. pole is used to make a shadow of 3 feet.
Thursday, April 26, 2012 at 8:51pm

Intermediate Algebra (college)
Use the properties of logarithms to condense the expression 1/3[ln(x - 6)- 4 ln y - 2 ln z]
Thursday, April 26, 2012 at 8:28pm

english
write the dependent clause and the subordinate conjunction 1) If you want to play the piano better (depend),you have to practrice.(subordinate) 2) Justin saved his money (dep) inorder that he could go to college. (sub)
Thursday, April 26, 2012 at 7:47pm

COLLEGE ALGEBRA
THE PRIMETER OF SOME TRAFFIC SIGN MUST BE 78INCHES ALSO ITS LENGTH IS 7INCHES LONGER THAN ITS WIDTH FIND THE DIMENSIONS OF THE SIGN WHAT IS THE LENGTH WHAT IS THE WIDTH
Wednesday, April 25, 2012 at 9:55pm

English Helppppp
a persuasive argument that will promt your college to offer a summer block of cources that deal exclusively with current trends in the career field in which you are pursuing a degree, or in a field in which you have a keen interest. ok i plan to write about fashion designing ...
Wednesday, April 25, 2012 at 8:36pm

College Chemistry
I need help with this question!! a sample of pure KHP weighing .8097g dissolved in water and titrated with 40.25 mL of NaOH solution. The same NaOH solution was used to titrate a solution of a weak diprotic acid H2X. A sample of 0.18694g of the weak acid was first dissolved in...
Wednesday, April 25, 2012 at 7:43pm

College Algebra
bank a is lending money at 5.7% interest compounded annually. The rate at bank b is 5.6% compounded monthly, and the rate at bank C is 5.65% compounded quarterly. Which bank will you pay the least interest?
Wednesday, April 25, 2012 at 12:34pm

College Accounting
How do the entries affect account balances and why both debit and credit entries can increase or decrease an account balance?
Tuesday, April 24, 2012 at 10:09pm

algebra college level
it says y=-16x+181 represents number of students in class where x represents number of hours study required weekly. what is rate of change of number of students in class to number of hours study
Tuesday, April 24, 2012 at 2:47am

business Maths
Leslie Hart borrowed $15,900 to pay for her child’s education at Riverside Community College. Leslie must repay the loan at the end of 6 months in one payment with interest. (a) How much interest must Leslie pay? (Do not round intermediate calculation. Round your answer ...
Monday, April 23, 2012 at 10:12pm

Health
Jennifer is fifty-four. Her husband Brian died suddenly in a care crash. Not only was she emotionally distraught, but she found herself in serious financial turmoil. Brian had handled the finances (at least she had thought he had) throughout their 21 year marriage. Upon his ...
Sunday, April 22, 2012 at 11:51pm

College Majors?
I am a senior rapidly approaching the end of my high school education. Of course college is on my rader. I plan to go to double-major in journalism and art. I want to get my bachelor's degree in journalism so I can become an editor. I can work this job from home while ...
Sunday, April 22, 2012 at 8:39pm

Writing - application essay
I am writing an application essay to try and get accepted into Haywood Early College. I am writing four paragraphs and I already have 2 paragraph topics. I guess what I am trying to ask is could I possibly get help with 2 more topics?
Sunday, April 22, 2012 at 1:42pm

College
An electron enters the region of a uniform electric field, with v1=3*10^6 m/s and E=200N/C. The horizontal length of the plates is 0.100m 1. Fine the acceleration of the electron while in the field. 2. If the electron enters the field at a time t=0, find the time at which it ...
Sunday, April 22, 2012 at 9:26am

Statistics
A newspaper article stated that college students at a local university spent an average of $95 on beer a year. A student investigator who believed the average stated was too high polled a random sample of 50 students and found a mean of $92.25 and s = 10 Use these results to ...
Saturday, April 21, 2012 at 5:13pm

College Algebra
log5 (x+2)+log5(x-2)=3
Friday, April 20, 2012 at 8:07pm

College Algebra
log(x+10)=1+log(4x-3)
Friday, April 20, 2012 at 8:06pm

College Algebra
ln(8x+3)=ln11
Friday, April 20, 2012 at 8:05pm

College Algebra
Solve the equation. If necessary, round to the nearest thousandth. 5(2x-1)=10
Friday, April 20, 2012 at 7:57pm

MATH##$$&&^^**
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll of 490 college students showed that 33% of them had, or intended to, cheat on examinations. Find the margin of error for the 95% confidence interval.
Friday, April 20, 2012 at 5:44pm

economics
Over the last 30 years in the United States, the realprice of a college education (i.e., after adjusting for inflation) has increased by almost 70 percent. Over the same period, an increasing number of high school grad- uates have sought a college education. (Nationwide ...
Friday, April 20, 2012 at 4:59pm

Statistics
12. The proportion of students who own a cell phone on college campuses across the country has increased tremendously over the past few years. It is estimated that approximately 94% of students now own a cell phone. Twenty five students are to be selected at random from a ...
Thursday, April 19, 2012 at 12:00pm

College General Biology
A man who is a non-tongue roller (t) marries a woman tongue roller (T) whose father was a non-tongue roller (t) - what would the expected genotype and phenotype percentage for their offspring?
Wednesday, April 18, 2012 at 2:01pm

college physics
When a projectile lands, the angle made between the projectile and the ground corresponds to which of the following aspects of its motion? a)the direction of the acceleration vector just before impact b)direction of the velocity vector just before impact c)direction of the ...
Wednesday, April 18, 2012 at 4:55am

college physics
When a projectile lands, the angle made between the projectile and the ground corresponds to which of the following aspects of its motion? a)the direction of the acceleration vector just before impact b)direction of the velocity vector just before impact c)direction of the ...
Wednesday, April 18, 2012 at 1:08am

college physics
Consider a projectile that is thrown upward at an angle between 10 and 80 degrees from the horizontal, when are the acceleration and velocity vectors perpendicular to each other? (Only consider the motion during free fall.) a) nowhere b)at the highest point c)the launch point ...
Wednesday, April 18, 2012 at 1:03am

College Chemistry
Now the reaction (2NO+2H2==> 2H20+N2) is believed to take place in three steps, the first of which is the fast reversible dimerization of NO to form N2O2, and the last of which (again fast) is the reaction N20 + H2 --> N2 + H2O. So, what is the slow (second) step? Then ...
Tuesday, April 17, 2012 at 11:54pm

college Calculus Help!
If f(x)= ∫(21,x) t^5 dt then f'(x). my answer was 1/6 (21^6-x^6) it said it's wrong.
Tuesday, April 17, 2012 at 3:07pm

COLLEGE CALCULUS. HELP!
the fundamental theorem of calculus, f(x)=∫(0,x) t^3+2t^2+ 2 dt, and find f"(x). my answer was: f'(x)=x^3+x^2 f"(x)=3x^2+2x it said its wrong. i dont know how solve with interval, ∫(0,x)
Tuesday, April 17, 2012 at 2:36pm

College Physics
A 30.0 m steel wire and a 22.0 m copper wire, both with 1.00 mm diameters, are connected end to end and stretched to a tension of 170 N. How long does it take a transverse wave to travel the entire length of the two wires? (Take the mass per unit length of the wires to be 7....
Monday, April 16, 2012 at 7:21pm

College Algebra
The number of Mosquitoes M9x), in millions, in a certain area depends on the June rainfall x, in inches:M(x)=19x-x^2. What rainfall produces the maximum number of mosquitos?
Monday, April 16, 2012 at 6:12pm

college chemistry
Followed by the total volume. Calculate the molarity of this solution: 0.521 mol NaCl;125 mL
Monday, April 16, 2012 at 5:55pm

College Chemistry
A sample of an iron alloy contains 92.1g Fe, 2.59g C, and 1.59g Cr. Calculate the percent by mass of each component present in the alloy sample.
Monday, April 16, 2012 at 5:09pm

Math
Nico was stunned when he opened the mail. Here was a check for $322.50! This was the interest he earned on his investment. One year ago Nico had been given $5,000. His parents made him put it in the bank and save it for college, but they said he could keep the interest it ...
Monday, April 16, 2012 at 4:40pm

college algebra
a cub measures n inches on each edge. If a slice 1 inch thick is cut from one face of the cube and then a slice 3 inches thick is cut from another face of the cube, the resulting solid has a volume of 1560 cubic inches. Find the dimensions of the original cube.
Monday, April 16, 2012 at 2:45pm

college algebra
A propane tank has the shape of a circular cylinder with a hemisphere at each end. The cylinder is 6 feet long and volume of the tank is 5pie cubic feet. Find, to the nearest thousandth of a foot the length of the radius x.
Monday, April 16, 2012 at 2:38pm

College Math
Consider the following expression. 3(x-2)-9(x^+7x+4)-5(x+8)
Monday, April 16, 2012 at 2:31pm

College Math
The "learning curve" describes the rate at which a person learns certain tasks. If a person sets a goal of typing N words per minute (wpm), the length of time t (in days) to achieve this goal is given by the following formula. t=62.5ln(1-N/80) (a) According to this ...
Monday, April 16, 2012 at 2:19pm

College Math
A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.3 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)
Monday, April 16, 2012 at 2:16pm

College Math
An artifact was found and tested for its carbon-14 content. If 88% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.
Monday, April 16, 2012 at 2:14pm

college chemistry
Lithium metal decomposes in water and releases hydrogen gas. if 275 ml of hydrogen gas is produced at stp. what is the mass of lithium that reacted ? Li(s)+H2O(l)=LiOH(aq)+H2(g)
Sunday, April 15, 2012 at 10:59pm

College Chem 1010
Which of the following compounds is insoluble? Question 4 options: A) Ca(NO3)2 B) FePO4 C) NH4OH D) Na2SO4 E) NaCl
Sunday, April 15, 2012 at 10:48pm

Reposting Chemistry College
Based on the balanced equation 4Na + O2 → 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.
Sunday, April 15, 2012 at 8:34pm

College Chem
Based on the balanced equation 4Na + O2 → 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.
Sunday, April 15, 2012 at 7:34pm

college chemistry
The solvay process in an industrial method for preparing baking soda. In the process, CO2, NH3, H2O, and NaCl react to produce NaHCO3. If 25.0 L of carbon dioxide gas at STP and 20.0 L of ammonia gas at STP react in excess water and salt, what is the mass of baking soda ...
Sunday, April 15, 2012 at 6:18pm

physics - college
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before the police car ...
Sunday, April 15, 2012 at 5:50pm

physics - college
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before the police car ...
Sunday, April 15, 2012 at 5:32pm

college physics 44
An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before the police car ...
Sunday, April 15, 2012 at 4:38pm

College Chem
Based on the balanced equation 4Na + O2 → 2Na2O calculate the number of Na2O formula units formed when 60 Na atoms and 10 O2 molecules react? Thanks.
Sunday, April 15, 2012 at 3:57pm

COLLEGE CALCULUS. HELP!
the fundamental theorem of calculus, f(x)=∫(0,x) t^3+2t^2+2dt, and find f"(x). my answer was: f'(x)=x^3+x^2+2 f"(x)=x^4/4 + 2x^3/3 + 2x it said its wrong.
Sunday, April 15, 2012 at 2:52am

COLLEGE CALCULUS. HELP!
Evaluate the definite integral ∫(0,2) (x-1)^25 dx.. thats how i got stuck u=x-1, then du=dx =∫(0,2) u^25du =(1/26)u^26. i dont know what to do with integral (2,0)..
Saturday, April 14, 2012 at 3:07am

Trig/PreCalc
Teach me how to express 5sqrt3 - 5i in polar form please. I don't want you to do the work for me. Just show me the steps I need to do the work properly on my own. Otherwise I will not pass this class or the exam when I enter college, and I do not want to retake PreCalc. ...
Friday, April 13, 2012 at 3:44pm

College Comp II
What is the meaning & how did you figure it out? thanks March for a One Man Band by David Wagoner He’s *a boom a blat* in the uniform Of an army *tweedledy* band *a toot* Complete with medals *a honk* cornet Against *a thump* one side of his lips And the other stuck with...
Thursday, April 12, 2012 at 8:45pm

College physics
A 0.006 00-kg bullet traveling horizontally with a speed of 1.00 x 10^3 m/s enters an 20.1-kg door, imbedding itself 10.9 cm from the side opposite the hinges as in the figure below. The 1.00-m wide door is free to swing on its frictionless hinges. At what angular speed does ...
Wednesday, April 11, 2012 at 1:40pm

College Algebra
Annual profit in thousands of dollars is given by the function, P(x) = -.1x^2 + 50x - 300, where x is the number of items sold , x >= 0. 1.describe the meaning of the number -.1 in the formula. 2.describe the meaning of the number -300 in the formula. 3.find the profit for ...
Monday, April 9, 2012 at 9:00pm

College Physics
A 1.70 kg object attached to a spring moves without friction and is driven by an external force given by F = (3.00 N) sin(2πt). (a) If the force constant of the spring is 20.0 N/m, determine the period. _____s For this one I tried 2*pi*sqrt(1.7/20) but it said my answer ...
Monday, April 9, 2012 at 8:38pm

Consumer math
When Greg was born, his grandmother put $5000 in a savings account for his college expenses. It was compounded at 2.5 percent semiannually, and left in the account 18 years. How much was in the account? Round to the nearest dollar.
Monday, April 9, 2012 at 10:21am

Statistics
I'm going over some practice problems and I can't seem to figure this one out. Can anybody give me some help please? On a measure of artistic ability, the mean for college students in New Zealand is 150 and the standard deviation is 25. Give the Z scores for New ...
Monday, April 9, 2012 at 1:36am

Math 1330
In a survey of 1000 eligible voters selected at random, it was found that 200 had a college degree. Additionally, it was found that 90% of those who had a college degree voted in the last presidential election, whereas 47% of the people who did not have a college degree voted ...
Monday, April 9, 2012 at 12:07am

college chem
A sample of 8.00 L of NH3 (ammonia) gas at 22 degrees and 735 torr is bubbled into a 0.500 L solution of 0.400 M HCl (hydrochloric acid). The Kb value for HCl is 1.8x10^-5. Assuming all the NH3 dissolves and that the volume of the solution remains at 0.500 L, calculate the pH ...
Sunday, April 8, 2012 at 7:31pm

College Physics
A 40 kg child is standing on the edge of a merry-go-round in a playground. Before they were deemed too dangerous, these were quite common. They were just huge rotating platforms you could sit on while someone spun you around in uniform circular motion until you screamed in ...
Sunday, April 8, 2012 at 6:23pm

College Physics 2056
An electromagnetic wave strikes a 3.00-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.00 10-4 T. How long does it take for the wave to deliver 1000 J of energy to the wall?
Sunday, April 8, 2012 at 12:24am

Chemistry
From data below, calculate the total heat (J) needed to convert 0.172 mol of gaseous ethanol (C2H6O) at 351° C and 1 atm to liquid ethanol at 25.0° C and 1 atm. Boiling point at 1 atm 78.5°C c gas 1.43 J/g · °C c liquid 2.45 J/g · °C ΔH&...
Saturday, April 7, 2012 at 6:01pm

College Physics
A radio station with a power of 20 kW sends out an omnidirectional wave at 1.25 MHz. a. If the electromagnetic wave has an electric field of 0.22 V/m, what is the magnetic field amplitude? b. What is the intensity of the wave at 5 km? c. What is the wavelength of the ...
Wednesday, April 4, 2012 at 9:25pm

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