Questions Asked on
March 17, 2011

phyics
Who will hear the voice of a singer firsta person in the balcony 50 m away from the stage (Fig. 2219), or a person 2000 km away at home whose ear is next to the radio? Assume that the microphone is a few centimeters from the singer and the temperature is

Spanish
Choose the sentence which correctly says "The king doesn't like to smoke." A. Al rey no le quiere fumar. B. Al rey no le gusta fumar. C. El rey no gusta fumar. D. El rey no quiere fumar.

Physics
Two men decide to use their cars to pull a truck stuck in mud. They attach ropes and one pulls with a force of 972 N at an angle of 28 degrees with respect to the direction in which the truck is headed, while the other car pulls with a force of 1401 N at

arithmetic
use the geometric mean to find the 7th term in a geometric sequence if the 6th term is 50 and the 8th term is 18

Calculus (pleas help!)
Find the slope of the tangent line to the ellipse x^2/36 + y^2/49 =1 at the point (x,y). slope =_______ Are there any points where the slope is not defined? (Enter them as commaseparated orderedpairs, e.g., (1,3), (2,5). Enter none if there are no such

Personal Income Tax
Here is my homework problem that I need some help with: "A taxpayer is considering selling 100 shares of stock. The current market price is $7,500. Which shares should the taxpayer instruct the broker to sell, and what are the tax consequences of this

Anonymous
Maya is going to rent a truck for one day. There are two companies she can choose from, and they have the following prices. Company A charges and allows unlimited mileage. Company B has an initial fee of and charges an additional for every mile driven. For

Physics
Find the amount of heat required to convert 10g of ice to steam at 110 degree Celsius.

education
what is the difference between reconstructionism, pragmatism, progressivism, behaviorism, essentialism, and perennialism

geometry
The measure of a single angle in a regular octagon is (4x + 12)°. Find the value of x. Show equations and all work that leads to your answer.

english
I need to find this article named "relationship skill critical for building professional relationship" and write 2pgs about it, however I cant seemed to find it online. can you plz tell me where I can find it. I apperciated it, thanks!

science
an aluminium container of mass 100g contains 200 g of ice at 20'c heat is added to the system at the rate of 100 cal/sec. what will be the final tmperature of the mixture after 4 min? given:specific heat of ice:0.5 cal/gm'c ,latent heat of fusion:80

Financial Data and Choosing stocks
Now that you’ve analyzed a company based on its financial statement, let’s compare two companies. Choose two related companies to answer the questions below (for example: Toyota & Honda, Apple & Microsoft). Questions: 1. What two companies did you

math
jake has 3/4 of a dollar. maxwell has 1/10 of a dollar. do they have more or less than $1.00 in all

math
hi i startted the problem below by writing a sigma notation of sigma[(2^(n+1))/((n+1)!)] QUESTION: how do i find the sum of 2+(4/2!)+(8/3!)+(16/4!)+... was my attempt wrong, or how do i go from here? thank you!

physics
A student sits at rest on a piano stool that can rotate without friction. The moment of inertia of the studentstool system is 4.6 kg m^2. A second student tosses a 1.5 kg mass with a speed of 2.9 m/s to the student on the stool, who catches it at a

physics
Suppose partial melting of the polar ice caps increases the moment of inertia of the Earth from 0.331MR^2 to 0.332MR^2. What is the change in length of day in seconds?

Computer Science
Babbling Brooks A series of streams run down the side of a mountain. The mountainside is very rocky so the streams split and rejoin many times. At the foot of the mountain, several streams emerge as rivers. Your job is to compute how much water flows in

physics
You know your mass is 69 kg , but when you stand on a bathroom scale in an elevator, it says your mass is 78 kg. What is the magnitude of the acceleration of the elevator?

geometry
A company logo is shaped like an equilateral triangle with 2in.long sides. What is the height of the logo? Round to the nearest tenth.

Math
Miles said that he measured an angle of a regular polygon to be 130 degress. Explain why this result is impossible.

physics
The engine weighs 4500 newtons and it is lifted 1.5 meters up by the block and tackle system. The mechanic must apply a force of 225 newtons while pulling a total of 37.5 meters of chain through the block and tackle pulley system. What is the work done by

Chemistry
Describe the dynamic equilibrium that exists in the two water tanks?

biology/science
when an indigestion tablet is placed in water, carbon dioxide is given off. describe the test for carbon dioxide.

differential equations
solve the differential equation by seperation of variables 5. y'=xy/2ln y

chemistry
Name the following compounds (with absolute configurations) and are they enantiomers, diastereomers or structure isomers or no relation at all? img34.imageshack.us/i/namethese.jpg/ i think they are disteromers and their names are 1] 1S, 2S  (2bromo  3,4

Calculus!!!
Find the (x,y) coordinates of the infection point on the graph of f(x)=900/1+(5e^x) Use your calculator to give your answers using 2 decimal place accuracy. Please help me!!!!!!! You don't know how much it means to me!! Thank you!

Calculus
Find the intervals where the function f(x)=((2x1)^2)(x3)^2 is concave up and concave down and find all inflection points. Give decimal answers using two decimal place accuracy. Please help me!!! I really don't understand! and please show your work so

Statistics
In planning a family of 4 children assume boys and girls are equally likely on each birth. Find (i) the probability distribution (ii) the expected number of boys (iii) the standard deviation of the number of boys.

world history
The ancient Chinese phrase, "Mandate of Heaven" is most similar to the concept of

Chemistry
human blood contains dissolved carbonc acid in equilibrium with carbon dioxide and water according to the reaction: h2CO3(aq)CO2(aq)+H2O(l) explain why decreasing the concentration of Co2 will ultimately decrease the concentration of H2CO3.

chemistry
a process stream containing acetone vapour in nitrogen enters a cooler compressor at 65 degree celcius and 1 atm, with relative saturation of acetone equal to 50%. the gas is compressed and cooled to 20 degree celcius to recover 95% of acetone as a liquid.

chemistry
calculate the mass of silver chloride and dihydrogen monosulfide formed when 85.6g of silver sulfide reacts with excess hydrochloric acid.

Psychics
A freight car is moving freely along a railroad track at 7.0 m/s and collides with a tanker car that is at rest. After the collision, the two cars stick together and continue to move down the track. What is the magnitude of the final velocity of the cars

Physics Pls help~review for test!
A 10.0 kg box is pulled along a horizontal surface by a 40N force which is applied at a 30.0 degree angle. If uk = 0.3, calculate the acceleration of the box.

chemistry
Gasahol is a fuel containing ethanol(C2H6O) that burns in oxygen (O2)to give carbon dioxide and water. a)How many moles of O2 are needed to completely react with 4.0 moles of C2H60? b) If a car produces 88g of CO2,how many grams of O2 are used up in the

physical science
As the number of carbon atoms in the compound increases, what pattern do you see in the boiling points? What general pattern do you see in the melting points?

scifi
wats da moon phases for the past 10 days

science
helium gas, 3.0 x 104 g dissolved in water, express this concentration in parts per million.

MATH
A circle is centered at (2, 5) and has radius 3. Write its equation in standard form.

math
hi i startted the problem below by writing a sigma notation of sigma[(2^(n+1))/((n+1)!)] QUESTION: how do i find the sum of 2+(4/2!)+(8/3!)+(16/4!)+... was my attempt wrong, or how do i go from here? thank you!

physics
I'm making a graph of force vs stretch for springs. I have 7 data trials with the k (F = kx) ranging from 28 to 31, average is 29.6. Now I need to find the slope and write an equation for the graph. If I use the first two points to get the slope, I get a

algebra
y=x9 what is the solution

algebra
Use the five steps for problem solving to answer the following question. Please show all of your work. The volume of a rectangular slab of concrete needs to exceed 72 cu. ft. If the length is 12 feet and the width is 8 feet, how thick does the concrete

inequality
Janice and Leonard together would like to save more than $3,500. They have saved $425 saved so far. Janice can save $120 more than twice what Leonard can save each month. How much money will they each need to save to reach their goal?

Second Grade Fractions
4/6 of 18 is ?

social studies
How did the industrial revolution affect ri today

amet
PART A 1. The acceleration of a body along a straight line is given by (a = 2 (ms3) t 10 (ms2). Initial position is 1.8 m and initial velocity is 15 ms1. Determine the position of the particle, the total distance travelled and the velocity after 12

geometry
A rectangle has a diagonal 20 inches long that forms angles of 60 and 3o with the sides. Find the perimeter of the rectangle.

Chemistry
EEG, PET, and TMS are all: (Points: 5) laboratory observations that introduce experimenter bias into the study. descriptive methods for studying the brain. standardized methods for studying the brain. experimentally controlled technologies for brainwave

math
riddle:double my tens digit to get my ones digit. double me and i am less than 50.

physical sciece
aA player uses a hockeey stick to incease the speed of a 0.200 kg hockey puck by 6 m /s in 2 seconds. (A)How much dd the hockey puck accelerate? (B)How much force was exerted on the pack? (C)How much force did the puck exert on the hockey stick.

math
What would the measurements be using the 1/4 in.= 9 ft to represent a 27 ft square?

probability
A jar contains 3 red balls and 2 green balls. You draw one ball at random. Determine the probability of selecting a. red b. green c. blue d. red or green

Science
A car of mass 900kg moves at 10 m/s. what is the braking force required to stop the car in a time of 5 seconds?

math
twofifths of the voters already prefer candidate x. if he took money from a political action committee to buy television time, a third of those who do not now prefer him would be convinced to vote for him. But he would los the support of a fifth of those

algebra
what is the simplest radical for for 6 time root 72

marketing
kidly please can anyone help me to give an idea about this question for my subject since i could not explain well.thank you so much. what does it mean publics demand to elaborate.... q.distinguish betwee consumer and publics demand. i just want to have an

English
Can you please help me complete the fillintheblank activity, please? I'm not sure if the rules in America are the same as in England. 1)You can get a parttime job when you are 15 years old. You can ride a 50cc moped when you are 14 years old. You can't

algebra 2
Solve the following for the variable x. (7/x2)+(1/x+2)=(3x/x^24) Thank you.

Math
What is the circumference of a circle that has a radius of 70ft?

Physics
The center of a 1.50 diameter spherical pocket of oil is 1.20 beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is 800 kg/m^3.

algebra 2
The stopping distance d of a car after the brakes are applied varies directly as the square of the speed r. If a car travelling 70mph can stop in 270ft, how many feet will it take the same car to stop when it is travelling 60mph? Thank you.

science
A 500 kg truck moving at 30 m/s strikes a parked 300 kg car. They connect together and move forward. (A) What kind of collision is this (elastic or inelastic)? (B) What is the momentum of the truck before it strikes the car? (C) What is the speed of the

Physics
What would be the orbital speed and period of a satellite in orbit 0.88 multiplied by 108 m above the Earth? Orbital Speed___m/s Period___s Thanks!

Geometry
The sum of the measures of the angles of a polygon with n sides is given. Find n. 32) 180 33) 1080 34) 1980 35) 2880

computer science
Should the navigation elements in multiple locations on a page be identical? Why or why not?

Geometry
To name each figure below, use as many of the letters A, B, C,...as you need, in order, starting with A. For each figure, how many letters do you need? With this labeling, how many different ways can you name the figure? a. a triangle b. a quadrilateral c.

Geometry
A triangle has two congruent angles and an exterior angle with measure 100. Find two possible sets of measures for the angles of the triangle.

Functions
Could someone please tell me the answer to this ques; (ln 243  ln 18.3)/6=?

chemistry
A 2.30 mole quantity of NOCl was initially in a 1.50 L reaction chamber at 400°C. After equilibrium was established, it was found that 20.0 percent of the NOCl had dissociated: 2NOCl(g) 2NO(g) + Cl2(g) Calculate the equilibrium constant Kc for the

elemenatry ed
Are there any absolutes regarding rights and wrongs in the K–8 educational setting?

8th grade Math
This fourleaf clover consists of four coplanar circles. Each circle is externally tangent to two others, as shown. The two smaller circles are congruent, and the two larger circles are congruent. A square is constructed such that each of its four vertices

calculus
solve the differential equation by seperation of variables 3. dy/dx=e^(2x)/4y3

8th grade Math
Another fourleaf clover also consists of 4 coplanar circles. The large circular leaves are externally tangent to each other, as well as to each of the smaller circular leaves, which are also congruent to one another. The radius of the large and small

math
(2r+s)14sr= 28rs

8th grade math
Albert has a home screen printing business. He has designed a bracelet and T‑shirt for St. Patrick’s Day which both use a special ink, available for a limited time from his supplier. Albert has already begun taking and fulfilling orders for

math
(2r+s)14sr= 28rs

arithmetic math
if b=15 and c=6700 and b= 17 and c=7500 what is c if b=0

precalculus
suppose g(t)=kf(t). Find the average rate of change of g over the interval [a,b] in terms of f

Calculus
The function f(x)=(x^4)(10x^3)+(18x^2)8 is continuous on the closed interval (1,8). Find the absolute minimum and maximum values for the function on this interval. Please help me!!! And please show your work so that i understand!! Thank you!!

Calculus!
For the function y=(e^2x)+(3x)(10), use Newton's method and the calculator method to find the x value for which y=15. Please show your work so that I can understand the question! Thank you so much!! it means alot!!

math
The property restoration company puroserv is considering switching to new dehumidifiers. Their market research considering the cost of the new machines and their efficiency tells them that's them switch would give them an 80% chance of making a 20, 000

Biology
Please help with this, What was it important to have a detailed growth curve for your test plant (which was a Lemna spp.) sample on a frequent basis grown under control conditions without a test chemical?

Science
How do you reverse the expirement of a Iron Nail which is placed into a cup of Copper Sulfate????

math
mean 18,25,32 answer:25

physical
the density of mercury is 13.3 g cm3. what is its D in kg m3 and standard form?

math
mean 18,25,32 answer:25

English
Though I specialized in Germanic languages, I need to present (in a very simple way using a very simple language) some scientific topics in English to Italian 18yearoldstudents (studying applied sciences) whose English is very poor. I'm seeking internet

English
Is that correct to say: If he were she (or in her place) , h'd get a racer? Thank you very much fr your help and information!

science
rosie tried to use a maganet to stick a memo on to her mirror it would'nt stick. explain why!

math
median: find 3% of 80 answer:2.4

geometry
In the parallelogram above, line segment AE equals 12 mm. Line segment BE equals 16 mm. What is the length of line segment CD in the parallelogram above?

physics
A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 3.0 rad/s2. (a) How long does it take the discus thrower's speed to get to 4.5 rad/s? (b) How many revolutions does the

History
My question was pretaining to the culture of the 1920's. I need to the question answered in what ways did the automobile change American culture during the 1920's? Henry Ford came out with the Model T and how was he able to succeed to a degree far beyond

Differential equation Math
Find the general solution of the following system of equation? Please help, i don't know what to do... dx/dt = 3x +2y +2z dy/dt = 5x  4y  2z dz/dt = 5x + 5y +3z.

cis 115
So what logic is used when pseudocoding compound conditions

statistics
A population is normally distributed with a mean of 40 and a standard deviation of 6. For samples of size 10, what is the probability that the sample mean will be more than 42?

Math
A 8 cubic rectungle

BIOO pleasee help u guys are angellss!!!
why is there no production of ATP when detergent is treated in a test tube with mitochondria? in Aerobic and anaerobic respiration what is the final metabolic breakdown of molecule? 1 pyruvic acid 2 acetyl coenzyme A 3 citric acid 4 reduced coenzyme FADH2

English  Native speakers
Need some explanations about the articles! Why do we say I love Italian food and not the Italian food Why do we say I leave home at 3 and not I leave the home why do we say I go to bed at 11 and not I go to the bed at 11

chemistry
calculate the molecular formula of a compound with vapor density of 30 having 40% carbon, 6.67% of hydrogen and the rest is oxygen.

NU
The end of a thin glasswall tube with an inside diameter of 1mm is inserted into a reservoir of pure water with a temperature of 25 degree C. What is the surface tension (adhesoin) force on the water inside the tube? To what height will the water rise in

math
simplify 4+17+(29) + 13 + (22)+ (3)

math
simplify 4+17+(29) + 13 + (22)+ (3)

English project question.
I'm doing a English project on Sir Thomas More, and I had to make a movie maker project, so we have a choice of what music to play. The movie maker project is all about his life, teachings, and his writings, basically. What song should I use? Or any idea

physics
10 k r point g point degree

physics
work is being done when a force: a) is exerted while pulling a wagon up a hill b) acts vertically on a cart that can only move horizontally c) is exerted by one team in a tugofwar when there is no movement d) of gravitational attraction acts on a person

art
i need to check these answers please ome one help me i need them to graduate...please please... Questions 1–20: Select the one best answer to each question. 1. Which of the following hotel rates is generally available to business travelers? A. The family

chemistry
What volume will 73g of dry ammonia gas occupy at 11 degrees C and 720 mm HG? How uch air is needed to dilute the ammonia to 10ppm?

math
d/dx(e2x3)find indicated derivative and simplfy

Math
What is the formula for the area of a triangle and trapezoid?

history
I need help writing an acrostic poem about benjamin franklin

calculus
y'=xy/2ln y how do you solve the differential equation by seperation of variables

statistics
A random sample of n=36 scores is selected from a population. Will this have a definite normal distribution?

Microeconomics
You own the Wizard of Oz on DVD. The opportunity cost of watching this DVD for the second time: A) is zero. B) is one half the cost of the DVD, as this is the 2nd time you have watched it. C) is the value the alternative use of the time you spend watching

calculus
an airplane flying due east at 400 km/h pasess over an airport 12 minutes before a second plane flying south 30 degrees west at 500 km/h.if the airplanes are at the same altitude how fast will they by seprating when the seccong pane is over the

microecon
Y= consumption X= Disposable income Y X 5,000 10,000 A 8,000 20,000 B Refer to info above. The slope of the line between points A and B is: A) .3 B) 2.3 C) 3.3 D) indeterminate from this information. How do you figure this out. What is the math to

Calculus (pleas help!)
For what values of k is lim x > INF coshkx/sin2x finite? (Enter your answer as an interval or list of intervals, for example, (infinity,3], (5,7). Enter none if no values of k will work.) Please help..

calculus help.Pleaseee(thankyou guys for helping
Your Open QuestionShow me another » Calculuss homeworrk heelp? A rocket is being tracked from a radar post that is 10 km from the launch pad.the rocket arises vertically at a height of 17.32 km and then turns at an angle of 30 degrees fron the vertical

Gr.11 Chemistry
Is this right? Balanced: 3 Mg(s) + 2 Al(NO3)3(aq) = 2 Al(s) + 3 Mg(NO3)2(aq) Total Ionic Equation: 3 Mg(s) + 2 Al +3 (aq) + 6NO3 1 (aq) = 2 Al(s) + 3 Mg+2 (aq) + 6NO3 1 (aq) Net Equation : 3 Mg(s) + 2 Al +3 (aq) = 2 Al(s) + 3 Mg+2 (aq)

math
Marissa has budgeted $65 for her mothly cell phone expense. If her plan with her wireless provider is $15 plus $0.25 for each minute, how many minutes can she talk on her cell phone in a month and not exceed her budget?

economics
what does most economists believe about the future of business cycles?

english
what would be a disillusionment using setting in the Great Gatsby?

Psycology
Psychology and Health Problems Paper

Social Studies
Does the following, need any changes. I yes what are they: Have you ever noticed that the most important man in America every day when you are shopping, looking through your wallet, and even going to the bank? Well…the most important man in America is

Financial Data and choosing stocks
5. Click on the Show Chart link to the right of the company name and description. Select the monthly share price graph and take a screen shot. Include the screen shot in your submission. Describe what has happened to the share price in the last year I

math
the perimeter of a paved area being built at a playground is going to be 46 meters. if the length and width are each a whole number of meters, what should the length and width of the area be to cover the greatest possible area? draw a picture and make an

Math
Is this statement true or false? The following proportions will yield the same results: x/2=4/9 and 9/2=4/x

physics
How far will a car moving at 50 miles an hour travel in the time it takes to sneeze?

chemistry
find the concentration of HCL if the pH of the solution is 0.50

Calculus! Please Help!!
The dollar value of a stock x weeks after a change in management is give by the function: f(x) = x²14x+30ln(x+1)+32, 0≤x≤7. Find the intervals when the value of the sock was increasing and also determine the maximum value of the stock during this

physics
I need formula/problem set ups for the following 2 problems: 1)Find The work done by the force in pulling an object on an inclined plane from A to B (ground level to top): Length of incline (like a hypotenuse): 30 m Height of incline (y axis): 10 m Force =

Calculus! Please help me!
A person on a bicycle is 100 meters west of a person in a car. the person on the bike starts to ride at 8 meters per second directly east and at the same time the person in the car starts to drive directly north at 18 meters per second. Write the distance

social studies
where are the major wheatproducing areas of the world

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

English
Can you please check these ideas on stress and young people, please? Thank you vey much for helping me finding an excellent site on science!! 1) The two things teenagers are most stressed about are how to make new friends and how to improve their school

English
1. I have not made up my mind yet. 2. I have not decided yet. 3. I have not determined yet. 4. I have not made a decision yet. 5. I have not made a determination yet. (Are they all the same?)

Soc120
I have to write a paper and I am short of words. Maybe you can help me? I am stuck on some consequences of modernization? Is there anyway you can give me some examples that I can write about? Thank You,

social studies
how much wheat is produced by the countriesthat produce the most wheat

probability
A jar contains 3 red balls and 2 green balls. You draw one ball at random. Determine the probability of selecting a. red b. green c. blue d. red or green p.s: the reason I am asking this questions is because we never learned about it in class and I don't

world history
Among early hunting and gathering peoples, the commonly occurring mark that looks like a "P" is thought to stand for a

biology /help
. The hemophilia gene is located 12 map units from the redgreen colorblindness gene on the X chromosome. Redgreen colorblindness is recessive to normal color vision. A woman with normal blood clotting and normal color vision, but whose father was a

chemistry
How many mL of 5.00% (w/v) solution are needed to make 100mL of physiologic saline (0.90%(w/v) sodium chloride)?

Physics
An equilateral triangle 100.0 m on a side has a m1 = 15.00 kg mass at one corner, a m2 = 75.00 kg mass at another corner, and a m3 = 120.00 kg mass at the third corner. Find the magnitude and direction of the net force acting on the 15.00 kg mass.

math
Jerry has 76 quarter.How much dollars do he has? I said the answer is either $19.00 or $76.25 which one is correct Thank you

PHYICS
Two 0.64 kg basketballs, each with a radius of 13 cm, are just touching. Ignore any other gravitational interactions. (a) How much energy is required to change the separation between the centers of the basketballs to 1.0 m? in J (b) How much energy is

math
how to do a problem solving stratigy of making a table/find a pattern

math
how to do a problem solving stratigy of making a table/find a pattern

math
how to do a problem solving stratigy of making a table/find a pattern

Email question
Is there any way I could email a tutor and send them a copy of my essay so they can proofread it for me?

english grammar
please help me if my letter is correct in the grammar. kindly help me to make a good letter. march,21,2011 subject:sales commission to: THE MANAGER DEAR SIR, SIR,I AM WRITING YOU DUE TO NEXT WILL BE MY ANNUAL VACATION AND I WOULD LIKE TO ASK A FAVORABLE

chemistry
If a car produces 88g of CO2, how many grams of O2 are used up in the reaction?

chemistry
what is the concentration in percent volume of 60mL or methanol in a total volume of 500mL

geometry
find the surface area of the figure below. A cylinder which has a hemisphere on one side of cylinder and radius is 5 and the hight is 8.

english grammar
please help me if my letter is correct in the grammar. kindly help me to make a good letter. march,21,2011 subject:sales commission to: THE MANAGER DEAR SIR, I am writing to you due to next month will be my annul vacation and,I would like to ask a favorale

PHYSICS
As part of a daring rescue attempt, the Millennium Eagle coasts between a pair of twin asteroids, as shown in the figure below where d1 = 2.97 km and d2 = 1.49 km. The mass of the spaceship is 2.57 107 kg and the mass of each asteroid is 3.15 1011 kg. If

Health Care
Why is it when ever someone ask for help someone thinks they are cheating? If I wanted to cheat I would let soeone else do the work. All I want is a formula or example to follow so I can figure this out for myself!!!!!

math
what percent is 14 of 132

Maths
Find the nine values for x ( in radians) with 0=/< x

Spanish
I have to write a basic paragraph describing myself for Spanish class. I have translated it several times on several different sites, but I'm still not sure if it is correct. Something seems wrong.. I would greatly appreciate any corrections. My name is

Calculus (pleas help!)
For what values of k is lim x > INF coshkx/sin2x finite? (Enter your answer as an interval or list of intervals, for example, (infinity,3], (5,7). Enter none if no values of k will work.) Please help..

PHYSICS
A proton is traveling to the right at 231 km/s. It has a headon perfectly elastic collision with a carbon atom. The mass of the carbon atom is 12 times the mass of the proton, what is the speed of proton after the collision?

algebra
What is 4,756 divided by 32? I got 148.625 please confirm?

PHYSICS
Two objects are connected by a massless string as shown in the figure below. The pulley is massless and rotates without friction. The object of mass m = 1.7 kg slides without friction on an inclined plane which makes an angle of è = 38° with the

physics
30N 60degrees horizontal and vertical components

PreCalculus
what is the range of each of these equations? 1. 4sin(3x1)+4 2. 4sin(3x+1)4 3. 2sin(1.5x+.5)+2 4. 2sin(1.5x.5)2

BIOO
why is there no production of ATP when detergent is treated in a test tube with mitochondria? in Aerobic and anaerobic respiration what is the final metabolic breakdown of molecule? 1 pyruvic acid 2 acetyl coenzyme A 3 citric acid 4 reduced coenzyme FADH2

Biology
why is there no production of ATP when detergent is treated in a test tube with mitochondria? in Aerobic and anaerobic respiration what is the final metabolic breakdown of molecule? 1 pyruvic acid 2 acetyl coenzyme A 3 citric acid 4 reduced coenzyme FADH2

Social Studies
Have you ever noticed that the most important man in America every day when you are shopping, looking through your wallet, and even going to the bank? Well…the most important man in America is our 1st president George Washington, and he is on our one

economics
Explain why economic policies aimed at stabilization can actually increase, rather than decrease, the magnitudes of economic fluctuations.

business law
If you were forming a business entity and had no intent to go public (sell stock on the stock exchanges), what form would you use and why?

algebra
Is this statement true or false? It is possible to solve a variation problem without a constant of proportionality.

algebra
Is this statement true or false? The constant of proportionality, k, in the direct variation model y=kx is the slope

Chemistry
We're learning about single displacement reactions. What happens when Mg + Zn two nitrate reacts? And when Al + Zn two nitrate reacts? Are there colour changes or precipitates formed?

trigonometry
what is the diameter of three circle inscribed in a triagle whose base is 50 cm.

chemistry
The temperature of a 4.00 L sample of gas is changed from 10.0 C to 20.0 C. What will the volume of this gas be at the new temperature if the pressure is held constant?

algebra
Find the values for the following function: f(x)=3x+5 a)f(3) b) f(x) c)f(x) d)f(x3) e)f(x+a)

music/voice
how can i learn to sing like the concordia choir on my own

thank you,write teacher for helping my letter
thank you very much.

English
Can you please help check these sentences I wrote about adjective and past participles. Thank you. 1)I'm as pleased as Punch. 2) Your project is excellent.I'm pleased/happy/satisfied/content (are they all synonyms, did I include all?). 3) This song is so

algebra
Brandon is buying a car. The monthly payment p for the car varies directly with the amount borrowed b. Suppose that the dealership tells him that if he borrows $15,000, her payment will be $293.49. What would be her payment if she borrows $18,000? (round k

algebra
x=3/2y+5 2x3y=8 How would you solve

algebra
Which of the following are liner? Explain a) y + 2/3x b) y=1/x c) y=x(to the second power)+8x+15

please help me
The hemophilia gene is located 12 map units from the redgreen colorblindness gene on the X chromosome. Redgreen colorblindness is recessive to normal color vision. A woman with normal blood clotting and normal color vision, but whose father was a

Chemistry/Elements
What is needed to have Nitrogen and Lithium react?

Social studies
What was so important about Ghana? If anyone can help,thank you(:

Improving your Voice
What are some good methods to improve on your voice? Ive heard that drinking green tea is good for your voice, and drinking water is also good, anything else?

English
Can you please help me formulate the questions better and answer the last two yourself? Thank you very much. 1) I quarrelled (argued) with my best friend because I refused to let her copy the maths test (from mine?). 2) She is cross/furious with me now.

math
A gun is fired from a bunker of 2m deep with an initial velocity of 500m/s at an angle of pi/6 a) Find the parametric equations of the position of the projectile b) Find the range of the projectile to the nearest meter. c) Find the maximum height of the

geometry
a globe of the earth measures 12 inches in a diameter. calculate the surface area and volume of this globe

chemistry
hello, I am trying to find an answer for cooling H2O2 in synthesis of hexaamminecobalt(III) chloride but did not cooled H2O2 for the synthesize pentaamminechlorocobalt(III) chloride..

science
what material reflects the least amount of sunlight ?

chemistry
you must prepare 300 mL of .750M NaBr solution using 2M NaBr stock solustion. how many mL of stock solution should you use?

math
+15 + 20=

trigonometry
please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

pyschology
The outlawing of slavery and extending voting rights to women seem to indicate that ethics can have beneficial results.

trigonometry
please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

chemistry
hello, I am trying to find an answer for cooling H2O2 in synthesis of hexaamminecobalt(III) chloride but did not cooled H2O2 for the synthesize pentaamminechlorocobalt(III) chloride..

trigonometry
please me to answer this question.because i will pass this coming monday march 21,2011.fin the diameter of three circle inscribed in a triangle. whose base is 50 cm.

english
The American Dream in the Great Gatsby through the use of setting? Please write one example. I thought the parties was one.

chemistry
In order to dilute 1L of 6M solution of NaOH to .5M solution, how much water must be added?

math
express 4ez^2(4ez)as a binomial

English
Hello. Please help me to choose the correct word order: 1)equivalentlacking English neologisms; 2)English equivalentlacking neologisms. Meaning: new words which have no equivalents in other languages. Thank you very much.

calculus
solve the initial value problem by separation of variables dy/dx=y^(2)+1, y(1)=0

4th grade math
Find a rule that gives the third number from the first two numbers. Fill in the blanks.....10, 4, 5, ? 15, 7,7, ? 19,9,?

chemistry
determine the quantity of NaOh whose percentage is 15 % to balance 176 g of H2SO4

math
find all numbers that divide 100 with a remainder of 4. what is the largest 2digit divisor that can divide 100 and still have a remainder of 4? find all #'s that divide 216 with a remainder of 6.

Chemistry
when sulfur is burned in the presence of oxygen, sulfur trioxide is produced. if 3.4 x 10^24 atoms of sulfur react, how many liters of sulfur trioxide are produced?

Algebra
Factor completely and then place the factors in the proper location on the grid. 4y2 + 25y + 6

computers
You’re as IS professional, and your boss has asked you to prepare a briefing for senior staff on the comparative advantages and disadvantages of three competing tape drive technologies: Digital Linear Tape (DLT), Advanced Intelligent Tape (AIT), and

Algebra II
I first want to make it clear that I have only taken Geometry, Algebra I, and preAlgebra. That seemed to clear things up last time. Question: Matt bought a car at the cost of 25,000 dollars. This car's value goes down 15% every year. 1. What is the decay

math
32 is _____ % of 100? 3 is 5% of what number?

Grammar
If you want to wait, Ms Hobson will meet with you in a few minutes. What is the infinitive "to wait" in this sentence? Is it a noun, adjective or an adverb?

english
the characters nat hocken from the story "the birds by,Daphne du Maurier" and general zaroff from "the most dangerous game by, Richard Connell" must overcome internal foes as well as external monsters list and explain each character's internal conflicts.

English
I left out the questionnaire I really need you to check. I have to refer to what happens in America. 1)You can get a parttime job when you are..You can ride a 50cc moped when you are......You can't leave school until you are......You must be ......to join

AN UNCERTAIN HORIZON
At the Yalta Conference of 1945, the military situation favored A. Stalin. B. Churchill. C. Eisenhower. D. Roosevelt.

Physics/Chemistry
How do I understand what Quantum Dots are? I read Wikipedia, but the description seems a little over my head? Can I get a simpler explanation of this? or a pointer to some where I can read this?

Spanish
La class de matematicas/la class de arte/tan interesante como

Engish
I'm finding it difficult to write the instructions for a strawberry salad. (Can you say it in English)? Thank you very much for your help. 1) Remember the most common nonreflexive verbs in English through this story. 2) Which are considered as low marks

materials engineering
for: prismatic noncircular section channel which used for window frames and for ducting for electrical wiring..I need to know : 1function 2objective 3constraints how can we select the materials for this design, and why? what suitable processes for

US History
Hello! I have an assignment where I have to rewrite the Bill of Rights in modern english. I've been able to do most of them, but I'm stumped on the 9th amendment. "The enumeration in the Constitution of certain rights shall not be construed to deny or

physics
You are pulling your sister on a sled to the top of a 20.0 m high, frictionless hill with a 10.0° incline. Your sister and the sled have a total mass of 50.0 kg. You pull the sled, starting from rest, with a constant force of 127 N at an angle of 45.0°

algebra
a roof rises 1.3 feet vertically and 13.1 feet horizontally. wgat is the grade of the roof?

English
I forgot to include the following words. Thank you.I need help for the questionnaire, too 1)Which household chores are most popular among American teenagers? Can you see if I wrote them right? (put the rubbish out, sweep and mop the floors, take the bed

general
A tragedy hits a small town. The elementary school explodes into flames trapping several classes of second graders. Because the volunteer fire department will take too long to get there, teachers and classified staff remove all the children to safety

marketing
Please refer to the following advantages and disadvantages: Advantages Little capital outlay Some control of operations Risks are shared and limited Local knowledge Disadvantages/Potential problems Limited contact with customers No direct control of

Science
The brain can be studied by using: (Points: 5) electrical, biochemical, and magnetic means. radio frequencies, computers, and neurotransmission. neurotransmitting, electrical, and biochemical means. biochemical, neurotransmitting, and magnetic means. i