Questions Asked on
March 6, 2010

Physical Science
How many meters away is a cliff if an echo is heard 0.500 s after the original sound? Assume that sound traveled at 343 m/s on that day.
asked by Julie 
Physical Science
A rock thrown straight up climbs for 2.50 s,the falls to the ground. Neglecting the air resistance, with wat velocity did the rock strike the ground?
asked by Julie 
Data Management
How many different sums of money can be formed from one $2 bill, three $5 bills, two $10 bills, and one $20 bill? the answer at the back of the book is 23, but i don't know how to solve it.
asked by John 
English
Explain how The Federalist Papers would have been more or less successful if newspapers had been printed monthly (rather than daily or weekly).
asked by Betty 
Math
I have a bar graph that shows the number of students by major in the College of Arts and Science. Math shows 200 students History shows 300 students English shows 400 students Science shows 150 students Other shows 175 students What percent of students in
asked by Carrie 
math 61
write an equation and solve A rectanglar swimming pool has width of 25 feet and an area of 1250 square feet. What is the pool's length?
asked by jeri 
Physical Science
How much would 80.0 kg person weight (a) on Mars, where the acceleration of gravity is 3.93 m/s2, and (b) on Earth's Moon, where the acceleration of gravity is 4.63 m/s2?
asked by Julie 
physics
a tank of ideal gas is sealed off at 20 degrees C and 1.00 atm pressure. What will be the pressure (in kPa and mmHg) in the tank if the gas temperature is decreased to 35degrees C ? the book answer is 82kPa = 6.2 x10^2 mmHg can you help me figure out how
asked by phyllis 
physics
A positive point charge = 2.1×10−5 is fixed at the origin of coordinates, and a negative point charge = −5.4×10−6 is fixed to the axis at . abeer abdullah Part A Find the location of the place along the axis where the electric field due to these
asked by sami 
trig math 30
Find the exact value of cos 8 degrees cos 38 degrees + sin 8 degrees sin 38 degrees
asked by Sandy 
math
find a formula that gives the maximum number of enclosed regions formed by n lines
asked by nancy 
Global History
What were some of the restrictions that Hitler placed on German Jews? is the answer prohibited from marrying non jews, attending German schools, and practing law.
asked by Katherine 
Physical Science
A cubic tank holds 1,000.0 kg of water. What are the dimensions of the tank in meters? Explain your answer.
asked by Julie 
calculus
Find the limit for the given function. lim t>0 (sin(8t))^2/t^2
asked by Zoey 
Physics (Heat Engines)
21. A heat engine operates in a cycle between temperatures 700 K and 400 K. The heat input to the engine during each cycle is 2800 J. What is the maximum possible work done by the engine in each cycle? (A) 1200 J (B) 1600 J (C) 2100 J (D) 2800 J (E) 4400 J
asked by Kate 
Chemistry
I was given a question on an assignment and I can't figure it out. The question is A student collects 90ml of oxygen gas over water at 25c and a total pressure of 99.3kPa from the decomposition of KClO3. 2KClO3(s)> 2KCl(s)+ 3O2 a) How many mols of O2 were
asked by Krissy 
CHEMISTRY
When powdered milk is added to water, is it a coarse suspension, true solution, or colliodal dispersion? What about baking soda in water?
asked by KATIE 
chemistry
How much ethyl alcohol (C2H5OH) must be added to 1.00 L of water so that the solution will not freeze at 4°F?
asked by ray 
Biology
Match the terms with the appropriate descriptions. Digestive Excretory Skeletal Circulatory Nervous Respiratory Reproductive _______________________ A. coordinate body activitiesnervous B. Removal of waste productsexcretory C. Body support and
asked by mysterychicken 
statistics
What is the expected value (expected profit) of producing an all weather tire?
asked by joe 
Math
Use the rules of exponents to simplify each exponential expression. Your result cannot contain any negative exponents. Thank you for your help. (2m^2)^3 (4x^2y^4z^7)^0
asked by Elizabeth 
math
A cyclist bikes x distance at 10 miles per hour and returns over the same path at 8 miles per hour. What is the cyclist's average rate for the round trip in miles per hour? ( please help me ! )
asked by thommini 
Calculus
What's the integral of e^(1+i)x dx? Please provide the full solution because I don't understand how to do this question at all.
asked by Jackie 
calculus
find the derivative of y= 3secx/tanx
asked by Zoey 
chemistry
How many milliliters of .50 M NaOH solution are required to titrate 40.0 mL of a 0.10 M H2SO4 solution to an end joint?
asked by lacey 
algebra
The weight of an object follows the equation w=Cr^2, where C is the constant and r is the distance the object is from the center of the earth. a. solve the equation for r. b. Suppose the object is 100 pounds when at sea level. Find the value of C that
asked by Carson 
algebra
The equation D=1.2times square root h gives the distance, D, in miles a person can see to the horizon from a height, h, in feet. a. sovle for h. b. Long's Peak is 14,255 feet in elevation. How far can you see to the horizon for Long's Peak? Can you see
asked by Carson 
Physical Science
Find the resulting acceleration from a 300 N force that acts on an object with a mass of 3,000 kg.
asked by Julie 
math
find a polynomial with integer coefficients such that square root of 3 + square root of 5 is a root of the polynomial
asked by nancy 
chemistry
how much ethyl alcohol must be added to 1.00l of water so that the solution will not freeze at 4f
asked by me 
English
Punctuate the following sentence and underline the explanatory words. There are 13 mistakes. misty could you walk ms millers dog on tuesday mom asked
asked by Taylor 
Data Management
How many different sums of money can be formed from one $2 bill, three $5 bills, two $10 bills, and one $20 bill? the answer at the back of the book is 23, but i don't know how to solve it.
asked by John 
PHYSICS
In the early 1900s, Robert Millikan used small charged droplets of oil, suspended in an electric field, to make the first quantitative measurements of the electron’s charge. A 0.67umdiameter droplet of oil, having a charge of +e, is suspended in midair
asked by JOTHEY 
Chemistry
I'm doing an intro to organic chem, and i'm looking at the functional groups of organic compounds. More specifically, I am looking at melting/boiling points. I keep reading that one has a greater m/b pt. than another, but another one has a greater m/b pt.
asked by Jeff 
Physics
An airfilled parallel plate capacitor has a plate separation of b = 0.58 cm, and an area A = 280 mm2. Find its capacitance
asked by Susie 
Algebra
Question 1 Solve using the multiplication principle then graph. 15>75 Question 2 Translate to an equality. Use the variable x. The number of people in the chess clubi less than or equal to 15. Question 3 Solve using the addition and multiplication
asked by Queen D 
math
A) Give the digit in the 14th decimal place in 1.3875 B) Wirte 3.5030303...in raised bar notation
asked by Anonymous 
Mechanics of Materials
A railroad is laid so that there is no stress in the rails at 20 degrees celcius. Calculate the stress in the rails at 6 degrees celcuis if all the contraction is prevented. Take E=206GPa and linear coefficient of expansion is 12 x 10^(6) /deg celcius.
asked by Claire 
science
how does air pressure affects the outer space
asked by Pamela 
maths
22. A motor boat whose speed is 18 km/h in still water takes 1 hour more to go 24 km upstream than to return downstream to the same spot. Find the speed of the stream
asked by kaur 
medical
describe how microscopictomacroscopic body approach can be used
asked by crissy 
chemistry
I am doing a home lab experiment about acidbase neutralization. I just need a little help to see if I am doing it correctly. I completed the experiment and recorded the data. We were to add 25 ml of vinegar and the 1 ml of cabbage indicator, the add i ml
asked by Lynn 
math
Find a polynomial with integer coefficients such that (sqrt3 + sqrt5) is a root of the polynomial
asked by nancy 
microeconomics
On balance, is the patent system a good or bad thing? explain.
asked by ronie 
microeconomics
is government involvement in scientific research a good idea? discuss
asked by ronie 
Physics
Any dielectric material other than vacuum has a maximum electric field that can be produced in the dielectric material before it physically or chemically breaks down and begins to conduct. This maximum electric field is called dielectric strength. The
asked by Susie 
Physics
A simplified model for an erythrocyte is a spherical capacitor with a positive inner surface of area A and a membrane of thickness b. Use potential difference of 86 mV across the membrane and a dielectric constant K = 5.0. If the capacitance of the
asked by Susie 
Physics
A rectangular piece of gold is 3.8 cm long and 2.5 cm wide. How deep is the piece when it displays a resistance of R = 1.35 μω for a current that flows along the depthdirection?
asked by Susie 
algebra
what is x squared plus 12x plus 11 equals
asked by Jerry 
math
3 sqrt of 45
asked by april 
Chemistry
If the radiation of an automobile contains 12L of water, how much would the freezing point be lowered by addition of 5 kg of prestone (glycol, C2H4(OH2))? How many kg of zerone (methyl alcohol, CH3OH) would be required to produce the same result? assume
asked by ray 
Quick Opinion
Which sounds better? How many of you have known someone that has attempted or completed suicide before? or How many of you have known someone that has attempted or taken their own life from suicide before?
asked by Courtney 
Math
1. Should the census figures be adjusted for the undercount? If so, how? If this solution introduces errors of its own, estimate how large they are, compared to the undercounts. 2. What method should Congress select for apportioning the House of
asked by David Earnest 
law and ethics
what 2 types of depositions may be taken prior to a medical lawsuit
asked by linda 
speech
SAMPLES OF SEND FORTH SPEECHES
asked by IBRAHIM 
Science/Energy
I need to write a paper on why saving energy would benefit us. The paper will be sent to Congress so I need really good reasons! Any websites that can help?
asked by Sam 
mathematics
How do you determine the range of the following relations given the domain? a) x x+3, x = 0, 1, 2, 3 b) x 1/2 x x= 2,1,0,1,2 c) x 2x, x= 2,1,0,1,2
asked by Shequana 
Thermodynamics
5 pounds of an ideal gas with R=38.7 and K=1.668 have 300Btu of heat added during a reversible constant pressure change of state, initial temperature=80°F. Determine: a.)the final temperature b.)change of internal energy change of enthalpy change of
asked by Janus 
chemistry
The Burning MG in CO2 reaaction had deltaG=746 kJ/mol at 298K. Calculate the equilibrium constant for this reaction.
asked by Rachael 
Biology
1. Sponges a. are nonsymmetrical and have oscula b. lack organization into tissues and organs but have specialized cells c. possess cells that are capable of recognizing other sponge cells and have a simple digestive system d. both a and b I'm so confused
asked by mysterychicken 
algebra
f(x)=4x what is relative maxima and minima
asked by christina 
statistics
Assume that Acme Tires sells their high performance tires for $180 each and their all weather tires for $135 each. Further assume that the cost of producing a high performance tire is $150 and the cost of producing an all weather tire is $120. Finally,
asked by joe 
computer
can someone tell me the three threats in computer and their threat agents and associated vulnerabilities and countermeasures.
asked by arham 
statistics
blanking on formula for this question: 1038 people polled; 540 said yes. what % said yes?
asked by michelle 
computers
Think about how your computer compares to a state of the art system.
asked by lavoria 
English
What is the difference in academic papers and memos? How does it affect the tone and structure of the two papers? Im stuggling with this assignment. Please help.
asked by Joe 
Algebra
1. Compute the slope of the line containing each pair of points. a) (3,7) and (4,7) b) (2,7) and (2,9) c) (5,3) and (1,7) Here is what I got. a) 0 b) undefined c) 10/4 reduced to 5/2 Correct?
asked by Marco 
Algebra
3. Find the slope of each line with equation as given. a) Y=4 b) X=2 Answers: a) zero b) undefined 4. Graph the following equations: a) 3x2y=6 answer: (2,0) and (0,3) b) 5x+3y=6 (need help with this one) Are they correct and would need help with b.
asked by Marco 
chemistry
Br is larger than Cl,yet the two atoms have identical axial destabilization energies. Why?
asked by bun 
algebra
How do I solve for r in this equation. I can't remember what to do with the negative exponent. w=Cr^2
asked by Carson 
Algebra 2
List the possible rational roots of the following equation x^4+3x^28x+10=0
asked by Sean 
Math
How would you expand 2.34 x 10^7 and 1.7 x 10^12
asked by Natalie 
Calculus
Find an equation of the tangent line to the curve at the given point. (Assume the tangent line form to be f(x) = mx + b.) y= e^x/x (1,e) I got m= 0 nd b=e could anyone tell if its right?
asked by Zoey 
Macroeconomics
Can someone please explain this question to me? I have tried to pick out the key points but even then I do not know what to look up. Your bank is developing a marketing campaign to appeal to new customers. In a meeting, your manager asked the following
asked by Brenda 
Biology
There are some people whose salivary amylase is partially inactive or even absent. Are they handicapped in any way? Is salivary amylase essential for starch digestion?
asked by Anonymous 
math 30 Trig
A central angle subtends an arc of 35 cm. If the radius of the circle is 12 cm, what is the measure of the central angle?
asked by Sandy 
Investments Analysis
Can anyone help with ANY of these? Any good starting points would be great! Alpha (STI) 0.90 2008 Return(STI) 15% Beta(STI) 1.20 2008 Return(INX) 10% R_squared 36% Risk Free Rate 4% Variance(STI) .1296 b. What is the relative volatility (variability) of
asked by James 
math
how many zeros is in 2010!(2010 factorial)?
asked by nancy 
window XP
Which of the following aspects of the Windows XP architecture prevents a failing application from affecting other applications and the operating system itself?
asked by John 
Math
How do you write these in scientific notation? 5,700,000,000 0.000000059
asked by Heather 
Middle school Math
Graph 3y4=11 by finding intercept(s) How do you do this... Thanks
asked by Jeff 
Math
Describe the method of graphing by using intercepts?
asked by Lilian 
college
how can i make informative speech give me guideline for that.. you can send me answer at mu id.
asked by pankaj 
spanish
what is an interrogative word
asked by laron 
Physics
∆L = á Lo ∆T (25.054 cm  25.000 cm) = á (25.000 cm)(102°C  25°C) .054 = a(1925) 1925/.054 = 35648.14 Did I solve the equation correctly?
asked by Hannah 
Ancient China
What tool did the ancient China people use to try to communicate with the dead?
asked by Angel 
math 30 Trig
If sin theta = 7/8, then the value of 1/cot theta in the interval 3pi/2
asked by Sandy 
geo
what is china's absolute location??
asked by anna 
Biology
1. Sponges a. are nonsymmetrical and have oscula b. lack organization into tissues and organs but have specialized cells c. possess cells that are capable of recognizing other sponge cells and have a simple digestive system d. both a and b I'm so confused
asked by mysterychicken 
PreCal
Approximate the equation's soultions in the interval (o, 2pi). If possible find the exact solutions. sin 2x sinx = cosx I do not know where to start.
asked by Abby 
Global History
What racial and nationalistic ideas did Nazis promote?
asked by Katherine 
KEYBOARDING AND WORD PROCESSING
Which of the following is correctly capatalized? (a Sincerely Yours (b Anatomy And Physiology (c Dear Mr. Welby (d Ladies and gentlemen
asked by ANNE 
Global History
im not sure what is the question asking. Both Stalin and Hitler instituted ruthless campaigns against supposed enemies of the state. Why do you think dicators need to find scapegoats for their nations's ill?
asked by Katherine 
5th grade science
Describe the function of the lungs in the circulatory system.
asked by PEYTON 
grade five science
why do you think it would be very dangerous to lose a quart of blood in an accident?
asked by PEYTON 
physics
given 1000 mL of helium at 15degrees C and 763mmHg, determine its volume at 6degrees C and 420 mmHg. my friend said she got 1.68 x 10^3 mL help, I have no idea how she got it
asked by phyllis 
Intro Chemistry
I am reviewing my test and I having trouble figuring out the answer to the following question: List the following element symbols in order of decreasing exothermic electron affinity: Al, Ca, As _______>________>________ I wrote: Al>As>Ca (I got it wrong) I
asked by chem 
Physical Science
A hot dog bun (volume 240cm3) with a density of 0.15g/cm3 is crushed in a picnic cooler into a volume of 195cm3. What is the new density of the bun?
asked by Julie 
Math 61 Algebra
A person's hair length is proportional to the number of years it has been growing. After 2 years a person's hair grows 8 inches. The longest moustache on record was grown by Sain of India. Sain grew his moustache for 17 years. How long was each side of his
asked by jeri 
Physical Science
What was the average speed in km/h of a car that travels 400.0 km in 4.5h?
asked by Julie 
Physical Science
What is the acceleration of a car that moves from a speed of 5.0 m/s to a speed of 1 m/s during a time of 6.0s?
asked by Julie 
PreCal(Please help)
Approximate the equation's soultions in the interval (o, 2pi). If possible find the exact solutions. sin 2x sinx = cosx I do not know where to start.
asked by Abby 
Physical Science
A rocket moves through outer space at 11,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 380,000 km?
asked by Julie 
statistical application
The first class in a relative frequency table is 5059 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?
asked by Susan 
english
i have to write a critical lens about this quote: "To provoke dreams of terror in the slumber of prosperity has become the moral duty of literature". by Ernest Fisher what does the quote mean?
asked by Leslie 
Maths
what are the ordered pairs for the function f(x)= 5 4x, if the values of x are between 2 and 4
asked by Shequana 
Computer
This problem is a base conversion problem masquerading as a "word problem". You are responsible for controlling the stage lights at a small theater. The control box has control switches for 10 separate lights, and each switch can make its corresponding
asked by David 
chemistry
One has 100.0 grams of water and 45.0 grams of ice in a flask at 0 C. (a) what is the total volume?
asked by Anonymous 
Algebra
1. Write the equation of the line with the given slope and yintercept a) m=3/8 and b=6 Answer: y=3/8x +6 b) m=2 and b=11 Answer: y=2x+11 c) m=0 and b=6 Answer: y=x+6 Correct?
asked by Marco 
economics
I need points and counterarguments on how globalization helps farmers in third world countries for my debate. I know that it opens up trade and has technological developments to create more efficient farming. But that's almost all I can think of.
asked by Sandra 
programming
A small startup software developer company needs to create a program that will calculate the pay of its employees. For the first version of the program, the company wants the program to accept an employee’s name, the number of hours the employee worked,
asked by Wayne 
English
Can someone help me check these sentences,please? Thank you in advance. 1)His fingers produced a music similar to (can I use "like") the sound blown into a glass. 2)A simile is a stated comparison between two things through (and not "with") the use of
asked by Franco 
science
what is the human perception of how much energy a sound wave carries?
asked by Kimberly 
trig 30
What is the period of the function y =sin x/4?
asked by tye 
A &P
How are muscluar movement, bone growth, an nerve transmission interrelated.
asked by Nala 
Biology
1. Sponges a. are nonsymmetrical and have oscula b. lack organization into tissues and organs but have specialized cells c. possess cells that are capable of recognizing other sponge cells and have a simple digestive system d. both a and b I'm so confused
asked by mysterychicken 
Calculus ( finding limits)
Find the limit as x>inf (x+2)^(3/2)+1 I know that the answer is infinity but I don't know how to get this answer by hand. Could someone please help me? Thanks a lot!
asked by Jess 
Oxidation State
Give the oxidation sate for the monoatomic cobalt species whose electron configuration is the following:[Ar]4s0 3d6 Is the answer +3? Thank you!
asked by chem 
calculus
find the derivative of g(y)= (y^2/(y+3))^3
asked by Zoey 
calculus
Find the derivative of the function. (y^2/(y+3))^3
asked by Zoey 
Physics
A uniformly charged sphere has a potential on its surface of 410 V. At a radial distance of 20 cm from this surface, the potential is 150 V. The Coulomb constant is 8.99 × 109 N · m2/C2.What is the radius of the sphere? Answer in units of m.
asked by Mari 
Computer Data Analysis
How to apply the concepts of readability,reusability,and reliability in the use of spreadsheets.Do you think these really matter in the workplace? How about charting?
asked by Vanessa 
chemistry
In Millikan's experiment, the charge on each drop of oil was measured in coulombs. Imagine the same experiment, but with charges measured in a fictitious unit called a zeet (Z). Drop Charge (Z) A 8.40×10−15 B 1.96×10−14 C 2.24×10−14 D
asked by Syeda 
physics
ok so dr= 2i + 3j while F= 5i + 2j It wants me to find the work. now i know w=Fxdr. what i want to know is why when you take the dot product of both, you get a different answer compared to when you just multiply the magnitudes.
asked by Mitch 
Maths
Its the old rabbit colony question using simultaneous linear and quadratic equations  and I need help: A colony of rabbits is growing so that the total number of rabbits (R) after number of weeks (t) is shown: on this table. t=5 R=140, t=10 R=200, t=15
asked by LivviC 
Global Studies
In a DBQ essay, do you give reference to the documents you used at the end of the paragraph? Or do you reference them at the end of a sentence in the middle of your paragraph? Thanks!
asked by Sarah 
physics
A person swings a 0.33 kg tether ball tied to a 5.4 m rope in an approximately horizontal circle. (a) If the maximum tension the rope can withstand before breaking is 11 N, what is the maximum angular speed of the ball? I figured out the rest of the
asked by John 
health & biology
why is abstinence the main focus of STD prevention education?
asked by dominique 
Physics
What's the tangential acceleration of a freely swinging pendulum when it makes an angle θ with the vertical?
asked by Max 
chemisty
I have to convert the following pressures into torr: 1. 2.48x10^3atm 2. 4.75x10^6atm 3. 7.60x10^6 i have no idea how to convert it when there are scientific notations involved. please help =]]
asked by bb 
Physics
A space station is shaped like a ring and rotates to simulate gravity. If the radius of the space station is 120 m, at what frequency must it rotate so that it simulates Earth's gravity? [Hint: The apparent weight of the astronauts must be the same as
asked by Max 
Data Management
Determine the number of ways of selecting four letters, without regard for order, from the word: parallelogram the answer at the back of the book is 150, but i can't seem to find out how to do this.
asked by John 
math
A)if a sum invested dains 10% each yr, how long it will take to duoble its value? B)if an object depreciates in value by 10% each yr, how long will it take until only half of the original value remains? C)why aren't these two answers (A & B) the same? D)is
asked by Anonymous 
Chemistry
I have to convert the following pressures into torr: 1. 2.48x10^3atm 2. 4.75x10^6atm 3. 7.60x10^6 i have no idea how to convert it when there are scientific notations involved. please help =]]
asked by bb 
Intermediate English
What similarities do you see in these two processes?
asked by lola