Questions Asked on
March 6, 2010

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. trig math 30

    Find the exact value of cos 8 degrees cos 38 degrees + sin 8 degrees sin 38 degrees

    asked by Sandy
  11. math

    find a formula that gives the maximum number of enclosed regions formed by n lines

    asked by nancy
  12. 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
  13. 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
  14. calculus

    Find the limit for the given function. lim t-->0 (sin(8t))^2/t^2

    asked by Zoey
  15. 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
  16. 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

    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
  18. 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
  19. Biology

    Match the terms with the appropriate descriptions. Digestive Excretory Skeletal Circulatory Nervous Respiratory Reproductive _______________________ A. coordinate body activities-nervous B. Removal of waste products-excretory C. Body support and

    asked by mysterychicken
  20. statistics

    What is the expected value (expected profit) of producing an all weather tire?

    asked by joe
  21. 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
  22. 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
  23. 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
  24. calculus

    find the derivative of y= 3-secx/tanx

    asked by Zoey
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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
  31. 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
  32. 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

    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 0.67-um-diameter droplet of oil, having a charge of +e, is suspended in midair

    asked by JOTHEY
  34. 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
  35. Physics

    An air-filled parallel plate capacitor has a plate separation of b = 0.58 cm, and an area A = 280 mm2. Find its capacitance

    asked by Susie
  36. 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
  37. math

    A) Give the digit in the 14th decimal place in 1.3875 B) Wirte raised bar notation

    asked by Anonymous
  38. 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
  39. science

    how does air pressure affects the outer space

    asked by Pamela
  40. 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
  41. medical

    describe how microscopic-to-macroscopic body approach can be used

    asked by crissy
  42. chemistry

    I am doing a home lab experiment about acid-base 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
  43. math

    Find a polynomial with integer coefficients such that (sqrt3 + sqrt5) is a root of the polynomial

    asked by nancy
  44. microeconomics

    On balance, is the patent system a good or bad thing? explain.

    asked by ronie
  45. microeconomics

    is government involvement in scientific research a good idea? discuss

    asked by ronie
  46. 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
  47. 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
  48. 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 depth-direction?

    asked by Susie
  49. algebra

    what is x squared plus 12x plus 11 equals

    asked by Jerry
  50. math

    3 sqrt of 45

    asked by april
  51. 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
  52. 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
  53. 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
  54. law and ethics

    what 2 types of depositions may be taken prior to a medical lawsuit

    asked by linda
  55. speech


    asked by IBRAHIM
  56. 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
  57. 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
  58. 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
  59. chemistry

    The Burning MG in CO2 reaaction had deltaG=-746 kJ/mol at 298K. Calculate the equilibrium constant for this reaction.

    asked by Rachael
  60. 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
  61. algebra

    f(x)=4x what is relative maxima and minima

    asked by christina
  62. 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
  63. computer

    can someone tell me the three threats in computer and their threat agents and associated vulnerabilities and countermeasures.

    asked by arham
  64. statistics

    blanking on formula for this question: 1038 people polled; 540 said yes. what % said yes?

    asked by michelle
  65. computers

    Think about how your computer compares to a state of the art system.

    asked by lavoria
  66. 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
  67. 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
  68. 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) 3x-2y=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
  69. chemistry

    Br is larger than Cl,yet the two atoms have identical axial destabilization energies. Why?

    asked by bun
  70. 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
  71. Algebra 2

    List the possible rational roots of the following equation x^4+3x^2-8x+10=0

    asked by Sean
  72. Math

    How would you expand 2.34 x 10^7 and 1.7 x 10^-12

    asked by Natalie
  73. 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
  74. 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
  75. 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
  76. 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
  77. 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
  78. math

    how many zeros is in 2010!(2010 factorial)?

    asked by nancy
  79. 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
  80. Math

    How do you write these in scientific notation? 5,700,000,000 0.000000059

    asked by Heather
  81. Middle school Math

    Graph 3y-4=11 by finding intercept(s) How do you do this... Thanks

    asked by Jeff
  82. Math

    Describe the method of graphing by using intercepts?

    asked by Lilian
  83. college

    how can i make informative speech give me guideline for that.. you can send me answer at mu id.

    asked by pankaj
  84. spanish

    what is an interrogative word

    asked by laron
  85. 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
  86. Ancient China

    What tool did the ancient China people use to try to communicate with the dead?

    asked by Angel
  87. math 30 Trig

    If sin theta = -7/8, then the value of 1/cot theta in the interval 3pi/2

    asked by Sandy
  88. geo

    what is china's absolute location??

    asked by anna
  89. 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
  90. Pre-Cal

    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
  91. Global History

    What racial and nationalistic ideas did Nazis promote?

    asked by Katherine

    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
  93. 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
  94. 5th grade science

    Describe the function of the lungs in the circulatory system.

    asked by PEYTON
  95. grade five science

    why do you think it would be very dangerous to lose a quart of blood in an accident?

    asked by PEYTON
  96. 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
  97. 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
  98. 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
  99. 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
  100. Physical Science

    What was the average speed in km/h of a car that travels 400.0 km in 4.5h?

    asked by Julie
  101. 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
  102. Pre-Cal(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
  103. 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
  104. statistical application

    The first class in a relative frequency table is 50-59 and the corresponding relative frequency is 0.2. What does the 0.2 value indicate?

    asked by Susan
  105. 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
  106. 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
  107. 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
  108. 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
  109. Algebra

    1. Write the equation of the line with the given slope and y-intercept 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
  110. 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
  111. 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
  112. 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
  113. science

    what is the human perception of how much energy a sound wave carries?

    asked by Kimberly
  114. trig 30

    What is the period of the function y =sin x/4?

    asked by tye
  115. A &P

    How are muscluar movement, bone growth, an nerve transmission interrelated.

    asked by Nala
  116. 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
  117. 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
  118. 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
  119. calculus

    find the derivative of g(y)= (y^2/(y+3))^3

    asked by Zoey
  120. calculus

    Find the derivative of the function. (y^2/(y+3))^3

    asked by Zoey
  121. 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
  122. 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
  123. 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
  124. 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
  125. 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
  126. 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
  127. 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
  128. health & biology

    why is abstinence the main focus of STD prevention education?

    asked by dominique
  129. Physics

    What's the tangential acceleration of a freely swinging pendulum when it makes an angle θ with the vertical?

    asked by Max
  130. 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
  131. 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
  132. 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
  133. 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
  134. 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
  135. Intermediate English

    What similarities do you see in these two processes?

    asked by lola