# Questions Asked onMarch 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.

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?

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.

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).

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

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?

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?

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

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

10. ## trig math 30

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

11. ## math

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

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.

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.

14. ## calculus

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

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

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

17. ## CHEMISTRY

When powdered milk is added to water, is it a coarse suspension, true solution, or colliodal dispersion? What about baking soda in water?

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?

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

20. ## statistics

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

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

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 ! )

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.

24. ## calculus

find the derivative of y= 3-secx/tanx

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?

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

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

28. ## Physical Science

Find the resulting acceleration from a 300 N force that acts on an object with a mass of 3,000 kg.

29. ## math

find a polynomial with integer coefficients such that square root of 3 + square root of 5 is a root of the polynomial

30. ## chemistry

how much ethyl alcohol must be added to 1.00l of water so that the solution will not freeze at -4f

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

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.

33. ## 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 0.67-um-diameter droplet of oil, having a charge of +e, is suspended in midair

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.

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

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

37. ## math

A) Give the digit in the 14th decimal place in 1.3875 B) Wirte 3.5030303...in raised bar notation

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.

39. ## science

how does air pressure affects the outer space

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

41. ## medical

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

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

43. ## math

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

44. ## microeconomics

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

45. ## microeconomics

is government involvement in scientific research a good idea? discuss

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

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

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?

49. ## algebra

what is x squared plus 12x plus 11 equals

3 sqrt of 45

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

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?

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

54. ## law and ethics

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

55. ## speech

SAMPLES OF SEND FORTH SPEECHES

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?

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

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

59. ## chemistry

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

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

61. ## algebra

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

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,

63. ## computer

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

64. ## statistics

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

65. ## computers

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

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.

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?

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.

69. ## chemistry

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

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

71. ## Algebra 2

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

72. ## Math

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

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?

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

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?

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?

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

78. ## math

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

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?

80. ## Math

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

81. ## Middle school Math

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

82. ## Math

Describe the method of graphing by using intercepts?

83. ## college

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

84. ## spanish

what is an interrogative word

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?

86. ## Ancient China

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

87. ## math 30 Trig

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

88. ## geo

what is china's absolute location??

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

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.

91. ## Global History

What racial and nationalistic ideas did Nazis promote?

92. ## 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

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?

Describe the function of the lungs in the circulatory system.

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

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

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

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?

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

100. ## Physical Science

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

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?

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.

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?

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?

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?

106. ## Maths

what are the ordered pairs for the function f(x)= 5- 4x, if the values of x are between -2 and 4

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

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?

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?

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.

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,

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

113. ## science

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

114. ## trig 30

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

115. ## A &P

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

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

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!

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!

119. ## calculus

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

120. ## calculus

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

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.

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?

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

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.

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

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!

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

128. ## health & biology

why is abstinence the main focus of STD prevention education?

129. ## Physics

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

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 =]]

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

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.

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