# Questions Asked onMarch 25, 2007

1. ## Physics

A wheel with rotational inertia I is mounted on a fixed, fricitonless axle. The angular speed w of the wheel is inccreased from zero to w_f in a time interval T. 1: What is the average net torque on the wheel during the time interval, T? a) w_f/T b)w_f/T^2

2. ## Physics

A spring has a force constant of 100N/m and an unstretched lenght of .07 m. One end is attached to a post that is free to rotate in the center of a smooth table. The other end is attatched to a 1 kg disc moving in uniform circular motion on the table,

3. ## Physics

An ideal massless spring is fixed to the wall at one end. A block of mass M attached to the other end of the spring oscillates with amplitude A on a frictionless, horizontal surface. The maximum speed of the block is V_m. The force constant of the spring

4. ## Physics

When a block slides a certain distance down an incline the work done by gravity is 300 J. What is the work done by gravity if this block slides the same distance up the incline? a) 300 J b) zero c) -300 J d) It cannot be determined without knowing the

5. ## chemistry

I need help with a,b,and c. I tried to balance it but im having a little trouble Ethane gas, C2H6, burns in air and produces carbon dioxide and water vapor. a)write a balanced equation for this reaction. I know this isnt balanced but is this what im

6. ## Chem

A bottle of win contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is .79 g/mL. Calculate the concentration of ethanol in wine as mass percent and molality. I calculated molality as 2.4 m/kg, but I'm stumped on the mass percent [although I'm

7. ## chemistry

consider the reaction 2HgCl2 + C2O4-2 ---> 2Cl2-1 + 2CO2 + Hg2Cl2 The initial rate of this reaction was determined for several concentrations of HgCl2 and C2O4-2 and the following rate data was obtained. TRIAL (1) [HgCl2](M)= .105 [C2O4-2](M)= .15 RATE=

8. ## Chem

The only stable isotope of fluorine is fluorine-19. Predict possible modes of decay for fluorine-21, fluorine-18, and fluorine-17. Would it just be alpha-particle production, beta-particle production, gamma-ray production, and positron production for all

9. ## science

what's the difference between inexhaustible resources and renewable resources. HELP charges come together (7 letters) attract renewable resources are those that can be "renewed" as in we use trees for the wood but we can replant trees and regrow wood to

10. ## Physics

To streatch a certain nonlinear spring by an amount 2x requires a force F given by F=40x-6x^2 where F is in newtons and x is in meters. What is the change in potential energy when the spring is stretched 2 meters from its equilibrium position? a)16 J b)28

11. ## Physics

A ball is tossed straight up from the surface of a small spherical asteroid with no atmosphere. The ball goes to a height ewual to the asteroid's radius and then falls straight down towardd the surface of the asteroid. What forces if any act on the ball

Cost of Debt. Olympic Sports has two issues of debt outstanding. One is a 9 percent coupon bond with a face

13. ## Physics

A target lies flat on the ground 3m from the side of a building which is 10m tall. A student rolls a ball off the horicontal roof of the building in the direction of the target. Air resistance is negligible. Te horizonal speed with which the ball must

14. ## Math

A license plate is to consist of two letters followed by three digits. How many different license plates are possible if the first letter must be a vowel, and repetition of letters is not permitted, but repetition of digits is permitted? The first position

15. ## science

Which of the following is NOT found in animal cells? a. cell wall b. cell membrane c. organisms d. prokaryotes I think the answer is cell wall, but I'm not sure. Cell walls are only found in plant cells as far as I know. yes, a

A bus leaves a station at 1p.m. traveling west at an average rate of 44 mi/h.one hour later a second bus leaves the same station traveling east at a rate of 48mi/h. At what time will the two buses be 274 miles apart I know that I am suppose to use d=r*t

17. ## history

In 1860 what concerns were brought about during Lincoln's Presidency? The attempt of the South to secede from the Union was the main convern. This erupted into the Civil War one year later, when Union forces were attacked at Fort Sumter, South Carolina.

18. ## Chemistry

From this equation, how many glocose does the human body consume ineach minute? If gram per mole is 180.16. The human body needs at least 0.0103 mole O2. Equation C6 H12 O6 + 6O2-->6CO2 +6HO2 How many glucose what? grams? moles? tons? Mext, the human body

19. ## chemistry check

1)A pocket of gas is discovered in a deep drilling operation. The gas has a temperature of 480c and is at a pressure of 12.8 atm. What volume of gas is required to provide 18.0 L of gas at the surface where the conditions are 22 C and 1.00 atm? is this

20. ## Financial analysis-Need by tomorrow please!!!!!!!!

If the risk-free rate is 6 percent and the expected rate of return on the market portfolio is 14 percent, is a security with a beta of 1.25 and an expected rate of return of 16 percent overpriced or underpriced?

21. ## Physics - KE/rotation

In Figure 11-32 (which shows a ball at the top of an incline, at the bottom of the incline a loop begins with radius R and Q a point on the loop lined up with the center of the loop), a solid brass ball of mass m and radius r will roll without slipping

22. ## Physics - KE/Inertia

The rigid body shown in Figure 10-66 (it is a triangle with the upper mass = to M and the bottom two corners/masses equal to 2M. The bottom side length equals .70 cm with point P in the middle of the side and the other two sides equal .55 cm) consists of

23. ## Accounting

Your friend has just come home from their job at a hamburger shop feeling really good because their boss said that they worked so well they were a real asset to the company. Using the definition of an “asset” explain whether your friend would meet the

24. ## english

"Talk is cheap until you hire a lawyer." Can someone please explain to me how this is an example of punch line? That is called "satire". Anyone can talk and talk all they want to, no cost! just energy and air is all that is required. BUT, when a lawyer is

25. ## World History

What are some modern examples of cultural blending in art? Consider music, literature, painting etc.. I can't find any info for this topic and I have to write a 1 page report. Possibly one of these artists would make a good topic: Frieda Kahlo

26. ## Algebra

The diameter of a circular pizza pan is 16 inches. What is the area, to the nearest tenth, of the pan? pi*r2 = area r = diameter/2 201.1 in. squared looks good to me.

27. ## Chemistry

Determine the concentration of each type of ion in O.100M solutions of each of the following compounds. a. KBr b. Rb2S c. CuCl2 d. Mg(NO3)2 If someone could just even explain what they are asking for and how to do the problem, I would greatly appreciate

28. ## Physics

The position of a toy locomotive mobing on a straight track along the x-axis is given the equation x=t^3-6t^2 +9t where x is in metters and t is in seconds. The net force on the locomotive is equal to zero when t is eqaul to a) zero b)2 s c)3 s d)4s e)5s

29. ## math

One card is selected at random from a standard 52-card deck of playing cards. Find the probability that the card selected is a red king. 1 out of 26, There are 2 red kings in 52 cards so it would be 2 / 52 and then you sipmlify to 1 / 26

30. ## MATH!

The ratio of two supplementary angles is 2:7. What is the measure of the smaller angle? Can anyone help me with this--i don't understand it. The angles add to 180, so 2x + 7x=180 solve for x, then the smaller angle is 2x Supplemental means adds to 180

31. ## history

What does this quote mean? Who does it refer to? and What kind of government does it refer to? Thank you for using the Jiskha Homework Help Forum. You need to type the quote so we may see it! Otherwise we can't help you. "A government responsive to the

32. ## Math

A license plate is to consist of two letters followed by three digits. How many different license plates are possible if the first letter must be a vowel, and repetition of letters is not permitted, but repetition of digits is permitted? For the first

33. ## algebra

I invest \$14,000, part is 15% and part is 2% if the total interest at the end of the year is \$1060, how much did I invest at 15% I think you mean that part (let'say x) earns 15% and the rest earns 2% Solve thes two equations simultaneously: x + y = 14,000

34. ## economics

True or False 1.Total output may continue to rise even though the marginal physical product (MPP) is decreasing Think about it, then take a shot. Hint: while MPP is decreasing, can it sign still be positive?

35. ## criminology

how is criminal behavior explicable according to rational choice theory? It would be helpful if you phrased your questions in regular English and explained your terms. explicable ??? rational choice theory ??? ?? question pertains to the rational choice

36. ## Water solubility chemistry

What solvent that would dissolve Ethanol in water? You mean selectively dissolve the ethanol out of the water? Ethanol is soluble in water, at least last night when I had wine, it was dissolved. I don't know of anything that selectively absorbes ethanol

I need to know aboout christianity,judaism and islam THNX :) Christianity http://www.religioustolerance.org/christ.htm http://www.bbc.co.uk/religion/religions/christianity/ Judaism http://www.jewfaq.org/toc.htm

38. ## math , help,algebra

i am up to this point in my problem but i don't know what to do next with it can someone show me. Directions: Simplify by combining like terms x radical(18) minus 3radical(8x^2) these are the steps that i've done so far. = x radical (2*9) -3radical

39. ## Math

At an annual flower show, 6 different entries are to be arranged in a row. a) How many different arrangements of the entries are possible? b) If the owners of the 1st, 2nd, and 3rd place entries will be awarded prizes of \$100, \$50, and \$25 respectively,

40. ## science

Hi I have 2 questions I hope someone can help me :) 1)A pocket of gas is discovered in a deep drilling operation. The gas has a temperature of 480c and is at a pressure of 12.8 atm. What volume of gas is required to provide 18.0 L of gas at the surface

41. ## Math

In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and also

42. ## econ

my mind is going blank here..can someone chime in and help: If a new breakthrough in manufacturing technology reduces the cost of producing cd players by half, what will happen to the demand for cd players? Thank you for using the Jiskha Homework Help

43. ## history

What happens in the elections of 1824? Thank you for using the Jiskha Homework Help Forum. I would not say "what happens" but rather "what happened." Here are some links for you: 1. http://en.wikipedia.org/wiki/United_States_presidential_election,_1824 2.

44. ## Math

) In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and

45. ## chemistry

The experiment Water solubility, used three compounds Ethanol, Hexanol and Cyclohexene. Hexanol was unsoluble in water. suggest a solvent would dissolve this compound in water?

46. ## math

1000 tickets for prizes are sold for \$2 each. Seven prizes will be awarded – one for \$400, one for \$200, and five for \$50. Steven purchases one of the tickets. a) Find the expected value b) Find the fair price of the ticket. The expected value= 950/2000

47. ## Math help!

Place the following set of numbers in ascending order. -2/11, 5/8, 1/8, -1/9, 4/9 Well start by putting the most negative number first. 5/8 is bigger than 4/9. And 4/9 is certainly bigger tnan 1/9. Give it a try and I'll tell you if you get it right -1/9,

48. ## Chemistry

From this equation, how many glocose does the human body consume ineach minute? If gram per mole is 180.16. The human body needs at least 0.0103 mole O2. Equation BELOW. I really need this answer tonight please. C6 H12 O6 + 6O2-->6CO2 +6HO2 questions below

49. ## Biology

The human gene for the production of lactose is on chromosome 2. The dna nucleotide sequence of a small part from the middle is 123456789 TACTCGGAA I haVeTO WRITe DOWN THE EQVIVALENT SEQUENCE FOR MRNA AND HENCE WORK out the sequence of amino acids coded in

50. ## law

what does this mean? It takes a village to raise a child What impact does this have on juvenile justice system? http://en.wikipedia.org/wiki/It_Takes_A_Village You can find more references if you Google "it takes a village" (including the quotation marks).

51. ## math

If a student is selected at random, find the probability a)

52. ## Science

Why is an extra day added to February every four years? It is nice to have the calendar year the same as the Earth's orbit around the Sun. It takes 365 1/4 days to go around the sun...so, each four years, we add a day to correct the calendar. Thanks Bob!

53. ## dev psych

Can anyone guide me in coming up w/ a current developmental psychology topic? I'm thinking of the topic "designer babies"...I'm not sure this will be a proper topic. The teacher's assignment was general in nature. Thanks in advance.

54. ## math

If you roll a die many times, what would you expect to be the relative frequency of rolling a number less than 6? A) 2 out of 3

55. ## Physics

The velocity of a projectile at launch has a horizontal component v_h and a vertical component V_V. Air resistence is negligible. When the projectile is at the hightest point of its trajectory, which of the following show the vertical and horizontal

56. ## Algerba 1

What is the square root of 125? 5 * squareroot5 how do u sigh up

57. ## math

can someone help me ? If you roll a die many times, what would you expect to be the relative frequency of rolling a number less than 6? A) 2 out of 3

58. ## History

waht were some of the problems of 1800s england? Here are some sites that may be of help: http://www.fordham.edu/halsall/mod/modsbook20.html http://www.lkwdpl.org/lhs/england/ http://www.spartacus.schoolnet.co.uk/IRchild.main.htm

59. ## english/hamlet

i'm writing an essay on Hamlet comparing and contrasting the characters of Hamlet and Horatio. One of my paragraphs talks about the differences in their balance of character; Hamlet is unbalanced and dies, while Horatio is the ideal, balanced character who

60. ## algebra,help

I need help with these problems can someone show me how to solve them step by step.If anyone has time i appreciate it. Problem #1 Geometry. The length of a rectangle is 1 cm longer than its width. If the diagonal of the rectangle is 4 cm, what are the

how are data and information used within the human services organizations to support organizational planning? How can you plan for anything without having any data/information on the topic? The same is true of any organization. You need to know what your

62. ## Romeo and Juliet

Could you name some examples from West Side Story and Romeo and Juliet that are examples of these themes? Haste and lack of wise forthought bring about diaster The only way some people learn is through suffering Revengful acts are costly and often do

63. ## chemistry

What does the pH value for the tartaric acid solution suggest happens on dossolving a solid like cyclohexene? This must have something to do with an experiment you conducted or that you are geting ready to conduct. But you haven't told us enough to know

64. ## Math

On a credit card, minimum monthly payments are often about 2% of the balance. If no interest were charged, how long would it take to pay off a loan when payments are 2% of the balance? With no minimum, almost infinite time. Lets get to when he owes ten

65. ## Calculus

How can you factor x^4 +1? I need to factor by difference of squares. How can I do this? change it to x^4 - (sqrt(-1))^2 or x^4 - i^2

66. ## Spanish

Yo he encontrado y he oído de muchas personas inspiradores en mi vida. Sin embargo, nadie me ha inspirado más en mi vida que mi padre. oops that's not all of it...i'll post below I have met and heard of many inspirational people in my life. However, no

68. ## algebra

solve by substitution 3x-y = -7 x+y = -9 Substitute 3x+7 for y in the second equation, and solve the resulting equation for x.

69. ## history

Overall who is to remain above politics, is George Washington able to do this? Yes, George Washington didn't believe in political parties and remained above politics. For more information, check this site.

70. ## science

charges go away from, each other (5 letter word) repel

71. ## Math

An artist entered two paintings (Lighthouse and Old Cathedral) in a show. He feels that the probabilities are, 0.15, 0.18, and 0.11, respectively, that he will sell the Lighthouse, the Old Cathedral, or both. What is the probability that he will sell

72. ## science

where the current takes an unintended path (12 letter word) short circuit

73. ## Math

The table below shows the number of tests taken by 30 randomly selected college sophomores Number of tests taken

74. ## science

circuit is closed and electricity flows (8 letter word) complete

75. ## sciencie

hey i have a question what are the two requirements of mater and can matter exist at 0 kelvin yes, matter exists at 0 K, it's just really cold.

76. ## UofP

Forcasting Payments If firm pays it's bill with 30 day delay, what fraction of it's purchases will be paid for in the current quarter? In following quarter? What is it's payment delay is 60 day. 30 day 1/2, current all 60 day 1/3

77. ## MATH

How can you factor x^4 +1? If you go to the imaginary plane, it factors to (x^2 + i)(x^2-i) I need to factor by difference of squares. How can I do this?

78. ## Math

A jar contains 5 yellow marbles, 16 green marbles, and 8 black marbles. If one marble is selected at random, what is the probability that it is not green? 13 chances out of 16 (5/29*4/28)+(5/29*8/28)+(8/29*5/28)+(8/29*7/28)=39/203

79. ## Algebra

Wrtie an equation of a line passing through (6,10) and (6,-6 y= mx + b Put in the first set of points: 10=6m + b Do the same for the second point. Then, you have two equations, two unknowns. Solve by substitution.

80. ## hypotenuse

Identify the hypotenuse of a trinangle by fiving its letter I have no idea what you mean by "fiving its letter". Only right angle triangles have a hypotenuse. It is the side opposite the right angle, and is the longest side.

81. ## english

Can somone please give me an example of slapstick or a website? Thank you for using the Jiskha Homework Help Forum. First of all, a definition: 1. http://en.wikipedia.org/wiki/Slapstick Now slapstick comedy in the 1920's: 2. http://slapstick.lbox.org/

82. ## history

Who was the first President to be impeached? Thank you for using the Jiskha Homework Help Forum and here is the link for that answer: http://thelongestlistofthelongeststuffatthelongestdomainnameatlonglast.com/first189.html

83. ## Biology

A mutation of c to t in position 3 and another of G to A in position 7 results in the production of a different sequence of ammino acids work out the new sequence and suggest why it might change the function of the new protein I get the sequence of

84. ## science

a circuit that is open and electricity does not flow (a 10 letter word) incomplete

85. ## math

The table below shows the number of tests taken by 30 randomly selected college sophomores Number of tests taken

86. ## science

electrical flow (11 letters)

what do you think the advantages and disadvantages are to commision system of payment over the fee or incentive system? I need to compare the two of them.

88. ## chemistry

Reaction with Felings solution,if adding 2-butanol to potassium dichromate, in this experiment what spiecfic organic product would be form and structure.

89. ## Math

Can some one help me integrate (x^2 / (x^2 + x^4)) dx? Factor first: x^2+x^4= x^2(x^2+1) That will reduce with the numberator to INT (x^2+1)^-1 dx

90. ## science

Why don't perfect convection currents reach the North Pole from the equator? Land masses and other currents interfere.

91. ## psychology

say a group of students are studying for a test tommorow how can language acculturation hinder or help their study session and subsequent testing experiences? Thank you for using the Jiskha Homework Help Forum. By understanding the culture it will be

92. ## Algebra

how would f(x)=-2+-3 look like on a graph I assume you made a typo, and you meant to type f(x)=-2x+(-3) or f(x)=-2x-3 that would be a straight line with a y-intercept of -3 and a slope of -2

93. ## history

What does this quote mean? "A President can never be heedless (or neglectful) with public opinion" Thank you for using the Jiskha Homework Help Forum again. "a President must listen to what the public says."

94. ## math

30.9L = ? kL 45meters= .045km

95. ## science

two paths for the charges to follow (8 letters) parallel

96. ## sciencie

hey i have a question what are the two requirements of mater and can matter exist at 0 kelvin Didn't I answer this before? What do you mean by requirements? like what does it need like mass volume like what does it need like mass volume like what does it

97. ## math

If you roll a die many times, what would you expect to be the relative frequency of rolling a number less than 6? A) 2 out of 3

99. ## English

could someone please explain to me what idealism is? i think i know but i just need clarification. i've already looked it up several times but have gotten different answers. thanks! Thank you for using the Jiskha Homework Help Forum. Here is what the

Solve and graph(using words)the inequalities.Then describe the graphs using words. Example:x>5andx

101. ## science

flow of charges through the circuit (18 letters)

102. ## science

bddhsbkkhfdjkfnfnfgl gibberish (9 letters)

103. ## math b

if x is a ositive integer, 4x to the one hafl power is equivalent to? It is equal to twice the square root of the postive integer.

104. ## science

For the following crystals, explain how their melting points are related to the bonding forces and the crystal structure. a)Copper,Cu b)Water,H20 c)Sodium chloride,NaCl d)Diamond,C (Broken Link Removed)

105. ## Geography.

Think of yourself as a newspaper reporter at the site of an earthquake. You are reporting the damage. Describe in three or four sentences the kinds of destruction you observe. Plz help. Thanks. This site reports on the recent Japan earthquake.

106. ## science

a dry cell or power source (7 letter word) battery?

107. ## math

During the last hour, a telemarketer dialed 20 numbers and reached 4 busy signals, 3 answering machines, and 13 people. Use this information to determine the empirical probability that the next call will be answered in person. it is 13/20, unless he dares

108. ## science

circuit is open and electricity does not flow (10 letters)