# Questions Asked onOctober 9, 2009

1. ## physics

Is it possible to calculate the torque acting on a rigid body without specifying the origin?

2. ## Math

-14+26-37-45+56-67-71. ___? i don't know how to solve this so plz tell me this with solution. -12-(-24)+(-36) my answer is 0 but its wrong i cant understand tell me this with solution plz. Thanks

3. ## chemistry -drbob222

I'm not sure if my 1 and 2 are correct, and I don't know how to do 3, 4, and 5. Any help is appreciated! 1) You wish to extract an organic compound from an aqueous phase into an organic layer. to minimizing the number of transfer steps, would it be better

4. ## Chemistry

What is the percent yield of CO2 if the reaction of 10.0g of CO with excess O2 produces 12.8g of CO2?

5. ## Chemistry

Consider the following electron configuration. (σ3s)2 (σ3s*)2 (σ3p)2 (π3p)4 (π3p*)4 Select four species that, in theory, would have this electron configuration.

6. ## Chemistry

If 7.83 g FeCl3(s) is dissolved in enough water to make 2.50 L of solution, what is the concentration of Fe3+ in the solution?

7. ## Chemistry

The kinetic energy of a rolling billiard ball is given by {\rm{KE}} = 1/2\,mv^2 . Suppose a 0.17-{\rm kg} billiard ball is rolling down a pool table with an initial speed of 4.5 m/s. As it travels, it loses some of its energy as heat. The ball slows down

8. ## Chemistry

When 1 mol of a gas burns at constant pressure, it produces 2424 J of heat and does 6 kJ of work. How do i calculate delta E for this problem? I tried q+w but that didn't work for me. I got the answer wrong.

9. ## Chemistry

What is the mass of La2(C2O4)3*9H2O, can be obtained from 650mL of 0.0170 M aq solution of LaCl3 by adding a stoichiometric amount of sodium oxalate. I don't know how to balance the equation for this..i started: LaCl3+ Na2C2O4 -> La2(C2O4)3*9H2O + NaCl

31. ## grammar

In the following sentence select the compound predicate. We could study coins, see jewels, or examine tools. A. study,see B. could study, examine C could study,see, examine D study, see, examine Which of these is the correct answer. I think its D. I am not

32. ## Math

Use the common denominator method to solve 3/5 divided by 2/3

33. ## Physics

Suppose you want to take a chest X-ray with an X-ray source that has a divergence of 2^o . If the film is 1 meters from the (point) source, how big is the spot size at the film in centimeters?

34. ## physics

A person takes a trip, driving with a constant speed of 98.5 km/h except for a 21.0 min rest stop. If the person's average speed is 63.3 km/h, how much time is spent on the trip and how far does the person travel? How much time in hours and how far in km

35. ## MATH

determine if the fraction has a terminating decimal representations. (2^4)x(11^16)x(17^19) ------------------- (5^2) how would I do this?

36. ## sra J McGuin help please

Hi - I have about 15 mins to finish htis will you be on while i try to make the changes

37. ## Math

Use the missing factor method to find the quotient 3/5 divided by 2/3? What is the missing factor method?

38. ## physics

Is it possible for a car to move in a circular path in such a way that it has a tangential acceleration but no centripetal acceleration?

39. ## Physics

A hare and a tortoise compete in a race over a course 1.20 km long. The tortoise crawls straight and steadily at its maximum speed of 0.540 m/s toward the finish line. The hare runs at its maximum speed of 9.00 m/s toward the goal for 0.800 km and then

40. ## physic

Hi!Question:Two packing crates of masses m1 = 10.0 kg and m2 = 6.50 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 6.50 kg crate lies on a smooth incline of angle 45.0°. Find the acceleration of the

41. ## math

how many significant figures do the following numbers have? 1)0.023 2) 1000 3) 8120 4) 7.991 * 10^10 5) 0.00390 6) 9.010 * 10-2 7) 9.0 * 10^-3 8) 3.4 *10*4 9) 1090.00010. How is 1090.00010 written in scientific notation?

42. ## college

find an approxiamte value for the rate at which the moon orbits the earth. Assume that the moon's orbit is circular. the distance between the moon and earth is 382,000,000 meters.

43. ## math

Sam bought 1 of 250 tickets selling for $2 in a game with a grand prize of$400. Was \$2 a fair price to pay for a ticket to play this game?

44. ## it programming

design a program that models the worms behavior in the following scenario. A snake is moving towards a hole. Each time it moves, the snake cuts the distance between itself and the hole by its own body lengthuntil the snake is close enough to enter the

45. ## Algebra

Could someone please explain to me why the line x=4 is a vertical line. Thank you.

46. ## statistics

A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour fight is .02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the other will

47. ## math

How many batting lineups of the nine players can bemade for a baseball team if the catcher bats first, the shortstop second, and the pitcher last?

48. ## Algebra

plane ascends at a 40° angle. When it reaches an altitude of one hundred feet, how much ground distance has it covered? To solve, use the trigonometric chart. Round the answer to the nearest tenth.

49. ## Math

Use a different integer 1, 2, 3, or 4 for each of a, b, c, and d in the multiplication sentence a/b x c/d to make the greatest possible product. Where would I put the four integers 5, 6, 7, and 8 to make the greatest possible product? But then how would I

50. ## Math

A rotating videocamera in the parking garage goes through 4 complete rotations in 3/4 hour. How many rotations will it make in 1 hour? Would this be a two part solution?

51. ## Math Word Problem

At the 1988 Summer Olympics in Seoul, South Korea, Florence Griffith-Joyner ran the 100-meter dash in 10.49 seconds (a world record). What was her speed in miles per hour? (1 meter is approximately 39.37 inches.)

52. ## Alg 2 hon

An executive flew in the corporate to a meeting in a city 1500 km away. After traveling the same amount of time on the return flight, the pilot mentioned that they still had 300 km to go. The airspeed of the plane was 600 km/h. How fast was the wind

54. ## math

would 64974000345 be written 6.4*10^10 or 6.4974*10^10 2) how would you write 7.991*10-10 in scientific notation? 3) does 9.0 have 2 (sf) and 100.0000 have (7sf)?I'm confused about the trailing zeros when it comes to decimal points.These are trailing

55. ## college

create a table that lays out a day-to-day plan to use as a job aid for your employment search, spanning 3 weeks

56. ## math

The mean systolic blood pressure of adult males is normally distributed with a mean of 138 (millimeters of mercury) and a standard deviation of 9.7. What percent of adult males have blood pressure between 161.28 and 164.9?

57. ## visual basic

Program that i am having trouble with having hard time how to figure out to assign non-zero digit to a variable! Create a variable first as integer  Assign first non‐zero digit of your V‐number to the variable first

58. ## math

Estimate the number of personally constructed greeting cards possible at a machine if there are 12 designs, 30 messages, 18 closings, and 10 different paper stocks on which to print the card. Indicate how you made your estimate. How valid was your estimate

59. ## English

When doing a work cited page do you have to put the pages that you used. I already inserted the pages that I used when I sighted in my paper?

60. ## Math

For the following equations, write a word problem draw a picture, and find the solution to the equation: 5/12 - 1/3= 1/2 - 2/3=

61. ## Math

What is the product of (1 1/3+3 1/2)(3/4)

62. ## Math 1

Without finding the exact answer, select which of the following numbers is the best estimate of each sum or difference of 2/3, 0, or 2/3. of the problem 1/9 + 2/5 - 1/3 - 3/4. How would you solve this as an estimation?

63. ## Math

Find the point of intersection between y=2-(1/2)x and y=1+ax. (a=alpha sign). You answer will be a point in the xy plane whose coordinates involve the unknown a . I got that which is x=2/(2a+1), y=(1+2a)/(2a+1)

64. ## Corporate Finance

Nolan is in favor of a share repurchase. He argues that a repurchase will increase the company’s P/E ratio, return on assets, and return on equity. Are his arguments correct? How will a share repurchase affect the value of the company?

65. ## Math Word Problem

Let A be the set containing all rational numbers that are less than 5. Is there a rational number q in set A such that all other numbers in set A are less than q? Why or why not?

66. ## economics

who among the founding fathers is the visionary of industrialization?

67. ## physic

Hi!An object with mass m1 = 5.00 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley and is then fastened to a hanging object with mass m2 = 10.0 kg, as shown in the figure below. Find the acceleration of each

68. ## CHEMISTRY

WHAT IS THE MAJOR PRODUCT OF DEHYDRATION OF AN ALCOHOL?

69. ## science

what is air? a compound, a mixture, a solution, or an amalgam

70. ## Physics

A disc of radius 50.0cm is rotating at 120 rpm, and its angular acceleration is 3.00 rad/s^2. Find the magnitudes of the velocity, v, and tangential acceleration, a, of its outer edge.

71. ## MATH

If a population consists of ten thousand individuals at time t=0 (P0), and the annual growth rate (excess of births over deaths) is 3% (GR), what will the population be after 1, 15, and a 100 years (n)? Calculate the "doubling time" for this growth rate.

72. ## math

what characteritic do the numbers 8,10,15,26 and 33 have that the numbers 5,9,16,18 and 24 don't have

73. ## Beth/225

Research Methods Matrix A psychologist is planning to conduct a study that would examine pathological liars and the quality of their romantic relationships. You have been asked to provide the psychologist with a recommendation for which research method

74. ## French

Translate these sentences in French please. I see you. He sees us. We see them. She sees them. She sees you all. I invite you. I invite him. He invites us

75. ## French

Give your opinions by answering the following questions in complete sentences in French. Quel est ton sport favori? À ton avis, le tennis est plus intéressant ou moins intéressant que le football? À ton avis, quel est le sport le plus ennuyeux? Pour

76. ## Chemistry

A 0.1mol/dm^3 aqueous solution of phosphoric (V) acid, H3PO4, is mixed with a 0.1 mol/dm^3 of aqueous solution of sodium hydroxide. Which mixture will form the salt Na3PO4? a) 10cm^3 of H3PO4 with 30cm^3 of NaOH b) 10cm^3 of H3PO4 with 10cm^3 of NaOH c)

77. ## Math

For y = a sin x 'a' is called the amplitude. What effect does 'a' have on a graph ??? Please help if you can .

78. ## english

Ranging from the use of pictures at the beginning og wtiting, to the birth of the photonic alphabet.

1. Why is the electric potential midway between a dipole equal to zero? 2. How can you identify an equation as being that of a fractal? 3. How does a current carrying wire on top of a magnetized compass needle affect its direction? THANKS

80. ## math

1.A box contains four red marbles, seven white marbles, and five blue marbles. If one marble is drawn at random, find the probability for each of the following: a.A blue marble is drawn: ______ b.A red or blue marble is drawn: _____ c.Neither a blue or red

81. ## Math

Separate the fractions 2/6, 2/5, 6/13, 1/25, 7/8, and 9/29 into two categories. The two categories are those that can be written as a terminating decimal and those that cannot. I don't understand what a terminating decimal is.

82. ## Math

Without finding the exact answer, select which of the following numbers is the best estimate of each sum or difference of 2/3, 0, 2/3. 1/9 + 2/5 - 1/3 - 3/4

83. ## Science

For a toy cannon that fires out masses, how will the velocity of a projectile of mass m from the cannon compare to one of mass 2m? [What is the principle behind this since the answer is for mass of 2m a speed of (v/radical 2)] Please help!

84. ## 4 grade FL social studies weekly

why did explorers come to the new world?

85. ## socials

develop a hypothesis that could explain why some French farmers were relatively well-off while others were very poor. A hypothesis is a proposed answer,based on actual evidence,to a question. I need help on this thanks:-)

86. ## Math

Use common denominators to compare the pair of rational numbers of 5/7 and 5/8.

87. ## Math

Is the product of two irrational numbers always an irrational number?

88. ## Math

Use a linear model (for example, a number line, a ruler) to compare the pairs of rational numbers 1/4 and 1/6

89. ## Math

A terminating decimal ends after a certain finite number of decinal places, and does not have to be rounded off. An example would be 378 = 0.875 Your selfterminating decimal fractions are: 2/5, 1/25, and 7/8 So how would I form a conjecture of the

90. ## Math

A roll of carpet 9 feet wide is 30 feet longer than a roll of carpet 15 feet wide. Both rolls have the same area. Find the dimensions of each.

91. ## Calculus

Find the derivative of tanh(e^t)

92. ## science

independent variable

93. ## algebra

I need to solve this using the addition and multiplication principle. 5+8x

94. ## science

briefly identifying three fresh and three ocean water resource issues

95. ## critical thinking

How can I apply critical thinking when evaluating, articles, advertising, media and conversations?

96. ## math

how would I write this in scientific notation 04980000007507 I am getting confused with it all can you help me fine examples with this. thanks also how would I add this up 10^4+10^4+10^3= is it 21000 or 10^11

97. ## Factoring

x^2+6x=7 i factored it so it's (x+7)(x-1)=0. The answers I got were 7 and 1. Is this correct? Thanks!

98. ## language arts

Can you tell me of any websites that I could practice my grammar skills?

99. ## math

convert each of the following: . 155km to m . 2.56Ml to l .155uF to mF . 1,850nm to mm . 1.68Gb to Mb . 165pm to nm

100. ## math

Height: The volume of a cone is 100 in^3. Find a function that models the height h of the cone in terms of its radius r.

101. ## math

This is a confusing problem to me also, can someone please help me? What are the odds in favor of getting at least one head in three successive flips of a coin?

102. ## To Ms. Sue

here is the hypothesis: If farmers could own more plots of land, then they could grow more agricultural products. Sorry if I posted this a bit late. Can you tell me if this is correct, this is all I could come up with ,thanks

Although this was my first trip to another country, I was not scared when the plane took off. I was traveling to where my great grandfather had been born. En ese momento el jet sacado, no tenía miedo. Aunque éste era mi primer viaje a otro país. Viajaba

Era muy emocionado mientras que amé el eschucio de las muchas historias sobre Ismir, Turquía I was very emtional while I was learning the history of my family in Ismir, Turkey

105. ## Math

Height: The volume of a cone is 100 in³. Find a function that models the height h of the cone in terms of its radius r.

106. ## Calculators- memory?

For the TI-84 plus edition calculators do the programs you created and notes you put on there get deleted once you change the batteries? this is a very urgent question. thank you.

107. ## French

Prepare three groups of statements that compare three things. The sentences may be something similar to this: Music is fun. Tennis is more fun than music. French is the most fun of the three.

108. ## French

Two questions in French about activities that your classmates prefer or want to do.

109. ## French

REad the passage below and please answer the following questions. Je n'habite pas dans une grande ville. J'habite à la campagne. La vie à la campagne est très amusante. Je m'amuse beaucoup avec les animaux et avec les activités que je peux faire. Je

110. ## math

Can someone please help me with this problem also? A study of motor vehicle rates in the 50 states reveals that traffic death rates (deaths per 100 million motor vehicle miles driven) can be modeled by the normal curve. The data suggest that the

111. ## English

Is inricuous a word and if so what is the definition.

112. ## math

Can someone help me explain this misconception? A student asks, “What’s wrong with the argument that the probability of rolling a double 6 in two rolls of a die is because ” Write an explanation of your understanding of the student’s misconception.

113. ## current events

what happened on the moon on october 9, 2009

114. ## Biology

What's the difference between LB "-" and LB "+"?

115. ## Math

Explain why the definition of a fraction restricts the denominator to being a nonzero integer.

116. ## Math

Kendra has 4 yards of electrical wiring to use in setting up her science fair experiment. She needs to cut it into lengths of yard. How many pieces will she be able to make from the 4 yards? would this be solved by 4 divided by 3/4?

117. ## physics

A force of 70.0 N is exerted at an angle of 30.0° below the horizontal on a block of mass 8.00 kg that is resting on a table. What is the magnitude of the normal force acting on the block?

118. ## Math 1

Find the solution and write a word problem for 5/12 - 1/3 and 1/2 - 2/3

119. ## French

I am working on a paragraph and I need help on my introduction. Hi, I'm Lisa, and I love to play sports such as volleyball, and soccer. One sport I don't like is hockey, because I it doesn't really interest me.

120. ## Help

is tutorvista a free website

can someone please look at my earlier post on socials, I would like all the help i can get, thank you

123. ## Political Science

What does the Federal Reserve have to do with unemployment?

124. ## Math

Find each quotient 3/4 divided by -12 5/4 divided by 2 2/3 18 divided by 4.6 3.06 divided by 0.22

125. ## math

12.34(9.3-2.7)-(0.3)