# Questions Asked onDecember 6, 2007

1. ## math

if 12 counters are 3/4 of a set, what is the whole set of counters?

2. ## Physics

A rifle is fired in a valley with parallel vertical walls. The echo from one wall is heard 1.0s after the rifle was fired. The echo from the other wall is heard 1.0s after the first echo. How wide is the valley?

3. ## Physics

This is how the problem starts out: A meter stick is placed with the fulcrum at the 50-cm mark. If a 120-g mass is placed at the 25-cm mark and a 25-g mass at the 10-cm mark, where should a 500-g mass be placed to balance the system? I thought that since

4. ## chemistry

What is dipole moment of BeCl2? and hybidization?

5. ## chemistry

are there 0 pi bonds and 5 sigma bonds in the PCl5?

6. ## Math

There is one bus with seven girls on it. Each girl has seven backpacks with seven lions in each backpack. Each big lion has seven little lions. How many legs are there all together?

7. ## chem

calculate the max wavelength of light capable of removing an electron for a hydrogen atom from the energy state characterized by the following : n=2 in nm n=4 in nm

8. ## chem

calculate the change in energy expected for each of the following processes 1. Rb(g) + Br(g) --> Rb+ (g) + Br- (g) 2. Mg(g) + I(g) --> Mg+ (g) + I- (g) 3. Mg+ (g) + I(g) -> Mg+2 (g) + I- (g) 4. Mg(g) + 2I (g) -> Mg+2 (g) + 2I- (g) in kJ

9. ## Chemistry

Do PCl5 have 3 lone pairs for each Cl? and 1 lone pair for P ??

10. ## math

The capacity of an elevator is either 15 children or 11 adults. If 8 children are currently in the elevator, how many adults can still get in?

11. ## Precalc

Find the exact solutions to each equation for the interval [0,360) 2cosx-secx = 1

12. ## physics

A car is traveling 20m/s when the driver sees a child standing in the road. He takes 0.8s to react, then steps on the brakes and slows at 7.0m/s^2. How far does the car go before it stops? i don't know where to start.

13. ## Math - Statistics

Suppose that the mean number of customers who arrive at the check-out counters each minute is 4. Create a Poisson Distribution with u (lamda) = 4 for x = 0 to 20. Compare your results to the histogram. 20 random numbers are generated with a Poisson

14. ## Math / Algebra Word Problem

The Parkhursts used 160 yd of fencing to enclose a rectangular corral and to divide it into two parts by a fence parrallel to one of the shorter sides. Find the dimensions of the corral if its area is 1000 yd^2 Thank you!

15. ## physics

A rock is dropped into a well. Five Seconds later a splash is heard. Calculate the depth of the well(assume the time for sound of the splash to reach you is too small to consider.) how can i calculate the depth of the well if the only thing that's given is

1. Write the balanced chemical equation for the single displacement reaction of magnesium and sodium thiosulfate. Is this right? 6Mg + (S*2*O*3)*2 -> 6MgO + 2S*2 2. Write the balanced chemical equation for the double displacement reaction of hydrogen

17. ## Physics

A youngster shoots a bottle cap up a 15.0° inclined board at 1.92 m/s. The cap slides in a straight line, slowing to 0.95 m/s after traveling some distance. If the coefficient of kinetic friction is 0.35, find that distance. So I get that (1/2)MV^2 =

18. ## Physics

Carol drops a stone into a mine shaft 12.6 m deep. How soon after she drops the stone does she hear it hit the bottom of the shaft?

19. ## algebra

Pick a country of your choice that is experiencing population growth. Using the Library, web resources, and/or other materials to find the most recent population count of the country you have chosen and the population growth rate of that country. Use that

20. ## Math

this question does not make sense to me. Add the proper constant to the binomial so that the resulting trinomial is a perfect square trinomial. then factor the trinomail. X^2+21x+__ What is the constant term? What is the factored for of the trinomial? i

21. ## chemistry

for this reaction: 2NO + heat N2 +O2 which way would the equillibrium shift if catalyst is added?

22. ## Physics

One closed pipe organ has a length of 2.5 m. The frequency of the note is 34.3 Hz. When a second pipe is played at the same time, a 1.7 Hz beat note is heard. By how much is the second pipe too long? Would you have to use the frequency of the second pipe

23. ## math

michelle went on a 24-mile bike ride by lunchtime, they had ridden 5/8 of the total distance.How many miles did they have left to ride after lunch.

24. ## English hard crossward

ok my teacher gave us a crossword puzzle to do she said i was so hard that we can ask anyone for help and use the internet to look up the answers if you want to help please reply.

25. ## Math

If 50 counters are the whole set, what fraction of the set is 45 counters?

26. ## English

Provide synonyms of "low achievers."

27. ## Chemistry

molecular equation for BaBr2 (aq) + PB(NO3)2 (aq) -> Ba(No3) + Pb(Br2) is that right or is it Ba(No3)2

28. ## criminal justice 255

Describe and apply six law enforcement strategies from Chapter 6 of Defending the Homeland. For each: Label the strategy as proactive, reactive, or both. Describe the strategy: What is it, and what is required to execute the strategy? List the top

29. ## Soc. Studies

how did the early civilizations start?

30. ## Psychology

What are the major criticisms of Freud's theory of personality by Alfred Adler and Carl Jung?

31. ## Uniform Motion

Doing homework and came across this problem that has me totally stumped... On Monday, Voltaire drove to town at 60 miles per hour. On Tuesday, he drove to town at 40 miles per hour. If the total traveling time for both trips was 15 hours, how far was it to

32. ## brain

In "split brain" experiments, the main commissure connecting the cerebral hemispheres is cut. Name this commissure?

33. ## Hearing Loss/Causes

I need websites on these Questions: How does a buildup of earwax cause someone to have a hearing loss? What happens when there is hearing loss in the inner ear? What are some reasons that a person may have a hearing loss in the outer or middle ear? What is

34. ## Math

Where do I start for this question. What is the most amount of money--all coins but no dollar coins--that you could have in your pocket and still not be able to give exact change for a dollar, a half dollar, a quarter, a dime or a nickel?

35. ## algebra

How do I do this? What is the probability of rolling a die twice and rolling a 6 the first time and an even number the second time? Is it 1/12, 4/32, 5/32, or Not Given?

36. ## HUM 130

I need information on History of key sacred texts in judaism? I can not find any and I know it is out there somewhere.

37. ## AP biology

I posted this question three days ago but no one answered. Hi you guys I am having trouble with the "cell communication" chapter so I would really appreaciate if someone could help out with this question "What could happen to the target cells in an animal

38. ## science

What kind of streams form v-shaped valleys? Streams that are first forming,streams that move slowly, streams that have meanders?

40. ## Maps

Where is the artic region?

asked by Like you'd want to know!
41. ## math

What is one way to find a missing side length in a pair of similar figures?

42. ## Chemistry

I do not understand sp,sp2,sp3 hybridization. How do they form from the valence orbitals?

43. ## Geology

What type of waves are Earthquakes?

44. ## chem

answer the following questions assuming that m (subscript s) could have three values rather than two and the rules for n, l and m (subscript l) are the normal ones. 1. how many electrons would an orbital be able to hold? 2. how many elements would the

45. ## Math

step 1: x = integral(from 0 to v) dv/(z^2-v^2) step 2: x = 1/2z ln((q+v)/(q-v)) How do you get from step 1 to step 2 ?

46. ## algebra

How do I do this? What is the probability of rolling a die twice and rolling a 6 the first time and an even number the second time? Is it 1/12, 4/32, 5/32, or Not Given?

47. ## economics

Why would assigning property rights be a solution to pollution caused by burning coal?

48. ## math

I sold a book on the Internet for \$6.00. I could have sold it at my garage sale for \$1.00. I made \$5 more on the Internet. What is the profit as a percentage? What is the formula for figuring that per centage?

49. ## algebra

How do I find the measurement of an angle of a triangle if I know what the other two angles are. For example, I know the first is 90 degress, the second angle is 30 degress, but I need to know what the third angle is.

50. ## Math

I'm trying to enter this so it shows up to what I need, but I need to know how to solve for the missing Letters: ABCD X 4 ---- DCBA It reads ABCD times 4 and the 4 is under the D.

51. ## math

Please explain how to do this problem: 5(9-3)+5x4-6=

52. ## algebra

How do I do this? You are building a corner cabinet, the walls intersect at a right angle. What is the perimeter of the cabinet if the height is 30 inches, the hypotneuse is 42 inches, and the base is unknown?

53. ## Algebra

If x1 and y1 is (2,2) and x2 and y2 is(3,2) what is the y intercept form? I'm confused on how to work the problem out step by step

54. ## Spanish 2

How do i say fork, knife, and spoon in spanish.

55. ## Grammar

Is this an example of a participial phrase? The man in the suit was her former fiance.

56. ## SCIENCE

1) How many major bones of the axial skeleton are there? I think 80 2) What are the accessory bones of the skull? I don't know

57. ## CPA

How long does it take to become a CPA and what are the procedures? thank you.

58. ## chemistry

which of the following will result in a chemical change?

59. ## Algabra!!!

ok i asked 4 help earlear ang got it but now im stuck again (2,5) M=1/2 the book says to "write an equation of the line that passws through the point and has the given slope. write the equation in slope-intercept form." but how do i do this with a fraction

60. ## spanish

How did the geography influence the immigration for the exploration in Colombia and Venezuela? How did the indegenous mix with the Europeans to develop the culture in Colombia and Venezuela? I've tried many websites such as fact monster, wikipedia,

61. ## math, I think I have it now...

Is this the correct way to solve this? 5+3x4-2= 3x4=12 +5= 17 -2+15 is the answer 15?????

62. ## HUM 130

i need help finding this info. please Hinduism Buddhism Confucianism Daoism I need this on all of these: Historical figures and events Central beliefs Nature of God Texts Ritual and practice (sacred elements & their meaning) Ethics and morality I need help

63. ## Math

Sam needs to feed 10 dogs at the animal shelter. The dog food is sold in 5 pounds. How many bags of dog food will he need to feed the dog for an entire week? Estimate your answer.(first estimate then multiply)

64. ## English

I am in USA for last 14 years almost but still have an accent. I tried hard to get rid of my accent and speek as good as one american born could, but I could do it. Can anyone recommend me anything helpful to correct my accent?

65. ## Chemistry

Is it possible for an electron to have n=2 l=1 m=-2? EXPLAIN PLEASE

66. ## Science

Why is passive soalr heating referred to as passive?

67. ## Physics

What two ways can waves interact? ^I have no clue what its asking

how did the geography influence the migration and exploration of colombia? venezuela? i need websitres for this urgent...please help asap... :(

69. ## Health

I have to do a 1 page essay on "Protecting yourself in Public". Now, our teacher just gives us work, she doesn't lecture us. Also I think it is due tomorrow (at least that's what my friend told me), and she assigned it today. So I tried looking on Google

K= 6.9x10^10 which way does this dominate to right or left? for equilibrium constant? this is a hw problem i just don't understand

71. ## history

During the middle ages what were the roles of the Crusades on the power of the Church, the knights and how they strong-armed their role into power for the church.

72. ## Science

Hey....I need help with my homework. I'm in 9th grade, high school. Its pyhsical science about Atomic Math.. Heres the question: Multiply the atomic number of hydrogen by the number of electrons in mercury, which has an atomic number of 80.

73. ## chemistry

what is a pi bond?

74. ## math

a light house has an angle of depression from the top of 34 degrees and is 30 meters tall. how far from the base of lighthouse is the boat?

75. ## math

don't understand help please When one half of the second of two consecutive integers is subtracted from the first of the two consecutive integers, the result is 2.

76. ## espanol

is this sentencecorrect? Mi tio tiene dos hijos.

77. ## Math

A tree casts a shadow that measures 5m. At the same time, a meter stick casts a shadow that is o.4m long. How tall is the tree?

78. ## chemistry

How to get the hybridization of N IN NO2- ?

79. ## linguistics

how do you pronounce these: ferdinand de Saussure???

80. ## math

If two triangles are similar, what can you say about the ratios of the two side lengths within one triangle and the ratios of the corresponding side lengths in the other triangle?

81. ## chem

what is the energy of a mole of UV photons having a wavelength of 13nm?

82. ## Biology

How many possible gametes would an individual produce in this tri-hybrid cross? Their genotype is AaBbDd,also what would all gamete possible combinations be?

83. ## chem

K= 6.9x10^10 which way does this dominate to right or left? for equilibrium constant? this is a hw problem i just don't understand

84. ## vocab

i need the verb form of eulogy aversion and officious

85. ## Math, again

Please explain how to do this problem: 5 + 3 x 2 + (4+2)= I did 5+3=8 x2+ 16 +6=22 did I do this correctly? Thank you...

86. ## Hearing Loss/Causes

What sends the signals to your brain, allowing you to distinguish one sound from another?

87. ## educational technology

what are the biological aspects of learning???

88. ## homework

i can't find one of my previous questions!?

89. ## Algebra 1

ok i have a problam i cant figure out how to do thie problam (1,-3),M= -4

90. ## please revsise english paper

Owning a home is an integral part of the American dream. But this year alone thousands of homeowners across the country face foreclosures. It is inevitable to see the high rise of home mortgage foreclosures nationwide. A record number of homeowners are now

91. ## Math

Hi again... 5(9-3)+5x4-6= 5x6=30 +5=35x4=140-6=134 is this how it is supposed to be done??? Is this the correct method? Did I get the correct answer?

92. ## Hearing Loss/Causes

Is damage to your inner ear reversible?

93. ## miss wezey

i have the same crossword puzzle do anyone know what Poet Van Duyn is it is 4 letters across ends with an a

94. ## english quick question

I see your point and I agree _______ your proposal. i answered with study guide says to WHY?????

95. ## math

x+2y=3 2x+3y=7

96. ## analogies

________ is to animal as giant sequoia is to tree

97. ## educational technology

what is the role of the brain in learning??? please answer...thanks a lot...