# Questions Asked onJuly 23, 2011

1. ## Physics

Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 250 kg. Its

2. ## Physics

The centers of a 15 kg lead ball and a 140 g lead ball are separated by 8.0 cm. What gravitational force does each exert on the other? Answer: 2.2×10^−8 N Now: What is the ratio of this gravitational force to the weight of the 140 g ball? I don't know

3. ## Statistics

Under what circumstances is the definitional formula easy to use?

4. ## geometry

find the value of x if l is parallel to m. the diagram is not to scale

5. ## Physics

How much work is done to move a 1400 kg car from rest to 25 m/s.If this takes place over a distance of 130 m, what is the average net force?

6. ## Chemistry

A 50g sample of metal was heated to 100 degrees Celsius and then dropped into a beaker containing 50g of water at 25 degrees Celsius. If the specific heat of the metal is .25 cal/g degrees Celsius, what is the final temperature of the water? A. 27 B. 40 C.

7. ## structured query language math

Display a list of all instructors, showing their ID, name, and the number of sections that they have taught. Make sure to show the number of sections as 0 for instructors who have not taught any section. Your query should use an outerjoin, and should not

8. ## chemistry

How many milliliter of 0.150 M H2SO4 (sulfuric acid) are required to react with 1.87 g of sodium hydrogen carbonate, NaHCO3, according to the following equation? H2SO4 + 2NaHCO3 --> Na2SO4 + 2H2O + 2CO2 dont understand this am i suppose to change 1.87 into

9. ## Math

A social security number consists of nine digits. How many different social security numbers are possible if repetition of digits is permitted? Oh goodness, I'm not sure what number to start with :(

10. ## Chemistry

calculate the pH and the pOH of an aqueous solution that is 0.035 M In HCI and 0.080 M in HBr?

11. ## Physics

An object's moment of inertia is 2.5 kgm^2. Its angular velocity is increasing at the rate of 3.0 rad/s^2. What is the torque on the object? In N*m units

12. ## physics

to a man walking with a velocity of 3km/h due east the wind appears to blow north .but when he increases the speed to 7km/h due east the wind apeears to blow from north east .what is the actual velocity of the wind?

13. ## Chemistry

Two more need help figuring out how to do: How many liters of water vapor can be produced when 8.23 liters of oxygen gas reacts with hydrogen gas (H2g + 02g = H20g. How many liters of water vapor can be produced if 108 grams of methane gas are conbusted at

14. ## CHEMISTRY

AT 25 DEGREES CELSIUS THE STANDARD ENTHALPY OF COMBUSTION OF GASEOUS PROPANE IS -2219.0 KJ PER MOLE OF PROPANE AND THER STANDARD ENTHALPY OF GASEOUS PORPYLENE IS -2058.3 KJ PER MOLE OF P[ROPYLENE. wHAT IS THE STANDARD ENTHALPY CHANGE FOR THE FOLLOWING

15. ## Am. History

the question was to place events in chronological order 1. French and Indian War begins 2. New Englanders capture Frech port of Oswega 3. The last French fort falls in New York 4. British capture Montreal 5. Treaty of Paris am i right?

at time t, the position of a body moving along the s-axis is s=t^3-12t^2+36t m. find the total distance traveled by the body from t=0 to t=3

17. ## Chemistry

What mass, in grams, of oxygen gas (O2) is contained in a 10.5 liter tank at 27.3 degrees Celsius and 1.83 atmospheres Trouble figuring out what formula to use to get the answer...want to understand how to get the right answer

18. ## math write in sql

Display the list of all departments, with the total number of instructors in each department, without using scalar subqueries. make sure to correctly handle departments with no instructors. Is this the right answer: select department.dept_name from

19. ## statistics

Students are being surveyed about the weight of books and supplies they are carrying as they attend class.

20. ## Algebra

Aki’s Bicycle has determined that when x hundred bicycles are built, the average cost per bicycle is given by C(x)=-0.2x^2-0.1x+9.743, where C(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bicycle?

21. ## comm155

six sentences using pronouns about credit cards and finance

22. ## Algebra

An artifact was found and tested for its carbon-14 content. If 77% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon-14 has a half-life of 5,730 years.

23. ## Biology

What happened if you put the Elodea leaf cells in a solution of 0.5% NaCl,1.8% NaCl and 0.9%NaCl?

24. ## programming

Your first procedure is to be named MOVIE_RENTAL_SP and is going to provide functionality to process movie rentals. Based on data that will represent the movie id, member id and payment method your procedure will need to generate a rental id and then

25. ## Chemistry

At a certain temperature, 0.660 mol of SO3 is placed in a 3.00 L container. 2SO3=>2SO2+O2 Kc=

26. ## algebra 2

If y varies inversely as x, and y = 12 when x = 6, what is K, the variation constant?

27. ## statistics

78% of us homes have a telephone. In a random sample 250 homes, what is the probablity that fewer than 50 do not have telephone

28. ## help

In your socks assignment, create 5 scenarios, in which your hourly pay rate and the socks per hour change: the current "child labor" scenario (\$0.25 per hour, 4 socks per hour) "GM employees " (\$63,6) "Weedheads" (\$5,1) "McDonalds employees" (\$8,8)

29. ## chemistry

What would be the best technique to separate a soluble solid from a solution, like separating salt from a mixture of salt water? filtration chromatography electrolysis evaporation

30. ## English

Is this sentence correct or am I missing a comma? Is there a way to rewrite it so that it sounds better? I have learned how to properly write a complete sentence and to avoid run ons and fragments.

31. ## Math

One card is selected from a deck of playing cards. Determine the probability of selecting: a card greater than 9 or a black card. hmmmmm....i don't play cards, i'm not even sure how many is in a deck...38??

32. ## English 12

Does anyone know what book will we be using for poems,short stories and literature in Grade 12?

33. ## Math

According to the U. S. Census Bureau, the total 2008 U.S. population was 303,824,640. The chart below summarizes the 2008 population for five U.S. States. U. S. State 2008 Population Alaska 686,293 California 36,756,666 Hawaii 1,288,198 Idaho 1,523,816

34. ## Math

Which of the following is a solution to the trigonometric equation 2cos2 x - 5cos x + 2 = 0? A) 240 degrees B) 135 degrees C) 270 degrees D) 90 degrees

35. ## geometry

I found out the first part of which is x for the figure which was 115 degrees.They do give you the other measures of the angles which are 115,155,155,155.135,135,115.The second part of the problem say yo find the sum of the measures of the exterior

36. ## English

Each of the follwing sentences need to be re-written so they are grammatically correct, also they each have one grammaitical error such as subject-verb agrrement, run on sentence, verb form and tense or sentence fragment. please help 1. The bank robber

37. ## Math

Trigonometry problem: The sides AB and AC of triangle ABC are of lengths 4 and 7 respectively. M is the midpoint of BC. AM is of length 3.5, Find the length of BC.

38. ## algebra

would someone write out the whole process of the following question, including solving for y so that i can see what i am doing wrong. Thank you Solve by the substitution method. write as an ordered pair. 8x-3y=-94 2x+22=y

I'm writing a paper on the gasoline industry, specifically on how the general environment (i.e. demographics) and task environment (i.e. suppliers, distributors, customers, etc.) affect an organization within the industry (i.e. BP, Shell, Exxon-Mobil,

40. ## math

Given: l | | m m∠4 = 105° and m∠6 = 50°. m∠2 =

41. ## early Am. History

the French and Indian war has been called "The War That Made America". Why is this?

42. ## math write in sql

I have this question i need to know how to do for a test coming up this week. a)Display the list of all course sections offered in Spring 2010, along with the names of the instructors teaching the section. If a section has more than one instructor, it

43. ## Math

Solve for L L^2*pi*a- 2L*pi*x + pi*x^2=0

44. ## alg

1. (20 points) Police use the equation to estimate the speed (s) of a car, in miles per hour, based on the length (x), of its skid marks upon sudden braking on dry asphalt. a. Solve this equation for d. b. A motorist is involved in an accident. The skid

45. ## education

how are such difference between urban and rural communities with adolescentsocialization declining overtime and why

46. ## American Government

The greatest blow to the organinzational strength of U.S. parties was: Multiple Choice answers: A. National convention B. Direct primary C. Jacksonian democracyemergence of PACs D.

47. ## physics

a student tries to open a door at a distance of 1 cm from the hinge at a distance of 10 cm from the hinge and at a distance of 50 cm from the hinge why is a larger force required at 1 cm than at 50 cm?

48. ## resources for education young children part 3

I have three questions hope you can help 2. Which one of the following statements regarding the use of software in class is true? a) the emphasis of the program should be solely on repletion b) it should allow children to make their own decisions rather

49. ## english

what is the story "the return of the khokababu" who knows this.. where did you get the story?

50. ## Math

How many zeroes in 1070 million? Would that go into billion?

51. ## Chemistry

I have 2 chemicals, A & B. Note: both do not contain buffer salts. Chemical A expires 1 week later. Chemical B expires next year. I prepare solution C (general laboratory reagent)containing Chemicals A & B. When assigning the expiry date of solution C,

Assume that 100 subjects received one of four treatment combinations and produced the data reported below. Conduct a two-factor ANOVA and complete an ANOVA table reporting the relevant SS, df, MS, F's. N=100 n=25 the table shows A1 and A2 at the top and B1

53. ## math

Two angles are complementary. One of the angles is twice the other. The larger angle has a measure of

54. ## Math

Identify the period in degrees and radians: y = sin2x: y = cos(3/2)x: y = 2sin(1/2)x: y = 1.5cos0.25x:

55. ## math

suppose a map is scaled so that a half inch represents 25 miles. how many inches of the map represents 87 1/2 miles?

56. ## Chemistry

A girl is celebrating her seventh birthday. Each guest is served one large slice of chocolate cake, a hamburger, French fries, and some oranges. Identify the food groups mentioned above. If one slice of chocolate cake contains 35g of carbohydrate, 15g of

57. ## Psychology

I need help in developing an outline to explain the utility of social psychology within education so I can use as a guide to write a paper. I need to focus on both theory and application. PLEASE HELP!

58. ## English

Can you tell me the grammatical error on the following sentences eg:subject-verb agrrement, run on sentence, verb form and tense, or sentence fragment. Also These sentences need to be re-written. 1. They is both happy. 2. at 3PM I will be feeding the

59. ## science-biology..cells

please give me those parts of animal cell and plant cell.. please separate it..

60. ## biology

how can i identify the cell if it is plant or animal cell??

61. ## algebra

detail the process of polynomial division when the divisor is a monomial. Demonstrate the process with an example. How does this process change when the divisor is not a monomial?

62. ## math

how would i solve 2x+9y=33 x=19-5y

63. ## math

Two angles are complementary. One of the angles is twice the other. The larger angle has a measure of

calculate the probability of the following: A four, three, or spade from a single draw from a 52 card deck. there are 4 4's so 4/52, 4 3's so 4/52 and then 13/52 spades so 21/52 but and one 4 and one 3 are from spades so minus 2 = 19/52 Is this correct?

65. ## social studies

How do the similar cultural and economic environment of the united states and canada help to keep people and goods passing easily from one country to the other?

66. ## informal logic

Officer, please don't give me a ticket. My kids were hungry, and I had to drive fast to get them their food" may commit which fallacy?

68. ## Math

How would you graph this x^2-9/x+5? I keep on getting a weird looking function.

69. ## Health

I am writing a paper and it's asking to include resource information. Could that be the references or citations?

70. ## telemarketing

A telemarketer with B2B Communications has a 20 percent historical probability of making a sale during a shift where 100 calls were made. Assign a random variable x, where the value of x is equal to the number of sales made during the shift. Describe the

71. ## Life orientation

What are the 5 ways in which the environmental/human factor impact on the community?

Assume that 100 subjects received one of four treatment combinations and produced the data reported below. Conduct a two-factor ANOVA and complete an ANOVA table reporting the relevant SS, df, MS, F's. N=100 n=25 the table shows A1 and A2 at the top and B1

73. ## Math

If the odds of winning a raffle are 12:258, what is the probability of winning? 12/270 12/258 258/270 258/12