# Questions Asked onSeptember 25, 2009

1. ## Physics

A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 28degrees above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.40 and 0.30, respectively.

2. ## Calculus

A plane flying with a constant speed of 5 km/min passes over a ground radar station at an altitude of 4 km and climbs at an angle of 35 degrees. At what rate, in km/min is the distance from the plane to the radar station increasing 10 minutes later? I got

3. ## physics

a boy throws a stone straight upward with an initial speed of 15.0m/s. what mazimum height will the stone reach before falling back down.

4. ## chemistry.

A sulfur oxide is 50.0% by mass sulfur. This molecular formula could be?....IS IT NOT SO2???

5. ## College Physics

A turntable reaches an angular speed of 33.3 rpm, in 2.0 s, starting from rest. (a) Assuming the angular acceleration is constant, what is its magnitude? (b) How many revolutions does the turntable make during this time interval?

6. ## FINANCE

Your uncle offers you a choice of \$30,000 in 50 years or \$95 today. If money is discounted at 12 percent, which should you choose?

7. ## bio

An organism is composed of two layers of cells. A student is observing one of the layers with a compound microscope under high power. To observe the second layer of cells, the student should 1 rotate the nosepiece 2 adjust the mirror 3 turn the fine

8. ## Chem

A flask weighs 95 g when empty. When filled with 200 mL of a certain liquid, the weight is 328 g. What volume (in milliliters) would 1,000 g of the liquid occupy? I am confused on set up I know d=m/v so v=m/d

9. ## Physics

A 28.0kg block is connected to an empty 1.80kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.41 and the coefficient of kinetic friction between the table and the block is 0.35.

10. ## Math

In a population of exam scores, a score of X=88 corresponds to z= +2.00 and a score of X=79 corresponds to z= -1.00. Find the mean and standard deviation for the population.

11. ## statistics

In a population of exam scores, a score of X=88 corresponds to z= +2.00 and a score of X=79 corresponds to z= -1.00. Find the mean and standard deviation for the population.

12. ## Math- calculus

Given f(x) = x ^ 3 - x ^ 2 -4x +4 Find the zeros of f. Write an equation of the line tangent to the graph of f at x = -1 The point (a,b) is on the graph of f and the line tangent to the graph at (a,b) passes through the point (0,-8) which is not of the

13. ## physics

A house painter uses a chair and pulley arrangement to lift himself up the side of a house. The painter's mass is 69.2 kg and the chair's mass is 24.0 kg. With what force must he pull down on the rope in order to accelerate upward at 0.379 m/s2?

14. ## Orgo

The solubility of compound A in ethanol is .8g per 100ml at 0degreesC and 5.0g per 100ml at 78degreesC. What is the minimum amount of ethanol needed to recrystallize a 12.0g sample of compound A? How much would be lost in the recrystallization, that is,

15. ## chemistry.

What is the empirical formula of a compound that contains 29% Na, 41% S, and 30% O by mass? ..My answer is NaSO and I am not sure... can anyone help me for it?????????

16. ## Statistics

When circuit boards used in the manufacture of compact disc players are tested, it is discovered that each has a 5% chance of being defective. Suppose that a batch of 25 of these circuit boards is randomly selected. Would this be binomial or poission

17. ## MATH

Write each of the following ratios in simplest form. 1. The ratio of 5 3/5 to 2 1/10 A~8 TO 3? 2. The ratio of 7 dimes to 3 quarters A~ 14 TO 15?

18. ## physics

a bullet traveling horzontally at a speed of 350m/!@#\$%^&s board perpendicular to its surface passes through n emerges on the other side at a speed fo 210m/s. if the board is 4.00cm thick, how long does the bullet take to pass through it.

19. ## phys

A small metal cylinder rests on a circular turntable that is rotating at a constant speed. The small metal cylinder has a mass of 0.20kg, the coefficient of static friction between the cylinder and the turntable is 0.080, and the cylinder is located 0.15m

20. ## College Physics

A pendulum is 0.50 m long and the bob has a mass of 1.0 kg. At the bottom of its swing, the bob's speed is 1.6 m/s. What is the tension in the string at the bottom of the swing?

21. ## College Physics

A cyclist starts from rest and pedals so that the wheels make 7.7 revolutions in the first 5.1 s. What is the angular acceleration of the wheels (assumed constant)?

22. ## physics

The average speed of a nitrogen molecule in air is about 686 m/s, and its mass is 4.85×10-26 kg. If it takes 3.78×10-13 s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in the opposite direction, what is the magnitude of

23. ## physics

A 62.9 kg spacewalking astronaut pushes off a 697.0 kg satellite, exerting a 117.0 N force for the 0.977 s it takes him to straighten his arms. How far apart are the astronaut and the satellite after 3.57 min?

24. ## bio...

The main result of aerobic respiration is the 1 conversion of radiant energy into chemical energy 2 production of lactic acid as an end product 3 storage of energy in a polysaccharide 4 production of ATP from the breakdown of glucose

25. ## chemistry

What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm

26. ## Economics - PPF

Points on the graph: A(4,140) B(12,120) C(8,100) D(14,80) E(8,60) a) According to the PPF, Person A has ___ hours to allocate between work and leisure. b) Between points C and E, the opportunity cost of earning an additional \$10 income is ___. c) Between

27. ## Math

4x^3-20x^2-24x

28. ## Chemistry

which of the following compounds dissolve in water?? -Sodium Nitrate (NaNO3) - Sucrose (C12H22O11) - Sodium Chloride (NaCl) - Potassium Sulfate (K2SO4) - Ethanol (C2H5OH) - Sodium Bicarbonate (Baking Soda)(NaHCO3) - Calcium Sulfate (CaSO4) i did an

29. ## Calculus

At noon, ship A is 10 nautical miles due west of ship B. Ship A is sailing west at 16 knots and ship B is sailing north at 24 knots. How fast (in knots) is the distance between the ships changing at 3 PM? This is what I got but it's not right 28.727

30. ## Calculus

Water is being pumped into an inverted conical tank at a constant rate. The tank has height 9 meters and the diameter at the top is 4 meters. If the water level is rising at a rate of 28 centimeters per minute when the height of the water is 3.5 meters,

31. ## C Programming

This is what the program needs to do: Enter a temperature: 32.4 Enter 'C' for Celsius or 'F' for Fahrenheit: C Choose a conversion ('C' for Celsius or 'F' for Fahrenheit): F The temperature is: 90.3 F. How would I store the input when it asks for C or F,

32. ## Math

Indicate the metric unit that would be best used to express the mass of the object? A flower petal. My answer is: milligrams. Is this correct? Thanks.

33. ## Grade 8 math urgent

Gervais ate 1/3 of a aguette with his dinner. Chantel ate 1/4 of the leftover bagette as an evening snack. What fraction of the baguette did Chantel eat as a snack. My answer is 1/12. Am I correct?

34. ## math

What is the shortest lenght of television cable that culd be cut into either a whole number of 18ft pieces or a whole number of 30ft pieces?

35. ## maths

one mountain is 5000 ft high and can be reached by cable car from another mountain 7000ft away the other mountain is 3000ft high what is the lenghtof the cableto link the two mountains

36. ## art

hey guys anyone have any ideas of how i can visually present a narrative, (a story)? i need something unique and different as i'm only allowed images in the narrative and no text thanks so much

37. ## HCR 240

Explain why in terms of job performance & efficiency knowing medical billing terms is critical for working in the health care field. can someone help me? thank you

38. ## Foundations of Research

Develop a short questionnaire and Analyze the responses and comment on the validity and reliability of your questionnaire.

39. ## math

A basketball player makes 50% of his shots taken, on a bad night his percentage drops by a factor of 1/2. If he took 12 shots, how many did he make?

40. ## Literacy

In "Life without Principle," Thoreau writes, "I would have had him deal with his privatest experience, as the poet does." What does this statement mean?

41. ## physics

in an air bag test a car traveling at 100km/h is remotely driven into a brick wall. suppose an identical car is dropped onto a hard surface. from what height would the car have to be dropped to have the same impact that with the brick wall?

42. ## Calculus

Water is being pumped into an inverted conical tank at a constant rate. The tank has height 12 meters and the diameter at the top is 4 meters. If the water level is rising at a rate of 26 centimeters per minute when the height of the water is 1 meters,

43. ## ENGLISH1111111111111111

who was marginalized in "the great depression 1929"? And what other thing were marginalized in "the great depression 1929"? and any info on marginalization? Thanks

44. ## SPANISH

NAME OF A FAMOUS SPANISH PERSON WHO MADE A DIFFERENCE IN THE UNITED STATES

45. ## URGENT: Grade 8 Math

In my math question it says: Multiply. Simplify before multiplying. Use benchmarks to estimate to check the product is resonable. a)3/4 x 8/5 is one of the equations What are benchmarks?

46. ## biology

hi do dendrites generate or conduct impulses and do axons transmit to and from the cell body or do they transmit it away. thanks jim

47. ## psychology

description of the central themes and strategies of positive psychology as you understand them from your reading. the reading did not cover the themes of positive psychology. I don't know what to do. I even googled this question and I have not found any

In my atlas it says the largest european city is Moscow. But when you look for Moscow it is un Russia. Russia is a county of Asia. I am confused!

49. ## grammar

Which sentence is correct and why? 1. Did you know a famous animal-rights activist has criticized horse racing because of the dangers? 2. Did you know a famous animal-rights ativist have criticized horse racing because of the dangers?

50. ## chemistry.

The molecular of aspartame, the generic name of Nutrasweet, is C14H18O5. The molar mass of aspartame is?

51. ## socials

why was the king forced to recall Parlament? The king was forced to recall Praliament because he needed money.

how can i help my daugther learn to read?

53. ## actually it is about computers

how do I add sounds with my animation when using powerpoint

54. ## College Physics

A spy satellite is in circular orbit around Earth. It makes one revolution in 5.99 hours. (a) How high above Earth's surface is the satellite? (b) What is the satellite's acceleration?

55. ## College Physics

A wheel's uniform angular acceleration is constant. Initially its angular velocity is zero. During the first 1.0 s time interval, it rotates through an angle of 86.0°. a) Through what angle does it rotate during the next 1.0 s time interval? (b) Through

56. ## math

how do i factor 1) 3x^2+12x-15 2)3x^2-3x

57. ## math

explaine how you can fide the length of the missing leg on a right triangle? the lengtth are 4in and 6in

58. ## MATH

Write each of the following ratios in simplest form. Marc took 3 hours (h) to mow a lawn while Angelina took 150 minutes (min) to mow the same lawn a week earlier. Write the ratio of Marc’s time to Angelina’s time as a ratio of whole numbers. ANSWER~6

59. ## MATH

Find each rate 1. 240 pounds of fertilizer/6 lawns A~ 40? 2. Which is the better buy: 5 lb of sugar for \$4.75 or 20 lb of sugar for \$19.92? A~the 5 lb bag at 0.95 cents?

60. ## data management

Tasha has a piggy bank that contains 15 loonies, 30 quarters, 20 dimes, and 7 nickels. a) if she chooses one con at a random to buy some candy, what is the probability of choosing a loonie or quarter? b) if she chooses three coins, all at once , what is

A patient doesnt want her violent boyfriend to know she is having an abortion so she asks her Dr. to send all communications to her post office and to phone her only at work, What should the doctor do and what is the lagel basis for the advice? If she

62. ## physics

A 5.55 kg block covered in sandpaper is pushed along the ceiling of a room under construction. The block is pushed across the ceiling with a force of 77.9 N directed at an angle of 71.5° to the horizontal. If the coefficient of kinetic friction between

63. ## english

explain the impact terrorism and cyber crime interpret the fourth amendment?

can sumone unscramble this word .. conshourire

65. ## latin

WHATIS THE MEANING OF PERO

66. ## chemistry

What is the total pressure of a gas mixture that contains hydrogen at 0.45 atm, nitrogen at 0.25 atm, and argon at 0.60atm

67. ## Math

what is a interger?

68. ## chemistry

How much volume in liters will 100.0 g of oxygen occupy at 100 0C and 100 atm pressure?

69. ## Yr 10 Geography

An explanation of the roles and actions of different levels of governments relevant to Australia's Culture

what is the rule for ___,68,___,94,___,120

71. ## onomatopoeia

This should be relavantly easy and yet,i'm still blank! I just need a couple of examples of sounds in the city and the country in onomatopoeia form. (it's for 2 onomatopia poems,one incity,one in country)

72. ## Economics

The market is considered to be _____ (black market/equilibrium/disequilibrium/non-competitive) if quantity demanded does not equal quantity supplied. I'm not sure what the answer is... I narrowed it down to either disequilibrium or non-competitive.

After taking a shower, you notice that small droplets on the mirror. Explain how this happens and what change its going through. physical and chemical change.

74. ## Cost of Accounting

1-How does an actual system differ from a normal costing systems? What advantages does a normal costing systems offer? 2-Why is it necessary for a company to specify a relevant range of activity when making assumptions about cost behavior? 3- Why is it

75. ## fin 200

Healthy food, sell 50-pound bags of grapes to the military for \$10.00 a bag. The fixed cost of this operation are \$80,000, while the variable cost of the grapes are \$.10 per pound. what is the degree of operating leverage at 20,000 and 25,000 bags?

76. ## Grade 8 math urgent

The question is : Jason took 3/8 of his savings on a shopping trip. He used 1/4 of the money to buy a new coat. What fraction of his savings did he spend on the coat? My answer is 3/28. Am I correct?

77. ## spanish

Si ___ el n?ero de mi jefe, le __ para decirle que no puedo ir al trabajo hoy. a)sabr?, llamara b)llamar?, supiera c)supiera, llamar? d)llamara, sabr? __ a la fiesta si __ encontrar un vestido a)apropiado para llevar. b)Viniera, podr? c)Vendr?, pudiera

78. ## Physics

I keep on getting the wrong answer I don't know if there is even static friciton in this problem in the begining before the rope snaps or not and if so if it must be equal to the Mu they give because there is only one but you can't have the same values for

12-3m=18

80. ## Physics

I keep on getting the wrong answer I don't know if there is even static friciton in this problem in the begining before the rope snaps or not and if so if it must be equal to the Mu they give because there is only one but you can't have the same values for

81. ## math

what is the answer to (5-(3-4)*(2)*(7-8

82. ## math

how do I perform the indicated operation 20-(-5) ________ 20-(-|-5|)

83. ## french

student A: Est-ce que tu pouvois sortis avec tes amis ce soir? student B: No, je n'ai pas sortir aves mes amis ce soir.

For my assignment it says to flip through National Geographic Magazines and find examples of remarkable physical or cultural geography. So what am I looking for? (What is physical and cultural geography?)

85. ## health topics

i need help with a interesting topic about obesity in america i want it to be unique and different that catches your attention i can't think of any at the moment

86. ## Environmental science

What is a terrestial mitigation?

87. ## Another Data Management Question

Rain is an amazing singer, but cannot play any instruments. He desperately wants a rock band that has a drummer, a guitarist, a bass player, and himself on vocals. He decides to post an ad at the local coffee house for open auditions for his band - The

2(3)+4++

20_140

90. ## chemistry

aluminium + oxygen - aluminium oxide

266 / 38

92. ## English (Urgent)

How many Native Americans are here inn the world now? I did a google search, but I can't find my answer still, so can anyone please help me out wih this question? Thanks.

93. ## geography

If it is Thursday at 11pm in Singapore, what day and time is it in Tokyo?

94. ## Math

Find the other endpoint of a line segment with the given midpoint and one endpoint. Endpoint:(0,0); Midpoint:(2,-8). My answer is:(4,-16). Is this correct? Thanks.

95. ## English

How does Arthur Miller manage to create tension in Act Two of ''A View From The Bridge''? d how does act two reflect all the main themes in the play? I'm terrible at writing essays and I really need help! i'm not asking you to write it for me, just a

96. ## chemistry.

What is the empirical formula of a hydrocarbon that contains 89,94 by mass?

97. ## geography

what is physical and human geography?

98. ## math

which is the better buy 5lb of sugar for \$4.75 or 20lb of sugar for \$19.92

99. ## art

hey what do you guys think of when you hear "anything you can do" and "life was in the oceans 200m years before land" i need to brainstorm these to phrases thankyouu

100. ## 6th math

4 test grades 93, 86, 92, 80 5 test average 94 what are steps?

101. ## History

I need to do a poster about daily life in ancient Rome, im looking for some good illustrations to give me ideas. Can you help?

(0,2) m= 4/5

103. ## Math

Hi, I wanted to know how can I donwload "B2K - Badaboom (featuring Fabolous)/Take It To The Floor" file from your site. Where do I click? Thanks.

104. ## Number Theory

What characteristic do the numbers 8, 10, 15, 26, and 33 have that the numbers 5, 9, 16, 18, and 24 don’t have? (Hint: List the factors of the numbers.) Give two more numbers that have this characteristic.

105. ## Economics

Who can and who can't vote in the FOMC?

106. ## Economics

What rate does the FOMC set? Is the the Federal Funds Rate or the Discount Rate?

107. ## Physics

Describe the mechanism that make rifles recoiless.

a[n] ? is an ansewer to a scientific question

109. ## another computer question

its instructions arent clear and it dosent answer my question properly

110. ## Socials*

why was the Charles I, the king forced to recall Parlament? My answer is Because he needed money

In my atlas, it lists Caspian Sea as a lake. I'm confused