# Questions Asked onJune 28, 2012

1. ## physics

A 4.50-kg wheel that is 34.5 cm in diameter rotates through an angle of 13.8 rad as it slows down uniformly from 22.0 rad/s to 13.5 rad/s. What is the magnitude of the angular acceleration of the wheel? A) 0.616 rad/s 2 B) 22.5 rad/s 2 C) 5.45 rad/s 2 D)

2. ## calculus

solution for limit as delta x approaches 0 (1-cos4x/1-cos2x)

3. ## Chem!

10 grams of argon and 20.0 g of the neon are placed in a 1200.0 ml container at 25 degrees C. The partial pressure of neon is?

4. ## chem

would you expect the nonbonding electron pair domain in nh3 to be greater or less in size than for the corresponding one in PH3?

5. ## trig

A certain species of tree grows an average of 0.5 cm per week. Write an equation for the sequence that represents the weekly height of this tree in centimeters if the measurements begin when the tree is 800 centimeters tall?

6. ## science

prove that the maximum horizontal range is 4 times the maximum height attained by a projectile which is fired long the required oblique direction

7. ## algebra

Bob had three 10' lengths of conduit. If he used a total of 13.75' of conduit to install a motor, how much total conduit does he have left?

8. ## alg

An amplifier has an input power of 5 mW. The output power is 100 mW. What is the decibel gain to the nearest decibel?

9. ## algebra

An amplifier has a 50 watt output and a 5 watt input. What is the gain in decibels for this amplifier, rounded to the nearest decibel?

10. ## statistics

Acrylic bone cement is commonly used in total joint replacement to secure the artificial joint. Data on the force (measured in Newtons, N) required to break a cement bond was determined under two different temperature conditions and in two different

11. ## algbra

If fuses cost \$2.35 each, and each motor requires 3 fuses, how many motors can be supplied with \$493.50 worth of fuses?

12. ## Physics

An air traffic controller observes two airplanes approaching the airport. The displacement from the control tower to plane 1 is given by the vector A , which has a magnitude of 220 km and points in a direction 32 degrees north of west. The displacement

13. ## Physics

Standing on the surface of a small spherical moon whose radius is 6.30 104 m and whose mass is 8.00 1018 kg, an astronaut throws a rock of mass 2.02 kg straight upward with an initial speed 42.2 m/s. (This moon is too small to have an atmosphere.) What

14. ## offices finances

Who usually signs a collections letter? A. A law enforcement officer B. A lawyer C. The office professional D. the executive I believed that is C the correct answer but not sure pleased can someone help me thank you

15. ## Physics

An off-roader explores the open desert in her Hummer. First she drives 25 degrees west of north with a speed of 7.0 km/h for 15 minutes, then due east with a speed of 11 km/h for 7.5 minutes. She completes the final leg of her trip in 22 minutes.What is

16. ## algebra 2

Lisa Chen invested \$24,000, part at 8% and the rest at 7.2%. How much did she invest at each rate if her income from the 8% investment is two thirds that of the 7.2% investment?

17. ## statistics

The diameter of small Nerf balls manufactured at a factory in China is expected to be approximately normally distributed with a mean of 5.2 inches and a standard deviation of .08 inch. Suppose a random sample of 20 balls is selected. Find the interval that

18. ## Algebra

If two planes leave the same airport at 1:00 PM, how many miles apart will they be at 3:00 PM if one travels directly north at 150 mph and the other travels directly west at 200 mph? I understand that d = sqrt[300^2 + 400^2] d = sqrt[250,000] But im not

19. ## science

two bombs of 20 kg and 30 kg are thrown from a cannon with the same velocity in the same direction .which bomb will reach the ground first ?explain

20. ## geometry

half of a liter is equal to 16.91 ounces. How many ounces are there in 3 liters? help, Please

21. ## Real Estate Financing

"Mr. Smith acquired a property consisting of one acre of land and a two-story building five years ago for \$100,000. He also obtained an \$80,000 mortgage loan from ACE Bank to provide financing to complete the purchase. This year, Mr. Smith constructed

22. ## statistics

Breast feeding sometimes results in a temporary loss of bone mass as calcium is depleted in the mother's body to provide for milk production. An investigation gave the following data on total body bone mineral content (g) for a sample of mothers both

23. ## chemistry

Hvap 40.65 kJ/mol Hf -285.83 kJ/mol Hfusion 6.03 kJ/mol specific heat 4.186 J/gC molar mass 18.02 g How much energy is consumed by thawing 4.3 g ice?

24. ## CRITICAL THINKING

Please post a substantive response to the following discussion questions by clicking on Reply: Aristotle developed a theory of persuasion by which there are three ways a speaker can persuade an audience. Ethos is the idea that an audience can be persuaded

25. ## math

Given a dilation with the origin O (0, 0), by observation determine the scale factor "k." DO,K = (6, 12) (3, 6) What is the scale factor K = a0 Is the dilation an expansion or contraction? a1

26. ## chemistry

the volume at s.t.p. occupied by a gas q originally occupying 153.7 cc at 287 k and 750mm pressure, vapour pressure of gas q at 287k is 12 mm of hg

27. ## prealgbra

identify the number as rational or irrational. explain 291.87

28. ## alGebra

A constant tone is being applied to a speaker. The voltage across the speaker is 5 volts. The voltage across the speaker is increased to 15 volts in order to increase the sound level. What is the decibel gain, rounded to the nearest decibel?

29. ## Physics

A jogger is running around a circular track of circumference 480 m. If the jogger has a speed of 11 km/h, what is the magnitude of the centripetal acceleration of the jogger?

30. ## chemistry

In the macy's thanksgivingday parade, 2000, there was a new float, the cheerios'bee, buzbee. the jar of honey it was holding contained 36,763L of helium. the honey jar was 1/10 of the body size. What is the volume of the entire float?

31. ## algebra

Mike's family wants to build a rectangular fenced backyard area for their dog. They have a 20-meter length of wire fence and four posts. They can also use the 20-meter straight length of the back of their house as a side of the enclosure, but the fence

32. ## physics

an object falls from a plane flying horizontally at an altitude of 40,000 ft at 500 mi/h. How long will it take to hit the ground?

33. ## prealgbra

is the sequence 3,12,36 a geometric sequence?explain

34. ## ALGEBRA

If an electronic circuit experiences a loss of 3 decibels with an input power of 6 watts, what would its output power be, to the nearest watt?

35. ## science

a particle travels in a straight line ,such that for a short time 2s

36. ## Physics

Vector points in the positive x direction and has a magnitude of 75m . The vector C=A+B points in the positive y direction and has a magnitude of 95m . Sketch A, B, and C with tails at dot.Find the direction of the vector B

37. ## statistics

In a statistic class, 10 scores were randomly selected with the following results were obtained: 74, 73, 87, 57, 71, 68, 65, 77, 67, 66. What are the inner fences?

38. ## child day care management

Which of the following is the primary function of certification? A. To enforce mandatory government regulations B. To give credit to a facility that meets certain professional standards C. To grant a credential to an individual as an authorization to teach

39. ## KSU

At 3 P.M, ship A is 150 km west of ship B. Ship A is sailing east at 35 km/h and ship B is sailing north at 25 km/h. How fast is the distance between the ships changing at 7 P.M.? (Round your answer to one decimal place.)

40. ## statistics

The weight of a product is normally distributed with a mean of 4 ounces and a variance of .25 "sq ounces." The company wants to classify the unit as a scrap in a maximum of 1% of the units if the weight is below a desired value. Determine the desired

41. ## Chemistry

3.30 mL of vinegar needs 40.0 mL of 0.150M NaOH to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.10 qt sample of this vinegar?

42. ## Chemistry

Nitrogen Oxides, NOx (mixture of NO and NO2). The NOx in the atmosphere is slowly broken down to N2 and O2 in a first-order reaction. The average half-life of NOx in the smokestack emissions in a large city during daylight is 3.9 hours. (a) Starting with

43. ## Chemistry 2

Chlorine atoms contribute to the destruction of the earth's ozone layer by the following sequence of reactions: Cl + O3 --> ClO + O2 ClO + O --> Cl + O2 Where the O atoms in the second step come from the decomposition of ozone by sunlight: O3 --> O + O2

44. ## Physics

Eris, the largest dwarf planet known in the Solar System, has a radius R = 1200 km and an acceleration due to gravity on its surface of magnitude g = 0.77 m/s2. (a) Use these numbers to calculate the escape speed from the surface of Eris. (b) If an object

45. ## Math

If a dog can run 10ft in1/5 of a second how many feet can it run in 20 seconds

46. ## calculus

All right, sorta hard to explain but I will try my best. I am suppose to find the equation for the that lines that are tangent to the curve y=cot^2(x) at the point (pie/4, 1)....(the x is not to the power of 2, a variable right next to the cot^2) I am not

47. ## organizational behavior

RESEARCH ON SATISFACTION, EMOTIONS, AND TEAM PROCESSES FOUND IN OB DRAWS HEAVILY FROM STUDIES IN:

48. ## statistics

A particular report included the following table classifying 711 fatal bicycle accidents according to time of day the accident occurred. Time of Day Number of Accidents Midnight to 3 a.m. 38 3 a.m. to 6 a.m. 29 6 a.m. to 9 a.m. 64 9 a.m. to Noon 78 Noon to

49. ## chemistry

0.44 gram of a colorless oxide of nitrogen occurs 224 ml at stp. write the molecular formula of the compound

50. ## science

two equal forces have their resultant equal to either.what is the inclination between them?

51. ## chemistry

How many molecules are in 15.6 g NO2? Answer in units of molecules

52. ## prealgbra

brandon needs \$480 to buy a tv and stereo system for his room.He received \$60 in cash for birthday presents. he plans to save \$30 per week from his parttime job.to find how many weeks w it take to have \$480, solve 60+30w=480

53. ## physics

A 4.7 g bullet is fired horizontally into a 0.50 kg block of wood resting on a frictionless table. The block, which is attached to a horizontal spring, retains the bullet and moves forward, compressing the spring. The block-spring system goes into SHM with

54. ## ECONOMICS

According to the principles of a market, when the price of a hot pretzel is \$2.50, how many pretzels are sold Price of a Hot pretzel:\$2.50 Quantity demanded:125 Quantity supplied:300 A) 250 B) 200 C) 150 D) 125 E) 50 Would it be D? since that's how much

55. ## prealgbra

is a triangle with sides of length 6ft,21ft,23ft a right triangle.? explain

56. ## chemistry

how many grams of H2O will be produced if 32.0 grams N2O are produced in the reaction ?

57. ## Algebra 1 (Scientific Notation)

How will you write this in scientific notation? if you do not mind explaining how you did it. Thank you! \$15,789,000,000,000

58. ## Algebra 2

What simple interest rate will Susan need to secure to make \$2,500 in interest on a \$10,000 principal over 5 years? how would i figure this out?

59. ## Physics

When two identical ions are separated by a distance of 5.9 multiplied by 10-10 m, the electrostatic force each exerts on the other is 6.0 multiplied by 10-9 N. How many electrons are missing from each ion?

60. ## science

a 6.85ohm light bulb is connected to a 12.0v battery. how much current flows through the bulb. how much power bulb consume

61. ## prealgbra

is the sequence 5,9,15 an airthmetic sequence?explain

62. ## science

which is the pah followed by a javelin projected horizontally by an athlete?

63. ## chemistry

Hvap 40.65 kJ/mol Hf -285.83 kJ/mol Hfusion 6.03 kJ/mol specific heat 4.186 J/gC molar mass 18.02 g How much energy is consumed by thawing 4.3 g ice?

64. ## algerabra 1

how do you find the equation for the line containg the side opposite the side containg the first two vertices?

65. ## physics

A comet orbits the Sun with a period of 72.8 yr. (a) Find the semimajor axis of the orbit of the comet in astronomical units (1 AU is equal to the semimajor axis of the Earth's orbit). (b) If the comet is 0.55 AU from the Sun at perihelion, what is its

66. ## algerabra 1

how do you find the equation for the line containg the side opposite the side containg the first two vertices?

67. ## physics

a 70-kg man climbs a mountain 1200 m high (measured from the base) in 4 h and uses 9.8 kcal/min. calculate his power consumption in watts. what is his power output in useful work? what was the efficiency of this man during the climb?

68. ## Math

if \$15,000 is invested at 6%, compounded quarterly, how long will it be before it grows to \$25,000?

69. ## Engineering Science

A bullet with a mass of 28g and travelling at 300m\s strikes a body with a mass of 14kg and which can move freely. The bullet remains in the body. At What velocity will the body start to move?

70. ## physics

if i travel in a bus which have 40km/hour speed than i through a coin in vertical hight. Does the coin fall in my hand

71. ## chemistry

An experiment is set up in which a copper surface is irradiated with high-intensity photons with a wavelength of 15.0nm. Electrons ejected from the surface are found to have a velocity of .548% of c. What is the binding energy of copper's most weakly bound

72. ## bashyam

For the circuit shown in the figure, letε=14 V. Initially the switch is open and the capacitor is uncharged. When the switch is closed, there is an initial instantaneous current of 1.00 mA in the resistor. Two seconds later the current through the

73. ## Finance

a company is offering the US Government's 8.5% 2020 treasury bond for "150.266" . What is the price in dollars of the bond?

74. ## prealgbra

charlie is at a small airfied watch for the approach of a a small plane with engine trouble. he sees the plane at an angle of elvation of 32. at the same time, the pilot radios charlie and reports the planes altitude is 1,700 feet. Charlies eyes are 5.2

75. ## Writing/BME

Strength is defined as the amount of stress a material can withstand before fracturing. Therefore, the more strength a material has, the more durable it is. Thus, a toric lens should be constructed from a material with high strength. Every time I read this

76. ## Math: profits and costs

Anne and Carol conducted a cooking class. They collected \$375 from the participants as registration fees. They used \$180 of this money to pay for rental of the kitchen. Carol took the remainder of \$195 and \$205 of her own money for Anne to buy food. Anne

77. ## finance

BBA307: Finance Exercise 8A Assignment 8.1 Assignment 8.1: Capital Budgeting Application You have just graduated and one of your favorite courses was Financial Management. While you were in school, your grandfather died and left you \$1 million. You have

78. ## calculus

(SIN^8X-5 SIN^5X+SINX)COSX DX I need the answer to this, because I have tried so many times and cannot figure it out.

79. ## calculas

Find the volume of the solid that is obtained when the region under the curve y=©ø¡îx+3 over the interval [5, 24] is revolved about x-axis.

80. ## Statistics

what drawback of the standard deviation is illustrated by example?

81. ## Trigo

Two men travelling in opposite directions at the rate 18 and 22 miles per hour respectively started at the same time from the same place. In how many hours will they be 250 miles apart?

82. ## Science

1. What are some of the evidence that led Wegener to propose his theory, why it met with hostility and why the theory was revived in the 1950’s?

84. ## algebra1

factor: 4x^8-24x^7+12x^6

85. ## sequence math

Find the sum of the first 27 terms of the following sequence: 10, 18, 26 . . .

86. ## science

derive the expression for time of flight maximum height & range when a body is projected at an angle thita frommthe vertical position with a proper diagram.

87. ## American Government

I am having trouble finding anything on this in my book Please help. A ______ is someone who is not in the military.

88. ## history

(1) What was the main goal of the Hasburg Empire during world war 1? (2) Why weren't the San Humters of southern africa overwhelmed during the 1900's? (3)what was an important soical development during the 1870's in japan

89. ## Finance 370

What are some other applications where WACC (weighted average cost of capital) would be useful?

90. ## California History

What's a good website that i can read about the Chinese immigrant labor during the railroad era? & whats one way i can start the first sentence on a one page report? Thank You

91. ## statistics

how large a sample size is needed for 2 sided 95% confidence interval to have a length of 2 weeks when mean is 3.6

92. ## maths

solve the following -3x = -18

93. ## Algebra

What is the area of a circle with radius a^2 - b^3 + c^2 centimeters. Express your answer in term of "pi".

94. ## Math

Jim can fill a pool in 30 min, sue can do it in 45 min, Tony can do it in 90min, how long would it take all three to fill the pool together? How would i figure this out?

95. ## Algebra 116

in 2000, In a country A, the average family net worth was &270,000, and there were about 6.3 x 10^7 families. Calculate the total family net worth in Country A in 2000. What is the Country A's total family net worth ?

96. ## math

Write the equation of the line that passes through the points (4, 7) and (-3, 7). Show all your work for credit.

97. ## algebra

-4 (9r+3) +5(3r+7)=

98. ## psychology

Hello, I have to do a method section for a paper and need to know what I would put down for measurement and procedure section. like an example its on 500 college women and 500 college men participating in a study. thanks

99. ## math

Your store’s average basket (transaction) size for the month of March was \$11.50 and you believe the average basket size will remain the same for your store in April. One of your hourly employees had an average basket size of \$9.00 for the month of March

100. ## Psychology

Dr.Gillian explained that research has identified over 25,0000genes that are responsible for the genetic information that progresses from generation to ceneration.These genes are:

101. ## math

what is the sum between 5 in the ten billions place and 5 in the hundred thousands place?

102. ## Algebra

A dining table is in the form of a square. Its side is 3x - y + 4z. What is its area?

103. ## prealgbra

solve by simulating the problem.you have a 5 -question multiple -choice test. each question has four chices. you don't know any of the answers. what is the experimental probility that you will guess exactly three out of five question correctly?

104. ## physical science

a certain amount of water freezes and the resulting weight of the ice is

105. ## american literature

what is the attractive legend about hawthorne?

106. ## Algebra

(1/2a + 3/4b - 1/3c)^2

107. ## MATH Algebra 116

is this correct? multiplying ans writing it my answer in standard form. (2*10^5)*(4*10^3) =8*10^8 =800000000 then my answer should be 8.0 I am correct?

108. ## English

what literary device helps you develope a religous theme in a poem

109. ## Algebra 1

can a base be negative at the same time as my exponent? how will you solve this one? -6 ^-3

110. ## pre cal

7tan^2(pheta)-2=3

111. ## math

if there are 10 more girls than boys in a club with 60 members, how many are boys?