# Questions Asked onOctober 31, 2013

1. ## Chemistry

Individuals living near copper mines sometimes earn extra money by suspending iron objects in the mine wastewater. Based on your experimentation, explain why the iron objects would be suspended in the wastewater.

2. ## physicsh

Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 4.8-kg projectile from rest to a speed of 3.9 103 m/s. The net force accelerating the projectile is 4.8

3. ## 8th grade chemistry

which of the following molecules does not contain 5 atoms? A. CaCO3 B. Mg(OH)2 C. NaHCO3 D. Fe2O3

4. ## physics

Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 4.8-kg projectile from rest to a speed of3.9 103 m/s. The net force accelerating the projectile is 4.8 105

5. ## Biochemistry

a closed circular DNA molecule has 3675 base pairs and a topological linking number (Lk) of 345. Using 10.5 base pairs per turn, what would the writhe number (Wr)be for the molecule in order for it to optimize its base pairing?? I'm guessing we use the

3x-4z=2w

7. ## Math

Together , Tom and max have 72 football cards. Tom has 2 more than 4 times as many cards as max has. How many football cards does Tom have ?

8. ## Chemistry

An electron jumps from energy level 1 to energy level 2 by absorbing a photon of energy 8 eV. What is the most likely energy of the photon that will be emitted by the electron when it moves back down to energy level 1? 2 ev 4 ev 8 ev 12 ev What is the best

9. ## biology

if DNA replication were conservative, what sort of bands would you expect from the CsCl density gradient centrifugation?

10. ## Math

Javier rode his bike for a total of 41 minutes. Before lunch, he rode for 1 minute less than 5 times the number of minutes he rode after lunch. How many minutes did Javier ride before lunch?

11. ## Calculus

How do I find the radius of convergence of a series where n=1 to infinity of (14^(n)x^(n)n!)? I have tried using the ratio test but I eventually get to this step: lim as n approaches infinity of absolute value of (14x(n+1)), which equal infinity. How am I

12. ## Pre-Calculus

Let f(x) = [(√x)-7]/[(√x)+7]. What is f'(x)? What is the easiest way to find the derivative of this? Should I remove all the radicals and use quotient rule, like f'(x)= ((x^0.5) + 7)(0.5x^-0.5) - ((x^0.5)-7)(0.5x^-0.5) / ((x^0.5) + 7)^2 Is this right?

13. ## Calculus

What is the radius of convergence of the power series (((2n)!x^(n))/((2n-1)!)), and what is its interval of convergence? I used the ratio test and found that the radius of convergence is 0, as it is impossible for the absolute value of infinity to be less

14. ## Substution Soluton MATH

1. y= -5x+2 y=3x-14 2. x+y=0 5x+y=4 3. 6x+2y=4 4x+2=8

15. ## science

The two tables below give the relative-risk of developing a stroke, in relation to blood pressure and body mass index. The data are based on a population of men from the USA. The values in the first table are given in comparison with the total population.

asked by sam ????????????????????
16. ## Physics

At t=0, a particle leaves the origin with a velocity 6m/s in the positive x direction and moves in the x-y plane with a constant acceleration (-2i-4j)m/s2 How far the particle from the origin at t=1 ?

17. ## Science

Is a cucumber a fruit or a vegetable?

18. ## Trigonometry

A calculator is broken so that the only keys that still work are the sin, cos, tan, cot, sin^-1, cos^-1, and tan^-1 buttons. The display initially shows 0. In this problem, we will prove that given any positive rational number q, show that pressing some

19. ## Calculus

How to integrate dx/(4-5 sin x) using t-substitution method(i.e. taking tan x/2=t)?

20. ## Science (urgent!)

Three characteristics of friction force and surface type. Three characteristics of friction force and mass. Three characteristics of friction force and surface area. I don't quite understand what they mean by characteristics, or what they want me to do.

21. ## math

1.62 is divible by which of the following numbers? A.1,3,31,62 B.1,2,3,31 C.1,4,16,62 D.1,2,31,62 I PICKED D. ------------------------------- 2.108 is divisible by which of the following sets of numbers? A.1,2,3,4,6,9,12,18,27,36,54,108 b.1,2,4,27,54,108

22. ## math

A small wheel of radius r is situated at the top of a ramp having an angle Î¸ = Ï€/3 rad At t = 0 the wheel is at rest and then it starts to rotate clockwise in the positive x direction with constant angular velocity Ï‰. Find the parametric

23. ## physics

A projectile launched straight upward at 141 m/s. How fast is it moving at the top of its trajectory? Suppose it is launched upward at 45° above the horizontal plane. How fast is it moving at the top of its curved trajectory?

24. ## Pre-Calculus

Prove that each equation is an identity. I tried to do the problems, but I am stuck. 1. cos^4 t-sin^4 t=1-2sin^2 t 2. 1/cos s= csc^2 s - csc s cot s 3. (cos x/ sec x -1)- (cos x/ tan^2x)=cot^2 x 4. sin^3 z cos^2 z= sin^3 z - sin^5 z

25. ## chemstry

How long will it take 200 mg of carbon-14 to decay to the point where only 75 mg remain if the half-life is 5770 years?

26. ## Forensic Psychology

Using multiple sources, defend your thesis on how and why therapeutic and forensic roles can or cannot be reconciled. Ensure that you argue for a particular side of the issue (not arguing both sides) and that your argument is well-supported by scholarly

27. ## math

four apples and 2 ponkans cost 53.two apples and four ponkans cost 75.how much will half a dozen apples and half a dozen ponkans cost?

28. ## chemistry

All these are consequences of the sole valence electron in alkali metals exept............. the metals are soft Good conductors of electricity the silvery luster Good conductor of heat

asked by miss cyndy

1. Write the equation for the horizontal line that contains point G(-8, 8). 2. What is an equation for the line that passes through points (-1, -4) and (1, 4)? Write the equation in slope-intersect form. 3. Write an equation for the vertical line that

30. ## Substituion MATH

1) -x+10y=60 -4x+16y=32 2) -1/2x - 1/4y=3 1/3x+1/6y=2

31. ## math

an architect has allocated a rectanguoar space of 324ft^2 for a square dinging room and a 12ft wide kitchen. find both width of the dining room and the length of the entire rectangular space.

32. ## math

a triangular traffic island has a base half as long as its height. the island has an area of 121m^2. find the base and the height.

33. ## math

north avenue is 36ft wide when it ends at main st. a 45 foot long diagonal crosswal allows pedestrians to cross main st to or from either corner of north ave. determine the width of main st.

34. ## math

a 20-foot ladder is placed against a vertical wall of a building, with the bottom of the ladder standing on level ground 16ft from the base of the building. how high up the wall does the ladder reach?

35. ## Math

8. How many cubic feet are in 3 cubic yards? A. 27 cu. ft. B. 5,184 cu. ft. C. 9 cu. ft. D. 81 cu. ft. I picked D,because there are 27 cubic ft. in 1 yd. So you would take 27 cubic ft multiply by 3, which equals 81 cu. ft. Is that correct?

36. ## Biology

What information does relative dating provide?

37. ## math

Point A(8,-10) is reflected over the y-axis. Write the coordinate of A'. a) (-8,-10) b) (8,10) c) (8,-10) d) (-8,10)

38. ## math

The length of the hypotenuse of a right triangle is 13 m. The length of one leg is 5 cm. Find the length of the other leg. a) 14 cm b) 144 cm c) 8 cm d) 12 cm

39. ## math

Find the length of the hypotenuse of a right triangle with legs of 9 cm and 12 cm. a) 8 cm b) 21 cm c) 15 cm d) 225 cm

40. ## statistics

if n=30 and p=.23 what is P(20,x,23)= and P(x.23)= I think I need to find the z scores in order to solve but how do I read the table or do I even need it. UGH! so confusing especially 20 years later.

41. ## Biology

How are bryophytes similar to green algae? How are they different?

42. ## Math

the average american drinks 29 more cokes per year than the average mexican. if together they consume 555 cokes per year how many cokes are consumed each year by the average american and how many by the average mexican? i also have to identify the

43. ## Anthropology

Tell me the thesis statement for the following: Gooding S.S. (May,1996),At the boundaries of religion identity Native American religions and American legal culture. Bialecki, J. (2008) Between stewardship and sacrifice; agency and economy in a Southern

44. ## Science

After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap in the geologic record? a. an earthquake or motion along a fault. b. new deposits of sediment must build up on the eroded area. c. folding of sedimentary

45. ## chemstry

How long will it take 200 mg of carbon-14 to decay to the point where only 75 mg remain if the half-life is 5770 years?

46. ## Physics

A copper wire of diameter 0.30mm and length 1.50m is joined to another steel wire of same diameter and length 1.20m. The copper part of the double wire is hung vertically to a fixed point, while a small weight is connected to the lower end of the steel

47. ## organic chemistry

Which proton gave rise to the peak that appears at 9.31 ppm on the 1H NMR?

48. ## Physics

A nurse pushes a cart by exerting a force on the handle at a downward angle 35 degrees below the horizontal. The loaded cart has a mass of 28.0 kg, and the force of friction is 60.0N. What force must the nurse exert to move at a constant velocity?

49. ## math

Point E is located at (-2,2) and point F is located at (4,-6).What is the distance between points E and F? a) square root of 52 b) square root of 28 c) 10 d) square root of 20

50. ## Algebra

Please help. This is my problem. Today the center City baseball team scored 10 runs . The day before yesterday they scored x. How many runs did they score in these two days.

asked by Sydney santillan
51. ## Statistics

The coding department of a large physician clinic is interested in purchasing a software program that will edit claims before they are sent out to billing. The license fee for the software costs \$34,000 per year. The software is expected to reduce the

52. ## Math

Please check my answers, which are at the bottom of each question...:) remove brackets a) 4(a+3) d) 5(2+d) 4a+12 10+5d b) 3(2b+2) e) a(3a-6) 6b+2 4a-6a c) 7(3c-1) f) 2(x+y) 21c-7 2x+2y simplify the following: a) a+a+a+a d) a2 xa3 4a a5 b) a x a x a e)

53. ## biorganic

equations of thereactions of both maleic acid and fumaric acid with (a) bromine (b) hydrogen chloride (c) catalytic hydrogenation.name the products of these reaction

54. ## Finance

If a firm just paid a dividend equal to \$4.00 a share, then for the WACC, in order to find the cost of equity, \$4 should be

55. ## Math...help

remove the brackets and simplify questions a) 3(2a+5)+2(a+7) b) 5(b+4)+10b c) 4(2c+3)+3(c-3) d) 8+6(d-2) e) 6(5e+3)-4(2e+3) f) 5(3f+2)-(f-5) MY ANSWERS a)6a+15+2a+14 8a+29 b)5b+20+10b 15b+20 c)8c+12+3c-9 11c-3 d)8+6d-12 I need to simplify more...how?

56. ## english

Need Help Please..!!! During the Victorian period, there were many social changes and intellectual developments. As a result, a crisis of faith rocked society. How does In Memoriam, A. H. H. by Alfred, Lord Tennyson reflect that crisis? a)Grieving, the

57. ## Math

1.62 is divible by which of the following numbers? A.1,3,31,62 B.1,2,3,31 C.1,4,16,62 D.1,2,31,62 I PICKED D. ------------------------------- 2.108 is divisible by which of the following sets of numbers? A.1,2,3,4,6,9,12,18,27,36,54,108 b.1,2,4,27,54,108

58. ## english

12. which of the following describes the reactions of government leaders to the second traveler in lines 15 and 16 inhospitable friendly dismissive supportive

59. ## Thomas Nelson

What is chromatin?

60. ## Math/Infinity

Explain why the union of two countably infinite sets with nothing in common is also countably infinite. I said that it was because the two sets are in one-to-one correspondence with each other. Is this right?

61. ## physics

A car is traveling around a circular banked road without friction which is inclined at 72 degrees which has a vertical height of 25 meters. When the car is traveling at 16 m/s around the road, it is moving at the bottom on the incline (inner radius of the

62. ## English

which of the following statements about american romantic poetry is not true? A)it followed a fixed rhyme scheme B)its themes originated in British literature C)it was influenced by Gothic literature D)it was filled with emotion

63. ## Math

I would just like someone to check my work and make sure I am doing it correctly before I continue. f(x)=x^2-3x+5 1. f(2) I got f(2)=-7 and g(x)=5x-1 1.g(-3) I got g(-3)=-16 Thanks for any help!!

64. ## Physics

A flowerpot falls from a window sill 28.6 m above the sidewalk. What is the velocity of the flowerpot when it strikes the ground? The acceleration of gravity is 9.81 m/s2 . Answer in units of m/s

65. ## international relations

I need help on writing a thesis statement on why this century will remain unpredictable I need it in either a realism liberalism contructism referring to international politic relations

66. ## Science

If you wanted to consult the geologic period for when the first vertebrates evolved, where would you look? a. in the section for the Ordovician period of the Paleozoic era. b. in the section for the Quaternary period of the Cenozoic era. c. in the section

67. ## physics

A TRAIN CAR OF MASS 4753 KG MOVING AT 8.0 M/S COLLIDES WITH TRAIN CAR OF 5000KG WHICH IS MOVING IN THE SAME DIRECTION 3.0 M/S WHAT IS THE VELOCITY

68. ## Personal finance

Investing in which of the following funds will give you the least diversification. A. Growth Funds B. Capital appreciation funds c. Equity income funds d. sector funds

69. ## econ

Market demand facing a monopolist is Qd=-5P+20. If the monopoly practices perfect price discrimination, what is the profit-maximizing level of output when MC=\$2?

71. ## Science

When you inhale, where is there more oxygen, in the lungs or body.

72. ## Calculus-Applied Optimization Problem

If a total of 1900 square centimeters of material is to be used to make a box with a square base and an open top, find the largest possible volume of such a box.

73. ## 3rd grade math

sara wants to know how many boxes of cookies her entire girl scout troop sold. How could she use compatible numbers to find the sum? kate 52 boxes sara 43 boxes jen 18 boxes haliey 27 boxes

74. ## socialstudies

before I start I wanna say I don't known of this and don't have a book help ---------------------------------------------------------- 1.greece's economy prospered thanks to A.the arts B.philosophy C.trade D.architecture

75. ## Science question

What would happen to the current model of the atom if new information about it’s structure is discovered in the future? Would it be revised, strengthened,proven or defended?

76. ## Science >.<

if a wave is traveling at 60cm/second and has a wavelength of 15cm what is the frequency? Please explaine

77. ## Science

Determine the frequency of a microwave 6.0 cm in length.( A microwave is an electromagnetic wave.It travels through space at a speed of 3.0 x 10 ^8 m/s)

78. ## Physics

Calculate the tension in the two ropes if the person is motionless. Person weighs 76kg and 15 degree angle rope one and 10 degree angle rope 2

79. ## ps 361

there are 16 horses. 8 chickens are white. 7 horses run away. how many horses are left?

asked by yasmine berger
80. ## English

He won first prize for the solar lamp in the science fair. (What is the meaning of 'for' in the sentence? Is 'for the solar lamp' an adjective phrase modifying 'prize' or and adverbial phrase modifying 'won'?)

81. ## Health

Armando's coach is going to be late for soccer practice. As the team captain, it is Armando's responsibility to lead the teams for their warm-up activities. To prepare his team, Armando should direct his team to do which of the following? a. jog around the

82. ## 1800s Inventions

describe a modern-day invention that has replaced and/or advanced the 1800s invention and explain how it is more productive in today's society. 1. Cable cars 2. Telegraph 3. Telephone 4. Typewriter 5. Phonograph 6. Motion picture and projector 7. Lightbulb

asked by Reina B.
83. ## math

Sam purchased a used car for \$14,750. He put \$2,000 down and financed the rest with a 48-month, 7.5% loan. What is his monthly car payment? Round your answer to the nearest cent.

84. ## Calculus-Applied Optimization Quiz Problem

A rancher wants to fence in a rectangular area of 23000 square feet in a field and then divide the region in half with a fence down the middle parallel to one side. What is the smallest length of fencing that will be required to do this?

85. ## geometry

what is the value of the variable and bc if b is between a and c if AB=17, BC=3m, AC=32

86. ## algebra

A triangle has points A(2, 2), B(2, 4), and C(6, 3) and is reflected over the x-axis. A'B'C' are the coordinates of the reflected image. What is the B' coordinate

87. ## Pre-Calculus

I don't understand,please be clear! Prove that each equation is an identity. I tried to do the problems, but I am stuck. 1. cos^4 t-sin^4 t=1-2sin^2 t 2. 1/cos s= csc^2 s - csc s cot s 3. (cos x/ sec x -1)- (cos x/ tan^2x)=cot^2 x 4. sin^3 z cos^2 z= sin^3

88. ## English

What year and date was st Martina born?

89. ## Science

Which of the following is a disadvantage of external fertilization. a) gametes are released into the surroundings b) gametes are washed away c) the developing zygote is protected d) large number of eggs can be produced at one time

90. ## English

Do you know of 2 facts of st Sebastian ?

91. ## math

Sam opened a money-market account that pays 2% simple interest. He started the account with \$7,000 and made no further deposits. When he closed the account, he had earned \$560 in interest. How long did he keep his account open?

92. ## Finane

The possibility that the fed may raise the discount rate is an example of A. Political Risk B. Exchange rate risk c. interest rate risk d. liquid risk

93. ## Geometry

A ladder 12 m in length rests against a wall. The foot of the ladder is 3 m from the wall. What is the measure of the angle the ladder forms with the floor?

94. ## English

In Edward Spenser'r The Faerie Queene, how should we interpret the crowded and slightly comical scene at the beginning of Book 1?

95. ## math

Group 1 Group 2 Group 3 1/3 / 9 12 / 1/6 5/6 / 1/2 1/6 / 12 5 / 2/3 3/4 / 3/4 3/5 / 6 3 / 2/5 9/5 / 1/2 Group 4 5 / 1 1/2 1/2 / 3 2/3 3 1/3 / 2/3 1 Describe what the problems in each group have in common.

96. ## US History Mrs. Sue

Select the group that best embraced the beliefs of Abraham Lincoln. Abolitionists or The Free Soil Party. Is it Abolitionists.

97. ## algebra 2

the 2 unequalities -26

98. ## algebra

This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

99. ## Calculus-Applied Optimization Problem

The manager of a large apartment complex knows from experience that 100 units will be occupied if the rent is 425 dollars per month. A market survey suggests that, on average, one additional unit will remain vacant for each 9 dollar increase in rent.

100. ## Everest

The Greek philosopher Socrates cautioned, "The unexamined life is not worth living." (Points : 4) True False

101. ## Finance

Wanda Clark expects interest rate to decline in the next few months. To maximize her earnings, she should put her savings in a A. 2-year cd B. 6-month cd c. money market d. passbook savings account

102. ## ut

The acidity constant of acetic acid is 1.8 × 10-5. Calculate the % error of the measured Ka value.

103. ## Algebra (factoring Polynomials)

9w-w^3 2a^2+1+3a

104. ## Math

A model rocket is launched with an initial velocity of 212ft/sec. It's height h, in feet, after t seconds is given by the formula h=212t-16t^2. After how many seconds will the rocket first reach a height of 592ft?

105. ## math 5th grade

Jill has 5 pictures to hang on her wall she wants to hang one picture in the center if the picture remains the same how many diffrent ways can she hang the other pictures

asked by jasmyne ayala
106. ## Math

An architect has allocated a rectangular space of 325ft^2 for a square dining room and a 12 ft wide kitchen. Find both the width of the square dining room and the length of the entire rectangular space.

107. ## Algebra 1

Can someone help me I really don't get this one The table shows the number of trolley buses in operation in the United States during certain years. Describe the rates of change in the number of buses during the time period. (Table) Year 1980 1985 1990 1995

108. ## Finance

which of the following is true with regards to rising interest rates? A. Use Long-term loans to take advantage of current low rates. B. The term of the loan option is not impacted by rising interest rates. c. Use Short-term to take advantage of low interst

109. ## business law

Adam Chandler, star pitcher for the Olney Jayhawks, was warming up in the bull pitches to a catcher, during game 3 of the World Series where they were facing their hated rivals the Texas Loudmouths. Throughout this warm-up, the Texas fans were being very

110. ## Medical Billing & Coding

You've started your first day at Venture Outpatient Surgery Center. Code the Following operative report: Operative Report PREOPERATION DIAGNOSIS: Left flank soft tissue mass POSTOPERATIVE DIAGNOSIS: Left flank soft tissue mass SURGEON: John Doe, DO

111. ## Medical Billing & Coding

The ICD-PCS system uses a tool coders have never used before. What is it? a. Incisional biopsy b. excisional biopsy

112. ## Math HELP URGENT!

Find the LCD of the ration expressions: A) [9x/(x^2-z^2)] [3/(x^2-2xz+z^2)] B) [x/(x^2-64)] [2/(40-5x)] [7/x]