# Questions Asked onMay 6, 2013

1. ## Math

A researcher tagged 40 giant turtles in 2008. In 2009 , she returned and captured 50 turtles , 16 of which were tagged. In 2010 , she returned again and captured 30 turtles , 8 of which were tagged. a) Use a proportion to estimate the turtle population for

2. ## Physics

A ray of light of vacuum wavelength 550 nm traveling in air enters a slab of transparent material. The incoming ray makes an angle of 34.3◦ with the normal, and the refracted ray makes an angle of 18.9◦ with the normal. Find the index of refraction of

3. ## physics

each step of a ladder increases one's vertical height 40.0cm. If a 90 kg painter climbs 8 steps of the ladder, what is the increase in potential energy?

36. ## Physics

At an outdoor market, a bunch of bananas is set into oscillatory motion with an amplitude of 30.0781 cm on a spring with a spring constant of 15.7711 N/m. The mass of the bananas is 69.6297 kg. What is the speed of the bananas? Answer in units of m/s

37. ## math

A small grill can hold two hamburgers at a time. If it takes 5 minutes to cook one side of a hamburger, what is the shortest time needed to cook both sides of five hamburgers? 30 15 20 25

38. ## chemistry

The pKb of ammonia solution, NH3(aq) is 4.76. A buffer solution contains NH4Cl and NH3, has a pH of 9.45, and a total ammonia concentration (all forms) of 0.400 M. What is the concentration of NH4+? (Hint: [NH4+] + [NH3] = 0.400 M)

39. ## college physics

a water skier is being pulled by a tow rope attached to a boat. as the driver pushes the throttle forward,the skier accelerates. a 70.3kg water skier has an initial speed of 6.10m\s. determine the work done by the net external force acting on the skier.

40. ## science

An atom loses an electron. What will happen when it approaches a positively-charged ion? A. The ions will repel each other. B. The ions will attract each other. C. The ions will cancel each other out. D. The ions will neither attract nor repel each other.

41. ## Physics

Having landed on a newly discovered planet, an astronaut sets up a simple pendulum of length 1.29 m and finds that it makes 407 complete oscillations in 698 s. The amplitude of the oscillations is very small compared to the pendulum’s length. What is the

42. ## Statistics

A true-false test consists of 20 questions, each of which has one correct answer: true, or false. One point is awarded for every correct answer, but one point is taken off for each wrong answer. Suppose a student answers every question by guessing at

43. ## Physics

A steel piano wire, of length 1.0 m and mass 4.4 g is stretched under a tension of 650.0 N. What is the speed of transverse waves on the wire?

44. ## ENGLISH

5. Which one of the following sentences contains an unnecessary colon? A. Here's the question on all of our minds: Will our team be able to defeat their arch rivals tonight? B. My store list included: milk, soup, chicken, and ice cream. C. She wants one

45. ## Physics

A roller coaster works by gravitational energy. The coaster car is pulled up to a high point and then released, rolling downwards on the track through all manners of curves and loops. I have a short roller coaster car that I pull up to the top of a hill of

46. ## justice system

1. “Substantive due process” refers to: A. the content of a law. B. the application of law. C. the application of penalties. D. criminal procedure. is it A 2. __________ is the act of taking a person into custody. A. Search and seizure B. Arrest C.

47. ## Maths

Ship A is 18.5km from a port P on a beearing of 045 degree and ship B is 26.4km from point P on a bearing of 105 degree. Calculate the bearing of A from B and the distance AB.

48. ## Physics

A steel piano wire, of length 1.0 m and mass 4.4 g is stretched under a tension of 650.0 N. What is the speed of transverse waves on the wire?

49. ## Math

What is an example on how to use fractions used in graphic design.

50. ## life orientation

What are the environmental factors that causes ill health or accident or diseases

51. ## physics

a .45 kg ball attached to the end of a horizontal cord is rotated in a circle of radius 1.3 m on a frictionless horizontal surface. if the cord will break when the tension in it exceeds 75N what is the maximum speed the ball can have?

52. ## health

(A) identify and describe 3 environmental health hazards that cause ill health, crises, and or disaster within your community or any other community within south africa and globally. Include evidence that is current of the identified issues.( b)critically

53. ## Math help please ASAP

2. Simplify the polynomial. –3f^2 + 4f – 3 + 8f^2 + 7f + 1 5f2 – 11f + 2 11f2 + 11f + 2 5f2 + 11f – 2 –5f2 + 11f – 2 No idea how to do this please explain!!!!

54. ## math

Brianna works at a sunglass shop. She earns $9 per hour and a$1 commission for each sale she makes. From July 1 to July 5, she saves all her money and doesn’t spend anything. Each day, from July 1 to July 5, Brianna worked 4 hours. • On July 1,

55. ## WorldHistory

significant consequences of the Agricultural Revolution. EFFECT ON WOMEN LIVES: The British Agricultural Revolution was the cause of drastic changes in the lives of British women. Before the Agricultural Revolution, women worked alongside their husbands in

56. ## Health

WITH STARS IS MY ANSWER! (*) 1) A drug created by a chemical reaction in some foods, especially fruits and grains A= neurons B= cirrhosis C= alcohol ****** D= depressant 2) Being drunk A= intoxicated ****** B= withdrawal C= alcohol D= minor 3) Cells that

57. ## Social Studies

In China, Confucius wrote down his philosophy which explained how people should live their lives. Confucianism teaches that each person should accept his or her role in society. Confucisanism became the basis for order and respect and was central in

58. ## maths

The product of the digits of a positive two-digit number exceeds the sum of the digits by 39. If the order of the digits is reversed, the number is increased by 27. Find the number.

59. ## Physics

Consider the series RLC circuit in which R2

60. ## physics

Three charges lie along the x-axis. At x = 2.0m, a charge of 15x10^-6 C is fixed. At the origin, a charge of 30x10^-6 is fixed (like in question #8). Where can a third charge be placed between them so it feels no net force?

61. ## Retirement

1. I would like to retire in 42 years at the age of 65. The average retirement age for women is between 60-62 years of age, and 62-64 for men. 2. My annual amount of money I'll need after retiring would be approxiamately $26,500 (2,205*12=$26,460) using my

62. ## Physics

a. 2 objects each of mass 200 kg and 500 kg are separated by 50 cm. Where body of mass 20 kg should be placed so that the resultant force of gravity experienced by objects equal to zero? b. launched a rocket leaving Earth. Known radius of the earth 6.4 x

63. ## physics

A 16 lb block rests on a horizontal frictionless surface. A cord attached to the block, running horizontally, passes over a pulley whose diameter is 1 in, to a hanging block weighing 16 lb. The system is released from rest, and the blocks are observed to

64. ## chemistry

determine the number of representative particles in each of the following and identify the representative particle: 11.5 mol Ag; 18.0 mol H20; 0.150 mol NaCL.

65. ## Math

The local dinner offers a meal combination consisting of an appetizer, two soups, four main courses, and five desserts. Your diet retricts you to choosing between a dessert and an appetizer. (You cannot have both). Given this restriction, how many

66. ## chemistry

how many grams of carbon dioxide can be produced when 15.g of oxygen is reacted with 25.g of c2h2

67. ## math

A weather states that there is a 60% chance of rain on Saturday and a 60% chance of rain on Sunday. Explain why the chance of rain on Saturday and Sunday isn't equal to 120%.

81. ## life orientetion

What are 5 ways in which you critically discuss how the lifestyle disease impact on the teenager?

82. ## Function

Fahrenheit and Celsius are two measures of temperature. The temperature in degrees Celsius is equal to five ninths of 32 less than the temperature in degrees Fahrenheit. What is a function rule that represents this situation?

83. ## UDC

Utilizing a public policy of your choice from a local government where you reside, prepare a paper assessing that government’s revenues and examining possible funding options for the chosen public policy. Utilizing the local government’s annual

84. ## Math

A rubber ball is thrown straight down from a height of 244 feet at speed of 80 feet per second. If the ball always rebounds with one-fourth of its impact speed, what will be the speed of the ball the third time it hits the ground? My Answer is: 1/4*80=60

85. ## Math

You and six of your friends will go on a roadtrip. A seven passenger minivan is rented for the weekend. How many different ways can you and your friends sit in this vehicle?

103. ## parabolas

Find the equation and sketch the parabola that has vertex V (-1; 0) and focus F(-4; 0).

104. ## gas stoiciometry

What volume of ammonia gas will be produced when 1.44 L of nitrogen react completely in the following equation? N2 + 3H2 = 2NH3

105. ## Math

What is the measure of the side of a cube if the volume is 27000cm3?

106. ## Physical Science

1. What is molarity of products? I can't decide if it's a. The concentration of the reactants measured in mol/L of solution or b. The concentration of the products measured in mol/L of solution 4. How does pressure relate to reaction rates? I'm stuck

107. ## ENGLISH

6. Which of the following sentences contains correct usage of its/it's? A. Its only a game. B. Let's go out on Friday; it's my birthday! C. The dog chased it's tail until it got dizzy. D. My grandmother always said, "Its not if you win or lose, but how you

108. ## embryology

what is gud book to study about embryology

109. ## Physics

Consider the following standing wave, (all units are SI) z=0.2sin(0.4y)cos(350t) (a) The values of t where the displacement at all values of y equals to zero are of the form : t=c+dn, where n=0,±1,±2,3, etc. What is c? What is d?

110. ## math

there were twice a many black cars as red cars in the parking lot. there were 36 total black or red cars in the parking lot. How many red and how many black are there?

117. ## science

how many oxygen atoms are in 773.2g of carbon dioxide? and also what is the molar mass of an element where 3.4 moles of the element has a mass of 669.69g? which elent is it?

118. ## math

Fred arrives at the subway station every day at a random time and takes the first train that arrives. If he takes the A train, which arrives each hour on the hour, he ends up at the fitness center. If he takes the B train, which arrives every hour 15

119. ## math

One of your dresser drawers contains 10 black socks and 10 blue socks. Suppose it is dark and you can’t tell what color a sock is when you look at it. If you start taking socks randomly one at a time from the drawer, how many would you have to take to

120. ## physics

a ball is dropped from a point heiht above the ground.on striking the ball it rebounds with a small speed as it strikes with the ground and would hence come up to same height from were it was dropped and motion remained infinetly?draw x-t gaphs?

121. ## mill creek high

what are some examples of archetype in the book

122. ## Sports : Softball

I am always in sports. i have been playing softball lately and my arm starts to hurt when i throw sometimes it get so bad that the pain goes to my elbow. i can say it is noticing when i play that i am not throwing as hard as i can and then i git yelled at

123. ## maths

The magician, The Great Ziginy, is planning his next world tour. He knows a total of 7 different illusions but he only has time to perform 4 of them at any show. The Great Ziggy does not want any two of his shows to be identical, so they cannot contain the

124. ## math

question 1 use the laws of logarithms to simplify the expression Inx(x+2)(x+1) question 2 (18m^2n+6m^3n+12m^4n^2)/ (6m^2n)

125. ## Math, Gr 10

A rectangular field is to be enclose by 800 meters of fencing and the fourth side with be along the side of a barn. A) What dimensions will give the maximum area? B) What is the maximum area?

126. ## Chemistry

Calculate the volume of 2.45 M NaI that would be needed to precipitate all of the Hg+2 ion from 185 mL of a 2.44 M Hg(NO3)2. AND Calculate the molarity of an acetic acid solution if 47.81 mL of the solution is needed to neutralize 147 mL of 1.32 M sodium

127. ## math

Flora’s class collected 236 books. They are placing the books in boxes. If each box holds 8 books, how many boxes can they fill? if there are books left over, what portion of the last box will be filled? 30 full boxes 29 full boxes and 1 box that is full

128. ## math

Three forces act on a hockey pick as it slides across the ice; the normal force N represents the force the ice exerts upward on the puck and is given by N= , the gravitational force G represents the downward force of gravity on the puck and is given by G =

129. ## stats

What does the best estimate mean after doing the liner regression equation

Mr. Wood went to the stores to buy school supplies for his children. He spent half of his money plus $5 at Store A. He then spent half of his remaining money plus$10 at Store B. At the end he had $25 left. How much money did Mr. Wood start with? asked by Cheryl 131. ## Physics A transverse wave traveling in a string takes 1.61 s to move 13.2 m. The mass of a 9.2 m piece of the string is 1.5 kg. What is the tension in the string? asked by Maegan 132. ## Maths Please help me.Iam stuck. Find all the possible values of theta between 0 degree and 360 degree for the following quadratic equation. State the quadrants in which each angle lie. 8 tan^2 theta + 2 tan theta=15 asked by Shane 133. ## Life Science If a sponge (from the ocean, not a cleaning sponge. :P) were torn apart by a predator, what would happen? asked by Whitney 134. ## Social Studies I need a 4 paragraph essay on the devil's arithmetic. my theme is "no laugh, no hope. NO hope, no life." THANK YOU (: im not passing and i reallllllly neeed help on this asked by Kali 135. ## life orientation identify and describe three environmental health hazards that cause ill health,crises,and or disasters within mamelodi asked by thabang 136. ## statistics A player pays a$1 to play a game. With probability 0.001 the player wins $900, with probability 0.005 the players wins$10. What is the players expected win per game?

A hydrogen atom, when vigorously perturbed, can emit light with a frequency of 6.16·1014 Hz. When the same light from hydrogen atoms in a distant galaxy is observed on earth, the frequency is 5.76·1014 Hz. Calculate the speed at which the galaxy is

138. ## Trig

cos[(tan^-1(3/4))+(cos^-1(9/41))]

169. ## Maths

168 children went to a them park. If 1/3 of the girls is equal to 4/9 of the boys, how many boys went to the theme park?

170. ## science help plzzzzzzzzzzzzzzz?

A planet orbiting a star is occasionally hit by comets. Each comet has a mass of 4.8 × 10^6 kg of which 30% is rock and 70% is water ice. Each time a comet hits the planet 40% of the mass of the comet is vaporised and the rest is added to the planet,

asked by john help me with this question plz
171. ## WorldHistory

What factors led to Robespierre becoming a dictator? Beginning with the execution of Louis XVI in January 1793, France faced an increase in food riots, large popular insurrections and devastating treasonous acts by those thought to be patriots. Also,

172. ## hurry! math

Find the value of x in 125^x-2 + 125^x-3 = 125^x-4.with explanation

173. ## physics

While waiting to board a helicopter, you notice that the rotor's motion changed from 340 rev/min to 265 rev/min in one minute. Assuming that this acceleration remains constant, calculate how much longer (in seconds) it will take for the rotor to stop.

174. ## Chemistry

A certain gas has a solubility of .50 g/L under a pressure of 1500 torr. What would its solubility be a 2250 torr?

175. ## Probability and Statistics

There are 15 marbles in a jar.Five are red,four are blue, and six are yellow.If you draw two blue at random (without replacement), what is the probability that the second marble is blue?

176. ## chemistry

What is the difference between the two strong acids, nitric and hydrochloric acid, when they behave as the oxidised forms in a reduction half-equation?

177. ## Math

The AC voltage coming out of a standard wall plug in the United States can be expressed as the function V(t) = 120sin(120*pi*t), where t represents time (in seconds) and V is the voltage. We will let t be greater than or equal to 0 for simplicity. A. Make

178. ## Maths

Please help me.Iam stuck. Find all the possible values of theta between 0 degree and 360 degree for the following quadratic equation. State the quadrants in which each angle lie. 8 tan^2 theta + 2 tan theta=15

179. ## life orientation

discuss 10 ways in which the environmental health hazard can impact negatively in one's health

180. ## Trig

csc thea= -2, quadrant 4. what are the six trig functions?

181. ## maths

Please help me simplify this and show full working out. (a) (2x^3 divide 3y^4)^2 multiply (x divide 3y)^-2 (b) a-a^-1 divide a^2 - 1 (c) 3^a+2 times 9^2a+1 divide by 6^2 times 3^5a+3

182. ## history

Which of the following is true with regards to The Navigation Acts by the eighteenth century? A- In general, the colonist despised the acts and smuggling was rampant. B- The Navigation act of 1696 abolished the American customs service. C- The colonists

183. ## stats

Does the regression line equation change if you change the independent and dependent variable

184. ## management science

Suppose the results of an IQ test are normally distributed, with a mean of 10 and a standard deviation of 16. If 150 people took the test, how many do you expect would score between 95 and 130?

185. ## maths

Please I need help.Show full working out. (a) sin x cot x= cos x (b) (1 + tan theta)^2 + (1- tan theta)^2 = 2sec^2theta

Bryan is putting fencing around his new rectangular vegetable garden. He uses 140ft of fencing material. How wide is the garden? Ther is a rectangular diagram that shows the bottom number is 40ft

187. ## Algebra 2

Find the expansion of (r + 4)^3. r^3 + (3r^2)(4) + 3r16 + 64?

What is 508 times 7?Thanks if you help:)

189. ## algebra

how do i figure: (-12a^2b^6)^3 over (9a^3b^9)^3

190. ## life orientation

In 10-15 lines critically discuss 5 ways in which the environmental problems impacts on the community. Provide relevant source to support you answer.

191. ## chemistry

When boiled with concentrated aqueous alkali, fats and oils dissolve, but waxes do not. Explain the difference.

192. ## Physics

A typical model rocket has a mass of 50 g. Similarly, a typical "class C" model rocket engine can produce a total impulse of 10 Newton-seconds. We usually launch model rockets vertically, but if I instead launched this rocket horizontally, how fast would

193. ## Math: Surface Area

How would you find the area of the curved surface between the top and bottom of a can?

194. ## Math

If 10 degrees f rises 6 degrees, what is the temp?

195. ## ?

What does titi mean

196. ## immunology

do monocytes derive from killer T cells?

197. ## chemistry

We have a tank that contains O2 at 146 mmHg, N2 at 146 mmHg, and CO2 at 138 mmHg. We then add 135 mmHg of Ar. What is the pressure in the tank?

198. ## math

I have 50.00 to buy 50 animals. Chickens are .50, cows are 2.50,and birds are 5.00. How many of each animal can i purchase?

199. ## human life

critically discuss 10 ways in which air pollution can impact negatively on health

200. ## social studies

Why were Palestinians kicked off their land by the Jews?

201. ## Math (Probability)

Four players are playing a game involving choosing squares on a grid of size 3×8. Each player chooses a random square on the grid, then all players reveal their choices and a token is placed in the center of each of these squares. The probability that the

202. ## chemistry

how many grams of iron (iii) nitrate are needed to produce 25.0 g of iron (iii) sulfate form sulfuric acid?

203. ## Math Multiplying Fractions

Multiply. Simplify if you can 1. 1/4x5/6= 5/24 2.3/7x3/4= 9/28 3.4x1/5=4/5 4.5/12x2=5/6 5.3/5x10= 6 6.2/3x3/8= 1/4 7.1/7x1/7= 1/49 8.2/9x1/2= 1/9

204. ## Algebra

What is the sum of all positive integers N

205. ## Math

The president has a brother the brother dose not have a brother how is this possible?

206. ## Derivatives

I have gotten so many different responses from mine on this question Can someone PLEASE write out the steps for me for this. Thanks f'(x)= 2x/(x^2+1) Find the second derivative. I get 4x^3 + x^2- 12x + 1

What is the sum of all positive integers N≤1000 such that N equals 13 times the digit sum of N?

208. ## chemistry

Calculate the concentration of each solute and each ions when 25.0 mL of 18.0 M H2SO4 is mixed with 130.0 mL water

209. ## Math Multiplying Fractions

Multiply. Simplify if you can. 2.1/3x2/5=2/15 4.2/5x3/7=6/35 6.1/6x3/5=3/30 8.9/10x4/5=36/50 10.11x3/4=33/4=8 1/4 12.4/9x2/3=8/27

210. ## calculus

Set up the integral that would be used to find the volume of the solid obtained by rotating the region bounded by y=x^3 , y=8, and x=0 about the x=-4. use disk/washer method.

211. ## math

Consider the region bounded by the curves y=5 and y=5 and y = x +4/x. set up the integral that would be used to determine the volume if the region was revolved about x = -1

212. ## math

a musical triangle has a perimeter of 180 mm. the side of middle length is 2 times as long as the shortest side. the longest side is 3 times as long as the middle side. how long is each side

213. ## Chemical engineeing

Can someone help me with online exam ( fundamental of chemical engineering class ) ? Please eamil me ( davd_jo(at)(ya h o o )dot (com ) I'll offer money

214. ## 5th grade math (word problems)

Can you explain how to do the following problems? 1. Order these fractions from Greatest to least. 3/12, 5/8, 1/4, 7/8, 4/16 work: find least common denominator 3/12 = 12/48, 5/8 = 30/48, 1/4 = 12/48, 7/8 = 42/48 answer = 7/8, 5/8, since 3/12 and 1/4 are

215. ## life orientation

In 10-15 lines critically discuss 5 ways in which the human or environmental problem impact on the community in related to substance abuse

216. ## Physics

In a series AC circuit, R=20(ohms), Xl=10(ohms), and Xc=25(ohms), where the frequency is 400 Hz. Find the resonant frequency of the circuit.

217. ## is this correct algebra 1

(x^2 -5)+ (4x^2 -3) 5x^2-4x-15-20x 5x^2-24x-15

218. ## life orientation

In 10-15 lines critically discuss 5 ways in which the pollution as the environmental problem impacts on the community.provide relevent sources to support your claim

219. ## Science

Where can liquid manure be obtained from?

220. ## Science

How a lack of nutrients in the soil can affect plant growth?

221. ## Math Multiplying Fractions

14.16x5/12=80/192 16.1/5x10/11=2/11 18.1/10x4/7=4/70=2/35 20.5/9x18=90/9=10

241. ## Physics

In the following circuit R_1=3 Ohm, R_2=10 Ohm, C=0.003 Farad, V=5 Volts. At time t =0 we connect the power supply to the circuit. At t=0 the capacitor is uncharged. (a) What is the time constant tau (in seconds) to charge up the capacitor? (b) What is the

242. ## Physics

Consider a glass with full of water of mass density ρ=1,000 kg/m3 and height h=20 cm. There's a circular hole in the bottom of the glass of radius r. The maximum pressure that pushes the water back into the hole is roughly (on the order of) p=σ/r, where

243. ## Math

The Distance from the top of a cliff to the water below ranges from 13m(low tide) to 8m(high tide). Low tide occurs at 12:00 noon and it takes six hours between low tide and high tide. a)Develop an equation representing the distance in terms of time b) It

244. ## Math

Where does the equation cross the y-axis Y=1.25x+37

245. ## Ngono

What is alcoholism?

246. ## maths

For all positive integers n, let f3(n) be the representation of n in base 3, considered as a number in base 10. For example, since 5 in base 3 is 123, so f3(5)=12. What is the sum of all positive integers n such that f3(n)=8⋅n?

247. ## Math (Algebra)

If the sum of 3 non-zero distinct real numbers a, b, and c is 2, and the two sets {a,b,c} and {1/a,1/b,1/c} are the same, what is the value of a^2+b^2+c^2? Note: Two sets are the same if there is a one-to-one correspondence between their elements. For

248. ## statistics

A random number generator draws at random with replacement from the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. In 5000 draws, the chance that the digit 0 appears fewer than 495 times is closest to 25%,30%,35%,40%,45%,50%

Fabio stands atop his 16 foot ladder when he realizes that the ladder is slipping down the side of the building. He decides that the base of the ladder is moving away from the bottom of the building at a rate of 2 feet per second when it is 3 feet from the