# 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. ## WorldHistory

3.How was Napoleon able to control the countries neighboring the French Empire? He placed French garrisons in the countries. Made members of his family their head of state who in turn acknowledged Napoleon's will. He required them to supply him with

4. ## math

Which is the best display for the set of the number of tornadoes in the United States each year , If you want to be able to identify the mode? a) histogram with intervals of b) frequency table with intervals of 3 c) line pot d) line graph

49. ## 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.

50. ## Math

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

51. ## Chemistry

we burn 12.50L of ammonia in 20.00L of oxygen at 500 degrees celsius. What volume of nitric oxide, NO, gas can form? what volume of steam, H2O (g) is formed? Assume that all gases are at the same temperature and pressure, and that the limiting reactant is

52. ## Trig

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

53. ## life orientation

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

54. ## statistics

The probablility that a person drinks at least five cups of coffee per day is .24, and the probability that a person has high blood pressure is .08. Assuming that these two events are independent, find the probability that a person selected at random

A student in a parked car honks the horn, which has a `proper' frequency of 320 Hz. An observer in an approaching vehicle measures the frequency of the sound to be 355 Hz. Calculate the speed of the approaching vehicle. Use 340 m/s as the speed of sound in

56. ## Biology

How does the changes in the DNA code from CTT to CAT in the beta chain of haemoglobin affect cell activity?

57. ## 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

58. ## Mathematics

the scale on a map is given as 1:2000000. the distance between two towns on the map is 4.3. what is the actual distance between the towns in cm (squared)?

59. ## life orintation

Discuss 5 ways in which the water pollution problem impact on the community.provide relevant sources to support your claims

60. ## 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

61. ## 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.

62. ## Functions?

find the range of f(x) = -2x+6 for the domain {-1,3,7,9}

63. ## physics

Charged spheres A and B are in fixed positions (like in question #6) and have charges 3.6x10^-6 C and -5.4x10^-6 C respectively. Calculate the net force on sphere C, which has a charge of -9.9x10^-6 C.

64. ## 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?

65. ## 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

66. ## Physics

Consider the series RLC circuit in which R2

67. ## 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

68. ## 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

69. ## 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

70. ## 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

71. ## 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

72. ## 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?

73. ## 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

74. ## Finance

4.A thirty year US treasury bond has a 4.0 percent interest rate.In contrast, a ten year Treasury bond has an interest rate of 2.5 percent. A maturity risk premium is estimated to be 0.2 percentage points for the longer maturity bond. Investors expect

75. ## 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

76. ## 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?

77. ## 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.

78. ## Physics

-Estimate the total binding energy for copper? in MeV -Estimate the energy, in joules, needed to break a 3.0g copper penny into its constituent nucleons? E= in Joulea Please help me I am confused...thanks

79. ## math

What is x^2+6x-91 when factored ???!!

80. ## 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.

81. ## Chemistry

A salt solution is evaporated to dryness. If 66.5 g of the solution leaves 1,492 mg of dry salt, what is the percent concentration (w/w) of the salt in the solution?

82. ## life orintation

name two community/organizations that are invloved in supporting or giving redress to drought

83. ## 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

84. ## 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

85. ## 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

86. ## 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,

87. ## 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

88. ## Math

Suppose the quantity demanded per week of a certain dress is related to price by the demand equation p=√75-2x. In order to maximize revenue, how many dresses should be made and sold each week?

89. ## account

1. Business started with Cash Rs. 100,000/-, Bank Balance Rs. 150,000/-, Merchandise goods Rs 40,000/-, furniture Rs. 5,000/- & Office equipment Rs. 30,000/- 2. Goods Purchase from ABC Co of Rs. 40,000/- on cash less 15% discount

90. ## 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.

96. ## chemistry

An ideal gas in a sealed container has an initial volume of 2.45 L. At constant pressure, it is cooled to 23.00 °C where its final volume is 1.75 L. What was the initial temperature?

97. ## 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?

98. ## 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?

118. ## 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

119. ## 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?

120. ## Justice system

1. Murder implies malice, whereas __________ does not. A. manslaughter B. willful homicide C. forcible rape D. aggravated assault is it A 2. __________ involves sexual intercourse with a corpse. A. Pederasty B. Bestiality C. Necrophilia D. Buggery is it C

121. ## chemistry

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

122. ## 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

131. ## 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

132. ## 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

133. ## Music

2. What is the 2nd scale degree of D flat major? is it G flat? 8. The interval between F and A is the same as a. D and B b. A and B c. F and G d. C and E 9. A minor second on the white keys is between a. A and B b. G and A c. D and E d. E and F 10. A half

134. ## 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

135. ## 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

136. ## History

In World War 2 why did the dictors think they could take over Europe and other places??

137. ## Math

The total age of 4 brothers and sisters is 38. Barry is two years older than Carrie. Larry is one year older than Barry. Gary is five years older than Carrie. How old is each?

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

139. ## physics

A typical science question young people have is "Why can a glass can contain water?" and a typical answer is "Because the distance between molecules that make up the glass is smaller than the size of each water molecule." This isn't quite right though.

140. ## L.O

Identify and describe 3 environmental health hazards that cause ill health,crises,and or disasters within your community or any other community within south africa and globally.inlcude evidence that is current of the identified issues

141. ## 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?

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

143. ## human life

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

144. ## social studies

Why were Palestinians kicked off their land by the Jews?

145. ## Math

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

146. ## 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

147. ## Math

Evaluate each expression if x=4,y=2/3 and z=1/4 22.3/8x 12/8=1 1/2 24.3x=12 26.9y=36 28.yz=2/12=1/6 30.xyz Im not sure

148. ## Ashford

Provide a scientific hypothesis and explain how one might go about testing it, either by confirming the hypothesis or using Karl Popper's strategy of disconfirmation. Discuss which of these two strategies is better and why

149. ## Life orientation

What are 2 institutions that are involved in supporting drug abuse?

150. ## math

find the missing side of the triangle b=2.1 c=29

151. ## math

Are all quadratics of the form y = ax^2+bx +c and y = -ax^2+bx +c functions? Explain your answer.

152. ## Pre calc

Write the equation in standard parabola form? x^2+ 4xy +4y^2 +5root5 y+ 5 = 0 Thanks so much!

153. ## 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

154. ## Trig

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

155. ## Life Science

If a sponge (from the ocean, not a cleaning sponge. :P) were torn apart by a predator, what would happen?

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

157. ## 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.

158. ## parabolas

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

159. ## 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

160. ## immunology

do monocytes derive from killer T cells?

161. ## Algebra

What is the sum of all positive integers N

162. ## Life orientation

(A)IN 10-15 lines critical discuss 5 ways in which the human or environmental problem impacts on the community . Provide relavant sources to support your claims.

163. ## life orientation

5 ways of pollution which the human or environmental problem impacts on the community

164. ## Physics

You are watching a marching band practice outdoors. Near you are two trumpet players, one marching directly towards you and one away from you at the same speed. Each trumpet player is playing an A (440 Hz) and you hear a beat between the two sounds at a

165. ## 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

166. ## 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%

167. ## Pre-Algebra

Tempurature of substance increases by 10°C in 5 minutes. Write it as a unit rate. Then convert it to degrees Fahrenheit per hour.

168. ## math

In a set of 400 values, the mean is 121 and the standard deviation is 14. Estimate how many values fall in between each interval? a) 107 - 135 b)93 - 149 c) 79 - 163

169. ## 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

170. ## physics

A motorbike starts from rest at time t=0 and begins to accelerate around a circular track as shown in the figure below. Eventually, at time t=t_1 the motorbike reaches the maximum velocity possible without slipping off the track. What's the minimum length

171. ## Math

A firm manufactures light bulbs and those that come out of the assembly line are either defective or good. Every five bulbs that come out, 1 is defective. If 3 bulbs are selected at random, what is the probability that: (i) All 3 are defective (ii) All 3

172. ## 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

173. ## Calculus

A function is implicitly defined by x^2 - 4y^2 = 9 Find the equation of the tangent to the function at x = 1

174. ## 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
175. ## 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 =

176. ## stats

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

177. ## 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

178. ## life orientation

identify and describe three environmental health hazards that cause ill health,crises,and or disasters within mamelodi

179. ## art

What are the subclaims in Bernini's works of art

182. ## Socials

I had posted some of these questions a few days ago, but i had trouble finding the answers to these questions in the sites. Can you please answer them with giving sites. Thanks :) what are some fun things to do in guadeloupe(ex: biking, water skiing,

183. ## 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

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

185. ## 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.

186. ## is this correct algebra 1

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

187. ## Science

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

244. ## Ngono

What is alcoholism?

245. ## history

write a brief description of the civil war activities in southern california from 1861-1865.

246. ## Algebra 2

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

247. ## Math: Surface Area

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

248. ## Science

Where can liquid manure be obtained from?

249. ## l.o

5 ways in which the human or environmental problem impacts on the community. Proide relevent sources to support the claims.