# Questions Asked onApril 14, 2013

1. ## chemistry

A voltaic cell that uses the reaction Tl3+(aq) + 2 Cr2+(s) ¨ Tl+(aq) + 2 Cr3+(aq) has a measured standard cell potential of +1.19 V. determine E‹red for the reduction of Tl3+(aq) to Tl+(aq).

2. ## chemistry

Write the equations describing the electrode reactions and the net cell reaction for this electrochemical cell containing indium and cadmium: This is what I have so far: anode: In(s) --> In^3+ + 3e- cathode: Cd^2+ + 2e- --> Cd (s) Need help writing the

33. ## chemistry

The escape velocity from earth is 2.5 x10^4 miles per hour. What is this speed in m/s? (1 mile 1609 m)

34. ## Biology

PLEASE HELP!!!! 1. How many millions of years ago did sharks first appear? (Make sure you are looking for animals that only have cartilage skeletons). 2. How many millions of years ago did bony fish (like the perch) first appear? 3. How many millions of

35. ## algebra

the elspaso middle school girls basketball team is going from el paso to san antonio for the texa state championship. The trip will be 560 miles. Their bus travels at an average speed 60 miles per hour.

36. ## chem

If it takes 84.2 min for the concentration of a reactant to drop to 20.0% of its initial value in a first-order reaction, what is the rate constant for the reaction in the units min-1?

54. ## English

1. Jenny's family are/is following her. She is taking a walk with her family. 2. Yujin is watering plants with a watering can. Her brother is digging with a trowel. Her father is also watering plants with a watering pot. What is Yujin doing? She is

55. ## Maths

Solve for the value of x: 6log(x^2+1)-x=0

56. ## U.S/history AP

he War of 1812- also called the second war of American Independence or by its opponents the derisive (----) . U.S.declared war on Britain because they did not recognize our neutrality and interfered with our freedom of the(-----)shipping My answers are:

57. ## Chemistry

If the Kb of a weak base is 1.5 × 10^-6, what is the pH of a 0.25 M solution of this base? I found that I need to use the quadratic equation but I'm having difficulties because I come up with taking the square root by zero and that isn't right. Please

58. ## Life orientation

What are the 5 factors contributing to the lack of physical fitness and proper nutrition in the adolescents

59. ## precalc

1. A plane is headed at 122 degrees with an air speed of 350mph in a wind that is blowing from 38 degrees. Find the ground speed of the plane and the speed of the wind if the actual flight was at 133 degrees. 2. A plane is heading at 20 degrees at 300mph

60. ## Physics

Consider the RL circuit shown in the figure, where R = 5.0 Ω and L = 4.6 H. How much energy is stored in the inductor after the switch has been closed a long time? I would know how to do this if they actually gave me a value for time, but I'm lost now.

61. ## Chemistry

* Fixed Question What is the PH of a buffer made by adding 8.20 grams of sodium acetate(NaCH3CO2) to 500 ml of 0.10 M(molarity) acetic acid(CH3CO2H). Ka for acetic acid is 1.8 x 10^-5.

62. ## Principal of Math

a tree casts a shadow 29m long. at the same time the shadow cast b a 61cm tall statue is 82cm long. find the height of the tree. round results to the nearest unit.

63. ## maths

a dam holds 13.5 megalitres of wate when full. If water flows from the dam at the rate of 5 litres per second, approximately how long will it take to empty the dam.

64. ## math

Marty walks to school 4 days each week. The walk talks 15 minutes. How much time does it take marty to walk to school & home each week. Is this correct? 15×4=60 it takes him an hour each week

65. ## math

Given: f(closure(A)) subset of closure(f(A)) Prove: For any closed set A in Y, f^-1(A) is closed in X (AKA f is continuous) X and Y are metric spaces f: X -> Y f^-1 is f inverse. closure(A) = A U limit points of A The first line is Let C be a closed subset

66. ## calculus

8). Part 1 of 2: In the solid the base is a circle x^2+y^2=16 and the cross-section perpendicular to the y-axis is a square. Set up a definite integral expressing the volume of the solid. Answer choices: integral from -4 to 4 of 4(16-y^2)dy, integral from

67. ## Alg 1

The rectangular has an area of 5400 cm^2. What is the value of w? 5400 = (w)(2w - 30) 5400 = 2w^2 - 30 w 5400 = 2w(w - 15) Now I am stuck. My choices are: -45 cm 45 cm 60 cm 90 cm What do I need to do next to get the correct answer? Thanks.

68. ## pre calc

Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A= ??.

69. ## math

Suppose you had a slice of pizza that was cut from a 16” pizza. You measure the angle that it was cut at to be 0.6 radians. EXPLAIN how you could find the length of the crust on the slice of pizza. *

70. ## Chemistry

What is the PH of a buffer made by adding 8.20 grams of sodium acetate(NaCH3CO2) to 500 ml of 0.10 M acetic acid(CH3CO2H). Ka for acetic acid is 1.8 x 10^-5.

71. ## science

you run 100m in 25's. if you later run the same distance in less time , does your average speed increase or decrease? explain.

72. ## precalculus

For each of the following determine whether or not it is an identity and prove your result. a. cos(x)sec(x)-sin^2(x)=cos^2(x) b. tan(x+(pi/4))= (tan(x)+1)/(1-tan(x)) c. (cos(x+y))/(cos(x-y))= (1-tan(x)tan(y))/(1+tan(x)tan(y)) d.

73. ## anthropology

Chiefdoms are characterized by all of the following except

74. ## Physics

A 100 W lamp is connected to 120 V, and its current is measured. A resistor is added to the lamp to reduce the current to half its original value. (a) What is the potential difference across the lamp? (b) How much resistance was added to the circuit? (c)

75. ## Biology

Reptiles and mammals both have a four chambered heart yet reptiles utilize the sun to monitor body temperature while mammals control body temperature internally. What does this mean about the separation of oxygenated (blood that already picked up oxygen

76. ## BIO

3. Fish have a two chambered heart called a single loop. discuss the benefits and drawbacks of this system. 4. Amphibians have a three chambered heart. Discuss the importance of the extra chamber in terms of the obvious physical differences that amphibians

asked by SOMEONE HELP THIS PERSON
77. ## Math

Null factor law and factoriising: 2x^2+7x=0 X(2x+7)=0 X=0 or 2x+7=0. ( the answer in the book was x=-7/2, how? And. X^2-4=2x-4 Is it x^2-4-2x+4=o ??? If so!' how do I continue?

78. ## science

Why is it difficult to distinguish between some pure substances and solutions? What methods can overcome this to define if either it is a pure substance or solution?

145. ## math

Bill sees that the shadow of a flag pole is about four times as long as his shadow. If Bill if about 5 1/2 feet tall, about how tall is the flag pole?

146. ## Math

If (Y x 15+20=245), what does Y equal?

y/9=-5/3

148. ## government

The "long tail" is a phenomenon related to

149. ## MATH

Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

150. ## arithmetic

which of the following is the least

151. ## Precalculus

Solve the equation 2sin^2(theta)+3sin(theta)+1=0 for theta.

152. ## calculus

5). Find the volume of the solid of revolution generated by rotating the graph of y=8 lnx about the y-axis between y=0 and y=16 Answer choices: 238.39pi, 246.39pi, 230.39pi, 214.39pi, 222.39pi 7). Find the area of the region bounded by y=√x-2, y=9, y=0,

153. ## calculus

3). The shaded region is bounded by the y-axis and the graphs of y=1+√x, y=2. Find the volume of the solid obtained by rotating this region around the x-axis. Answer choices: 7/6pi, 4/3pi, 11/6pi, 5/3pi, 13/6pi, 5/6pi 4). Find the area of the region

154. ## algebra

In the early months of some year, one site added 0.6 million new accounts every day. at this rate, how many days would be needed to add 30 million new accounts?

155. ## English

1. He is riding a roller board. 2. He is in the air on the roller board with his arms spread in the picture. 3. Talk with your partner and check the Yes box if your partner likies the activity. If your partner doesn't like the activity, check the no box.

156. ## math

Can a right triangle have sides of length 1, 7, and 5 to the square root of 2? Justify your answer.

157. ## english

dialect is used to a-stablish setting and character b-describe the atmosphere c-support the main idea d-help readers visualizwe events mi 1st answer is d then a

158. ## Math

Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)/(sec^2 x))-1 = (f(x))^2 f(x)= ??

159. ## Math

What is 5 to the square root of 2?

160. ## math

Let 2^a = 5 and 2^b = 7. Using exponent rules, solve the equation in terms of a and b. 0.4^x = 343

161. ## english

if a free verse peom has alliteration does that mean it has rhyme

162. ## Social studies

Trace the historical origin of social studies in Russia,USA and Brittin

163. ## english

Her gaze was a laser to his heart this metaphor means that a-grandmother was trying to scare him b-grandmothers stare made him feel guilty c-grandmothers look gave him a heartburn d-grandmother stared directly at his chest 1-c or d

164. ## Chemistry

What volume of H2(g), stored at 26°C at a pressure of 141 atm, would be needed to run an electric motor drawing a current of 8.4 A for 4.8 h?

165. ## Biology

Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?

166. ## Biology

Dinosaurs were reptiles that grew to enormous sizes. What may an evolutionist hypothesize about the oxygen content of the environment during the age of dinosaurs?

167. ## english

irony a-grandma doesnt believe her grandsons story b-schoo lpricipal sees a student break into a locker c-person who reclaims an item from a thief is accused of stealing d-person who loses something doesnt want it back 1-d then c

168. ## Biology

Amphibians have a three chambered heart. Discuss the importance of the extra chamber in terms of the obvious physical differences that amphibians like frogs have from fish.

169. ## english

cavernous means a-small b-huge c-elegant d-confined 1-b

170. ## english

Her gaze was a laser to his heart this metaphor means that a-grandmother was trying to scare him b-grandmothers stare made him feel guilty c-grandmothers look gave him a heartburn d-grandmother stared directly at his chest 1-b

171. ## psychology

Perceptions are linked to sensations. what happens when we get overloaded from our senses and how would that overload impact perceptions?

172. ## L O

Recommendations on how to address HIV/AIDS

173. ## math

given the points A(0,0), B(3,1) and C (1,4) what is the measure of angle ABC I plotted it on a gragh and got 1.46 degress. I am unsure if I am doing this question correctly. Or am I misreading it thanks in advance .

174. ## physics

'a weather station monitors a storm using a radar system. the radio wave pulse emitted is received back at the transmitter after 0.34 ms. the wavelength emitted was 5.6 cm and that received after reflection from the storm was 1 billionth of a meter longer.

Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)(sec^2 x))-1 = (f(x))^2 f(x)= ???

176. ## social studies

NEED HELP ON THIS QUESTION Discuss the relation of democracy to globalization. What, in your view, does the future hold in this regard?

177. ## chemistry

how do I carry out qualitative analysis on (NH4)2SO4.FESO4.6H20

178. ## social studies

NEED HELP ON THIS QUESTION Globalization can be understood in terms of shifts in a series of domains. Discuss in relation to i) culture and ii) the state. What in your view, does the future hold in this regard?

179. ## pharmacy math

which would be the most appropriate measuring device for the following prescription: Give 0.7ml of metoclopramide syrup every six hours answer 1 tsp oral syringe with 1 ml marking I am not sure answer Bob help

180. ## math

form the quadratic equations whose roots are(A:5 and -1/3

181. ## English

Posted by rfvv on Sunday, April 14, 2013 at 3:50pm. 1. He is riding a roller board. 2. He is in the air on the roller board with his arms spread in the picture. 3. Talk with your partner and check the Yes box if your partner likies the activity. If your

182. ## Math 112 Help please

How do I break these down to find out which one is the largest without using a calculator their fraction. a. 13,579 + 1/2468 b. 13,579 - 1/2468 c. 13,579 * 1/2468 d. 13,579/ 2468

183. ## calculus

Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4

184. ## Life orientation

Which institution or organisation involved in supporting or giving redress to substance abuse?

185. ## Parametric Equations

Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4

186. ## accounting

Hillsborough Co. has an available-for-sale investment in the bonds of Schuyler with a carrying (and fair) value of $85,540. Hillsborough determined that due to poor economic prospects for Schuyler, the bonds have decreased in value to$ 59,710. It is

187. ## Math

28a^11b^7/4a^3b

188. ## MATH

1 D = 10^-18 statC·cm = 10^-10 esu·Å = 1⁄299,792,458×10^−21 C·m ≈ 3.33564×10^−30 C·m ≈ 1.10048498×1023 ≈ 0.393430307 au A dipole of 1 Debye is equal to 3.33 x 10-30 C m . Show that in atomic units 1 D = 0.39345 au. The above is the

189. ## arithmetic

which of the following is the leas0. 0.015 0.105 or 0.15

190. ## Chemistry

If the pressure is 10.0 atm, what is the temperature? If a 2.53-L container is filled with 169 g argon

191. ## maths

Hannah has a balls.4/5 is a black balls while the remaining 35 is a red balls.how many more black balls does hannah have...thanks!

192. ## Chemistry

The question I am having trouble with is: Scientists originally were uncertain whether the oxygen gas produced during photosynthesis came from CO2, H2O, or from both. How could radioisotope tracers be used to settle that question?

193. ## Alg 1

A box shaped like a rectangular prism has a height of 17 in. and a volume of 2720 in^3. The length is 4 inches greater than twice the width. What is the width of the box? Please solve and explain what I need to do. The choices are: -10 8 20 40

194. ## Math

Graph y = ½ x^2 – x +3 for 0≤x≤6 Calculate the mid- ordinates for 5 strips between x = 1 and x 6, and hence use the mid-ordinate rule to approximate the area under the curve between x = 1, x = 6 and the x- axis. assuming that the area determined by

195. ## English

1.If she were or was Please explain the rules. 2. When do you use can not and cannot or everyone and every one? Rules?

196. ## tax accounting

purchased a bond on August 15, 2012 for $2,100.$200 of the purchase price represented accrued interest. She received $210 in interest income on the bond on December 1, 2012. What is the proper treatment of the$210 interest income for federal income tax

197. ## english plzzzzzzzzz helppppp

1The people i love the best 2jump into work head first 3without dallying in the shadows 4and swim off with sure strokes aost out of sight 5They seem to become natives of that element 6the black sleek heads of seals bouncing like half-submerged balls 7 i

198. ## commerce

identify and describe three environmental health hazards that cause illhealth,crises and disasters

199. ## philosphy

I am to draft a six to eight page paper based upon a life changing decision that I or someone in my community had to make. I am considering writing about returning back to school but I am stuck on how to get started. Can someone please help.

200. ## precalculus

Solve the equation cos(2x)cos(x)+sin(2x)+sin(x)=1 for all values of x.

201. ## physics

A 22.0 Ω, 11.0 Ω, and 6.00 Ω resistor are connected in parallel to an emf source. A current of 6.00 A is in the 11.0 Ω resistor.What is the potential diﬀerence across the source? Answer in units of V

202. ## math

three of four numbers have a sum of 22. if the average of the four number is 8, what is the four number

203. ## Quantum/inorganic chemistry

c. Which of these electron configurations has the 4F term symbol for its ground state? p3 d3 d4 f2 f3

204. ## Life orientation

In 10-15 lines critically discuss 5 ways in which the human or enviromental problem impacts on the community

205. ## precalculus

Find all solutions for the equation 3cos(x)=cot(x). When do I use +2kpi? Is it only when I'm suppose to "find all solutions"? I got sin(x)=1/3. Is that correct?

206. ## college math

5u+2v=-15 3u+v=-8 Im not sure how to do this problem

A spring is extended by 4mm when a load of 2.N was applied. a)What is its spring constant? b)How much would it extend if a losd of 150g was suspended from it?

208. ## english

free verse poem a-has simple rhyme pattern b-is written in dignified launguage c-is usually a long narrative peom d-doesnt have a regular rhyme scheme 1-d

209. ## arithmatic

forty six . two multiply by ten minus square

210. ## arithmatic

forty six point two multiply by ten minus square

211. ## Math

cos22.5=1/2 sqrt(A + sqrt B)

212. ## french

caroline apprend a nager elle prend des lecons de

213. ## english

should religious phares be taken out of money for a reasearch paper

214. ## maths

whats a number to the power

215. ## statstics

construct a 90 confidence interval for the population mean ÃŽ¼. assume the population has a normal distribution. A sample if 15 randomly selected math majors has a grade point average of 2.86 with a standard deviation od 0.78. Round to the nearest

216. ## arithmatic

three of four numbers have a sum of 22. if the average of the four number is 8, what is the four number

217. ## Maths calculus

Evaluate f'(1) if f(x) =(7x+1)^2

218. ## Life orientation

Ways in which the lack of physical fitness and proper nutrition impacts ön teens

219. ## english plzzzzzzzzz helppppp

which word comes from a latic word meaning right or law a-lecture b-justice c-level djacket 1-b

220. ## Physics

150kg cart is traveling right 3m/s. a 20kg block of coal comes from the cart at 38degrees below the horizontal. The new velocity of the cart with the block is 3.95m/s. What is the initial speed of the coal.

221. ## algebra

i WAS TRYING TO FIGURE OUT HOW TO GET THE LENGTH OF A SIDE OF A CUBE WHEN THE VOLUME IS 800CM^3

222. ## anatomy

This structure increases the surface area of the interior wall of the small intestine

223. ## chemistry

hey guys please help me answer these questions. 1. can a strong acid be diluted. explain in detail 2. can a weak acid be diluted. explain in detail 3. how does your observation of sunlight change when you place two different concentrations of food colored

224. ## math

Find all solutions of the equation tan^5 x - 9tan x =0. The answer is Ak\pi where k is any integer, the constant A=???

225. ## algebra

(3x-2y)square=?

226. ## Conversion Math

A dipole of 1 Debye is equal to 3.33 x 10^-30 C m . Show that in atomic units 1 D = 0.39345 au.

227. ## Chemistry

how to find the mass of the substance if the only given is the molar mass???

228. ## Find the distance

Find the distance d(P1,P2) between the points P1 and P2 P1=(-1,5);P2=(2,4) d(P1,P2)=

230. ## math

Simplify and write the trigonometric expression in terms of sine and cosine: sin x + (cot x)(cos x) = (1/f(x)) f(x)= ?

231. ## pre calc

C0rr missi0n kill name id real name die

232. ## pre+calc

C0rr+missi0n+kill+name+id++real+name+die

233. ## cosine and sine HELP!

Simplify and write the trigonometric expression in terms of sine and cosine: ((2+tan^2 x)(sec^2 x))-1 = (f(x))^2 f(x)= ???

234. ## english plzzzzzzzzz helppppp

1-Our small community hasn't never had so many choices of bicycle shops. a-Our small community has hardly never had so many choices of bicycle shops. b-Our small community has never had so many choices of bicycle shops. c-Our small community hasn't hardly

235. ## Elementary algebra multiple choice

2x^2+3xy-4y^2= (A) 9x^2-4y^2 (B)9x^2+4y^2 (C)9x^2+4y^2-6xy (D)9x^2+4y^2-12xy

236. ## physics

Hm0 dug b00b pass taik pay 0ff.blue medcare x x1234567.sead h0sp

237. ## physics

Hm0 dug b00b pass taik pay 0ff.blue medcare x x1234567.sead h0sp.c0rr c0urt p0lice 0rder uint die c0de c0rr bylay

238. ## Parametric Equations

Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4

239. ## Biology

Dephosphorylation in the transuction process needs: A) protein kinases B) protein phosphatases C) single sugar like glucose D)cabohydrate

240. ## calculus

Find the length of the curve over the given interval: x=t+1 y=ln cos(t) for t=0 ---> t=pi/4

241. ## science

how does thee sun affect large scale convection in the atmosphere?