# Questions Asked onMarch 4, 2010

1. ## math

is there a formula for an INFINITE ARITHMETIC series/sequence? i know its not s = a / 1-r.. that's for geometric.

2. ## physics

Water flows over Victoria Falls, which is 128 m high, at a rate of 1.4 x 106 kg/s. If half the potential energy of this water were converted into electric energy, how much electric power would be produced by these falls?

3. ## Organic chem.

I need to find examples of reagents used in performing chemical resolutions of acidic, basic, and neutral racemic compounds. I have searched all over the internet and cannot find anything... please help.

4. ## cultural diversity

this is a group with distinct national origins or cultural patterns

5. ## chemistry

calculate the volume of 0.1M NaOH which must be added to 50 mL of 0.1M HCl to give a final solution of pH 6???

6. ## physics

You are designing a game for small children and want to see if the ball’s maximum speed is sufficient to require the use of goggles. In your game, a 15.0-g ball is to be shot from a spring gun whose spring has a force constant of 600 N/m. The spring will

7. ## chemistry

how many calories are needed to vaporize 60g of ethly alcohol liquid at its boiling point of 78.4 degress celcius

8. ## physics

A T-bar tow is planned in a new ski area. At any one time, it will be required, to pull a maximum of 80 skiers up a 600-m slope inclined at 15 degrees above the horizontal at a speed of 2.5 m/s. The coefficient of kinetic friction between the skiers skis

124. ## physics

how far will 350 J raise a 7 kg mass?

125. ## math

L,M,N,O and l,m,n,o are they equal, equivalent or neither? I can not figure this out please help.

126. ## calculus

Given f(x)=x^2-4 and g(x)=1-x and k(g(x))=f(x) find k(x) and then k'(x).

127. ## Sociology

What are the two social order views (contrasting) in the movie THE ISLAND (cloning)? Can someone explain to me what social order is

128. ## Chemistry

The esterification of acetic acid and ethanol is given by the reaction below: C2H5OH(aq) + CH3COOH(aq)===>CH3COOC2H5(aq) + H2O(l) When 1.00 mol of ethanol was mixed with 2.00 mol of acid in a 1.00 L flask, 0.86 mol of ester was formed at room temperature.

129. ## Math

Take an odd digit and use it exactly three times, so that the three digits are equal in value to an even number. ADDITION, SUBTRACTION, MULTIPLICATION AND DIVISION CANNOT BE USED! Can you please help me!

130. ## physics

which is more work pushing with 115N over 15 m or lifting 20N 10meters

131. ## Math

96 * .5 + 30 =

132. ## A.P. CHEMISTRY

How many grams of methanol are needed to raise the boiling point of 250 mL of water by 2.7C. The boiling point elevation constant for water = 0.512 C/m. Assume water to have a density of 1g/mL)

133. ## Math

How many liters is in 4,200 millilieters

each new backpack at delias bookstore comeswith one free gift.the ber graph below shows the number of differt types of freegifts that wrw placed in 50 different backpacks. NEW BACKPACKS WATER BOTTLE-15 KEY RING -20 DAILY PLANNER - 10 NOTEBOOK - 5 if the

135. ## math

what does perpendicular mean????????????

136. ## math

Choose the one alternative that best completes the statement or answers the question. Use inductive reasoning to predict the next number in the sequence. 1) 7, 13, 19, 25, 31, . . . 1) _______ A) 43 B) 38 C) 37 D) 36 Indicate whether the sequence is

137. ## Math

Hannah and Tyler count the number of times the word what occurs. Hannah's data has mean of 2.7 times. What could Tyler's mean be if his results are similar?

139. ## french

what does plus ou moins mean in french

140. ## Math

At the 2010 Winter Olympics, in Vancouver, BC, Usain Bolt won the 100 meters, finishing in 9.69 seconds (a world record.) What was his speed in miles per hour, rounded to the nearest tenth? (1 meter is approximately 39.37 inches.) State the answer in

141. ## Math

Find each quotient. A. 7/3 ÷3 1/2 B. 5/6 ÷ -18

142. ## Math

A large fish bowl holds 4,200 milliliters. Which measure is equivalent? A.4L 200mL B.40L 20mL C.400L 2mL D.40,000l .2ml

143. ## physics

if a particle has work of 8J and doubles its speed. how much work it has done? Can we still determine work in this problem without mass

144. ## Physics

An empty rubber balloon has a mass of 0.012kg. the balloon is filled with helium at 0 degrees celcius, 1 atm pressure, and a density of 0.179 kg/m3. the filled balloon has a radius of 0.5 m. a)what is the magnitude of the buoyant force acting on the

145. ## Biology

20. One difference between a gastrovascular cavity and a one-way digestive system is the presence or absence of a. cell specialization b. digestive enzymes c. digestion within body cells d. a moist membrane for nutrient diffusion A? 21. In an open

147. ## Macroeconomics

An economy is facing the recessionary gap shown in the accompanying diagram. To eliminate the gap, should the central bank use expansionary or contractionary monetary policy? How will the interest rate, investment spending, consumer spending, real GDP, and

148. ## MATH214

If is a line whose equation is y = 2x - 1, find the equation of the image of under each of the following translations: a. (x, y) → (x, y - 2) b. (x, y) → (x +3, y) c. (x, y) → (x - 3, y + 2)

195. ## Chemistry

Br2 + 5F2 --> 2BrF5 How many molecules Br2 react with 1.11 x 10^20 molecules F2? I got 2.21 x 10^47 but I feel that's too big and is most likely wrong. Can someone help me?

196. ## Chemistry

I am having a bit of difficulty getting the net equation and the net ionic equation and the net ionic equation. I think I have the balance equation right. Thanks in advance for any help. For the acid base neutralization reaction of carbonic acid,

197. ## HCA/210

The assignment says to describe 2 approaches to measure patient outcome. I have read the chapter several times and I am still confused. Has anyone taken this class? If so do you know of a website that I could maybe research for more information? Thanks!

12-11a=45

199. ## physics

you ca obtain four 20 ohms resistors from te stock room. ow can you aciee a resistance of 50 ohms uder these circumstances

200. ## honors algebra 1

if f(x)=2x and g(f(x))=x, find g(x)

201. ## chemistry

The kinetic energy of a rolling billiard ball is given by {\rm{KE}} = 1/2\,mv^2 . Suppose a 0.17-{\rm kg} billiard ball is rolling down a pool table with an initial speed of 4.5 m/s. As it travels, it loses some of its energy as heat. The ball slows down

202. ## Baselines

Which are better longer baselines or shorter baslines for measuring stuff. Can someone please give me an explanation about them, thanks

203. ## spelling

wouldn't:couldn't::greeen:

204. ## Physics

A particle of mass m is shot with an initial velocity vector v i and makes an angle θ with the horizontal, as shown below. The particle moves in the gravitational field of the Earth. (makes a shape of a parabola)Find the angular momentum of the particle

205. ## spelling

fifteen:five::nine:?

206. ## math

a rectangle has a length of 3 yds, 8 in. and a width 2 ft., 3 in. multiply the lenth and width to find the area of the rectangle

207. ## chemistry

What is the formula used to solve the problem: How many milliliters of 1.171 M HCl are required to react with 7.69 grams of CaCO3 ?

208. ## human services

How does the unique realtionship between human service oragnizations and the populations they serve impact ethical decisions? what are some dilemmas that occur in human service organizations? which do you thind has the greatest power to solve or prevent

209. ## Chemistry

An alpha particle (mass 6.6 x 10^-24 grams) emitted by radium travels at 3.4 x 10^7 plus or minus 0.1 x 10^7 mi/h. (a) What is its de Broglie wavelength (in meters)? (b) Whats uncertainty in its position? for part a I got -3.41 x 10^6 meters which said it

210. ## Chemistry

In 1909, Robert Millikan performed an experiment involving tiny, charged drops of oil. The drops were charged because they had picked up extra electrons. Millikan was able to measure the charge on each drop in coulombs. Here is an example of what his data

211. ## ALEGEBRA

The new school has exactly 1000 students and 1000 lockers.On the first day all the students meet outside and agree on the following plan: the first student will enter the school and open all the lockers.The second student will then enter the school and

212. ## history

How did human history in North America during the period described in the Prologue differ from the events of Asia, Eurasia, and Europe? Be specific prologue in text book the american nation a history of the united states

213. ## human services

Which do you think ahs the greatest power to solve or prevent the delimmnas?

214. ## human resource

Is there anyone familiar with course 230/Ethical Issues in Human Services???

215. ## Chemistry

How much energy will be released when 11.11g of calcium chloride dissolves in 100 mL of water. deltaHf of Ca 2+ (aq)=-543Kj/mol, deltaHf of Cl 1-(aq) = -167Kj/mol CaCl2(s) ==> Ca 2+(aq) + 2Cl 1-(aq)

216. ## Chemistry

In chemistry, for a given substance what information links mass to moles? number of particles to moles?

217. ## physics

can someone take me through this vector combination question please an airplane is observed to be flying at a speed of 600km/h. The planes nose points west. The winds velcoity is 40km/h 45degrees west of south. Find the air planes velocity relative to the

218. ## Geometry

Over July 16, 1882, a massive thunderstorm over Dubuque, Iowa, produced huge hailstones. The diameter of some of the hailstones was 17 inches. Ice weighs about 0.033 lb/in^3. What was the approximate weight of these hailstones to the nearest pound? The

219. ## Math

Determine the equation of the graph in the form y = acos(bx). I will try and describe the Graph. -It starts at the origin (0,0) -It has a minimum value of -2 -It has a maximum value of 2. -It has an x-intercept of 90 degrees. -It starts moving downward

220. ## art

Can some one help me with this art question. Not sure what exactly it is asking for. 1) Look at Las Meninas by Diego Velázquez and describe the formal qualities of this work in terms of its organizing space. Do the formal qualities working together create

221. ## Chemistry

What counts as a conversion factor ?

222. ## Physics.

The figure below shows an arrangement of 15 identical disks that have been glued together in a rod-like shape of length L = 1.4500 m and (total) mass M = 135.000 g. The arrangement can rotate about a perpendicular axis through its central disk at point O.