# Questions Asked onFebruary 14, 2013

1. ## physics

A pulley is suspended by a Cord (C). on one end of the pulley there is a 1.2 kg block and on the other is a 3.2 kg block.Determine the tension in this cord after the masses are released and before one hits the ground. Ignore the mass of the pulley and

2. ## Physics

A 0.03-kg bullet is fired vertically at 200m/s into a 0.15-kg baseball that is initially at rest. The bullet lodges in the baseball and, after the collision, the baseball/bullet rise to a height of 37m. (a). What was the speed of the baseball/bullet right

3. ## chemistry

find the heat energy needed to change 150g of ice at -15c to ice at -63c

4. ## Algebra 2

Your car gets 25 mi/gal around town and 30 mi/gal on the highway. a. If 50% of the miles you drive are on the highway and 50% are around town, what is your overall average miles per gallon? b. If 60% of the miles you drive are on the highway and 40% are

5. ## Math

Sam needs to cut a piece of sheet metal into 8 pieces. All the cuts are made in the same direction. It takes him 5 minutes to make each cut. How many cuts will Sam make? How would making a table help you find the number of minutes it took Sam to cut the

6. ## Physics

Joanne drives her car with a mass of 1000 {\rm kg} at a speed of 23m/s . Find a road friction force that is need to bring her car to a halt in 14s .

80. ## algebra 1

The formula used to convert temperature measurements from degrees Celsius (C) to degrees Fahrenheit (F) is shown below. F = 9/5C + 32 What is the Fahrenheit equivalent of 25 degrees Celsius? Round the answer to the nearest degree.

81. ## Algebra

Write the binomial 1 − 27b3 as the difference of cubes.

82. ## Maths- very very simple

can someone tell me what the title of this proof is? a^2+b^2=c^2 im writing a paper on the Pythagorean theorem and this is the proof I would use to explain it to someone but idk the name of it. PLEASE help me out here.

83. ## physics.........

The waterfall "Angel Falls" in Venezuela is the world's tallest at h=979 m. Assume that the water's velocity on the top of the falls and on the bottom of the falls (after it hits the ground and begins to flow away) is equal, and that no total energy is

84. ## chemistry

h2s + HNO3 -->s+ no+H2O balance by oxidation number change

85. ## trig

a lighthouse is located at point A. a ship travels from point B to point C. At point B,, the distance between the ship and the lighthouse is 7.5km. At point C the distance between the ship and the lighthouse is 8.6km. Angle BAC is 58 degrees. Determine the

86. ## ALG 2 PLZ PLZ HELP

1.)The product of 14 and n is -28. Write the algebraic equation. 2.)Four times a certain number is the same as the number increased by 78 3.)A blue bike is $14 less than a red bike. The sum of their prices is$300. How much is the red bike 4.)Alex is six

87. ## chemistry

Exactly 50.0ml solution of Na2CO3 was titrated with 65.8ml of 3.00M HCl. If the specific gravity of the Na2CO3 solution is 1.25, what percent by weight of Na2CO3 does it contain?

88. ## jones

I have a unscramble analogies worksheet that I can't answer. Here are the analogies: ________:judical branch [eempusr ructo] radius:______[meeairtd] brass instruments:_____[stoaercrh] _______:poem[anzsat] _______:pants[bowaerrd] thank yo

89. ## Chemistry

A solvent has a molar mass of 37.2 g/mol and a normal boiling point of 111.2 oC. The boiling point elevation constant, K b , for this solvent is 1.58 oC/m. If 18.7 g of a nonelectrolyte having a molar mass of 20.5 g/mol are mixed with 170.0 g of the

159. ## english

I would like ur opinion on the book that I should read,,, should I read all good children? Is it worth it?

A 16 wheler truck has 16 tires. The cab of a 16 wheeler has 6 tires. how many tires are on 11 truck cabs?

161. ## Education/Technology

What software features are important in selecting classroom management software, based on the classroom academic software evaluation rubric? A) The list includes grade level, documentation, cost, help features, and ease of installation. B) The list

162. ## Math

A mother of triplets wants to buy gum balls the machine has two colors how much will it cost to get three gum apps the same color ?

163. ## english

1. Explain the expression "Sabbath lull" in paragraph one of the story. 2. Why does Oakhurst feel "they" might be after him? Who protected him from the fate of those other citizens hanging from the Sycamore tree? 3. How do both the Duchess and Uncle Billy

164. ## Math

Why area is measured in square feet? And why is volume measured in cubic feet?

165. ## Law

I am looking for a currect event in a newspaper article that I can relate to criminal law. Any suggestions..

166. ## Education/Technology

Is concept mapping a type of word processing software?

167. ## Mechanics

Find the moment L about a perpendicular axis through the rod at a distance L/3 from the centre of mass.

168. ## Differential Equations

y'=2x+y. Find a solution whose graph is also an isocline.

169. ## Math

I have a question. If a classroom has a party but then 2 more classrooms of 20 each come and do the party with them then how many party things will they need more? Fyi all the classrooms have 20 in them

170. ## Science

a 5-kilowatt source powers a motor that is lifting a 30 kg mass straight up. how far will the mass move in 6 seconds

171. ## statistics

Claim: The majority of adults like pizza. A sample of 400 randomly selected adults shows that 220 of them like pizza. Based on the given sample information, do you think that the above claim is true? Why or why not?

172. ## Math

Convert 720 inches to miles

173. ## college physics 1

The coefficient of static friction between a block of wood of mass 29.2-kg and a rough table is 0.51. The table is slowly tilted until the block of wood starts to slide down the surface. At what angle of the table with respect to the horizontal does the

174. ## Math

Write the word form for 450, 708 Is it four hundred and fifty thousand, seven hundred and eight

175. ## physics

Now note that the following becomes good approximations as θ→0: sinθ≈θ sin2(π4−θ)≈12−c⋅θ (where c is some constant.) Use these approximations to estimate the probability of success of the two measurements as x→0 (as a function of x and

176. ## english

is this sentence correct? There are quite a few reasons for me taking a break during this period.

Identify two companies that you believe integrate corporate social marketing in their overall strategic marketing plan

178. ## Math

The school handyman measured the space needed for a new computer monitor in the science room at 20 3/4 inches. Which of these measures is not more precise? A. 20 1/2 inches B. 20 7/8 inches C. 20 15/16 inches D. 20 21/32 inches

179. ## math

solve the system by the elimination method: 3x-2y=2 2x+4y=-5

180. ## Math

The school handy man measured the space needed for a new computer monitor in the science room at 20 3/4 inches. Which of these measures is NOT more precise? A. 20 1/2 inches B. 20 7/8 inches C. 20 15/16 inches D. 20 21/32 inches

181. ## math

Simplify using Pascal's Triangle: state a term number of formula and a value. What term number (Tn,r)is your answer? find the sum of row 12? I know that the sum is 2^12=4096, how would you find the term number?

182. ## Physics

You drop an object from atop a building and it takes 7.20-sec before it hits the ground. Assume that there is no air resistance, how tall is this building?

write greater than, lesser than, or equal: 25 cents --------------- 3/10 of a dollar.

184. ## Phy113

At what temperature will the root-mean-square speed of oxygen molecules have the value of 640 m/s? 1 kilom has a mass of 32kg.

185. ## math

if the ratio of boys to girls is 3/4 and there are 49 students how many boys are there?

186. ## Science

Is it bad to use the computer if you have the flu? My head hurts because of the flu but will it be worse if I use the computer?

187. ## algebra 1

A ball is tossed upward with an initial velocity of 14.2 meters per second. The equation below shows the velocity (v) of the ball after t seconds. v = –9.8t + 14.2 After how many seconds is the velocity 0 meters per second? Round the answer to the

188. ## Biology

what molecule is released before acetyl coa enters the krebs cycle Doing cross word puzzle 13 spaces cant figure it out?

189. ## maths

If a, b and c are sides of a triangle Then prove that 1≤ [(a^2+b^2+c^2)/(ab + bc+ca)]

190. ## Mechanics

An aeroplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.How large a torque is required to give it angular acceleration of 20rad/sec^2

191. ## Mechanics

An areoplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.how large a torque is required to give it angular acceleration of 20rad/sec^2

192. ## Chemistry

How much acid is needed to neutralize a 5L solution with a pH of 12.5. The acid available is 1 N HCL.

193. ## health

In 2004, which ethnic or racial group was at a lower risk of suicide for people ages 65 or older? A. Hispanics B. Asian and Pacific Islanders C. Non-Hispanic Blacks D. Non-Hispanic Whites c

194. ## eco

Please explain, I am having a hard time with this. What will ocurr to average and marginal productivity once a technological innovation is presented to the production process?

195. ## math

the input is 1 output is 2 input is 2 output is 5 input is 3 output is 10 input is 4 output is 17 input is 5 output is 26 what is the rule

196. ## math

solve the system by the elimination method: 4x=5y+24 5x=4y+21

214. ## CHEMISTRY

Ni(NO3)2.H2O+2KSCN WHAT IS THE PRODUCT?? WHAT COMPLEX IS FORMED ?

216. ## chemistry

why cant Na be used to prepare H2?

217. ## maths-urgently needed

There is a garden of apples and the profit from a garden of apple trees is given by f( x ) = 70 + 30 x^2 - (1/3) x^3, where x = number of apples trees per acre. How many trees per acre will maximize the profit?

218. ## Math

Referring to the experiment of rolling two fair dice, let A be the event that the total is less than eight and let B be the event that the total is even. Draw a Venn diagram corresponding to this experiment and events A & B (using probabilities). 1

219. ## Maths, find the Exact Value

have to find the exact value(so in fraction form.. like 1231231/41231 or something) of 2/3 + 3/4 - 2/11 - 5/21 I'm unsure of the working

220. ## Applied Calculus

Find the derivative of the function. g(t) = ((8t + 10)^2)*(((10t^2) - 7)^-3) I am supposed to use The Chain Rule. However, I am confused as to how to do this.

221. ## English

Anyone know any quotes with adverbs in them?

222. ## math

what is 5% of \$11,000.00 quarterly

223. ## Mechanics

An aeroplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.How large a torque is required to give it angular acceleration of 20rad/sec^2

224. ## maths

Given equation F=9/5c+20 find f-intercept

225. ## Education

Is concept mapping a type of word processing software that helps with students with special needs?

226. ## eco

Please explain, I am having a hard time with this. What will ocurr to average and marginal productivity once a technological innovation is presented to the production process?

227. ## math

multiplying mixed numbers 4 3/5 x 2/3= 23/5 x 2/3= 46/15? I am not sure it this is right I know that I can't simplify it, so I am thinking that it is 46/15

228. ## Hattie's Birthday Box

In Hattie's box, the granddaughter smells "a yuong farmer's stubborness, a pioneer mother's sorrow, and a wondrous wild and lasting hope." Name one event in Hattie's life that goes with each one.

229. ## english

can divining be replaced by doubting or realizing

230. ## Math

the base of a triangle is the same as the height. what least whole number measurement for the triangle so that the area would be greater than144^2

231. ## Math

I have to find the exact value(so in fraction form.. like 1231231/41231 or something) of a^4b^2/c^2 , a = (2/5)^2, b = (8/5)^5 c= (4/5)^10 I'm honestly not sure how to get around to doing it with working

232. ## Math

Referring to the experiment of rolling two fair dice, let A be the event that the total is less than eight and let B be the event that the total is even. Draw a Venn diagram corresponding to this experiment and events A & B (using probabilities). 1

233. ## Mechanics

An aeroplane propeller has a 100kg and radius of gyration of 0.6cm.find its moment of inertia.How large a torque is required to give it angular acceleration of 20rad/sec^2

234. ## eco

Please explain, I am having a hard time with this. What will ocurr to average and marginal productivity once a technological innovation is presented to the production process?

3/8 + 3/4 =

236. ## math

solve x (proportion) 2r:3t= x:6a