# Questions Asked onNovember 26, 2012

1. ## The Binding Energy of Electrons?

An X-ray photon of wavelength 0.954 nm strikes a surface. The emitted electron has a kinetic energy of 935 eV. What is the binding energy of the electron in kJ/mol? [KE =1/2 mv^2; 1 electron volt (eV) = 1.602 x 10^- 19 J]

2. ## trigonometry

The wheels of a car have radius 11 in. and are rotating at 800 rpm. Find the speed of the car in mi/h. mi/h

How can you use 4x7 to find 8x7? find the product. I don't understand this how can i expect my 3rd grader to understand.

4. ## stats math

Suppose that two cards are randomly selected from a standard 52-card deck. What is the probability that the first card is a spade and the second card is a space if the sampling is done without replacement?

5. ## chemistry

The molar enthalpy of vaporization for water is 40.79 kJ/mol. Express this enthalpy of vaporization in joules per gram. b. The molar enthalpy of fusion for water is 6.009 kJ/mol. Express this enthalpy of fusion in joules per gram.

6. ## PHYSICS

The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of 807 m. If water at the top of the falls is at 16.7°C, what is the maximum temperature of the water at the bottom of the falls?

7. ## trigonometry

A truck with 48-in.-diameter wheels is traveling at 45 mi/h. (a) Find the angular speed of the wheels in rad/min. rad/min (b) How many revolutions per minute do the wheels make? rev/min

8. ## Physics

When a driver brakes an automobile, the friction between the brake drums and the brake shoes converts the car's kinetic energy to thermal energy. If a 1750-kg automobile traveling at 28 m/s comes to a halt, how much does the temperature rise in each of the

9. ## physics

The block in the drawing has dimensions L0×2L0×3L0,where L0 =0.5 m. The block has a thermal conductivity of 150 J/(s·m·C˚). In drawings A, B, and C, heat is conducted through the block in three different directions; in each case the temperature of the

10. ## physics

A 1500kg car is approaching the hill shown in the figure at 15.0 m/s when it suddenly runs out of gas. Part A What is the car's speed after coasting down the other side?

11. ## Physics

The tine of a tuning fork, when struck, has an amplitude of 0.13 cm. If the frequency of the fork is 200 Hz, what total distance will the tine travel in 1.0 minute?

12. ## PHYSICS

Lake Erie contains roughly 4.00 1011 m3 of water. (a) How much energy is required to raise the temperature of that volume of water from 9.0°C to 11.0°C? J (b) How many years would it take to supply this amount of energy by using the 1250-MW exhaust

13. ## Math

A rocket is launched from ground level with an initial vertical velocity (v0) of 176 ft/s. After how many seconds will the rocket hit the ground? (Hint: h(t) = -16t2 + v0t + h0)

90. ## Chemistry

Calculate the de Broglie wavelength, in nanometers, associated with a 145 {\rm g} baseball traveling at a speed of 162km/h

All of the following are concerns about maquiladoras, factories on the United States-Mexico border, except a. they severely lower the GNP of Mexico. b. they negatively impact people’s health. c. they provide tedious work for low pay. d. they create air

asked by rawr... im a dinosaur.... rawr

12. A primary reason for the war of independence from Spain was __________. A) pressure from the United States to introduce a democracy B) the unwillingness of Spain to modernize the country C) the unhappiness of the criollos at the privileges reserved

asked by rawr... im a dinosaur.... rawr
93. ## Stats

In one study of smokers who tried to quit smoking with nicotine patch therapy, 36 were smoking after one year after the treatment, and 34 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among smokers who

94. ## calculus

the height in feet of a rocket from ground level is given by the function f(t)= -16t^2+160t. what is the instantaneous velocity of the rocket 3 seconds after it is launched? A 32 feet/sec B 64 feet/sec C 12 feet/sec D 10 feet/sec E 8 feet/sec

116. ## general

Topics such as mental health, and career choices are discussed in ............. education. a. lifespan b. consumer c. industrial d. preschool

117. ## BIOLOGY

An animal has the genotype Cc for a particular trait. If, through meiosis, a certain female produces 100 eggs, how many of these eggs would have the C gene?

118. ## physics

A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.50 N is applied. A 1.100 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the

119. ## physics

A large block P executes horizontal simple harmonic motion as it slides across a frictionless surface with a frequency f = 0.3 Hz. (a) What is the angular velocity of this system?

120. ## 5th grade Language Arts

Thanks Ms. Sue! I have other sentences I would like to try to get right. 1. Mr. Morton, the best reading teacher in the world, taught me sentence structure. Complex: Mr. Morton taught me sentence structure = indep & best reading teacher in the world = dep

121. ## chem101

The equilibrium under investigation is : H2CO3(aq) * H2O(l) + CO2(g) How does the pulling and pushing of the plunger affects the equilibrium? Is it consistent with LeChatelier's principle? my answer is that if you push you increase the pressure volume

122. ## Math

The ratio of the width to the height of most television screens is 4 to 3. If a television screen is 28 inches wide how tall would the screen be? A.12 B.15 C.21 D.25 C? The ratio of girls to boys in Mrs.Hughes classes is 9 to 10. If there are 81 girls in

123. ## applied math

At 1.25 per square foot what is tjh cost of cleaning a rug with dimension 9 ft.3 in.by 6feet 9 in,?

124. ## Biology

Should companies that market high-solute beverages be able to say these drinks quench your thirst?

125. ## gallegos

"Robert can swim the first 50 meters of a race in 1 minute. Then he slows down by 12 seconds for each of the next 50 meters of a race. How long will it take Robert to swim a 400-meter race?

126. ## Math

The ratio of blue to red cars in the parking lot is 3 to 5. If there were 60 red cars how many blue cars would there be? A.50 B.40 C.38 D.36 How do you solve it

127. ## calculus

The voltage (V) applied to a 0.25 F capacitor is given by the equation : v= (t^2-2t)^3/5t Find the current at t = 3.7 s. (i=C dv/dt) Round to 3 significant figures

128. ## math

A pair of dice are rolled find the following, a) the probability of doubles, b) the odds in favor of a sum greater than 2, c) the probability of sum that is even and less than 5

129. ## math

If franco is ordering lunch with a drink,sandwich,and a salad.He has the choice of 3 drinks,2 sandwichs,4 salads how many possible lunches are there? Tamara has 4 times as many pages to read for her book report as maria.Tamara has 20 pages left to read.How

130. ## Science

At a county fair, a boy takes his teddy bear on the giant Ferris wheel. Unfortunately, at the top of the ride, he accidentally drops his stuffed buddy. The wheel has a diameter of 15.3 m, the bottom of the wheel is 3.37 m above the ground and its rim is

131. ## English

1. I think the gymnastics club is more popular than the dancing club. 2. I think the horse racing club is more popular than the archery club. 3. I think the figure skating club is the most popular club in my school. (Are they all grammatical?) 4. I think

132. ## chem

what will happen to bromothymol blue indicator: a.) after addition of HCl, how does it affects the equilibrium b.) after addition of NaOH, hoe does it affect the equilibrium c.) after re-addition of NaOH Rewrite the net equation for the equilibrium? is

133. ## physics

A large block P executes horizontal simple harmonic motion as it slides across a frictionless surface with a frequency f = 1.7 Hz. Block B rests on it, as shown in the figure, and the coefficient of static friction between the two is ìs=0.64. (b) What is

134. ## Accounting

. Journalize the following transactions using the perpetual inventory method. Aug. 6 Purchased $830 of inventory on account from Johnston with terms of 2/10, n/30. Aug. 8 Purchased$2,611 of inventory for cash from Pillner Company. Aug.15 Paid for August 6

135. ## chemistry

If, at a particular temperature, the average speed of CH4 molecules is 1000 mine/hr, what would be the average speed of CO2 molecules at the same temperature?

136. ## Science

You are holding the axle of a bicycle wheel with radius 30 cm and mass 1.07 kg. You get the wheel spinning at a rate of 79 rpm and then stop it by pressing the tire against the pavement. You notice that it takes 1.11 s for the wheel to come to a complete

137. ## Math

Please check my answer to see if I got it right. Braden has 1 hour of math homework to do. He spends 2/5 of this time complaining about how much he hates math, 1/3 of the total time looking for his calculator. How much time does Braden actually work on his

138. ## statistics

the average student sends about 200 text messages a day with the standard deviation of 25 texts.(show graph) a.what is the probability that a student sends more than 250 messsages a day? b.what is the probability that student sends less than 150 text

Homework - Pick 4 out of the 6 forms (types) of energy and gives an example of each from your house. Types/Forms of Energy 1. Mechanical Energy 2. Electrical Energy 3. Electromagnetic Energy 4. Heat Energy 5. Chemical Energy 6. Nuclear Energy I'm picking

140. ## Chemistry

How can I rank these substrates from fastest to slowest reacting? In an SN2 reaction with NaI-Acetone? Based on theory alone? benzyl chloride n-butyl bromide n-butyl chloride sec-butyl chloride tert-butyl chloride

141. ## English

This is new to me if someone could please explain how to do this it would be great. Sentence Patterns:draw vertical lines to identify the slot boundaries in the following sentences; label each slot with its form and function. In parentheses at the end of

142. ## math

A pair of dice are rolled find the following, a) the probability of doubles, b) the odds in favor of a sum greater than 2, c) the probability of sum that is even and less than 5

143. ## math

Lena bought a total of 20 postcards. She bought 6 more large poscards than small. Write a system of equations that represents the postcards Lena purchased. Solve the system by substitution. Interpret the solution.

161. ## time value

For the last 19 years, Mary has been depositing $500 in her savings account , which has earned 5% per year, compounded annually and is expected to continue paying that amount. Mary will make one more$500 deposit one year from today. If Mary closes the

162. ## Physics

In each cycle of its operation, a heat engine expels 6,100 J of energy and performs 1,300 J of mechanical work. (a) How much thermal energy must be added to the engine in each cycle? (J) (b) Find the thermal efficiency of the engine. (%)

163. ## math

Alicia went on a steamboat ride up the Mississippi River. The boat travels 20 miles per hour in still water. How long will it take her to travel 144 miles upstream if the current of the river is 8 miles per hour?

164. ## math

A pair of dice are rolled find the following, a) the probability of doubles, b) the odds in favor of a sum greater than 2, c) the probability of sum that is even and less than 5

165. ## physics

A 66.0 kg rider sitting on a 7.1 kg bike is riding along at 9.4 m/s in the positive direction. The rider drags a foot on the ground and slows down to 6.5 m/s still in the positive direction. What is the change in momentum of the rider and bike?

166. ## algebra

if 5 times the first number plus 3 times the second number equals 47 and 10 times the first number minus 4 times the second number equals 54, what are the numbers? please explain the steps

167. ## physics

A spring of negligible mass stretches 2.20 cm from its relaxed length when a force of 10.5 N is applied. A 1.1 kg particle rests on a frictionless horizontal surface and is attached to the free end of the spring. The particle is displaced from the origin

168. ## geometry

draw a triangle abc with abc ab =4.5 ,angle abc=35,angle acb=65

169. ## math

you earn 1o dollars per hour and 20dollars per hour while cleaning houses you need to earn at least 1000 during the summer. write an expression to represent the amount of money earned while babysitting?

170. ## posibility

A pair of dice are rolled find the following, a) the probability of doubles, b) the odds in favor of a sum greater than 2, c) the probability of sum that is even and less than 5

171. ## math

write y2-14x-4y-66=0 in standard form. Identify the focus, vertex, axsis of symmetry, and directrix. (This one has me completely stumped good luck)

172. ## chemistry

If, at a particular temperature, the average speed of CH4 molecules is 1000 mine/hr, what would be the average speed of CO2 molecules at the same temperature?

173. ## math

The number of individuals N in a population of a certain species is given by the following function of time, t: N(t)= 100/(1+9e^-t), t>=0 a.)how many ppl are in the population initially(at t=0) b.)determine the size ofa the populations as tgoes towards

174. ## Chemistry

Use Planck's equation (E=h \nu) to determine the energy, in kilojoules per mole, of radiation of frequency 4.00×1014s^{-1} .

175. ## math

i am a two digit number less than 50. if u put me in groups of 4, there is nothing left. the sum is 7 who am I/

176. ## Accounting

Journalize the following transactions for Tammy Company: Sept. 1 Sold $3,500 of merchandise to Jim on account Oct. 1 Exchanged Jim’s account receivable for a fourmonth, 8% note for$3,500 Dec. 31 Recorded accrued interest on Jim’s note Feb. 1 Jim paid

177. ## math

write y2-14x-4y-66=0 in standard form. Identify the focus, vertex, axsis of symmetry, and directrix. (This one has me completely stumped good luck)

178. ## Science

In a hydrate, what source or error would cause the value of x to be lower than its actual value?

179. ## general

Literary themes understood by all people regardless of their background or the time they live in are a. universal b. shill-based c. motivational d. literature-based I think "d" bt not sure 100%

180. ## chemistry

A solution which contains 40.3 g of an unknown molecular compound in 360 g of water freezes at -5.07°C. What is the molar mass of the unknown?

181. ## Math

A decade is 10 years. Which expression gives the number of years in d decades, 10+d, 10d, or d÷10. Explain your choice.

182. ## Physics

n a running event, a sprinter does 5.5 105 J of work and her internal energy decreases by 8.8 105 J. (a) Determine the heat transferred between her body and surroundings during this event. _____J (b) What does the sign of your answer to part (a) indicate?

183. ## Physics

A Carnot engine operates between 170°C and 23°C. How much ice can the engine melt from its exhaust after it has done 4.5 104 J of work? (kg)

184. ## differential calculas

The angular displacement in radians is given by: θ=8√(t^2+2) Find the angular velocity and angular acceleration at t = 0.25 s

185. ## Classifyng triangles

Tell wether the statement is always, so Etimes, or never true. Justify your reasoning and i clude example .The sum of any two angle measures in an acute triangle is greater than 90 degree.

186. ## math help

need to completely simplify (10-7)to the 3rd power + 15/3 is it 32? thanks

187. ## Hi

make a table using points along the graphed linear function .Then, determine the correct function.

188. ## Physics

two equal charges exert an elecrtric force on each other of 0.0385 when positioned 0.15 apart determine the magnitude of the charge on each point.

189. ## Physics

A 1.1 kg block slides along a friction-less surface at 1.4 m/s. A second block, sliding at a faster 4.3 m/s, collides with the first from behind and sticks to it. The final velocity of the combined blocks is 2.6 m/s. What was the mass of the second block?

196. ## math, trigonometry, physics

Before a tidal wave the sea level usually drops first leaving the seabed exposed. (normally about 30 feet below sea level) then it rises an equal distance above sea level. Waves hitting a city with a maximum height of 38.9 meters. The cycle of rise and

197. ## Physics

The surface of the Sun is approximately 5,650 K, and the temperature of the Earth's surface is approximately 295 K. What entropy change occurs when 6,000 J of energy is transferred by heat from the Sun to the Earth? ______J/K

198. ## Chemistry

What is the molality of a solution formed by dissolving 1.95 mol of KCl in 17.0 mol of water (MM of water = 18.02 g/mol), answer in 3 sigfigs?

199. ## algebra

I need the algebra sentence for the following problem..Adam is 3 times as old as Cynthia and Fred is 16 years younger than Adam. One year ago, Adam's age was twice the sum of Cynthia's and Fred's age.Find their present age.

200. ## gvernemnt

purpose of a filibuster is to

201. ## chemistry

the gas contained in a piston is compressed from an original volume of 1.15 L to a new volume of 0.45 L. Assuming that the temperature of the gas remains constant what is the new pressure exerted on the gas if the original pressure was 2.15 atm?

202. ## math

Convert the following credit card rate to the APR. Nebraska, 0.04110% daily rate. (Round your answer to the nearest whole number.)

203. ## Quantitative Analysis

43) Twelve randomly-chosen students were asked how many times they had missed class during a certain semester, with this result: 2, 1, 5, 1, 1, 3, 4, 3, 1, 1, 5, 18.

204. ## math

If evelyn practices the piano for 45 mins every day, how many minutes does she practice the piano in one year? Please solve. Thx

205. ## Factors

1•How can adding doubles help you to multiply by 2? Give an example. 2•If the ones digit of a number is greater than 1 is 0, what factor or factors must that number have? 3•How to u know that 5 is a multiple of 5?

206. ## geography

Can you check my answers please? 1.What does a circle with a star or dot in its middle usually mean on a map? What name would be next to this symbol in Chile? It usually means the capital of a state or country. This would be Santiago for Chile. 2. In

207. ## science

Carnival mirrors make reflections look very odd. What makes the reflections in these mirrors so strange?

208. ## psychology

Hi I have 2 questions i am searching for the proper answer on and it keep finding conflicting information> 1) Psychologist who believe in ___ are most likely to attempt to understand diversity in ethnic background as an influence on behavior: individual

209. ## statistics

The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes.(show graph) B. what is the probabilty that a diver stays under for the less than 53 minutes? c.what is the probabilty that a diver stays under between 25

210. ## statistics

The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes.(show graph) B. what is the probabilty that a diver stays under for the less than 53 minutes? c.what is the probabilty that a diver stays under between 25

211. ## math

janes math scores were 96 percent 84 percent 92,and 87 percent.what is the average of her score

212. ## math

Given the function f(x)=x^4−6x^2 a.) Find all values of x where local extrema points occur b.)find all values of x where inflection points occur c.) find all local extrema of f(x) d.) find all global extrema of f(x) over the closed interval [-2,3]

213. ## physics

12. The ratio of the tensile (or compressive) strength to the density of a material is a measure of how strong the material is “pound for pound.” (a) Compare tendon (tensile strength 80.0 MPa, density 1100 kg/m3) with steel (tensile strength 0.50 GPa,

214. ## Physics

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 60.8-kg man just before contact with the ground has a speed of 5.31 m/s. (a)

215. ## physics

nucleus of oxygen-15 undergoes electron capture. Write out the reaction equation and determine the identity of the daughter nucleus

216. ## physics

what is the force per meter on a wire carrying 7.5A current when perpendicular to a 0.70T field?

217. ## math

Mr.Jacobsen wants to hire a magician for his son's birthday party. Marion has a travel fee of $30 and charges$15 per hour. Gregory has a travel fee of$50 and charges$10 per hour. Define a variable. Then write a system of equatins to represent the

218. ## calculus

Find the instantaneous velocity and acceleration at the given time for the straight-line motion described by the equation: s= (t+2)^4- (t+2)^(-2) at t=1 Round to one decimal place.

219. ## math word problems

sal got into an elevator and went down 3 floors then went up 4 floors, then down 5 floors. he was then on the second floor. what floor did he get into the elevator?

220. ## physics

A 500N force is applied to a 25 kg block and accelerates it at 15 m/s^2. What is the force of friction?

221. ## geometry

Given: ÚA ≅ÚE CF bisects ÚECA Prove: ¢AFB≅ ¢EFD

222. ## MATH

A submarine was floating on the water. It went under the water at a rate of 0.5m/second for 3 minutes. It then started to rise towards the surface at a rate of 0.7m/second for 1.5 minutes. What is the depth of the submarine?

223. ## physics

A puck of mass 4 kg is attached to a spring of force constant 100 N/m and natural length 0.07 meters. The other end of the spring is attached to a fixed pivot. The puck is set into circular motion so that the spring is stretched 0.03 meters from its

224. ## English

What is the pronoun in the sentence, He is called Spider?

225. ## math

A kitchen table has length that is two feet less than twice its width. If a table cloth with an area less that 26 square feet covers the table top, what is the length of the table?

226. ## History

4. Where do the rights of American citizens come from? from Article I of the Declaration of Independence from Congress from presidential prerogative from the Constitution

227. ## calc

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Draw a typical approximating rectangle. y = x^3 − 10x, y = 6x

228. ## English

1. I don't have any comic book in my bag. 2. I don't have any comic books in my bag. (Which one is right, comic book or comic books?) 3. He is the smartest boy in my school. 4. He is the smartest boy in our school. (Are both OK? Which one is right, 'in my

229. ## calculus

The displacement (cm) of a point is given by s= 〖4t〗^3-3√(1+2t) . Find the instantaneous velocity and acceleration at t = 1.5 sec. Round to 3 significant figures

230. ## Math

On his way to Florida Jason drove 300 miles in 5 hours If he continues to drive at this rate how far will he drive in the next 4 hours? A.20 B.60 C.150 D.240 D? Kris jogs 17 miles in 3 weeks. If he continues to jog at the same rate how many miles will he

231. ## Math

How would I solve for t if y equals 720 minutes of daylight and t=the number of days in 2012 720 = 713.7+152.7 sin [(2pi/366)(t-80.75)]

232. ## algebra

Light intensity of water equation log I/12=-0.0125 What depth will the light intensity be half that of surface?

233. ## Programming

Describe a programming project or situation in the workplace that would lend itself to one-dimensional array usage.

234. ## Chemisty

how many mole of calcium sulfate are in a 100mL of .86M solution?

235. ## pre calc

What is the left-hand limit of f(x) = |x-3|/x-3 as x approaches 3? A.1 B.2 C.0 D.-1 E.-2

236. ## math

Two cards are drawn without replacement from a standard deck of 52 cards. Find the probability a) both cards are red ,b) both cards are the same color, c) the second card is a king given that the first card is a queen, d) the second card is the queen of

237. ## chemistry

If, at a particular temperature, the average speed of CH4 molecules is 1000 mine/hr, what would be the average speed of CO2 molecules at the same temperature?

238. ## chemistry

the gas contained in a piston is compressed from an original volume of 1.15 L to a new volume of 0.45 L. Assuming that the temperature of the gas remains constant what is the new pressure exerted on the gas if the original pressure was 2.15 atm?

239. ## Economics

Derive the profit level at this profit maximizing levels of p and q (p = 55) and q = 50. Where the demand curve for a monopoly is p=105-q. Its cost function is C= 100+5q?

240. ## wilson school

the flag that nico waves has an odd number in the one place and an even number in the tens place

241. ## Geometry

Trapezoid WERI has legs WI and ER. If WERI is isosceles and if m

242. ## science

What is energy flow? Why is it important? (Use the cow as your example)

243. ## Accounting

Below is a list of treatments of accounting topics. Place GAAP on the line if the treatment is GAAP-based and place IFRS on the line if the treatment is IFRS-based. A. Interest and dividend income are reported in the investing section of the cash flow

244. ## factors

How do u know that 5 is a multiple of 25?

245. ## Chemistry Help

Which direction will the reaction 2NO + O2 2NO2 move if the initial partial pressure of all the species present is 0.50 atm? Show the calculation of Q to support your answer.

246. ## social studies

Explain whether the following statement is a fact or an opinion: "Capitalism is a better system of government than communism." Give reasons for your answer.

247. ## Physics

Suppose the ruler in procedure 3 is asymmetrical, balancing at the 60.2 cm mark. The ruler is now supported at the 41.3 cm mark, and a mass of 364 g is placed at the 26.2 cm mark. Find the mass of the ruler. T=rF

248. ## ALG 2!!!

9. Write an equation of a line that passes through (9,-5) and (3,-5). Hint: To answer this question, first find the slope using these 2 points. 10. Write an equation of a line that passes through the points (2,3) and (2,-6). Hint: To answer this question,

249. ## physics

During winter break, the police department in your hometown asks you to consult in the investigation of a traffic accident that occurred in a large parking lot. It seems that a car was backing out of a parking space when a pickup truck plowed straight into

250. ## physics

nucleus of oxygen-15 undergoes electron capture. Write out the reaction equation and determine the identity of the daughter nucleus

251. ## physics

What length of pendulum has a period of 0.9 s on Earth?

252. ## optics

Transpose the prescription -0.75DS/-3.25DCx30 to the toric form with a capstan-form surface which has a +2.50D base curve

253. ## chemistry

A beaker containing salt solution and thistle with water sealed at its end with a semi permeable membrane, qhat gappend when the apparatus is assembled?

254. ## probability

Chris has a chance of making par on each hole that he plays. Today he plans on playing only four holes. Find probability of each event. A) he makes par on at least one hole. B) he makes par on the first two holes and the fourth hole.

255. ## chemistry

if a car tire has a pressure of 320 kPa at 25 degrees celsius, what will the pressure be when the tempertature is 55 degrees celsius?

256. ## Physics

Examine the table below as the spearation distance is doubled ow much does the electrostatic forces decrease? 1 20.0 Cm 0.1280N 2 40.0 cm 0.0320N 3 60.0 Cm 0.0142N 4 80.0 CM 0.0080N 5 100.0 CM 0.0051

257. ## chem

what would happen to the aacuracy and precision of measurements if the mass is measured to a tenth of a gram instead of a thousandth of a gram?

258. ## Physics

A 2.50 kg wheel has a diameter of 20.0 cm and is rotating at 3600 rpm. A force acts on it causing it to come to a rest in 10.0 seconds. What is the magnitude of the force?

259. ## Chemistry

Hi, I need help with something. What are the correct formulas and names of manganese and oxygen compounds.

260. ## science

What is the molar concentration of 25cm3 hydrogen peroxide when potassium permanagate(vii) has a concentration of 0.02 mol/dm3

261. ## math, trigonometry, physics

Before a tidal wave the sea level usually drops first leaving the seabed exposed. (normally about 30 feet below sea level) then it rises an equal distance above sea level. Waves hitting a city with a maximum height of 38.9 meters. The cycle of rise and

262. ## calculus

What is the value of this limit? lim (x^2+4/^2-3x+1) x->4 A. 1 B. 4 C. 5 D -oo E. oo

263. ## programming

Develop psuedocode to control operation of vending machine The ACME Company has approached you with a request to develop the psuedocode that will control the operations of their new series of vending machines. The program will be required to maintain the

264. ## English THE GREAT GATSBY

1. Fitzgerald creates purpose in Chapter 1. What was his purpose and how does he go about doing it? 7. Write a Gatsby-esque sentence. Make it colorful. My sentence is below... does it make sense? Life to some in New York may seem very Gatsbyesque, what

265. ## math

e/7-3=-5 What does e equal? Please show work!

266. ## calculus

what is the value of this limit lim ( (square root x^2+7) +5) x->-3 A 7 B 5 C 3 D 10 E 9

267. ## social studies

I need help on these questions: 1. _____________ was the first permanent ______________ settlement in the ________________. 2. The ____________ went to war with the settlers because they wanted to keep the land for ____________ and ______________.

268. ## calculus

what is the slope of the tangent line passing through the point (2,3) of the graph of this function? f(x)=x^2+2x-5 A 1 B 2 C 3 D 4 E 6

269. ## differential calculas

Find the instantaneous velocity and acceleration at the given time for the straight-line motion described by the equation: s= (t+2)^4- (t+2)^(-2) at t=1 Round to one decimal place.

270. ## math

find first 4 terms of following sequence: a1=-6 abd an=2an-1+3 for n >2

271. ## calculus

A point moves along the curve that has the parametric equations: x=9t^3- 〖6t〗^2 and y= 〖9t〗^3+27 x and y being in yards and t being in minutes. Find the magnitude and direction of the acceleration when t= 5/2. Round answers to 3 significant

272. ## statistics

The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes.(show graph) B. what is the probabilty that a diver stays under for the less than 53 minutes? c.what is the probabilty that a diver stays under between 25

273. ## Health

I have a swollen lymph node under the jaw for nearly eight months. What are the causes?

274. ## MATH

There are 3 gardens below. They are all joined. Garden A and C are are perfect squares. A is 121 m2 and C is 169 m2. What is the area of garden B? Label all the dimensions and then find the perimeter of the entire three gardens that are joined together?

275. ## English

Why do you use "for" instead of "on" when you are talking about responsibilities? For example, if you wrote "they have these responsibilities for the house" why is it "for" not "on"?

276. ## social studies

Explain whether the following statement is a fact or an opinion: "Capitalism is a better system of government than communism." Give reasons for your answer.

277. ## Physics

Billy, whose mass is 55.2kg, is on his way to work after an ice storm when he accidentally slips on a huge patch of ice whose coefficient of sliding friction is 0.032. What force of friction will eventually bring Billy to a stop?

278. ## ALG 2!!!

a) What is the slope of the line through the points (5, 2) and (5, -3)?

279. ## calc

find the absolute maximum and minimum for f(x) = x+ sin(x) on the closed interval [0, 2pi]

280. ## calc

f(x) is a polynomial function such that f(-2)=5, f'(-2)=0, and f''(-2)=+3. The point (-2,5) must be an _______ of the graph of f(x) A) relaltive max B) intercept C) point of inflection D) relative min

300. ## College International Affairs

How did the US affect the dissolution of the Soviet Union? What was the US/ Soviet Union relationship at the time period?

301. ## science

Carnival mirrors make reflection look very odd. What market the reflections in these mirrors so strange?

302. ## sfg

if a car travels a distance of 300km in 4 hours then how much is the distance travelled per hour

303. ## science

Carnival mirrors make reflections look very odd. What market the reflections in these mirrors so strange?

304. ## Real Estate Finance

If your lending institution is willing to give you an 85% loan/mortgage on a house valued at $150,000 and you already have given a$5,500 earnest money deposit, how much additional cash will you need for your downpayment?

If bank wished to earn $6,300 on a loan over twelve months, what interest rate would the bank have to charge? asked by tmouery 306. ## general THE WEB SHOW ERROR. DOES NOT GO THROUGH asked by kan 307. ## algebra convert 8.26 (10)^7 to decimal notation asked by cheryl North 308. ## english How to write a Solar System poem? asked by kina 309. ## statistics sing the 95% confidence level and the 11th grade male writing scores in the Class Data file, you would expect the lower end of the confidence interval to be approximately what value?" Answer asked by Anonymous 310. ## math Jack's dad is tiling his shower. On one wall, he will use 9 rows of 14 tiles. The 4 center tiles in the top 2 rows will have a special design on them. How many of the tiles will not have a design of them? asked by Mia PLEASEEEE 311. ## Math-Probability A horse wins 12% of its races on dry tracks, but only 6% of its races on wet tracks. A certain race track is dry 80% of racing days and wet 20% of racing days. a)What is the probability that, on a random day the track is wet and the horse wins? b) What is asked by cd 312. ## Simmons How is guilt a powerful force in human life asked by Kathy 313. ## MATH URGENT A submarine was floating on the water. It went under the water at a rate of 0.5m/second for 3 minutes. It then started to rise towards the surface at a rate of 0.7m/second for 1.5 minutes. What is the depth of the submarine? The hint my teacher gave me asked by Spike 314. ## math calculus what does this function show at x=5? f(x)=^2-25/x-5 A. removable discountinuity B. jump discountinuity C. infinite discountinuity D. Countinuity E. None of the above asked by Disha 315. ## math (calculus) A line segment has one endpoint, A, on the x-axis and the other endpoint, B, on the y-axis. It passes through the point (1,2). If O is the point (0,0), for what value of angle OAB is the length of the line segment AB a minimum? What is the minimum length? asked by Garry 316. ## 5th grade Language Arts I need help classifying sentences (compound, complex, compound-complex). Here's the sentence: I got in trouble so I can't go to the party, but it would have been fun. I answered it was complex which I got wrong. asked by Alex 317. ## Research What is the difference between "findings & analysis" in a research paper? Let me know if I'm on the right path or if I'm deluded. I understand that in the findings section is where I will report on what I've discovered in the research. I will cite and show asked by Julian 318. ## differential calculas A rocket fired at 275 m/s at 36o angle of elevation is described by: x= (275cos〖36〗^0 )t and y= (275sin〖36〗^o )t-4.9t^2 Find the velocity (magnitude and direction) at t = 8 s. Round to 1 decimal place. asked by Preet 319. ## English I need to do a research paper. The assisgnment is research Christmas back to its ancient origins. Can you recommend some sites I can look into? asked by Vicky 320. ## English 1. Tom has not to buy a book. 2. Tom doesn't have to buy a book. (Are both the same? Is #1 wrong?) asked by rfvv 321. ## Statistics help? Hi there, I was looking for any assistance or help on how I would go about starting this assignment? Having difficulty understanding it. Thank you in advance. "A stats instructor is interested in investigating time of day his lectures were held on student' asked by Evan 322. ## math 3 A fruit farm sells a 10 lb box of navel oranges for$42. If the farm sells 374 of these boxes, how much money will it make? Please solve thx

Kale is building a small basement suite. The bathroom takes up 1/3 of the suite and has an area of 12m2. 1. Draw the room and label all the areas 2. what are the possible dimensions of the bathroom? 3. what is the area of the rest of the suite without the

324. ## math

write 1.4times 10 to the eighth power in standard notation

325. ## science

Carnival mirrors make reflections look very odd. What market the reflections in these mirrors so strange?

326. ## geometry

can a triangle have sides with the given lengths 4in. 4in. 4in.

327. ## Microsoft word,excel

The insert chart feature does not allow you to do what to a chart?

328. ## math

560.1 divided by 3

329. ## English

Tom's popularity index is 30%. The popularity index is 30%. (Are they grammatical?)

330. ## chem

If equilibrium favors the right side of the equation, is the value of Keq a realtively large or small number? Breifly explain. pls. help

331. ## Physics

The period of A soundwave emitted by a vibrating guitar string is 3.0*10^-3s. If the speed of the soundwave is 360 m/s, what is its wavelenth?

345. ## algebra

convert to decimal notation. 8.26(10)^7

346. ## math

how do you do front end estimation

347. ## maths

scale for actual size 12m,and drawing size 3cm

348. ## math

for the equations y=5x+50 and y=6x+25, for how many hats will the cost be the same and what is that cost?

Kale is building a small basement suite. The bathroom takes up 1/3 of the suite and has an area of 12m2. 1. Draw the room and label all the areas 2. what are the possible dimensions of the bathroom? 3. what is the area of the rest of the suite without the

What would you say is the biggest influence on Mexico's economy?

asked by rawr... im a dinosaur.... rawr
351. ## Math

Please check my answers and if there are any other possibilities then please tell me. List all the factors for 45: I got 1x45, 3x15 and 9x5. are there anymore?

352. ## Itroduction to finance

Anaswer all questions You have been commissioned to analyse the financial statements of MILOPA LIMITED. Below are the Consolidated statement of financial position and the Statement of Comprehensive Income of the companies. STATEMENTS OF FINANCIAL POSITION

353. ## math

the lengths of two legs of a right triangle depend on time. One, whose length is x increase at the rate of 5 feet per second, while the other, of length y, decreases at the rate of 6 feet per second. At what rate is the hypotenuse changing when x=3 and

354. ## chemistry

What is the final daughter nuclide for 131I ? How is it determined?

355. ## Algebra 2 ..

Simplify. 4i ( What are the rules for simplifying these imaginary numbers?)

the press was invented about 1450 and had little change for 350 years. since then many changes have been made. how many decades have changes been occurring?

357. ## math

write a situation with a algebraic exprassion that can reprsened x+3

358. ## math

how do you put three more than a product of a number and 4 is 15 into a problem

359. ## nuclear biological weapons

how would you respond to this? the enemy is beginning to manufacture chemical and biological weapons at a factory in the center of a large town

360. ## college algbra

find the domain f(x)=x/x-8,g(x)=-7/x solve the following exponential equation equation exact answers only 3e x-1 = 2+e^x-1

361. ## science

a glass contains 200cm3 what is the mass in the glass

362. ## math

what is the prime factorization of 1050