# Questions Asked onApril 22, 2012

1. ## ap physics

At serve, a tennis player aims to hit the ball horizontally. part a)What minimum speed is required for the ball to clear the 0.90m--high net about 15.0m from the server if the ball is "launched" from a height of 2.50m ? part b)here (relative to server)

2. ## Chemistry

How much heat is required to warm 229 g of ice from -45.3°C to 0.0°C, melt the ice, warm the water from 0.0°C to 100.0°C, boil the water, and heat the steam to 173.0°C?

3. ## Physics

an oil layer floats on 87 cm of water in a tank. the pressure at the bottom of the tank is 120.0 kPa. How thick is the oil?

4. ## physics @ elena

can you please help me with this one At serve, a tennis player aims to hit the ball horizontally. part a)What minimum speed is required for the ball to clear the 0.90m--high net about 15.0m from the server if the ball is "launched" from a height of 2.50m ?

5. ## Physics

When violet light of wavelength 415 nm falls on a single slit, it creates a central diffraction peak that is 8.80 cm wide on a screen that is 2.75 m away. How wide is the slit?

6. ## english

Put parentheses around the prepositional phrases. Identify the subject, verb, and any complements (direct object, indirect object, subject complement, objective complement). 1. Take the box to your mother. 2. Sandy's throw to first base was short. 3.

7. ## math

the population of Canadian city is modeled by P(t)= 12t^2 + 800t + 40,00, where t is the time in years. when t=0, the year is 2007 A) according to the model, what will the population be in 2020? B)in what year is the population predicted to be 300,000?

8. ## math

a steel ball weighing 128 lb is suspended from a spring, whereupon the spring is stretched 2 ft from its natural length. the ball is started in motion with no initial velocity by displacing it 6 in above the equilibrium position. assuming no damping force,

9. ## Physics

A 2.11 cm high insect is 1.31 m from a -125 mm focal-length lens. Where is the image? Distance of the image is ? How high is it? What type is it?

127. ## Algebra

What is the perimeter of a computer graphic with sides measuring: 2 times the square root of 50, 3 times the square of 72, 6 times the square root of 98, and 3 times the square root of 12 centimeters?

128. ## Life orientation

In 10-15 lines critically discuss 5 ways in which the human or envirmnmental problem on the community.provide relevant sources to support the claims.

129. ## English - ms. sue

ms. sue i have to write two paragraphs one in which i just say what type writer i be and the other one be explaining what type metaphor i be. for paragraph which tell what type writer i be, i hve little bit stuff i add, but i not know what else to say

130. ## physics

The Kâ characteristic X-ray line for tungsten has a wavelength of 1.94 10-11 m. What is the difference in energy between the two energy levels that give rise to this line? Express this in each of the following units. (a) joules (b) electron volts

131. ## math

prove that the diagonals of isosceles trapezium are equal

132. ## History

Can someone explain how the term regime relates to LAPD SWAT because i am getting confused. Thank you :)

133. ## chemistry

calculate the pressure when 57 g of flourine at 55 degrees celsius is confined to a 152 liter container.

134. ## physics help!

Using the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50 protons.

135. ## Physics

The interatomic spacing in a crystal of table salt is 0.281 nm. This crystal is being studied in a neutron diffraction experiment, similar to the one that produced the photograph in the figure. How fast must a neutron (mass = 1.67 x 10^-27 kg) be moving to

136. ## Algebra

Multiply: (6 times square of 5 + square root of 5)(square root of 3 - 4 times square of 5) Note: How do I type the symbol for square root?

137. ## math

ABCD a parallelogram in wich AB=6.5cm,AD=4.8cm,BD=5.7cm.what will be the measure of its diagonals

138. ## English - ms. sue

ms. sue i also want to say this about leaves that they draw energy from their surroundings but how i make that relate with me?

139. ## PHYSICS

Q: AN OBJECT IS MOVING PAST YOU IN A STRAIGHT LINE WITH A CONSTANT SPEED. YOU CAN CONCUDED A. THAT THERE IS A CONSTANT FORCE IN THE DIRECTION OF MOTION B. THAT THERE ARE NO FORCES ACTING ON THE OBJECT C. THAT THE NET FORCE ON THE OBJECT IS ZERO D. NONE OF

140. ## Calculus 1

A 10m ladder leans against a wall at an angle theta with the horizontal. The top of the ladder is x metres above the ground. If the bottom of the ladder is pushed towards the wall, find the rate at which x changes with respect to theta when theta equals 60

141. ## Chemistry

A chemist wants to be a supercook and wants to create 8%(m/v) acetic acud solution to be "extra strength" vinegar. if pure acetic acid Is a liquid density of 1.049 g/ml. how many ml of acetic acid should be dissolved to male 500 ml of 8% acetic acid?

142. ## FACS - Reading Assignment Help!

7. Explain - Why is it important to evaluate the work plan? What might happen if team members fail to evaluate it? Answer - The reason why it's important to evaluate the work plan is because so that they understand what did correctly, what could be

143. ## Cardiovascular

-----------leukemia affects the bone marrow and develops gradually. A.acute myelocytic B. chronic lymphocytic C.acute lymphocytic D.chronc myelocytic My answer is Chronic Lymphocytic

144. ## math

in an isosceles triangle ABC ,AB=AC.if AB and AC are produced to D and E respectively so that BD=CE.prove thatBE=CD

145. ## math

line segment AB and CD bisect each other at O . join AC and BD . prove that tringle AOC congruent triangle BOD

146. ## physics

What is the longest wavelength that can be heard by a normal ear?

147. ## physics concept

An astronaut who is floating freely through space is seated upon a unicycle. He begins to pedal the unicycle “forward.” As he does so,what would the astronauts' motion be in space? Would he rotate in the opposite direction of the spinning wheel?

148. ## math

show that the measure of each angle of an equilateral triangle is 60 degree

149. ## Physics

A 2.11 cm high insect is 1.31 m from a 125 mm focal-length lens. Where is the image? Distance of the image is ? How high is it? What type is it?

150. ## Physics

I don't get this problem! Please show work. Thanks!! The de Broglie wavelength of a proton in a particle accelerator is 3.60 x 10^-14 m. Determine the kinetic energy (in joules) of the proton.

151. ## math

3 boys or 5 girls can clean a compound in 8 hours. in how many hours will 2 boy 2 girls clean the same compound

152. ## chemistry!

How many grams of NH3 can be produced from the reaction of 17.8 moles of H2 and a sufficient supply of N2? N2 + 3H2 ! 2NH3

153. ## math

A does 8/15 of a work in 8 days and the remaining work is finished with the assistance of B in 4 days . how long will B take to do the work alone

154. ## geometry

Denise poured milk into a glass shaped like a right circular cylinder with a radius of 2 inches. When she added chocolate syrup to the milk, the height of the liquid in the glass increased by 1/2 inch. What was the volume of the chocolate syrup that Denise

155. ## trig

2sec(3x-(pi/3)) Find the period.

156. ## Math

Part A Lisa has downloaded 260 songs on her mp3 player,of her260 songs, 117 are pop music. What percent of lisas songs are pop music. Part B country music makes up to 20% of lisas 260 songs. How many songs are country music .. PartA already answered I need

157. ## physics

An athlete executing a long jump leaves the ground at a 28.0 angle and lands 7.60m away. part a)What was the takeoff speed? part b) If this speed were increased by just 8.0 % , how much longer would the jump be? i got for part a)9.48 m/s but i need help

158. ## life orientation

environmental factor cause.accident .crises or disasters which negatively on our health

159. ## Transportation and Security

what are potential vulnerabilities of airplanes?

160. ## l.o

in 10-15 lines critically discuss 5 ways in which the envirommental problem impacts on the community.provide relevant sources to support your claims.

161. ## FACS - Reading Assignment Help!

THINKING CRITICALLY 6. Apply - Make a list of three (3) other activities, besides cooking, in which dovetailing would be helpful. I need help!

162. ## Algebra

During the first part of a trip, a canoeist travels 57 miles at a certain speed. The canoeist travels 13 miles on the second trip at a speed 5 mph slower. The total time for the trip is 5 hrs. what was the speed on each part of the trip? The speed on the

163. ## vhulaudzi

environmental issue

164. ## math

Observe the patterns in the sequence below. What is the missing algebraic expression in the box? Express your answer in terms of c. 5 4 5a 2a 10b b 40 2 6 ? 2 5c

I'm writing a poem and it requires me to list reasons on what you want your significant other to do to make you happy. SEEMS EASY ENOUGH, RIGHT? So I want to hear your thoughts on this particular topic :D

166. ## Physics

A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is not true?< (A) The passenger is in motion relative to the passer-by (B) The passer-by is stationery relative

167. ## transportation and cargo security

what agencies had the biggest impact on global transportation security post 9/11. would this be like... • TSA • Federal Emergency Management Agency (FEMA) • United States Citizenship and Immigration Services (USCIS) • U.S. Customs and Border

168. ## geometry

A scuba diver is at the surface of the water and preparing to swim to a shipwreck. The shipwreck is 20 meters underwater and the diver is 65 meters away from a buoy that shows where the shipwreck lies. At what angle does the diver have to swim to reach the

169. ## to ms.sue

karmen wears a wool sweater. she touches her foot on the carpet. what will happen? i said she will get shocked, but why. my friend said electrical charges flow through, but why?

170. ## Physics

A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min

173. ## marketing

Can you help me to understand what a positioning and differentiation strategies for the product would be?

The time required for a trip 108 miles downstream on a steamer is 3 hours less than the time required for the upstream trip. A boat whose rate is 6 miles per hour less than that of the steamer required 9 hours more for the upstream trip than for the

asked by My Name Is Bob
175. ## Statistics

How do I find a percentile if I only have the mean and sd? ie...what IQ score is associated with the 65th percentile?-mean is 100 and sd is 15. Thanks in advance :)

176. ## geometry

The surface area of the following square pyramid is 152 cm2. What is the slant height, l, of the square pyramid in centimeters? The base is 8cm.

177. ## SCI HW CHECK

D. Name the joint shown in each picture 1. Elmbow answer - Antecubital fossa. 2. wrist answer - carpal 3. shoulder answer - glenohumeral 4. neck vertebras answer - ????????????????? what is the joint in your neck vertebrae called?????????? can you check to

178. ## calculus

Suppose x=4sin(theta, for theta (-pie/2, pie/2). Rewrite(sqrt16-x^2)^3/x^3 (Sorry Im not very good at making symbols. I hope you know what I mean here! if not I can try to rewrite it a different way)

179. ## english

I need someone to check my answers to see if what I have is correct. I think that I finally got the hang of this. I need to underline the adjective clause in each sentence and circle the modified noun. Then I need to identify the clause as restrictive or

180. ## environment

Identify 1 environmental factor or human factor that cause ill healthy within your community withn south africa.in 10-15 lines critically discuss 5 wayz in which the environmental proplem impacts on the community.

181. ## pre-calc

simplfy the expression by double angle formula or a half angle formula. cos^2(x/2)-sin^2(x/2) 2sin(x/2)cos(x/2)

182. ## geometry

the volume of a cylinder is 88 m. If the radius of the cylinder is quadrupled, what will be the volume of the new cylinder in cubic meters?

183. ## to ms.sue

i still don't get it.

184. ## chemistry

What would the pressure be if h3 po4 was vaporized in a 20L container at a temperature of 23.5 degrees Celsius?? ( gas law)

185. ## to ms.sue

what will the sciencepssa have? magnets and electricity?

186. ## Algebra

Building windows: Window World, Inc., is responsible for designing new windows for the expansion of the campus chapel. The current design is shown in the figure. The metal trim used to secure the perimeter of the frame is 126″ long. If the maximum window

187. ## AP Calculus

Let R be the region bounded by the x-axis and the graph of y=6x-x^2 Find the volume of the solid generated when R is revolved around the y-axis

do you know where I can find in abc order all of the STATES AND THEIR CAPITALS MAYBE A LINK. THIS IS FOR MY HOMEWORK TOMORROW.....THANK YOU IN ADVANCE FOR YOUR HELP!

189. ## Life Orientation

identify and describe the environmental problem waste dumps

190. ## Chemistry

Calculate how many moles of products(s) would be produced if 0.500 mole of the first reactant were to react completely. BaCl2 + 2AgNO3 --> 2AgCl +Ba(NO3)2

191. ## algebra

the length of a rectangle is twice it's width. if it's length is decreased by 3 cm , and it's width is increased by 5 cm the result will be a square , then the perimeter of this rectangle will equal ...... cm

192. ## Chemistry help!!

A chemist wants to be a supercook and wants to create 8%(m/v) acetic acud solution to be "extra strength" vinegar. if pure acetic acid Is a liquid density of 1.049 g/ml. how many ml of acetic acid should be dissolved to male 500 ml of 8% acetic acid? It

1) Free energies of formation are a. always positive b. always negative c. never zero d. measured at 298K e. more than one response above is correct I think that free energies can be negative or postive so the answer cannot be e. I chose answer d, they are

194. ## Chemistry

Given the unbalanced equation: (NH4)2 CO3-> NH3 + CO2 + H2O Calculate the mass of ammonia gas that is produced if 1.25g of ammonium carbonate decomposes completely.

195. ## chemistry

following equilibrium system with a Kc of 1.23E-03: C3H6O (aq) + 2C2H6O (aq)--> C7H16O2 (aq) + 2H2O (l) 1.What is the equilibrium expression for this system? 2.If the molar concentrations of C3H6O2 and C2H6O are both 0.255 at equilibrium, what is the

Delta G^o for a reaction can be calculated from? 1. delta G^o f data 2. Delta H^o f and delta S data 3. equilibrium constants I chose that delta G can be calculated from H and S values. Would you agree?

197. ## Health

Jennifer is fifty-four. Her husband Brian died suddenly in a care crash. Not only was she emotionally distraught, but she found herself in serious financial turmoil. Brian had handled the finances (at least she had thought he had) throughout their 21 year

198. ## English - ms. sue

ms. sue this be ending part of my description writer paragraph, you please tell me if it be good, also what be last thing i say to conclude it well? I go through a lot of obstacles in my writing, but I’m always guided the right way. I like being in a

199. ## intermediate algebra

Factor completely.Using the AC method....6x^3-4x^2-10x

200. ## Chemistry help!

Hi! In practice, why is the volume of oxygen obtained from the electrolysis of water LESS THAN half the volume of hydrogen obtained? I'm guessing it might have to do with gases escaping? Help!

201. ## pre-calculus

(tan^2x-9)(2cosx+1)=0 Find one period 4cos^2x-4cosx+1=0 find all angles and name 8 angles 7sin^2x-22sinx+3=0 find all angles and name 8 angles 2cos^2x-7cosx=-3 find one period sinx(2sinx+1)=0 find one period

202. ## l.o

Cancer Describe life style disease \ behaviour and explain 5 factors that contribute to the disease

203. ## East Asia,and south easia

With respect to human rights issues in Southeast Asia, which statement is most accurate?

204. ## chem

The ion product Of D2O is 1.35x 10^-15 at 25 degrees C. For a solution to be acidic the PDF must be what?

205. ## chem

A distribution curve shows how fractions of non-ionized acid and its conjugate base vary as a function of Ph. The curves of the plot of [CH3COOH] vs. [CH3COO-] vs. PHwill intersect at a Ph of What?

206. ## Writing - application essay

I am writing an application essay to try and get accepted into Haywood Early College. I am writing four paragraphs and I already have 2 paragraph topics. I guess what I am trying to ask is could I possibly get help with 2 more topics?

207. ## l.o

Five ways in which you critically discuss how life style\behaviour disease impact on the teenager?

208. ## Chemistry

You are instructed to prepare 250 mL of a solution which is 50 M in NaCl and 0.10 M in acetic acid. Solid NaCl and a 3.0 M solution are avaliable. How would you prepare this solution?

209. ## Differential Equations

Find the eigenvalues and eigenfunction for the BVP: y ' ' '+ λ2 y ' = 0 , y(0) = 0, y’(0) = 0 and y’(L) = 0

210. ## Bio Anatomy

Do you guys know of any sites that talks about the gentics of occipital lobe epilepsy?

211. ## Differential Equations

Find the charge on the capacitor in an LRC series at t = 0.02 sec when L = 0.05 h, R = 2 Ohm, C = 0.01 farad. The initial conditions are q(0) = 5 C, i(0) = 0 Ampere. Determine the firt time at which the charge on the capacitor is equal to zero. Also, find

212. ## Chemistry

how many gram of Co2 are formed for every gram of CH4 that combusts

213. ## Differential Equations

The boundary value problem Ty"+ ρ(ω^2)y' = 0 , y(0) = 0, y(L) = 0 is the model of the shape Of a rotating string. Suppose T and ρ are constants. Find the critical angular speed ω = ωn for which there is non-trivial solutions.

214. ## Physics

A scuba diver has an air tank with a volume of 0.010 m^3. The air in the tank is initially at a pressure of 1.0x10^7 Pa. Assume that the diver breathes 0.400 L/s of air. Find how long the tank will last at a depth of each of the following. (a) 1.0 m min

215. ## transportation and cargo

would these agencies have the biggest impact on global transportation security post 9/11. • TSA • Federal Emergency Management Agency (FEMA) • United States Citizenship and Immigration Services (USCIS) • U.S. Customs and Border Protection (CBP) •

Using the Bohr model, estimate the wavelength ë of the Ká characteristic X-ray for a metal an atom of which contains Z = 50 protons.

217. ## English

I just wanted to know if there are alternatives to the prepositions I included. Thank you, Writeacher. 1) The students are happy about their exam results. 2) They are enthusiastic about .... 3) They are satisfied with ... 4) They are disappointed with.....

218. ## PSY

Describing CPT Catergories Check Point

219. ## Science

Effects of global warming due to methane gases from land fills and animals? Effects of global warming due to carbon dioxide from cars and factories?

220. ## Vectors?

Find an ordered triple to represent vector x in x = -6z+1/4y if vector y= and vector z = Please and thank you. Multiple Choice: a) b) c) d)

221. ## Biology

what are some medicines that help someone sleep. and what is the Chemistry Makeup of those medicines used for sleep and the effect on the brain

222. ## physics

A particle has a de Broglie wavelength of 3.30 10-10 m. Then its kinetic energy quadruples. What is the particle's new de Broglie wavelength, assuming that relativistic effects can be ignored?

223. ## Sum Of Unit Vectors?

write MN as the sum of unit vectors for M(-3/4, 5, 2/3) and N(6, -9, 3/5). Someone help me please?

224. ## Accounting

State ten users of accounting iformation and show their intrest 2 enumurate eighth qualities that accounting information must posses 3. Itemize at least eight rules of accounting in any organisation.

225. ## Physics

Radio waves are electromagnetic waves that travel at a speed of 3.00 108 m/s, the speed of light. An AM radio station has an assigned frequency of 1350 kHz, which means that the radio waves broadcast by the station are at this frequency. Find the

226. ## Rhetoric

What is the relationship between feminist theory and traditional rhetorical theory? and how do they connect?

227. ## stoichiometry

determine the number of moles in 4.50g of MgCl2?

228. ## Science

Effects of global warming due to methane gases from land fills and animals? Effects of global warming due to carbon dioxide from cars and factories?

229. ## Intermediate Algebra

If a projectile is fired straight upward from the ground with an inital speed of 96 feet per second, then its height (h) in feet after t seconds is given by the equation h(t)=-16t^2+96t Find the maximum height of the projectile.

230. ## FACS - Reading Assignment Help!

I have this reading assignment for Family and Consumer Science. She gave us this packet for notes and to read to answer questions she gave us (that's our reading assignment which she is grading). So we answer the questions and to find the answers we look

231. ## English

Is there a difference among the following sentences, Writeacher? Thank you. I included a few other sentences. He made breakfast himself. He made breakfast by himself. He made breakfast on his own. He made himself breakfast. 1) You shouldn't fuss (not make

232. ## Science 7R - Worksheet

Title of the worksheet - What is the structure and function of our skeletal system? B. Identify three bones that protect internal organs ******** There is this chart on the left it says "bone" and on the right it says "Internal Organ Protected" (there are

233. ## english

how do i write a commentary on a newspaper? I searched on google but i don't get it.

234. ## physics

A hot iron horseshoe (mass = 0.43 kg), just forged (Fig. 14-16), is dropped into 1.60 L of water in a 0.26 kg iron pot initially at 20°C. If the final equilibrium temperature is 26°C, estimate the initial temperature of the hot horseshoe. Could someone

235. ## Physics

You observe that 32 crests of a water wave pass you each minute. If the wavelength is 10 m, what is the speed of the wave?

236. ## english

Can you check my poem if it has 10 syllables per line and any other mistake? and thank you. You just didn’t know how much I loved you How hard I tried and you still didn’t know How close we were was something oh so true I don’t think it was right for

237. ## Algebra

During the first part of a trip, a canoeist travels 57 miles at a certain speed. The canoeist travels 13 miles on the second trip at a speed 5 mph slower. The total time for the trip is 5 hrs. what was the speed on each part of the trip? The speed on the

238. ## Science 7R - Worksheet (Q2)

C. Where is it located? a. The secretary went to the doctor complaining about Carpal tunnel syndrome. What is hurting her? PLEASE help!!!!

239. ## Capacitors

A parallel plate capacitor has area of 2cm^2 and a plate separation of 1mm. Find capacitance.

Every morning, I drive to work; as I get closer I can hear the cadence calling of all the basic training units on Fort Benning, Georgia. Regardless of what is on the training schedule for the rest of the day, we conduct Army Physical Readiness Training

241. ## life orientation

Five ways in which the human or environmental problem impacts on the community

242. ## Physics

A particle has a de Broglie wavelength of 3.30 x 10^-10 m. Then its kinetic energy quadruples. What is the particle's new de Broglie wavelength, assuming that relativistic effects can be ignored?

243. ## chemistry

If 33.0 mL of 0.002 M aqueous H3PO4 is required to neutralize 28.0 mL of an aqueous solution of NaOH, determine the molarity of the NaOH solution.

244. ## spanish

te question is Ella se ____ Julia. We were to pick between llama, llamas, and nombre. I think the answer is llama but a little hesitant on that