Questions Asked onSeptember 19, 2010

1. statistics

An IRS auditor randomly selects 3 tax returns from 58 returns of which 8 contain errors. What is the probability that she selects none of those containing errors?

2. Chem

f 147 grams of FeS2 is allowed to react with 88 grams of O2 according to the following unbalanced equation, how many grams of Fe2O3 are produced? FeS2 + O2 → Fe2O3 + SO2

3. physics

A child throws a ball with an initial speed of 8 m/s at an angle of 40 degrees above the horizontal. The ball leaves her hand 1 m above the ground. How long is the ball in flight before it hits the ground? What is the magnitude of the ball's velocity just

4. Chemistry

How would you prepare 1L of a .050 M phosphate buffer at pH 7.5 using crystalline K2HPO4 and a solution of 1 M HCl? pka of H2PO4 = 7.2

5. physics

Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for any length of time will not cause injury, whereas an acceleration greater than 1000 m/s2 lasting

38. ap physics

You measure the radius of a wheel to be 4.16 cm. If you multiply by 2 to get the diameter, should you write the result as 8 cm or as 8.32 cm? Justify your answer.

39. Physics

A rifle is aimed horizontally at a target 52 m away. The bullet hits the target 2.2 cm below the aim point.

40. Math

The final exam will count as two tests. Brooke has test scores of 80, 83, 71,61 and 95. What score does Brooke need on the final in order to have an 80? I thought 80+83+71+61+95 = 390 / 5 = 78 then I don't know what to do next. Although I did do 78 +2x =

41. physics

The speed of sound in air is about 330m/sec. If a lighting flash occurs 5.5 seconds before you hear the thunder how far away from you was the strike?

asked by Rose Victory
42. Physics 111

King Arthur's knights fire a cannon from the top of the castle wall. The cannonball is fired at a speed of 48 m/s and at an angle of 29°. A cannonball that was accidentally dropped hits the moat below in 1.7 s. (a) How far from the castle wall does the

43. Managerial Economics

anyone has answer to this? Discussion question As vice president of sales for a rapidly growing company, you are grappling with the question of expanding the size of your direct sales force (from its current level of 60 national salespeople. You are

44. Physics

A current of a river flows steadily from west to east at 1.00 m/s. A boat in the river travels at 3.00 m/s relative to the water. The river is 20.0 m wide with parallel banks. The boat leaves the shore at point A, and point B is directly across the river

45. Chemistry

Explain why ethanol is not soluble in cyclohexane. Also, how do you figure out whether something is polar or nonpolar?

46. Managrial Economics

Anyone has answer for this please? A New Hampshire resort offers year-round activities: in winter, skiing and other cold-weather activities; and in summer, golf, tennis, and hiking. The resorts operating costs are essentially the same in winter and summer.

47. Statisitcs

A large university campus has 60,000 students. The president of the students' association wants to conduct a survey of the students to determine their views on an increase in the student activity fee. She would like to acquire information about all the

48. physics 2

A charged line extends from y = 2.50 cm to y = -2.50 cm. The total charge distributed uniformly along the line is -9.00 nC. At what distance x does the result for the infinite line of charge differ by 1.0% from that for the finite line?

49. physics

A volleyball is deflected vertically by a player in a game housed in a high school gymnasium where the ceiling clearance is 18m. If the initial velocity of the ball is 21.5 m/s, will the ball contact the ceiling?

50. physics

Consider the 692 N weight held by two cables shown below. The left-hand cable had tension T and makes an angle of θ with the wall. The right-hand cable had tension 760 N and makes an angle of 40◦ with the ceiling. a) What is the tension T in the

51. Physics

A CD has to rotate under the readout-laser with a constant linear velocity of 1.25 m/s. If the laser is at a position 3.2 cm from the center of the disk, what are the revolutions per minute (rpms) of the disk? ***Can someone please step me through the

52. chemistry

what type of reaction is this Li + H2O --> LiOH A. Combination B. Combustion C. Decomposition Im thinking combination but the H2 is confusing me

53. chemistry

Calculate the mass in g of each of the following. a. 2.3×10^22 H2O molecules b. 6.16×10^20 SO3 molecules c. 5.0×1025 O3 molecules d. 9.82×1019 CCl2F2 molecules

54. psychology

Need two peer reviewed articles to help me work on those questions. below Discuss how social psychology differs from other related disciplines (e.g., clinical psychology, general psychology, sociology). Explain the main types of research approaches/methods

55. physics

Aerial skiing involves speeding down a steep ramp that curves sharply upward at the end to launch the skiers into the air. Once airborne, the skier twists and turns in complex combinations to score points in the competition. Consider an aerial launch ramp

56. algrebra 2

how to find the xintercept and y intercept 5y=15x-90

57. physics

A car starts from rest and travels for 5.0 seconds with a uniform acceleration of +1.5 m/s^2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s^2. If the brakes are applied for 3.0 seconds, how fast is the car going at the end

58. Ohysics

An airplane flying at 120km/h due west moves into a region where the wind is blowing at 40km/h due east. If the plane's original vecotr velocity is Vplane, what is the expression for the plane's resulting velocity in terms of Vplane. a. 1/3 >Vplane b.

59. chemistry

A scientist wants to make a solution of tribasic sodium phosphate, \rm Na_3PO_4, for a laboratory experiment. How many grams of \rm Na_3PO_4 will be needed to produce 575 mL of a solution that has a concentration of \rm Na^+ ions of 1.00 \it M?

60. Chemistry

what is the temperature change in Celsius when 29.5 L of what absorbs 2.3 kWh of heat?

61. Math

The following figure is a rectangular box in which EFGH and ABCD are rectangles and BF (with a bar on top) is perpendicular to planes EFGH and ABCD.Are BD and GH parallel?

62. Physics

a grizzly bear makes a displacement of 1563 m due west, followed by a displacenent of 3348 m in a direction 32.0 north of west. what are the magnitude and direction of the displacement needed for the bear to return to its starting point

63. Physics-Mechaincs

A block is pushed up a frictionless incline by an applied horizontal force as shown. The acceleration of gravity is 9.8 m/s2 . mass=2.7 kg F = 33 N theta=29◦ What is the magnitude of the resulting ac- celeration of the block? Answer in units of m/s2.

64. phy

A car at the Indianapolis-500 accelerates uniformly from the pit area, going from rest to 340 km/h in a semicircular arc with a radius of 196 m. Determine the tangential acceleration of the car when it is halfway through the turn, assuming constant

65. College Physics

What is the work required to move a proton 1 cm along the 7 volt equipotential line?

66. chemistry

A scientist wants to make a solution of tribasic sodium phosphate, \rm Na_3PO_4, for a laboratory experiment. How many grams of \rm Na_3PO_4 will be needed to produce 575 mL of a solution that has a concentration of \rm Na^+ ions of 1.00 \it M?

67. statistics

12. Four research participants take a test of manual dexterity (high scores mean better dexterity) and an anxiety test (high scores mean more anxiety). The scores are as follows. © …………….. (d)…………….. Person Dexterity Anxiety 1 1 10 2 1

68. physics

Two people pull as hard as they can on ropes attached to a 170 kg boat. If they pull in the same direction, the boat has an acceleration of 1.59 m/s2 to the right. If they pull in opposite directions, the boat has an acceleration of 0.518 m/s2 to the left.

69. physics

An object with uniform motion traveled 265cm in 2.4 seconds. how much time did the object take to travel the last 50cm?

70. chem

is NaCl ion dipole, or Ion Ion? my notes say ion ion but online it says ion dipole. Is NaOH2 hydrogen bond or Ion-Dipole? my class notes say ion dipole but it seems, to me, to be h-bond too.

71. chemistry

What mass of carbon dioxide is produced from the complete combustion of 8.20×10−3 g of methane?

72. Chemistry

Calculate the mass of nitrogen dissolved at room temperature in an 80L home aquarium. Assume total pressure of 1 atm and mole fraction of .78 for nitrogen

73. physics

A person looking out the window of a stationary train notices that raindrops are falling vertically down at a speed of 4.15 m/s relative to the ground. When the train moves at a constant velocity, the raindrops make an angle of 25° when they move past the

74. physics

a student throws a ball straight upwards to a height to height of 7.50m How much work did did the student do?

75. biology

energy that is lost at each trophic level of an ecosystem is replenished by????

76. Chemistry- urgent help needed

How do I prepare 40% v/v from 95% ethanol? When we say 95% ethanol, do we usually mean 95% w/w ethanol unless otherwise stated? Please show me the calculation steps to prepare 40% v/v from 95% w/w ethanol. Thanks.

77. physics

A person in a stationary, non-moving elevator drops a coin and it reaches the floor 0.6 seconds later. Now he repeats the experiment with the elevator moving. Would the coin reach the floor in less time same time or more time, if it were dropped when the

asked by Rose Victory
78. Physics

h t t p : / / b i t . l y / 9 S F F F o a) What is the minimum value of F needed to move the two blocks? b) If the force is 10% greater than your answer for (a), what is the acceleration of each block?

79. Physics

A 24 kg box is released on a 21 degree incline and accelerates down the incline at 0.27 m/s^2. a) Find the friction force impeding its motion. b) What is the coefficient of kinetic friction?

80. Physics-Mechaincs

A 1.3 kg mass accelerates at 5.8 m/s2 in a direction 36◦ north of east. One of the two forces acting on the mass has a magnitude of 17.3 N and is directed north. Determine the magnitude of the second force. Answer in units of N.

81. chemistry

Use the concepts of effective nuclear charge, shielding, and n value of the valence orbital to explain the trend in atomic radius as you move across a period in the periodic table.

82. CHEM

Calculate the mass of nitrogen dissolved at room temperature in an 80L home aquarium. Assume total pressure of 1 atm and mole fraction of .78 for nitrogen

83. Physics

A jetliner can fly 6.50 hours on a full load of fuel. Without any wind it flies at a speed of 2.15 102 m/s. The plane is to make a round-trip by heading due west for a certain distance, turning around, and then heading due east for the return trip. During

84. chemistry

Calculate the empirical formula for each of the following natural flavors based on their elemental mass percent composition. vanillin (responsible for the taste and smell of vanilla): C 63.15% H 5.30% O 31.55%.

85. Physics

Block A of mass 4.0 kg is on a horizontal, frictionless tabletop and is placed against a spring of negligible mass and spring constant 650 N m. The other end of the spring is attached to a wall. The block is pushed toward the wall until the spring has been

Translate the following sentence into a mathematical equation: "The area, A, of a circle is the product of the number pi and the square of the radius, r." A=pi X r^2 Is this correct?

87. statistics

In a box of thirty AAA batteries, there are three defective batteries. Two batteries are randomly selected and tested. What is the probability that both are defective, if the first one is not replaced after being tested?

88. world cultural geography

what is christain political and social organization?

89. physics

a 9.0 g ice cube at -10 C is put into a thermos flask containing 100 cm^3 of water at 20 C. by how much has the entropy of the cube-water system changed when the equilibrium is reached? the specific heat of ice is 2220 J/kg K.

90. Sta

A regular feature in a newspaper asks readers to respond via e-mail to a survey that requires a yes or no response. In the following day's newspaper, the percentage of yes and no responses are reported. discuss why we should ignore these statistics.

91. Statisitcs

The operations manager of a large plant with four departments wants to estimate the person-hours lost per month due to accidents. describe a sampling plan that would be suitable for estimating the plantwide loss and for comparing departments.

92. math

There are 18 students standing in a circle, evenly spaced and consecutively numbered. Which student is directly opposite student 1

93. chemistry

Calculate the empirical formula for each of the following natural flavors based on their elemental mass percent composition. nitroglycerin (used medically as a vasodilator to treat heart conditions): C 15.87% H 2.22% N 18.50% O 63.41%. Express your answer

94. physics

You have designed a rocket to be used to sample the local atmosphere for pollution. It is fired vertically with a constant upward acceleration of 19 m/s2. After 23 s, the engine shuts off and the rocket continues rising (in freefall) for a while. (Neglect

95. chem

What is the percent composition of carbon in sodium carbonate (Na2CO3) Na2CO3 = 12/106 x 100 = 11.32% is this correct?

96. geometry

i need help with this geometry prblem my math book is online on this site: w w w . k e y m a t h . com / D G 3 the class passcode is: 1574-4c524 The chapter is 0 Lesson 0.2 pg. 9 problem number 6 REMEMBER 4-FOLD SYMMENTRY IS NEEDED !!! URGENT !!!

97. physics

A red train traveling at 72 km/h and a green train traveling at 144 km/h are headed toward each other along a straight, level track. When they are 720 m apart, each engineer sees the other's train and applies the brakes. The brakes slow each train at the

98. EP high

A 0.6 kg rock is projected from the edge of the top of a building with an initial velocity of 11.1 m/s at an angle 51◦ above the horizontal. Due to gravity, the rock strikes the ground at a horizontal distance of 18.7 m from the base of the building.

99. physics

While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north, 290 m east, 180 m at an angle 30.0° north of east, and 150 m south. Find the resultant displacement from the cave entrance.

100. chemistry

2 NO2(g) N2(g) + 2 O2(g) The ΔH° for the reaction above is -66.4 kJ. The system is initially at equilibrium. What happens if N2 is added to the reaction mixture at constant temperature and volume? The reaction absorbs energy. The reaction releases

101. chemistry

2C2H6(g) + 7O2(g) > 4CO2(g) + 6H2O(g) KCl(s) > K(s) + Cl2(g) is this balanced?

102. Physics

A point (labelled P in the figure) is attached to the rim of a disk of radius 0.2 m, which can turn around an axis through its center. It is rotating counterclockwise with a speed of 2.5 m/s. Can someone please step me through the problem step by step?

103. Chemistry

H2(g) + I2(g) 2 HI(g) The forward reaction above is exothermic. At equilibrium, what happens if I2 is removed from the reaction mixture at constant temperature and volume? The reaction absorbs energy. The reaction releases energy. [H2] increases. [H2]

104. Chemistry

Could someone please help me with these two questions. I am having trouble. 1. What is the molarity of a solution if 48.0 mL of a 0.220 M solution is required to neutralize a 25.0-mL sample of the solution? 2. The mixing of which pair of reactants will

105. Economics

Pick one MARKET in which the price system does not produce an equitable price and quantity of output.

106. physics

An inquisitive physics student, wishing to combine pleasure with scientific inquiry, rides on a rollercoaster sitting on a bathroom scale. (Do not try this yourself on a rollercoaster that forbids loose heavy packages.) The bottom of the seat in the

107. Economics

Suppose the total output curve increases at an increasing rate for workers 1 to 50, increases at a decreasing rate from workers 51 to 101, and decreases beyond 101 workers. You would know that Choose one answer. a. marginal product is increasing from

108. Calculus

Find the functions a) f o g, b) g o f, c) f o f, d) g o g, and their domains. f(x)= square root of x, g(x)= cube root of 1-x These are my answers, but I am not sure about them and I only figured out one domain... that is the part that really confuses me.

109. physics

Assuming biological substances are 90% water and the density of water is 1000 kg/meter cubed, estimate the mass of a fly, which can be approximated by a cylinder 4 mm long and 2 mm in diameter (volume (length*pi*radius squared) the answer is 1.131 X10 to

110. Physics

Two cars start from the same place at the same time. After two hours, one car has traveled 30% farther than the other. If one car's speed is 20mph larger than the other car's speed, what are the speeds of the cars? Solve algebraically

111. science

5a 30 kg girl and a 25 kg boy face each other on friction -free roller blades . the girl pushes the boy ,who moves away at a speed of 1.0 m/s . the girls speed is how many m/s /

112. chemistry

What mass of copper(II) nitrate would be produced from the complete reaction of 25.1 g of copper, according to the chemical reaction shown below? Cu + 2 AgNO3 ----> Cu(NO3)2 + 2 Ag i got 74.08 is that correct?

113. chemistry

for an oxygen atom,wich requeres more energy,the addition of two electrons or the removal of one electron?explain why

114. Math Word Problem

In an NFL football game, the Bears scored a total of 41 poionts, including one safety (2 points) and two field goals (3 points each). After scoring a touchdown (6 points), a team is given the chance to score 1 or 2 extra points. The Bears, in trying to

115. Physics

If you're dragging a 75kg log along the ground at constant velocity and you have to pull on it with a horizontal force of 250 N, what is the resistive force exerted by the ground??

116. Organizational Behavior

Questions 1. Research conducted by Luthans supports the belief that promotions are base on performance. True or false 2. Tenure is negatively related to turnover. True or False. 3. Age and avoidable absences are negatively related. True or False. 4. Which

117. math

i am a number in the fourth row on the hundred chart. my ones digit is twice my tens digit. what number am i;

118. physics

A tennis player standing 11.5 m from the net hits the ball at 2.60° above the horizontal. To clear the net, the ball must rise at least 0.252 m. If the ball just clears the net at the apex of its trajectory, how fast was the ball moving when it left the

119. math

i need help with this geometry prblem my math book is online on this site: w w w . k e y m a t h . com / D G 3 the class passcode is: 1574-4c524 The chapter is 0 Lesson 0.2 pg. 9 problem number 6 URGENT !!!

120. physics

SOMEBODY ANSWER THIS PLEASE, Two people pull as hard as they can on ropes attached to a 170 kg boat. If they pull in the same direction, the boat has an acceleration of 1.59 m/s2 to the right. If they pull in opposite directions, the boat has an

169. English

I selected 5 sentences as promised. I really hope the others were correct! Sentence number 6 refers to the Italian grading system which I don't know how to express in English. 1) During the break I go out in the courtyard.We aren't allowed to smoke or run

170. geometry

What is the pattern to 1,3,6,10,15,...? the answer would be really appreciated :D

171. English: Puritans

The question is: Why could Winthrop's ideal not be achieved? The paragraph where I have to find the answer: Winthrop describes an ideal society, which, if the Puritans had been able to achieve it, would have been a reasonable facsimile of paradise on

172. statistics

c. Compare the two sets and describe what you discover. The following data sets shows the ages of the first seven presidents (President Washington through President Jackson) and the seven most recent presidents including President Obama. Age is given at

173. Chemistry

If a person has a mass of 62 kg, how many pounds of water does she have in her body? And it gives the typical adult body containing 51% water

174. physics

How do we tell if an object is in free fall?

175. COM156

Identify three challenges that may arise when writing a paper. Explain the strategies you will use to overcome those challenges.

176. global

Can someone please help ,still can not find out the following In the book iooi Arabian Nights...Thievery as a way of life, humor through trickery of the innocent and distrust of foreigners. I was told to look at Ali Baba but still don't see the answer

177. English

Why is it important to discuss the author of a book and the background of the author to students?

the line with the equation x+y=3 is graphed on the same xy-plane as the parabola with vertex (0,0) and focus (0,3). What is the point of intersection of the two graphs?

179. History

What were the causes of the Great War of Empire and why is it called that?

180. physics

The current-density magnitude in a certain cicular wire is J= (2.75*10^10A/m^4)r^, where r is the radial distance out to the wire 's radius of 3.00 mm. The potential applied to the wire is 60.0 V. how much energy is converted to thermal enery in 2 hours?

181. Physics

A solar still is used to make fresh water from salt water by evaporation. Assume that during a summer day that 1000 BTU/ft sq of solar energy falls on the surface of the salt water. Determine how many inches of water are evaporated in 30 days. Assume that

182. chemistry

if you start with 1.25g of Cu, calculate the amount that will precipitate

183. physics

In the ideal case of zero resistance, a ball rolling on a level surface will accelerate

184. math

Jane’s car travels 224 mi on 12 gal of gas. Rounded to the nearest mile per gallon, how many miles to the gallon does her car get?

185. math

Write each of the following square roots in the form a√b, where a and b are integers, b > 0, and b has the least value possible: a) √180 b) √363 c) √252

186. math

Convert each of the following repeating decimals to a/b form, where a, b are integers and b ≠ 0. #2a ¯ 0.4 #2c ¯ 1.396 #2e ¯ -2.34

187. Math 117

Give exact and approximate solutions to three decimal places. (x-8)^2=49 I need step by step example on how to solve this AND input it into a calculator. Please!

188. math

which number is closer to zero, -4/5 or 5/4 please explain

189. physics

A ball is thrown upward from the ground with an initial speed of 26.2 m/s; at the same instant a ball is dropped from rest from a building 14 m high. After how long will the balls be at the same height?

190. Phsyics

Two cars start from the same place at the same time. After two hours, one car has traveled 30% farther than the other. If one car's speed is 20mph larger than the other car's speed, what are the speeds of the cars? Solve algebraically.

191. Precalculus/Algebra 3

If P(x)= -4x^3+5x-1, use synthetic substitution to find each of the following. 2. P(1/3) 3. P(i)

192. English

6) We have afternoon classes on Tuesdays from 2pm to 4pm. 7) I prefer scientific subjects such as physics and maths to humanities. 8) We are tested orally twice a term and we get three written marks each term (is there a better way of expressing it??). 9)

193. Chemistry

Classify the following reaction using 2 different classifications. 3Sr(OH)2+2Fe(NO3)3=3Sr(NO3)2+2Fe(OH)3

194. Calc

An airplane is flying at a speed of 350 mi/h at an altitude of one mile and passes directly over a radar station at time t=0. a) Express the horizontal distance d (in miles) that the plane has flown as a function of t. I really don't know... would it be

195. statistics

Intrinsic - 5.5, 5.5, 5.2, 5.3, 4.7, 5.5, 5.2, 5.3, 4.7, 5.4, 6.2, 5.2, 5.3, 4.7, 5.4, 6.2, 5.2, 5.5, 5.2, 5.3, 4.7, 5.4, 6.2, 5.2, 5.6 Extrinsic6.8, 5.5, 4.6, 5.7,5.6, 5.5, 4.6, 5.7, 5.6, 5.6, 5.5, 4.6, 5.7, 5.6, 5.6, 5.5, 4.6, 5.5, 4.6, 5.7 5.6, 5.6,

196. Chemistry

What is the equation of iron reacting with iron(|||) ions to form iron(||) ions?

197. algebra

simplify 4(3x-(3-5y+7x)+3y

198. Physics

How would I approach this problem? What formula would I use to answer each part? Thank you in advance for any guidance... As part of the launch of the space shuttle, solid-rocket boosters (SRBs) first take it to an altitude of 45.0 km while they accelerate

199. physics

Resolve a displacement of 700 cm into two components along direction lines that lie on opposite sides of the displacement and each of which makes an angle of 30° with the displacement.

200. German

This was a worksheet and the instruction said to fill in the adjective endings, since the underlines wouldn’t show I put the spaces to be filled as parenthesis. The (-) means I think it does not need an ending and the (?) means im confused and not sure

202. Biology

Why is the maximum resolution and magnification of a light microscope less than the electron microscope?

203. math

determine whether the graphs of the two lines are parallel y+7=7x , 7x-y=7

204. math

solve the equation 9(x-4)+x=10(x-4)+4

205. physics

32 kg box sitting on a ramp has a coefficent of 0.21. If the ramp is raised, at what angle will the box begin slipping?

206. 8th grade math

simplify: 3 to fourth power minus square root of sixty-four divide (10-12 squared)

208. college physicalscience

the air speed of a plain is 223km/h and the pilot keeps the plane pointed north. A wind is blowing73.6km/h from the west. Determine the speed (in km/h) of the plane relative to the ground

209. Pyshics

A car is travling forward at 75km/h. How far does the caar tavel in 25 s?

210. chemistry

what happens when you cool biodiesel. petroleum-based diesel fuel, and vegetable oil?

211. chemistry

how does kinetic molecular theory help us to explain boyle's law?

212. Microscopes

What is the resolving power for light microscopes, and what is it for electron microscopes?

213. Chemistry

Find the volume in liters of 0.452 M manganese(II) sulfate that contains 54.5 g of solute?

214. physics

A deep mountain valley is separated by two vertical cliffs. One cliff is 600 meters high and the other is 400 meters high. A cable car runs from the foot of each cliff to the top of the other cliff. At what height above the ground do the two cable cars

215. Chemistry

Can anyone answer this question please. (Determine the concentration of an aqueous NaCl solution if 31.5 mL are required to reach the equivalence point when titrated with 25.0 mL of 0.20 M AgNO3.)

216. Physics

Two cars travel at the same constant speed. The first car travels for 10 minutes, the second for 27 minutes. If the second car travels 18 miles farther that the first, how far does each car travel?

217. Calculus

Express the function in the form f o g. G(x)= The cube root of (x/1+x) So, (f 0 g)(x)= f(g(x))= f(cube root of x/1+x)= I don't know how to finish the problem because it does not give you the information for F(x)???

218. chemistry

how many grams of hydrogen are produced when 1gram of aluminum is reacted?

219. Physics

Three Coulombs of charge flow through a wire in 150 ms. If the current ceases to flow (goes to zero Amps) for the following 850 ms, what is the average current over this one-second period?

220. calculus

f(x)=kx^2+3 a) if the tangent lines to the graph of f at (t,f(t)) and (-t, f(-t)) are perpendicular, find t in terms of k b) Find the coordinate of the point of intersection of the tangent lines mentioned in part (a) in terms of k

221. maths

find the 8th derivative ofe^2x*sin2x?

222. english

Although Ashley does not know whether she is doing a right choice in helping Mr. Roby, I believe that she does make a good decision in contacting other doctors and nurses

223. math

i am a number in the fourth row on the hundred chart. my ones digit is twice my tens digit. what number am i;

224. English

I forgot to include the following sentences when describing the school day. As I couldn't send you my previous post, I typed "Jane" (to see if something changed.) Can you please check them please? 1) We have lessons (or we go to school) from Mondays to

At a preview of a movie,6 people out of 500 walk out. suppose that 600,000 people see the movie. estimate the number of people who walk out

226. physics

A model rocket is propelled upward by a cylinder of compressed water. The cylinder emits water at a rate of 0.050 kg/second with an exit speed of 80.0 m/s. Initially, the rocket has a mass of 0.15 kg, including the water cylinder. What is the rocket's

How do I create a calendar with expressions using letters a,b,c, and d (1,2,3,4). Each expression needs to equal each day on the calendar.

228. English

I forgot to include the following sentences which belong to the same summary. Thank you. 1) While building up the personality of Kurtz for his listeners, Marlow exposes the discrepancy between the Europeans’ words and their actions. 2) At the beginning

229. world cultural geo.

what does it mean when the question asks "how are christians relationships to famaily"? and education?

230. algebra

pliis the equivalent form indicated for each of the following fractions 7/9=?/45 and 11/5=?/35 pliis help meee

231. college

A car accelerates at a rate of 0.6 m/s2. How long does it take for this car to go from a speed of 55 mi/h to 60 mi/h?

232. 8th grade math

How do I create a calendar with expressions using letters a,b,c, and d (1,2,3,4). Each expression needs to equal each day on the calendar.

Find the real solutions of the equation: 14x^2 - 5x^2 - 1 = 0 I know that you have to use au^2 + bu +c = 0 so u^2 - 5x -1 which is prime. So would the answer be that the solution is the empty set?

234. history

I've decided to do my american history paper on consumer culture but i need to narrow it down to a specific time period and develop a thesis- is there a good thesis anyone can think of

235. math

solve the given equation for x x-2/4+x+3/5=5/4

236. math

The theater group performed on Friday and Saturday night. Three hundred and twenty four attended on Friday, and 33 more attended on Saturday. How many people saw the show?

237. Geography

what industry provide the bulk of trade in canada? Thank you!

238. Statistics

The average mpg usage for a 2004 Ford Expedition 2WD for a sample of 10 tanks of gas was 17.0with a standard deviation of 0.8. For a Ford Explorer 2WD, the average mpg usage for a sample of 10 tanks of gas was 18.5 with a standard deviation of 1.0. (a)

239. A&P

___________are usually attached to rough endoplasmic reticulum and produce enzymes and other protein componds.

240. Pre-Calculus

Three numbers whose sum is 15 are in an arithmetic progression. The product of the 1st two numbers is 2 more than the 3rd. Find the three numbers.

241. math

media service charges $30 for a phone and$20 month for its economy plan. find a model that determines the total cost,C(t) of operating a media services phone for 1 months C(t)= use the model to find the total cost for 3 months of service total cost=

242. Chemistry

If a person has a mass of 62 kg, how many pounds of water does she have in her body?

243. social studies

There house will possibly go from democrate to republican. Will this impede progress or make for more progress in the government? What will the influence the tax reform bill?

244. Englisth

Three common adjuective endings

245. science

_____ contain a fuel, rods to control nuclear reactions, and a cooling system. Would Nuclear reactor work??

246. English III

What does Miss Hannigan say shw will do to Anny and Sandy in the movie Annie? I looked it up and still can't find the answer.

247. MARH

Do students at various universities differ in how sociable they are? Twenty-five students were randomly selected from each of three universities in a region and were asked to report on the amount of time they spent socializing each day with other students.

asked by Anonymous 1

281. English

I need help bad, what exactly am I suppose to write about with this question. I just need to know what this question is asking. Here is the question: “Locate two books or internet sources on the career of Edgar Allen Poe. On the basis of information you

282. calc

Consider the function f(x)= x^2+a if x1 a. determine the value(s) of a that will make f(x) continuous at x=0 b. determine the value or values of a that will make f(x) continuous at x=1

283. chemistry

When brought to the surface of the moon, will a mass have more or less weight than it did on the surrface of the earth, or will it be the same weight? explain

284. math help plz

You receive 80% on your first midterm while your friend receives 70%. Taking into consideration the fact that the first midterm is worth 14% of your overall mark, the difference (between receiving 70% and 80% on your midterm) this could make in your final

285. math

graph the following function g(x)=|x+5|

286. math

I need help with integer expression (3z)exponent2-10

asked by erika 7th
287. writing

In APA formate do I have to do (para. 11) or should it be (Para. 11)

288. Physics

A ball thrown into the air lands 38 m away 2.4 s later. Find the direction and magnitude of the initial velocity.

289. Microscopes

What is the RESOLVING POWER of a electron and light microscope?

290. algebra

solve for the variable in the equation 3(-2 - 3x) = -9x - 4

291. English

In what ways do APA format and style make academic communication hard?

292. criminal justice

how are ethics and morals related to one another?

293. ecology

What qualities make a great living environment for the isopod ?

294. Math 117

Find the vertex, line of symmetry, and the max/min value of f(x). Graph the function. f(x)=-3(x+1)^2+3

295. chem

is NaCl ion dipole, or Ion Ion? my notes say ion ion but online it says ion dipole. Is NaOH2 hydrogen bond or Ion-Dipole? my class notes say ion dipole but it seems, to me, to be h-bond too.

296. Math 117

Find and label the vertex and the line of symmetry. Graph the function. f(x)=1/3x^2

297. criminal justice

i need someones opinion on this question please. The American criminal justice system is a good one, but far from perfect. Innocent people have gone to prison and guilty ones gone free. How much of the out come of a trial has to do the ethics of the

298. math

Explain an error problem in each of the following: a) 13/35=1/5, 27/73 = 2/3, 16/64 = 1/4 b) 4/5+2/3=6/8, 2/5+3/4=5/9, 7/8+1/3=8/11 c) 8 3/8-6 1/4=2 2/4, 5 3/8-2 2/3=3 1/5, 2 2/7-1 1/3=1 1/4 d) 2/3*3=6/9, 1/4*6=6/24, 4/5*2=8/10

299. Hospitality

I need to provide an organization chart for a lodging facility, example hotel/resort. I have never worked in a hotel before. Can someone recommend a website for the hilton or some other popular lodging facility organizational chart?

300. social studies

There house will possibly go from democrate to republican. Will this impede progress or make for more progress in the government? What will the influence the tax reform bill?

301. math

how do you write in word form 204,500,040.

Describe the effects of circumstance on character.(include such thing as education, family,race,economic status, social status, clutural background and geographical location).From the story Young Goodman Brown And A&p

303. applied maths

a force 'P' acts on a bodyat an angle theta to a horizontal line 'OX'. P,together with a pull of 1.5kn at 30degrees to, and below 'OX', has the same effect as a force of 5kn at 45degrees to and above 'OX'. i'm so confused!

304. social studies

Their house will possibly go from democrate to republican. Will this impede progress or make for more progress in the government? What will influence the tax reform bill? i want both republican and demorcatic view

305. Chemistry

Can someone explain the difference between oxidation and reduction? ALso reducing agent and oxidizing agent?

asked by Natalie Brooks
306. Assembly Language

Hello, i am new at assembly language and i just got started with this stuff. I have this assignment which doesn't make any sense to me. Can someone please help? I am using Kip Irvine's, Assembly Language for x86 Processors, 6th edition. These are the

307. Precalculus

How do you determine graphically any local and absolute extrema. f(x)=x2+2x-15

asked by Amber Hill
308. chemistry

is heat matter

309. 9th grade-Social Studies

I am doing a reconstruction project and need specific information about THe Black Codes. What is this or what were these? Who did or did not benefit from it? Thank you

310. Music

I'm learning about Asian music and i have 7 terms, and i have to group them into either folk, classical or popular. The 7 terms are khaen, tai thu, metallophone, piphat, ramayana, Lam sing, and gamelan. Which terms fall into each of the 3 groups. Any help

311. math

find the rate of change thousand dollars month, the rate of change is

simplify the following fractions by rewriting them in factored form and finding all the "ones" you can....plis help.. 42/60, 16/80, 51/17, 7/33...

313. government

where would I go to find out about campaign ads for a government project? I am stuck

314. algebra 1

simplify the following fractions by rewriting them in factored form and finding all the "ones" you can....plis help.. 42/60, 16/80, 51/17, 7/33...

315. college physics

A 32 kg box sitting on a ramp has a coefficent of 0.21. If the ramp is raised, at what angle will the box begin slipping?

316. math

List three real-world situations that involve ratio and proportion.

317. Chemistry

Why is it better to use titration rather than just diluting something in some circumstances?

After more than 10 years of proposals, revisions, and re-revisions, the National Conference of Commissioners on Uniform State Laws (NCCUSL) at long last voted to adopt the Uniform Computer Information Transactions Act (UCITA) on July 29. Like its better

319. English

Is this thesis statement too long for a four page essay? Also, are there any major grammatical errors? Although a cursory glance at Odysseus on his long journey home may lead to a conclusion that he is motivated by an overwhelming desire to see his wife

320. math

Explain an error problem in each of the following: c) 8 3/8-6 1/4=2 2/4, 5 3/8-2 2/3=3 1/5, 2 2/7-1 1/3=1 1/4

321. Music

I'm learning about Asian music and i have 7 terms, and i have to group them into either folk, classical or popular. The 7 terms are khaen, tai thu, metallophone, piphat, ramayana, Lam sing, and gamelan. Which terms fall into each of the 3 groups. Any help

322. English

How do illustrations in books impact our understanding of the characters?

323. Science

In metric measurements, what is the meaning of the abbreviations: Dg, Dm and Hm? Why are the first letters written as capitals?

324. English

What three questions does an adjective answer

325. math

i am not sure how to to this problem.... X(X+10^-3/4 - (x+1)^1/4 / x^2 the -3/4 and 1/4 are fractions and exponents

326. math

101001001001 - 276328769862 = ?

327. Math

Could someone please check my work on these word problems? My solutions just don't seem right, could you please let me know where I may have messed up. Many people know that the weight of an object varies on different planets, but did you know that the

the line with the equation x+y=3 is graphed on the same xy-plane as the parabola with vertex (0,0) and focus (0,3). What is the point of intersection of the two graphs?

329. Chemistry

How can beta radiation be stopped by a piece of aluminum foil?

330. chemistry

what frequency of radiation in Hz is required to ionise helium?

331. Math

unknown number for 1/6h=9

332. calculus

Fond the limit of lim x -> 3 [1/(x+4)] - (1/4) _________________ x

333. Physics

A nuclear power plant generates (output) 500 mw. It is 34% efficient. The waste heat going in the Connecticut River with an average flow of 3*10 exp 4 (kg/sec). How much does the water temperature rise?

334. Ms. Sue please check my answer

People don't buy from local merchants Local people don't have jobs Prices may be higher People aren't self-sufficient What other disadvantages have you thought of? # geography (grade 6) - Ryan, Sunday, September 19, 2010 at 9:55pm interest rate goes up and

335. algebra

how do you solve f(f(9)) = 4x+6

336. chem

is NaCl ion dipole, or Ion Ion? my notes say ion ion but online it says ion dipole. Is NaOH2 hydrogen bond or Ion-Dipole? my class notes say ion dipole but it seems, to me, to be h-bond too.

337. uop

A firm utilizing FIFO inventory accounting would, in calculating gross profits, assume that

30,000,000,000x6

339. math

solve the given equation for x x-2/4+x+3/5=5/4

340. math

find the domain p(x)=x^2+1

341. Business Research for Decision Making

1. Decide on the type of tool or instrument you think would be effective given your topic on if there is no relationship between customer relationship and customer loyalty, explain why this type of tool would be optimal, and point to research which has

342. science

How many people lived on the north american continent before european settlement?

343. math

Use The Graph To Find The Following A.f(3) B. The Domain, C Any X-values For Which F(x)=2. D. The Range?

Find the real solutions of each equation. x=2 srqt 6x-36 I do not know where to start.

345. criminal justice

how do defense attorneys deal with the moral dilemma of representing people they know are guilty?

346. Precalculus/Algebra 3

One root of 3x^3-5x^2+2= 0 is 2. Find the remaining roots

347. Math

what is the equation of pi?

348. Math

Hello everybody

349. English

Thank you for your last corrections! Can you please check the following summary I prepared on the theme of colonialism in Conrad's "Heart of Darkness"? 1) Conrad presents colonialism not only as a political and an economical enterprise but also as a

350. college UOP

WHAT ARE YOUR VIEWS WITH DIVIDING ATTENTION AMONG A GROUP

351. health

You have been appointed by the state you live in to get health care organizations to build systems to share information to improve health care services. Name a way you could encourage organizations to join your effort. What advantages would you present?

352. math

3/7-6/7,1/7,-1/2,2/7

353. math

1/3+(-5/6)+-1/2=

354. English

Can you please check these sentences grammatically? Thank you very much 1) Kurtz was torn between his desire to bring the light of white civilization to Africa and his boundless will-to-power and inordinate pride. 2) In the end, however, Kurtz had the

355. math

determine if a graph is a function

356. Biology

In which of the following environments would you be most likely to find non-vascular plants: in desert soil, near the snow line on a mountain, on a sandy ocean beach, or on the forest floor? Give reasons for your answer.

357. college physics

What is the cross product a x b of the two vectors a = 64.00 m directed due east and b = 32.00 m directed 30° north of east?

358. algebra 2

simplify the square root of 18 m to the 9th power

359. math

if doctor orders 2mg dilaudid and 2.5mg morphine is equal to 0.4mg dilaudid how many mg of morphine would you give?

360. arithmetic

5(y-x)+z i need help

asked by erika 7th
361. Math

Factor 3y^2z-5yz-9y^2+30y-25 I can't seem to figure this one out... Give me a step by step answer please and thank you :)