# Questions Asked onMarch 19, 2011

1. ## calculus

find an equation of the curve that satisfies dy/dx=4x^3y and whose y-intercept is 7

2. ## computer science

9.16 Consider a system that uses pure demand paging. a. When a process first starts execution, how would you characterize the page fault rate? b. Once the working set for a process is loaded into memory, how would you characterize the page fault rate? c.

3. ## Psychology

Which one of the following statements about the gate-control theory is true? Pain impulses create a gate leading to the brain. The brain is capable of generating pain on its own. The gate closes when pain messages go to the brain. Damage to small nerve

4. ## English

just can't figure these sentences out. have to rewrite these sentences, correcting the problem of incorrect omission.? 1. A liberal arts background is excellent for such professions as lawyers and doctors. 2. American colleges consistently produce more

5. ## Physics

In the figure, a chain consisting of five links, each of mass 0.100 kg, is lifted vertically with constant acceleration of magnitude a = 2.50 m/s2. Find the magnitudes of (a) the force on link 1 from link 2, (b) the force on link 2 from link 3, (c) the

6. ## Chemistry

How many grams of SO2 can be produced from 100g of S and excess O2

7. ## math/ geometry.

the vertex angle of an isoceles triangle is 120. the base length is 18. what is the length of the altitude to the base in simplest form

8. ## algebra

13x+11y=70 11x+13y=74

9. ## physics

A rectangular container measuring 24 cm 48 cm 55 cm is filled with water. What is the mass of this volume of water in kilograms?

10. ## science

Describe one region of the world where this hypothetical isotherm pattern is actually observed.

11. ## mete

Three point charges lie along a circle of radius r at angles of 30°, 150°, and 270° as shown in the figure below. Find a symbolic expression for the resultant electric field at the center of the circle.

12. ## math

1)Find the sum of the first eight terms of the Geometric progression 256,128,64,32 2)How many terms should be taken from the Geometric progression 4,12,36 for the sum to be 2188

13. ## Calculus

Luke and Leia are trapped inside a trash compactor on the Death Star. The side walls are moving apart at 0.1 m/sec, but the end walls are moving together at 0.3 m/sec. The volume of liquid inside the compactor is 20 cubic meters, a constant. Write an

52. ## separation of variables

find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3

53. ## calculus

if dy/dx=ycos x and y=3 when x=0, then y= ?

54. ## calculus

if f'(x)=2f(x) and f(2)=1, then f(x)= ?

55. ## Math

1. the mystery shape has fawer than 3 lines of symmetry. 2. it has at least 1 pair of perpendicular sides. 3. it has at least 1 pair of parallel sides. 4. it has less than 1 obtuse angle.

56. ## math

motorcycle race 1 lape=750m. at the start gina sets off 4 sec. after tom but drives the motorcycle 3.5m/s fasteran finishes in 2.5sec. sooner then tom. at what speed was gina driving?

57. ## algebra

Lisa studies 8 hrs. for a particular test and gets a score of 78. at this rate how many hours would she have to study to get a score of 98?

58. ## Geography

Which river might be used to transport materials mined near Irkutsk to manufacturing centers?

59. ## Geography

Does Russia grow sugar beets or Ukraine?

60. ## english

im studying for test and I am supposed to write about "what are gender roles, how do they effect,, influence, inform our conceptions of masculinity and feiminity. I especially don't get the femininty and masculinity part. Thanks and I appreciate ur help!

61. ## management

What factors account for the resurgence of interest in OSCM today?

62. ## Algebra

Write 27/4 as a mixed number, I keep getting 6.75 but it does not seem correct, please confirm if it correct or if I am missing something.

63. ## chemistry

Abstract 4 chemistry of starch

64. ## math

integral of inverse root(8x+x^2)

65. ## politics

Which president closed the tunnel between his country and palestine? The tunnel was a secret passage way in which the palestinies got food and other helpful sources.

66. ## calculus

The USPS will not mail a package if the sum of its length and its girth (measuring around the package) exceed 108 inches. Determine: (a) The volume of the package as a function of its radius r. (b) For which radius r is the volume of the package a maximum?

67. ## Algebra

Hello. I am trying to solve quadratic functions but I'm having difficulty understanding. Here is my work so far... y=3x^2 + 12x + 9 12/6 = -2 = y 3(-2)^2 + 12(-2) + 9 = -3 x=0 y=9 (0,9) Would I just plug in 1 and 2 for x and then reflect it while i'm

68. ## Math

how does sin^2x-cos^2x =1 could someone explain or write down steps on how the left side becomes 1?

69. ## Algebra

Round 47,973 to the nearest 100 I keep thinking that it's 48,000, but I have no idea how to prove it

70. ## physics

Three point charges lie along a circle of radius r at angles of 30°, 150°, and 270° as shown in the figure below. Find a symbolic expression for the resultant electric field at the center of the circle.

71. ## Physics

A uniform board 12 ft long weighs 10 lbs. Two feet from the left is centered a 3 lbs. structure. How far from the left end is the balance point i.e. the point at which if you applied 13 lbs. upward force would balance the board and structure??

72. ## Physics

Please heeelp!!! A 65.0 kg diver is 2.10 m above the water, falling at speed of 6.70 m/s. Calculate her kinetic energy as she hits the water. (Neglect air friction)

73. ## English

I'm also noticing that theres some sort of problem with this paragraph but I...I don't know. Like im nots sure if its the right example and if it links to intolerance. The only figurative device that is completely and effectively used in this text is first

74. ## Math

the original problem was: (sin x + cos x)^2 + (sin x - cos x)^2 = 2 steps too please I got 1 for (sin x + cos x)^2 but then what does (sin x - cos x)^2 become since it's minus?

75. ## math

a=c divided by7 b=a multiple of 5 less than 20 c= b divided by 6 d= a x c a = b= c= d=

76. ## social studies

aword that describe an area that has one or feaures in common

77. ## chemistry

ok this problem has made me crazy , 15 % is w\v ok , so i just the m1 , the mass of naoh i don't need the volume , so ill reformulate the problem again , I need the mass of naoh with conc.15% w/v in 176 g h2so4 ok

78. ## physics

two equal mass cars collide head to tail and their bumpers lock. One car has a velocity of 10m/s and the other is at rest. what is the velocity of the two cars after the collision?

79. ## physics

two equal mass cars collide head to tail and their bumpers lock. One car has a velocity of 10m/s and the other is at rest. what is the velocity of the two cars after the collision?

80. ## DNA + Genetics

During the menstrual cycle, the ovarian steroid hormones estrogen and progesterone control a dramatic transcriptional reprogramming of endometrial stromal cells (ESCs) leading to a receptive state for blastocyst implantation and the establishment of

81. ## Physics

A ball starts from rest down a smooth (frictionless) 45 degree inclined plane 10 m above the floor. How fast will it be going when it reaches the floor?

82. ## science

lena carried out an investigation to find the energy content in bacon rind she lit the bacon rind with a bunsen burner and held it beneath a test tube of water she stirred the water and recorded it temperature! why did lena stir before recording the

83. ## MUSIC

How was the life style of buddy bolden and some ups and downs?describe some interesting things about the life of jelly roll morton?

84. ## Chemistry

I have two questions: 1. A sample of 10.7 g of CO reacts completely with O2 to form CO2. How many grams of CO2 will be formed? 2. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2 g of ammonia are reacted with

85. ## chemistry

What is the molar concentration of calcium hydroxide that has 0.185g solute in 100ml solution?

86. ## separation of variables

how do you separate these variables dy/dx=1/y^2, y(0)=4

87. ## Physics

Two sounds have measured intensities of I1 = 100 W/m2 and I2 = 300 W/m2. By how many decibels is the level of sound 1 lower than that of sound 2?

88. ## chemistry

Concentrated nitric acid is 16M. What volume of nitric acid must be diluted must with distilled water to prepare 5L of 0.1M nitric acid?

89. ## chemistry

Concentrated HCI is 12M. What is the moloarity of an HCI solution prepared by diluting 10ml concentrated HCI

90. ## Calculus

ok so apparently there's no way to express integral |f(x)|dx in standard mathematical functions... which I don't exactly buy... but ya the issue came up when I was trying to evaluate integral |x - 2|dx and apparently this is correct integral |x-2|dx = 2 -

91. ## CHEMISTRY

Concentrated HCI is 12M. What is the molarity of an HCI solution prepared by diluting 10ml concentrated HCI to a total volume of 250ml?

92. ## Math

Sandy is making curtains from fabric that is 44 inches wide. Her curtain pattern is 27 inches long and 44 inches wide. How many yards of fabric will she need to make 5 curtains?

93. ## Math

Divide and multiply. 1) -2 4/11(-2) 2) 5 1/7 / 4 1/8

94. ## algebra

I am confused with this. f(x) 1/4(x+9)^2+3 vertex, symmetry, and max. min. help please.

95. ## Math

The Vashi family has a 20-gallon aquarium that is only 3/4 full. The family uses a 2-quart pitcher to add water to the aquarium. How many times will the Vashis have to fill and empty the pitcher to completely refill the aquarium?

96. ## english

Write 9 sentences about the role of education in successful financial planning, in which you correctly use a different verb tense in each sentence. im so confused

97. ## Spanish

The following paragraph describes what some may consider to be a typical North American tourist. It reflects one opinion only. North Americans whovisit foreign countries do not commonly fit this description. Read the paragraph. Then write your answersin

98. ## math

If two cars leave at the same time and are traveling in opposite directions, one car at 50 and the other at 55. How far away from each other will they be after 1 hours?

99. ## Chemistry

How many grams of water vapor (H2O) are in a 10.2 liter sample at 0.98 atmospheres and 26°C? Show all work used to solve this problem.

100. ## Sacramento city college

When a vacuum is pulled on the water with a 29.4 in.Hg,What is vapor created for each pound of water removed in cubic feet?

101. ## chem

What is the molarity of ZnCl2(aq) that forms when 15.4 g of zinc completely reacts with CuCl2(aq) according to the following reaction? (Assume a final volume of 175 mL.) Zn(s) + CuCl2(aq) --> ZnCl2(aq) + Cu(s) I got the moles of Zn but don't know what to

102. ## physics

a satellite is in a circular orbit at a constant velocity around the earth. how much work is done on the satellite?

103. ## algebra

solve for y y^2-6y+9=25

104. ## algebra

f(x)=-x^2+2x+24

Multiply and divide. 1) -2 4/11(-2) 2) 5 1/7 / 4 1/8

106. ## Math

John's Specialty Store uses a periodic inventory system. The following are some inventory transactions for the month of May, 2009.

107. ## Spanish

Each of the Spanish sentences below is incorrect in either grammar or meaning. Rewrite each sentence correctly 1. El rey que canta está tocando el tambor. The king that used to sing is playing the drum. Can you check my answer: El rey que cantaba está

108. ## math

John's specialty store uses a perpetual inveentory system. the following are some inventory transaction for the month of may 2009. John's purchased merchandise on account for $5,000. Freight charges of$300 were paid in cash.John's returned some of the

109. ## Chemistry

Calculate the % by mass of sulphur in (NH4)2 SO4

110. ## PHYSICS

If Superman is flying at mach 4, 1 km above the ground and yells "Hey! Finish your test!" from directly overhead, what does it sound like when you finally hear him? Superman travels slower than light and therefore you don't hear him until he is 4.1231

111. ## math

Without calculating, comment on the statement 2 ∙ 24 ‚ 3 ∙ 23 An electrician needs 766 feet of 12-gauge wire to do a wiring job. He has 140 feet of 12-gauge wire in stock. How much more wire does he need? Decide whether or not the first number is

112. ## Psychology

The "face module," located in the right temporal lobe of the brain, explains why: the cells fire when a dog lover looks at pictures of show dogs. infants are not afraid to go to strangers. ganglion cells in this area respond to simple features. we need

113. ## trig

{Given: cos(A)=\frac: sqrt{203}/{18} {Find: tan(A) Find the positive value of the above in simplest radical form.

114. ## chem

What mass of NaCl is required to precipitate all the silver ions from 19.2 mL of 0.100 M AgNO3 solution?

115. ## astronomy

What is the electromagnetic flux coming from the surface of a 5000K blackbody?

116. ## chem.

the problem requires the quantity of NaOH, this is what i don't understand what does it mean by quantity , the volume , the mass ,or the molar concentration ?? I have to use all the things that are give to the exerc. including the 15 % concentration of

117. ## math

Find the GCF of the numbers using an appropriate method. 240, 10,000, and 4500 Find the prime factorization of the number, and write it in exponent form. 670 Find the LCM for the given numbers by an appropriate method. 24, 54, and 27

118. ## history

I read up on most of the information concerning this subject, and I still need help. Japanese Internment When President Roosevelt issued Executive Order 9066 on February 19, 1942, he authorized the evacuation of Japanese-Americans from the West Coast. Why

119. ## chemistry

determine the quantity of NaOH whose concentration is 15% to neutralize 176g H2SO4 , this is the exact problem and no its not an experiment.

120. ## english

The Lady of Shalott I have an event and have to find the quotation. 1) The handsome, dazzling figure of Sir Lancelot rides by in his shining armour. The Lady sees him in the mirror and can no longer bear her imprisonment. The quotation I think it is, is: A

121. ## English

Do you think the last sentence links to intolerance, and do you think this paragraph makes sense? The only figurative device that is completely and effectively used in Night is first-person perspective. The use of first person conveys the incidents Wiesel

122. ## Chemistry

2g NaHCO3 + .6 mL HCL --> NaCl+CO2+H2O How much carbon dioxide do I get? How do I find out?

123. ## FRUSTRATIONS OF PROGRESS;CHAOSAND COMPLEXITY

One of the greatest lasting social changes of the development of mass armies was the A. breakup of aristocracies. B. creation of national identities. C. complete militarization of European society. D. development of the idea of "total war."

124. ## physics

An electron is released from rest at the negative plate of a parallel plate capacitor. The charge per unit area on each plate is = 2.6 x 10-7 C/m2, and the plates are separated by a distance of 1.4 x 10-2 m. How fast is the electron moving just before it

125. ## politics

what are some famous dictators that were either removed or killed and what did they do?

126. ## chem.

determine the quantity of NaOH whose concentration is 15% w/v to neutralize 176g H2SO4 , this is the exact problem and no its not an experiment. sorry to bother someone of you

127. ## Physics

A cylinder ( I = 1/2 MR2), a sphere ( I = 2/5 MR2), and a hoop ( I = MR2) roll without slipping down the same incline, beginning from rest at the same height. All three objects share the same radius and total mass. Which object has the greatest

128. ## Physics

A disk lying on the XY plane rinitially roates counter-clockwise with a rotational speed of w0. After a time interval rt, the rotational speed has changed to wf moving in the clockwise direction. The average torque during this time interval is which of the

129. ## Physics

A cylinder (I = 1/2 MR2), a sphere (I = 2/5MR2), and a hoop (I = MR2) roll without slipping down the same incline, beginning from rest at the same height. All three objects share the same radius and total mass. Which object has the greatest kinetic energy

130. ## General

An advertisement has the best chance for success if it: is accompanied by loud music and rapid banter. is above threshold. contains a single subliminal message. contains a grouping of words repeated below threshold.

131. ## Physics

The constant torque required to accelerate a disk (of rotational inertia I) from rest to a speed of f rotations per second in a time interval of t is:

132. ## Physics

A ball rolls along a horizontal frictionless surface without slipping toward and incline. The ball moves up the incline a certain distance before reversing direction and moving back down the incline. In which of the following situations does the ball move

133. ## Physics

A figure skater spins on the ice, holding two weights a distance d from the axis about which he is rotating. At a certain time, he pulls these weights toward his body as shown, causing his rotational inertia to decrease by a factor of 2. How does this

134. ## Physics

A figure skater spins on the ice, holding two weights a distance d from the axis about which he is rotating. At a certain time, he pulls these weights toward his body as shown, causing his rotational inertia to decrease by a factor of 2. How does this

135. ## Physics

A wheel with radius R, mass m, and rotational inertia I rolls without slipping across the ground. If its translational kinetic energy is E, what is its rotational kinetic energy?

136. ## physics

A particle is moving clockwise in a circle of radius 1.75 m. At a certain instant, the magnitude of its acceleration is a = a = 39.0 m/s2, and the acceleration vector has an angle of θ = 50° with the position vector, as shown in the figure. At this

137. ## physics

A race car is making a U-turn at constant speed. The coefficient of friction between the tires and the track is μs = 1.0. If the radius of the curve is 40 m, what is the maximum speed at which the car can turn without sliding? Assume that the car is

138. ## physics

speedway turn, with radius of curvature R, is banked at an angle θ above the horizontal. (a) What is the optimal speed at which to take the turn if the track's surface is iced over (that is, if there is very little friction between the tires and the

139. ## History

On a website I was doing research on, there is a section about the Social Revolutionary Party in Russia in the early 1900s, which has point form information on the party. "Social Revolutionary Party: -founded in 1901 -catastrophic overthrow tsardom -most

140. ## physics

A hot stell ball of mass 1 kg is dropped into a 4 L bucket of water at room temperature (70 degrees F). If the system reaches an equilibrium temperature of 320 K, what was the initial temperature of the steel ball before it was dropped into the water? Cp

141. ## physics

Suppose the vertical loop has a radius of 8.92 m. What is the apparent weight (Wap) of a rider on the roller coaster at the bottom of the loop? (Assume that friction between roller coaster and rails can be neglected. Give your answer in terms of m and g.)

142. ## social studies

describe 2 details about the life of the Incas

143. ## Elements of Statistics

the world health organization's center of aids research is planning to write a report on aids infection among drug users all of the world. in a recent study conducted on 1,000,000 drug users, 52% indicated that they are using heroin on regular basis, 37%

144. ## algebral

What is the electromagnetic flux coming from the surface of a 5000K blackbody? I am supposed to use maxwells equation.

145. ## Physics-Please check and I need help

Please help set this up- A person goes into the electric field and has an object with a charge value of 4.2E-6C. At a distance of 10m from the object that's responsible for the elctric field, the person sees a force of 8.0N on the object they have. What is

146. ## SCIENCE

is the value of g independent of mass?

147. ## physics

You are flying to Chicago for a weekend away from the books. In your last physics class, you learned that the airflow over the wings of the plane creates a lift force, which acts perpendicular to the wings. When the plane is flying level, the upward lift

148. ## Spanish

I'm not sure if this is the proper way to write the numbers in spanish . can you correct any mistakes please. 6. dos x cien = doscientos 7. tres x cien = trescientos 8. cinco x cien = quinientos 9. ocho x cien = ochocientos 10. nueve x cien = novecientos

149. ## Physics

A 3 Kg lead ball is dropped into a 3 L insulated pail of water initially at 20.0 degrees C. If the final temperature of the water-lead combination is 25 degress C, what was the initial temperature of the lead ball?

150. ## Math

Solve 6x=x^2 - 6. Could someone give me the steps? Thanks

151. ## separation of variables

solve the initial value problem by separation of variables dy/dx=x2/y given y=-5 when x=3

152. ## separatio of variables

solve the initial value problem by separation of variables dy/dx=6x^2y and y(0)=4

153. ## trig

draw the graph of 4sin(x+30) and 2+tanx for values of x from 0 degree to 360degree and obtain the solution within the range of the equation 4sin(x+30)-tan x=2

154. ## calculus

how do you solve the initial value problem by using separation of variables dy/dx=1/y^2, y(0)=4

155. ## biology

all test crosses are back cross. but all back crosses are not test cross. justify the statment