# Questions Asked onApril 8, 2012

The solubility product expression for mercury(I) iodide, Hg2I2 is Ksp = ? My answer is [Hg2^2+^][2I^-^]^2^ Would you agree?

2. ## geometry

The trapezoids are similar. The area of the smaller trapezoid is 564m^2. Find the area of the larger trapezoid to the nearest whole number. The smaaler trapezoid is 24m, and the larger trapezoid is 57m. Possible answers: 576m^2--3,249m^2--3,181m^2--14m^2

3. ## geometry

a large triangle is 15ft and the small triangle is 9ft. the triangles sre similar what is the ratio (larger to smaller) of the perimeters? possible answers: 25/9--1/6--5/3--9/25 the triangles are similar what is the ratio ( larger to smaller) of the area

4. ## physics

An automobile traveling 95 overtakes a 1.10--long train traveling in the same direction on a track parallel to the road. Q1: If the train's speed is 75 , how long does it take the car to pass it Q2:How far will the car have traveled in this time? Q3:What

5. ## goemetry

The pentagons below are similar. The area of the smaller pentagon is 30m^2. What is the area of the larger pentagon in m^2? Small pentagon is 4m and the larger one is 10m

6. ## discrete math

Find how many positive integers with exactly four decimal digits, that is, positive integers between 1000 and 9999 inclusive, have the following properties: (a) are divisible by 5 and by 7. (b) have distinct digits. (c) are not divisible by either 5 or 7.

7. ## Physics

During each heartbeat, approximately 71 cm3 of blood is pushed from the heart at an average pressure of 105 mm-Hg. Calculate the power output of the heart, in watts, assuming 68 beats per minute.

8. ## College Physics 2056

An electromagnetic wave strikes a 3.00-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 6.00 10-4 T. How long does it take for the wave to deliver 1000 J of energy to the wall?

2 HgCl2 (aq) + SnCl2 (aq) --> SnCl4 (aq) + Hg2Cl2 (s) Hg2Cl2 (aq) + SnCl2 (aq) --> 2Hg (s) + SnCl4 (aq) For each reaction, write the two half-reactions that make it up and calculate the overall reaction potential by adding the two half-reactions. Each

10. ## geometry

Find the area of the rhombus. Leave your answer in simpliest radical form. Looks like kite the left sied top corner is 60 degrees and the bottom right corner is 6. Possible answers are: 12sqrt3--36sqrt6--72--72sqrt3 Could someone please help.

11. ## Math11

Jamal has invested 5000.00 in an account that earns 2.50% interest per annum for a term of 10 years. a) how much interest will he earn? B)How much will his investment be worth at the end of the term?

12. ## College Physics

A 40 kg child is standing on the edge of a merry-go-round in a playground. Before they were deemed too dangerous, these were quite common. They were just huge rotating platforms you could sit on while someone spun you around in uniform circular motion

13. ## math

If a spring stretches 0.9 m when a 3-kg weight is attached to it, how much will it stretch when a 4-kg weight is attached to it?

60. ## AAT

ã3tanx=3tanxcscx-ã3tanx

61. ## physics

A man (mass = 78.6 kg) is jogging through the woods and runs straight into a large oak tree at 6.1 m/s. Rebound speed is measured at 5.2 m/s in the opposite direction. If the time of contact with the tree is 0.041s, what is the magnitude of the force that

62. ## Chemistry PLZ HELP!!!!!

what types of close packed unit cells do most metals assume?

63. ## Chemistry

Write balanced net ionic equAtions. D) zinc chloride and excess ammonia E) cupric phosphate and lots of ammonia A) ammonia and excess zinc sulfate

64. ## physics

A bullet of mass m = 5.89 g is fired into a block of mass M = 3.09 kg that is initially at rest on the edge of a smooth table. (The table top is 0.83 m above the floor.) The bullet ends up stuck in the block, and together they fly off the table and fall to

65. ## Chemistry

What is the volume occupied by 12.3 g or argon gas at a pressure of 1.17 atm and a temperature of 455K?

66. ## science

A ball of mass m is attached by two strings to a vertical rod. as shown above. The entire system rotates at constant angular velocity about the axis of the rod. a)Assuming is large enough to keep both strings taut, find the force each string exerts on the

67. ## Math: Derivatives

Use the shortcut rules to mentally calculate the derivative of the given function f(x) = −x + (3/x) + 1 After deriving it, I got -1+(0/1)+0= -1 But this answer is wrong, and I don't know why. Thank You

68. ## Applied Calculus

If an object is launched straight up into the air from a starting height of h_{0} feet, then the height of the object after t seconds is approximately h=-16t^2+v_{0}t+h_{0} feet, where v_{0} is the initial velocity of the object. Find the starting height

69. ## Chemistry

What is the volume occupied by 12.3 g of argon gas at a pressure of 1.17 atm and a temperature of 455K? Would formula be V=T/P? 388.89 L?

70. ## algebra

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. Solution:2

71. ## life orientation

critically discuss 5 wayz in which the human or environmental problem impect on the community

72. ## History

civil war ---> triumph of american democracy over european aristocracy. I'm supposed to write a paragraph about this, but I don't understand it.

73. ## social studies

what is the role of US government

74. ## geometry

if a room measures 19 ft by 25 ft and covering thisroom with tile that costs .92 cents each how much would you spend

. The insoluble salts AV, B2W, C2X3, DY2, and EZ3, which were formed from the metal ions A+, B+, C3+, D2+, and E3+ and the nonmetal ions V1– , W2–, X2–, Y1–, and Z1–, all have the same Ksp value. The salt with the highest molar solubility is AV

76. ## Geometry

(1)Is a trapezoid a square? false (2) if all sides of a quadilateralare congruent,the quadilateral is a rhombis? true or false

77. ## Chemistry PLZ HELP!!!!!

how are intermolecular forces different from chemical bonds?

78. ## math plz help

how would you determine the number of diagonals in a regular 41-gon ?

79. ## Chemistry

What is the volume occupied by 12.3 g or argon gas at a pressure of 1.17 atm and a temperature of 455K? Unable to understand formula suggested Dr. Bob. Please explain further.

80. ## calculus

let R be the region of the first quadrant bounded by the x-axis and the curve y=2x-x^2. Find the volume produced when R is revolved around the X-axis

81. ## Algebra 1

An empty box weighs 6 ounces.Jenna puts 12 calculators in the box.The total weight of the box and calculators is 96 ounces.Which equation models the weight,w,in ounces of each calculator?

82. ## math

if the odds agaisnt you winning are 1 to 7,what would the probability that you would win?

83. ## Statistics

You are responsible for quickly fixing your company¡¯s computer system when it crashes. You know that there are three possible sources of errors in the system: the disk drive, the memory and the operating system. From an analysis of historical data, you

84. ## English

Need to know how to correct this run on sentences. In some parts of Canada's Northwest Territory the only way to transport supplies is over frozen lakes being a ice road tucker is one of the most dangerous jobs in the worl.d.

85. ## Math

2 round fountains which are silimiar but one measures 9'11"across and the other one measures 17'10".what would be the scale factor for the larger one?

86. ## Chemistry

What is the volume occupied by 12.3 g or argon gas at a pressure of 1.17 atm and a temperature of 455K? So...Dr. Bob... PV=nRT 1.17V=(12.3)(.08206)(455K) V=459.25/1.17 V=392.5L ???

87. ## Chemistry PLZ HELP!!!!!

write balanced equations of hydrogen with the following: a. potassium b. fluorine c. sulfur

88. ## tidewater tech

A British pharmaceutical company spent years and considerable funds on the development for a treatment for HIV patients. Now, with the protection afforded by patent rights, the company has the potential to reap enourmous gains. The government, in response,

89. ## Statistics

Alonzo applied for a job to be an administrative assistant.He had to take a typing test. His words per minute were translated into a z-score. If the z-score was 0, should he be hired? There were 47 applicants, and typing speed is very important.

90. ## math

What is 42q squared minus 19qt minus 35t squared?

91. ## Math

If an object is launched straight up into the air from a starting height of h_{0} feet, then the height of the object after t seconds is approximately h=-16t^2+v_{0}t+h_{0} feet, where v_{0} is the initial velocity of the object. Find the starting height

92. ## Calculus

Determine two sets of parametric equations for the line passing through the points P(1,7,1) and Q(3,4,4) ---------------------------------------- I got one of them but I don't know how to get a second parametric equation. first one: x=1-2s, y=7+3s, z=1-3s

93. ## grammar

which statement is suitable for a peruasive essy? As a taxpayer, I get very upset when the government raises interest rates. The state should increase driver's registration fees to pay for the new highway overpass. Lighting has been known to strike in the

94. ## chemistry

if heat of dissolution dissolution of NaCl=1700K.J/mole find heat of dissolution 11.7gm of NaCl in water

. Ksp for Fe(IO3)3 is 10-14. Two solutions, one being iron(III) nitrate and the other being sodium iodate, were mixed. At the instant of mixing, [Fe3+] = 10-4M and [IO3-] = 10-5M. What happens? My answer is that a precipitate forms because Qsp > Ksp. Would

96. ## Chemistry

100g of a saturated solution of sodium nitrate at 43°C is cooled quickly with stirring to 10°C. How many grams of the solute will crystallize?

97. ## Economics: Am I right?

I am completely stuck on these two questions. I have read my chapter, but I am still doubting that I got the answers correct. 1.A decrease in aggregate demand causes a decrease in ______ only in the short run, but causes a decrease in ______ in both the

98. ## probability question

if the odds agaisnt you winning are 1 to 7,what would the probability that you would win?

99. ## Geometry

how would you determine the number of diagonals in a regular 41-gon ?

100. ## geometry

(1)Is a trapezoid a square? false (2) if all sides of a quadilateralare congruent,the quadilateral is a rhombis? true or false

101. ## chemistry

If the.mass of 100 cm of magnesium is 1.02g, what is the mass of the magnesium if its 1.5 cm?????????????? Help!!!!!

102. ## math

Do 3x^2-7x+2=0 verify that the sum of the solution is -b/a and verify that the product of the solution is c/a

103. ## Geometry help check

(1)Is a trapezoid a square? false (2) if all sides of a quadilateralare congruent,the quadilateral is a rhombis? true or false

104. ## English

Good Easter to you and your family, too, Writeacher. I urgently need you to check this rephrase of the modern translation of the fight between Beowulf and Grendel by Seamus Heaney. I need to be more precise in the description of the fight. Nor did the

105. ## chemistry

AgNO3+NaCL=NaNo3+AgCl heat change=-36 heat of percipitation of 2 moles of AgCl???

106. ## f/celsius problem

5(30*-32)/9= im confused 5 times 2=10/9 is this correct

107. ## chemistry

if heat of precipitation of AgCl=-36k.j/mole find heat of precipitation of 287 gm of AgCl knowing that (Ag=108 . CL35.5)

109. ## Calculus

Consider line segments which are tangent to a point on the right half (x>0) of the curve y = x^2+7 and connect the tangent point to the x-axis. If the tangent point is close to the y-axis, the line segment is long. If the tangent point is far from the

110. ## physics

If the strip is 29 mm long, how far is the maximum deviation of the strip from the straight orientation? (The deviation is measured from the straight orientation from the interface of the two strips.)Radius of curvature is 53.7 m

115. ## Algebra 1a

8 Increased by b The translation is

116. ## English

Can you please check these sentences on history, please? Thank you, Writeacher. 1) In the 8th and the 9th centuries Scandinavian invaders, known as the Vikings, attacked the monasteries and villages near the water and robbed them. 2) King Alfred the Great

117. ## ALGEBRA

Find three ordered pairs that satisfy the equation. y = 5 x - 4

118. ## Physical Science

I need some help. I have tried working this problem and can't get it. A scale model of the solar system is being constructed where 40cm of the model represents 0.5 AU of actual distance. What is the model dimension, in meters, for the distance of Jupiter

119. ## Applied Calculus

An underground electricity cable is to be laid between two boat docks on opposite banks of a river. One boat dock is 600 feet downstream from the other. The river is 200 feet wide. If the cost of laying the cable is $50 per foot under water and$30 per

120. ## math

Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the remainder is -2. Find a and b.

121. ## Physical Science

I need some help. I have tried working this problem and can't get it. A class is building a scale model of the planets based on the model of Mercury having a radius 0.5cm. What is the diameter of Saturn for this model?

122. ## english

persuasive appeals (A) tone (D) ethos (E) pathos (B) logos (C) A) an appeal to logic B) the emotions that a speaker demonstrates towards his or her subject C) an appeal to the credibility of the speaker D) an appeal to a sense of right and wrong E) devices

123. ## Physical Science

I need some help. I have tried working this problem and can't get it. What is the mass of the Sun, in kilograms, based on the revolution period and distance from Venus?

124. ## Applied Calculus

If an object is launched straight up into the air from a starting height of h_{0} feet, then the height of the object after t seconds is approximately h=-16t^2+v_{0}t+h_{0} feet, where v_{0} is the initial velocity of the object. Find the starting height

125. ## Math

June rides the 15 foot tall ferris wheel at the city fair. She enters the ride at the bottom. If the ride makes 8 complete rotations before stopping, what is the total distance that June travels?

126. ## Calculus

Let L1 be the line with the vector equation r= (-2,3) +s(-1,3), seR. Let L2 be with the line with parametric equation x=3t+2, y=t-7, teR. Are L1 and L2 perpendicular? How do you know?

127. ## writing

Can someone help me describe the peruasive appeal of Dr. Kings "I Have a Dream" speech, and refering persuasive devices and literary elements in the answer

128. ## Calculus

Are the points P(1,2), Q(7,3) and R(-2,1) o the line with vector equation r=(19,5) +s(6,1), SeR

129. ## Calculus

Which plane goes through the origin and is perpendicular to the line r=(2,-2,1) + s(2,3,-4), seR? a) 2x-2y+z=0 b) 2x+3y-4z=0 c) 2x+3y+z-4=0 d) none of the above. I got D, none of the above. I have substituted and couldn't find the answer equal to zero.

130. ## government

For what reasons have many developing African nations rejected capitalism in favor of various forms of socialism? Can someone help me?

131. ## government

what are some of the drawbacks of globalization for the American economy? Please can someone help me?

The solubility product expression for mercury(I) iodide, Hg2I2 is Ksp = ? My answer is [Hg2^2+^][2I^-^]^2^ Would you agree?

133. ## physics

An automobile traveling 95 overtakes a 1.10--long train traveling in the same direction on a track parallel to the road. Q1: If the train's speed is 75 , how long does it take the car to pass it Q2:How far will the car have traveled in this time? Q3:What

134. ## English

Can I use the simple past (as used by Shakespeare) to refer to the initial relationship between Prospero and Caliban? I added a few more sentences. 1) One day Caliban tried to rape Miranda, so Prospero gave up taking care of him. 2) At the beginning

135. ## ALGEBRA

Solve the system. $\left\{ \begin{tabular}{l}$ y = x + {\color{red}-2} $\\$ y = -{\color{red}3} x + {\color{red}10} $\end{tabular} \right.$

136. ## Trig-desperate

f(x)=sin2x and g(x)=1/2tanx for x is the element of [-90;180] 8.1)calculate the x-coordinates of the points of intersection of f and g.

137. ## Trigonometry

Find the supplement of 8pi/17.

138. ## English

I left out the following sentences. Can you please check them? I hope they are the last on the same subject. I really rely on your invaluable help. 1) Caliban feels like a slave. He has o obey Prospero's orders because of Prospero's magic powers. There is

139. ## physics

State how the centripetal force is provided in the case of a satelite orbiting the earth

140. ## msu

As compared to its first year of operation, ABC company grew 8% in the second year and an additional 2% per year for the next two years. If total growth for years 2-4 was $45,000 over the first year’s sales of$150,000, how much did ABC grow in year 2?

141. ## English

Does everybody have a dark side? I need to write 4 paragraphs and I don't know how to start.

142. ## math

width to length ratio is 2:3 what is the lenght of the picnic table if the width is 26

143. ## interior decorating

the principle of color

144. ## American Literature

To what does the title of the play Dutchman by Amiri Baraka allude?

145. ## PHYSICS

A beam containing one hundred billion (i.e. 1x10^11) electrons moves perpendicula to a 4.0 Tesla magnetic field and is deflected by a 12 N force. (The electrons has a negative charge of 1.6 x 10^-19) How much total charge is contained in the beam? How

146. ## PHYSICS

A 0.75 Tesla bar magnet is placed inside of a coil made up of 350 turns of wire, each loop having an area of 0.002 m^2. How much electromagnetic flux is created when the magnet is quickly pulled out of the coil? How much voltage is induced in the coil if

147. ## Trig

A ferris wheel has a 14 meter diameter and turns counterclockwise at 6 rpm. a) Assuming that the center of the wheel is the origin of an x-y coordinate plane, write functions to find the position (x,y) of a rider that starts at the bottom of the wheel. b)

148. ## Calculus

The seesaw principle: As you probably know, any two persons can balance each other when sitting on opposite sides of a seesaw, regardless of their weights. It is only necessary that each person contribute the same moment â€” calculated by multiplying

149. ## Science

There are two objects of the same size.However, one object is made of wood, and the other object is made of plastic. Which of the following properties of the objects will be the same? A)mass B)texture C)volume D)weight Thanks!!!

150. ## scientist

Describe the changes in scientific knowledge?

151. ## Probability

Service time, T, at an auto center has a Weibull distribution with parameters θ=3.7 and β=1.35. What is the probability that at least 8 of the next 10 customers will have to wait more than 4.69 hours? What is the expected number of customers that will

152. ## Chemistry

A 1.5 liter flask is filled with nitrogen at a pressure of 12 atmospheres. What size flask would be required to hold this gas at a pressure of 2.0 atmosphere?

153. ## Algebra

solve: (1/(x-10)+(1/20)=(1/(20(x^2-100))

154. ## science

If 1.5 gals of 70 degree water is mixed with .25 gals of 32 degree water what would the temprature be?

155. ## Chemistry PLZ HELP!!!!!

explain the difference between hydrogen bonds and dipole dipole forces.

156. ## english

Choose and Place MLA, APA, or Both in the blank. _____1. In a work with a single author, the author’s last name and initials are listed in the works cited entries. _____2. In a work with a single author, the author’s full last name and first name are

157. ## chemistry

You have two SCUBA tanks, one containing air( 80% 20%) and the other containing a nitrox mix that is 60% nigtrogen and 40% oxygen. The volume of each tank is 10.00 L. Determine the number of moles of nitrogen and oxygen in the air tank.

158. ## Chemistry PLZ HELP!!!!!

what conditions must exist for a polyatomic molecule to be nonpolar?

159. ## statistics

the mean annual income for adult women in one city is and the standard deviation of the incomes is The distribution of incomes is skewed to the right. For samples of size 30, which of the following statements best describes the sampling distribution of the

160. ## Chemistry

What is the balanced equation of gaseous phosphorus pentachloride decomposed to chlorine gas and phosphorus trichloride.

161. ## English

1. what sources should you include in your works cited list? a. all of the sources that you read whether you used them in the paper. b. only the sources that have a parenthetical citation in your paper. c. most of the sources that have a parenthetical

183. ## to ms.sue

i mean when you like visit the doctor. when you go to a doctor's appointment.

184. ## Math

In archery class, Jocelyn missed the target 5 times in 40 shots. What is the probability that her next shot will miss the target?

185. ## Calculus

Determine the value of k that makes the line (x+2)/4=(y+1)/5=(z-3)/3 and r=(1,3,6 +s(-2k,2,k), SeR, perpendicular.

186. ## Pre-calculus

1)Which term best describes the linear programming situation represented by x+y=2 why is the answer infeasible? 2)Describe the linear programming situation for this system of inequalities. x < 1 y > 0 3x + y < 5 why is the answer unbounded?

187. ## Pre-calculus

1)Which of the following results in the graph of f(x) = x2 being expanded vertically by a factor of 4? the answer is f(x) = 4x2. can you explain how. 2)Which is true for the graph of y=(x^2-9)/(x^2-4). the answer is vertical asymptotes at x = ±2 . please

188. ## Chemistry PLZ HELP!!!!!

which intermolecular forces would exist between molecules of: a. H2S b. H2O c.O2 d. SiH4 e. HCl f. CH3Cl g. CO2 h. NH3

189. ## accounting

which one of the following contingencies must be accrued on the balance sheet

190. ## science

Rank the species from strongest to weakest base: Cl-, OH-,NH2

191. ## Physics

Compute the linear momentum and angular momentum of a Frisbee of mass 0.160 kg if it has a linear speed of 2.00 m/s and an angular velocity of 50.0 rad/s. Treat the Frisbee as a uniform disk of radius 15.0 cm.

192. ## Chemistry PLZ HELP!!!!!

which intermolecular forces would exist between molecules of: a. H2S b. H2O c.O2 d. SiH4 e. HCl f. CH3Cl g. CO2 h. NH3

193. ## Chemistry

How many mL of .48 M NaOH are needed to react with 2.00 moles of H3PO4?

194. ## physics-HS

Just as a car tops a 49 meter high hill with a speed of 77 km/h it runs out of gas and coasts from there, without friction or drag. How high, to the nearest meter, will the car coast up the next hill? plzzz help!

195. ## chemistry redox titration

calculate the volume of a 0.02M mno4- solution that is required to react completely with 10.0ml of 0.1M c2o4-2

Bats and dolphins both hear a ______ than humans do... a.smaller range of pitches b.smaller range of frequencies c.larger range of resonances d.larger range of pitches and frequencies

197. ## Chemistry

Why B(CH3)3 cannot be Lewis Base??

198. ## History

What struggle was there between the president and Congress for dominant political power within the federal government from 1850-1868? I know there was the reconstruction problem and how congress basically took over. What else?

199. ## investments

my broker recommends that i purchase a stock for $60.00. stock pays$2.40 in annual dividends and expects to grow 8%/year. Is this a good buy?

200. ## chem

If 0.208g of an unknown salt of oxalate ion requires 25mL of 0.02 M MnO4^- solution, calculate the molar mass and write the molecular formula of the unknown ( oxalare is the anion, what is the cation?).

What will be the amount of work done in increasing the volume of 10 mols of an ideal gas from one litre to 20 litre at 0C?

202. ## Science

I need help in Science Project. The topic is called "How does the size affect the force of magnetism". I didn't see any procedure in how to do this particular topic can you help me?

203. ## Chemistry

In a coffee cup calorimeter, 50.00 mL of HNO3 (aq) and 50.00 mL of KOH(aq) were mixed. The temperature of the resultant solution increased 6.5 C. What is the Delta H of this reaction?