# Questions Asked onFebruary 29, 2012

1. ## chemistry

Calculate the standard free-energy change for the following reaction at 25 °C. 2Au^3+(aq) + 3Ni(s) -->2Au(s) + 3Ni^2+(aq)

2. ## Chemistry - Enthalpy reactions

What is the reaction enthalpy for CaCO3(s) --> CaO(s) + CO2(g)? should i be using a enthalpy reaction table?

3. ## Math

A farmer needs to enclose three sides of a pasture with a fence (the fourth side is a river). The farmer has 42 meters of fence and wants the pasture to have an area of 220 sq-meters. What should the dimensions of the pasture be? (For the purpose of this

4. ## Chem II

PCl5 dissociates according to the reaction: PCl5(g) ↔ PCl3(g) + Cl2(g). One mole of PCl5 was placed in one liter of solution. When equilibrium was established, 0.5 mole of PCl5 remained in the mixture. What is the equilibrium constant for this reaction?

5. ## Math

You want to have 1.5 million in real dollars in an account when you retire in 40 yeras. the nominal return on your investment is 11 percent and the inflation rate is 3.8 percent. What real amount must you deposit each year to achieve your goal? My answer

6. ## physics

A science museum has asked you to design a simple pendulum that will make 25.0 complete swings in 85.0 {\rm s}. How long should the pendulum be? in meters

7. ## Physics

A 3.00 - µF and a 4.00 - µF capacitor are connected in series, and this combination is connected in parallel with a 2.00 - µF capacitor (see the figure ). What is the net capacitance? 3.00 - µF 4.00 - µF 2.00 - µF 26.0 V

8. ## Catering(Gourmet Essentials)

1. In the dining room brigade system, the positions of maitre d’hôtel and/or captain may be combined under the title of A. communard. C. chef de salle. B. boulanger. D. sommelier. 2. Rachel and Mark are discussing the requirements of a healthy diet.

9. ## Gen Chem

At elevated temperatures, solid silicon reacts with chlorine gas to form gaseous SiCl4. At some temperature, the equilibrium constant for this reaction is 0.30. If the reaction is started with 0.10 mol of SiCl4 in a one-liter flask, how much Cl2 will be

10. ## Elementary statistics

Nine apples, four of which are rotten, are in a refrigerator. Three apples are randomly selected without replacement. Let the random variable x represent the number chosen that are rotten. Construct a table describing the probability distribution, then

11. ## arithmetic

if 6 times the sixth term is equal to 15 times the fifteenth term ,find its 21st term

12. ## Math

A cylindrical tin can has a radius of 4.5cm and a height of 5 cm (a)What is the surface area of the can (b)What is its volume? (c)What is the cans capacity could somebody please answer this question so i can get past with math

13. ## chemistry

Rank these species by their ability to act as an oxidizing agent. Na^+ I2 Cr^3+ F2 Put best oxidizing agent first and continue to have best reducing agent last.

14. ## chemistry

As the pH of a system decreases: the [H+] decreases the Kw decreases the [OH-] decreases all of the above

15. ## Trig

A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 3 mi apart, to be angle x = 31° and angle y = 49°, as shown in the figure. (Round your answers to two decimal places.) Find the distance of the plane from

16. ## chemistry

2H2(g)+S2----------->2H2S A.)how would the equilibrium be affected given the following: - increase in temperature= - increase in hydrogen concetration= - increase in reaction container volume= B.) what is equilibrium expression?? please help anywork would

Yolando Bravo wants to make the following deposit: 1 20 dollar bill 3 5 dollar bills 4 1 dollar bills 7 quarters 6 dimes 8 nickels 64 pennies 1 paycheck for $328.92 1 refund check for %18.95 i try to do this i been stuck on this problem all freaking day 18. ## Algebra what is the complete factored form of this expression? 3m ( n + 2 ) + p ( n + 2 ) 19. ## Calculus (Area Between Curves) Find the area of the region IN THE FIRST QUADRANT (upper right quadrant) bounded by the curves y=sin(x)cos(x)^2, y=2xcos(x^2) and y=4-4x. You get: a.)1.8467 b.) 0.16165 c.) 0.36974 d.) 1.7281 e.) 0.37859 Based on my calculations, I would say that the 20. ## Calculus (Area Between Curves) Find the area of the region IN THE FIRST QUADRANT (upper right quadrant) bounded by the curves y=sin(x)cos(x)^2, y=2xcos(x^2) and y=4-4x. You get: a.)1.8467 b.) 0.16165 c.) 0.36974 d.) 1.7281 e.) 0.37859 21. ## computers Which of the following html tags would you use after a table? A. B. C. D. i say b. 22. ## physics How could the age of this asteroid fragment be determined? 23. ## Bio please help! What is a vital process performed by proteins embedded in cell membranes? 24. ## physics Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 25.0 in a direction 60.0 west of north. Jane walks 14.0 in a direction 30.0 south of west. They then stop 25. ## Chemistry If the percent yield was 81.5%, how many grams of aluminum were used to prepare 20.0 g of potassium alum? 26. ## Physics A circular loop of wire with radius 0.0450 m and resistance 0.154 R is in a region of spatially uniform magnetic. The magnetic field is directed out of the plane. The magnetic field has an initial value of 7.89 T and is decreasing at a rate of -0.630 T/s. 27. ## Calculus (Definite Integrals) How many definite integrals would be required to represent the area of the region enclosed by the curves y=(cos^2(x))(sin(x)) and y=0.03x^2, assuming you could not use the absolute value function? a.) 1 b.) 2 c.) 3 d.) 4 e.) 5 28. ## math percents can you check these: what percent of 64 is 48? i got 75% 25% of what number is 24? i got 96 48% of 83 is what number? i go 39.84 what percent of 530 is 107? i got : 201.88 62% of what is number is 84? i got 135.48 what percent of 42 is 7.5? i got 17.86 37% 29. ## Chemistry For H2(g) + Br2(g) -> 2HBr(g) k=64 30. ## statistics Suppose your statistics instructor gave six examinations during the semester. You received the following grades (percent correct): 89, 64, 88, 89, 91, and 75. Instead of averaging the six scores, the instructor indicated he would randomly select five 31. ## PHYSICS!! SOS Determine the scalar product of A= 3.0i + 1.0j - 2.0k and B= 3.0i - 2.0j - 3.0k . 32. ## Chemistry What amount of hydrogen peroxide should result when 1.21 g of barium peroxide is treated with 25.1 mL of hydrochloric acid solution containing 0.0289 g of HCl per mL? 33. ## physics An 840 Kg roller coaster car is launched from a giant spring of constant k=31 kN/m into a frictionless loop-the-loop track of radius 6.2 m, as shown below. What is the minimum amount that the spring must be compressed if the car is to stay on the track? 34. ## physics Asteroids can be classified into two broad groups based on their composition and location: carbon-rich asteroids dominate the outer part of the asteroid belt, whereas metal-rich asteroids dominate the inner part of the belt. Analysis of the fragment we 35. ## Chemistry Calculate the volume (in mL) of 9.0M H2SO4 that you would need to convert 0.070 moles of KAl(OH)4 to K2SO4 and Al2(SO4)3 according to the following equation: 2 KAl(OH)4 + 4 H2SO4->K2SO4 + Al2(SO4)3 + 8 H2O 36. ## Math problem a little confused please help what is the square root of 160- square root of 20. 37. ## Chemistry Charges on the metal MgSO4 = +2 NiSO4*6H2O = +2 CoCl2*6H2O = +2 KCr(SO4)2*12H2O = +3 CuSO4*5H2O = +2 (NH4)2Cr2O7 = +2 FeSO4*7H2O = +2 MnCl2*4H2O = +2 FeCl3*6H2O = +3 38. ## To Ian I've removed your post because you put your email address in it. That's not a good or safe thing to do online. If you wish to re-post your question, that's fine. Just don't include any personal information, such as your full name, email address, etc., if 39. ## Physics A roller coaster (491 kg) moves from A (1.09 m above the ground) to B (26.3 m above the ground). Two non-conservative forces are present: friction does -2.39 x 104 J of work on the car, and a chain mechanism does +5.18 x 104 J of work to help the car up a 40. ## math A trough is 11 feet long and has ends that are isosceles triangles that are 1 foot high and 2 feet wide. If the trough is being filled at a rate of 9 cubic feet per minute, how fast is the height of the water increaseing when the height is 7 inches? 41. ## algebra During a sale, a dress decreased in price from 95$ to 81%. What was the percent of the decrease?

factor labels 200ml per hour to kl per year

43. ## math

A recipe calls for 3 2/3 cups of orange juice.You want to make half of the recipe.How many cups of juice should you use?

44. ## chem

how many liters hydrogen if you react 3.51 L of .97M hydrochloric acid with excess zinc?

45. ## physics

A 0.50-kg block, starting at rest, slides down a 30.0° incline with kinetic friction coefficient 0.30 (the figure below). After sliding 84 cm down the incline, it slides across a frictionless horizontal surface and encounters a spring (k = 33 N/m). (a)

46. ## algebra

Factor out the greatest common factor in the expression? 11y^5-55y^2

47. ## english

could you please tell me how to make use of will be in language use eg i will be there she will be a unique woman

48. ## Trig

When two bubbles cling together in midair their common surface is part of a sphere whose center D lies on the line passing through the centers of the bubble. Also, angles ACB and ACD are 60 degrees. Show that the radius r of the common face is given by

Sam is making muffins. One bath is blueberry and one batch is bananna. The third bath is twice as big as the blueberry and bananna batch. If Sam made 96 muffins, how many muffins were in the blueberry and banana batches? I came up with 32 can someone

65. ## AP CHEMISTRY

Calculate the pH at the equivalence point in titrating 0.100 M solutions of each of the following with 0.080 M NaOH. a)hydrobromic acid (HBr) b)chlorous acid (HClO2) c)benzoic acid (C6H5COOH)

66. ## Chem (Thermodynamics)

The standard molar enthalpy of fusion and the standard molar enthalpy of vaporization of benzene are 10.9 kJ/mol and 31.0 kJ/mol, respectively. Calculate the standard molar entropy changes for the solid ↔ liquid and liquid ↔ vapor transitions for

67. ## Calculus (Area Between Curves)

Find the area of the region bounded by the curves y^2=x, y-4=x, y=-2 and y=1 (Hint: You'll definitely have to sketch this one on paper first.) You get: a.) 27/2 b.) 22/3 c.) 33/2 d.) 34/3 e.) 14

68. ## Physics

One kilowatt-hour (kWh) is the amount of work or energy generated when one kilowatt of power is supplied for a time of one hour. A kilowatt-hour is the unit of energy used by power companies when figuring your electric bill. Determine the number of joules

69. ## calculus

Determine the intervals on which f(x) is continuous f(x)=15sin(x^2+71)

70. ## Chemistry

Consider the reaction in aqueous solution: 6 HCl + 2 KMnO4 + 5 H2O2 ---> 5 O2 + 2 MnCl2 + 2 KCl + 8 H2O 1.) Write the total ionic equation. 2.) Write the net ionic equation. 3.) For each species (molecule or ion) in the net ionic equation, assign oxidation

71. ## math

if f(x)=5x+2 and g(x)=3x-4,find (fog)(x)

72. ## managerial economics

Qd=15.0-0.2P where Qd is annual quantity demanded in millions of units and P is the wholesale price. Incurred cost of $60 million. Production cost is$5/unit. (1) what is wholesale price, (2) production annually, (3) annual profit? Given this is a monopoly

73. ## math 6th

8x10=80 90x5450

74. ## math

the book has a mass of 2 kilograms. what is the mass of 3 of these books?

75. ## algebra

3 pencils cost $.03 more than 2 pen,and 1 pen and 10 pencils together cost$2.40.Determine the cost of each writing tool

Dwayne eats 1/9 of the raisin bread. Francisco eats 1/3 of the raisin bread. Who eats more raisin bread?

77. ## physics

A small rocket is fired directly upwards with an initial velocity of 100m/s, How many seconds will it take to reach its maximum height?

78. ## Math

A pipe tapers 0.75 inches for every 30 inches of length.Use a constant of direct variation to determine the amount of taper of a 105 inches length. I need help with finding a constant of direct variation.

79. ## Chemistry 12 - Gases

What volume of oxygen (at 82.1 oC and 713 mmHg) will be produced by the decomposition of 5.71 potassium chlorate? i am not sure what the unit is on the 5.71 ( cause it's not given) so that's not a typo.

80. ## Calculus AP need help!

its difficulty problem. find dy/dx by implicit differentiation 1.4 cos x sin y = 1 2.tan(x/y)= x+y

Makoto and Otis each decorate diamond patterns that are the same size and shape. Makoto deoorates 1/8 of a diamond. Otis decorate 1/4 of a diamond. Who decorates more

82. ## physics

In this current of 12 volts, the voltmeter registers a voltage drop of 4 volts across 1 resistor, what is the voltage drop across the other resistor?

83. ## Math

Can someone please tell me Why is (4x + 5) (2x - 1) + (x - 9) (2x - 1) not in factored form? What is the correct final factored form? What is this factoring method called?

84. ## Calculus

Let f(x)=(2x^3-x^2+2x+1)/(x^2+1). What is the equation of the oblique asymptote of f(x)? Can someone show me how to do the long division one for this question. I have always used synthetic division but realized there are some questions that require to do

85. ## homonyms

what is the homonym 4 urn

86. ## Calculus AB

Evaluate the indefinite integral of (ln(x))/(x + xln(x)) dx by using variable substitution. Show all steps of your work.

87. ## Calculus-derivatives

f(x) = (x-1)^(2/3)*(x+3) What are the critical numbers? the derivative would be =2/3(x-1)^(-1/3)(x+3) + (x-1)^2/3 What do I do next?

A small, spherical bead of mass 1.9 g is released from rest at t = 0 in a bottle of liquid shampoo. The differential equation of motion is dv/dt = g−b/m*v . The terminal speed is observed to be 1.6 cm/s. The acceleration of gravity is 9.8 m/s2 . Find the

89. ## English

Are the verbs in these sentences passive voice, weak or past tense. My answers: 1. The book was informative but too long.--weak or past or both?? 2.The teachers have sent the book to the publisher.--past 3.The essay has been shortened by ten pages.-- past

90. ## chemistry

ndicate whether each solution is acidic, basic, or neutral. a. [H3O+] = 6.9 x 10-1 M This solution is acidic. b. [H3O+] = 8.2 x 10-13 M This solution is basic. c. [H3O+] = 3.2 x 10-1 M This solution is acidic.

91. ## PHYSICS

The total resistance is 13.0 kΩ, and the battery's emf is 28.0 V. If the time constant is measured to be 34.0 µs . Calculate the total capacitance of the circuit. Calculate the time it takes for the voltage across the resistor to reach 11.0 V after the

92. ## algebra

how do you find the square root symbol on the computer

93. ## chemistry

alculate the H3O+ concentration present in water under the following conditions. Enter your answer in scientific notation. a. [OH-] = 8.9 x 10-5 M 1.1E-10 b. [OH-] = 3.8 x 10-3 M 2.6E-12 c. [OH-] = 4.8 x 10-12 M 2.1E-3

94. ## math

Stephen had 4 3/8 pizza at his party. If each person ate 1/8 of the pizza, how many people ate pizza at Stephens party?

95. ## Math

100Ã—431Ã·8576-234+65454Ã—443321167899= [this might be hard]

96. ## algebra

(3x3-4x2 -x+6) Divide By (x-2) its 9three x cubed negative 4 xsquare -x+6) divide by (x-2)

97. ## question

anyone who knows that the school of journalism in Indiana university is a good one? how about the major public relation in the school?

98. ## Chemisty

Identify the limiting and excess reagent for each of the following scenarios involving the formation of silicone dioxide, SiO2. If you could just get geared in the right direction that would be wonderful. I am just a bit confused with this question. Thank

99. ## calculus

Determine values of a and b that make the given function continuous . 16sinx÷x f(x)= a bcosx It's a bicewise function

100. ## math

A 4 1/2ft ribbon is cut into 6 equal-length pieces.How long is each piece?

101. ## Calculus AP need help!

i don't know how or what to starts Find the slope of the tangent line to the curve 4x^2+3xy+3y^3=-251 at the point (-4,-5)

102. ## college calculus

how do i solve sin(x)+2cos(2x)=0

103. ## chemistry

Calculate the pH of a 0.0019 M HNO3 solution.

104. ## social studies

can you recommend some websites that would be good to find out information on the peaceful transition of power (election of 1808), stronger federal government (federalist party belief in stronger government), foreign policy (waging the war of 1812), and

105. ## geometry

if a is (3,0) and b is (11,6) and ab is 2x+4 then what does ab equal?

106. ## algebra

f(x) = 1-4x, (gof)(x) = 5-2x find g(x)

107. ## Accounting

If Tom, an accountant, agrees to provide accounting services to Carl, a friend, in exchange for Carl fixing Tom's office floor, then: (Points : 1) Tom must report income on his tax return. Carl must report income on his tax return. Neither Tom nor Carl

108. ## filing names

I have a practice work sheet and I have asked people to explain to me and I still just don't get it ... so I am really wanting someone to explain the answers to me and why they are right. All it says on directions is choose the correct place for name. I

109. ## physics

A spring gun (k = 26 N/m) is used to shoot a 56-g ball horizontally. Initially the spring is compressed by 17 cm. The ball loses contact with the spring and leaves the gun when the spring is still compressed by 12 cm. What is the speed of the ball when it

-5z-2

111. ## chemistry

a. How many moles of NaOH are present in 89.6 mL of 0.714 M NaOH? 6.40E-2 b. How many moles of HCl are present in a 30.0 mL sample that is neutralized by the 89.6 mL of 0.714 M NaOH? 6.40E-2 c. What is the molar concentration of the HCl solution described

112. ## chemistry

Calculate the pH of a 0.0019 M HNO3 solution. 2.7

113. ## Math- Exponent Laws.

Simplify, "put the power into a single positive exponent." -(-2)^0*(-2)^3*(-2)^-4/(-2)^3 please help I am so lost on how to solve this problem!! I have been trying to figure it out for days. the - in front of the (-2) is very confusing.

How would you set up this problem if instead of using 1000 feet of fencing, only 750 feet of fencing is used? Solve the problem to find the maximum area..

115. ## strayer

You are playing Guess Your Card with three other players. Here is what you see: •Andy has the cards 1, 3, & 7 •Belle has the cards 3, 4, & 7 •Carol has the cards 4, 6, & 8 Andy draws the question card, “Do you see two or more players whose cards

116. ## algebra 2/math

how do i factor x^3+2x^2-x-2

117. ## logic application

You are playing Guess Your Card with three other players. Here is what you see: •Andy has the cards 1, 3, & 7 •Belle has the cards 3, 4, & 7 •Carol has the cards 4, 6, & 8 Andy draws the question card, “Do you see two or more players whose cards

118. ## Calculus (Area Between Curves)

Find the area of the region bounded by the curves y=x^(-1/2), y=x^(-2), y=1 and y=3. You get: a.) 1/2(sqrt(3)) + 4/3 b.) 2(sqrt(3)) - 8/3 c.) 1/2(sqrt(3) - 32/3 d.) 2(sqrt(3)) - 32/3 e.) 8/3 - 2(sqrt(3))

119. ## chemistry 12 - gases

The molecular formula for this compound (14.37% H, density of 1.13 g/L at 24 C and 743 mmHg) is C_H_ I am not sure how to use this information

120. ## Binomial expansion

The coefficient of x^2 in the expansion of (4-3x)^n as a series of ascending powers of x is -9/64. Show that n satisfies the equation 4^(n+1)=2/[n(1-n)] and hence verify that n=1/2. I can do the first part of the problem: 4^n*3^2*n(n-1)/2!*2^4=-3^2/2^6

121. ## Calculus AB

The integral from a to b of f(x)/g(x) equals ln[(g(b)/g(a)]. Find g'(x), and explain your reasoning.

122. ## stats

a sample of 16 atm transactions shows a mean transaction time of 67 seconds with a standard deviation of 12 seconds. State the hypotheses to test whether the mean transactiontime exceeds 60 seconds

123. ## math

how to find the area of a square

The equation A + 2 B = C + D describes an elementary reaction, which takes place in a single step. Thus, the rate law must be? My answer is k(A)(B)^2 Is this correct?

125. ## trig

Expan each of the following using the compound-angle formulae:sin(x + 20degree)

126. ## Chemistry

What how can I calculate the amount in moles and the mass in grams of KOH needed to convert 1.50 g of aluminum to KAl(OH)4. Balanced equation = 2 Al (s) + 2 KOH (aq) + 6 H2O (l)->2 KAl(OH)4 (aq) + 3 H2 (g) Please show steps ..

128. ## Statistics/Chi Square

I have a question to do in which the efficacy of a drug used to treat panic disorder is tested. Patients are given a placebo for one week and then the drug for one week, and the number of panic attacks is measured for each week. The data looks like this:

129. ## Chemistry

How many moles of chlorine are needed to react with 2.5 moles of sodium?

130. ## Chemistry

What are the boiling point of a solution prepared by dissolving 2.40g of biphenyl(C^12H^10) in 75.0g of benzene? The molecular weight of biphenyl is 154..

131. ## physics

A ball of mass 540 g hangs from a spring whose stiffness is 155 newtons per meter. A string is attached to the ball and you are pulling the string to the right, so that the ball hangs motionless, as shown in the figure. In this situation the spring is

132. ## Chemistry

What are the boiling point of a solution prepared by dissolving 2.40g of biphenyl(C^12H^10) in 75.0g of benzene? The molecular weight of biphenyl is 154..

133. ## Math

simplify 5^0 1 (5^2)^4 ---- * ---- / ----- 5^-6 5^-11 (5^10)^2

134. ## math

a textbook has 50 more than two times the number of pages as a workbook. combined, they have 230 pages. how many pages are in the textbook?

135. ## math

what is x? x + 2 11/14 = 5 13/21 basically, i want to know the formula to finding x. i tried to change the fractions to eqivalent fractions... any other ways?

136. ## math

Why do my numbers scramble when I post math homework into my classroom forum posting box when I click on post message?

137. ## physics 101

A horizontal force of magnitude F = 164 N is used to push a box of mass m = 7 kg from rest a distance d = 17 m up a frictionless incline with a slope q = 31°. How much work is done on the box by the gravitational force during this same displacement?

138. ## English

ms. sue i wrote out this story i read in class in word document u please read it and help with questions? if only you not mind.

139. ## Chemistry 12 - Gases

A gas is initially at 345 K, 821 torr, and occupies a volume of 5.85 L. What volume will the gas occupy if the temperature and pressure decrease, respectively, to 7 degrees celsius and 0.921 atm?

140. ## HELP PHYSICS!!!!

a worker pushes a 7kg shipping box along a roller track. assume friction is small enough to be ignored because of the rollers. the worker's push is 25 N directed down and to the right at an angle of 20 degrees. 1. determine the horizontal component of the

141. ## Biology

Jessica has no dimples and attached ear lobes. Jessica's mother has dimples and detached ear lobes, and her father has no dimples and attached ear lobes. Assuming independent assortment, what are the chances that her new baby brother will have dimples and

142. ## English

Writeacher, here are my sentences on phrasal verbs I urgently need you to check. Thank you. 1) I can’t get around to thanking you for your hospitality.I’ll get back at you for being so rude to me. 2) When will you get around to clearing your room?He is

8cos6xsin6x

144. ## Math

Write an equation of the line with y-intercept 4 that is parallel to the line whose equation is y=3x+2

145. ## Pre-Cal

Convert the given exponential function to the form indicated. Round all coefficients to four significant digits. f(x) = 9e^3x; f(x) = Ab^x How do i solve the equation with this formula? Thanks

146. ## chemistry

what are the charges on the metals? MgSO4 NiSO4*6H2O CoCl2*6H2O could you just explain how you determined the first one? I can take it from there.

How long will it take a $400 investment to be worth$700 if it is continuously compounded at 12% per year? I got the answer 6.71 years, but it was wrong, using the A=Pe^rt Thank you

I'm having a problem answering some questions we're learning about shopping and stuff like that so could someone check these please. 1. ¿Qué buscas cuando vas te compras? Busco variedad de cosas cuando voy me compro. 2. ¿Quien es la persona mas de moda

149. ## Math

How long, to the nearest year, will it take an investment to triple if it is continuously compounded at 18% per year? I used A=Pe^rt to get the wrong answer 20 years. Don't understand what is wrong Thanks

150. ## chemistry

The voltage generated by the zinc concentration cell described by, Zn(s)|Zn2 (aq, 0.100 M)||Zn2 (aq, ? M)|Zn(s) is 23.0 mV at 25 °C. Calculate the concentration of the Zn2 (aq) ion at the cathode.

155. ## Pre-Cal

This exercise is based on the following table, which lists interest rates on long-term investments (based on 10-year government bonds) in several countries in 2008. How long, to the nearest year, will it take an investment in Germany(4.3%) to triple its

156. ## PHYSICS

A 50KG BLOCK IS BEING PULLED BY a 200-N FORCE ON A HORZONTAL ROUGH SURFACE AS SHOWN IN DIAGRAM.IF THE COEFFICIENT OF KINETIC FRICTION BETWEEN THE BLOCK AND THE SURFACE IS 0.3. FIND THE ACCELERATION OF THE BLOCK

157. ## chemistry

What is the color of a neon light?

158. ## Pre-Cal

If the interest on a long-term Canadian(3/8%) investment is compounded continuously, how long will it take the value of an investment to triple? (Give the answer correct to two decimal places.) Got 19 years--its wrong, can't find reason. Thanks.

159. ## Kinesology

A person performs a work task at a mechanical efficiency of 20 percent and at total energy output of 15kcal/min. How much energy(kcal/min) is lost as heat? and how much energy(kcal/min) is used to actually perform the work?

160. ## math

How many people would it take to produce a human pyramid 12m tall? Give various methods

161. ## English

Here are the other sentences.Thank you. 1) She took on responsibility for the whole family.She forgot to turn down the gas and burned her dinner. 2) How many people turned up at your party? That child is bringing up food. She brought up three children

162. ## science

Explain why one must the absolute temperature scale to solve gas problems

163. ## chemistry

Calculate the cell potential for the following reaction as written at 53 °C, given that [Zn2 ] = 0.862 M and [Ni2 ] = 0.0110 M. Standard reduction and oxidation potentials can be found here. Zn(s) + Ni^2+(aq) --> Zn^2+(aq) + Ni(s)

164. ## chemistry

why does a sodium street lamp give off a different color light than a neon light?

165. ## Calculus

what is the curve given by the equation x^3=3xy^2+y^3=1 what is dy/dx?

166. ## Constitutional Law

What authority stems from the necessary and proper clause? just wanting some links that will help get the ball rolling please.

167. ## physics

if the force applied perpendicularly on a given surface is applied on a small area then pressure is?

168. ## geometry b

find the area of a triangle with base of 5 and a height of 3 and 3/4

169. ## physics

liquid pressure is independent on the? a. shape of the containing vessel b. area of the bottom of the containing vessel c. both a and b and d d. height of the containing vessel

what does fiscal and monetary policies mean

171. ## PHYSICS

A 50KG BLOCK IS BEING PULLED BY a 200-N FORCE ON A HORZONTAL ROUGH SURFACE AS SHOWN IN DIAGRAM.IF THE COEFFICIENT OF KINETIC FRICTION BETWEEN THE BLOCK AND THE SURFACE IS 0.3. FIND THE ACCELERATION OF THE BLOCK

172. ## physics

describe how would you find the dencity of a human

173. ## Science

A person performs a work task at a mechanical efficiency of 20 percent and at total energy output of 15kcal/min. How much energy(kcal/min) is lost as heat? and how much energy(kcal/min) is used to actually perform the work?

174. ## Math

A scale drawing of a house is 15 cm high. If the drawing was built with a scale of 1 cm: 2.5ft, how high was the actual house

175. ## English

how would you edit, misty could you walk ms millers dog on tuesday mom asked

176. ## Algebra 2

What is each product or quotient in simplest form? a) √3(4√3) b)√x^3/3√x^2 c)√7(3√7)

177. ## ALGEBRA II

factor (2x^2 - 48)

My investment in Edgewater stocks is losing half its value every 2 years. Find and interpret the associated decay rate. If I use the formula y=100(1/2)^x (

179. ## Prob&stats

Search results for: Using numbers 1-20 what is probability a randomly chosen number is either an even number or a number greater than 14?

180. ## Physics

In the figure below, assume that the slope is frictionless and that the two blocks are connected by a massless cord. Assume the following: θ1 = 37° θ2 = 45° m1=3kg m2=0.86kg. What is the tension in the cord?.

181. ## trig

Find the value of theta (in radians) corresponding to the point (6,-8)

182. ## Writing

Need help completing a 5-7 page paper on the importance of Academic Honesty with proper APA format with 3-5 peer reviewed references

183. ## math

A contactor is making preparations to re-tile the border around a swimming pool. The pool measures 60 feet by 30 feet. The border extends 1 foot from each side of the edge of the pool. The contractor is going to use that are 0.25 feet squared. A case of

184. ## math

what is the area of a triangle with 18 inches and the height is 12 inches she wants to cover the flag with red contruction paper how many square inches of paper will she need?

185. ## Chemistry

Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) A. 20.2 B. 2.06 X 10-4 C. 4.49 D. 4.84 X 10-3 E. 0.223

186. ## math

The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material?

187. ## Chemistry

Using this data, 2 NO(g) + Cl2(g) == 2 NOCl(g) Kc = 3.20 X 10-3 NO2(g) == NO(g) + ½ O2(g) Kc = 3.93 calculate a value for Kc for the reaction, NOCl (g) + ½ O2 (g) == NO2 (g) + ½ Cl2 (g) A. 20.2 B. 2.06 X 10-4 C. 4.49 D. 4.84 X 10-3 E. 0.223

188. ## HIS/115

Compare European settlements in New England, the Middle Colonies, the Chesapeake, and the South in terms of goals, governments, social structures, and religions. What similarities do you find most remarkable? What differences do you find interesting? Why?

189. ## Chemistry

For the system CaO(s) + CO2(g) = CaCO3(s), I added 1.00 mol of CaO(s) to 1.00L of 0.500M CO2(g) at 200C. At equilibrium the [CO2] = 0.150M. What is the value of Kp for this reaction? A. 0.172 B. 0.150 C. 5.82 D. 6.67 E. 2.59

190. ## Math

Express the following as a fraction with a single denominator: 1/(2a-3) - 2/(3-2a) + 18/(9-4a^2)

191. ## Math

henry is 5ft tall and casts a shadow that is 15ft long a tree next to henry casts a 324-ft long shadow. how tall is the tree?

192. ## Physics help?

The total resistance is 13.0 kΩ, and the battery's emf is 28.0 V. If the time constant is measured to be 34.0 µs . Calculate the total capacitance of the circuit. Calculate the time it takes for the voltage across the resistor to reach 11.0 V after the

193. ## Prob&stats

Search results for: Using numbers 1-20 what is probability a randomly chosen number is either an even number or a number greater than 14?

194. ## algebra

Find the solution to 36z^2+96z+15=0

195. ## science

Two bricks having a 22N force applied on them and each brick having a friction of 1N ,the first brick with the mass of 2kg and the second one having a mass of 3kg.calculate the acceleration that the first brick expiriences

196. ## algebra

(-5,-2,) end point (-7,-5) mid point, how do I find another end point?

197. ## ALG2

x2 + bx + c and ax2 + bx + c could you factor this and explain it.

198. ## Science

Why is there no real surface of the sun?

199. ## WORLD HISTORY

My teacher ask us to draw a picture that represents a command economy what can I draw??

200. ## algebra

Simplify 5m - 13n - n + 4m.

201. ## physics- i need help ASAP

A ship leaves the island of Guam and sails a distance 265 km at an angle 41.0 north of west. ***In which direction must it now head so that its resultant displacement will be 130 km directly east of Guam? (Express your answer as an angle measured south of

202. ## poetry

who are the "fools" mentioned in the poem "Trees"; poets, gods, trees, robins

203. ## math

In polk middle school, 45% of the students are 6th graders, 35% of the students are 7th graders and the remainder are 8th graders. Would a circle graph of this data that had 3 sections each with a central of 120% be misleading?

Insert parentheses in the false number sentence to make it true. -3+5*2-(-6)=37

205. ## physics

You walk 50 m to the north, then turn 60° to your right and walk another 45 m. How far are you from where you originally started?

206. ## physics

You walk 50 m to the north, then turn 60° to your right and walk another 45 m. How far are you from where you originally started?

207. ## Math

undefined is what % of undefined?

208. ## physics

An apple falls from an apple tree growing on a 20° slope. The apple hits the ground with an impact velocity of 14 m/s straight downward. What is the component of the apple's impact velocity parallel to the surface of the slope?

209. ## math

if the width of a baseball field is 40 meters and the perimeter is 120 meters what is the length?

210. ## math

What can 32 and 45 both be divided by?

211. ## math

i need help doing these type problems.... example 3 1/3- 2 1/2=

212. ## math

JUDY & RAMEY TOGETHER HAVE 42 STUFFED ANIMALS. JUDY HAS 12 FEWER ANIMALS THAN RAMEY. HOW MANY STUFFED ANIMALS DOES EACH GIRL HAVE?

213. ## ALGEBRA II

(3b-2)/(b+1) = (4)- (b+2)/(b-1) The (b+2)/(b-1) is separate from the 4. the 4 isn't included in the division

simon ate 3/2 slices of an apple. Did he eat less than a whole apple or more than the whole apple. Draw a picture to show your answer

216. ## science

An apple is dropped from a window 20 m above the ground. How long does it take the apple to reach the ground? What is its final speed?

217. ## Chemistry

A particular reaction has an activation energy of 51.6kJ/mol-rxn. How much faster is the reaction at 50 degrees C versus 25degrees C? I do not know how to start this!

218. ## Science help!

adding magenta and yellow dyes makes what color? At first i thought it was red. but when I realized we are adding dye's not light im thinking its black.. but im not sure! please help!

Find the slop of the tangent to the curve y=(10-sqrt x)(5+sqrt x) at x=25

220. ## math

valarie makes 2 pans of brownies for a bake sale. She cuts each pan into 12 brownies. She sell 15 brownies. What fractional part of a pan of brownies did valarie sell?

221. ## calculus

Find the volume when the area bounded by f(x) = xe^x, y = e, and the y-axis, is revolved around the y-axis.

222. ## English

Thank you. I left out the following phrasal verbs. I added a paragraph on youth cultures I also need to prepare. Thank you. 1) I couldn’t get off last night. It must have been the coffee. His lawyer managed to get him off. He got off/away with a fine. 2)

224. ## English

I left out a few sentences. Thank you very much, Writeacher. 1) ames is particularly interested in the language of youth. He believes that the greatest influence on teenagers is the media. It’s the constant bombardment from advertising that youth cannot

225. ## algebra

Can someone please show me how to solve this problem step by step thanks an advance sqrt 7x sqrt 21y multiply then if possible simply by factoring

226. ## math/algebra

three fourths = seven tenths = two thirds = eleven twentieths = five eights = twenty one twenty five =

227. ## Physics

A beam with a length of 7 m and a mass of 110 kg is attached by a large bolt to a support at a distance of d = 3 m from one end. The beam makes an angle θ = 30° with the horizontal, as shown in the figure. A mass M = 492 kg is attached with a rope to one

graphic sources are sources of information such as maps charts illustractions,and captions. graphic sources help us understand information in a text,or they can provide information on their own. directions read the following chart. then answer the

229. ## chemistry 103

what is electron cofiguration?

230. ## math

four more than a number is 12

231. ## math

Okay,whenever I ask jiska for math help.. or any help I ALWAYS get those questions wrong -.-

232. ## chemistry

2Al(S)+3H2O(g)---->Al2O3(s)+6H2(g) A.) what is the correct equilibrium expression?

233. ## Math

4 students each wrote 2 number patterns Shandi 3,6,9,12... 5,15,20,25 Latrell 1,3,5,7...3,5,7,9 Hong-Li 0,1,3,6...1,2,4,7 Adriano 2,3,5,7...11,13,17,19 Which student's number patterns used only prime numbers? A.Shandi B.Latrell C.Hong-Li D.Adriano D?

234. ## Math

simplify the expression: 9-2x+10

235. ## statistics

We have a group of 75 people and for their raw scores, you are given the Mean (M = 30) and variance (VAR = 16). Assuming a normal distribution of scores, what is the probability of randomly selecting a score between 27 and 31 for this group?

valarie makes 2 pans of brownies for a bake sale. She cuts each pan into 12 brownies. She sell 15 brownies. What fractional part of a pan of brownies did valarie sell?

237. ## spelling

What kind of sentence can you make with the word " whose"?

238. ## Physics

If a shoe is dropped from a height of 40m, what is its speed after falling for two seconds?

239. ## physics

Ayesha exerts a force of 186 N on a lever to raise a 2.70 × 103-N object to a height of 29.0 cm. If the efficiency of the lever is 83.3 percent, how far does Ayesha move her end of the lever?

240. ## MATH

ELLE IS MAKING A PATTERN.SHE IS USING RECTANGLES 1 CENTIMETER WIDE AND 2 CENTIMETERS TALL. WHAT WILL BE THE PERIMETER OF THE SIXTH SHAPE IN THE PATTERN?

242. ## algebra

Annual profit in thousands of dollars is given by the function, P(x) = 12x - 100, where x is the number of items sold in thousands, x ≥ 10. 1.describe the meaning of the number 12 in the formula, in terms of its meaning in relation to the profit.

243. ## English

1. Paul visited me in order to ask for a help. 2. Paul visited me in order to ask for help. (Which one is correct? Do we have to put 'a' before 'help' or not?)

244. ## math-matrix

solve using the gauss-jordan method. x-2y+4z=7 -x+3y-z=-1 2x+y=-2 *I get through the first two columbs, but can't get the third one to the one and zero.

245. ## chemistry - Molar enthalpy

When 10.0 g of KOH is added to 100.0 g water, the solution's temperature increases from (25.18 C) to (47.53 C). What is the molar enthalpy of solution for KOH? i tryed q=(m)x(c)x(delta T) didn't really work. i got 22.35 J do i use that to find the molar

246. ## World History

Can't figure these two out: 35. Rivalry among various sections of a country- ? 38. Bombings and assassinations of high officials by political groups- ? Thanks -MC

247. ## Algebra 2

if one class had 20 students participating in the taste test and each student's rating is represented as ak, how do you write the formula for finding the mean rating using summation notation?

248. ## english

George Washington Carver's work on soil improvement and plant diseases helped the South and its recovery from the effects of the Civil War. Is it a simple, complex, or compound sentence?

249. ## English

1. I took a shower so I felt refreshed. 2. I took a shower so that I felt refreshed. 3. I took a shower, so I felt refrewhed. (What does #1 mean, #2 or #3? In Sentence 1, there is no 'comma' before 'so.' In Sentence 1, we cannot see 'that' after 'so.')

250. ## Math

I am having a hard time understanding the difference between discrete and continuous data...i have read the textbook definition and i have looked online, and i just cannot comprehend it :( help?

251. ## Geometry

Richard is flying a kite. The kite string makes an angle 57 with the ground. If Richard is standing 100 feet from the point on the ground directly below the kite, find the length of the kite string.

252. ## Geometry

An airplane rises vertically 1000 feet over a horizontal distance of 1 mile. What is the angle of elevation? 1 mile = 5,280 ft

253. ## ALGEBRA II

George jogged downhill at 6mi/hr and then jogged back up at at 4mi/hr. If the total jogging time was 1.25 hours, how far did he jog in all?

254. ## spanish

complete the blank with the correct form of verb. Un equpio ___________ y el otro gana. (perder) i know it means one team wins and the other loses i just cant figure out the verb tense

255. ## math

Mary said that the best unit of measure to weigh her cat was ounces.Is she correct? Explain.

256. ## Begley

A person lifts a 4.1 kg cement block a vertical distance of 0.79 m and then carries the block horizontally a distance of 13.30 m. (a) How much work is done by the person in the process? (b) How much work is done by gravity in the process?

257. ## English

I urgently need you to check these sentences on the use of the present perfect. Thank you. 1) I’ve never messaged my friends in another country or posted a message on a message board.I have never missed meals because of the Internet and have never spent

258. ## Finance

A firm has an opportunity to invest in a new device that will replace two of the firm’s older machines. The new device costs $570,000 and requires an additional outlay of$30,000 to cover installation and shipping. The new device will cause the firm to

259. ## geometry

the following coordinates: J(-6, 3), K(-3, 7), L(6, 7), and M(3, 3). What is the perimeter of parallelogram JKLM?

260. ## HELP ON MATH PLEASE!!!!!!!

John jogged downhill at 6mi/hr and then jogged back up at at 4mi/hr. If the total jogging time was 1.25 hours, how far did he jog in all?

261. ## 5g maths

to estimate the adult height of a child you can multiply his hight at age 2 by 2 when he was 2years old about how tall was a 75-inch tall man

262. ## english

after the had reached the museum is this a subordinate or and independent clause?

263. ## physics

1A) A filament lamp- cost- 80p effiency- 0.2 expected life- 1000 hours a compact fluorescent lamp (CFL)- cost- £3.00 effiency- 0.8 expected life- 8000 hours a filament lamp with a power rating of 100W gives 2000 units of light. what power rating would a

264. ## Chem (electronegativity)

Calculate the E°cell for the following voltaic cell (use the standard electrode potentials given on page 829 of the textbook, or from some other source): Ni(s) + 2 Ag+(aq) → Ni2+(aq) + 2Ag(s) ====================== I got -0.55 as my answer. Ecell is

265. ## English

Writeacher, I left out these sentences on the same topics. I included various possibities. Thank you. 1) Sorry, I’ve been out of touch. (Sorry, I haven’t been in touch is the same? How are things with you? Any good news? I’ve been busy with my mum

266. ## algebra

what is this answer I am an even number i am less than 65,but greater than 50 I am divisible by 5

267. ## MATH

MRS. M IS GOING TO PUT DOWN TILES ON HER KITCHEN FLOOR. SHE PLANS TO USE A PATTERN WHERE THERE WILL BE 3 SQUARE TILES FOR EVERY 1 TRIANGULAR TILE. IF SHE USES A TOTAL OF 900 TILES, HOW MANY OF THOSE ARE IN TEH SHAPE OF A SQUARE?

288. ## Chemistry

How many moles and how many grams of potassium alum, KAl(SO4)2 · 12 H2O, can be prepared from 5.00 g of aluminum?

289. ## Math

A ball has a radius of 56mm a)Calculate the surface area b)what is the volume of the sphere could somebody please answer for my math homework I need help

290. ## math

The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material? This is the last question for my homework could u answer this

291. ## Chemistry

Calculate the percent yield of alum if you obtained 75.0 g of potassium alum from 5.00 g Al.

292. ## physics

PLS HELPPPPPPPPP You are camping with two friends, Joe and Karl. Since all three of you like your privacy, you don't pitch your tents close together. Joe's tent is 15.0 from yours, in the direction 26.0 north of east. Karl's tent is 26.5 from yours, in the

If the reaction Cl2 (g) + O3 (g) = Cl2O (g) + O2 (g) occurred in just two steps, what would be the overall order of the reaction be? a. 1 b. 2 c. 3 d. 4 e. not possible to determine from the information given I chose 2 as the answer. Is this correct?

294. ## chem

experimental error is part of any experiment.suggest two possible sources of error on the experiment of the mole ratio of NaCL to that of NaHCO3.

295. ## IUP

A Circular metal loop is 28.0 cm in diameter. how large a current must flow through this metal so that the magnetic field at its center is equal to the earths magnetic field of 5.00*10-5T?

296. ## Microbiology

Nucleoside analogs and ionizing radiation are used in treating cancer. These mutagens can cause cancer, so why do you suppose they are used to threat the disease?

297. ## bio

In 3 or more sentences describe the structure of a water molecule and its unique properties

298. ## geometry

Mr. Horn purchased a cylindrical aquarium for his office. The aquarium has a height of 25 1/2 inches and a radius of 21 inches. What is the volume of the aquarium in cubic feet?

299. ## Physics

the total resistance is 13.0 kΩ, and the battery's emf is 28.0 V. If the time constant is measured to be 34.0 µs . Calculate the total capacitance of the circuit. Calculate the time it takes for the voltage across the resistor to reach 11.0 V after the

300. ## baseball

in baseball they have nine times entrances bases?

301. ## Chemistry

I need to find the volume of 5.44 molar nitric acid needed to completely react with 6.27 grams of Ca(OH)2.

302. ## chemistry

What is the solubility of CaF2 in a buffer solution containing .30 M HCHO2 and .20 M NaCHO2? (Consider the equation CaF2(s) + 2H+(aq)--> Ca2+(aq) + 2HF(aq) and solve the equilibrium problem)

303. ## algebra

Input 7, 8, 9, 10, 11 Output 18, ?, 25, ?, ? Can you help please Thanks

304. ## calculus

x (to the power of 3) + 40 / y - (10 + 3) what is the value of the expression when x=4 and y=8?

305. ## physics

if 12,000 j of work is used to raise a large crate to a 4.1 m high shelf in a warehouse, then what was the weight of the crate of newtons?

308. ## income tax

Hamad is an employee of Mountain Company. He properly completed his Form 1040EZ tax return and was required to pay the IRS $1,244 at the time of filing. He had income tax withholding during the year of$4,782. His tax liability for the year was: A. \$1,244.

309. ## Gen Chem

Consider the reaction: 2 SO2(g) + O2(g) ↔ 2 SO3(g). If, at equilibrium at a certain temperature, [SO2] = 1.50 M, [O2] = 0.120 M, and [SO3] = 1.25 M, what is the value of the equilibrium constant?

310. ## physics

a 70.o kg student runs up a 5.00 meter high stairway in a time of 5 seconds. how many watts of power did she develop?

311. ## math11

The roof of a building is shaped like a square pyramid, with a base of 18m by 18m. If the slant height of the roof is 12m and roofing costs 5.75m2, how much will it cost for roofing material? if the pyramid has 4 sides does each side have 18m?

312. ## physics

A ski trail makes a vertical descent of 77 m. A novice skier, unable to control his speed, skis down this trail and is lucky enough not to hit any trees. If the skier is moving at 17 m/s at the bottom of the trail, calculate the total work done by friction

313. ## microbiology

all coliforms ferment glucose but none of the media used for this test includes glucose why is glucose not used

314. ## Speech

Iambic Tetrameter poem with 8 syllables and 2 stanzas with 4 lines each.

315. ## Microbiology

What if you found gas in the Lab tubes but none in the BGLB thow does this affect the EC test

316. ## Physics

The drawing shows a skateboarder moving at 5.55 m/s along a horizontal section of a track that is slanted upward by 40.9 ° above the horizontal at its end, which is 0.724 m above the ground. When she leaves the track, she follows the characteristic path

317. ## English

Original sentence: The urgent care center offers a variety of services such as physician appointments, mental health, health education programs, and lab and X-ray work. My corrections: The urgent care center offers physician appointments, mental health

318. ## Physics

A skier starts from rest at the top of a hill. The skier coasts down the hill and up a second hill, as the drawing illustrates. The crest of the second hill is circular, with a radius of 38.3 m. Neglect friction and air resistance. What must be the height

319. ## Physics

A student, starting from rest, slides down a water slide. On the way down, a kinetic frictional force (a nonconservative force) acts on her. The student has a mass of 73 kg, and the height of the water slide is 12.0 m. If the kinetic frictional force does

320. ## Speech

Ballad Verse poem with 3 stanzas, 8 lines per stanza and the last line is the same or very similar to the 1st line.

321. ## Physics

A high-jumper clears the bar and has a downward velocity of -6.00 m/s just before landing on an air mattress. The mass of the high-jumper is 50.4 kg. What is the magnitude and direction of the impulse that the air mattress exerts on her? Assume that upward

322. ## Physics

Two identical cars (m = 1350 kg) are traveling at the same speed of 23.9 m/s. They are moving in the directions shown in the drawing. What is the magnitude of the total momentum of the two cars?