# Questions Asked onSeptember 12, 2011

1. ## chemistry

If the amount of mercury in a polluted lake is 0.40 ug/mL, what is the total mass of mercury in the lake? (The lake has a surface area of 100 mi squared and an average depth of 25 ft).

2. ## physics

if a 200-g mass is placed at the 20-cm mark (30 cm from the fulcrum), at what mark should a 500-g mass be placed so that the system balances?

3. ## Chemistry

When 1.0 g of gasoline burns, it releases 11 kcal of heat. The density of gasoline is 0.74 g/mL a) How many megajoules are released when 3.0 of gasoline burns? b) If a television requires 150 kJ/h to run, how many hours can the television run on the energy

4. ## geometry

if EBD= 4x-8, and EBC=5x+20, find x

5. ## statistics

In one elementary school, 200 students are tested on the subject of Math and English. The table below shows the mean and standard deviation for each subject. Mean SD Math 67 9.58 English 78 12.45 One student’s Math score was 70 and the same

6. ## Biology

Please help. Assume that a cell culture has a density of 10^8 cells/mL. You transfer 20 microliters of this culture onto the microscope slide. A) How many cells do you expect will be in this 20 microliters drop you placed under the microscope? B) You add

7. ## statistics

It appears to people who are mildly obese are less active than leaner people. One study looked at the average number of minutes per day that people spend standing or walking. Among mildly obese people, minutes of activity varied according to the N(373,67)

8. ## Pronoun agreement

Are my answers correct? 1. (Points: 2) Neither of the actors has learned (his, their) lines. a. his 2. (Points: 2) Her briefcase and umbrella were missing from (its, their) usual place in the hall. b. their 3. (Points: 2) Company rules require every memo

9. ## chemistryt

Hexane has a density of 0.659 g/ml. How many milliliters (mL) would a student need to pour in order to get 49.5 g of hexane?

10. ## Algebra

A boy can row a boat at a constant rate of 5 mi/hr in still water. He rows upstream for 19 minutes and then rows downstream, returning to his starting point in another 13 minutes. What is the rate of the current? What is the total distance traveled?

11. ## physics

A motorist traveling at 15 m/s encounters a deer in the road 46 m ahead. If the maximum acceleration the vehicle’s brakes are capable of is −7 m/s2, what is the maximum reaction time of the motorist that will allow her or him to avoid hitting the deer?

12. ## physics

a ball of mass 0.1kg makes an elastic head on collision with a ball of unknown mass,initially at rest .if the 0.1kg ball rebounded at one third of its original speed, what is the mass of the other ball?

13. ## physics

At a point high in the Earth’s atmosphere, He 2+ ions in a concentration of 2.8 X 1012/m3 are moving due north at a speed of 2.0 X 105 m/s. Also, a 7.0 X 1011/m3 concentration of O2 ions is moving due south at a speed of 7.2 X 106 m/s. Determine the

14. ## chemistry

what is the balanced equation for xenon gas reacting with fluorine gas?

15. ## chemistry

give the state symbols of the reaction: 2H2 +O2 =2H2O

16. ## Geometry

Point C is the center of the circle. Angle ACB measures56 degrees What is the measure of arc AB? How do you work this out?

17. ## Arithmetic Series - - Reiny

Consider the series defined by Sn = 3n-1 Find the first four terms of the series. How exactly do I do this?

18. ## algebra

write each problem in form ax^p +bx^q p and q are rational numbers [x^2-4x^(1/2)]/2x^(1/3) the answer is 1/2x^(5/3)-2x^(1/6)

19. ## Physics

A. A small plane departs from point A heading for an airport at point B 480 km due north. The airspeed of the plane is 200 km/h and there is a steady wind of 50 km/h blowing northwest to southeast. Determine the proper heading for the plane. B. How long

20. ## United States Government

The United States has this form of government. *representative democracy *monarchy *direct democracy *constitutional republic I think it may be D since a constitutional republic had a government with limited power where the people are the main government

21. ## Math

Determine if it is always sometimes never or always true - ray LJ and ray TJ are opposite rays -the intersection of two planes is a point

22. ## Biology

Please help. Assume that a cell culture has a density of 10^8 cells/mL. You transfer 20 microliters of this culture onto the microscope slide. A) How many cells do you expect will be in this 20 microliters drop you placed under the microscope? B) You add

23. ## College Physics

A roofing tile falls from rest off the roof of a building. An observer from across the street notices that it takes 0.35 s for the tile to pass between two windowsills that are 2.45 m apart. How far is the sill of the upper window from the roof of the

24. ## chemistry

what volume of a 0.272 M solution of HBr is needed for a reaction that requires 49.5 g of HBr? Answer in units of L.

25. ## Math Word Problem

As payment for his daughters yard work, a father agrees to give his daughter an allowance of \$3.50 in the first week of the year with an increase of 50 cents each week until the last week of the year. A) How much money did she receive for an allowance in

26. ## chemistry

balance the equation:C2H6 + O2 = CO2 + H2O

27. ## math

movie tickets cost \$10 for adults and \$8 for children. The total sales form 120 tickets was \$1120. how many adult tickets were sold?

28. ## math

You are a member of a fund raising comittee for your school. The committee is sponsoring a fair. Each member of the committee has agreed to sell 50 tickets to the fair. Student tickets are \$3 each and adult tickets are \$5 each. Let t represent the number

29. ## Physics

A parallel-plate capacitor consists of two square plates 18 Cm on a side, spaced 0.50 mm apart with only air between them. What is the maximum energy that can be stored by the capacitor?

30. ## Geometry

Okay heres the pic. There is a plane with points B,D, and E.those [oints are collinear in the plane. And also outside of the plane is points A, and C. and those points are collinear outside of the plane.thought Line AC intersect at point B of the line

31. ## Math

Which of the following relations has this characteristic: The relation is a function containing two ordered pairs. Reversing the components in each ordered pair results in a relation that is not a function. A) {(0, 2), (0, 3)} B) {(2, 3), (3, 2)} C) {(3,

32. ## Physics

A rocket is launched at an angle of 56.0° above the horizontal with an initial speed of 96 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2. At this time, its engines fail and the rocket proceeds to move

33. ## psychology

A researcher predicts that listening to music while solving math problems will make a particular brain area more active. To test this, a research participant has her brain scanned while listening to music and solving math problems, and the brain area of

34. ## University Physics

A rock is tossed straight up with an initial speed of 20 m/s. When it returns, it fall into a hole that is 8.0 m deep. What is the velocity of the rock (in m/s) when it hits the bottom of the hole? Use -9.80 m/s2 for the local acceleration due to gravity

35. ## Chemsitry 2

a piece of nickel wire has a diameter of 0.568. if the nickel has a density of 8.90g/cc, how long( in meters) should you cut a piece of wire to obtain 0.0234 moles of nickel?

36. ## physics

A pilot flying low and slow drops a weight; it takes 2.9 to hit the ground, during which it travels a horizontal distance of 115 . Now the pilot does a run at the same height but twice the speed. How much time does it take the weight to hit the ground?

Which of the following relations has this characteristic: The relation is a function containing two ordered pairs. Reversing the components in each ordered pair results in a relation that is not a function. A) {(0, 2), (0, 3)} B) {(2, 3), (3, 2)} C) {(3,

38. ## math

By default, your numerical entry is scored as correct if it is within 1% of the correct answer. A rule of thumb is always to enter at least 3 digits for numerical questions. If the correct answer is 7.08809, which of the following entries would be counted

39. ## physics

calculate the work done in lifting a 300N weight to a height of 10 m with an acceleration 0.5m/second square.

40. ## chemistry

during the burning of coal: C + O2 = CO2 if 12g of carbon is burnt in plenty of oxygen,what mass of carbon dioxide is produced

41. ## science

Write exhaustively on the construction of a UV-visible spectrophotometer

42. ## math

Give a formula for the exponential function . The two points marked on the graph are A=(−1−43) and B=(12). The red horizontal line is given by y=5, and is a horizontal asymptote of the function.

43. ## A Dialog Between Dead Men

A Dialog Between Dead Men by Jorge Luis Borges I don't really get what happens in this story. Can someone explain more clearly or give me a link? Thanks!

44. ## Physic =s

A roller coaster travels 17.6 m at an angle of 38.0 ◦ above the horizontal. How far does it move horizontally? Answer in units of m

45. ## chemistry

Determine the empirical formula of a compound that contains 0.171 g of carbon combined with 0.471 g of oxygen.

46. ## chemistry

Determine the empirical formula of a compound that contains 0.171 g of carbon combined with 0.471 g of oxygen.

47. ## Word Problem

A UPS employee, Davis, packs and labels three types of packages: basic packages, business packages, and oversized packages. Business packages take a priority over basic packages, and oversized packages because those customers paid a premium to have

48. ## Calculus

Find the distance traveled in 45 seconds by an object traveling at a velocity of v(t) = 20 + 2cos(t) feet per second.

49. ## Chemistry

Iron reacts with HCl solution to give H2 gas and Fe2+ ions. Suppose that 6.5 g of iron are to be dissolved in 1.4 M HCl. What is the minimum volume (in mL) of the acid solution required to react with all of the iron?

50. ## LA

I read this story called Secret life of Walter Mitty online. Question 1. Does walter undergo any changes as the story processes? is this the answer please check His "secret life" takes him to a world of amazing and fantastic adventures beyond the world of

51. ## Biology

Please help. Assume that a cell culture has a density of 10^8 cells/mL. You transfer 20 microliters of this culture onto the microscope slide. A) How many cells do you expect will be in this 20 microliters drop you placed under the microscope? B) You add

52. ## chemistry

I have been at this question for at least three hours now. Consider the chemical system below. 2 NOCl(g) 2 NO(g) + Cl2(g) K = 1.6 10-5 What is the equilibrium concentration of nitrogen monoxide, [NO], given each of these initial conditions? (a) [NOCl]0 =

asked by Im so sick of this problem
53. ## geography

Name the seven countries that are a part of Central America. My answer is, Belize, Guatemala, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama. Is this correct?

54. ## physics

a ball is thrown up with an initial velocity 20m/s. using g=10m/s2, a) what's the maximum height it can reach. b) what is the magnitude and direction of the ball's velocity 1 second after it is thrown. c) what is the magnitude and direction of the ball's

55. ## spanish

Choose the sentence in which the underlined word is grammatically correct. A. Africa no está tan grande como Eurasia. B. Era amigo de la princesa de India. C. El príncipe está de Sudamérica. D. El río más grande del mundo es en Sudamérica.

56. ## College Physics

A batted baseball is hit with a velocity of 47.3 m/s, starting from an initial height of 8 m. Find how high the ball travels in two cases: (a) a ball hit directly upward and (b) a ball hit at an angle of 70° with respect to the horizontal Also find how

57. ## chemistry

How much energy (in kilojoules) is released when 21.0 of ethanol vapor at 94.5 is cooled to -19.0?

58. ## Biology

Please help. Assume that a cell culture has a density of 10^8 cells/mL. You transfer 20 microliters of this culture onto the microscope slide. A) How many cells do you expect will be in this 20 microliters drop you placed under the microscope? B) You add

59. ## trig

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0

60. ## Math

Okay heres the pic. There is a plane with points B,D, and E.those [oints are collinear in the plane. And also outside of the plane is points A, and C. and those points are collinear outside of the plane.thought Line AC intersect at point B of the line

61. ## Anatomy

I have two question 1.In a dehydration synthesis reaction which of the following occurs a. hydrogen and oxygen are removed from the reactant b. water is added to the reactants c. water is broken down into hydrogen and oxygen d. both a and c I think it

62. ## Math

Write each compound inequality as an absolute value inequality. 1.3 < h < 1.5 Could someone give me the step too? Thanks

Determine whether the following statement makes sense or does not make sense, and explain your reasoning (modified from true/false format of text): If f(x) = 3x, then f^-1 (x) = 1/3x A) This makes sense because the inverse would divide by 3 to "undo" the

64. ## PHYSICS

A roller coaster travels 101 ft at an angle of 45.7 ◦ above the horizontal How far does it move vertically

65. ## College Physics

A batted baseball is hit with a velocity of 47.3 m/s, starting from an initial height of 8 m. Find how high the ball travels in two cases: (a) a ball hit directly upward and (b) a ball hit at an angle of 70° with respect to the horizontal. Also find how

66. ## Physics

After falling from rest from a height of 30 m, a 0.49 kg ball rebounds upward, reaching a height of 20 m. If the contact between ball and ground lasted 2.5 ms, what average force was exerted on the ball?

67. ## Chemistry

a sheet of metal is 97.4 mm wide and 59.4 mm long. if it weighs 9.788g and the density of the metal is 7.23g/cm^3, what is the thickness of the sheet(in mm) ?

68. ## Science

Ibook batteries last for 5 hours What is the independent and dependent variable? What is the control group?

69. ## inglish and spanish

translate spanish to inglish

70. ## University Physics

David is driving at a steady 36.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 1.20 m/s2 at the instant when David passes. How far (in m) does Tina drive before passing David?

71. ## Physics

A cross country team race is about to begin and team Delta decides to use their one-dimensional kinematics knowledge that they learned from their first year physics course. Each team consists of two people and one horse. The clock is started when the team

72. ## chemistry

Determine the empirical formula of a compound that contains 0.171 g of carbon combined with 0.471 g of oxygen.

73. ## physics

a waterfall is 122 m in height. calculate the rise in temperature if all potential lost is converted to heat.

74. ## statistics

A salesperson finds that, in the long run, two out of five sales calls are successful. Twelve calls are to be made. Let X = the number of concluded sales. Is X a binomial random variable? Explain!

75. ## Geometry

Determine if it is always sometimes never or always true - ray LJ and ray TJ are opposite rays -the intersection of two planes is a point

76. ## Science

I have two questions that I need some help with please. 1) Developing a scientific understanding of a natural phenomenon typically begins by A)making a prediction B)Testing a hypothesis C)proving an answer or D) making an obvservation. I'm pretty sure it's

77. ## physics

a ball is dropped from height 10 m. it rebounds to a height of 5m.the ball was in contact with the floor for 0.01s what was its acceleration during contact?

78. ## Physics

A batted baseball is hit with a velocity of 47.3 m/s, starting from an initial height of 8 m. Find how high the ball travels in two cases: (a) a ball hit directly upward and (b) a ball hit at an angle of 70° with respect to the horizontal. Also find how

79. ## physics

The speed of a point on a rotating turntable, which is 0.264 m from the center, changes at a constant rate from rest to 0.902 m/s in 1.94 s. At t1 = 0.64 s, find the magnitude of the tangential acceleration. Answer in units of m/s2 I assumed the velocity

80. ## Algerbra 2

Simplify and show the steps to the problem 4(14x-10y) - 6( y + 4x)

81. ## Physics

A jetliner is moving at a speed of 235 m/s. The vertical component of the plane's velocity is 34.3 m/s. Determine the magnitude of the horizontal component of the plane's velocity. _____________m/s

82. ## Arithmetic Sequence

A child organizes animal blocks in rows on the ground. There are 64 animal blocks in the 5th row & 92 of those blocks in the 9th and last row. Suppose that the number of animal blocks frm row to row form an arithmetic sequence. The number of animal blocks

83. ## Literacy

Please check my work. Thank you. 1. Which of the following is the most direct tool to find books owned by a library you are visiting? A. W i k i p e d i a B. Search engines like G o o g l e or Y a h o o C. Catalog D. Periodical database Answer #1 is B 2.

84. ## geometry

find other endpoint of line segment with a given endpoint and midpoint endpoint (2,1) Midpoint (-7, 2)

85. ## physics

A rock is thrown vertically upward from the ground with an initial speed 15m/s. a. how high does go? b. how much time is required for the rock to reach its maximum height? c. what is the rock's height at t=2.00s?

86. ## ruler

how can say you can use forceps during a science inquiry to pick up a small object place it under the microscope it will appear larger in spanich please

Determine whether the following statement makes sense or does not make sense, and explain your reasoning (modified from true/false format of text): If f(x) = 3x, then f^-1(x) = 1/3x A) This makes sense because the inverse would divide by 3 to "undo" the

88. ## Maths

Find the sum of the following series 8+12+18+as far the 6th term

89. ## Pronoun agreement

Everyone drove (his, their) own car to the scout meeting. a. his b. their My teacher says the Everyone is a singular but this only sounds correct with their.. What is the correct version?

90. ## Physics

A Styrofoam ball of radius 60 cm falls with a terminal velocity of 8.65 m/s. What is the mass of the ball?

91. ## Physics

You step onto a hot beach with your bare feet. A nerve impulse, generated in your foot, travels through your nervous system at an average speed of 106 m/s. How much time does it take for the impulse, which travels a distance of 1.80 m, to reach your brain?

92. ## physics

A rock is thrown vertically upward from the ground with an initial speed 15m/s. a. how high does go? b. how much time is required for the rock to reach its maximum height? c. what is the rock's height at t=2.00s?

93. ## physics

An airplane is flying with a velocity of 86.0 m/s at an angle of 20.0^\circ above the horizontal. When the plane is a distance 119 m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.How far from the dog

94. ## Anatomy

I have a question In a dehydration synthsis reaction which of the following occurs a. hydrogen and oxygen are removed from the reactant b. water is added to the reactants c. water is broken down into hydrgen and oxygen d. both a and c I think it would

95. ## chem

calories need to melt 60.0 of ice at 0 and to warm the liquid to 65 (two steps)

96. ## Geo Hons

Okay heres the pic. There is a plane with points B,D, and E.those [oints are collinear in the plane. And also outside of the plane is points A, and C. and those points are collinear outside of the plane.thought Line AC intersect at point B of the line

97. ## Chemistry

Simplify the following expressions. 15. 5 (5w-4w)/10 17. 6a X 5b^2/3a^3 20. (4f + 13g) (2w)

98. ## Physics

How do you derive the equation for position vs. time from the velocity vs. time equation? For example let's say the velocity equation is v = 0.17t + -0.43 How would I go about figuring out the position vs. time equation with accurate numerical constants?

99. ## English

The lecture was boring, but they took notes anyway. a. Correct b. Faulty

100. ## chemistry

i mean state symbols for the equation: 2Mg + O2 = 2MgO

101. ## problem solving

in a soccer tournament there are 22 entries. the tourney is single mathc elimination. that is 2 soccer teams compete at the same time and the loser is elimnated. how many games will be played to deterenmine chanmpioneship?

102. ## trig

Help find the general solution to:sin^2x-3cosx+sinxcosx-3sinx=0

103. ## basic statistics for the behavioral sciences

on a standard test of motor coordination, a sports psychologist found that the population of a average bowlers had a mean scores of 24,with a standard deviation of 6. she tested a random sample of 30 bowling alley and found a sample mean of 26, a second

104. ## English

I was surprised when the news program told about a new crisis in the Persian Gulf. a. Correct b. Faulty It feels like this question is Faulty. Is it ?

105. ## Physics

The V.A-3 had an average speed of 96 km/h. Its momentum at this speed was 4.8 x 10(4)kg x m/s. What was the mass of the V.A-3?

106. ## chemistry

Calculate each of these equilibrium concentrations based on the reaction below. 2 NO(g) + O2(g) 2 NO2(g) K = 1.71 1012 (a) [NO] = 0.0048 M; [O2] = 0.000057 M; [NO2] = ? (b) [NO] = 0.0026 M; [O2] = 0.000023 M; [NO2] = ?

107. ## geography

Into how many degrees of longitude is the Earth divided? My answer is 360 degrees. Am I correct?

108. ## Chemistry

Can you show me the process that you need to take to balance this basic redox reaction using the ion electron method? Tl2O3(solid) + NH2OH(liquid) --> TlOH(solid) + N2(gas) + H2O(liquid)

109. ## mamagement operation

The city of Beljing is studying it Toursits Information Center. The Information collected about tourists arriving at the center is: interval time ( time between Arrivals)in minutes:(3,4,5,6,7)Probabilty percentage(20.2,23.6,31.2,18.4,6.6) The tourist

110. ## Math Logic puzzle

A farmer has a goat, a wolf, and a cabbage. He wants to transport all three from one side of a river to the other. He has a boat, but it has only enough room for the farmer and one thing. The wolf willl eat the goat if they are left alone together, and the

How do social trends affect business's positively or negatively?

112. ## math

what units are used when talking about area?

113. ## Algebra

Two numbers whose sum is 30 and product is 8800? How do I find that?

114. ## math

what is the different between direct variation and Inverse variation,, pls help i have a quiz tomorrow

115. ## calculus

How do you determine the limit without substitution. ie. lim x--> -2 sqr(x-2)

116. ## math

writing in math Bethany has 40 apples. Write a subtraction story about the apples that would require regrouping. then write the answer in a complete sentence.

117. ## Literacy

Please check my work. Thank you. 1. According to FedStats, what was the number of building permit in 2007? A. 61,617 B. 54,059 C. 496,686 D. 1,500,173 Answer #1 is D. 2. Which of the following is a primary source? A. Newspaper article published in the

118. ## SOCIOLOGY

Will someone suggest websites for the below? Developments in parenting by lesbians and gay men.

119. ## numericals

A 100g bullet is firred from a 10 kg gun with a speed of 1000 m/s.What is the speed of recoil of the gun.

120. ## math

2y+6,3y and y-4 are all integers and y-4 is the median of these intergers which of the following could not be value of y?

121. ## chemistry

what weight of sodium carbonate and sodium bicarbonate are required to make 500 mL of 0.35M BUFFER,pH 9.0 (pKa=9.8)

122. ## science

a sample of metal has a mass of 94.5 grams and a volume of 7 cubic centimeters. what is its density?

123. ## sociology

I am writing an essay about my unique,distinctive and universal characteristics. I started my into and i was wondering if someone good proof read for an errors. Thank you

124. ## World History Honors

Write a series of five journal entries from the point of view of a member of a tribe that has been conquered by the Incas. Make sure that you bring out positive and negative aspects of Inca rule. Each journal entry should be about 200 words.

125. ## physics

A fishtank with inside dimensions of 30.5 cm X 61 cm X 30.5 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms? The fishtank above measures 1 ft X 2 ft X 1 ft

126. ## math

what is the math term with the letters enitmelgens unscrambled

127. ## College Physics

Consider a rock thrown off a bridge of height 78.5 m at an angle è = 25° with respect to the horizontal as shown in Figure P4.20. The initial speed of the rock is 15.6 m/s. Find the following quantities: (a) the maximum height reached by the rock (b) the

128. ## math

A man agrees to pay \$450 per month for 48 months to pay off a car loan. If interest of is charged at 12% compounded monthly, how much did the car originally cost?

129. ## physics

An airplane of mass 2800 Kg has just lifted off the runway. It is gaining altitude at a constant 2.3 M/s while the horizontal component of its velocity is increasing at a rate of 0.86 M/s2. Assume g= 9.81 M/s2. (a) Find the direction of the force exerted

130. ## Ocean

Locations of hot spots remain fixed for a long time. As plates move across such hot spots, they form chains of volcanoes. The Hawaiian Islands are an example of such an island chain formed over a hot spot. Volcanoes on the Island of Hawaii are still

131. ## Chemistry

Discuss in detail, the role played by DNA andRNA in genetic diseases. what are the breakthroughs, if any, in the treatment/management of genectic diseases?

132. ## physics

A fishtank with inside dimensions of 30.5 cm X 61 cm X 30.5 cm is filled with water. What is the volume in cm3 of water required? What is the mass in grams of the water required? What is the mass in kilograms?

134. ## Physics

A total 3.09e6 electrons are placed on an initially uncharged wire of length 1.36 m What is the magnitude of the electric filed a perpendicular distance of 0.417m away from the midpoint wire? I used E=k|Q|/(x(x^2+L^2/4)^1/2) and I got 9.37e16 N/C which is

135. ## algebra2

Write the expression (2x)(4y) + 9x + 10y + (8x)(4y) in a simpler form, if possible. I've tried this problem several times, and have gotten the wrong answer. Someone help?

136. ## government

WHat duties are given to the president in article II of the us constitution?

137. ## English

I left out the following questions. Can you please check them, too? 1) My father works as a lorry driver and I helped him unloading goods from his lorry. 2) I spent the first part of my holiday studying for my make-up exams in Physics and Maths. Then I

138. ## geometry

Points A, B and C are collinear with B between A and C. If AB=3x-4 and BC=4x+7 and AC=12x-12, find the value of x?

139. ## Algebra

How do i graph y-intercept decimal on a graph? y=5x-5/2

140. ## chemistry

S2(s)+H2(g)=H2S(g)

maria has 8 pennies, 7 nickels, 7 dimes, and 7 quaters. how can she divide this amount into 3 groups of equal values? what coins would be in each group?

142. ## Physics

A volleyball is spiked so that it has an initial velocity of 16 m/s directed downward at an angle of 62° below the horizontal. What is the horizontal component of the ball's velocity when the opposing player fields the ball? ______________m/s

143. ## English 12

I need help on paraphrasing "No man is an Island" No man is an island entire of itself; every man is a piece of the continent, a part of the main; if a clod be washed away by the sea, Europe is the less, as well as if a promontory were, as well as a manor

144. ## Calculus

FIND THE LIMIT As x approaches 0: tan 5 x/sin 25 x

145. ## math

If two is company and three is a crowd, what are five and four?

146. ## Chemistry

I am having trouble balancing the following equation using the Ion-Electron Method. Se(solid) + HNO3(aqueous) ----> SeO2(solid) + NO(gas) + H2O(liquid) Can you explain the steps that you have to take to solve it?

147. ## Physics

if the unit of power is the watt (W), and P = Fd/t, show using the result of question (2) and the fact that distance (d) uses units of meters and time has units of seconds. *** question 2. If m represents mass in kg, v represents speed in m/s, and r

148. ## human service

This is my ask I have to answer. explore the existing integration of mediation and advocacy within a human services agency on a national or international level. Where would I find the answer to this. I belive I am not understanding the meaning of

149. ## geography

What is the capital of the country through which the 40 degrees N line of latitude and 20 degrees E line of longitude pass? My answer - Tirana, which is the capital of the country Albania. Am I correct?

150. ## books

discuss the view that oedipus at colonus embodies a profound philosophy about the meaning of life and the mystery of death

151. ## Math

Solve for S: r^2s-5s=7. Solve for b: L= 4a^2b. I'm confused about how to solve these problems. Could someone show me the steps?

Please can you help me to solve and get the solution for these problems. how to get the solution please help me for my homework. question: 1.Find the price of a 10% coupon bond with 10 years to maturity if interest rates: A) increase by 1% B) decrease by

153. ## MATH - Calculus

Evaluate the following limit: e) lim f(x)-f(a) / x - a x->a if f(x) = x^2 + 5

154. ## Physics

Does an object still possess any kinetic or potential energy at absolute zero?

155. ## Physics

A mass (m) rest on a frictionless slope within our physics lab room. The angle of the ramp with respect to the floor is 35 degrees. What is the magnitude of the mass's acceleration?

156. ## Calculus

Use the definition of continuity and properties of limits to show that the function is continues at given a. f(x)=x^2+sqrt(7-x) a=4

157. ## accounting

The fixed cost is 100,000 the price is \$80. a pair the product is 10,000 paris direct labor \$35 a pair, direct material \$30 a pair, total overhead \$15 which adds up to \$80. I dont't know how to start with this, than its asking if outsoucing the price would

158. ## College CHEM

Name for Sn(BrO3)

159. ## Physics

A subway train is designed with a maximum acceleration of ±0.637 m/s2 , which allows for both passenger safety and comfort. (a) If subway stations are 8.6 km apart, what is the maximum velocity that can be obtained between stations? (b) How long does it

160. ## physics

The initial speed of a cannonball is 500 m/s. The acceleration of gravity is 9.8 m/s2. The cannon and target are at the same elevation. If the ball is to strike a target that is at a horizontal distance of 3.7 km from the cannon, what is the minimum time

161. ## physics

A driver traveling at 25 mph in a school zone can brake to an emergency stop in 8 ft. Under similar conditions, what would be the braking distance if the car were traveling at 40 mph?

162. ## Physics

if the unit of power is the watt (W), and P = Fd/t, show using the result of question (2) and the fact that distance (d) uses units of meters and time has units of seconds. *** question 2. If m represents mass in kg, v represents speed in m/s, and r

163. ## Physics

Convert 25 meters to centimeters and gigameters.

164. ## bio 12

you have an orginal populatonof eagles, then humans introduce new eagles in the same area. the new eagles reduce the amountof resources in its home range. what type ofdistrubtion would give the most accuarte assesment of sustainable maximum popualtion. the

165. ## Physics

r vector=(340m, 39 degrees below positive x-axis) What is rx and ry? I have no idea how to do or approach this problem, anyone please help and explain how to do this? Thank you!

If a hole was dug 5 feet deep and 5 feet in diameter, what would be the volume of dirt removed from the hole?

167. ## MS.SUE PLS HELP ME

Please can you help me to solve and get the solution for these problems. how to get the solution please help me for my homework. question: 1.Find the price of a 10% coupon bond with 10 years to maturity if interest rates: A) increase by 1% B) decrease by

168. ## Chemistry

If 1 mg = 10^-3g and 1 Mg = 10^6g, how many milligrams are there in 0.25 Mg?

169. ## Social Studies

How are these facts contribute to life on earth? *Gravity holds the sun together. *The sun is about 4.5 billion years old. *The sun is by far the largest object in the solar system.

170. ## Math

One side of the triangle is 2cm longer than the second side. The third is 3/5 as long as the first side. If the perimeter of the triangle is 24cm, Find the lengths of the three sides.

171. ## Pre-Calc

I know about Descartes Rule but I don't really get how to figure this out-Please check my answers- I don't get this one find number of possible positive and negative real roots of f(x) = x^4-x^3+2x^2 + x-5 I think there are 3 sign changes so there are 3

172. ## Science

You wish to make 1L of sterile lysis buffer soln. that is 10mM Tris-EDTA (pH 8) and 2% SDS. You have plenty of the following stock solns.: 2M Tris-EDTA (pH 8) and 20% SDS. However, SDS cannot be autoclaved and must be added to the soln. after autoclaving

Why do you feel fuller when you eat meat than you eat fruits? This is put with an energy assignment.

174. ## Math

I have a triangle that is 33' X 33' X 33' X 6" deep. How may cubic yards is this?

175. ## Pre-Calc/Trig

Please check the first and help with the second-thank you Find all possible rational roots of f(x) = 2x^4 - 5x^3 + 8x^2 + 4x+7 1.I took the constant which is 7 and the leading coefficient which is 2 and factored them 7 factored would be 7,2 2 factored

176. ## english

compare the island in the opening and closing chapters of the novel lord of the flies.

177. ## medical

how does the musculoskeletal system change from birth to adult? And what are the steps the system goes through from childhood to adulthood to reach 206 bones?

178. ## Chemistry

a girl is celebrating her 7th birthday. each guest is served one large slice of choclate cake, a hamburger, french fries, and some oranges. identify the food groups mentioned above. if one slice of chocolate cake contains 35g of carbohydrate, 15g of fat

179. ## geometry

What value of x would make these pentagons similar? Side A= 21 Side B= 3x-2 Side A'= 15 Side B'= 2x+1

180. ## College Algebra

Did I describe the meaning of this formula correctly, P(x)=12x+10,000? That it is the base amount which is added on to get this result. In other words, by operating generates 10,000. no matter how long it is continued.

181. ## Intervention English

what does descriptive paragraph mean

182. ## statistics

A production process historically produces 95% items that are considered acceptable quality-wise and 5% that are defective.A sample of 50 items is taken. Determine the following probablities: Probability that exactly 47 items will be good.

183. ## math

the side of a square is 2 meters long. what is the area of the square? what is the perimeter of the square in centimeters?

184. ## chemistry

A glass apparatus contains 26.223 g of water when filled at 25 °C. At this temperature, water has a density of 0.99704 g/mL. What is the volume of this apparatus?

185. ## chemistry

what weight of sodium carbonate and sodium bicarbonate are required to make 500 mL of 0.35M BUFFER,pH 9.0 (pKa=9.8..)

186. ## Dimensional Analysis

eLydi wrote 4 1/2 pages of her science report in one hour. What was her writing rate in pages per minute? My answer: ( ihavetwo, tell me which is right, if any are?) answer 1: 0.075 answer 2: 13.33

187. ## College Physics

A cable attached to a block of mass 16.35 kg pulls the block along a horizontal floor at a constant velocity. If the tension in the cable is 9.36 N, what is the coefficient of kinetic friction between the block and the floor? not sure how to do this one

188. ## math

i need to approximate profit in this equation 3. Hot Rocks Music sells CDs. If the profit can be approximated by following equation: , where x represents the number of thousands of CDs sold. Approximately, how many CDs must be sold in order for the company

189. ## physics

during takeoff, an air plane goes from 0 to 360km/hr in 5s. A.) what is its acceleration? B.) How fast is it going after 5 s? C.) How far has it traveled by the time it reaches 50m/s?

190. ## Ms.sue

Is there anyway i can possibly be allowed to post links? I think it would help me out a lot, i could also cite my sources a lot better. Please delete this when were done conversing.

191. ## chemistry

How do I balance this equation. Give the complete or "molecular" equation for the predicted partner exchange reaction. FeCl3 and NH3

192. ## Pronoun agreement

I was surprised when the news program told about a new crisis in the Persian Gulf. a. Correct b. Faulty I would say it is faulty.

193. ## English

Can you please check the grammar in the following sentences? They are all about summer holidays. 1) During my summer holiday I got some work experience as a waitress in a guesthouse in the mountains. I just had to serve food at meals. 2) I worked full time

194. ## morton

124-6*0+15=34

195. ## chemistry

Hypothesis on "behavior of solids on warming".

196. ## physics

Convert 25 meters to centimeters and gigameters.

You have just started work for a small company, FitCo, that develops private fitness clubs in small towns. FitCo buys or leases a local hotel or motel, then renovates to provide a gym, swimming pool, sauna, Jacuzzi, and a small café where patrons can buy

198. ## chemistry

Calculate each of these equilibrium concentrations based on the reaction below. 2 NO(g) + O2(g) 2 NO2(g) K = 1.71 1012 (a) [NO] = 0.0048 M; [O2] = 0.000057 M; [NO2] = ? (b) [NO] = 0.0026 M; [O2] = 0.000023 M; [NO2] = ?

199. ## Physics

A mass (m) rest on a frictionless slope within our physics lab room. The angle of the ramp with respect to the floor is 35 degrees. What is the magnitude of the mass's acceleration?

200. ## English

Can you check these sentences about summer holidays? Thank you. 1) When I was at the seaside, I usually bathed twice in the mornings. (went for swims). 2) I pushed my child on a swing and I watch him going on a slide. When I was at the swimming pool, I

201. ## Calculus

Find lim x->-3+ x-3/x^2 -9 =? I'm really confused on this concept.

202. ## science

A 63 kg boy and a 44 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 1.7 m/s 2 , determine the magnitude of the acceleration of the boy toward the girl

203. ## translation

how can say you can use forceps during a science inquiry to pick up a small object place it under the microscope it will appear larger in spanich please

204. ## science

Which of the following would result in the greatest erosion? A) creek flowing down a hill B) water sitting in a lake C) rain soaking into the ground D) large river flowing down a mountain

206. ## Pre-Calculus

Using the difference quotient to find M-sec for h=0.5 at x=1. f(x)=2x+5 difference quotient-f(x+h)-f(x)/h

207. ## Algebra 2

Solve equation and show steps, explain, and i would like to thanks mrs. sue, who answered my last question, and i would like to thank in advanced whoever answers this question :)

208. ## Physics

Convert 25 meters to centimeters and gigameters.

209. ## physics

Find the density in g/cm3 of a 120 cm3 piece of metal having a mass of 2 kg.

210. ## math

how do you find an outlier and tell how it affects the mean with these numbers? -13,-16,-12,-16,-3,-14 and with these numbers 28,12,37,36,30,32,35?

asked by SJH all the way_<3
211. ## Math

FACTOR COMPLETELY 6abcx^2-42abcx-468abc

212. ## SIENICE HELP!!!!

What would cause the most erosian? A)a small amount of water moving over a steep slope B)a small amount of water moving over a flat area C)a large amount od=f water moving over a steep slope D)a large amunt of water moving over a flat area My answer is

213. ## science

How do you calculate the gravity of an object? equation needed h=1/2 gt^2 Solve the equation for g; g=2h/t^2 Set height is 2 foot, dropped small object from 2ft, timed at 0.3 seconds. Calculate the gravity of the object. Is this right? 2=1/2*9.8 t^2

214. ## Math

A car covers 2924 km in 43 hrs. What is it's speed

215. ## math

M less than 1 equals 43

216. ## math

Man 6 feet tall cast shadow 15 ft long. Girl is 5 ft. 10 inches how long will her shadow be

217. ## science

What is the effect of the type of alcohol (methanol, ethanol and pentanol) on the evaporation time?

218. ## PHYCIAL SCIENCE

THE DISPLACEMENT PER unit time?

219. ## physics

The ball is thrown with an initial speed of 3.7 m/s at an angle of 15.4° below the horizontal. It is released 0.83 m above the floor. What horizontal distance does the ball cover before bouncing?

220. ## English

Thank you very much for your corrections. I checked my mistakes but I have some more doubts. 1) During our stay in London we were accomodated (we stayed) in a three-star hotel. 2) We had breakfast and dinner at the hotel and we were free to have lunch

221. ## Science

How does adding X-ray radiation affect the growth of rose bushes. What I need is the experimental group the control group the independent and the dependent and a reason why.

222. ## PHYSICS

A person walks 11.2 ◦ north of east for 4.06 km. Another person walks due north, then due east to arrive at the same location. How far due north would this person walk? Answer in units of km

223. ## Physical Science

Kinematic--v = v0 + at and Energy--½mv2 = mgh. Solve both equations for v. Time was 00.6 Measured from 2ft. What is the Velocity in m/s kinematic and the Velocity in ft/s energy

224. ## math

what are the common factors of 9and75

225. ## English

I have a few more doubts on your corrections. Thank you!! 1) Is it wrong to say "wipe the blackboard with a duster" or is only "clean" possible? 2) "do a course" is a mistake? you can only say "take/attend a course? "take a tour, go on a tour, make a tour"

226. ## arithmetic

If you treat the day of the month as a number (March 12th is the number 12, April 4th is the number 4), what is the average value of the numbers that represent the 6 Tuesdays that fall after September 12, 2011?

227. ## social studies

Did the North or the South have an increase in railroad construction during the Civil War? I think the North did. The section in our book where we are suppose to find the answer is not very clear.

228. ## education

How can a digital camera and a digital projector be used in a classroom to increase students' needs or increase teacher efficiency.

229. ## physics

The speed of a point on a rotating turntable, which is 0.264 m from the center, changes at a constant rate from rest to 0.902 m/s in 1.94 s. At t1 = 0.64 s, find the magnitude of the tangential acceleration. Answer in units of m/s2 I assumed the velocity

10+4(m+2)

231. ## General

Can someone tell me a good search engine?

232. ## physics

Two cars both travel at 25km/kr collide into each other, assuming both have same masses. What would happen to the fly which is flying in the mid-way?

what are 7 ethical guidelinces (laws, acts or executive orders) I can research?

how would a drought effect Florida's orange economy?

235. ## SIENICE HELP!!!

Where along a river does deposition most often occur? A)along the manks B)at the mouth C)in a tributary D)in a meander My answer is B,am i right?

236. ## math

explain how you can find the difference using mental math then name the difference

237. ## Comp 156

What might you do to provide yourself with the best opportunity to succeed when writing your college papers?

238. ## English

I was wondering if someone can help me figure out what point the author is making in "On the Pleasure of Hating" by William Hazlitt. And what a good quote from his On the Pleasure of Hating" to use is.

239. ## governement

any criticism or support the American news is saying about the government.

240. ## English

What are the ways of getting acquainted?

What is the perimeter of a rectangle with a length of 4 2/3 inches and a width of 3 1/3 inches

242. ## nursing evidence

_ _ _ _ _ _ _ _ _ 1. Information used to conduct our lives _ _ _ _ _ _ _ _ _ 2. To solve a problem by collecting the necessary pieces of information and putting them together _ _ _ _ _ AND _ _ _ _ _ 3. Try several approaches until one works _ _ _ _ _ _ _ _

243. ## math

what is the square root of 20?

244. ## chemistry

state symbol for 2Mg

245. ## English Book

Does anyone know where I can read The Perfect Picture by James Thom online? for free of course.

246. ## Science

I need to know what cell is abundant in pus and I have looked but was wondering if a neutrophils is a cell? Can someone give me a link please? Thanks

247. ## geography

Which continent is smaller in area than Europe? My answer is - Australia is smaller. Is this correct?

248. ## english/folkolore

reading shepherd of the hills "i'd see him freeze in hell before id take his orders" is an example of what?

249. ## Math, topology

How do I figure out this question...a farmer has a square field containing 11 oak trees. She wants to divide the field into 11 enclosures so that each has one shaded tree for her cattle. Divide the field using four straight lines to indicate where the

250. ## French

How many ways can you use Avoir? I know there is different ways, but im not sure of all of them.

251. ## College Physics

A person riding a bicycle on level ground at a speed of 10.6 m/s throws a baseball forward at a speed of 19.1 m/s relative to the bicycle at an angle of 41° relative to the horizontal (x) direction. (a) If the ball is released from a height of 1.3 m, how

252. ## physics

Find the density in g/cm3 of a 120 cm3 piece of metal having a mass of 2 kg.

253. ## cook

what is the excess in fat?

254. ## Chemistry

Armes determines that the side of a cube measures 7.100 cm exactly. What is the appropriate value for the volume of the cube?

255. ## math

simplify: -8+c+(-10) simplify: -12-w+20 simplify: -3(2y-9)+y

Does (4+5) + 2 = 9+2? Explain

257. ## Legal Studies: Queensland/Australia

Hi beautiful people I need help incorporating the Police Powers and Responsibilities Act OR the Queensland Criminal Code into an argument about victimless crime. My two issues are currently the role of paternalism in the legal system and at what point the

258. ## Math

What is dimensional analysis and how do you use it?

259. ## Physics

Convert 25 meters to centimeters and gigameters.

260. ## immunology

what is meant by natural immunity to parasites?

261. ## algebra

5/(2x+1)^2 - 3/(2x+1)=2

262. ## Math

How do you find the limit of 7 as x approaches 8, using inspection?

project

264. ## essay

What should you consider when looking for helpful sources? What are some red flags that indicate you should avoid a particular source?

265. ## science

Why do you feel fuller when you eat meat than you eat fruits?

267. ## math

Researchers discovered a large group of krib that was more than 30,000 feet long. About how long is 30,000 feet, measured in the number of krill?

268. ## Pre-Algerbra

Need answers to the following, 1. 1/2-2/3 2. -1/6-1/2 3. -1/2divided by 2 1/2

269. ## english

hi I need help with an english question. Compare the island in the opening and closing chapters of the novel lord of the flies. About half a page

270. ## math

researchers discovered a large group of krill that was more thatn 30,000 feet long. About how long is 30,000, measured in the number of krill? Adult Antarctic krill are about 2 inches long.

271. ## English

In a way, you are connected to someone else. How can I make this less broad and more specific please and thank you

272. ## math

explain how you can tell without multiplying that 700 * 60,000 and 7,000 * 6,000 have the same value.

273. ## Government US

Scalia says that the Constitution is a fundamental exception from (or to) 1. the wishes of judges. 2. the interests of minorities. 3. the rule of law. 4. democracy. I would say Interests of minorities?

274. ## Algebra 2

last question, what is the most affective way to solve for slope when involving ordered pairs, ex. (8,-9) (2,-1) i learned this in class today, but information doesn't stick well in my head :)

275. ## math

what is the product of 93 and 23

276. ## Government US

Justice Breyer advocates using values rather than _____ to interpret the Constitution. 1. precedent 2. content 4. details My answer will be Content-2 what say?

277. ## Math

Sorry if you spend \$4 every 7 mins, in 9 days you'll spend how much

278. ## Math

Find the Limit of x->1+ x^3 + 1/ x - 1 =? Please help and explain, I'm really lost.

279. ## math

what does division mean?

280. ## math

suppose a penguin eats about 5 pounds of krill a day. about what number of krill does the penguin eat in 100 days? (hint: 1 pound =16 ounces.)

281. ## dentistry or health

when you lift up your tongue, and you see this red bump, what is it, and how do you get it away?

282. ## math

8 pennies 7 nickels 7 dimes and 7 quarts into 3 groups

283. ## english

which of these word groups are punctuated correctly, it rained every day of our vacation nevertheless we had a wonderful time

284. ## sensitity analysis

Explain how you may use a trend analysis to plan for staffing at patton-fuller hospital

285. ## Algebra

Two numbers whose sum is 30 and product is 8800? How do I find that?

286. ## scientific method and measurement 8th Hons science

what allows results to be verified to maintain credibility?

287. ## Easy English

does a sentence go like this: ". or like this? ."

288. ## math

decimal value for 1/11

289. ## maths

can we mark 2 or more points common to two angles

290. ## LA

which narrative uses "we" 1st, second or 3rd

291. ## UOP

(1/15abc)*(5a^3b^5c^2)

292. ## math

suppose a penguin eats about 5 pounds of krill a day. about what number of krill does the penguin eat in 100 days? (hint: 1 pound=16 ounces) 30 antarctic krill weigh about 1 ounce altoghter.

293. ## science

a science acrostic full sentencess help!!

294. ## vocabulary concepts facts

to find half of a number the number by2

y/5 (10-x)

297. ## algerbra 2

-3x(squared 2)-6x=0

298. ## fractions

write the following fractions in increasing order 45/44 5/4/and 8/13