# Questions Asked onNovember 22, 2014

1. ## Physics

A 4.0-kg cylinder of solid iron is supported by a string while submerged in water. What is the tension in the string? The density of iron is 7860 kg/m3 and that of water is 1000 kg/m3. A) 34 N B) 2.5 N C) 24 N D) 40 N E) 20 N

2. ## Stats

In the past, the mean running time for a certain type of flashlight battery has been 9.8 hours. The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean running time has

3. ## chemistry

A certain reaction is spontaneous at 72˚C. if the enthalpy change for the reaction is 19Kj/mol, what is the minimum value of ΔS (in J/K•mol) for the reaction?

4. ## physics

Consider a very small hole in the bottom of a tank that is 17.0 cm in diameter and filled with water to a height of 90.0 cm. Find the speed at which the water exits the tank through the hole. A) 48.3 m/s B) 44.1 m/s C) 17.64 m/s D) 4.20 m/s

5. ## chemistry

In a certain experiment a student finds that the PHs of 0.10 M solutions of three potassium salts KX, KY, and KZ are 7.0, 9.0, and 11.0, respectively. Arrange the acids HX, HY, and HZ in order of increasing acid strength.

6. ## Physics

A 4 kg bundle starts up a 30o incline with 128 J of kinetic energy. How far will it slide up the incline if the coefficient of friction between bundle and incline is 0.30? Pls help me solve this, I don't know what formula to use...

7. ## Chem

Define isoelectronic series. Put the K+, Ca2+, Cl-, and Ar ions and atoms in order of increasing size and explain the trends. Count the number of electrons for each atom Then, explain the (column) size trend for Mg2+ versus Ca2+ ions Is the order cl k ca

8. ## physics

When a container of water is placed on a laboratory scale, the scale reads 120 g. Now a 20-g piece of copper (of density 8.9 g/cm3) is suspended from a thread and lowered into the water, not touching the bottom of the container. What will the scale now

9. ## Statistics

4. The Graduate Record Exam (GRE) has a combined verbal and quantitative mean of 1000 and a standard deviation of 200. Scores range from 200 to 1600 and are approximately normally distributed. For each of the following problems: (a) draw a rough sketch,

10. ## chemistry

In a group 1 analysis, a student adds hydrochloric acid to the unknown solution to make [Cl-] = 0.15 M. Some PbCl2 precipitates. Calculate the concentration of Pb2+ remaining in solutions.

11. ## statistics

A multiple-choice test consists of 29 questions with possible answers of a, b, c, d. Estimate the probability that with random guessing, the number of correct answers is at least 14. z-value (Use continuity correction)= Probability=

12. ## Physics

A roll of toilet paper (a partially hollow cylinder with R_2 = 7.5cm, M = 300g, and I = 9.0 x 10^-4 kg m^2) is mounted on a mass-less axle along its central axis. Te roll is initially at rest. Then, at t=0, a child grabs the end of the roll and starts

13. ## chemistry due soon

Which of the following phrases can describe an endothermic process? A. A system gives off energy as it cools down. B. Energy is released in forming the bonds of the product molecules in a reaction. C. The net energy change for a reaction is positive. D.

Two objects A and B have the same mass and the same specific heat. Object A is heated from 30°C to 70°C and object B is cooled from 70°C to 30°C. How are the thermal energies of the two objects related after the temperature change has occurred? A. The

15. ## chemistry Thank a lot help

100ml of h2s04 solution having molarity 1M and density 1.5g/ml is mixed with 400ml of water. Calculate final molarity of h2s04 solution if final density 1.25g/ml. 50ml of 20.8% bacl2 and 100ml of 9.8% h2s04 solution are mixed. Molarity of cl ions in the

In the reaction AgNO3(aq) + HCl(aq) AgCl(s) + HNO3(aq) + heat, when 0.70 mole of AgNO3 and 0.70 mole of HCl react, the temperature of 50 g of water increases from 15°C to 30°C. If the specific heat of water is 4.18 J/g•°C, how much energy was produced

17. ## Chemistry

Which of the following chemical reactions is an example of an endothermic reaction? A. Making ice cubes from liquid water B. Burning a candle C. The evaporation of water D. The combustion of gasoline I think c

18. ## statistics

An airline company is considering a new policy of booking as many as 182 persons on an airplane that can seat only 160 (Past studies have revealed that only 80% of the booked passengers actually arrive for the flight.) Estimate the probability that if the

19. ## physical chemistry

Please prepare 0.5L of 1.2M HCl in 50% (v/v) aqueous methanol. The details of HCl are as follows: Hydrochloric acid: Purity : 36%-38% Density : 1.18g/mL Physical state : liquid Molecular weight : 36.42 g/mol Describe the procedures and apparatus you need

20. ## Physics

Aqua dude can swim at a speed of 2.0m/s in still water. A river is 48 m wide and has a current of 1.5 m/s [E]. He starts at the Southbank and swims so that he is always headed directly across the river. A) what is Aqua dudes velocity relative to the shore?

21. ## Math

Round to the nearest hundredths 23.456

22. ## english

English I part II GP Final – Exam 4

23. ## algebra

You deposit $3000 in an account earning 7% interest compounded continuously. The amount of money in the account after years is given by A(t)=3000 e^(0.07 t) . How much will you have in the account in 5 years?$ Round your answer to 2 decimal places. How

24. ## Chemistry

Calculate the S(univ) for the following phase change at 25 deg celcius. The boiling point of heptane is 98.0 Celcius and has a Delta Hvap= +21.6kj/mol. C7H16(l)--> C7H16(g) Delta S= +79.0j/k I know that the equation is Delta Suniv= DSsys + DSsurr but for

25. ## Physic

Two wave pulses on a string approach one another at the time t = 0, as shown in the figure below, except that pulse 2 is inverted so that it is a downward deflection of the string rather than an upward deflection. Each pulse moves with a speed of 1.0 m/s.

26. ## statistics

What is the relationship between Sample Size and the width of the Confidence Interval? Please explain further as to why. I understand the relationship, but I can't figure out the why

27. ## physics

The acceleration of gravity is 9.8 m/s2 . What is the magnitude of the total force on a(n) 75 kg driver by the dragster he operates as it accelerates horizontally along a straight line from rest to 66 m/s in 4.5 s? Answer in units of kN

28. ## mathematics of investment

on what day will 8,000 earn 180 interest when invested on April 25, 2002 at 9% simple interest? use ordinary interest and actual time.

29. ## physics

A skier of mass 70.4 kg, starting from rest, slides down a slope at an angle $\theta$ of 36.8° with the horizontal. The coefficient of kinetic friction is 0.14. What is the net work, i.e. net gain in kinetic energy, (in J) done on the skier in the first

30. ## Chemistry

Calculate the volume of concentrated reagent required to prepare the diluted solution 17 M H3PO4 to prepare 939 mL of 6.7 M H3PO4

31. ## Art History

In linear perspective, all parallel lines converge at a(n): A. orthogonal. B. vanishing point. C. horizon line. D. picture plane. OK, my textbook says it both A and C so I am totally confused.

32. ## Chemistry

A student was given a 2.45 g of impure potassium sulfate (K2SO4) sample. He dissolved this sample in 100 mL of water first and then added some barium chloride (BaCl2) solution. A 2.15 g of BaSO4 precipitate was obtained at the end of the reaction. What is

33. ## chemistry

I have to calculate the ΔV= final volume-initial volume For the first trial the final volume was .005mL the initial volume was .03mL, which equaled to -.025mL. The volume was negative because it was exothermic reaction. For the second trial the final

34. ## chemistry

Poly(methyl methacrylate) (PMMA), more commonly known as acrylic glass.Draw the monomer, given that this polymer forms by addition polymerization. Include all H atoms.

35. ## Biology

How do the two ATP molecules charge the glucose molecule in glycolysis?

36. ## The Odyssey and Orestia

Hi. I need some help with a few questions regarding The Odyssey and Orestia. (I have eliminated some of the possible choices because I know they are incorrect) 1.How are the endings of both the Odyssey and the Orestia similar? A.In both cases, the goddess

37. ## physics Pls help

A piece of glass has a temperature of 87.0 °C. Liquid that has a temperature of 32.0 °C is poured over the glass, completely covering it, and the temperature at equilibrium is 57.0 °C. The mass of the glass and the liquid is the same. Ignoring the

38. ## Chemistry

Rates of Reactions I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips. Variables:- -Independent: the mass of marble chips -Dependent: The volume of gas

39. ## algebra

16. Solve y = log3243. A. y = 0 C. y = 5 B. y = 3 D. y = 243 3. Which of the equations below describes the graph shown here? A. y = x – 2 C. y = –x + 2 B. y = x + 2 D. y = –x – 2 11. If the triangles in the following figure are proportional, what

40. ## Chemistry

Rates of Reactions I am conducting a experiment on increasing the rate of a reaction by increasing the surface area. For this I am reacting hydrochloric acid and marble chips. Variables:- -Independent: the mass of marble chips -Dependent: The volume of gas

41. ## Excel

I know how to insert error bars in the bar graph on Google spreadsheet, but for some reason I couldn't, due to the drop-drown of the series section consisting of only column 1 and not the other.How can i fix this problem?

42. ## Art History

Which is the inspiration for the Farnese ceiling? A. Michelangelo’s Sistine Ceiling B. Bernini’s Cornaro Chapel C. Gaulli’s frescoes in Il Gesu D. Mantegna’s Camera Picta I think it's A, but not certain

43. ## Calculus

For f(x)= (x+3)^2/(4x-5) find all x such that f(x) increases.

44. ## science

which of the following is a characteristic of karst topography? a. caverns b. glaciers c. alluvial fans d. dunes

45. ## algebra

If a 2 cubic feet of sand weight 90 pound, how much do 5 cubic feet of sand weight?

46. ## chemistry

What is the purpose of a calorimeter? A. To determine the temperature of a chemical reaction B. To determine the energy changes of a chemical reaction C. To identify the specific temperature of an unknown substance I think the answer might be c

47. ## jm

need how to do English I part II GP Final – Exam 4

48. ## culture

What culture would someone have if they live in Missouri

49. ## uconn

calculate delta h delta s and delta g for the transfer of methan from a non-polar solvent to water at 298 kelvin temperature.

50. ## Chemistry

Hf < 0 implies which of the following? A. The temperature decreases B. The temperature remains the same C. A bond-forming process D. A bond-breaking process I think the answer is a.

51. ## algebra

If there are 560 calories in 8 ounces of meat, how many calories are in 3 ounces of meat?

52. ## Chemistry

If 35.0 mL of 0.210 M HCl reacts with excess Mg, how many mL of hydrogen gas are produced at STP? Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) Is the answer 2.352 STP converted mols HCl to mols H2 gas: 02.10 M HCl x 1 mol H2/2 mol HCl = 0.105 mol H2 converted

62. ## Economics

An industry has only two firms producing outputs y1 and y2, respectively. The first firm has a cost function of TC(y1) = 20 + 20y1 and the second has a cost function TC(y2) = 10 + 5y2 + y22. The demand function for the product these firms make is Q = 120 -

63. ## math

a vertical flagpole casts a shadow of 12ft long at the same time that a nearby vertical past 8ft casts a shadow 3ft long. Find the height of the pole

64. ## Economics

An industry has only two firms producing outputs y1 and y2, respectively. The first firm has a cost function of TC(y1) = 20 + 20y1 and the second has a cost function TC(y2) = 10 + 5y2 + y22. The demand function for the product these firms make is Q = 120 -

65. ## maths

How do You write 22nd november 2014 in 5 letter without using numbers

66. ## Math

The fourth term of A P is 37 and the 6th term is 12 more than the fourth term.find the first and the seven terms

67. ## algebra

the ratio of the weight of an object on jupiter to its weight on earth is 8 to 3. how much would a 100 pound person weigh on Jupiter? i`ll tell you the answer when am done solving so you can check if am right

68. ## English

1. Let me call roll to make sure you're all here. 2. Let's decide the turns first. Who would like to go first? 3. Could you please fetch it from the staff room? 4. Could you please fetch it from the teachers' room? 5. Could you please fetch it from the

69. ## Maths

In a bag there are a number of red and blue balls. The ratio of red to blue balls is 3:7. I add 10 balls and the ratio goes to 6:7 red to blue balls. How many blue balls are there? 3n + 7n = 10n (3n+10) + 7n = 10n + 10 6n + 7n = 10n + 10 13n = 10n + 10 3n

70. ## science

If there is a block of cheese with a volume of 1200 cm, and a mass of 2 kg (2000 g) what would be its mass-to-volume ratio be in g/cm3?

71. ## Math

A ball rebounds the ground to a height of 72 cm, and each time it rebounds to two thirds of the height. Estimate the total distance the ball travels before it comes to rest

72. ## Math

Find the angle between the vectors u and v if u= and v=, and Round answer to two decimal places. I found that it is (12*sqrt13)/65, my point of confusion is how do I find the angle?

73. ## Math

I also need help with Find the component form of v if absolute value of v=2 and the angle it makes with the x-axis is 30 degrees. I cannot find a book example. help me.

74. ## Algebra

I'm studying for a test so I want to make sure I'm doing these problems right. Numerator (-5a exponent -2) Denominator b3 All to the -1 exponent For a= -4. And b=2 My answer I get is 1/10 is the right ? -16 with -1/2 exponent Would the answer be -4? 2-3

75. ## statistics

Describe whether the following study would most likely be “observational” or “experimental”, and why it would be so. A survey examines the preferences for laundry detergent. ***The admissions office wants to estimate the cost of textbooks for

76. ## Life-Span Development

I need for someone to check my questions letters that I match up to the answers that I chose Here are the questions 1. Concrete Operational Stage (I chose d) 2.Egocentrism (I chose i) 3.Formal Operational Stage (I chose h) 4.Influences on the Development

77. ## Principles of Public Speaking

When researching for supporting materials about the impact of violence in the media, it is a good idea to get assistance from this resource. A. Television B. Call-in radio C. Librarian D. Personal Interview

78. ## word problem

suppose a car rental charges 94 dollars for the first day and 44 dollars for each additional or partial day.let S(x) represent the cost of renting a car for x days .find the value of S(5.5)

79. ## Calc

Suppose that we want to estimate the area under the graph of f(x)=X^2+x for x=1 and 3. What is the value of the estimate using four rectangles and taking the sample points to be left-hand endpoints?

80. ## Fencing Applicatio

Suppose you want to install a new fence. Frank's Company quotes you a price to install a new fence given by a formula where P(f) is the dollars and f is the number of feet of fencing needed. f P(f) 0 500+20.(0)=500 25 500+20.(25)=1000 50 500+20.(50)=1500

81. ## algebra

the last 10% of CRYPTOGRAM II DON'T GET THIS????

82. ## calc

f"(x)=10, f'(x)=3 f(0)=1/3 find f(1)

83. ## Science

changes in the carbon cycle cause global temperatures to rise how might this affect the water cycle

84. ## Math

Resolve in partial fractions (x+6)/((x^2+1)(x-2)^2) Using let x = ...

85. ## Social Science

Where can I find information on the difference between English policing and American policing, without using wikipedeia? I found some information but is not showing a difference. Thank you

87. ## economics

2. Your state has a retail sales tax of 10 percent but it exempts food, prescription drugs, and all services including housing services, repair services, and consumption of electricity and other public utility services. Use supply-and-demand analysis to

88. ## Algebra 2

Quadratic systems x^2+y^2=10 2y+y=4 the first part I got this x^2+(4-2x)^2=10 and I don't know what steps comes next. could you show work on how to do it I'm so confuse on this problem.

89. ## mechanics

A stone is thrown vertically up from the top of the tower 40m high with the velocity of 20m/s. 3 seconds later another stone is thrown vertically up from the ground with the velocity of 30m/s.Calculate when and where the two stones will meet from the foot

90. ## economics

What is the effective marginal tax rate of a government antipoverty program that guarantees every family a minimum income? Explain. Why might trying several antipoverty benefits to income level lead to an effective marginal tax rate of greater than 100

91. ## physics

A skier of mass 70.4 kg, starting from rest, slides down a slope at an angle $\theta$ of 36.8° with the horizontal. The coefficient of kinetic friction is 0.14. What is the net work, i.e. net gain in kinetic energy, (in J) done on the skier in the first

92. ## physics

A skier of mass 70.4 kg, starting from rest, slides down a slope at an angle $\theta$ of 36.8° with the horizontal. The coefficient of kinetic friction is 0.14. What is the net work, i.e. net gain in kinetic energy, (in J) done on the skier in the first

93. ## maths

If the cost of 2 score pens is 280, then the cost of 2 dozen pens will be?

94. ## Science

what is an uncertainty? From reading the internet, is it a way to express potential error and that the actual value is between +/-#? what would be the uncertainty for this: electronic balance measuring to the tenth of a gram? is it +/- 0.05?

95. ## Science

uncertainty for a tenth of a mm?

96. ## Chemistry

What is the mass of a sample of (NH4)2SO4 that contains 8.01 x 10^24 atoms of oxygen

97. ## Chemistry

If I had a question about complex ions and the problem had a "mixture" of two compounds, how would I know if one of the products formed is going to be a solid or liquid? I know there are solubility rules, but is there something else you can use to tell?

98. ## Chemistry

I have an assignment. It has two boxes to model the particles of the same gas at different temperature (18 and 45 degrees Celsius). I have to write two or three sentences relating the temperature, the average kinetic energy, and the motion of the particles

99. ## math

4/3 times 3/4

100. ## English

i have to write a literary analysis on Romeo and Juliet. This what i did so far, In the story ‘Romeo and Juliet’, Romeo wanted to live happily with Juliet despite the hatred between their families. "Here's much to do with hate, but more with love," he

101. ## math

4/5 times 3/4

102. ## Physics

A water tank is filled to a depth of 10 m, and the bottom of the tank is 20 m above ground. A water-filled hose that is 2.0 cm in diameter extends from the bottom of the tank to the ground, but no water is flowing in this hose. The water pressure at ground

103. ## math

1/3 divided by 5/8

104. ## maths

what is the sum of 13th and 56th term

105. ## maths

product of 6th and13th term

106. ## accounting

which is an operating expense a salaries expense b payroll expense

107. ## Math

Hello i am doing assignment in my math 20-2 class. The question is: data collected of cars passing on the road revealed that the average speed was 90 km/h with a standard deviation of 5 km/h and the data which is normally distributed a policeman is

108. ## chemistry

Draw the three alkenes, each of formula C5H10, that will form 2-methylbutane upon hydrogenation.

109. ## physics

A spy in a speed boat is being chased down a river by government officials in a faster craft. Just as the officials’ boat pulls up next to the spy’s boat, both boats reach the edge of a 4.5m waterfall. The spy’s speed is 16 m/s and the officials’

110. ## Algebra

Please help me to solve this Radical Expressions and equations word problem. Here is the question: Surveying. The length of each lot line of a swimming pool complex is shown. Find the exact perimeter of the irregular shaped lot. Then approximate the

111. ## Algebra

Please help me to solve this Radical Expressions and equations word problem. Here is the question: Find the perimeter and the area of the rectangle. Here are the measurements: length is (sqrt 6+2) and the width is (sqrt 6-2)

112. ## Chemestry

What volume of 0.140 M K2Cr2O7 will be required to oxidize the Fe2+ ion in 81.5 mL of 0.176 M FeSO4 solution? Cr2O72- + Fe2+ Cr3+ + Fe3+ (acid solution)

113. ## statistics

Hello i am doing assignment in my math 20-2 class. The question is: data collected of cars passing on the road revealed that the average speed was 90 km/h with a standard deviation of 5 km/h and the data which is normally distributed a policeman is

114. ## Living a Healthy Life

The most effective way to prevent carbon monoxide poisoning is by A. heating buildings with oil or electricity. B. installing and maintaining carbon monoxide detectors. C. keeping an adequate supply of breathing masks at hand. D. remaining alert to the

115. ## Living a Healthy Life

A child's ability to jump for distance is an example of A. flexibility. B. explosive power. C. reaction time. D. agility. B.

116. ## English

What are the benefits of having a first person narrator in The Fall of The House of Usher by Edgar Allan Poe What is the significance of the lake, fissure in the wall, and Usher's sister in the short story?

117. ## Living a Healthy Life

What are the three methods by which HIV and AIDS are usually transmitted? A. Breastfeeding, sexual intercourse, and shared blood B. Air, water, and shared bodily fluids C. Skin contact, sexual intercourse, and shared clothing D. Sex, food, and drink A.

118. ## Living a Healthy Life

The National Association for the Education of Young Children recommends a minimum of _______ square feet of usable floor space per child. A. 50 B. 10 C. 35 D. 45 C.

119. ## Chemistry

It takes 37.16 mL of 0.510 M HCL to neutralize 25.00 mL of NaOh. What is the concentration of the NaOH?

120. ## Art History

Where did Gothic Architecture begin? A. Île-de-France B. Burgundy C. Tuscany D. Southern England I am torn between A & B

121. ## Living a Healthy Life

When playing outside, children should wear protective clothing and play in shaded areas to A. stay cool and maintain psychological equilibrium. B. prevent attacks of scabies. C. avoid being stung or bitten by insects. D. avoid radiation from sunlight. D.

122. ## Living a Healthy Life

Children should not be served drinks in containers made of A. Styrofoam. B. stainless steel. C. treated ceramic. D. uninsulated paper. A.

123. ## chemistry

Which of the following contains more thermal energy? A. Water at 100°C B. Ice at 0°C C. Water at 0°C D. Steam at 100°C I think d

124. ## physics

A square with side lengths of 1.05 m has a charge of 8.00 mC at each corner. Calculate the magnitude and direction of the force on each charge

125. ## Biology

Would glucose be considered a reactant in glycolysis? Also, some sites are saying that 4 ADP molecules are also reactants, but I don't understand how?

126. ## math

5/7 times9/10

127. ## math

what is 1/3 divide 5/8

128. ## physics

A Venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at speed v2 through a horizontal section of pipe whose cross-sectional area is A2 = 0.0769 m2. The gas has a density of ρ = 1.30 kg/m3. The

129. ## probability

The lifetimes of batteries are independent exponential random variables, each having parameter λ. A flashlight needs 4 batteries to work. If one has a flashlight and a stockpile of n batteries, what is the expected time that the flashlight can operate?

130. ## AP Calc

A rectangle is inscribed into the region bounded by the graph of f(x)=(x^2-1)^2 and the x-axis, in such a way that one side of the rectangle lies on the x-axis and the two vertices lie on the graph of f(x). What is the maximum possible area of such a

131. ## Chemistry

A volume of 725 mL of a gas is collected at 105 degrees celcius and 746 torr. The gas sample wights 1.92 grams. What is this gas?

132. ## Chemistry

An unknown metal with a mass of 260 g has a heat capacity of 100 J/oC. What is the specific heat of the metal? I am stuck finding the right equation, knowing that the mass is 260 g and heat is 100 J per Celsius. Thus, going with the equation, q=msT, the

133. ## Gen Chem

In an experiment I used .139 grams of an Alka Selzter table. A question asks us to determine the amount of CO2 dissolved in 5.10ml of 6M HCl. How do you go about solving such a problem?

134. ## AP Calc

Find the point on the curve y^2=4x closest to the point (8,0). My Work: Using the Distance formula- my answer i got was (7.821,5.593) but idk if i did it right...

135. ## biology

Are Lilac flowers vascular or non vascular

136. ## English MS Sue

Got my final exam test graded.i made a 93. he praised me for only missing 7 questions And they all were on the complex or compound complex sentences which were my weakness I know. proud that I got a 96.83 average for course. Thank You for the help and

137. ## English Writeacher

I want to thank you for advice and help in my English course. On my 9 page final I missed 7 questions, but what was so bad it was on complex and compound complex sentences my weakness I knew. I made 93 on final. I have a 96.83 grade average for course.

138. ## health

How and why is feeling of tiredness and lethargy connected to depression?

139. ## AP Calc

Find the point on the curve y^2=4x closest to the point (8,0). My Work: Using the Distance formula- my answer i got was (7.821,5.593) but idk if i did it right...