# Questions Asked onApril 10, 2008

1. ## PHYSICS

Calculate the power output of a 1.3-g fly as it walks straight up a windowpane at 2.5 cm/s

2. ## PHYSICS

An alpha particle (which has two protons) is sent directly toward a target nucleus containing 80 protons. The alpha particle has an initial kinetic energy of 0.79 pJ. What is the least center-to-center distance the alpha particle will be from the target

3. ## physics

In order to keep a leaking ship from sinking, it is necessary to pump 12.0 lb of water each sec from below deck up a height of 2.00 m and over the side. What is the minimum horsepower motor that can be used to save the ship?

4. ## Chemistry

a solution saturated in calcium hydroxide(limewater) has a pH of 12.35. What is Ksp for calcium hydroxide? How do i start this problem. please

5. ## chemistry

A standard solution of FeSCN2+ is prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN. The equilibrium concentration of FeSCN2+ ([FeSCN2+]std) for this standard solution is assumed to be ____ M.

6. ## physics

A 62.0-kg baseball player begins sliding 3.40 m from third base w/ speed of 4.35 m/s. If the player comes to rest at third base (a) how much work was done on the player by friction? (b) what was the coefficient of kinetic friction between the player and

7. ## physics

A 62.0-kg baseball player slides 3.40 m from third base w/ a speed of 4.35 m/s. If the player comes to rest in third base , (a) how much work was done on the player by friction? (b) what was the coefficient of the kinetic friction between the player and

8. ## Humanities

How does life, works, and legacy of Beethoven relate to the heroic aspect of romanticism?

9. ## English (Frankenstein essay)

I had to write an essay about Frankenstein . I had to talk about chapter five and say what techniques were used and I also had to talk about why it's still relevent and what the novel contributed. Please could you proof read it and help me to improve upon

10. ## A cell crossword puzzle (sci.)

the cells of plants and algae have a hard __ ___ made of cellulose

11. ## Physics

A spring with constant speed of 3.5x10^4 N/m is initially @ its equilibrium length. (a)How much work must u do to stretch the spring 0.050 m? (b) How much work must you do to crompress it 0.050m?

12. ## physics

For the step ladder shown in the Figure, sides and are each ft long and hinged at . is a -ft long tie rod, installed halfway up the ladder. A -kg man climbs ft along the ladder. Assuming that the floor is frictionless and neglecting the weight of the

14. ## Chemistry

What is the pH of a 1.24 mol/L solution of HCN(aq) if its Ka = 6.2 x 10^-10? I am not sure how to this question... I did 6.2x10^-10/ 1.24?? I am not sure if it is right OR are we suppose to find the Kb value which i already did Kb= kw/ka =

15. ## Chem Help!

I really need help with this question for my chem H.W. 1) On a summer day in Breckenridge, Colorado, the atmospheric pressure is 525 mm Hg. What is this air pressure in atmospheres? (round to the hundredths place) atm

16. ## statistics

In a population-based cohort study, an entire community was interviewed regarding smoking habits and then followed for one year. All lung cancer deaths were ascertained and the following data were available: Fifteen (15) lung cancer deaths occurred among

17. ## chemistry

The correct interpretation of the equation below is: Fe3+(aq) + SCN–(aq) --> FeSCN2+(aq) A. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. B. The equilibrium constant is Kc = [Fe3+][SCN–][FeSCN2+] C. A

18. ## Physics

How does Rutherford's model of the atom account for the back-scattering of alpha particles directed at the gold foil?

19. ## Science

Can someone tell me if I answered my question correctly? During the cell cycle when does DNA replication take place? During interphase and the DNA synthesis separates the eukaryotic cells into four phases. Gap 1 phase is the intervals between mitosis and

20. ## statistics

In a population-based cohort study, an entire community was interviewed regarding smoking habits and then followed for one year. All lung cancer deaths were ascertained and the following data were available: • Fifteen (15) lung cancer deaths occurred

21. ## Physics

Does the de Broglie model assert that an electron must be moving in order to have wave properties?

22. ## chemistry

Determine the ionization energy of a hydrogen atom (in kJ/mol) if the electron is in its ground state. (Hints: Use the Rydberg equation, remember E=hc for a single H atom, and R=109678x10–2nm )

Is there a difference between a main idea and a central theme?

24. ## chemistry

The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.510. If a trial's absorbance is measured to be 0.250 and its initial concentration of SCN¡V was 0.00050 M, the

25. ## Physics

When an electron makes a transition from its first quantum level to ground level, the energy difference is carried by the emitted photon. In comparison, how much energy is needed to return an electron at ground level to the first quantumlevel?

26. ## Algebra

Find the radius of a right cone with slant height 21 m and surface area 168pi m2

27. ## math

1. (sinx/cscx)+(cosx/secx)=1 2. (1/sinxcosx)-(cosx/sinx)=tanx 3. (1/1+cos s)=csc^2 s-csc s cot s 4. (secx/secx-tanx)=sec^2x+secxtanx 5. (cosx/secx-1)-(cosx/tan^2x)=cot^2x

28. ## Chemistry

Calculate the concentration of a 50.0mL sample of HBr acid, which was titrated with 37.7 mL of 0.57 M NaOH base. Why is an overshot endpoint not a good titration?

29. ## Math

We have to solve for the problem below to make sure that it is equivalent to 2csc(x). However, I keep getting 2/2sin(x) and not 2/sin(x), which is what 2csc(x) is. tan(x)/(1+sec(x))+ (1+sec(x))/tan(x)= 2csc(x)

30. ## Biology

Describe two similarities and two differences between eukaryotic cells and prokaryotic cells. Why do you think eukaryotic cells developed? Describe how eukaryotic cells are similar to a production line.

31. ## chemistry

The correct interpretation of the equation below is:? Fe3+(aq) + SCN¨C(aq)¡ú FeSCN2+(aq) A. The reaction is incomplete because the product is still charged. B. A heterogeneous equilibrium exists because of the charged ions. C. The equilibrium constant

32. ## Biology

Do you know, by chance, how scientists discovered the make-up of DNA? Was it via a microscope and if so, what type of microscope allows you to view the structure of DNA?

33. ## Algebra 1

Suppose students in your school arrive in groups each morning. You are the first to arrive, and you are alone, but still considered a group (consisiting of one person). The second group has two more people than the first group. The third group has two more

34. ## Chemistry

The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.530. If a trial's absorbance is measured to be 0.150 and its initial concentration of SCN– was 0.00070 M, the

35. ## Science!!!!!!!

Okay, fill in the blanks...... Oceans affect climates by ______ the rise and fall of air tempature. (slowin, speeding up) A rain shadow is the side of the mountain that ______ clouds and rain. has, does not have The Gulf Stream ____ the wind above it.

36. ## English expression

Write down a sentence in a contraction in each box. Write down a sentence having a contraction in each box. Write down a sentence with a contraction in each box. Write down a sentence in a shortened word in each box. Write down a sentence having a

37. ## chem

The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an absorbance of 0.520. If a trial's absorbance is measured to be 0.275 and its initial concentration of SCN– was 0.00060 M, what is the

38. ## Chemistry

When CO2(g) (0.118 mol/L) and H2(g) (3.90 mol) in a 33.0 L reaction vessel at 980K are allowed to come to equilibrium the mixture contains 0.0853 mol/L of H20(g). What concentration (mol/L) of CO2(g) reacted? CO2(g) + H2(g) CO(g) + H2O(g)

39. ## Physics

Which color light is the result of a greater energy transition, red or blue?

40. ## Science

When water is electrolyzed, two gases ar produced. As indicated in the chemical equation, twice the volume of one gas is produced compared to the other. a) Which gas is produced in larger quantities? Explain * I think it's hydrogen, but i am not sure why

41. ## Physics

The north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles repel. Can you resolve this apparent dilemma?

42. ## English

2) What credibility did you give initially to an article drawn from the W_W_W? What are your thoughts about the practical experience versus scientific information as credible sources of information about children or families (as applied to the article)?

43. ## math

the rule ( x, 3/4) is applied to a polygon. the given point is on the original plygon. find the image of the point. a= (6,8) b=(9,8) c= (3/2, 4,3)

44. ## math plz help easyy!

the rule ( x, 3/4) is applied to a polygon. the given point is on the original plygon. find the image of the point. a= (6,8) b=(9,8) c= (3/2, 4,3)

45. ## science

Can someone help me with this question please? explain how earth naturally recycles carbon dioxide.

46. ## math

I could only get the first part of this question. Can someone help me with the second part? You borrow \$7000 from a bank for 3 years at an interest rate of 10% per year compounded daily.(Assume there are 365 days in every year) a) HOw much do you pay the

47. ## chemistry

In what ways is the large scale generation of sulfur oxides easier to control than the generation of nitrogen oxides? and in what ways is it more difficult? please help me

48. ## Economics

I am trying to calculate the reduction in consumer surplus and producer surplus caused by the tax in this graph. The price with the tax is \$12. The buyers pay \$16. Sellers receive \$8. The quantity has decreased from 25 to 15. The answers provided for the

49. ## Science

Could you please help me. When water is electrolyzed, two gases ar produced. As indicated in the chemical equation, twice the volume of one gas is produced compared to the other. a) Which gas is produced in larger quantities? Explain * I think it's

50. ## math

What is divisor. Dividend quotient

51. ## algebra 1

how do you solve linear programming questions?

52. ## Physics

How can elements with low atomic numbers have so many spectral lines?

53. ## Physics

How does the amplitude of a matter wave relate to probability?

54. ## Physics

Did Einstein support quantum mechanics as being fundamental physics, or did he think quantum mechanics was inconclusive?

55. ## chemistry

If a solution is diluted, say by adding 100ml of solvent, does the number of moles of solute change? Does the concentration increase, decrease, or stay the same? i think it depends on what the solvent is, for example if its water then the concentration

56. ## Biology

Ok, equilibrium is the notion of non-change in population gene pools right? But how does gene flow upset this equilibrium?

57. ## math

4 lbs. of bananas cost 156. each lbs of bananas cost how many trinkets?

58. ## math

A farmer plants seeds in a field that is 125 meters long by 75 meters wide.The seeds must receive 1 liter of water per square meter every day. How many liters must the farmer apply to the field everyday?

59. ## math

A farmer plants seeds in a field that is 125 meters long by 75 meters wide.The seeds must receive 1 liter of water per square meter every day. How many liters must the farmer apply to the field everyday?

60. ## science(chem)

I have a question about distillation. Or heating in general. When something says heat for 1hr or 1/2 hr do you start counting when you turn on the hotplate? Or do you start counting when the mixture is boiling? I have a feeling that this issue is affecting

61. ## INT

As suggested by Fisher (2003) in Living Religions, consider the interrelatedness of everything in the cosmos as it is expressed in many indigenous religions. How do you think the importance of these relationships developed? What spiritual purpose do you

62. ## Chemistry

The concentration and volume of reagents combined in each trial are listed in the table below: Trial 00020 M 00020 M H2O(mL) Fe(NO3)3(mL) KSCN (mL) 1 5 2 3 2 5 3 2 3 5 4 1 4 5 5 0 Initially (right after combining and before any reaction occurs) the

63. ## Physics

Uranium-238 is 238 times more massive than hydrogen. Why, then, isn't the diameter of the uranium atom 238 times that of the hydrogen atom?

64. ## math

can you solve this equation by using simultaneous equations and can you write the method please? Sarah and Louise have a combined age of 24. Six years ago Sarah was triple Louise's age. What is Sarah and Louise's ages now. Let Sarah be x and Louise be y.

65. ## Math (Trig) a.s.a.p, thanks!

verify the identities: 1.) 2tanx-(1+tanx)^2 = -secx 2.) cos(x-330degrees)=1/2(ã3cosx-sinx) *the ãis only over the 3* 3.) 1+cos2x/sinx=cotx any help is greatly appreciated!!

66. ## Biology

Can you provide me with a simple understanding of fick's law. Basically just for a grade 11 student to understand what symbols mean what and the general understanding. I cant seem to piece it together myself but need to have a basic understanding of it for

67. ## Physics

If the electron in a hydrogen atom obeyed classical mechanics instead of quantum mechanics, would it emit a continuous spectrum or a line spectrum?

68. ## marketing

what are the 6 major markets of 3M

69. ## calculus

Can anyone walk me through the steps of solving either of these problems? 1)Determine the percentage of change of f(x)=e^0.9x at x=15 and x=30 2)For the demand function q=150(245-p^2), find E(p) and determine if the demand is elastic or inelastic (or

70. ## Math

7 divided by 10 1/2

71. ## Social Studies.

In Spain, does any1 know the main king that lived the longest?????

72. ## Physics

A rocket with a mass M moves along an x axis at the constant speed vi=40 m/s. A small explosion separates the rocket into a rear section (of mass m1) and a front section; both sections move along the x axis. The relative speed between the rear and front

73. ## Critical Thinking

Is this an argument? If the recent evidence of deterrence is shown to be correct, then opponents of capital punishment will face an uphill struggle on moral grounds. Premise: If the recent evidence of deterrence is shown to be correct Conclusion: then

74. ## criminology

You and your team are preparing to give an oral presentation to your coworkers at the upcoming weekly training meeting. Your training coordinator has requested that you speak about risk factors for becoming a victim of crime. He would also like you to

75. ## Math

Consider the equation x^2 + 20 = 12x A) draw geometric diagram representing this equation. B) Show how to complete the square geometrically. C) Solve the equation.

76. ## Chemistry DrBob

You told me the steps on a previous post but i must have forgot how to work out absorbance or ICE cus i keep getting the wrong answer ... The standard solution of FeSCN2+ (prepared by combining 9.00 mL of 0.200 M Fe(NO3)3 w/1.00 mL of 0.0020 M KSCN) has an

77. ## chemistry

the concentration of OH ions in a household ammonia cleaning solution is0.0035M. Calculate the concentration of H ions. would it be pH=-log (.0035)??? or Kc=1/.0035???

An important factor to consider in choosing your classes is how employers will view the skills you have developed during your college experience. How will you select classes to develop the skills employers expect? What other activities might you engage in

asked by rose - Ms. sue
79. ## Science

The waves that are used have to go deep into the earth. Can Love and Raleigh waves be used for the purpose of mapping the interior of earth? Why or why not?

80. ## english - Please revise

As a psychology major, when choosing my classes my main emphasis and focus is on my course of study such as, psychology, social skills, English etc. However, there are other subjects that might not be a requirement, therefore, the skills might come in

81. ## Chemistry

You run a titration using HCI as the sample with 3.56M KOH as the titrant. Calculate the concentration of the HCI if the sample size were 25 mL, and if the volume of the titrant used were 29.6 mL.

82. ## Math

Could someone please check my answer? Thanks You lend Joanne \$62,000. You charge an interest rate of 18% compounded weekly. Joanne will pay you back in regular weekly payments for 10 years, at which time the loan will be repaid in full. What is the amount

83. ## physics

The system shown in the Figure is in equilibrium. The mass of block 1 is 2.2 kg and the mass of block 2 is 3.5 kg. String 1 makes an angle = 28o with the vertical and string 2 is exactly horizontal. what is the angle between the string that connects the

84. ## humanity

what spiritual purpoe do you think they serve for indigenous people?

85. ## science i really need help

describe how electricity is produced in a nuclear power station ??

86. ## physics/science

i don't understand why radioactive waste is stored underground is it because it is a harmful substance

asked by exam in 3 weeks
87. ## help

how many degrees are in 20%?

88. ## Geometry

A cone is formed by revolving which of the following figures about a line containing one of its edges? A. Rectangle B. Right Triangle C. Semicircle D. Hexagon

89. ## Physics

What evidence supports the notion that light has wave properties? What evidence supports the view that light has particle properties?

90. ## Maths

can someone please help i think i have the solution but i keep confusing myself with negative - negative (maybe i've been staring at it to much 2(3x - 1) - 3(x - 2) = 4x

91. ## accounting

After aging the accounts receivable, it is estimated that \$800 will not be collected and the allowance account has a credit balance before adjustment of \$200. The adjusting entry for estimating uncollectible account expense should be in the amount of_____?

92. ## Accounting

After aging the accounts receivable, it si estimated that \$800 will not be collected and the allowance account has a debit balance before adjustment of \$100. The adjusting entry for estimating uncollectible account expense should be in the amount

93. ## french

Where you usually eat? Ou tu manges d'habitude? I was wondering for asking the question, where the d'habitude goes? End of sentence? And for answering... Je manges au restaurant d'habitude. or D'habitude, je manges au restaurant. or Je manges d'habitude au

94. ## SraJMcGin: French

I've corrected my work. I think I got everything. About the Hugh Heffner presentation, the bit about the A levels. I wanted to say that he now has ten A*s at GCSE level and 4 As at A level. Those are the exams you have to take in England, though I suppose

95. ## biology 11

i am soo stuck on this question please help. 3. It is hard to understand how seemingly random events like mating could lead to evolution in a particular direction. What must we understand about natural selection that would allow this to happen?

96. ## Biology

A cell with replicated chromosomes. Pick haploid, diploid, or none. Explain why you chose the one you did. My answer:(I am not sure if this is complete enough?) I think it is a diploid, because diploids are copies of each chromosome. A chromosome pair

97. ## social studies

1. what are the problems and strategies for sustainable social political instotutions 2. what are the emergence issue in nigeria education

98. ## Algebra/Geometry

Why are we able to develop the volume formula for cones from the volume formula for pyramids?

99. ## health homework

what is the correct sequence of nerves you feel when someone tickling the back of the leg? sacral plexus,spinal cord, thalamus,brain stem, cerebrum. Is this right?

101. ## algebra 2

what is the value of log10 6.85 to the nearest ten thousandth

102. ## French

Please help! These are the directions:(minus the accents) Faites de nouvelles phrases avecles sujets entre parenth?ses. 1. Vous amenez des copains ? la f?te. (toi, Fran?ois, C?cile, et Christine) What do I do? Is this right: Fran?ois, C?cile, Christine, et

103. ## Science

Which waves can be used to map the interior of earth?

104. ## science

importance of rivers in florida???

105. ## intergers

6 times negative 6

106. ## social studies

what is the responsibility of the sate government

107. ## math

I keep getting an answer with an exponent and i am not sure what i have done wrong here. Any help is appreciated. To save for his retirement, Jeff puts \$800 per month into his savings account every month for 30 years. The savings account pays 9% interest

108. ## Not sure what this topic means?

Although i'm finished my essay i'm still unsure of this topic: The topic is that I have to research the colonical history of the Belgian Congo, and discuss Heart of Darkness' portrayal of and commentary on it. Does this mean I have to discuss Heart of

109. ## math

Given variables and a set of results where the results, if graphed, all fall on a continuous line that has one and only one y for every x--can anyone help me come up with the formula that would use these inputs (.4 and .999 through -.999)and produce these

110. ## math

(sec(of theta)+1)(sec(of theta)-1)=tan^2(of theta)

111. ## english

What are the 4 nucleotides found in DNA?

112. ## Weather in Science

I have to write a weather report. Does anyone have any tips, pointers for the tppic, How have scientists been able to describe past climates?

113. ## A Cell Crossword Puzzle (science)

another name for prokaryotes (7 letters last letter is [A]).

114. ## biology

My teacher made us learn about the cell and I need three sentences that would be considered data.

115. ## French =)

Please could you check my French homework for mistakes? The first part is a presentation and the second part is my half of a role play. Also do you know of any websites that can help you with pronunciation? Hugh Heffner Mesdames et messieurs, je vous

116. ## chemistry

An equilibrium constant ... A. is the same, regardless of the initial concentrations of reactants. B. is small when the products are favored in the reaction. C. is calculated by dividing the concentration of the reactants by the concentration of the

117. ## science

what chromosomes pair is affected ( tay-sachs)

118. ## Ph. Ed

five (5) different products that have to do with sports. It can be exercise equipment, practice equipment, protective equipment, supplements, etc. Tell me about each product, the price, and if you would or would not but this product and why or why not.

119. ## Math

Is it possible for two right rectangular prisms to have the same volume yet not have the exact same dimensions? If it is not possible, explain why. If it is possible, give an example that proves the statement.

120. ## history

The legend of this 12 century English bandit-hero made known through the ballads and songs of wandering minstels who weaved a patchwork of fact and fiction into the contemporary culture of time. Who was he?

121. ## algebra 2

square root x + 22= 3+ square root x +1 how do i do that??

122. ## Math

Can someone explain how to do this Give the five-number summary of each set of numbers 7, 7, 5, 4, 1, 9, 8, 8, 8, 5, 2. I'm not to sure how to do this?

123. ## Math

Find the range of each set of numbers. 7, 7, 5, 4, 1, 9, 8, 8, 8, 5, 2

124. ## math

Is it true that for any series of numbers that when graphed make a continuous line with one and only one y value for each x value, that that series has a unique formula?

125. ## science

how can people help reserve and protect water resouces?

126. ## chemistry

do gases have a high or low density?

127. ## spanish

i know that "hay" is there are or there is... but how do you say there was??

What is 7x7=

129. ## math

what is the slope and y intercept for the equation y=2/3 x +1 please show the work Thanks

130. ## SOCIAL STUDIES

WHAT ARE THE NAMES OF ALL THE CARICOM COUNTRIES

131. ## math

what is the slope and y intercept for for y= -3x - 1 Thanks

132. ## math

how would you plot on a graph y=(2/3)x + 1 Thanks

133. ## I just want to say Thanks (:

I would just like to say Thank you to everyone who devotes their time to help us with our homework. THANKS SO MUCH!!!

134. ## lesmahagow high

what is radioactive waste and why is it stored underground

135. ## science exam help

what is radioactive waste and why is it stored underground ??

136. ## algebra 2

()=square root sign... (x+22)=3+(x+1) how do i do this problem

137. ## Biology

Can anyone tell me what a heterotrophic organism is and then give an example?

138. ## science

What are the 4 nuclotides found in DNA?

Hi, Can someone proofread and check my grammar please? Is there any chance I can post the website of this article in order to get feedback on my summary on it? I want to know if I got the main points of the article correctly and answered this question

140. ## english-fallacies

I need help distinguishing between fallacies

141. ## biology

Minerals ener the plant through the soil solution. SOme are passively carried along with the ater that is taken up. Plants can also selectively absorb minerals and accumulate them. This requires active transport across a cell membrane. If it were not for

142. ## biology

In what ways would you expect a fetus to differ from an animal some time after birth?

143. ## geometry

what is the surface area of the shipping crate?