# Questions Asked onNovember 29, 2013

1. ## phy

A slab of ice floats on a freshwater lake. What minimum volume must the slab have for a 50.0kg woman to be able to stand on it without getting her feet wet?

2. ## Study Unit:Main Ideas

(1) Do you enjoy being out in the fresh air? (2) Does nature restore your spirits? (3) You might want to consider hiking as a hobby. (4) It's a hobby you can begin with very little expense. (5) All you need to start is a good pair of hiking shoes. The

3. ## physics

you and a flight attendant toss a ball back and forth in an airplane in flight. Does the kinetic energy of the ball depend on the speed of the airplane? Defend you answer.

Solar simulators are used to study the performance of solar cells in the lab. In the figure below (left picture), the spectral power density of a solar simulator is shown with the blue line. The spectral power density of this solar simulator is given by:

5. ## math

The profit p(x) of a cosmetics company in thousands of dollars is given by P(x) = -5x^2 + 400x - 2550, where x is the amount spent on advertising, in thousands of dollars. What amount must be spent on advertising to obtain a profit of at least \$4 000 000?

6. ## Chemistry

Determine The Mole Fraction Of Substances In Solution Containing 36g of water and 46g of glaycerine C3H5(OH)3.

1-Consider an organic solar cell consisting of a TiO2 semiconductor with an ionization energy 7.8eV and a polymer with an electron affinity 3.4eV. Which of the followning band diagrams corresponds to the organic solar cell. The band gap of TiO2 is 3.5eV.

8. ## physics-magnets

An infinitely long wire carrying a current of 2 A is bent at a right angle as shown in the Figure. What is the magnetic field a point P, 10 cm from the corner?

9. ## algebra 1

Ashley is the manager of a theater. She has \$240 to spend on posters to advertise a new play. If she buys small posters only, Ashley can print 48 posters for \$240. If she buys large posters only, Ashley can print 30 posters for \$240. A. Write an equation

10. ## physics

John and Barry are pulling on a fence post with ropes while their friend Pat uses a chain-saw to sheer it at ground-level. John applies a force of 75.0N [40*] on one rope while Barry applies a force of 85.0N [340*] on the other rope. What is the net force

11. ## math

A rubber ball is dropped from a height of 729 feet, and at each bounce it rebounds one-third of the height from which it last fell. How far has the ball travelled by the time it strikes the ground for the 5th time?

12. ## math

You have a 20-foot ladder that you are using as you paint your house. You place the ladder so that it forms an angle of 30 at the point of contact between the ladder and the ground. How high will the top of the ladder be above the ground? Please explain.

13. ## Chemistry

The specific heat of solid gold is 0.13 J/g • °C. How much heat is needed to raise the temperature of 25.0 g of gold from 23°C to its melting point at 1063°C?

14. ## Math

If cost = -0.42 and cosw = -0.80, both t and w are positive, and the angles determined by t and w are in quadrant 3, then which of the following statements is true? Here is my answer (B).... a. t > w B. w > t(X) c. Cannot be determined please explain why I

15. ## statistics

In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report? a. standard deviation b. mean c. range d. raw numbers

16. ## Cynthia

Which of the statements below correctly compares features of plant and animal cells? Plant cells have a cell membrane, while animal cells have both a cell wall and a cell membrane. Plant cells have ribosomes only on the rough ER, while animal cells have

17. ## English

This is what I think they are 1."Leaving their native land to colonize in America," they expected to land in the colony of Virginia. A.prepositional phrase B. appositive phrase c.participial phrase d.gerund phrase e.infinitive phrase f.absolute phrase

18. ## Math

A man started to work in 1985 at an annual salary of \\$8{,}000. He received a \$600 raise each year. How much was his salary in 2012? Salary:

19. ## physics

you and a flight attendant toss a ball back and forth in an airplane in flight. Does the kinetic energy of the ball depend on the speed of the airplane? Defend you answer.

20. ## math

a rock is thrown straight up in the air from an initial height of ho, in metres, with the initial velocity vo, in metres per second. The height in metres above the ground after t seconds is given by h(t) = -4.9t^2 + vo + ho. Find an expression for the time

21. ## math

Resource allocation podunk institute of technology’s math deaprtment offers two cources: finite math and applied calculus.each section of finite math has 60 studnets, and each section of applied calculus has 50. The department is allowed to offer a total

22. ## Geometry

True or False: If a figure does not have point symmetry, it cannot have reflection symmetry.

23. ## English

Are these right "Stamp collecting" is fun for children and adults alike. (Subject) Which "of my stamps" do I like most? (Adverb) Collectors "engaging in their hobbies" are never bored. (Adjective) Many residents of Hawaii work in "fishing" and "weaving".

24. ## PHYSICS

a) What is the maximum current in a 4.00 µF capacitor when it is connected across a North American electrical outlet having ΔVrms = 120 V, f = 60.0 Hz? mA (b) What is the maximum current when it is connected across a European electrical outlet having

25. ## Math

A swing has a maximum height of 2 m and a minimum height of 0.5 m and it takes 3 seconds to get from the maximum height to the minimum height. Approximate the instantaneous rate of change 1 second into the fall using the difference quotient when h is 0.01.

26. ## math

A statistic professor plans classes so carefully that the lengths of her classes are uniformly distributed between 46.0 and 56.0 minutes. Find the probability that a given class period time is less than 51.75 minutes

27. ## physics

A loaded sled is pulled by means of a rope that makes an angle of 45.0° with the horizontal. If the mass of the sled is 60.0 kg and the coefficient of friction is 0.020, how much work is done in pulling the sled for a distance of 1.000 km?

28. ## Help

As a project for her early childhood education class, Pauline designs a sample development checklists for gross motor skills for four years old. Pauline should included all but one of the following on her developmental checklists. Which shoudl she not

29. ## Social Science

Discuss how the recent PATRIOT Act may advance various forms of collective behavior among groups within the United States. 2. Discuss the reasons for resistance to social change. 3. Describe the political, social, and ideological reasons behind the Defense

30. ## Math

I forgot to post the rest. Sorry. It is the same thing as the first one, but I do not understand why my answer is wrong on all of them. 16. If sint = 0.29 and sinw = 0.43, both t and w are positive, and the angles determind by t and w are in quadrant 2,

31. ## us hist

As a result of the Emancipation Proclamation, A) Democrats made significant political gains in the Northwest by capitalizing on voters' racist fears. B) Republican politicians vigorously defended the cause of racial justice and black equality. C) the

32. ## Probability and Statistics

The proportion of adults living in a small town who are college graduates is estimated to be p = 0.6. To test this hypothesis, a random sample of 15 adults is selected. If the number of college graduates in the sample is anywhere from 6 to 12, we shall not

A group of four friends went out for dinner. Their subtotal for their meal came out to \$156. While waiting for the bill to come they tried to figure out how much the tax would be if they know the local tax is 8%. They also know they want to leave a 15% tip

34. ## History

In Jefferson’s view, George Washington’s action in addressing the Whiskey Rebellion A. was appropriate but not sufficiently bold. B. amounted to an inappropriate overreaction. C. Wouldn’t have been necessary save for the influence of Republican Clubs

35. ## us hist

Andrew Johnson’s fundamental goal was to A) guarantee black political rights. B) preserve the economic power of the southern planters. C) fund public education for blacks. D) assist poor whites with free homesteads and public education. Is D Correct?

36. ## MTH- STAT 201

Can someone please help how to solve this I keep getting the wrong answer so I am now freaking out and clueless 23) The following data show the average retirement ages for a random sample of workers in Boscov’s and a random sample of workers in ShopRite.

37. ## magnetism

Two long, parallel wires carry current in the x-y plane. One wire carries 30 A to the left along the x-axis. The other carries 50 A to the right along a parallel line at y = 0.28 m. At what y-axis position in meters is the magnetic field equal to zero?

38. ## Help!!!

Instead of toilet training her son at 18 months of age as her mother recommends, Melissa is waiting until her son is emotionally ready to begin toilet learning. How will melissa know when her son is emotionally ready??? (A) He'll be able to hold on for a

39. ## Geometry

You use a copy machine to enlarge an 8” 11” document, and you choose the 136 % enlargement setting. What will be the dimensions of the enlarged document? Round to the nearest hundredth of an inch.

40. ## science

Which of the following most likely caused the rapid change of the mountain? a.landslide b.snowfall. c.wind erosion. d.volcanic eruption. My answer is (b)

10.a)Solve the inequality x^3-5x^2+2x+8

42. ## math

show that the equation x^3-15x+c=0 has at most one root on the interval [-2,2.

43. ## Chemistry

Weak polyprotic acids are normally added to Coca Cola to lower its pH to about 2.5 and impart tartness? Show that a two litter cocacola bottled drink that contains 0.057 to 0.084 percent of 75 percent of phosphoric acid by mass,meets this ph requirement.

44. ## Health (Ms. Sue)

1. What are two ways that society could deal with future concerns about genetic information? A: ? 2. Imagine you are a scientist working on the Human Genome Project. What would you say to news reports about your research? A: ?

45. ## Solar

Greeting All, please assist with the below. Thanks. The spectral power density of a solar simulator is given by: P(λ)=7.5∗1015λ−2.25∗109 [Wm^-2m^-1] for 300nm

46. ## physics

A square loop of side "a" carries current "I". It creates a magnetic field "B-square" at its center. The same loop is then reshaped into a circle, which lowers the magnetic field "B-circle" at the center. What is the ratio B-square/B-circle?

47. ## Physics -Solinoid

Imagine you shoot an electron beam down the center of an ideal solenoid carrying current I. Which of the following will happen? a)magnitude of the field outside the solenoid will increase. B) The magnitude of the field outside the solenoid will decrease.

48. ## English

What kind of sentences are they and how do I diagram them? Large brains "do" not necessarily "confer" superior intelligence. I ordered materials to use in the craft school "from a supplier" in Minnesota. "This done," I outlined lesson plans for my craft

49. ## Chemistry

Weak polyprotic acids are normally added to Coca Cola to lower its pH to about 2.5 and impart tartness? Show that a two litter cocacola bottled drink that contains 0.057 to 0.084 percent of 75 percent of phosphoric acid by mass,meets this ph requirement.

50. ## Precal

Find all values of x such that x-6, x+6, and 10 x -6 form a geometric sequence. Give your answers in increasing order

51. ## math

Explain how to find the restrictions on the domain of a reciprocal function. (please explain it clearly) thank you!

Hi , I am having a very difficult time finding an article that contains a misconception about evolution . The article had to be be published within in this past year. Please help !!! thank you!!

53. ## Statistics

I have two coins: a quarter and a nickel. The quarter has a bias of 1/4 for heads, and the nickel has a bias of 2/3 for heads. I flip each coin 10 times. What is the probability that I observe exactly five heads total? Some explanation of the solution

54. ## biology

in what aspects are DNA and RNA polymerases similar?

55. ## Electrical Engineering

Winter is coming, so I want to make a 1500 W heating coil which will plug into a 120 V wall outlet. The coil will have a cross sectional area of 0.01 cm2 and a length (when fully unwound) of 5 m. Determine the resistivity of the coil required, in Ωcm:

56. ## MATH

A man started to work in 1985 at an annual salary of \$8,000. He received a \$600 raise each year. How much was his salary in 2012?

57. ## Philosophy

Can we attain certainty about our beliefs about reality? If so, how? If not, why not? Be sure to define certainty carefully. This is not psychological certainty (feeling ‘sure’) but logical certainty: knowing and being able to prove that you cannot be

58. ## physics

An inductor (L = 405 mH), a capacitor (C = 4.43 µF), and a resistor (R = 400 ) are connected in series. A 50.0 Hz AC generator produces a peak current of 250 mA in the circuit. (a) Calculate the required peak voltage ΔVmax. V (b) Determine the phase

59. ## Chemistry

Determine The Mole Fraction Of Substances In Solution Containing 36g of water and 46g of glaycerine C3H5(OH)3.

60. ## English (grammar)

Is this statement correct? "Helping other people contributes to your being a great leader." I'm not really sure with the phrase 'to your being'. It sounds incorrect but I'm not really sure. If it's incorrect, how do I rephrase the sentence?

61. ## Math

P(x) = (2x^3+x^2-18x-9)/(x^2-x-6) 1.Find any holes in the graph of P(x) 2.Find any horizontal or oblique asymptote 3.Determine where it crosses the horizontal/oblique asymptote (if it does)

62. ## information technology

How does the organizational strategy drive the IT strategy?

63. ## Civics

why are our rights such as freedom of speech not unlimited?

64. ## math

Explain how to find the equation of the vertical asymptotes of a reciprocal function in full details.

The reciprocal of a linear function and a quadratic function have the same horizontal asymptote.what is its equation?

66. ## Civics the right question

2. What have been the effects of a society that offers protections to those accused of crimes/wrongdoing?

67. ## Statistics

Hello, my problem is I have a random sample of only 15 sales average is \$115 with a known population standard deviation of \$25.00. Obtain a 92% confidence interval and explain what your answer means. I am not sure what to do because the sample size is only

68. ## math

an = 3 a_{n-1} - 5 a_{n-2} - 4 a_{n-3} and a_4 = 42, a_5 = 147, and a_6 = 219. Find a_1, a_2, and a_3.

69. ## English

Many events take place on the island but everyone feels guilty and sorry for their actions in the end and they head back to Italy, Milan safely all thanks to Prospero's spirit, Ariel. Ariel is a spirit who used to be a slave of Sycorax, an evil witch.

70. ## Trigonometry

If Cot θ = -Square Root of 15/7, use the fundamental identities to find Cosθ > 0.

71. ## PreCal

I'm suppose to solve log(3)-27=x I get 3^x=-27 I can't go any father correct?

72. ## math

Give the three general forms for: a) the reciprocal of a linear function b) the reciprocal of a quadratic function c) a rational function Please give me in a full details for each please...

73. ## Civics...a few more questions

What have been the effects of a society that allows the freedoms listed in the 1st Amendment?

75. ## algebra 1

The table that follows shows the relationship between the boiling temperature of water (°F) and the altitude (per thousand feet): Boiling Point of Water Altitude (1000 ft.) Temperature (°F) 8 197.6 4.5 203.9 3 206.6 2.5 207.5 Gemma and Tessa need to find

76. ## history

the ____ act required king______ 1 to convene parliament every three years. is it parliament,king charles?

77. ## Civics

what is the purpose (intended effect) of the rule of law

78. ## hummanites

What trend contributed to the nomadic lifestyle of the gulf cultures? A.trade with buffalo hunters B.arrival of apache in the south of Texas C.marshy land along the coast made farming difficult D.reintroduction of the horse by the Spanish

79. ## Precal

Find x such that -8 x - 3, 3 x - 1, and 2 x + 49 are consecutive terms of an arithmetic sequence. x=?

80. ## Precal

find the minor axis 1x^2+36y^2=1

81. ## Physical Chemistry

A pharmaceutical preparation of pH 6.2 is preserved with substance A (pKa 8.5). If the preservative effect is due to the undissociated molecule determine the per cent of active preservative present in the preparation. Thanks! :)

82. ## College alerbra

solve the exponential equation. 4^(x+2)=9x

83. ## history

trouser wearing members of a revolutionary uprising of the french working class were called the___________?

84. ## Law

Research and identify a labor law that is specific to your state. Share a brief summary of the law with us and discuss why you believe this law is or is not important to the employer-employee relationship.

85. ## math

whats the derivative of lnx?

86. ## math

Consider the following hypothesis statement using alpha = .05, and data from two independent samples: Ho: µ1 - µ2 = 0 Ha: µ1 - µ2 not equal to 0 X1 = 237, X2 = 218 ¬1 = 54, ¬2 = 63 n1 = 42, n2 = 35 a) Calculate the appropriate test statistic and

87. ## English

Can someone check my sentences? They are really urgent. Thank you in advance. 1) The Reformation was caused by the refusal of Pope Clement VI to declare invalid Henry VIII's marriage to Catherine of Aragon. 2)Elizabeth I continued her father's policy. She