1. Science

You pull a door open. If the force the door exerts on you is equal to the force you exert on the door, why don't you move?

2. Physics

What wavelength photon would be required to ionize a hydrogen atom in the ground state and give the ejected electron a kinetic energy of 13.1 eV? I tried ryhdberg's equation and E=hf. Need help. Thanks

3. Science

A box being pushed with a force of 85N slides along the floor with a constant speed. What is the force of sliding friction on the box?

4. Science

Suppose you are standing on a bathroom scale next to a sink. How does the reading on the scale change if you push down on the sink?

5. chemistry

How many moles of O are present in 14.8 moles of Fe(NO3)3? Can you show work so I can understaned how to do.

6. Physics

You are installing a new spark plug in your car, and the manual specifies that it be tightened to a torque that has a magnitude of 45 N·m. Using the data in the drawing, determine the magnitude F of the force that you must exert on the wrench. Lenght of

7. chemistry

how much oxygen is produced by heating 20g of mercury (II) oxide if 18.6g of mercury is produced?

8. chemistry

Copper (2) fluoride contains 37.42% F by mass. calculate the mass of fluorine (in grams) contained in 35.6 g of copper(2) fluoride.

Alright. So, I have to write an essay answering these questions... Why was Genghis Khan able to conquer such a vast territory? How did Mongol rule affect China? How is Genghis Khan viewed in Mongolia today? Given his actions, would you view Genghis Khan as

10. history

Hi i'm struggling in this essay topic for history, can anyone provide me some help... Discussion: The Union victory in the Civil War and developments during Reconstruction turned US policy toward support for industrialization and away from agriculture.

11. Science

Find your mass if a scale on Earth reads 650N when you stand on it.

12. English expression

1. He is thin / skinny / slender. 2. She is heavy / overweight / fat /plump. Do you have some more common adjectives descriving weight?

13. physics EM

Which of the following choices of path allow you to use Ampère’s law to find B(r). 1. The path must pass through the point r_vec. 2. The path must have enough symmetry so that B(r)x dl is constant along large parts of it. 3. The path must be a circle.

The circumference of a circle is 12.56 centimeters. What is the approx. measure of the circle's radius? A. 2 B. 2.5 C. 4 D. 8 I think that the Diameter would be 4.18 so the radius would be 2.04 or rounded to 2.

15. chemistry

write a balanced equation for the reaction that occurs when an aquesous solution of iron(II) chloride is mixed with an aqueous solution of potassium hydroxide

16. English expression

1. What color eyes does he have? He has dark brown eyes. 2. What color hair does the dog have? She has brown hair. 3. Hair is used not only for people's hair but also for animals' fur. 4. The order of writing the date in English is different from that in

17. English

Which demonstrates correct use of modifiers; A.Kendah found a broken glass washing her dishes. B. Startled by the noise, the alarm clock was knocked on the floor. C. Standing on a chair, I was just able to reach the high window. D. Rocco gave snacks to his

18. chemistry

Copper (2) fluoride contains 37.42% F by mass. calculate the mass of fluorine (in grams) contained in 35.6 g of copper(2) fluoride.

19. Social Studies Essay - - Ms. Sue

Hello, Ms. Sue. (: Here's that Genghis Khan essay. I'd appreciate constructive criticism. - - - Genghis Khan possessed brilliant tactics and advanced technology for his time, which resulted in him conquering a broad amount of land. Under Mongol rule, China

20. cook

what kitchen utensil or equipment starts with the letter "A"

21. English

Which has a subject complement? A. The nurse felt my pulse. B. I felt much better. C. The day ended with many surprises. D. We can't leave without seeing her. Please explain

22. Science

You weigh yourself at the top of a high mountain and the scale reads 720N. If your mass is 75K, what is the acceleration of gravity at your location?

23. Astronomy

Mercury has an orbital eccentricity of 0.21. Find the perihelion and aphelion distances of Mercury. What is the ratio of Mercury's orbital speed at perihelion to that at aphelion?

24. us history

what was the purpose of the manhattan project

25. Physics - Satellites

Why must the centre of the satellite orbit coincide with the centre of the Earth? I'm such a science noob, please help >_

26. physics

From a distance of 60 m, a photographer uses a telephoto lens (f = 300.0 mm) to take a picture of a charging rhinoceros. How far from the rhinoceros would the photographer have to be to record an image of the same size using a lens whose focal length is

27. physics

questions( there are 3 so I will # 1-3) info: A 18.9 kg object is attached to a cord that is wrapped around a wheel of radius 10.7 cm. The acceleration of the object down the frictionless incline is measured to be .9 m/s2. Assume the axle of the wheel to

28. English expression

How many are there in Mi-na's family? There are five in her family: her father, her mother, her older brother Min-su, her younger brother Min-ho, and her. How many people are there in Mi-na's family? How many members are there in Mi-na's family? How many

29. physics

A camera is supplied with two interchangeable lenses, whose focal lengths are 35.0 and 150.0 mm. A woman whose height is 1.80 m stands 7.00 m in front of the camera. What is the height (including sign) of her image on the film, as produced by (a) the

30. Human Service

My assignment was to design a Reward System for a human service organization. I had to indicate how I will ensure that, basic needs are met, competitive benefits are offered, benefits are equally distributed, and employees ar treated as individuals. I was

31. *physics*

Electrons accelerated by a potential difference of 12.87 V pass through a gas of hydrogen atoms at room temperature. Calculate the wavelength of light emitted with the longest possible wavelength. I don't know what equation to use. Any help would be

32. geometry

How do you do linear equation

33. Physics

A pitcher throws a curveball that reaches the catcher in 0.51 s. The ball curves because it is spinning at an average angular velocity of 345 rev/min (assumed constant) on its way to the catcher's mitt. What is the angular displacement of the baseball (in

34. Science

Determine the direction of the net force on a book sliding on a table if the book is slowing down.

According to CCMS, the small size of this school helps the downtown urban community meet their needs, in particular at-risk students from low-income households because the students are given more individual attention by faculty members. As a small charter

36. Physics

A certain CD has a playing time of 76 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude of the average angular

37. Accounting

What is meant by the statement “One company’s account receivable is another company’s account payable?

38. Organic Chemistry

What is the oxidation state of the carbon atom bonded to the hydroxyl group in isoborneol? What is the oxidation state of the same carbon atom in camphor?

39. English expression

Who is Mi-na's older brother? He is Min-su.Min-su is. Who is Mi-na's new friend? He is Mike. Mike is. What is Mi-na's pet? A dog is. It is a doge. She is a dog. ---------------- Are all the answers to the questions all correct? Which ones are commonly

40. PHYSICS

an open tube is .86m long. Find the fundamental frequency and frequency of the next harmonic if the Temp=10deg celcius also if you closed one end of the tube what would the new fundamental frequency be?

41. Science

Describe the action and reaction force pairs involve when an object falls toward Earth. Ignore the effects of air resistance.

42. Accounting

Stockholders’ equity represents the claim of the owners on the assets of the business. What is the distinction relative to the owners’ claim between the Capital Stock account and the Retained Earnings account?

43. physics EM

using the Amperes Law The circle on the integral means that B(r) must be integrated A. over a circle or a sphere. B. along any closed line that you choose. C. along the path of a closed physical conductor. D.over the surface bounded by the current-carrying

44. English

A person who studies rocks for fun Rock _ _ _ _ _ I don't have a clue

45. English

This is for my class its about the movie Shakespeare in love, I need to know how you would personally answer these questions. Need to know if anyone can answer these questions to get a better insight? 1. What are the main themes of the film? The

46. Science

Find the mass of a car that has the speed of 30m/s and a momentum of 45,000kg,m/s.

47. Biology

I am doing a presentation on Designer Babies for school. I have to discuss how Designer Babies will impact society in a bad way. This includes the short and long term effects. I have many long term effects such as: 1. stereotypes 2. "Super Humans" 3.

48. Spanish

How do you say, How was your trip?, in spanish?

49. Physical Science

Hello, Can some one please tell me if I have the correct answer? Thank You my answer: B When an electron is displaced in a semiconductor, the hole that's left behind is? A. attracted to the negative terminal of the voltage source B. incapable of carrying a

50. English

Grammar Correction, Please? Shakespeare in Love 1) What are the main themes of the film? The filmmaker’s message is not clear until we see what happens to the protagonist. The Main themes of the film are love, overcoming obstacles and doing what you

51. chemistry

predict how many sodium ions would combine with: (a) a chlorine ion. (b) a carbonate ion. (c) a phosphate ion.

52. Environment.. again

I'm stumped with another question too. Can petroleum fractions be separated at room temperature on the basis of their viscosities? I would guess that they could but i don't know how to explain it

53. introductory paragraph!

Is it better to go to college and be successful or open your own business wihtout a college degree? This is my topic and I need help writing a good introductory paragraph. it's for a persuasive paper!!

54. History

Ms Sue, I am sorry to be a bother again. The websites u sent me are pretty good; however, they focus mainly on Africa in itself and do not focus on WEST AFRICA>>>>> if they do focus on WEST AFRICA its always ECOWAS>>>>> do u or your colleagues recommend

55. persuasive essay!!

Is it better to go to college and be successful or open your own business without a college degree? Need help writing thesis. What are some benefits of going to college rather than not going to college and opening your own business

56. Science

Explain whether there can be any forces acting on a car moving in a straight line with constant speed.

57. computers

differences between object-oriented programming languages and generations?

58. math

Could someone help me with this problem. Don't seem to understand. Write the augmented matrix of the system: x-y+2z=4 3y+z=5 3x-y=4

59. spanish

Im doing a project on Argentina, and we need to find a tradition and answer questions. Do you know of any Argentine traditions or know any websites i could use?

60. Health

Please check my answer thanks :) True of False A problem with lumbar plexus may cause pain in the posterior part of the thigh. I said False

61. Ancient History - Egypt

I need a few good resources for this question that I need to write a 1000 word essay on 'To what extent did Ramses the Great deserve his title?' I need atleast 2 book resrouces and 1 electronic.

62. literary

WHAT IS THE MEANING OF A SIMILE

63. calculus

let f be the function f(x) = e^(2x^2) find the first four nonzero terms and the general term of the power series for f(x) about x = 0 i tried doing this problem but finding the derivatives gets way too complicated can anyone help??

64. geometry

If I am given the circumference(2368) how can I find the diameter and the radius? Can you help?

What is GERD? Is it the same as acid reflux disease?

66. Stats

-------------------------------------------------------------------------------- • Give a table extrapolating potential capacity using 1,000 households as a standard unit. o Using 3 hour window as the measurement tool o Using 7 hour window as the

67. English

Is this a run-on sentence? I thought about what he'd said soon I realized he was right.

68. us history

what options did women defense workers have at the wars end

69. US history

Which Axis country took control of several countries and bases in the Pacific Ocean in 1941? A. Germany B. the Soviet Union C. Japan D. Italy

70. Language Kind of

Could Somebody please help me find out where pigment and paraffin wax are found? Like, where they are extracted as Natural Resourses. Thanks

71. Comm. Arts

Toulmin Model and Campus Gun Control? I'm getting really confused about this. I need to break down an article according to the toulmin model within the next few hours. It's about gun control on campuses. So far I've got: Claim: Guns should be allowed on

72. English expression

Look at the nurse. There are two injectors in the paper box. She is holding an injector in her left hand. She is pressing the injector, so the liquid is dropping from the needle of the injector. She is wearing a pink uniform of a nurse.

73. Math (Trigonometry)

We are working on verifing identities using trigonomic identities and such and of the about 50 or so problems we've had to complete i've been able to push through most except for these: 1.(COTx)(SECx)(SINx)=1 2.TANx + COTx = (SECx)(CSCx) 3.(COSt)(COTt) =

74. Math

What is the Median of the Following Numbers 80, 80, 80, 90, 90,100

75. History

Despite their adoption in 1948, it would be over a half a century before the UDHR and the CPPCG would be enforced for the first time. What is the explanation for this long delay in the enforcement of these documents?

76. Calculus - Partial Fractions

I've set a problem up, something like this. s^4: A+D=0 s^3: -2A+B-3D+E=0 s^2: 2A-B+C+3D-3E=0 s^1: -2A+B-D+3E=4 s^0: A+C-E=4

77. chemistry

Anyone good at making CHEMICAL CROSSWORD PUZZLES ? I have no clue on like any of these things. Like, i need to make the chemical crossword puzzles by using atleast 10 words! example: ....... TABLEEEEE! then ,,,,,,, ACROSS 1._______ 4._______ 7.________

78. Maths

Hi I have post this question before but was not able to get the answer and this is all the information in the questions this is a question for "affordable payments" Please help The Browns’ gross monthly income is \$2900. They have 12 remaining payments of

79. English

I posted this before, I need someone to check my grammar please. Shakespeare in Love 1) What are the main themes of the film? The filmmaker’s message is not clear until we see what happens to the protagonist. The Main themes of the film are love,

80. English

I need help on this question: Which sentence does the verb correctly agree with the subject: A. A copy of Moby !@#\$%^& and a magazine has disappeared from my room. B. Peggy or Phillis drive me to Flordia every winter. C. Les and Miranda is late for work

81. Calculus - Integrals

I have 3 questions, and I cannot find method that actually solves them. 1) Integral [(4s+4)/([s^2+1]*([S-1]^3))] 2) Integral [ 2*sqrt[(1+cosx)/2]] 3) Integral [ 20*(sec(x))^4 Thanks in advance.

82. Math

This is quite confusing... I'm helping someone with math. They have a problem, -4^2, and the people we're both talking to can't agree on whether it's -16 or 16. Google returns -16, my calculator returns 16. Google, however, changes it to -(4^2). I figured

83. K

(a) Find the indeﬁnite integrals of the following functions. (i) f (t) = 6 cos(3t) + 5e^−10t (ii) g(x) = 21-12x^3/ x (x > 0) (iii) h(u) = cos^2( 1/8 u) (b) Evaluate: (this big F sign at the start, 5 at the top and 1 at the bottom) 5 1/4x (7 + 6x^2) dx

84. us history

fears and predjuduces that led to the internment of Japanese-Americans during world war ll

85. Math / Percents

What is the process to get this answer? Annie spends \$600 a month on rent and makes \$25,000 per year. To the nearest percent, what percent of her income does she spend on rent? Answer: 29%

86. English

I need help on my grammar and figuring out a way to write these answers more better. Shakespeare in Love 1) What are the main themes of the film? The filmmaker’s message is not clear until we see what happens to the protagonist. The Main themes of the

87. Technology and Society

What role should corporations assume when producing and selling a toy that could be potentially harmful when handled by infants? please Explain

asked by in deep need of help

What is the area of the circle if the radius is 2 cm? A. 3 cm squared B. 6 cm squared C. 10 cm squared D. 12 cm squared I don't really know the answer to this one because I am not sure what the formula for area of a circle is. If I knew the formula the

What is the area of the circle if the diameter is 6 m? A: 9m B: 18 m C: 27 m D: 108 m I think the answer is B because if times the diameter by 3 then you get 18.

90. chemistry

Which of the following halides forms a solid when added to silver? (More than one answer may be selected) 1) Cl- 2) Br- 3) F- 4) I-

91. Science

Which instrument records seismic ways from a earthquake?

92. macroeconomics

The decision to start working full time after graduation from high school or go to university as a full time student involves marginal cost/benefit analysis. Discuss the marginal costs and benefits of the decision to enter university as a full time

93. Math

I have to solve this inequality, but i forget how to do it. I remember your supposed to do something special when your like subtracting a negative from both sides? Y-5>-6

94. Latin

How do you switch Latin words to a certain tense? And how do you switch Latin words to a specific view (i.e. third person plural, etc.)? Please explain thoroughly!

95. Accouning

A friend comes to you with the following plight: “I’m confused. An asset is something positive, and it is increased with a debit. However, an expense is something negative, and it is also increased with a debit. I don’t get it.” How can you

96. spanish

we are doing a project on a country, mine is Argentina. we have to pick 3 specific tourist destinations and say where it is, shy its interesting, if you have to pay to enter(if so how much), how a person gets there and what a person can do at this place.

Please Help On this AP Statistics Problem!?!?!? Thanks Commercials Suppose that a commercial is run once on television, once on the radio, and once in a newspaper. The advertising agency believes that any potential consumer has a 20% chance of seeing the

98. College

Im want to fill an application for Prince Geroges Community College online. what is the link?

99. math

Am I foiling this right? The problem is (x-5)^2 and I got x^2-10x-10. Is that right?

100. eth 125

i need to know what the eth stand for in eth125. the teacher said that it does not mean ethic.

101. math 116

Is it always necessary to have a common denominator to add and subtract fractions? Why? What about multiplication and division with fractions?

102. College

is this a good field of study? communication degree. what kind of job can I obtain with this degree

103. Environment

Why is the density of oil a key factor with oceanic spills and fire? I can't find the answer in my book

104. Math 115

how do you find the area of a figure the problem is listed below 25ft 10ft 10ft 40ft I am new to this and right about nowI am lost in the sauce.

105. English expression

1. How many are there in Mi-na's family? There are five in her family. 2. How many brothers does Mi-na have? She has two brothers. 3. Who is Mi-na's older brother? He is Min-su. 4. Who is Mi-na's younger brother? He is Min-ho. 5. Do they have a dog? Yes,

106. geometry

If I am given the circumference(2368) how can I find the diameter and the radius?

107. Algebra

You're supposed to graph each equation when, 2x+3y=9

108. macroeconomics

The No Child Left Behind law rewards schools and teachers based on students’ performance on standardized tests. Some school systems have instituted bonus programs for teachers whose students perform above average. Discuss this scheme in terms of

109. English

Which one of these verbs have a direct object: A. George was furious. B. They won the game. Is B the correct sentence?

110. us history

what stragies did african americans use in their struggle for equal rights during world war ll?

111. College Calculus

Suppose the series An (from n=1 to INF) is known to be convergent. Prove that series 1/(An) (from n=1 to INF) is a divergent series. I have no idea what to do... please help!

112. Health

Please help me thanks I need to know if there a web site where I can find info on the impairment of the vagus nerve may affect the ability to move what? thanks again

113. History

I having been searching the web and books to find some information on the following topic: What are some economic developments or progress in West Africa? I found a few information in books and the websites but I still need some more. Do you know anything

GCF FACTOR

115. College Programs

what kind of program is Computer Service Technologies?

116. English

do anyone have any websites about the book artemis fowl by eoin colfer?...the first book....thanx

117. Physics

If a plate is dropped and comes in contact with a hard floor vs a playe coming in contact with a carpet, which has the greater impulse?

118. English

What can setting affecting in character other than behaviour?