1. Physics

A single conservative force acts on a 5.00 kg particle. The equation Fx = (2x + 4) N describes this force, where x is in meters. As the particle moves along the x axis from x = 1.40 m to x = 5.80 m, calculate the following. (a) the work done by this force

2. physics

A 2.8 kg rectangular air mattress is 2.00m long,0.500 m wide and 0.100m thick. What mass can it support in water before sinking?

3. chemistry

When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced. CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq) What mass of limestone

4. Physics

A 90 kg halfback runs north and is tackled by a 120 kg opponent running south at 4 m/s. The collision is perfectly inelastic. Just after the tackle, both players move at a velocity of 2 m/s north. Calculate the velocity of the 90 kg player just before the

5. Physics

Each of the protons in a particle beam has a kinetic energy of 3.05 10-15 J. What are the magnitude and direction of the electric field that will stop these protons in a distance of 1.15 m?

6. English

Hello everybody! Next week I have to teach English (as a foreign language)to 6th-graders. The lesson is called Danger or thrill.It is about extreme sports.there is a text about snow boarding, some statements and a few exercises. My mentor will first

7. Science-Damon

Describe how the movement of Earth is responsible for day and night. The movement of earth is responsible for day and night because as it rotates counterclockwise we tend to have this result. The part of earth that faces the sun experiences daylight, and

8. Math

A square and an equilateral triangle have equal perimeters. The area of the triangle is 16ã3 square centimeters, how long in centimeters is a diagonal of the square? Express your answer in simplest radical form.

asked by Farie Wars in the night
9. chemistry

To what volume should you dilute 30 mL H2SO4 of a 10.0 M H2SO4 solution to obtain a 0.140 M H2SO4 solution?

10. Physics

A small object of mass 3.50 g and charge -22 µC "floats" in a uniform electric field. What is the magnitude and direction of the electric field?

11. chemistry

To what volume should you dilute 30 mL H2SO4 of a 10.0 M H2SO4 solution to obtain a 0.140 M H2SO4 solution?

12. English

I have a compare and contrast essay to do, and i need it to be really good, its about Oniomania and Frugality.I have already made my list for the compare and contrast part but i cant come up with a thesis statement to link the two and also separate them at

13. college

If a single bacteria divides in half every 20 min. how many would you have after 42 hours?

14. chemistry

When surface water dissolves carbon dioxide, carbonic acid (H2CO3) is formed. When the water moves underground through limestone formations, the limestone dissolves and caves are sometimes produced. CaCO3(s) + H2CO3(aq) Ca(HCO3)2(aq) What mass of limestone

15. College Physics

A 1500-W heater is designed to be plugged into a 120-V outlet. What current will flow through the heating coil when the heater is plugged in? I = A What is R , the resistance of the heater? How long does it take to raise the temperature of the air in a

16. College Physics

Current passes through a solution of sodium chloride. In 1.00 second, 2.68 x 10^16 Na+ ions arrive at the negative electrode and 3.92 x 10^16 Cl-ions arrive at the positive electrode. What is the current passing between the electrodes? Current = mA What is

17. College Physics

When switch S in the figure is open, the voltmeter V of the battery reads 3.13V . When the switch is closed, the voltmeter reading drops to 2.90V , and the ammeter A reads 1.70A. Assume that the two meters are ideal, so they do not affect the circuit. emf=

18. economics

Suppose that the consumption function is C=100+.8(y-t). Initially investment and government expendtures are I=75 and G=150 and taxes are T=50. 1.Depict this economy using the keynesian cross. calulate the initial equilibrium income. how much will income

19. Physics

A molecule of DNA (deoxyribonucleic acid) is 2.03 µm long. The ends of the molecule become singly ionized: negative on one end, positive on the other. The helical molecule acts like a spring and compresses 1.13% upon becoming charged. Determine the

20. Physics- repost

Posted by jude on Saturday, February 6, 2010 at 2:20am. Given a square of sidelength a = 5 cm. We place a charged particle at each corner, three of them carry + 2 nC of charge and one carries the same amount of negative charge. What is the magnitude of the

21. Calculus II

How does one obtain cos2x = cos^2(x) - sin^2(x) by differentiating the identity sin2x = 2sinxcosx

22. physics

Hi! could anyone help me please, I have no idea how to this at all. I try to it but, the did not get the right answer. Thank for your help Oppositely charged parallel plates are separated by 5.34 mm. A potential difference of 600 V exists between the

23. chemistry

1)gaseous sulfur trioxide and gaseous nitrogen monoxide form when gaseous sulfur dioxide and gaseous nitrogen dioxide react. 2)Enter the formula of the missing substance ( Y ) in the balanced equation below. Do not give the coefficient. C2H4 + 3Y → 2CO2

24. math

why is it possible to draw a circle which passes through all vertices of a rectangle

25. Physics

Given a square of sidelength a = 4 cm. We place a charged particle at each corner, three of them carry + 2 nC of charge and one carries the same amount of negative charge. What is the magnitude of the electric field at the center of the square? I read a

26. math

the width of a rectangle is fixed at 30cm. What lengths will make the perimetear greater than 88cm

27. algebra

Jennifer is twice as old as Ramon. The sum of their ages 7 years ago was 13. How old are they now?

28. Math

Hello, I'm not sure how to go about this question. To get to work on the first day, Jose has the following directions. Travel 15 miles due East. Turn right and travel 12 miles due south. Turn right again and travel 10 miles due West. If Jose could travel

29. physics

A dipole consists of two charges +q and -q, held apart by a rod of length s, as shown in the diagram. If q = 9 nC and s = 2 mm, what is the magnitude of the electric field due to the dipole at location A, a distance d = 5 cm from the dipole? E=____N/C What

30. College Physics

When switch S is open, the voltmeter V of the battery reads 3.13 . When the switch is closed, the voltmeter reading drops to 2.90 , and the ammeter A reads 1.70 . Assume that the two meters are ideal, so they do not affect the circuit. emf= V

31. math/stats

If you square a correlation coefficient and subtract this number from 1.00, what is the result? Is it the coefficient of determination?

32. statistics

A sample of n = 20 scores has a mean of M = 6. If one new person with a score of X = 27 is added to the sample, what will be the value for the new mean?

33. Physics

A charged particle A exerts a force of 2.39 ìN to the right on charged particle B when the particles are 13.3 mm apart. Particle B moves straight away from A to make the distance between them 16.1 mm. What vector force does particle B then exert on A?

34. web design

why would you use hexadecimal value instead of the name color?. I am really having a hard time looking for this.

35. Physics

The mass of the electron is 9.11 x 10-31 kg and the mass of the proton is 1.67 x 10-27kg. Both carry the same elementary charge (positive for the proton and negative for the electron). If I release both particles from rest at the middle point between two

36. St. line depreciation & salvage value

A USED CONCRETE PUMPING TRUCK CAN BE PURCHASED FOR 125,000 DOLLARS. THE OPERATING COST ARE EXPECTED TO BE 65,000 DOLLARS AT THE FIRST YEAR & INCREASE BY 5% EACH YAER THEREAFTER. AS A RESULT OF THE PURCHASE, THE COMPANY WILL SEE IN INCREASE IN INCOME OF

37. Chemistry

Ca(IO3)2(s) ⇌ Ca^(2+)(aq) + 2IO3^(-)(aq) First, you poured 30 mL of 0.100 M Ca^(2+) solution over a 2.000 g sample of solid Ca(IO3)2 and allowed the mixture to sit for 30 minutes. Some of the solid dissolved, causing the calcium ion concentration to

38. Science-Repost

Describe Earth's rotation in terms of its axis and length of time to rotate. Earth's axis has never pointed in the same direction. It slowly traces a circle every 26 000 years. The tilt of the earth's axis isn't usually pointing straight up. It traces a

39. Science-Repost

Describe how the rotation of Earth is responsible for the movement of the stars. The rotation of earth is responsible for the movement of stars because as it rotates, objects around it rotate as well, such as planets, they appear to move through the stars

40. Physics

A thin insulating thread of length L is attached to a point on the perimeter of a thin disk. Disk is has radius R< L and is charged with a uniform surface density, σ>0. At the end of the thread there is a small ball mass m and charge q>0. The mass happens

42. PHYSICS

use what you know about the motor priciple to explain the source of buzzing in power lines strung along roads. so I think that this is because of the resistance caused by the conductors in the power grid. However I don't know how this would relate to the

43. physics

Given a square of sidelength a = 5 cm. We place a charged particle at each corner, three of them carry + 2 nC of charge and one carries the same amount of negative charge. What is the magnitude of the electric field at the center of the square? I don't

44. Physics

Calculate the speed needed by a spacecraft to maintain a circular orbit at about 350 km above Earth’s surface. (it's a project where we create our own spaceship. let's say the craft is 500kg) --- Not sure about the formula to find this. All I know is

45. Calculus

Find the area of the region which is bounded by the polar curves theta =pi and r=2theta 0

46. critical thinking

Categorize each fallacy statement by copying fallacy type from the list below into the Fallacy Type ext box adjacent the fallacy statement. Provide an explanation as to why you think it is that fallacy type in the Why it is this fallacy type text box

47. Physics

A train is traveling down a straight track at 22 m/s when the engineer applies the brakes, resulting in an acceleration of -1.0 m/s2 as long as the train is in motion. How far does the train move during a 40 s time interval starting at the instant the

Suppose a fish swimming a distance of L ft at a speed of v fit/sec relative to the water against a current flowing at the rate of u ft/sec (uu+ and interpret your result b) Evaluate the limit of E(v) as v-->infinity and interpret your result

49. PHYSICS

Using the motor principle explain why a motor is rotating in the direction indicated. I seriuosly have no idea, please help explain this theory to me. PHYSICS - drwls, Saturday, February 6, 2010 at 2:15pm To help you answer that question, I'd need a figure

50. Math

How do I solve lim((3x^3 - 5x +2)/(4x^2 + 3)) as x approaches infinity? I divided everything by the largest power of x, but I ended up getting a denominator of 0. Do I have to factor this? (answer is infinity)

51. Math - another question

lim(sqrt(x+1))/(sqrt(4x-1)) as x approaches infinity.

How has the american History of african slavery influenced our contemporary society?

53. Math

Graph the solution: 3x-y-7=0 This is my thought process in this: The first equation I can solve for y since we don't have to worry what x is. And I get y>3x-7. The second one, however, y is being multiplied by 5, so I can't just divide by 5 on both sides

∫6dx/xln(5x)

55. History

Which of the following best explains the success of early nineteenth-century temperance crusaders in reducing Americans' consumption of intoxicating liquor? A) Prohibition laws that reformers succeeded in getting passed. B) High liquor taxes that reformers

56. physics

A projectile is fired from the ground level with initial velocity of 90m/s at an angle of 36degre from horizontal. find the magnitude and direct of projectile 5 secs after firring

57. Math!

A 4-year magazine subscription costs \$172 and may be canceled at any time, and a prorated refund will be made for the remaining weekly issues. If Marc cancels his subscription after receiving 42 issues in the 4th year, what refund would he get? Assume

58. physics

What is a capacitor used for in a current other than just collecting energy?

59. College Physics

Current passes through a solution of sodium chloride. In 1.00 second,2.68 x 10^16 Na+ ions arrive at the negative electrode and 3.92 10^16 Cl- ions arrive at the positive electrode. What is the current passing between the electrodes? mA What is the

what is a metaphor?

61. math

find a polynomial A(x) that represents the new area. Tracie's garden is a square with sides of length x feet. Next spring she plans to make it rectangular by lengthening one side 3 feet and shortening the other side by 3 feet

62. sociology

How would a functionalist approach interpret the !@#\$%^&ography industry? I know they would look at the money, how do I explain their logic?

63. Language Studies

Practice One: Speaker 1: Was there a fiddler at the bar last night? Speaker 2: There was a man scraping a bow across a violin. Implicature:__________________________ Speaker 1: Do you like my new carpet? Speaker 2: The wallpaper's not bad.

64. finance

Thompson stores is considering a project that has the following cash flow data. What is the project's IRR. Note that a project's projected IRR can be less than the WACC and even negative, in which case it wll be rejected. Year 0 (\$1,000), year 1 \$300, year

65. College Physics

Two copper wires have equal cross-sectional areas and lengths of 2.4m and 1.3m, respectively. What is the ratio of the current in the shorter wire to that in the longer one if they are connected to the same power supply? I1.3/I2.4 =

66. College Physics

On average, an electric water heater operates for 3.4h each day. If the cost of electricity is \$0.3 kWh, what is the cost of operating the heater during a 30-day month? The power of a typical electric water heater is 4500 W. Cost= Dollars What is the

67. College Physics

If the voltage across an ohmic resistor is quadrupled, the power expended in the resistor increases by a factor of 4. decreases by a factor of 4. increases by a factor of 16. none of the preceding

68. Math

Hello, I can't find a pattern to answer this question, can you help? The beginning of the fibonacci number sequence is listed below: 1,1,2,3,5,8,13,...... What is the smallest term in the sequence which has a value greater than 100?

69. College Physics

To move 5.0 C of charge from one electrode to the other, a 12-V battery must do how much work? 60 J 5.0 C 12 J 12 V 60 W

70. global

how does human geography affect asia?

71. Pyschology

Considering what studies reveal about personality and how it can affect development, which of the following is true?

72. MATH

HOW TO SOLVE Y=6X-11 AND -2X-3Y=-7

73. chemistry

Balance the equation: SO2 + NO2 → SO3 + NO im confused, isnt this already balanced since both sides have equal number of atoms

74. math

Hello, A ship's movements are being tracked on a radar screen. The ship is first seen on point a with coordinates (-5,8) 1. It moves along vector AB represented by the ordered pair (-6,-1) 2. Then it travels along vector BC represented by the ordered pair

75. calculus

evaluate tan^2 3.658 I know the answer is .322 but I don't know how to arrive at the answer.

76. math

the following statement always true, always false, or true in some cases and false in others? Explain your answer. A quadrilateral whose diagonals are congruent and perpendicular is a square.

77. physics

A projectile is fired from the ground level with initial velocity of 90m/s at an angle of 36degre from horizontal. find the magnitude and direct of projectile 5 secs after firring

78. math!

Radu has just returned from a business trip in Britain with £250 of uncashed traveller's cheques. How much would he receive from the bank when he converts the currency back to Canadian dollars, assuming that the bank offers an exchange rate of C\$1.00 =

79. Chemisty

A student heats 10.8 g of lead to a temperature of 90.5 C. He places the hot lead into a container of water, initially at a temperature of 24.6 C; the final temperature of the water and lead is 25.2 C. What quantity of heat was lost by the lead?

80. St. line depreciation & salvage value

A used concrete pumping truck can be purchased for 125,000 dollars. The operating cost are expected to be 65,000 dollars at the first year & increase by 5% each yaer thereafter. As a result of the purchase, the company will see in increase in income of

81. College Physics

A single resistor is wired to a battery.Define the total power dissipated by this circuit as P initial. What is the power, in terms of P initial, dissipated by this circuit? Power = P initial.

82. math

math is a hard thing for me sometimes and i need help with the question 5% OF 36 PLEASE HELP!

83. Ela

How could I put all these words: 1. Submit 2. Omit 3. Missionary 4. Emit 5. Remittance 6. Emissary 7. Permission 8. Transmit 9. Admit 10. Premise in one paragraph plz help and answer the question not just give in a tip plz

84. math

Translate the problem into a pair of linear equations in two variables. Solve the equations using either elimination or substitution. State your answer for the specified variable. A student took out two loans totaling \$10,000 to help pay for college

85. Pyschology

Morgan is a 57-year-old man whose children are off at college. According to Erikson, in order to fully develop generativity in middle age, Morgan needs to:

86. Literature

I'm still having some trouble figuring out the homeric simile in this: What a dear welcome thing life seems to children whose father, in the extremity, recovers after some weakening and malignant illness: his pangs are gone, the gods have delivered him.

87. Help

is starry night a free program?

what is the difference in estimation and truncation of a fractional answer?

89. English

I forgot to include these other two sentences, I would like you to check 1)I had luck with the weather. OR I was lucky/unlucky with the weather 2) In/on/over/during my Christmas holidays I went skiing (Which prepositions is wrong???) Thank you.

90. pyschology

Those in late adulthood suffer depression at a higher rate than any other age group. Which is the strongest predictor of depression?

91. organic chemistry

How many mols of benzoic acid are soluble in 125 mL of water at room temperature.

92. SUBSTITUTION

HOW TO SOLVE FOR Y=6-11 & -2X-3Y=-7

93. geometry

denise is designing a stroage box in the shape of a cube. Each side of the box has a length of 10 inches. She needs more room and decides to construst a large box in the shape of a cube with a volume of 2,000 cubic inches. By how many inches, to the

94. Math

Find the equation of the circle that passes through the origin and x-intercept 1 and y-intercept 0. (standard form again)

95. math

cost of item plus 7% sales tax is 211.86. what is the cost of item?

96. sociology

How does the mass media play a role in socialization? Consider the last time you viewed a television show, a movie, listened to a radio broadcast, or read an article from a newspaper or journal. Who was the intended audience? What factors might determine

97. math

a income of 63000.00 his social security tax is 12.4%, medicare is 2.9% and his estimated federal income tax rate is 22%. how much quarterly estimated tax must his send to the irs for the quarter

98. Math!

Aida is makeing some punch for a party. The recipe calls for a 3:3.50 ratio of gingerale to fruit juice. How much fruit juice would Aida have to use if she already poured 8L of gingerlae in the punch bowl? ANSWER! gingerale:fruitjuice 3:3.5 3.5/3*3=9.3L i

99. world history

southern northern in the civil war project about the cotton

100. calc

A train travels from city A to city B. The cities are 600 miles apart. The distance from city A at t hours after the train leaves A is given by d(t) = 50t + t^2. What is the average velocity of the train in miles per hour during the trip from A to B?

101. math!

The Black's assets are to be divided among their three children Josh, Sanjeev, and Alan in the ratio of 8 : 6 : 3. For full marks your answer(s) should be rounded to the nearest cent. a) If Josh received \$9,500 from the sale of securities, what amount

102. Physics

Hi, O tried this question, but I'm getting an answer of 0.99 which rounds to 1, but it was not given as one of the answer choices...can u tell me where I'm going wrong? What I did was used the following simplified formula: Volume*density*g =q*E ; where I

103. sociology

Why do we need a distinction between culture and structure? How is this related to other perspectives like conflict, ethnocentrism, or cultural relativism.

104. sociology

How do structural-functionist view culture? Why do they view it this way? How do conflict theorists view culture? and why do they view it this way?

105. Science

How can I make a 3-d model of the plant and animal cells(Clearly Labeled). Also I can't use food or clay also clay-dough. Plz help

106. HISTORY

What would 3 newspaper headline be that would indicate the significance of the attack on Pearl Harbor? They would need to be from a political, social and from an economic perspective. Please help with this. I've came up with these: THIS MEANS WAR!! BATTLE

107. PHYSICS

Using the motor principle explain why a motor is rotating in the direction indicated. I seriuosly have no idea, please help explain this theory to me.

108. social studies

to achieve full employment without inflation; > to restore external equilibrium and defend the dollar; > to enhance the efficiency and flexibility of our private and public economies; > to widen the benefits of prosperity; > to improve the quality of

109. Biology

Why is it desirable for blood to flow through the capillaries comparratively slowly.

110. math

the price for a stock has decreased from \$24.50 per share to \$18.60 per share. What percentage is the decrease? I am not sure how to figure this. I came up with 24.08% ???

what are mantle convections and plate tectonics?

112. school

Is there any specialized high school for either girls only or girls and boys separate?

113. science

what is the first and fourth planet in the solar system?

114. science

what is the first and fourth planet in the solar system?

115. social studies

what was the first contry to ever have their namke changed?

116. pyschology

As we age, our physical functioning deteriorates. This is most likely due to reduced efficiency in basic cellular processes. One cause of this is thought to be:

117. mental health

i need to know 5 communication skills working with a person that has mental ilness

118. Statistics

In Los Angeles there are three network television stations, each with it own evening news program from 6:00 to 6:30 PM. According to a report in this morning’s local newspaper, a random sample of 150 viewers last night revealed 53 watched the news on

119. English

Can you please tell me which is the best word choice in each sentence? Thank you in advance for your invaluable help!! 1.My friends gave me jewels (?) as Christmas presents. 2.On the following (or the next?) day I took the dog for a walk or for walks. I

120. strategies

how do i find a reference page for medical billing

122. Biology

37. Both animals and plant cells undergo cytokinesis after mitosis ends. How is the process and its outcome the same for both animals and plant cells? How is the process and its outcome different for animal and plant cells? Due to the presence of a cell

123. SUBSTITUTION

HOW TO SOLVE Y=6X-11 & -2X-3Y=-7

HOW TO SOLVE FOR SUBSTITUTION

how long would a tulip live if it had salt mixed in with its water?

126. Math

The standard form of a circle is Ax^2+Cy^2+Dx+Ey+F=0. Write the equation for the circle: Center (1,2), point on the circle (-2,-1). Okay, I've always put circles in the form (x-h)^2+(y-k)^2=0. I got this: r^2=(x-1)^2+(y-2)^2 then I substitute the point to

127. English

How does one cite from this form in APA form? I want to use something that would work for me but I don't know how to cite from this form. Please help.

128. Algebra

Help with this one: 2/3+4t=6t-2/15

129. Math - Beginning Calculus

Why does lim10^(3-x) as x approaches infinity = 0? And why does lim10^(1/x) as x approaches infinity = 1? Are properties of infinite limits involved here?

130. college

A 14-year zero-coupon bond was issued with a \$1000 par value to yield 12%. What is the approximate market value of the bond?

131. math

how do i find the integral of (dx)/(x+2) from 0 to 7?

132. Organic Chemistry

Which of the following compounds has a double bond that is conjugated with the π system of the benzene ring? a. Allylbenzene b. p-Benzyltoluene c. 3-Phenylcyclohexene d. 3-Phenyl-1,4-pentadiene e. 2-Phenyl-1-decene

133. math

"Find a quick and easy method to compute the sum of the first 100 counting numbers."

134. physics

I am getting 0.144 nm for this but I didn't make use of the force. Do you have to use the force? A force of 4.6 x 10-15 N acts between an electric dipole with dipole moment 2.3 x 10-29 C m and an electron. How far away from the dipole is the electron

135. Math

Find the area of the region which is bounded by the polar curves theta =pi and r=2theta 0

136. Maths

Find the area of the region which is bounded by the polar curves theta =pi and r=2theta 0

137. That diet

I have one more question. Is white rice actually made of white, refined flour?

138. SCIENCE

how did the bicycle help other scientist discover or invent things

Solving log functions 1) log x + log(x-6) = log 7

140. english

what is a punctuate

141. health

There are 3 additional reasons why Tele-medicine is advantageous, as noted from UOP material. They are as follows: 1. Reduces the need for small towns to have own set of medical specialists. 2. Patients can stay close to home without having to transfer to

142. algebra

multiply by 3, add 4, divide by 5, subtract 6, result :1 whatis the n

143. history

who was the 34th president?

here's what I'm supposed to do ( you are being accused of being a conspirator -spy- for the Nazi Party. Persuade your accusers -American Patriots- that you are otherwise. ) Please check the paper I wrote below for grammar mistakes please! don't worry about

145. PRAXIS

DOES ANYONE KNOW WHERE I CAN GET FREE INFO ON PRAXIS TESTS??? ANY POINTERS ON THE TESTS??

146. Biology

Why capillaries have very thin walls.

147. Biology

Why veins contain valves.

148. Biology

Is there an experiment which you could do to test the suggestion that veins have more stretchable walls than arteries.

149. Biology

Is there an experiment which you could do to test the suggestion that veins have more stretchable walls than arteries.

150. english

what is the main point in the book the rasin in the sun?

151. Biology

Can you give the speed in the capillaries as a percentage of the speed in the arteries.