1. Physics

Two 10 cm diameter charged rings face each other, 20 cm apart. The left ring is charged to -20 nC and the right ring is charged to +20 nC. What is the force on a 1.2 nC charge placed at the midpoint? I have already calculated the electric field between the

Which of the following functions f has a removable discontinuity at a? If the discontinuity is removable, find a function g that agrees with f for x a and is continuous at a. (If the discontinuity is not removable, enter NONE.) 1. f(x)= (x^4-1)/(x-1), a=1

3. physics

suppose a treadmill has an average acceleration of 4.7 x 10^-3 m/s^2. a. how much does its speed change after 5.0 min? b. if the treadmill's initial speed is 1.7 m/s, what will its final speed be?

4. physics

Three charges are fixed to an x, y coordinate system. A charge of +20 µC is on the y axis at y = 2.7 m. A charge of -14 µC is at the origin. Last, a charge of +46 µC is on the x axis at x = +2.7 m. Determine the magnitude and direction of the net

5. chemistry

The electron in the n = 5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?

6. PreCalc

Let x = the number of non-federal hazardous waste sites and let y = the number of federal hazardous waste sites. The ordered pairs (x, y) below represent the number of sites in eleven states with at least 11, but less than 15 total sites. Alabama (9, 3)

7. literature

if this be error and upon me proved i never writ, nor no man ever loved these lines are an example of a/an

8. Physics

Two 10 cm diameter charged rings face each other, 20 cm apart. The left ring is charged to -20 nC and the right ring is charged to +20 nC.

9. science

How much work is required to lift a 3.7-kg concrete block to a height of 2.7 m?

10. chemistry

There are exactly 60 seconds in a minute, there are exactly 60 minutes in an hour, there are exactly 24 hours in a mean solar day, and there are 365.24 solar days in a solar year. Find the number of seconds in a solar year.

11. Physical Science

.In the early 1900s, two associates of New Zealander Ernest Rutherford bombarded thin sheets of gold with positively charged subatomic particles. They found that most of the particles passed right through the sheets but some bounced back as if they had hit

12. chemistry

Total U.S. farmland occupies 954 million acres. How many square miles is this? (1 acre = 43,560 ft^2 , 1 mile= 5280 ft ).

13. Geometry

The Great Pyramid of Cheops is a right square pyramid with height of 148 m and a square base with a perimeter of 940 m. The Transamerica Building in San Francisco has the basic shape of a right square pyramid that has a square base with a perimeter of 140

14. physics

A charge of -3.35 nC and a charge of -7.00 nC are separated by a distance of 40.0 cm. Find the position at which a third charge of +7.10 nC can be placed so that the net electrostatic force on it is zero.

15. science

2N2O5->4NO2+O2,d[N2O5]/dt=k1[N2O5],d[NO2]/dt=k2[N2O5]andd[O2]/dt=k3[N2O5],the relation betweenk1,k2and k3 is what?

16. Daily Language Review

there family has went to yellowstone national park This is the sentence that I have to correct and I keep getting it wrong. I need help.

17. Physics

The figure shows four electrical charges located at the corners of a rectangle. Like charges, you will recall, repel each other while opposite charges attract. Charge B exerts a repulsive force (directly away from B) on charge A of 4.2 . Charge C exerts an

18. math

Find the standard deviation for the data. Round your answer to one more decimal place than the original data. {15,13,31,42,58,78}

19. History

What was the relationship between President Johnson and the republicans in congress? Plz Help!! Thx

20. History

What did the radicals in congress do to johnson? Was johnson forced out of office? Plz Help!! Thx

21. Social Studies

What did the radicals in congress do to johnson? Was johnson forced out of office? Plz Help!! Thx

22. physics

Three charges are fixed to an x, y coordinate system. A charge of +20 µC is on the y axis at y = 2.7 m. A charge of -14 µC is at the origin. Last, a charge of +46 µC is on the x axis at x = +2.7 m. Determine the magnitude and direction of the net

23. English Communcation 1

Speak aloud each of the following words.Which word has stress on its first syllable: A-Ob.tain B-Fol.low C-Re.new D-De.test

24. physics

What is the kinetic energy of a 26 kg dog that is running at a speed of 8.4 m/s (about 19 mi/h)?

25. science

A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter?

26. Algebra

How long will it take for a car that is traveling at 60 mph to overtake a bus that is traveling at 50 mph if the bus had a 2-hour head start?

27. Chemistry

A sample of 8.44 grams of NaOH is dissolved into 536 mL of aqueous 0.250 M NaOH (assume no volume change). This solution is then poured into 1.96 gallons of water. You may assume that the two volumes can be added.) What is the concentration of NaOH in the

28. Calculus

Compute the average velocity over time intervals [4, 4.01] , [4, 4.001] , [4, 4.0001] , [3.9999, 4] , [3.999, 4] , [3.99, 4] . Use this to estimate the object's instantaneous velocity at t=4 V(4) = ???? ft/ec How do i even approach this problem?

29. Algebra 2

How do I simplify this: 16c-10d+3d-5c?

30. phyical science

On a particular day, the following appliances are used for the times indicated: coffee maker, 40 min, and microwave oven, 23 min. Using the power requirements given in the table below, find how much it costs to use the appliances at an electrical cost of

31. math

Find the standard deviation for the given data. Round your answer to one more decimal place than original data. 2,5,47,11,13,48,39,36

32. chemistry

A precipitate of calcium phosphate is formed when aqueous solutions of sodium phosphate and excess calcium chloride are mixed. If 100.0 mL of 1.5 M sodium phosphate solution is the limiting reactant, how many grams of calcium phosphate can be expected?

33. science

A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter?

34. work/science

A 6.2 "kilo" bag of sugar is on a counter. How much work is required to put the bag on a shelf a distance of 0.41 m above the counter?

35. English

What do you think is a good website which would help me for the great gatsby and hamlet? My Grade 12 english is about to start and I am a 70% student, I don't know how to improve my marks. We have to write essays, unit test on the book which would require

36. College Chemistry

This is my first time taking chemistry and I am VERY confused on the steps foe this problem! Kilocalories to condense 82g of steam at 100 degress C, cool the liquid and freeze it at 0 degress C.

37. physics

The electric field strength 6.0 cm from a very long charged wire is 1700 N/C. What is the electric field strength 10.0 cm from the wire?

38. Chemistry

What is the pH of a 1.0E-8 M solution of HCl? Please note that you cannot simply add the contribution of H+ ions from the autoproteolysis of water and the contribution from the dissociation of HCl. You will need to use the quadratic equation to solve this

39. science

While rearranging a dorm room, a student does 292 J of work in moving a desk 3.7 m. What was the magnitude of the applied horizontal force?

40. Algebra 2 Honor

On one day the value of \$1.00 U.S. was equivalent to 0.77 euro. On the same day \$1.00 U.S. was equivalent to \$1.24 Canadian. Write the function to represent the value of Canadian dollars euros. What is the value of the function for an input of 5 rounded to

41. science

On a particular day, the following appliances are used for the times indicated: coffee maker, 40 min, and microwave oven, 23 min. Using the power requirements given in the table below, find how much it costs to use the appliances at an electrical cost of

42. Geometry

Find the cost of carpeting the following rectangular rooms: a. Dimensions: 6.5 m * 4.5 m; cost = \$13.85>m2 b. Dimensions: 15 ft * 11 ft; cost = \$30>yd2

43. CIS115

A small startup software developer company needs to create a program that will calculate the pay of its employees. For the first version of the program, the company wants the program to accept an employee’s name, the number of hours the employee worked,

44. math

Write the word or phrase that best completes each statement or answers the question. Use the given data to construct a stem-and-leaf plot. The midterm test scores for the seventh-period typing class are: 85,77,93,91,74,65,68,97,88,59,74,83,85,72,63,79

45. chemistry

We conduct an experiment by shining 500 nm light on potassium metal. This causes electrons to be emitted from the surface via the photoelectric effect. Now we change our source light to 450 nm at the same intensity level. Which of the following is the

46. math

Tom sleeps an average of 7.73 hours a day. In one non-leap year, how many hours does Tom sleep?

47. physics (last problem)help

On a calm, bright day, you're scuba diving in a deep lake (n = 1.33), 5.40 m from your sailboat. When you are 3.10 m below the surface, the top of the sailboat mast appears to you to be in a direction 40.0° from vertical. Calculate the height of the mast

48. science

A microwave oven has a power requirement of 1235 W. A frozen dinner requires 6.0 min to heat on full power. (a) How much electrical energy (in kWh) is used? b) If the cost of electricity is 12 cents per kWh, how much does it cost to heat the dinner?

Find the Perimeter and area of each square and rectangle. On my actual paper I have the cm and in behind the numbers along with the area's squared sign I just didn't know how to put that on here. 1. L2 W3 A=6 P=10 2. L1 W1 A=1 P=4 3. L7 W1 A=7 P=16 4. L7

50. chemistry

A jogger runs at an average speed of 5.9 mi/h. If she starts a run at 11:15 am, what time is it after she covers 4.75 x 104ft?

51. math

I have a graph plotted which makes a straight line (linear graph) The points are as follows X , Y (.25, 0.593) (.50, 1.161) (.75, 1.762) (1.0, 2.348) I need to determine the linear range. Also, can Beer's Law be applied?

52. college

Kilocalories to condense 82g of steam at 100 degress C, cool the liquid and freeze it at 0 degress C.

53. english

How would I write a thesis statement for a reflective essay on that many things.. im confused  What character (s) was your favorite? Why?  What character (s) did you dislike? Why?  Do any of the characters remind you of yourself or anyone you know?

54. science

large, flat surfaces in which continental sediments settle are called _______. a) mid - ocean ridges b) continental slopes c) continental shelves d) abyssal plains e) continental margins c

55. Chemistry

Reaction Mechanism Formation of hydrogen bromide takes place as: H2 + Br 2 If the chemical reaction has occured by a mechanism that involves more than one step. What is the reaction occurs by the given mechanism?

56. Anatomy & Physiology

A 32-year-old man has trouble tying his shoelaces, writing, and walking in a straight line. A computed tomographic (special x-ray) scan of the brain would likely reveal that the man has an abnormality in the A. cerebrum B. cerebellum C. brain stem D.

57. math

Reading readiness of preschoolers from an impoverished neighborhood (n = 20) was measured using a standardized test. Nationally, the mean on this test for preschoolers is 30.9, with s = 2.08. a.Children below the 30th percentile are in need of special

58. science

How many kilocalories to condense 82g of steam at 100 degress C, cool the liquid and freeze it at 1 degress C.

59. algebra

Use the discriminant to find out whether this quadratic polynomial can be factored. Factor the polynomial if it is not prime. This polnomial is prime, so I cannot factor it. I just need help with the discriminant part. Thaks in advance for your help.

60. phy

with an average acceleration of -0.50 m/s^2, ho wlong will it take a cyclist to bring a bicycle with an intitial speeed of 13.5 m/s to a complete stop?

61. algebra 2

A chemist mixes some 20% acid solution with pure 100% acid to increase the concentration. How much pure acid and acid solution should be mixed to form 100 milliliters of 40% acid solution?

62. math

Two cars are driving toward each other from opposite directions. If one is driving 55 mph, the other is driving 60 mph and the cars are 500 miles apart, how long will it be before they pass each other? Round to the nearest tenth of an hour

63. algebra

How do I work this to get the answer because I am stuck. Help, Help, please anyone. Ihope that you are able to understand what I am asking. 3 SQRT10 over SQRT15 2 over 5+SQRT3

64. math

Write the word or phrase that best completes each statement or answers the question. Use the given data to construct a stem and leaf plot. The midterm test scores for the seventh period typing class are listed below.

65. math

Write the word or phrase that best completes each statement or answers the question. Provide an appropriate response. The two most frequently used measures of central tendency are the mean and median. Compare these two measures for the following

66. Psychology christian

Hello, for whoever has read the book what 3 main themes can you take from the book Discipleship Counseling by Neil Anderson. I have so far Believers understand tactics of Satan and overcome them successfully but don't know what else. thanks

67. science

While rearranging a dorm room, a student does 292 J of work in moving a desk 3.7 m. What was the magnitude of the applied horizontal force?

68. Physics

The equation for the torque is the same as for the pulley. E.g., the puylling force of the quadriceps muscle acts as a pulley around the rotula, so can I calculate as a torque movement, knowing that the T = Nm (f x r). Thank you

69. Accounting

A May 2002, Business Week story by Stanley Holmes and Mike France entitled “Boeing’s Secret” discusses issues surrounding the timing of the disclosure of information at the giant airplane manufacturer. To summarize, on December 11, 1996, Boeing

70. Math

Please check my answer: Multiply and simplify (8a^7)/(11p^3) * (121p^8)/(64a) I got (968a^7p^8)/(704ap^3) Is this correct?

71. Professional Writing

how can the formatting of business messages received effect their level of success whether its a professional or customer reading? I feel as if it doesn't have any impact on the level of success, is their a wrong way to format business messages according

72. english

I am required to write 2 different paragraphs for a Penn Foster Assignment. In paragraph 1 I am to bring a polished paragraph on what inspired me to choose my career and why. The second paragraph is about an e-mail to my cousin about a job opening she

73. Math

I came up with no solution for this equation. Could someone please let me know if I am correct? If not, I will try again, but I have already tried it 3 times. [x/(x+5)]-[5/(x-5)]=(x^2+25)/(x^2-25)

74. college

I need to know calories to warm 58mL of water from 10 degress C to 100 degress C and vaporize it at 100 degress C.

75. science

scientists believe that the waters covering the surface of the earth. a)are a recent addition to our planet b) first appeared during the age of dinosaurs c) have been here since the crust solidified d) are slowly drying up e) are not visible from space c

76. accounting

initial investment in the company of \$26,200 cash. Here are the assets and liabilities for the month of June, its first month of operation. Cash \$4,600.00 Accounts receivable \$4,000.00 Revenue \$7,000.00 Supplies \$2,400.00 Advertising expense \$400.00

77. entrepreneur

Describe how the owner uses capital and human resources to ensure revenue or control cost

i am readin this book called "the wave" i am lookin for the answer n i cant find it...can sumone please help me...this is the question...explain the requirements for participating in "the wave" experiment and how they were monitored. evaluate if they were

79. math

The perimeter of a rectangular backyard is 6x + 6 yards. If the width is x yards, find a binomial that represents the length.

80. Physics

The vector A -5.2 has a magnitude of 38m and points in the positive x direction. What is the x component of vector A? What is the magnitude of vector A?

81. Chemistry

What is the pH (to three figures) of a 0.1 M solution of sodium acetate given that the acid dissociation constant (Ka) of acetic acid is 1.8E-5? Hint: I keep getting 2.87 but its wrong.

82. math

Jimmy is traveling at a speed of 135 miles per hour (mph). What is his speed in feet per second? Include units in the calculation to show the unit conversion.

83. math

For the pair of numbers (-1/5),(-1/2) My teacher wants us to find the quadratic equation with integral coefficients that has these numbers as solutions. I am not sure if I have the right equation for this. Could someone let me know if I am right or wrong

Need help writing a sentence using the word lateral in it.

85. physics

as the shuttle bus comes to a sudden stop to aboid hitting a dog, it sccelerates uniformly at -4.1 m/s^2 as it slows from 9.0 m/s to 0 m/s. find the time intercal of acceleration for the bus.

86. Math

An aircraft manufacturer determines that one of it's aircrafts has twice as many seats as another. Find the number of seats for each aircraft if the total number of seats is 336.

87. physics

An 18-year-old runner can complete a 10.0 km course with an average speed of 4.51 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.31 m/s. How much later (in seconds) should the younger runner start in order to finish the

88. American History

Well, it's been 9 years since 9/11 and I was shocked when it happened. Why did the people and the government of the States not see this coming?

89. Algebra

In 1992, the life expectancy of males in a certain country was 68.3 years. In 1998, it was 71.1 years. Let E represent the life expectancy in year t and let t represent the number of years since 1992. The linear function E(t) that fits the data is...

90. Biology

Which onf of the following statments about sense resceptors is trus? A) Chemicals, light and pressure convert stimuli into electrical impluses. B) Electrical impluses within the nerve pathways trigger an awareness of stimuli in the sensory receptors. c)

91. Finance

suppose you have \$12000 to invest. if part is invested 10% and the rest at 15%, how much should be invested at each rate to yield 12% on the total investment?

92. math

patty bought 24 yards of fencing to put around her garden. she only used 20 yards. how many feet of fencing did she have left over?

93. english

Using Beowulf as your model,summarize which virtues the Anglo-Saxons thought to be important in their leader? I have come up with so many I don't know which to cut it down to. Please help

94. Biology

Profiles of which component of the membrane may be used to identify certain kinds of pathogens? a)proteins b)polysaccharides c)leaflets d)phospholipids e)fatty acids Barely ____________% of all microbial species can be cultured in the laboratory. a10 b)25

95. algebra

This should be simple ( and it probably is). [5-27].-5 divided by -5 -22.-5= 110 divided by -5 = -22 They said this was wrong! -5.-22=+110? Right? Please help my scattered brain!

96. chemistry

If the atmospheric pressure is not corrected for vapor pressure of water, what effect will this have on number of moles of oxygen calculated? Use numbers from your experiment and determine the percent deviation caused by this omission. Is this a

97. science

The oceans help provide an exchange of gases with the atmosphere by dissolving a) oxygen b) carbon dioxide c) volcanic ash d) all the above e) a and b only e

98. math

Could someone show me how to solve this problem? I am trying to do it myself.I just want to make sure I am going about it the right way. Thank you. z=(SQRTx^2+y^2) (9)^-3/2 (8)^2/3

99. Abnormal Child Psychology

Which of the following is true regarding the relationship between ODD and CD? A. most children who display ODD go to to later develop CD. B. There's no relationship between ODD and CD. C. CD is almost always preceded by ODD. D. ODD is almost always

100. science

Scientists believe that the waters covering the surface of the earth? a) are not visible from space b) are slowly drying up c) first appeared during the age of dinosaurs d) are a recent addition to our planet e) have been here since the crust solidified

101. College chemistry

This is my first time taking chemistry and I am VERY VERY confused On the step involved to find out how many calories to warm 58mL of water from 10 degress C to 100 degress C and vaporize it at 100 degress C.

102. Physics

(Vectors) If |A x B| = 6.45AB, what is the angle between A and B?

103. english

Are the themes in Beowulf anachronous in today's world?

104. Math

Add. Simplify, if possible. 4d/(5d-10) + 2d/(10d-20) I am simply having a difficult time with this one. Could you please just get me started? Thank you in advance!

105. Physics

Vector A points in the negative x direction. Vector B points at an angle of 29.0 above the positive x axis. Vector B has a magnitude of 17m and points in a direction 46.0 below the positive x axis. Given that A+B+C=0 Find magnitude of A and B

106. Calculus

Evaluate the integral from 2/sqrt2 to 4; 1/(t^3 sqrt(t^2-4))?

107. design

rewrite them using performance objectives/ 1. Understand how a car works 2. Know how to write a term paper using APA format 3. Comprehend the differences between mammals and reptiles 4. Know how to write a performance objective 5. Use JavaScript

108. intermediate algebra

Evaluate the exponential equation for three positive values of x, three negative values of x, and at x=0. Show your work. Use the resulting ordered pairs to plot the graph; submit the graph via the Dropbox. State the equation of the line asymptotic to the

109. child care

What do incubation stage me? If a child have been coloring and drawing shortly sfter she complains of headaches and her eyes feel sleepy? 1.amblyopia 2.myopia 3.hyperopia 4.strabsimus this answer i just don't know !

110. english

The virtues I have found in Beowulf are.Loyalty,Courage,Strength,Religion and Religious Principles,Heroics,Honor,Valor. Which do the Anglo-Saxons value most? And why because to me it seems that all are important.

111. physics

A student drops a ball from the top of a tall building; the ball takes 2.4 to reach the ground. What was the ball’s speed just before hitting the ground? (this is excluding everything like air resistance, etc)

112. science

the unit of zero order rate constant is what?

113. math

Search: ralph's clothing company has an order for 20 skirts to be made from a bolt of fabric that has 28 1/4 yd of fabric. the customer wants as many flared skirts as possible, and the rest can be straight skirts. a straight skirt uses 1 1/4 yd of fabric,

114. math

write an equation of the line containing the given point and parallel to the given line; use y=mx+b form; (5,8) x+4y=7 i keep getting this wrong. Can someone show me how to work this? Thank you so much

116. Biology

Profiles of which component of the membrane may be used to identify certain kinds of pathogens? a)proteins b)polysaccharides c)leaflets d)phospholipids e)fatty acids Barely ____________% of all microbial species can be cultured in the laboratory. a10 b)25

117. chemistry

Vapor pressure ___________ as the temperature of the liquid in equilibrium with it decreases.

118. math

ok is the answer x=6 for this problem which is (2)/(3)(x+6)=0?

119. math

ok is the answer x=6 for this problem which is (2)/(3)(x+6)=0?

120. Math

Solve 1/w=7/w-1/3

121. economics

Which economic system works best when there is a crisis of epic proportion?

122. algebra

Did I do this problem right? (3^3/3)^2= 3^6/3^2= 3^4= 81.

123. algebra

I don't understand how to do this, so please help. Could you show the steps , so I can try it own my ow to see if I can get it.Thank you. 2SQRT4t^9z^2.

124. anatomy

I can't seem to find the answer to this question anywhere, thanks. There are 3 components to the true scalp? T/F

125. math

I need to see step-by-step how to find an equation of line containing pairs of points: use y= mx+b form. (-7,-8), (-3,-6) Here is what I have so far:slope(m) is 1/2 y-(-8)=m(x-x1) y-(-8)=1/2(x-x1) y-(-8)=1/2x-(-7) y-(-8)=1/2x-(-7/2) I think this is where I

126. Professional Writing

What does it mean to use a "process-oriented approach" in writing?

Solve -0.8x

128. Calculus

How do I find the instantaneous ROC at x=1.5

129. History

How did the tensure of office act affect the president's ability to decide who was in his cabinet?

130. sci/241

how does society as a whole know what the laws on the books are?

131. algebra

Evaluate the logarithmic equation for three values of x that are greater than 1, three values of x that are between 0 and 1, and at x=1. Show your work. Use the resulting ordered pairs to plot the graph; submit the graph via the Dropbox. State the equation

132. mgt 450

can som one explain the changes in environment and in the industry’s or company’s evolving strategy.

Ok, I am going to grade 12 and my university requires a 90% for advanced functions. In grade 11, I got a 78% with no tutoring. Is there who is willing to help me free of cost for tutoring or even websites that would help me.

134. Microbiology

Profiles of which component of the membrane may be used to identify certain kinds of pathogens? a)proteins b)polysaccharides c)leaflets d)phospholipids e)fatty acids Barely ____________% of all microbial species can be cultured in the laboratory. a10 b)25

135. English

What is the theme of the book Corduroy by Don Freemen and why?

136. art

Write a summary comparing the characteristics and innovations of each Greek and Roman architecture in 200 to 300 words. · Provide two representative examples of architecture for each Greek and Roman cultures.

137. math

peter has 3 different kinds of buttons in one box. there are 124 more ivory buttons than plastic buttons and 1/3 as many wooden buttons as ivory buttons. there are 72 wooden buttons. how many plastic buttons are there?

138. Financial Accounting

Where can I find several small articles on business and accounting ethics?

how do i solve for y in the equation -5y(6y - 6) - y = -4(y - 5)

140. childcare

Mrs Sue please help with checking my answers,TKS 1. Today in class you’re going to talk to your students about Vitamin C and what it does for a person’s body. From which one of the following food groups should you select your snack for today? A. Bread,

141. science

water in a wave moves in a _____, but not very far forward. just need to know if my answer right or wrong. circles or circular

142. criiminal justice

what makes law differ from those on the books to those in action. don't all laws have an action component?

143. science

I need to know how many calories to warm 58ml of water from 10 degress C to 100 degress C and vaporize it at 100 degress C.