# pamela

Most popular questions and responses by pamela
1. ## Chemistry

A zinc-copper battery is constructed as follows at 25°C. Zn|Zn^2+ (0.15 M)||Cu2+(3.00 M)|Cu The mass of each electrode is 200. g. a) Calculate the cell potential when this battery is first connected. - i got this to be 1.14V b.) Calculate the cell

2. ## Algebra

Consider the equation 4x^2 – 16x + 25 = 0. (a) Show how to compute the discriminant, b^2 – 4ac, and then state whether there is one real-number solution, two different real-number solutions, or two different imaginary-number solutions. (b) Use the

5. ## chemistry

what is the total mass of Rn-222 remaining in an original 160-mg sample of Rn-222 after 19.1 days?

6. ## Social Studies

1. describe the achievements of the Maya, Inca, and Aztec. 2. what were the major similarities and differences between the Maya, Inca, and Aztec? 3. why did the Europeans begin to explore? 4. How did the Spanish conquer the Aztec and Incan empires?

7. ## s

According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about

8. ## Chemistry

In this balanced equation 4Al + 3O2 = 2Al2O3. When 0.54 mole aluminum is reacted in a closed container with 7.80 g oxygen, how many grams of aluminum oxide can form. Please show steps to work out. Thanks

9. ## math

A ship leaves POrt P and sails 28km away on bearing of 70 degrees to POrt Q. The ship then turns on a bearing of 160 degrees and sails 21km to POrt R. Find angle PQR, calculate the distance PR, Determine the bearing of R from P. angle PQR = 180 degrees -

10. ## college chemistry

How much heat is needed to convert 2.00 kg of liquid ammonia at -40.0 oC to its vapor at -11.0 oC? The specific heat of liquid ammonia, NH3 (l), is 4.70 J/g-K and that of the vapor NH3 (g), is 2.20 J/g-K. The enthalpy of vaporization of ammonia is 23.3

11. ## Europe

how did europe's geography affect its development?

12. ## Science

2.1 Two blocks of mass M kg and 2.5kg respectively are connected by a light, inextensible string. The string runs over a light, frictionless pulley ,The blocks are stationary 2.1.1 calculate the tension in a string The coefficient of static friction

13. ## Math

Gina plans to invest $12,000, part at 4% simple interest and the rest at 6% simple interest. What is the most she can invest at 4% and still be guranteed at least$650 in interest per year?

14. ## Physics

A runner runs around a circular track with a radius of 50m.if he runs half way round the track from a to b.am i correct if i say his distance is 100m?

15. ## Calc

Radioactive radium () has a half-life of 1599 years. What percent of a given amount will remain after years?

16. ## Research and Design

What changes did the Census Bureau make to the conceptualization and operationalization of race in the 2000 census?

17. ## math

Mr. Howard wrote the following expressions on the board in order to determine which expressions are equivalent and how they are equivalent. 60x+24, 3(20x+8, 4(15x+6) Explain which of these expressions are equivalent using properties of operations, and then

18. ## chemistry

our lab experiment was Isolationa nd Identification of the Major Constituent of Clove Oil. We know the major component is Eugenol, but our professor wants us to write the equations for the extraction of eugenol from the distillate with dichloromethane and

19. ## Conflict Management Communications

Provide 2 examples of passive aggressive societal groups and behaviors. I thought the KKK would be one good example, any other thoughts would be most appreciated! Thank yoU! :)

20. ## math

Suppose the 435 members of the house of representatives are placed on committees consisting of more than 2 members but fewer than 30 member of members and each member is to be on one committees. Each committee is to have an equal number of members and each

21. ## Chemistry

4Al + 3O2 = 2Al2O3. If 41.5 g aluminum and 69.0 g oxygen undergo a reaction that has a 67.0% yield, What mass of aluminum oxide forms. Please help by showing steps to find answers. Thanks

22. ## chemisty

14KMnO4+4C3H5(OH)3----->7K2CO3+7Mn2O3+5CO3+16H2O how to do it help me if you can I spend days to find this but I couldn't please help mee.....

23. ## Calculus

Derivative of the implicit Function: arctan(x^5y)=xy^5 Here is where I am at. I am pretty frustrated: arctan(x^5y)-xy^5=0 1/1+(x^5y)^2 * (d/dx(x^5)*y+x^5*d/dx(y))-(d/dx(x)*y^5+x*d/dx(y^5))=0 1/(1+x^5y)^2 * (5x^4y+x^5dy/dx) - (y^5+x^5y^4dy/dx)

24. ## Social Studies

1. Describe social, political and economic aspects of spanish rule in the Americas. 2. How did the first Global Age affect culture? 3. Why did the slave trade prosper? what effects did it have on Africa? 4. How did the colonization of the Americas affect

25. ## Math

There are 20 bottles in a box. Each bottle weighs 1 3/4 pounds. How many pounds do all the bottles weigh together?

How do you figure out the place value of the stem and leaf of a stem-and-leaf plot???????????????

27. ## science

Which of the following is a reason to use parallel sentence structures in a literary analysis essay?

40. ## HELP

How do you find acceleration and Fnet for a diagram containing only one object with a mass, like say 10kg, and two arrows going in the opposite directions(horizontally) with thier tips touching each side of the object. **NOTE: there are no other numbers

41. ## math

On Monday, Carlos ran 1/8 of a mile. On Wednesday, he ran 5/6 of a mile. Carlos ran 3/8 of a mile on Friday. Which day did Carlos run farthest?

42. ## Global Help!

Describe social, political and economic aspects of spanish rule in the Americas. I cant find this answer anywhere help please!!

43. ## math

Brenda's dog is 5 times as long as Hugh's dog. Together the dogs are 48 inches long.How many inches long is Hugh's dog?

44. ## Media Law

What are the most pressing challenges facing U.S. copyright enforcement interests today in the context of the proliferation of overseas, especially third-world copyright piracy?

45. ## S.S

What powers does the Executive Branch have over Legislative Branch?

46. ## social studies

if you do it once, it's good. If you do it twice on the same day, it's a serious crime. what is it? One possibility is getting married (to different people). However, both don't need to be done the same day to be a crime. I hope this helps. Thanks for

47. ## Science

How has the study of cells affected science today?

48. ## Maths

Lucas will be twice his brothers age in the next four years. If lucas's brother is now 6 years old, how old is lucas?

49. ## Healthcare

Identify 3 tools from the CMS website that are helpful to achieving the goals set forth by an organization?

50. ## Statistics

A standard deck of cards contains 52 cards. Of these, 12 are face cards (kings, queens, and jacks), 13 are hearts, 13 are clubs, and 3 of these are both hearts and face cards. A card is drawn. What is the probability that the card is either a jack of

51. ## Chemistry hnrs

what is the electron configuration of vanadium?

52. ## Physical science

The engine of a car is being lifted out of the car by using a pulley system. The weight of the engine is 8000N. Use a scale diagram to determine the horizontal force, F1 that a mechanic has to use to hold the engine in such a position that the rope makes

53. ## Intermediate algebra

The current in a typical mississippi river shipping route flows at a rate of 4mph. In order for a barge to travel 24mi upriver and then return in a total of 5hr, aproximately how fast must the barge be able to travel in still water?

54. ## math

what is 216.3 divided by 10.5? please show the work

55. ## chemistry

What information does this value of Kc indicate with regard to the amount of NO(g)in the equilibrium mixture at a 25 degrees celcuis?THe cointainer is heated and the system reacheas a new equilibruim at 2500 degrees celcuis at this temperature there 0,4

56. ## Survery of Modern and Contemporary Art

I have to compare and contrast Rococo Architecture and Art Nouveau with political elements as well as historical relevance. I am having troubles finding information on these. Could you help me compare and contrast these, political elements and historical

Sara is 1/4 the age of her father. Sara's father is 60. How many years older than Sara is Sara's father? _____ How many years ago was Sara 1/10 of her father's age? _____ How old was she then? ____

58. ## Physics

How do you find acceleration and Fnet for a diagram containing only one object with a mass, like say 10kg, and two arrows going in the opposite directions(horizontally) with thier tips touching each side of the object. **NOTE: there are no other numbers

71. ## Environmental Science

I was wondering what are some natural resources needed for survival and the consequences for not having those resources. I would like some research cites or cite your resources(where you got the info)

Marta's mother is 5 times as old as Marta. Marta's mother is 25. How old is Marta? ______ In a few years, Marta's mother will be 3 times as old as Marta. How old will Marta be then? ______ How old will Marta's mother be? ______

73. ## Algebra/Pre-Calc

Find the values for a and b such that f(x) is continuous on the interval 0 < or = to x < or = to 13. { 2x^2, 0 < or = to x < or = to 3 f(x) = { ax + 3, 3 < or = to x < or = to 7 { b, 7 < or = to x < or = to 13 Can someone explain? Am I suppose to find the

74. ## social studies

I'm writing an essay and would like to examine a few people's different opinions on this question in order to help me choose my own: Is the present US action in Iraq imperialism? Why? Thanks! You might browse the following search for ideas.

75. ## math lit,business studies,accounting and computer

Can I be an accountant when doing these subjects?

76. ## Algebra

Please help me find the value of the annuity for the following: a1= $8000, I=0.06, n=10$8,000 invested for 10 years at 8% compounded annually\$8,000 invested for 10 years at 0.06% n = 10 Thank you.

77. ## Science

What happens when TCDD binds to the AhR receptor? How does it cause diseases/health problems in people?

78. ## geometry

An open rectangular glass tank with a horizontal base PQRS measures 80 cm by 50 cm by 34 cm. 110 liters of water is poured into the tank. v The tank is tilted towards edge PQ until the water just reaches the edge TU. w Calculate the value of d. s

79. ## College Algebra

Evaluate the function y=2.55^(x+1) at the value x=1.83

80. ## strayer

For this Discussion, read the following scenario, and then address the following question in 1–2 paragraphs: For the month of August, 12 new cases of tuberculosis and 12 new cases of West Nile virus infection were reported to a county health department.

81. ## IT/236

List three things that a Web designer must consider and understand about the purpose or target audience prior to site development. Why do you feel each of these is important to a successful plan?

82. ## Math

Express the quantified statement in an equivalent way. Some students are bored. Would it be Not all students are bored?

83. ## biology

A group of specialized cells that transport fluids and nutrients is called a. a multicellular autotroph b. a methanogen c. an aggregation d. vascular tissue A?

84. ## Math

If a car is driven 372 miles in 6.5 hours, then what is the average number of miles per hour?

85. ## Writing in Math

Every digit in 8,999 is greater ,than any digit in 24,005 is greater than 8,999.

86. ## Algebra

Let x = log_2 1/8 Write the exponential form of the equation and solve the equation for x.

87. ## Algebra

Suppose A is the amount borrowed, r is the interest rate (in decimal form), and m is the total number of monthly payments. Let w = (r)/(12) Then the formula to determine the monthly payment amount for a loan is given by (Aw)/1-(1)/(1+w)^m Suppose Alice

88. ## English

A)why was France willing to sell Louisiana, and why did the united states purchase it? B)What was the purpose of Pike's expedition, and where did he travel?

89. ## U.S. history

What were the requirements and benifits from being a robber baron in the 1800's?

90. ## environmental science

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

91. ## physics, social studies

The amount of water needed daily by plants for photosynthesis, cell growth, and cell maintenance is very small, and yet plants require large volumes of water in order to live. It is estimated that over 90 percent of the water absorbed by plants is lost

92. ## Math-precalc

Is it possible to find a rational function that has x-intercepts (-2,0) and (2,0), but has vertical asymptote x=1 and horizontal asymptote of y=0? The horizontal asymptote and the x-intercepts parts stump me. If you can't reach y=0, then how can you get

93. ## world history

during the peloponnesian war the greek civilization suffered from political collapse.does that mean that the greek civilization fell? compare this situation with that of the ancient chinese civilizations. http://en.wikipedia.org/wiki/Peloponnesian_War The

94. ## Geometry

I know that a rectangular room measures 2300 sq. ft, how long and how wide would the rectangle be?

95. ## economics

are there any welfare or subsidy payments that should be received or added

96. ## math

5hexponent2/5 =3645/5 find the value of h

97. ## math

Write an equation which models how old in years each of you will be when you are three times as old as the younger person use age 10 and 48?

98. ## physics

A stationary speaker is emitting a sound of frequency 1330 Hz. The air has a temperature of ^oF. Taking right to be positive, a person is moving toward the source (to the left) at 8.2 \frac{m}{s}. The person will hear a frequency of ... f =

99. ## physics

A ball is projected upwards from a platform 8m above the ground,with an initial velocity of 3m/s.How long does it take for the ball to reach the ground.