# pamela

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. ## economics

the problem of what to produce in south africa is solved by?

5. ## 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

6. ## 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 -

7. ## Europe

how did europe's geography affect its development?

8. ## 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?

9. ## 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

10. ## Maths

ABC is an isosceles triangle in which the equal sides are AB and A.If AD is an altitude and |BC|=1/2|AB|.Prove that |AD|^2=15|BC|^2

11. ## Chemistry

What is the frequency of light having a wavelength of 5.6 micrometers?

12. ## epidemiology

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.

13. ## Science

State the effects of over-secretion and under-secretion of somatotrophin,thyroxine,insulin,ADH,oestrogen,testrosterone.

14. ## FRENCH ! (:

Dialogue practice: Please check my grammar and sentence structure. This is meant to be an interview dialogue. ** whatever is in () I know I have to add the accents later on. I just wasn't able to on my device now. 1.) Qu'est-ce qui arriv(e) heir? (what

15. ## algebra

t/2 + t+3/3t = 1/t I got the lcd of 12t I stuck at the step of solving and i'm not getting t=-4

16. ## Chemistry hnrs

what is the electron configuration of vanadium?

17. ## Calc

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

18. ## Thesis statement

I need to write my own classification and division Essay of 200 words about the versions of English spoken using mother tongue as a sample. I'm having Trouble developing a good thesis statement. Please help!

19. ## College Algebra

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

20. ## 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

21. ## 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

22. ## 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

23. ## 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?

24. ## 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

25. ## Mathematics

Find the number of ways,the digits 0,1,2,3 can be permuted to give rise to a number greater than 2000.

26. ## Physics

A machine has a velocity ratio of 5.it requires a 50kg weight to overcome a 200kg weight. Calculate the efficiency of the machine (g=10ms)

27. ## 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

52. ## 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

53. ## Life orientation

What, according to the BCEA with regard to the contraventions in work place?

54. ## 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

55. ## Science 2

How does TCDD act as an endocrine disruptor?

56. ## Science

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

57. ## Science

what does LD50 stand for in science terms?

58. ## Science

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

59. ## Science Biology

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

60. ## science

what are atoms

61. ## 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

62. ## Classical Mythology

Throughout this film, characters appear, or things happen, that are reminiscent of people or events in classical mythology. What do they make you think of? Pick 4-5 things (people, incidents events, costumes, whater) and explain waht they remind you of

63. ## 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

64. ## Thesis statement

I need to write my own classification and division Essay of 200 words about the versions of English spoken using mother tongue as a sample. I'm having Trouble developing a good thesis statement. Please help!

65. ## 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.....

92. ## 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?

93. ## Writing in Math

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

94. ## Algebra Help

Let x = log_2 1/8 Write the exponential form of the equation and solve the equation for x. Does this work? Thanks! Exponential form is 2^-3=1/8 To Check: 2^-3=1/2^3=1/8

95. ## Algebra

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

96. ## science

scientist do their experimental test more than once so they can reduce the effects of chance errors this is called conducting what

98. ## 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)

99. ## 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