Popular questions and responses by Maryanne
  1. History

    Do you agree with Darwin's idea of natural selection. Why or why not. Give minimum of 3 examples. thanx

    asked on October 25, 2008
  2. Trigonometry

    If sin A = 3/5 and cos B = 24/25 and

    asked on March 23, 2013
  3. English

    Is this correct : I have never watched a most frightening film in all my life

    asked on May 12, 2020

    Suppose you had a detection device that could count every decay event from a radioactive sample of plutonium-239.052156 (t1/2 is 24,000 yr). How many counts per second would you obtain from a sample containing 0.126 g of plutonium-239? (The mass of Pu-239

    asked on September 5, 2012
  5. physics

    What is the total resistance in a parallel circuit with a 10 ohm lamp and a 15 ohm lamp?

    asked on May 24, 2010
  6. Math

    Let f(x) = x+2/x-1. Find a function g(x) so that f(g(x)) = x. How do I solve this? I’m stuck on what to do. Thank you!

    asked on October 10, 2019
  7. Math

    23. Lois built a rectangular flower bed. She used four boards for the border of the flower bed. Two of the boards were 4 feet long. The other boards were 8 feet long. a. What was the area of the flower bed using these boards? b. She decided to cut each

    asked on November 6, 2016
  8. Derivatives

    with respect to x f(cos x) if f'(x)= 1/x find (f(cos x))' i got tan x sec x this is wrong. can you explain thank you

    asked on March 20, 2013
  9. Derivative

    Find dy/dx for the following: 1) x^3 + 3x^2*y + y^3 = 4 I get -3(x+2y)/x^2 + y^2 it's wrong though. 2) x + y^2= xy^2 I get y^2 + 1/ 2y- 2xy this is also wrong. can you explain thanks

    asked on March 20, 2013
  10. Soial Work

    Discuss a case fro the NM court which has used a ruling involving the Tarasoff case

    asked on June 6, 2012
  11. HIS 103

    why didn't Byzantium have much more cultural influence farther west, rather than in eastern and southeastern Europe?

    asked on June 2, 2012
  12. HIS 103

    What made Byzantium "Roman" other than its formerly being part of the Roman Empire? How Roman was it when it spoke Greek and, after the 11th century, was no longer Catholic?

    asked on June 2, 2012
  13. HIS 103

    Good overview; how did Eastern Orthodox Christianity (which split from the Catholic Church in the mid-11th century) differ from Rome in its basic concepts and worship style?

    asked on June 2, 2012
  14. HIS 103

    Was a more fluid social structure, with more change and mobility somehow not diserable in the caste system

    asked on May 26, 2012
  15. Math and Society

    Which solid has the greatest volume? a)A right cylindrical cylinder with a radius of 4 inches; b)A cube with a side of length of 4 inches; or c) a sphere with a radius of 4 inches?

    asked on May 5, 2012
  16. microbiology

    Lactobacillus species ferment glucose, as demonstrated by the snyder test. What other metabolic functions might they perform judging by the list of ingredients: Yeast extract, agar, sodium chloride, pancreatic digestive casein. Thank you

    asked on March 23, 2011
  17. Chemistry

    If a 6.00M solution of sodium hydroxide occupies 520 mL of space how many grams of NaOH is dissolved in the solution? (Remember M = moles/L). And the work.

    asked on September 30, 2010
  18. Chemistry

    The density of oak lumber is approximately 800km/m^3. What is the mass in grams of 4 cubic meters of oak? And the work.

    asked on September 30, 2010
  19. Chemistry

    What is the mass in grams of 4.556 x 10^30 lead atoms? Also the work.

    asked on September 30, 2010
  20. health fraud- hair products

    ok so i have to pick a product basically that is like a fraud and it has to be a hair product. then i have to write a summary about it. so i was thinking a product that claims it can grow hair and stop hair lose. Does anyone know of any products like that,

    asked on September 4, 2010
  21. math

    provide a counterexample to show that each statement is false. a) if a four sided figure has four congruent sides, then it has for right angles. at first i thought of a trapezoid proves that wrong but then i remembered only 2 sides have to be congruent for

    asked on September 1, 2010
  22. conformity paper

    Just to say first im not wanting anyone to write my paper for me. I have to write an english paper about non conformity and conformity. I already have a load of information but Im looking for a little more. directions:observe conformity as it exists in

    asked on August 28, 2010
  23. chemistry

    28.06 mL to grams

    asked on August 26, 2010
  24. chemistry

    to DrBob222 wouldn't it be like this then 4.86L/12.75kg*1000cm^3/1L*(1kg/1000g)^3

    asked on August 26, 2010
  25. chemistry

    An aluminum engine block has a volume of 4.86 L and a mass of 12.75 kg. What is the density of the aluminum in grams per cubic centimeter?

    asked on August 26, 2010
  26. Social Studies.\ASAP PLEASE

    What factors shaped the move from colonial, country life to modern, urban life? What was urban city life like during the rise of urbanization? How was it different or similar to modern urban life? Can you help me? I have not heard from my teacher about

    asked on April 7, 2010
  27. Chemistry

    Can someone please check this for me? C4H8+5O2-->3CO2+4H2O+C Butane is a gas and .01 g of it is burned. Is .00218 g of carbon the result? Thanks

    asked on November 1, 2009
  28. college chemistry-thermochemistry

    i have one more question: I know this one has to do with hess's law but i'm not sure of how to get the enthalpy of vaporization from this? Clculate the enthalpy of vaporization of solid potassium bromide to a gas of ions, the process

    asked on November 8, 2008
  29. college chemistry-thermochemistry

    A 1.50g sample of NH4NO3(s) is added to 35.0g of water in a foam cup and stirred intil it dissolves. The temperature of the solution drops from 22.7 to 19.4 degrees celcius. What is the heat of dissolution of NH4NO3, expressed in kJ/mol NH4NO3?

    asked on November 8, 2008

    The fossils are preserved with chemical in order to assist scientist with educational research or future DNA testing

    posted on June 28, 2017
  2. Math

    I am unable to make the figure (with both boards) to begin with...

    posted on November 6, 2016
  3. math

    oh its a rhombus! Thank you!

    posted on September 1, 2010
  4. heath care

    If you search the reading material for the patients name you will find the information needed to answer the first scenario. Just type "Myelin" into the adobe reader search bar.

    posted on April 6, 2010
  5. Chemistry

    Thank you very much!

    posted on November 1, 2009
  6. college chemistry-thermochemistry

    thanx so much!

    posted on November 9, 2008
  7. college chemistry-thermochemistry

    ya you're right i accidently put the wrong value in!

    posted on November 8, 2008
  8. college chemistry-thermochemistry

    i have one more question: I know this one has to do with hess's law but i'm not sure of how to get the enthalpy of vaporization? Clculate the enthalpy of vaporization of solid potassium bromide to a gas of ions, the process KBr--->K{+1}(g)+Br{-1}(g), from

    posted on November 8, 2008
  9. college chemistry-thermochemistry

    I got: delta H= 482.79J 482.79/150gNH4NO3 x 80gNH4NO3/mol NH4NO3 =2574.88J/mol =2.575 kJ/mol Is this right?

    posted on November 8, 2008