Joe Schmo

Most popular questions and responses by Joe Schmo
  1. Chemistry

    Given that the specific heat capacities of ice and steam are 2.06 J/g degrees C and 2.03 J/g degrees C, respectively, calculate the total quantity of heat evolved when 10.0 g of steam at 200 degrees C is condensed, cooled, and frozen to ice at -50 degrees

    asked on April 27, 2011
  2. Chemistry

    In the CO3^2- ion, all three C-O bonds have identical bond lengths of 136 pm. Why?

    asked on October 24, 2011
  3. Chemistry

    Although water and ammonia differ in molar mass by only one unit, the boiling point of water is over 100 degrees C higher than that of ammonia. What forces in liquid water that do not exist in liquid ammonia could account for this observation?

    asked on April 27, 2011
  4. Chemistry

    Copper metal reacts with hot concentrated sulfuric acid solution to form aqueous copper (II) sulfate, sulfur dioxide gas and water. What type of reaction is this?

    asked on August 21, 2011
  5. Chemistry

    What volume does a mixture of 14.2 g of He and 21.6 g of H2 occupy at 28 degrees celcius and 0.985 atm?

    asked on April 5, 2011
  6. Calculus

    A fence 8 ft. tall runs parallel to a tall building at a distance 4 ft. from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?

    asked on January 3, 2011
  7. Calculus

    The rate of change R, in kilometers per hour, of the altitude of a hot air balloon is given by R(t)=t^3-4t^2+6 for time on the interval [0,4], where t is measured in hours. Assume the balloon is on ground level. What is the maximum altitude of the balloon

    asked on January 10, 2011
  8. Chemistry

    When 1 mol of gaseous hydrogen chloride is dissolved in enough water to make 1 L of solution, approximately how many HCl molecules remain in the solution?

    asked on May 15, 2011
  9. Health

    If I were to stay up all night trying to finish my homework (like I am now) will caffeine help, or does it make it harder to work at all?

    asked on February 28, 2011
  10. Chemistry

    In the CO3^2- ion, all three C-O bonds have identical bond lengths of 136 pm. Why?

    asked on October 23, 2011
  11. Physics

    On earth, a certain type of bacteria doubles in number every 24 hours. Two cultures of these bacteria are prepared, each consisting initially of one bacterium. One culture is left on earth and the other is put on a rocket travelling at .866c relative to

    asked on May 25, 2011
  12. Chemistry

    Knowing that 2 aluminum atoms and 3 chlorine molecules react to produce 2 units of aluminum chloride, how many moles of aluminum chloride can be produced by reacting 7.8 moles of chlorine with excess aluminum?

    asked on February 24, 2011
  13. Calculus

    How do you find the indefinite integral of (x^2-29x+5)/(x-4)^2(x^2+3)?

    asked on December 7, 2011
  14. Chemistry

    Three 75.0-g samples of copper, silver, and gold are available. Each of these samples is intially at 24.0 degrees C, and 2.00 kJ of heat is applied to each sample. Which sample will end up at the highest temperature?

    asked on May 1, 2011
  15. English

    Can anyone figure out this riddle?: With sup I'm a brace. You hope is enough; Alone I'm some docks, with sailors and stuff. What am I?

    asked on April 12, 2011
  16. Calculus

    What is indefinite integral of 1/(x^2-4)^(1/2)?

    asked on December 11, 2011
  17. Trig

    What are some real life applications of logarithims?

    asked on April 24, 2010
  18. Physics

    Twelve uniform, thin rods of mass M and length L are welded together to form a hexagon "wheel." What is the moment of inertia of this wheel for rotation around an axis through its center and perpendicular to the plane of the wheel? (The welds contribute no

    asked on November 8, 2012
  19. Calculus

    How would you solve this differential equation? dy/dx=1/2x+y-1

    asked on May 1, 2011
  20. Calculus

    Hello! I am a little stuck (probably because I cannot remember my trigonometric functions). Does anyone know how to solve this equation? [-sin(x)]^2-2cosx

    asked on December 12, 2010
  21. Math

    Please condense the expression. 1/2ln(x^2+1)-4ln1/2-1/2[ln(x-4)+lnx]

    asked on May 9, 2010
  22. Trig

    What are some real life applications of logarithims?

    asked on April 24, 2010
  23. Health

    Is eating a lot of acidic foods at a time unhealthy?

    asked on May 15, 2011
  24. Calculus

    Hello! I am a little stuck (probably because I cannot remember my trigonometric functions). Does anyone know how to solve this equation? [-sin(x)]^2-2cosx

    asked on December 12, 2010
  25. Math

    Please condense the expression. 1/2ln(x^2+1)-4ln1/2-1/2[ln(x-4)+lnx]

    asked on May 9, 2010
  26. Biology

    Please give an example of natural selection that does not include a predator/prey relationship.

    asked on April 21, 2010
  27. Calculus

    Find derivative of (x+1)/(x^2+1)^(1/2)

    asked on October 11, 2011
  28. Spanish

    What is a good sentence that uses the subjunctive tense of "reconciliarse"?

    asked on May 16, 2011
  29. Math

    What is an example of two functions that intersect at least twice in the first quadrant but can neither be a polynomial or a "simple" function (i.e., sin(x), e^x)?

    asked on April 9, 2011
  30. Health

    What is the difference between low and high blood pressure?

    asked on March 20, 2011
  31. Math

    Please solve the equation for x: 8e^3x=24

    asked on May 2, 2010
  1. Calculus

    Thank you very much! I just have one more question for you. How did you get L = 4/cosA + 8/sinA?

    posted on January 4, 2011