Homework Answers Page 10663

• How do you simplify ##sqrt((1/18))##?

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  Algebra

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• How do you change 1656 kPa to atm?

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  Chemistry

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• What is the difference between proper and improper fractions?

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  Algebra

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• Explain the quaternary structure of proteins.

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  Biology

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• What is the percent ionization in a 0.15 M solution of HF? (is it possible to calculate percent ionization with only molarity?)

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  Chemistry

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• What is the tropopause and what is significant about it?

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  Science

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• Why is PtCl4^2- square planar?

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  Chemistry

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• The perimeter of a regular hexagon is 48 inches. What is the number of square inches in the positive difference between the areas of the circumscribed and the inscribed circles of the hexagon? Express your answer in terms of pi.

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  Geometry

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• How do you convert 8 milliliters to fluid ounces?

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  Chemistry

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• How does bile get to the small intestine? How do the enzymes produced by the pancreas get to the small intestine?

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  Psychology

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• What is the difference between atomic mass, atomic weight, and mass number?

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  Chemistry

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• What is the molecular shape of phosphorus trichloride (##PCl_3##)? What are the bond angles in this molecule?

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  Chemistry

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• How do you convert 190 mm Hg to atmospheres of pressure?

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  Chemistry

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• A clock with an iron pendulum keeps correct time at 20C.How much will it lose or gain per day if temperature changes to 40C?Coefficient of cubical expansion of iron =36x10-6C-1

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  Physics

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• Why does NaH2PO4 become acidic in water? I thought this reaction would yield NaOH and HPO4- and NaOH is a strong base! Please explain what happens to the sodium ION. Does it accept a hydroxide?

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  Chemistry

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• Why do you think Operation Rolling Thunder failed to lead to a quick victory?

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  History

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• How do you solve ##sin(60-x)=2sinx##?

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  Geometry

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• What is the biggest planet in our galaxy?

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  Science

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• The density of copper is ##8.96 "g/cm"^3"##. The density of zinc is ##7.14 "g/cm"^3"##. A sample of brass has 70% copper and 30% zinc by mass. What would be the density of this brass sample?

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  Chemistry

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• How do you use a graphing calculator to find the limit of ##(12(sqrtx-3))/(x-9)## as x approaches 0?

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  Calculus

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• How would you balance Na2B4O7 + H2SO4 + H2O --> H3BO3 + Na2SO4?

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  Chemistry

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• How did the Emancipation Proclamation and Grant's appointment as general in chief affect the course of the war?

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  History

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• How do you evaluate ##sec(cos^-1(1/2))## without a calculator?

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  Geometry

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• Can you define and give an example of an observation?

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  Biology

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• How do you calculate percent composition of a mixture?

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  Chemistry

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• Why is surface tension important to life on earth?

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  Chemistry

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• How many amendments have been added to the Constitution?

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  History

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• Is BI3 a stronger Lewis acid than BCl3 and BF3?

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  Chemistry

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• How do you convert -220 degrees to radians without a calculator?

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  Geometry

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• How is nuclear fusion in a main-sequence star different from nuclear fusion in a giant star?

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  Science

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• In human anatomy, what is a crest?

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  Psychology

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• How can geographic isolation lead to speciation?

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  Biology

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• What is the area of a rectangle with length ##(2x+2)##, width ##(x)## and a diagonal of 13?

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  Geometry

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• What peaks in their mass spectra could be used to distinguish between 4-methyl-2-pentanone and 2-methyl-3-pentanone?

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  Chemistry

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• What are some examples of symbolism in the movie, "Rear Window"?

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  English

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• What are the pros and cons of first person, second person and third person limited and omniscient?

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  English

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• Who won the Battle of Tippecanoe?

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  History

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• How do you solve using gaussian elimination or gauss-jordan elimination, ##x + y + z = 0##, ##2x - y + z = 1## and ##x + y - 2z = 2##?

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  Precalculus

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• What is the factorial of 10?

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  Precalculus

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• What do ##a## and ##b## represent in the standard form of the equation for an ellipse?

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  Precalculus

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• In what parts of the heart do you find oxygenated blood and in what parts do you find deoxygenated blood?

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  Psychology

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• What is an oxbow lake and how is it produced?

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  Science

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• The area of a rectangle is ##5 4/5## square meters. The width of the rectangle is ##2 1/4## meter. How long is the rectangle?

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  Geometry

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• Why did many people doubt the Anaconda Plan?

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  History

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• Given that ##a-b=10## and that ##2 * (a+b)^2=64##, what is the value of ##a+b## ?

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  Algebra

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• How do you find the derivative of ##y=cos(x)## from first principle?

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  Calculus

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• How long do humans live in reference to the time scale of the universe?

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  Science

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• What shape is CH4O?

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  Chemistry

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• What are microtubules?

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  Biology

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• How does Columbus characterize the native people?

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  History

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