Homework Answers Page 10553

• How did Rutherford's gold foil experiment disprove the plum pudding model?

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  Chemistry

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• What is 4pi in degrees?

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  Geometry

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• How are the Pythagorean Theorem and the Distance Formula related?

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  Geometry

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• How do you prove that ##(1/2)(ln2 - ln4 + ln3) = (1/2)ln(3/2)##?

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  Precalculus

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• Among red and violet color which has higher speed?

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  Physics

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• Based on Saytzeff's rule, select the most stable alkene: 1-methylcyclohexene, 3-methylcyclohexene or 4-methylcyclohexene?

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  Chemistry

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• Why does electronegativity increase as atomic radius decreases?

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  Chemistry

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• What is the difference between primary, secondary and tertiary alcohols?

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  Chemistry

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• What is a contraction?

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  English

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• What is ##abs(-9)##?

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  Algebra

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• How do you simplify the expression using a double angle formula ##1-2sin^2(2x)##?

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  Geometry

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• How many cheese doodles are in .5 moles of cheese doodles?

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  Chemistry

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• What causes boiling point elevation and freezing point depression in solutions?

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  Chemistry

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• Which gland produces ADH?

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  Psychology

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• How would you describe the angles and sides of an acute, isosceles triangle?

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  Geometry

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• What are some examples of organisms in the phylum mollusca?

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  Biology

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• Where is the Moon in its orbit at the time of a solar eclipse?

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  Science

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• What is,dark matter made of?

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  Chemistry

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• Why is the mole an important unit to chemists?

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  Chemistry

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• How do you graph ##ln(abs(x))##?

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  Precalculus

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• How do you graph the direct variation equation ##y=5/2x##?

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  Algebra

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• A dollar bill is 15.6 cm long. If 200 dollar bills were laid end to end, how many meters long would the line be?

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  Algebra

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• What are linkage isomers? Give me an example

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  Chemistry

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• How do you derive the area formula of a rhombus?

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  Geometry

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• 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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