Homework Answers Page 10471

• Approximately how many marbles could fit into a hollow sphere the radius of the Earth?

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  Geometry

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• What is the difference between a Tangent line and a secant line on a curve?

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  Calculus

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• What does the zero factor property mean?

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  Precalculus

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• How does Bronsted-Lowry define acids and bases?

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  Chemistry

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• What purpose did the gulags serve in Russia?

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  History

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• What is electron affinity?

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  Physics

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• A steel wire in a piano has a length of 0.7 m and a mass of 0.0043 kg. To what tension must this wire be stretched so that the fundamental vibration with frequency of 261.6 Hz?

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  Physics

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• The tallest man ever recorded was Robert Wadlow, who was 272 cm tall. The tallest woman on record was Zeng Jinlian. Her height was 91% of Wadlow's height. How tall was Zeng Jinlian?

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  Algebra

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• There are approximately 7.5 gallons of water in 1 cubic foot. If a spherical water tank has a diameter of 24 feet, about how many gallons of water will it hold?

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  Geometry

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• What medium does sound travel through best?

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  Physics

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• Consider the reaction: K2S(aq)+Co(NO3)2(aq)→ 2KNO3(aq)+CoS(s) What volume of 0.255 M K2S solution is required to completely react with 170 mL of 0.110 M Co(NO3)2? Thank you!

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  Chemistry

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• Magnesium reacts with nitrogen to form magnesium nitride. The chemical formula for this reaction is ##Mg+N_2-> MgN_2##. What is the product, or what are the products, of this reaction?

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  Chemistry

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• How do you solve a percent change equation?

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  Algebra

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• What is the difference between a ligament, tendon, and cartilage?

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  Psychology

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• Omar bought 10 pounds of rice for $6. How many dollars did he pay per pound of rice?

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  Algebra

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• Is ##4x^2 + 28x + 49## a perfect square trinomial and how do you factor it?

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  Algebra

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• What is the average kinetic energy of the molecules in a gas at 273K?

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  Chemistry

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• Which group did Richard Nixon refer to as the silent majority?

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  History

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• Why did the Senate, led by Henry Cabot Lodge, oppose U.S. membership in the League of Nations?

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  History

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• Besides breaking down food, what else does the digestive system do?

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  Psychology

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• What is a solid formed from liquid reactants during a chemical reaction?

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  Chemistry

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• How do cytokinesis and telophase differ?

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  Biology

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• Explain why the atoms in neon gas do not join up in the same way that hydrogen atoms do?

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  Chemistry

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• Does reproductive isolation apply to humans?

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  Biology

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• How many mL is 1.06 L of water equivalent to ?

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  Algebra

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• One inch is ##1/12## of a foot. Eunice has a puppy that is ##3/4## of a foot tall. How many inches tall is her puppy?

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  Algebra

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• How many moons does Uranus have?

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  Science

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• How do you use a calculator to evaluate the expression ##log12## to four decimal places?

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  Precalculus

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• A train comes to a stop in 3 minutes. if the train had a uniform acceleration of -3.5 m/s/s what was initial velocity of the the train?

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  Physics

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• What is the formula for the radius of a semi-circle?

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  Geometry

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• What is the circumference of the sun at its equator?

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  Science

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• What are examples of non real numbers?

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  Algebra

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• What is the greatest common factor of 15, 30, and 45?

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  Algebra

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• How do you convert 12 kilograms to pounds using 1 kg = 2.2 lb?

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  Algebra

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• If the measure of each interior angle of a regular polygon is 171, what is the number of sides in the polygon?

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  Geometry

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• Do you use a semicolon or a colon to introduce a quote? Or something else?

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  English

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• What is the least common multiple of 6 and 8?

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  Algebra

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• What is the best definition of a passive verb?

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  English

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• What is a caldera? How are they formed?

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  Science

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• A triangular sail has a base length of 2.5 meters. The area of the square is 3.75 square meters. How tall is the sail?

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  Geometry

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• Where is DNA found in a cell?

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  Biology

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• How do you convert 100 mm Hg to Pa?

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  Chemistry

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• How do hydrogen bonds hold DNA together?

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  Chemistry

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• How long did it take astronauts to reach the moon?

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  Science

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• If y=6 for every value of x, can y be regarded as a function of x ? and why ?

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  Algebra

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• How do you balance H3PO4 +Mg(OH)-->Mg3(PO4)2 +H20?

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  Chemistry

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• What is a wedge?

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  Physics

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• How do you calculate molar volume of nitrogen gas?

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  Chemistry

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• How do you write ##400## in exponential notation?

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  Algebra

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• How do you find a double angle formula for sec(2x) in terms of only csc(x) and sec(x)?

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  Geometry

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