HS Sample Set 12, Round 3 from NSB
Two years after carbon dioxide was sequestered by the Pacific Northwest National Lab near Wallula, Washington, the material was converted into mineral substances resembling what type of sedimentary rock? W) Rock gypsum X) Limestone Y) Coal Z) Rock salt
W: W) Rock gypsum
X: X) Limestone
Y: Y) Coal
Z: Z) Rock salt
Answer: X) X) Limestone
Identify all of the following three statements that are true regarding nuclear energy in the United States: 1) Most common reactors are thermal reactors; 2) Most common reactors use U-235 as a fuel; 3) Water can be used as a moderator.
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What star has the lowest apparent magnitude as observed from Earth?
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What type of star must be present prior to a Type One‐A supernova?
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Before amino acids can be used in translation, the free amino acid must be bonded to what class of molecules?
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Certain plants have leaves in which bundle‐sheath cells are tightly packed around veins, which are then surrounded by mesophyll cells. This anatomy is associated with plants that perform what type of photosynthesis?
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Which of the following terms best describes the relationship between 1‐butanol and 4‐butanol? W) Structural isomers X) Same compound Y) Diastereomers Z) Enantiomers
W: W) Structural isomers
X: X) Same compound
Y: Y) Diastereomers
Z: Z) Enantiomers
Answer: X) X) Same compound
Identify all of the following three statements that are true of xenon tetrafluoride: 1) It is tetrahedral; 2) It has no net dipole moment; 3) It contains two unpaired electrons.
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A 1,000-kilogram block of density 800 kg/m³ is placed in a fluid of density 1,000 kg/m³. What percentage of the block’s total volume floats above the surface of the fluid?
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A lightning bolt strikes a power station, transmitting a current of 30,000 amps for 100 microseconds into it, which is currently charging a 2,000 milliampere-hour battery. Assuming perfect transmission, which percentage of the battery would it charge? W) Less than 1 X) 25 Y) 50 Z) 75
W: W) Less than 1
X: X) 25
Y: Y) 50
Z: Z) 75
Answer: W) W) Less than 1
What value of $x$ minimizes the function $f(x)=x^2-6x+2$?
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If $f(x)=\sqrt{x+4}$ and $g(x)=\sqrt{x-4}$, what is the domain of the function $f(x)/g(x)$? W) All real numbers greater than 4 X) All real numbers greater than or equal to 4 Y) All real numbers greater than or equal to –4 Z) All real numbers between –4 and 4
W: W) All real numbers greater than 4
X: X) All real numbers greater than or equal to 4
Y: Y) All real numbers greater than or equal to –4
Z: Z) All real numbers between –4 and 4
Answer: W) W) All real numbers greater than 4
Under limited nutrient conditions *Bacillus subtilis* initiates a morphological change, notably documented by Robert Koch, that results in the formation of what structure?
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What is the term for phages that can reproduce using both the lytic and lysogenic cycle?
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Which of the following acids is triprotic? W) Sulfuric acid X) Hydrocyanic acid Y) Pyruvic acid Z) Arsenic acid
W: W) Sulfuric acid
X: X) Hydrocyanic acid
Y: Y) Pyruvic acid
Z: Z) Arsenic acid
Answer: Z) Z) Arsenic acid
Rank the following three liquids in increasing order of solubility in water at STP: 1) Hexane; 2) Ethanol; 3) Ethyl acetate.
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The grand unified theory joins together all of the fundamental forces except which one?
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Bill pulls a sled with 10 N of force using a rope angled 60° above horizontal. How much work in joules does he perform if he pulls it 3 m?
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To what geologic era would you travel if you wanted to observe living dinosaurs?
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In a cooling magma chamber, which mineral will crystallize first? W) Quartz X) Feldspar Y) Amphibole Z) Olivine
W: W) Quartz
X: X) Feldspar
Y: Y) Amphibole
Z: Z) Olivine
Answer: Z) Z) Olivine
What is $27^{\tfrac{4}{3}}$?
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One endpoint of a diameter of a sphere centered at $(3,4,-7)$ is $(5,-6,2)$. What are the coordinates of the other endpoint?
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SLAC researchers developed a new, cheap catalyst for the oxygen‐evolving reaction relevant to fuel production. On what molecule do these catalysts act to evolve oxygen?
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Identify all of the following three types of waves that can be modeled using the Community Atmosphere Model: 1) Tsunamis; 2) Tidal bores; 3) Wind wave.
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When performing bomb calorimetry, which physical quantity is held constant? W) Pressure X) Volume Y) Temperature Z) Entropy
W: W) Pressure
X: X) Volume
Y: Y) Temperature
Z: Z) Entropy
Answer: X) X) Volume
Rank the following three molecules in terms of increasing dipole moment: 1) O-dihydroxybenzene; 2) M-dihydroxybenzene; 3) P-dihydroxybenzene.
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Which of the following is true about the function $f(x)=\cos x$? W) It is neither even nor odd X) It has the horizontal asymptote $y=1$ Y) It has period $2\pi$ Z) It is not differentiable at $x=0$
W: W) It is neither even nor odd
X: X) It has the horizontal asymptote $y=1$
Y: Y) It has period $2\pi$
Z: Z) It is not differentiable at $x=0$
Answer: Y) Y) It has period $2\pi$
Simplify the following expression involving the complex number $i$: $$4i + 3i^2 + 2i^3 + i^4$$
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SLAC scientists developed a technique for probing the electronic structure of solids via high harmonic generation (HHG). In this technique, light is produced via the oscillations of what subatomic particle?
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ReACT protein‐labeling technology improved upon previous bioconjugation methods that labeled sulfur atoms but disrupted protein function. Previous techniques labeled what amino acid?
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What form of magnetism is demonstrated when a material’s magnetic moment opposes the direction of an externally applied magnetic field?
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If a radioactive element’s half‐life is 60 days, then to the nearest whole number, how many grams of a 1-kg sample remain after 300 days?
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Which of the following terms describes the set of planets that exhibit a full range of phases as observed from Earth? W) Terrestrial X) Jovian Y) Inferior Z) Superior
W: W) Terrestrial
X: X) Jovian
Y: Y) Inferior
Z: Z) Superior
Answer: Y) Y) Inferior
Main‐sequence stars larger than our Sun fuse hydrogen into helium via what cycle that uses carbon as a catalyst?
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Identify all of the following three Linnaean classifications that apply to the leopard: 1) Carnivora; 2) Chordata; 3) Canidae.
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Identify all of the following three organisms that are part of the phylum Coniferophyta: 1) Sequoia; 2) Orchid; 3) Douglas fir.
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A pair of ten‐sided dice, each numbered 1 through 10, is rolled. What is the most probable sum of the two numbers rolled?
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What is $8^{\log_2 5}$?
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In the citric acid cycle, how many molecules of NADH are generated from the conversion of citrate to isocitrate?
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What plant hormone, synthesized by almost all known plants, is responsible for stomatal closure during dry stress?
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The function describing an object’s position is transformed into a function describing velocity by what operation from calculus?
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Two 6‐kg masses are connected by a spring with force constant 300 N/m. If the spring is compressed by 5 cm, what is the initial acceleration, in m/s², of one mass?
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Identify all of the following three chemicals whose addition will increase the percent ionization of acetic acid in a solution: 1) Water; 2) Concentrated acetic acid; 3) Concentrated hydrochloric acid.
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Identify all of the following three reactions that would favor reactants over products: 1) Keq = 3; 2) ΔG > 0; 3) Endothermic reaction with ΔS < 0.
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What type of well has water coming out of the ground freely because the pressure surface is above ground level?
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What type of unconformity occurs when layers of rock are deposited on an erosional surface of horizontal, undeformed rock?
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