HS Sample Set 9, Round 16 from NSB
Galena is a sulfide ore of what metal element?
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When do eclipses of the sun occur? W) Full moon X) Anytime Y) New moon Z) First or last quarter
W: W) Full moon
X: X) Anytime
Y: Y) New moon
Z: Z) First or last quarter
Answer: Y) Y) New moon
In which of the following organisms would one most likely find nematocysts? W) Jellyfish X) Octopus Y) Sponge Z) Sea cucumber
W: W) Jellyfish
X: X) Octopus
Y: Y) Sponge
Z: Z) Sea cucumber
Answer: W) W) Jellyfish
Identify all of the following four embryonic brain regions that develop from the forebrain: 1) Telencephalon 2) Mesencephalon 3) Metencephalon 4) Diencephalon
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What is the integer part of the logarithm base 3 of 2015?
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Convert 291 in base 10 to base 6.
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What component is required for a gasoline combustion engine but is unnecessary for a diesel engine? W) Air filter X) Exhaust pipe Y) Piston Z) Spark plug
W: W) Air filter
X: X) Exhaust pipe
Y: Y) Piston
Z: Z) Spark plug
Answer: Z) Z) Spark plug
On average, across the United States, what energy source accounts for more than half of homes’ heating and cooling costs? W) Natural Gas X) Electricity Y) Fuel Oil Z) Liquid Petroleum Gas
W: W) Natural Gas
X: X) Electricity
Y: Y) Fuel Oil
Z: Z) Liquid Petroleum Gas
Answer: W) W) Natural Gas
Three metals, A, B, and C, have reduction potentials of their +2 cations such that A has the greatest reduction potential and C has the least. Which of the following is true? W) A reduces B²⁺ X) A reduces B Y) B²⁺ reduces C²⁺ Z) C reduces B²⁺
W: W) A reduces B²⁺
X: X) A reduces B
Y: Y) B²⁺ reduces C²⁺
Z: Z) C reduces B²⁺
Answer: Z) Z) C reduces B²⁺
A student performs combustion analysis on a compound X containing carbon, hydrogen, and oxygen to determine its molecular formula. Given the molar mass is 76, if she combusts 1 mole of X in excess oxygen and observes 2 moles of CO₂ gas and 2 moles of H₂O gas as products, what is the molecular formula?
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Photons and gluons are classified as which of the following types of particles? W) Lepton X) Hadron Y) Meson Z) Boson
W: W) Lepton
X: X) Hadron
Y: Y) Meson
Z: Z) Boson
Answer: Z) Z) Boson
Which of the following is the sole variable that must be equal among different photons in order for electromagnetic radiation to be considered coherent? W) Frequency X) Direction Y) Phase Z) Polarization
W: W) Frequency
X: X) Direction
Y: Y) Phase
Z: Z) Polarization
Answer: Y) Y) Phase
Some scholars believe that Algol was recognized as a variable star in ancient times. Other than possibly Algol, what was the first known variable star?
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What are the units used to measure helicity?
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What is the general name for enzymes that catalyze reactions that involve the transfer of a phosphate group from ATP?
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Which of the following is not a behavior generally associated with cancerous cells? W) They induce angiogenesis X) They produce telomerase Y) They cannot stop cell division Z) They cannot proliferate when not adherent to substrate
W: W) They induce angiogenesis
X: X) They produce telomerase
Y: Y) They cannot stop cell division
Z: Z) They cannot proliferate when not adherent to substrate
Answer: Z) Z) They cannot proliferate when not adherent to substrate
What type of Styrofoam device is used in school laboratories to quantitatively collect data to calculate the heat released by chemical reactions and physical changes at constant pressure?
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Which of the following is not an advantage of photovoltaic power sources? W) Low noise generation X) Low pollution Y) Low manufacturing costs Z) Low operating costs
W: W) Low noise generation
X: X) Low pollution
Y: Y) Low manufacturing costs
Z: Z) Low operating costs
Answer: Y) Y) Low manufacturing costs
If the radius of a sphere is doubled, by what percent does the volume increase?
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What is the smallest positive angle, in degree measure, between the vectors **i** + 2**j** + 3**k** and 2**i** − 3**j** − **k**?
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After ammonia is added to an unknown solution, a light blue precipitate forms. After adding more ammonia and stirring, the blue precipitate dissolves to form a royal blue solution. The initial solution most likely contains which of the following? W) Zinc X) Copper Y) Chromium Z) Manganese
W: W) Zinc
X: X) Copper
Y: Y) Chromium
Z: Z) Manganese
Answer: X) X) Copper
A complex ion has a coordination number of 4 and exhibits cis-trans isomerism. What must the geometry of this ion be?
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A train at rest has a length of 100 meters. At what speed, in terms of the speed of light \(c\), must it approach a tunnel of length 60 meters so that an observer at rest with respect to the tunnel will see that the entire train is in the tunnel at one time?
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Which of the following medical applications makes use of x-rays? W) Computed Tomography X) Magnetic Resonance Imaging Y) Positron Emission Tomography Z) Ultrasound
W: W) Computed Tomography
X: X) Magnetic Resonance Imaging
Y: Y) Positron Emission Tomography
Z: Z) Ultrasound
Answer: W) W) Computed Tomography
What is the term for the theoretical boundary separating the regions of the solar nebula where terrestrial planets and gas giants form?
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Name all the planets that exhibit a full range of phases as viewed from Earth.
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If you roll two six-sided dice, what is the probability that the product of the two numbers is prime?
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What is the tens digit in the sum \(\displaystyle \sum_{n=6}^{2015} n!\)?
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Which of the following one-to-one solutions of liquids would be expected to show the most deviation from Raoult’s Law’s prediction of vapor pressure? W) A mixture of water and ethanol X) A mixture of pentane and hexane Y) A mixture of water and cyclohexanol Z) A mixture of acetone and chloroform
W: W) A mixture of water and ethanol
X: X) A mixture of pentane and hexane
Y: Y) A mixture of water and cyclohexanol
Z: Z) A mixture of acetone and chloroform
Answer: W) W) A mixture of water and ethanol
A student prepares a solution of sodium chloride in water at 25 °C. Name all of the following three properties of the solution that would be unchanged if the solution was heated to 80 °C: 1) Molarity 2) Molality 3) Volume
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The Edinger-Westphal nucleus consists of parasympathetic neurons that control pupillary reflexes. Which of the following neurotransmitters do Edinger-Westphal neurons most likely release? W) Epinephrine X) Norepinephrine Y) Glutamine Z) Acetylcholine
W: W) Epinephrine
X: X) Norepinephrine
Y: Y) Glutamine
Z: Z) Acetylcholine
Answer: Z) Z) Acetylcholine
What phylum of gram-negative bacteria includes Rhizobia, Nitrosomonas, and *E. coli*?
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What was the primary reason that US and European markets adopted E85 as the maximum blend to be used in flexible fuel vehicles? W) Higher ethanol blends are too expensive X) Higher ethanol blends are unable to ignite in cold weather Y) Higher ethanol blends cannot be safely stored Z) Higher ethanol blends release more CO₂ into the atmosphere through deforestation than they conserve
W: W) Higher ethanol blends are too expensive
X: X) Higher ethanol blends are unable to ignite in cold weather
Y: Y) Higher ethanol blends cannot be safely stored
Z: Z) Higher ethanol blends release more CO₂ into the atmosphere through deforestation than they conserve
Answer: X) X) Higher ethanol blends are unable to ignite in cold weather
What physical quantity, derived from the Stefan–Boltzmann equation, is defined as the energy radiated by a body at a particular temperature divided by the energy radiated by a black body at the same temperature?
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If a nonzero net torque is applied from an external source onto a frictionless rotating device, which of the following statements is NOT true? W) The rotational velocity at some time \(t\) can be equal to zero after the torque begins. X) The final total rotational energy of the system can be greater than the total work done by the net torque. Y) The total momentum of the device is constant before and after the torque is applied. Z) Any gravitational potential energy gained by the device due to rotation is lost upon completion of a full revolution.
W: W) The rotational velocity at some time \(t\) can be equal to zero after the torque begins.
X: X) The final total rotational energy of the system can be greater than the total work done by the net torque.
Y: Y) The total momentum of the device is constant before and after the torque is applied.
Z: Z) Any gravitational potential energy gained by the device due to rotation is lost upon completion of a full revolution.
Answer: Y) Y) The total momentum of the device is constant before and after the torque is applied.
In beta minus decay of a neutron into a proton, electron, and an antineutrino, what massive particle is emitted by the neutron that decays into the electron and the antineutrino?
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What is the optical depth of the solid Earth at visible wavelengths? W) Zero X) Much greater than one Y) Much less than one Z) One
W: W) Zero
X: X) Much greater than one
Y: Y) Much less than one
Z: Z) One
Answer: X) X) Much greater than one
The most violent earthquake ever recorded in the United States occurred in what state?
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What cellular substructures, characterized by their dynamic instability, go through growing phases known as “rescue” and shrinking phases known as “catastrophe”?
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What law of muscle contraction states that the stroke volume of the heart increases in response to an increase in the volume of blood filling the heart?
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What is the minimum distance between the graph of \(\displaystyle y = x + 1\) and the origin?
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A box contains 10 red marbles and 5 black marbles. A marble is randomly selected from the box. If the marble is red, it is returned to the box. If the marble is black, it and 3 additional black marbles are put in the box. Then a second marble is randomly selected. What is the probability that the second marble selected is black?
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Rank the following three compounds from lowest to highest molecular mass: 1) Iron(II) phosphate; 2) Iron(III) phosphate; 3) Aluminum phosphate.
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Rank the following three compounds from lowest to highest molecular mass: 1) Iron(II) phosphate 2) Iron(III) phosphate 3) Aluminum phosphate
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Identify all of the following four charge distributions in which the electric field magnitude is equal to zero at the given point: 1) Any point above an infinite sheet of charge with uniform charge per unit area 2) Inside a cylinder, when the cylinder is infinitely conducting with a radius \(R\) and charge per unit length \(\lambda\) 3) A point which is a distance \(R\) from an infinite wire, with charge per unit length \(\lambda\) 4) A point inside a conducting sphere of radius \(R\), with charge \(q\) on the surface
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When a superconductor is exhibiting the Meissner effect, it is said to perfectly exhibit what property?
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