HS Sample Set 15, Round 6 from NSB
What is $115^2$?
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On a calculus pop quiz, 15% of the students scored 6 points, 40% scored 7 points, 35% scored 8 points, and the rest scored 9 points. What is the average score, rounded to the nearest tenth, on the quiz?
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What gas law exclusively states that, at constant volume, the pressure of an ideal gas is directly proportional to its absolute temperature?
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A certain hydrocarbon has the chemical formula C$_5$H$_{10}$. Identify all of the following three classes of molecules that it could be: 1) Alkene 2) Cyclo-alkane 3) Cyclo-alkene
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Princeton Plasma Physics Lab scientists are studying the rotational profile in the convective zone of the Sun. This rotational gradient contrasts with the uniformly-rotating zone underneath, which is dominated by what type of heat transfer?
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Researchers from Georgia State University used a supercomputer at Oak Ridge National Lab to develop an integrative model of the transcription preinitiation complex. What is the most common eukaryotic promoter DNA element over which the preinitiation complex forms?
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A circuit is connected to an eight-volt battery which puts out a current of four amperes. In ohms, what is the overall resistance of this circuit?
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A car tire with a diameter of 0.2 meters is rotating at 15 revolutions per second. To the nearest meter per second, what is the tangential speed of a point on the edge of the tire?
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Which of the following stellar spectral types is the coolest? W) K X) F Y) A Z) B
W: W) K
X: X) F
Y: Y) A
Z: Z) B
Answer: W) W) K
Although the Bayer designation alpha usually denotes the brightest star in a constellation, in which of the following constellations is the beta star usually brighter than the alpha star? W) Orion X) Canis Major Y) Lyra Z) Taurus
W: W) Orion
X: X) Canis Major
Y: Y) Lyra
Z: Z) Taurus
Answer: W) W) Orion
What structure in plants causes them to be turgid, rather than to lyse when immersed in a hypotonic solution?
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Which of the following ecosystems typically has the lowest net primary productivity per unit area? W) Estuary X) Boreal forest Y) Wetlands Z) Tundra
W: W) Estuary
X: X) Boreal forest
Y: Y) Wetlands
Z: Z) Tundra
Answer: Z) Z) Tundra
In two minutes, you complete one lap around a circular running track with radius 70 meters. In meters per second, what was the magnitude of your average velocity for the lap?
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A section of a circuit consists of a three micro-farad capacitor followed in series by a parallel combination of two capacitors of two and four micro-farads, respectively. What is the equivalent capacitance, in micro-farads, for these three capacitors?
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Which of the following is an example of a foliated metamorphic rock? W) Marble X) Quartzite Y) Hornfels Z) Phyllite
W: W) Marble
X: X) Quartzite
Y: Y) Hornfels
Z: Z) Phyllite
Answer: Z) Z) Phyllite
Foehn winds, such as the Chinook in the Great Plains, are a consequence of what orographic feature?
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The Department of Energy is supporting research on identifying new drugs to treat strep throat, which is a disease caused by what genus of bacteria?
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Researchers using Los Alamos National Lab facilities have found higher-than-expected nucleosynthesis yields for nuclei with masses between 60 and 90 atomic mass units. Which of the following elements do they predict having higher yields? W) Scandium X) Arsenic Y) Molybdenum Z) Tin
W: W) Scandium
X: X) Arsenic
Y: Y) Molybdenum
Z: Z) Tin
Answer: X) X) Arsenic
What unit was traditionally defined as the amount of heat required to raise the temperature of one gram of water by one degree Celsius?
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Which of the following sulfate salts is the most soluble in water? W) Strontium sulfate X) Zinc sulfate Y) Lead(II) sulfate Z) Mercury(I) sulfate
W: W) Strontium sulfate
X: X) Zinc sulfate
Y: Y) Lead(II) sulfate
Z: Z) Mercury(I) sulfate
Answer: X) X) Zinc sulfate
What specialized plant microbodies convert fats into carbohydrates?
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What type of cellular junction typically involves intermediate filaments in a cell’s cytoskeleton that are attached to neighboring cells via cadherin proteins?
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What is the determinant of the 2-by-2 matrix with first row –4, –5 and second row –8, 2?
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The terminal side of an angle in standard position passes through the point (–5, –12). Find the sine and tangent, respectively, of the angle.
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Volcanos on Venus are predominantly what type?
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What is the term for a region of interstellar atomic hydrogen that is ionized due to energy from a nearby hot star?
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Transpiration in plants primarily results from the loss of water from what epidermal structures?
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Identify all of the following three structures that are lymphoid organs: 1) Spleen 2) Thymus 3) Tonsil
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Hans Oersted demonstrated that an electric current is capable of deflecting a compass needle. This is because the current produces what type of field?
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Which of the following uniform solids will accelerate most quickly as it rolls down a ramp of fixed incline? W) Hollow cylinder X) Solid cylinder Y) Hollow sphere Z) Solid sphere
W: W) Hollow cylinder
X: X) Solid cylinder
Y: Y) Hollow sphere
Z: Z) Solid sphere
Answer: Z) Z) Solid sphere
Which of the following molecules has a carboxyl group? W) Butyrate X) 2-cyanohexane Y) Toluene Z) Nitro-phenol
W: W) Butyrate
X: X) 2-cyanohexane
Y: Y) Toluene
Z: Z) Nitro-phenol
Answer: W) W) Butyrate
What is the systematic IUPAC name for toluene?
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An arithmetic sequence has fourth term 15 and eighth term 39. What is the positive difference between consecutive terms for the sequence?
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What are the radius and the coordinates of the center, respectively, of the circle with equation $$x^2 - 8x + y^2 + 18y + 66 = 0$$?
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Scientists at SLAC National Accelerator Lab are studying the infection mechanisms of the virus that causes chickenpox and shingles. What is the species of this virus?
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Researchers at SLAC National Accelerator Lab are studying what happens when a material is suddenly demagnetized. If a metallic wire were wrapped around the material being demagnetized, what would occur in the wire? W) Any current would be strongly suppressed X) Alternating current would be rectified to direct current Y) The wire would show increased resistance Z) A direct current would be induced in the wire
W: W) Any current would be strongly suppressed
X: X) Alternating current would be rectified to direct current
Y: Y) The wire would show increased resistance
Z: Z) A direct current would be induced in the wire
Answer: Z) Z) A direct current would be induced in the wire
The boundary between the Pacific plate and the Nazca plate is best characterized as what general type of plate boundary?
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Identify all of the following three ocean basins that are actively undergoing seafloor spreading: 1) Atlantic 2) Pacific 3) Indian
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Which of the following factors, if increased, would increase the period of oscillation of a simple pendulum? W) Amplitude of oscillation X) Mass of the pendulum Y) Length of the pendulum Z) Gravitational force
W: W) Amplitude of oscillation
X: X) Mass of the pendulum
Y: Y) Length of the pendulum
Z: Z) Gravitational force
Answer: Y) Y) Length of the pendulum
A particle undergoes a net force $F(t) = 3t^2$, where $t$ represents time. In SI base units, what is the change in momentum this particle undergoes from $t = 0$ to $t = 2$?
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In degrees, what is the bond angle between the two chlorides in the iodine dichloride anion?
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Identify all of the following three compounds that are molecular solids: 1) Silicon carbide 2) 2,2-di-methyl-do-de-cane 3) Ammonium polyphosphate
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If a universal set contains 42 elements, how many elements are in the complement of a set with 19 elements?
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What is the smallest positive integer that is congruent to 4 mod 5, and congruent to 6 mod 7?
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During what phase of meiosis do sister chromatids separate?
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In prokaryotic DNA replication, what proteins are responsible for stabilizing the separated strands and preventing them from annealing?
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