HS Sample Set 11, Round 9 from NSB
What leukocyte can have up to a five-lobed nucleus and plays a role in phagocytosis of bacteria?
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What type of immune cells use perforins to induce cell death in infected body cells?
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Biogas is a renewable energy source that is typically produced as landfill gas, caused by the breakdown of biodegradable waste via anaerobic microbes. What two gases are the primary constituents of biogas?
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Based on average operating conditions, rank the following household appliances in order of increasing electricity usage per unit time: 1) LCD TV; 2) Toaster oven; 3) Hair dryer; 4) Curling iron.
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If \(f\) is a continuous function such that \(\displaystyle \int_{3}^{7} f(x)\,dx = 14\), what is the average value of \(f\) on the closed interval from 3 to 7?
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How many sides does a regular polygon have if each interior angle measures 177 degrees?
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What term, combining the Greek words for blanket and rock, describes the loose, incoherent material of any origin on the surface of a planet or satellite?
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A barchan dune develops perpendicular to a moderate-velocity, uniform wind. Which of the following dunes is developed by variable wind direction? W) Star X) Longitudinal Y) Seif Z) Dome
W: W) Star
X: X) Longitudinal
Y: Y) Seif
Z: Z) Dome
Answer: W) W) Star
What is the largest resonant wavelength, in meters, for sound waves in a 1-meter tube that is closed on one end?
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The global positioning system uses corrections to account for special and general relativistic effects. Which of the following is closest to the daily positional deviation that would result if these corrections were not accounted for? W) 1 centimeter X) 1 meter Y) 100 meters Z) 10 kilometers
W: W) 1 centimeter
X: X) 1 meter
Y: Y) 100 meters
Z: Z) 10 kilometers
Answer: Z) Z) 10 kilometers
Which of the following is the correct definition of molality? W) Kilograms of solute per liter of solvent X) Moles of solute per liter of solution Y) Moles of solute per liter of solvent Z) Moles of solute per kilogram of solvent
W: W) Kilograms of solute per liter of solvent
X: X) Moles of solute per liter of solution
Y: Y) Moles of solute per liter of solvent
Z: Z) Moles of solute per kilogram of solvent
Answer: Z) Z) Moles of solute per kilogram of solvent
Plants grown with deuterated water grow more slowly than those grown with non-deuterated water. This is thought to be an illustration of which of the following effects? W) Quantum Hall effect X) Magnetic isotope effect Y) Steric isotope effect Z) Kinetic isotope effect
W: W) Quantum Hall effect
X: X) Magnetic isotope effect
Y: Y) Steric isotope effect
Z: Z) Kinetic isotope effect
Answer: Z) Z) Kinetic isotope effect
The National Renewable Energy Laboratory has recently demonstrated that wind turbines can now increase the stability of a power system by employing what modulating technology?
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A major component of gasification-based syngas is carbon monoxide. What is the other major fuel component?
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After the first 4 billion years of Earth’s history, what relatively short evolutionary event brought forth most major animal phyla, as evidenced in the fossil record?
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Land that has been frozen for at least two years, including rock or soil, has what classification?
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Which of the following correctly describes a magnifying glass? W) Single convex lens X) Two convex lenses Y) Single concave lens Z) Two concave lenses
W: W) Single convex lens
X: X) Two convex lenses
Y: Y) Single concave lens
Z: Z) Two concave lenses
Answer: W) W) Single convex lens
A bicyclist goes over the top of a hill with a radius of 50 meters. Which of the following is closest to the maximum speed, in meters per second, the cyclist can have without leaving the ground at the top of the hill? W) 11 X) 22 Y) 33 Z) 44
W: W) 11
X: X) 22
Y: Y) 33
Z: Z) 44
Answer: X) X) 22
A triangle has two sides of lengths 38 and 54. What is the largest possible integer length of the third side?
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When applying the Euclidean algorithm to find the greatest common divisor of 42 and 157, what is the remainder after the third step?
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Sutures are an example of what type of joint? W) Synovial X) Saddle Y) Disk Z) Immovable
W: W) Synovial
X: X) Saddle
Y: Y) Disk
Z: Z) Immovable
Answer: Z) Z) Immovable
Hansen’s disease is caused by which of the following genera of bacteria? W) Streptococcus X) Helicobacter Y) Mycobacterium Z) Vibrio
W: W) Streptococcus
X: X) Helicobacter
Y: Y) Mycobacterium
Z: Z) Vibrio
Answer: Y) Y) Mycobacterium
A student obtained a low value when he attempted to measure the number of waters of hydration in a sample of calcium sulfate. Which of the following mistakes could lead to the erroneous result? W) The sample was not heated enough X) The sample was heated too much Y) A balance that gave uniformly high readings was used Z) A balance that gave uniformly low readings was used
W: W) The sample was not heated enough
X: X) The sample was heated too much
Y: Y) A balance that gave uniformly high readings was used
Z: Z) A balance that gave uniformly low readings was used
Answer: W) W) The sample was not heated enough
Which of the following elements possesses the largest first ionization energy? W) Fluorine X) Neon Y) Calcium Z) Argon
W: W) Fluorine
X: X) Neon
Y: Y) Calcium
Z: Z) Argon
Answer: X) X) Neon
Which of the following are proper units for entropy? W) Joules X) Kelvins per joule Y) Joules per kelvin Z) Joule-kelvins
W: W) Joules
X: X) Kelvins per joule
Y: Y) Joules per kelvin
Z: Z) Joule-kelvins
Answer: Y) Y) Joules per kelvin
An observer is moving at 50 m/s towards a stationary source that is emitting a wave with velocity 100 m/s. What is the ratio of the observed frequency to the transmitted frequency before the observer passes the source?
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Which of the following electrons would be most effective at shielding the nuclear charge seen by a 3s electron in an aluminum atom? W) 1s X) 2s Y) 2p Z) 3s
W: W) 1s
X: X) 2s
Y: Y) 2p
Z: Z) 3s
Answer: W) W) 1s
If an organo-magnesium compound is reacted with formaldehyde, which of the following will be formed? W) Ketone X) Imine Y) Secondary alcohol Z) Primary alcohol
W: W) Ketone
X: X) Imine
Y: Y) Secondary alcohol
Z: Z) Primary alcohol
Answer: Z) Z) Primary alcohol
Which of the following organelles would likely contain a high concentration of catalase? W) Glyoxysome X) Mitochondrion Y) Peroxisome Z) Chloroplast
W: W) Glyoxysome
X: X) Mitochondrion
Y: Y) Peroxisome
Z: Z) Chloroplast
Answer: Y) Y) Peroxisome
Which of the following best describes the relationship between glucose and fructose? W) Diastereomers X) Epimers Y) Stereoisomers Z) Structural isomers
W: W) Diastereomers
X: X) Epimers
Y: Y) Stereoisomers
Z: Z) Structural isomers
Answer: Z) Z) Structural isomers
List the following four minerals in order of increasing metamorphic grade: 1) Staurolite; 2) Muscovite; 3) Garnet; 4) Chlorite.
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Radiometric dating of natural materials is mainly limited by what property unique to the radionuclide of interest for the specific time scale?
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What is the $-\tfrac{4}{3}$ power of $(-27)$?
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What is $\displaystyle \lim_{x \to 0} \frac{e^x - 1}{x^5}$?
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What treaty, signed by the United States, banned the usage of CFCs?
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Until the 1900s, what fossil fuel was the number one energy source in the United States?
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What area of the eye has a high concentration of cones and is so crucial for sharp vision that raptors have two?
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Identify all of the following four options that are examples of determinate growth in plants: 1) Shoots; 2) Roots; 3) Flowers; 4) Leaves.
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What type of bond, which also exists in the transition states of carbocation rearrangements, allows each boron atom to achieve an octet in the compound diborane?
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Identify all of the following three analytical techniques that could be used to detect the difference between two diastereomers: 1) X-ray crystallography; 2) NMR spectroscopy; 3) Mass spectrometry.
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What is the mechanical advantage of a 3.5-foot lever if the fulcrum is located 6 inches from one end?
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A piano string is tuned to A440. To two significant figures and in milliseconds, what is the period of vibration of this string?
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What type of supernova can leave behind a black hole?
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What is the term for the minimum distance from a planet at which a satellite can remain intact, without being torn apart by gravitational forces?
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A pyramid with 14 edges has how many vertices?
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A plane is traveling at 380 miles per hour with respect to the Earth. The Sun’s reflection off the plane illuminates a small area on the surface of the Earth. A passenger on the plane observes this illuminated spot move between two houses in 12 seconds. To the nearest tenth of a mile, how far apart are the two houses?
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