HS Sample Set 11, Round 8 from NSB
In green plants, energy is stored mainly in which of the following forms? W) Cellulose X) Starch Y) Glucose Z) ATP
W: W) Cellulose
X: X) Starch
Y: Y) Glucose
Z: Z) ATP
Answer: X) X) Starch
What sheet of muscle separates the thoracic and abdominopelvic cavities?
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The earliest known single-celled life forms on Earth belong to which of the following taxonomic groups? W) Fungi X) Protoctista Y) Plantae Z) Monera
W: W) Fungi
X: X) Protoctista
Y: Y) Plantae
Z: Z) Monera
Answer: Z) Z) Monera
What is the chief commercial ore of aluminum?
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A differentiable function f has domain the closed interval from –3 to 4 and range the closed interval from 5 to 12. If f′(x) > 0 for all x in the domain, what is f(–3)? W) –3 X) 4 Y) 5 Z) 12
W: W) –3
X: X) 4
Y: Y) 5
Z: Z) 12
Answer: Y) Y) 5
How many two-digit positive integers do NOT have 5 or 6 as a digit?
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Methyl-tertiary-butyl-ether (MTBE) replaced lead in gasoline due to several environmental benefits. In order to raise octane rating in current gasoline, what has subsequently replaced MTBE?
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Which of the following is the best estimate of the electricity consumption of a petascale supercomputer today? W) 8 kilowatts X) 80 kilowatts Y) 8 megawatts Z) 80 megawatts
W: W) 8 kilowatts
X: X) 80 kilowatts
Y: Y) 8 megawatts
Z: Z) 80 megawatts
Answer: Y) Y) 8 megawatts
Which of the following is an example of an ionic compound? W) Methane X) Chlorine dioxide Y) Dinitrogen trioxide Z) Calcium sulfide
W: W) Methane
X: X) Chlorine dioxide
Y: Y) Dinitrogen trioxide
Z: Z) Calcium sulfide
Answer: Z) Z) Calcium sulfide
What is the geometry of sulfur tetrafluoride?
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A proton is traveling counterclockwise in a circle in the x = 0 plane. In what direction is its magnetic field vector?
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What is the adjective for the type of materials that will create an induced magnetic field opposite to an externally applied magnetic field?
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Most long-period comets are thought to originate from what region in the solar system?
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In 1943, a volcano suddenly appeared in a corn field in the village of Parícutin and began erupting lava bombs and ash. What type of volcano was this?
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What quantity, in milliliters, of a 0.5 M solution of sulfuric acid would be required to neutralize 30 mL of a 0.1 M solution of sodium hydroxide?
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Identify all of the following three statements that are true of ideal concentration cells: 1) They obey the Nernst equation 2) At equilibrium, they have a positive redox potential 3) They have a positive standard redox potential
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Which of the following types of tissue do monocot roots possess at their center that dicot roots do not? W) Xylem X) Pith Y) Collenchyma Z) Trichomes
W: W) Xylem
X: X) Pith
Y: Y) Collenchyma
Z: Z) Trichomes
Answer: X) X) Pith
Identify all of the following three processes that are considered active transport: 1) Uptake of glucose via channels 2) Sodium-calcium exchange 3) Mucus secretion
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What type of circuits, which include types such as high-pass and low-pass filters, are composed of a resistor and a capacitor?
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An object’s position \(x\) as a function of time \(t\) is: $$x(t) = t^3 - t^2 + 3t + 5.$$ What is the object’s acceleration at time 2?
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Which of the following weather conditions and times of year is best for achieving efficient energy conversion in a solar thermal plant? W) Partly cloudy day in fall X) Rainy day in spring Y) Partly sunny day in winter Z) Overcast day in summer
W: W) Partly cloudy day in fall
X: X) Rainy day in spring
Y: Y) Partly sunny day in winter
Z: Z) Overcast day in summer
Answer: W) W) Partly cloudy day in fall
Which of the following accounts for the largest proportion of total US domestic energy production? W) Natural gas X) Petroleum Y) Coal Z) Nuclear
W: W) Natural gas
X: X) Petroleum
Y: Y) Coal
Z: Z) Nuclear
Answer: W) W) Natural gas
What is the period of the function with equation $$y = 4\sin(7x + 3) + 2\;?$$
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What is the area in the first quadrant between the graphs of $$y = 4x$$ and $$y = x^3\;?$$
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A mass on a spring oscillates at a frequency of 200 Hz, creating a low-pitch sound. Which of the following can be done to increase the frequency of the sound produced? W) Increase the mass X) Use a stiffer spring Y) Approach the mass-spring system at a high speed Z) Remove the air in the room
W: W) Increase the mass
X: X) Use a stiffer spring
Y: Y) Approach the mass-spring system at a high speed
Z: Z) Remove the air in the room
Answer: X) X) Use a stiffer spring
Identify all of the following three particles that are leptons: 1) Neutrino 2) Gluon 3) Positron
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In collies, what neurotransmitter is released by somatic motor neurons to induce muscle contraction?
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With which of the following is protein binding to a TATA box activity associated? W) DNA replication X) Transcription Y) Translation Z) Elongation
W: W) DNA replication
X: X) Transcription
Y: Y) Translation
Z: Z) Elongation
Answer: X) X) Transcription
In what quadrants does the graph of the equation $$y = 4x - 3$$ lie?
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What is the least common multiple of 14, 16, and 18?
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DOE scientists recently published a paper in which nanoscale circuitry was developed by printing a carbon-based semiconductor on a germanium surface. What allotrope of carbon are the semiconductors based on?
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What is the only baseload electrical power source in the US that is virtually carbon neutral, and supplies 20% of baseload electrical power?
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Consider the reaction of two moles of hydrogen gas and one mole of oxygen gas to generate two moles of steam. Which of the following statements is true? W) ΔH is greater than ΔU X) ΔH is less than ΔU Y) ΔH is equal to ΔU Z) ΔH is greater than ΔU at high temperatures, but less at low temperatures
W: W) ΔH is greater than ΔU
X: X) ΔH is less than ΔU
Y: Y) ΔH is equal to ΔU
Z: Z) ΔH is greater than ΔU at high temperatures, but less at low temperatures
Answer: X) X) ΔH is less than ΔU
Identify all of the following three diatomic molecules that MO theory predicts to be stable: 1) Li₂ 2) Be₂ 3) B₂
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We see the same side of the moon here on Earth all the time due to what effect? W) Lagrange point X) Gravitational lensing Y) Tidal locking Z) Asynchronous spin
W: W) Lagrange point
X: X) Gravitational lensing
Y: Y) Tidal locking
Z: Z) Asynchronous spin
Answer: Y) Y) Tidal locking
What layer of the Earth's atmosphere varies in depth with the time of day and reflects radio waves long distances? W) Photosphere X) Stratosphere Y) Troposphere Z) Ionosphere
W: W) Photosphere
X: X) Stratosphere
Y: Y) Troposphere
Z: Z) Ionosphere
Answer: Z) Z) Ionosphere
The hormone estrogen contains five stereocenters. How many stereoisomers of estrogen are possible?
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Identify all of the following three techniques that could separate enantiomers in a racemic mixture of a chiral amine: 1) Chiral chromatography 2) Crystallization with acetic acid 3) Crystallization with plus tartaric acid
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What is the second brightest star in the night sky?
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What famous lake was formed as a result of the collapse of Mount Mazama?
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What is $$6^2 - 2^6$$?
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Solve the following equation for \(x\) over the negative integers: $$x^3 + 5x^2 - 4x - 20 = 0$$
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Rickets is caused by a deficiency of what vitamin?
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Identify all of the following three molecules that are exocrine products: 1) EGF 2) Amylase 3) ADH
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An engine does 15 joules of work while exhausting 35 joules of waste heat. What is the percent efficiency of the engine?
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In classical mechanics, impulse can be calculated by finding the area under the curve on a graph of force versus what quantity?
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