HS Sample Set 10, Round 1 from NSB
Planck was able to describe the color change of black bodies at different temperatures by introducing what concept?
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A horizontal force of 90 newtons is applied to a 20-kilogram block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.5 and the coefficient of kinetic friction of 0.2. In meters per second squared, what is the acceleration of the block?
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Which of the following energy sources is most directly derived from the sun? W) Wind X) Tidal energy Y) Geothermal Z) Nuclear
W: W) Wind
X: X) Tidal energy
Y: Y) Geothermal
Z: Z) Nuclear
Answer: W) W) Wind
Transesterification is a reaction used to generate biodiesel from what class of biomolecule?
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Given the percentages by mass of different elements in a compound, identify all of the following three characteristics of the compound that can be uniquely determined: 1) The empirical formula; 2) The molecular formula; 3) The structure
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What property of an element is defined as the amount of energy released when one mole of electrons is added to one mole of the neutral atomic element in the gaseous state?
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The webbed hand of a human embryo develops into five separate fingers by a process of programmed cell death. What is the term for this process?
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What is the probability of obtaining an F1 purple pea flower if purple is dominant, white is recessive, and a parental cross is made between a heterozygous purple and homozygous white flower? W) 1/8 X) 1/4 Y) 1/2 Z) 1
W: W) 1/8
X: X) 1/4
Y: Y) 1/2
Z: Z) 1
Answer: Y) Y) 1/2
Matrices with which of the following pairs of dimensions cannot be multiplied together? W) 3 rows, 2 columns times 2 rows, 3 columns X) 6 rows, 5 columns times 6 rows, 5 columns Y) 1 row, 2 columns times 2 rows, 2 columns Z) 1,000 rows, 2,000 columns times 2,000 rows, 4,000 columns
W: W) 3 rows, 2 columns times 2 rows, 3 columns
X: X) 6 rows, 5 columns times 6 rows, 5 columns
Y: Y) 1 row, 2 columns times 2 rows, 2 columns
Z: Z) 1,000 rows, 2,000 columns times 2,000 rows, 4,000 columns
Answer: X) X) 6 rows, 5 columns times 6 rows, 5 columns
Evaluate the following expression: (–cos 360° + sin 270°) × (cos 0° + sin 0°)².
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What layer of the Earth’s atmosphere contains approximately 75% of its air mass? W) Troposphere X) Mesosphere Y) Stratosphere Z) Thermosphere
W: W) Troposphere
X: X) Mesosphere
Y: Y) Stratosphere
Z: Z) Thermosphere
Answer: W) W) Troposphere
Identify all of the following three statements that are true of seismic waves: 1) P waves are compressional; 2) S waves travel through fluids; 3) P waves travel faster than S waves.
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Uranium pellets that are sealed into fuel rods are composed of what specific uranium compound?
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What technology provides the vast majority of the worldwide grid energy storage capacity? W) Liquid or compressed air X) Lead-acid, nickel-cadmium and sodium-sulfur batteries Y) Hydroelectric pump storage Z) Superconducting magnetic energy storage
W: W) Liquid or compressed air
X: X) Lead-acid, nickel-cadmium and sodium-sulfur batteries
Y: Y) Hydroelectric pump storage
Z: Z) Superconducting magnetic energy storage
Answer: Y) Y) Hydroelectric pump storage
Which of the following best describes how oxygen is stored in the muscles? W) Spread throughout X) Bound to hemoglobin Y) Bound to calmodulin Z) Bound to myoglobin
W: W) Spread throughout
X: X) Bound to hemoglobin
Y: Y) Bound to calmodulin
Z: Z) Bound to myoglobin
Answer: Z) Z) Bound to myoglobin
Which of the following examples is NOT evidence for evolution from a common ancestor? W) All living things have basic cell processes that are similar and use similar molecules X) Hox genes, or homeotic genes, control vertebrate body plans and are homologous in all vertebrates Y) Even though snakes don't have legs, some snake embryos have limb buds during development similar to other reptile embryos Z) Bats and birds both have wings that are adaptations for flying
W: W) All living things have basic cell processes that are similar and use similar molecules
X: X) Hox genes, or homeotic genes, control vertebrate body plans and are homologous in all vertebrates
Y: Y) Even though snakes don't have legs, some snake embryos have limb buds during development similar to other reptile embryos
Z: Z) Bats and birds both have wings that are adaptations for flying
Answer: Z) Z) Bats and birds both have wings that are adaptations for flying
Which of the following is NOT true of laser light? W) It is highly coherent X) It is highly dispersive Y) It is highly monochromatic Z) It is highly directional
W: W) It is highly coherent
X: X) It is highly dispersive
Y: Y) It is highly monochromatic
Z: Z) It is highly directional
Answer: X) X) It is highly dispersive
What type of image is produced by a concave spherical mirror when an object is placed outside its focal point? W) Real and upright X) Real and inverted Y) Virtual and upright Z) Virtual and inverted
W: W) Real and upright
X: X) Real and inverted
Y: Y) Virtual and upright
Z: Z) Virtual and inverted
Answer: X) X) Real and inverted
A molecule with the molecular formula C₅H₁₂ cannot form which of the following structural orientations? W) Straight-chain alkane X) Branched alkane Y) Cycloalkane Z) Normal alkane
W: W) Straight-chain alkane
X: X) Branched alkane
Y: Y) Cycloalkane
Z: Z) Normal alkane
Answer: Y) Y) Cycloalkane
In the balanced equation for the combustion of octane, what are the coefficients for carbon dioxide and water respectively?
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There are 8 siblings in a family, and when ranked from youngest to oldest, all differ from the next oldest in age by the same number of years. If the youngest is 8 and the oldest is 29, what is the common difference in their ages?
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Following are four pairs of intersecting lines that are related to circles. For three of them, the measures of the angles formed can always be found by taking half of the difference of the angle measures of the intercepted arcs. For which does this calculation generally fail? W) Two tangents X) Two secants that intersect outside the circle Y) A tangent and a secant that intersect outside the circle Z) The lines containing two intersecting chords
W: W) Two tangents
X: X) Two secants that intersect outside the circle
Y: Y) A tangent and a secant that intersect outside the circle
Z: Z) The lines containing two intersecting chords
Answer: Z) Z) The lines containing two intersecting chords
What is the boundary that traps moisture and the associated weather in the troposphere? W) Mesosphere X) Mesoboundary Y) Tropopause Z) Stratopause
W: W) Mesosphere
X: X) Mesoboundary
Y: Y) Tropopause
Z: Z) Stratopause
Answer: Y) Y) Tropopause
What state of matter is the most common in the universe?
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As the average temperature dropped during the last glacial period, a species of cave bears evolved a layer of thicker fur. What kind of selection is this an example of? W) Speciation X) Disruptive selection Y) Stabilizing selection Z) Directional selection
W: W) Speciation
X: X) Disruptive selection
Y: Y) Stabilizing selection
Z: Z) Directional selection
Answer: Z) Z) Directional selection
What substance composes the frustule of a diatom? W) Silica X) Cellulose Y) Keratin Z) Calcium carbonate
W: W) Silica
X: X) Cellulose
Y: Y) Keratin
Z: Z) Calcium carbonate
Answer: W) W) Silica
Which of the following is the most common usage of syngas? W) Electricity production X) Transportation Y) Water heating Z) Production of ethanol
W: W) Electricity production
X: X) Transportation
Y: Y) Water heating
Z: Z) Production of ethanol
Answer: W) W) Electricity production
What is the most commonly used process for desulfurizing gas?
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A helicopter uses a main rotor as propulsion and control, but requires a tail rotor to counteract torque. The balance of forces resulting from this configuration is represented best by which of Newton’s laws?
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Measured in radians per second, what is the resonant angular frequency of a circuit consisting of a 2 millifarad capacitor and an 8 millihenry inductor?
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The Jurassic period occurred during which era? W) Cenozoic X) Mesozoic Y) Paleozoic Z) Neoproterozoic
W: W) Cenozoic
X: X) Mesozoic
Y: Y) Paleozoic
Z: Z) Neoproterozoic
Answer: X) X) Mesozoic
Christmas Pie is a small hamlet in Surrey, England, at 51.25° north latitude. In degrees to the nearest integer, what is the noon sun angle over Christmas Pie on the winter solstice?
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What principle of chemical equilibrium states that if a chemical system at equilibrium experiences a change in concentration, temperature, or pressure, the equilibrium will shift in order to counteract that change?
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Consider both the hydrogenation and the bromination of alkenes using elemental bromine. Which of the following statements concerning these reactions is TRUE? W) Both reactions are syn-additions X) Hydrogenation is a syn-addition, but bromination is an anti-addition Y) Hydrogenation is an anti-addition, but bromination is a syn-addition Z) Both reactions are anti-additions
W: W) Both reactions are syn-additions
X: X) Hydrogenation is a syn-addition, but bromination is an anti-addition
Y: Y) Hydrogenation is an anti-addition, but bromination is a syn-addition
Z: Z) Both reactions are anti-additions
Answer: X) X) Hydrogenation is a syn-addition, but bromination is an anti-addition
What are the critical numbers for the function \(y = 3t^3 - t\)?
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Each day, Adam eats 20% of the cookies left in a jar. At the end of the 2nd day, there are 32 cookies left in the jar. How many cookies were in the jar originally? W) 40 X) 48 Y) 50 Z) 60
W: W) 40
X: X) 48
Y: Y) 50
Z: Z) 60
Answer: Y) Y) 50
One confirmed transformation of ununoctium-294 is the decay into livermorium-290. What type of decay process is this?
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Which of the following IR spectrum wavenumber ranges are characteristic of alcohols, terminal alkynes, and amines? W) 3700–3200 X) 3200–2700 Y) 2300–2100 Z) 1750–1650
W: W) 3700–3200
X: X) 3200–2700
Y: Y) 2300–2100
Z: Z) 1750–1650
Answer: W) W) 3700–3200
Which of the following isotopes is fissile? W) Thorium-232 X) Uranium-233 Y) Uranium-238 Z) Plutonium-238
W: W) Thorium-232
X: X) Uranium-233
Y: Y) Uranium-238
Z: Z) Plutonium-238
Answer: X) X) Uranium-233
Two resistors in parallel have an equivalent resistance of 6 Ω. One of the resistors has a resistance of 8 Ω. What is the resistance, in ohms, of the second resistor?
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Hydraulic fracturing is used to obtain which of the following resources? W) Coal X) Natural gas Y) Uranium ore Z) Water
W: W) Coal
X: X) Natural gas
Y: Y) Uranium ore
Z: Z) Water
Answer: X) X) Natural gas
Every silicate mineral contains what two elements?
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Which of the following is NOT true about plant physiology? W) Meristematic tissue located at the tips of stems and roots forms the apical meristems X) Some plants, like shrubs, have lateral meristems Y) Vascular and cork cambium are produced by apical meristems Z) Intercalary meristems allow grass to grow even after it has been mowed
W: W) Meristematic tissue located at the tips of stems and roots forms the apical meristems
X: X) Some plants, like shrubs, have lateral meristems
Y: Y) Vascular and cork cambium are produced by apical meristems
Z: Z) Intercalary meristems allow grass to grow even after it has been mowed
Answer: Y) Y) Vascular and cork cambium are produced by apical meristems
The high sugar content of honey gives it the ability to suppress growth of nearly all microbes via what kind of pressure on potentially colonizing cells?
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How many lines of symmetry does a square have?
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What are the coordinates of the vertex of the graph of \(y = -2x^2 - 8x + 7\)?
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