HS Sample Set 2, Round 3 from NSB
Solve the following equation for x: $$2[x - (3x + 1)] = 4 - 2x$$
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How many zeroes are at the end of 25!?
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What geomorphic province is best described as an area consisting of separate broad mountain ranges separated by broad valleys?
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A new study has found that white spruce trees on the edge of the tundra in Alaska’s far north have thrived in the past 100 years. Which of the following methodologies was most likely used to determine the age of the trees? W) Sclerochronology X) Dendrochronology Y) Radiometric dating Z) Acanthochronology
W: W) Sclerochronology
X: X) Dendrochronology
Y: Y) Radiometric dating
Z: Z) Acanthochronology
Answer: X) X) Dendrochronology
Which of the following is NOT an effect of epinephrine? W) Decreased blood pressure X) Increased breathing rate Y) Decreased digestion Z) Glycogenolysis
W: W) Decreased blood pressure
X: X) Increased breathing rate
Y: Y) Decreased digestion
Z: Z) Glycogenolysis
Answer: W) W) Decreased blood pressure
During a plankton tow, you catch many fish larvae. Which of the following categories best characterizes your organisms? W) Holoplankton X) Ichthyoplankton Y) Larvaceans Z) Mysids
W: W) Holoplankton
X: X) Ichthyoplankton
Y: Y) Larvaceans
Z: Z) Mysids
Answer: X) X) Ichthyoplankton
If the amplitude of a simple harmonic oscillator is decreased to 50% of its initial value, compute the ratio of its final energy to its initial energy.
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Three capacitors with capacitances of 2 μF, 2.5 μF, and 10 μF are connected in series. Find the combined capacitance in microfarads.
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Which of the following is considered a zero marginal cost generator? W) Nuclear X) Wind Y) Biomass Z) Geothermal
W: W) Nuclear
X: X) Wind
Y: Y) Biomass
Z: Z) Geothermal
Answer: X) X) Wind
How much power in watts is consumed by a motor running at 440 volts and drawing 6.6 amperes?
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What is the molecular geometry of sulfur tetrafluoride?
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A total of 50.0 mL of 0.100 M sulfuric acid are used to titrate 10.0 mL of sodium hydroxide to its endpoint. What is the molarity of the sodium hydroxide? W) 0.025 X) 0.100 Y) 0.50 Z) 1.00
W: W) 0.025
X: X) 0.100
Y: Y) 0.50
Z: Z) 1.00
Answer: Z) Z) 1.00
What is the ratio of the area of a square that circumscribes a circle to the area of a square inscribed in the same circle?
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Find the coordinates of the center and the radius of the circle: x² + y² – 8x + 6y – 11 = 0
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Which of the following is the term for the depositional feature created as streams deposit sediments beneath a glacier? W) Tarn X) Esker Y) Kame Z) Arete
W: W) Tarn
X: X) Esker
Y: Y) Kame
Z: Z) Arete
Answer: X) X) Esker
Based on Bowen’s reaction series, which feldspar forms last as a magma cools?
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Which of the following recent fossil discoveries helped evolutionary biologists understand how tetrapods could have evolved from fishes? W) Tiktaalik roseae X) Australopithecus sediba Y) Titanoboa Z) Acherontisuchus guajiraenisis
W: W) Tiktaalik roseae
X: X) Australopithecus sediba
Y: Y) Titanoboa
Z: Z) Acherontisuchus guajiraenisis
Answer: W) W) Tiktaalik roseae
Which of the following mechanisms would best explain how bisphenol A causes above average production of yellow agouti mice? W) Decreased methylation of the agouti gene X) Increased methylation of the agouti gene Y) Decreased phosphorylation of the agouti gene Z) Increased phosphorylation of the agouti gene
W: W) Decreased methylation of the agouti gene
X: X) Increased methylation of the agouti gene
Y: Y) Decreased phosphorylation of the agouti gene
Z: Z) Increased phosphorylation of the agouti gene
Answer: W) W) Decreased methylation of the agouti gene
When a piano tuner uses a tuning fork to tune the piano, she knows a string is in tune when the beat frequency has which of the following values in hertz? W) 0 X) 2 Y) 10 Z) 33
W: W) 0
X: X) 2
Y: Y) 10
Z: Z) 33
Answer: W) W) 0
An electron is accelerated through a potential difference of 5.0 kV. Which of the following is the kinetic energy in joules gained in the process? W) 8.0 × 10²² X) 8.0 × 10⁻¹⁶ Y) 1.6 × 10⁻¹⁶ Z) 1.6 × 10⁻²²
W: W) 8.0 × 10²²
X: X) 8.0 × 10⁻¹⁶
Y: Y) 1.6 × 10⁻¹⁶
Z: Z) 1.6 × 10⁻²²
Answer: X) X) 8.0 × 10⁻¹⁶
Which of the following solid compounds would NOT be soluble to a large extent in water, but would be soluble in hydrochloric acid? W) Ba(NO₃)₂ X) CuSO₄ Y) MgCO₃ Z) KClO₄
W: W) Ba(NO₃)₂
X: X) CuSO₄
Y: Y) MgCO₃
Z: Z) KClO₄
Answer: Y) Y) MgCO₃
Assuming complete dissociation and the absence of ion pairing, which of the following 1.00 M aqueous solutions would have the lowest freezing point? W) Sucrose X) Sodium chloride Y) Calcium hydroxide Z) Potassium phosphate
W: W) Sucrose
X: X) Sodium chloride
Y: Y) Calcium hydroxide
Z: Z) Potassium phosphate
Answer: Z) Z) Potassium phosphate
Which of the following species can be considered partially endothermic? W) Salmon X) Trout Y) Tuna Z) Flounder
W: W) Salmon
X: X) Trout
Y: Y) Tuna
Z: Z) Flounder
Answer: Y) Y) Tuna
During DNA replication, what would be the complement of the template strand: 5’-TAT CAG CCC-3’, including strand polarity in your answer.
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State the quadrant in which $$\theta$$ lies if cot $$\theta < 0$$ and sec $$\theta > 0$$.
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Express the following quotient of complex numbers in simplest a + bi form: (4 + 3i)/(5 – 2i).
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Which of the following types of sand is commonly associated with beach areas close to tropical reef environments? W) White X) Quartz Y) Black Z) Green
W: W) White
X: X) Quartz
Y: Y) Black
Z: Z) Green
Answer: W) W) White
Which of the following minerals shows two directions of cleavage? W) Hornblende X) Calcite Y) Olivine Z) Quartz
W: W) Hornblende
X: X) Calcite
Y: Y) Olivine
Z: Z) Quartz
Answer: W) W) Hornblende
In turtles and crocodiles, which factor plays a role in sex determination? W) Humidity X) Atmospheric pressure Y) Temperature Z) UV index
W: W) Humidity
X: X) Atmospheric pressure
Y: Y) Temperature
Z: Z) UV index
Answer: Y) Y) Temperature
Which of the following organisms is triploid? W) Aphid X) Escherichia coli Y) Seedless watermelon Z) Wheat
W: W) Aphid
X: X) Escherichia coli
Y: Y) Seedless watermelon
Z: Z) Wheat
Answer: Y) Y) Seedless watermelon
What is the current in amperes for a simple circuit with a potential difference of 100 V and two 10 Ω resistors in parallel?
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If polar ice caps melt, which of the following changes would be caused to Earth’s rotation? W) The moment of inertia of the Earth would increase X) The moment of inertia of the Earth would decrease Y) The angular momentum associated with the Earth’s rotation would increase Z) The angular momentum associated with the Earth’s rotation would decrease
W: W) The moment of inertia of the Earth would increase
X: X) The moment of inertia of the Earth would decrease
Y: Y) The angular momentum associated with the Earth’s rotation would increase
Z: Z) The angular momentum associated with the Earth’s rotation would decrease
Answer: W) W) The moment of inertia of the Earth would increase
How many kilowatt-hours do you use annually if you have a 14 W light bulb operating for 2,000 hours per year?
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Modern smart grid technology predominantly improves which component of the electricity system? W) Transmission and distribution X) Fuel extraction Y) Renewable energy generation Z) Fossil fuel energy generation
W: W) Transmission and distribution
X: X) Fuel extraction
Y: Y) Renewable energy generation
Z: Z) Fossil fuel energy generation
Answer: W) W) Transmission and distribution
The specific heat of an unknown metal is 0.230 J/g·°C. A 45.0 g sample is heated from 25.0 °C to 35.0 °C. How much heat in joules is required? W) 10.4 X) 104 Y) 342 Z) 600
W: W) 10.4
X: X) 104
Y: Y) 342
Z: Z) 600
Answer: X) X) 104
Providing your answers to the nearest integer, convert the following four pressures to atmospheres: 1) 203 kPa, 2) 2660 Torr, 3) 2.2 bar, and 4) 3700 mm Hg.
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If $$\frac{x - y}{x + y} = \frac{9}{13}$$, compute the value of $$\frac{x}{y}$$.
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The slope of a line is –2/3. The two points (4, 7) and (–2, y) are on the line. Determine the value of y.
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Normal faults suggest which of the following sorts of forces on the crust? W) Tension X) Shear Y) Compression Z) Listral
W: W) Tension
X: X) Shear
Y: Y) Compression
Z: Z) Listral
Answer: W) W) Tension
Which of the following is the metallicity of Population III stars as compared to that of the Sun? W) Much greater X) About the same Y) About one tenth as much Z) Much less than one tenth as much
W: W) Much greater
X: X) About the same
Y: Y) About one tenth as much
Z: Z) Much less than one tenth as much
Answer: Z) Z) Much less than one tenth as much
Which of the following is the name of the muscle in humans that extends the forearm? W) Triceps brachii X) Biceps brachii Y) Pronator teres Z) Brachialis
W: W) Triceps brachii
X: X) Biceps brachii
Y: Y) Pronator teres
Z: Z) Brachialis
Answer: W) W) Triceps brachii
Which foramen of the human skull houses the spinal cord? W) Foramen ovale X) Foramen incisivum Y) Foramen magnum Z) Foramen spinosum
W: W) Foramen ovale
X: X) Foramen incisivum
Y: Y) Foramen magnum
Z: Z) Foramen spinosum
Answer: Y) Y) Foramen magnum
For a small ball at the end of a string, calculate the angular momentum in J·s if the ball has mass 3 kg, tangential velocity 10 m/s, and orbit radius 10 m. W) 33.3 X) 100 Y) 300 Z) 900
W: W) 33.3
X: X) 100
Y: Y) 300
Z: Z) 900
Answer: Y) Y) 300
In a photoelectric experiment, if the intensity of the incident light is unchanged while its frequency is increased, which of the following is true? W) The number of photoelectrons emitted per second increases X) The maximum kinetic energy of the photoelectrons emitted increases Y) The maximum kinetic energy of the photoelectrons emitted decreases Z) The maximum kinetic energy of the photoelectrons emitted remains unchanged
W: W) The number of photoelectrons emitted per second increases
X: X) The maximum kinetic energy of the photoelectrons emitted increases
Y: Y) The maximum kinetic energy of the photoelectrons emitted decreases
Z: Z) The maximum kinetic energy of the photoelectrons emitted remains unchanged
Answer: X) X) The maximum kinetic energy of the photoelectrons emitted increases
Kirchhoff’s second law states that the directed sum of the voltage around any closed circuit is equal to what?
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If a 20-watt computer monitor is left on 5,000 hours per year, how much does it cost to operate per year if electricity costs \$0.15 per kWh?
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What type of white blood cell differentiates to form antibody-secreting cells and memory cells?
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Name all of the following four components of the human kidney that extend into the kidney medulla: 1) Proximal convoluted tubule; 2) Distal convoluted tubule; 3) Bowman’s capsule; 4) Ascending limb of the Loop of Henle.
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Which of the following is the maximum number of orbitals allowed when l = 5? W) 2 X) 5 Y) 11 Z) 13
W: W) 2
X: X) 5
Y: Y) 11
Z: Z) 13
Answer: Y) Y) 11
Rank the following four substances according to increasing boiling point: 1) Helium; 2) Water; 3) Ammonia; 4) Carbon monoxide.
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