HS Sample Set 2, Round 2 from NSB
Which of the following elements is paramagnetic? W) Manganese X) Neon Y) Silver Z) Zinc
W: W) Manganese
X: X) Neon
Y: Y) Silver
Z: Z) Zinc
Answer: W) W) Manganese
Which of the following group 6A hydrides has the highest boiling point? W) H₂O X) H₂S Y) H₂Se Z) H₂Te
W: W) H₂O
X: X) H₂S
Y: Y) H₂Se
Z: Z) H₂Te
Answer: W) W) H₂O
Which of the following pairs of baleen whales lacks a dorsal fin? W) Northern right whale and bowhead whale X) Narwhal and blue whale Y) Fin whale and sei whale Z) Bryde’s whale and minke whale
W: W) Northern right whale and bowhead whale
X: X) Narwhal and blue whale
Y: Y) Fin whale and sei whale
Z: Z) Bryde’s whale and minke whale
Answer: W) W) Northern right whale and bowhead whale
In Sanger and cycle DNA sequencing, the absence of a hydroxyl on which position of the ribose ring in a dideoxyribonucleoside triphosphate, or ddNTP, is responsible for nucleotide chain termination?
Acceptable Answers:
Which of the following substances contains the most Btus per pound? W) Peat X) Gasoline Y) Hydrogen Z) Charcoal
W: W) Peat
X: X) Gasoline
Y: Y) Hydrogen
Z: Z) Charcoal
Answer: Y) Y) Hydrogen
Approximately how much power in watts is consumed by, respectively, five 120 V incandescent light bulbs consuming 0.5 A each compared to five compact fluorescent lamp bulbs producing the equivalent lumens? W) 120 versus 25 X) 300 versus 65 Y) 330 versus 220 Z) 600 versus 300
W: W) 120 versus 25
X: X) 300 versus 65
Y: Y) 330 versus 220
Z: Z) 600 versus 300
Answer: X) X) 300 versus 65
Which of the following types of sand dunes form under winds that blow in one direction? W) Barchan X) Linear Y) Star Z) Parabolic
W: W) Barchan
X: X) Linear
Y: Y) Star
Z: Z) Parabolic
Answer: W) W) Barchan
Which of the following is the most direct proof that the Earth is NOT stationary? W) The existence of ocean tides X) Kepler’s third law Y) The increased accuracy of the Copernican model over the Ptolemaic model Z) The Coriolis force
W: W) The existence of ocean tides
X: X) Kepler’s third law
Y: Y) The increased accuracy of the Copernican model over the Ptolemaic model
Z: Z) The Coriolis force
Answer: Z) Z) The Coriolis force
A plane wave of red light goes from the air into a glass block. Which of the following describes how the wave changes? W) The frequency decreases X) The speed increases Y) The wavelength decreases Z) The amplitude increases
W: W) The frequency decreases
X: X) The speed increases
Y: Y) The wavelength decreases
Z: Z) The amplitude increases
Answer: Y) Y) The wavelength decreases
Imagine a uniform meter stick supported on a knife edge at the 40 cm mark. The right end of the meter stick with the 100 cm mark swings down. To balance the meter stick, at what centimeter mark should you hang an object with mass equal to that of the meter stick?
Acceptable Answers:
If one exterior angle of a regular convex polygon measures 40°, how many sides does the polygon have?
Acceptable Answers:
A circle is inscribed within a square. The diagonal of the square has a length of 6 cm. Providing your answer in simplest form, what is the circumference of the circle in centimeters?
Acceptable Answers:
Blue light has a frequency of about 7.0 × 10¹⁴ Hz. Which of the following is the wavelength of this light in centimeters? W) 4.3 × 10⁻⁵ X) 8.4 × 10⁻⁸ Y) 3.1 × 10⁻¹² Z) 2.0 × 10⁻²⁴
W: W) 4.3 × 10⁻⁵
X: X) 8.4 × 10⁻⁸
Y: Y) 3.1 × 10⁻¹²
Z: Z) 2.0 × 10⁻²⁴
Answer: W) W) 4.3 × 10⁻⁵
Your teacher wants you to use the Clausius–Clapeyron equation to determine the vapor pressure at a particular temperature. Assuming you know the value for the gas constant, what other two values must you be given?
Acceptable Answers:
Which of the following is NOT an even-toed ungulate? W) Hippopotamus X) Rhinoceros Y) Kudu Z) Klipspringer
W: W) Hippopotamus
X: X) Rhinoceros
Y: Y) Kudu
Z: Z) Klipspringer
Answer: X) X) Rhinoceros
Name all of the following four trees that have an alternate branching pattern rather than an opposite pattern: 1) Box elder; 2) Paulownia; 3) White oak; 4) Ash.
Choices:
Correct Answers:
If a water heater uses 20 ft³ of natural gas in 30 minutes and natural gas contains 1,000 Btu per ft³, what is the hourly input rating of the water heater in Btu per hour?
Acceptable Answers:
What physical property is used to rate building insulation?
Acceptable Answers:
The end of which of the following time periods marked the greatest mass extinction event in Earth’s history? W) Precambrian X) Cambrian Y) Permian Z) Cretaceous
W: W) Precambrian
X: X) Cambrian
Y: Y) Permian
Z: Z) Cretaceous
Answer: Y) Y) Permian
Which of the following does NOT accurately describe the Hawaiian islands? W) They were formed by undersea volcanoes X) They are mostly made up of basalts Y) They are associated with a mid-Pacific convergent plate boundary Z) They are the projecting tops of the tallest mountain range in the world
W: W) They were formed by undersea volcanoes
X: X) They are mostly made up of basalts
Y: Y) They are associated with a mid-Pacific convergent plate boundary
Z: Z) They are the projecting tops of the tallest mountain range in the world
Answer: Y) Y) They are associated with a mid-Pacific convergent plate boundary
Two identical positively charged spheres are separated by a distance much bigger than their radii so that electric and gravitational forces are balanced. If the mass of each object is multiplied by 4, by what factor should the charge on each be multiplied so that the two forces still balance? W) 2 X) 4 Y) 8 Z) 16
W: W) 2
X: X) 4
Y: Y) 8
Z: Z) 16
Answer: X) X) 4
A car is travelling at a constant 30 m/s for 10 s. The car then undergoes constant deceleration for 5 s, coming to a stop. How far in meters did the car travel during the entire 15 s time interval?
Acceptable Answers:
The values of a, b, c, and d are 0, 1, 2, and 3, although not necessarily in that order. What is the maximum value of c·aᵇ – d? W) 6 X) 8 Y) 9 Z) 12
W: W) 6
X: X) 8
Y: Y) 9
Z: Z) 12
Answer: Y) Y) 9
Find the coordinates of all points of intersection between the graphs of y = –x² + x and y = |3x + 3|.
Acceptable Answers:
Which of the following statements is NOT true? W) Liquids with weak intermolecular forces tend to have high surface tension X) Liquids with strong intermolecular forces tend to have high surface tension Y) Liquids with weak intermolecular forces tend to have high vapor pressures Z) Cohesion forces refer to intermolecular attractions between like molecules
W: W) Liquids with weak intermolecular forces tend to have high surface tension
X: X) Liquids with strong intermolecular forces tend to have high surface tension
Y: Y) Liquids with weak intermolecular forces tend to have high vapor pressures
Z: Z) Cohesion forces refer to intermolecular attractions between like molecules
Answer: W) W) Liquids with weak intermolecular forces tend to have high surface tension
Which of the following gases will exhibit the greatest deviation from ideal gas behavior? W) Carbon dioxide X) Methane Y) Sulfur dioxide Z) Molecular oxygen
W: W) Carbon dioxide
X: X) Methane
Y: Y) Sulfur dioxide
Z: Z) Molecular oxygen
Answer: Y) Y) Sulfur dioxide
The Ampullae of Lorenzini are used to sense which of the following stimuli? W) Mechanical vibrations X) Chemicals Y) Electrical currents Z) Light
W: W) Mechanical vibrations
X: X) Chemicals
Y: Y) Electrical currents
Z: Z) Light
Answer: Y) Y) Electrical currents
Name all of the following four organisms that are members of the phylum Platyhelminthes: 1) Tapeworms; 2) Nematodes; 3) Blood flukes; 4) Sea slugs.
Choices:
Correct Answers:
Which of the following types of lava is the sole lava erupted on the island of Hawaii? W) Komatiite X) Basalt Y) Andesite Z) Rhyolite
W: W) Komatiite
X: X) Basalt
Y: Y) Andesite
Z: Z) Rhyolite
Answer: X) X) Basalt
Which of the following planets has the longest day? W) Mercury X) Venus Y) Mars Z) Jupiter
W: W) Mercury
X: X) Venus
Y: Y) Mars
Z: Z) Jupiter
Answer: X) X) Venus
Which of the following is the effect on the resistance of a wire if it is replaced with an equally thick wire of a material of higher resistivity and longer length? W) The effect cannot be predicted without knowing the actual value of the resistivities of the materials X) Resistance increases Y) Resistance decreases Z) Resistance is unchanged
W: W) The effect cannot be predicted without knowing the actual value of the resistivities of the materials
X: X) Resistance increases
Y: Y) Resistance decreases
Z: Z) Resistance is unchanged
Answer: X) X) Resistance increases
A 2 H inductance coil is connected in series to a 100 Ω resistor to create an LR circuit. If this circuit is connected to a 12 V power supply, what are, respectively, the initial current in the circuit and the final current in the circuit after it has been connected for a long time, both measured in amperes?
Acceptable Answers:
What are the coordinates of the vertex of the parabola with equation $$y = 8 + (x + 5)(x - 3)$$?
Acceptable Answers:
Determine the coordinates of each inflection point for the graph of $$f(x) = \displaystyle\frac{1}{3}x^3 - x^2 - 35x$$.
Acceptable Answers:
Assuming each of the following is in an aqueous solution with a 1 M concentration, which of the following solutions would have the highest conductivity at room temperature? W) Potassium hydroxide X) Aluminum nitrate Y) Magnesium chloride Z) Iron (II) sulfate
W: W) Potassium hydroxide
X: X) Aluminum nitrate
Y: Y) Magnesium chloride
Z: Z) Iron (II) sulfate
Answer: X) X) Aluminum nitrate
The pH of aqueous hydrogen cyanide most accurately represents which of the following? W) The negative base-10 logarithm of the initial molar hydronium ion concentration X) The negative base-10 logarithm of the equilibrium molar hydronium ion concentration Y) The negative base-10 logarithm of the initial molar hydrogen cyanide concentration Z) The negative base-10 logarithm of the equilibrium molar hydrogen cyanide concentration
W: W) The negative base-10 logarithm of the initial molar hydronium ion concentration
X: X) The negative base-10 logarithm of the equilibrium molar hydronium ion concentration
Y: Y) The negative base-10 logarithm of the initial molar hydrogen cyanide concentration
Z: Z) The negative base-10 logarithm of the equilibrium molar hydrogen cyanide concentration
Answer: X) X) The negative base-10 logarithm of the equilibrium molar hydronium ion concentration
Hatchetfish control their luminescence using which of the following specialized organs? W) Photophores X) Chromophores Y) Siphonophores Z) Sipunculids
W: W) Photophores
X: X) Chromophores
Y: Y) Siphonophores
Z: Z) Sipunculids
Answer: W) W) Photophores
Which of the following is the genus for the primary insect vector for African sleeping sickness? W) Cimex X) Musca Y) Glossina Z) Culex
W: W) Cimex
X: X) Musca
Y: Y) Glossina
Z: Z) Culex
Answer: Y) Y) Glossina
Which of the following states has the highest potential for wind energy generation? W) Illinois X) Arkansas Y) Michigan Z) North Dakota
W: W) Illinois
X: X) Arkansas
Y: Y) Michigan
Z: Z) North Dakota
Answer: Z) Z) North Dakota
To heat a cup of water in a microwave takes about 0.01 kWh. Providing your answer to the nearest tenth, about how many minutes should you need to heat it if it is exposed to 1,000 W of microwave energy?
Acceptable Answers:
Which of the following gases is the most prevalent in volcanic eruptions? W) Water vapor X) Methane Y) Carbon dioxide Z) Carbon monoxide
W: W) Water vapor
X: X) Methane
Y: Y) Carbon dioxide
Z: Z) Carbon monoxide
Answer: W) W) Water vapor
Which major ocean has the highest salinity?
Acceptable Answers:
A top that is spinning on a table begins to precess. Which of the following would decrease the rate of precession of the top? W) An increase in the torque that the top experiences due to gravity X) A decrease in its moment of inertia Y) A decrease in its angular velocity Z) An increase in its angular velocity
W: W) An increase in the torque that the top experiences due to gravity
X: X) A decrease in its moment of inertia
Y: Y) A decrease in its angular velocity
Z: Z) An increase in its angular velocity
Answer: Z) Z) An increase in its angular velocity
Two parallel plates of equal area are separated by a distance of 20 mm. If the plates are connected to a 12 V battery, providing your answer in scientific notation with one significant figure, what is the magnitude of the electrostatic force in newtons that a microcoulomb charge between the plates would feel?
Acceptable Answers:
State an equation for the graph that results when the graph of y = cos(x) is stretched vertically by a factor of 5 and is shifted π/2 units to the right.
Acceptable Answers:
Providing your answer in simplest form, what is the distance from the origin to the line y = x + 1?
Acceptable Answers:
If the molar mass of chlorine is 35 g/mol, of oxygen is 16 g/mol, and of hydrogen is 1 g/mol, what is the molar mass in grams per mole of hypochlorous acid?
Acceptable Answers:
Which of the following can behave as a Lewis acid, but NOT as a Brønsted–Lowry acid? W) NH₃ X) H₂CO₃ Y) BF₃ Z) HSO₃⁻
W: W) NH₃
X: X) H₂CO₃
Y: Y) BF₃
Z: Z) HSO₃⁻
Answer: Y) Y) BF₃
Pyrolobus fumarii, an extreme thermophile, would be found in which of the following marine habitats? W) Photic zone X) Neritic zone Y) Benthic zone Z) Littoral zone
W: W) Photic zone
X: X) Neritic zone
Y: Y) Benthic zone
Z: Z) Littoral zone
Answer: Y) Y) Benthic zone
There are three cupboards labeled “Rodentia”, “Lagomorpha,” and “Chiroptera”. You have four taxidermy specimens: a pika, a fruit bat, a guinea pig, and a skunk to be correctly stored in the cupboards. One of these specimens does not fit into the three available cupboards and thus you will need to label a fourth cupboard. What should be the label on the fourth cupboard, and which animal would you place in that cupboard?
Acceptable Answers: