HS Sample Set 5, Round 1 from NSB
When chemists do flame tests, they often view the flame through a colored transparent piece of glass to filter out any sodium contamination. What color glass do they use?
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Specifying the sign, what is the oxidation state of phosphorus in Na₂P₂O₆?
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What is the magnitude of the phase shift of the function y = sin x to y = 2 sin(3 x – π) – 4?
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An isosceles triangle has a base of 30 feet and height of 15 feet. In feet, how far apart are the legs 10 feet above the base?
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A charged particle moves through an area of space at a constant speed and direction. Which of the following statements is TRUE? W) There is no magnetic field X) There could be magnetic and electric fields oriented in the same direction Y) There could be magnetic and electric fields oriented perpendicularly to one another Z) There could be magnetic and electric fields oriented opposite to one another
W: W) There is no magnetic field
X: X) There could be magnetic and electric fields oriented in the same direction
Y: Y) There could be magnetic and electric fields oriented perpendicularly to one another
Z: Z) There could be magnetic and electric fields oriented opposite to one another
Answer: Y) Y) There could be magnetic and electric fields oriented perpendicularly to one another
A household appliance runs on 120 volts and has an internal resistance of 100 ohms. Providing your answer to the nearest integer, how much power, in watts, does this appliance use?
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What is the name of the hormone that controls metamorphosis in amphibians?
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In glycolysis, what is the net yield of ATP molecules generated per glucose molecule?
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What element has the lowest boiling point?
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Which of the following bonds is the MOST polar? W) B–C X) B–N Y) B–O Z) B–F
W: W) B–C
X: X) B–N
Y: Y) B–O
Z: Z) B–F
Answer: Z) Z) B–F
Which of the following is TRUE of beta particles? W) They have a charge equal and opposite to alpha particles X) They are more penetrating than gamma particles of the same energy Y) They are common decay products of alpha particles Z) They can be electrons or positrons
W: W) They have a charge equal and opposite to alpha particles
X: X) They are more penetrating than gamma particles of the same energy
Y: Y) They are common decay products of alpha particles
Z: Z) They can be electrons or positrons
Answer: Z) Z) They can be electrons or positrons
The resistance of a certain wire is 10 ohms. What would be the resistance in ohms if the radius of the wire were doubled?
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America’s first satellite, Explorer I, had all of the following technology aboard, EXCEPT: W) Internal and external temperature sensors X) Data transmitting antennas Y) Solar panels Z) Micrometeorite impact microphone
W: W) Internal and external temperature sensors
X: X) Data transmitting antennas
Y: Y) Solar panels
Z: Z) Micrometeorite impact microphone
Answer: Y) Y) Solar panels
Lightning is most likely to occur at what time of day: morning, afternoon, evening, or night?
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Given g = 10 m/s², if a ball is tossed upward at an initial velocity of 20 m/s, what will be its velocity in m/s at 2.5 s?
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The frequency of light from a laser radiation source is 6 × 10¹⁴ Hz. Using 3 × 10⁸ m/s as the speed of light, what is the wavelength of this light in nanometers?
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In terms of energy, which of the following happens after a skydiver reaches terminal velocity? W) Kinetic energy increases exponentially with distance X) Gravitational potential energy ceases to be present Y) Gravitational potential energy is converted into thermal energy Z) Kinetic energy increases linearly with distance
W: W) Kinetic energy increases exponentially with distance
X: X) Gravitational potential energy ceases to be present
Y: Y) Gravitational potential energy is converted into thermal energy
Z: Z) Kinetic energy increases linearly with distance
Answer: Y) Y) Gravitational potential energy is converted into thermal energy
Non-hydraulic elevators typically use very small motors and block and tackle pulleys. What system component helps reduce the amount of the car’s weight that the motor has to lift?
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If f(x) = x² – 3 and g(x) = 6 – x, what is the value of f(g(16))?
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According to Descartes’s Rule of Signs, what are the possible numbers of positive real roots that the following equation might have: x⁵ – 7x³ + 15x² + 3 = 10?
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Which of the following will NOT result from variations in the Moon’s orbital plane with respect to the Earth? W) The Moon will continue to cause solar eclipses X) The Moon will pass over the Earth’s North Pole Y) There will continue to be lunar eclipses Z) The apparent path of the Moon in the sky will vary
W: W) The Moon will continue to cause solar eclipses
X: X) The Moon will pass over the Earth’s North Pole
Y: Y) There will continue to be lunar eclipses
Z: Z) The apparent path of the Moon in the sky will vary
Answer: X) X) The Moon will pass over the Earth’s North Pole
What is the approximate average impact speed, in miles per hour, of a piece of orbital debris that strikes the Earth? W) 5,000 X) 10,000 Y) 20,000 Z) 30,000
W: W) 5,000
X: X) 10,000
Y: Y) 20,000
Z: Z) 30,000
Answer: Y) Y) 20,000
Applying Bernoulli’s principle to vortices, where in a vortex should the pressure be highest?
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Providing your answer as a decimal rounded to the nearest tenth, if a normal force of 1 newton is applied to the end of a fixed cylinder with a radius of 1 meter, what pressure, in pascals, is induced in the cylinder?
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In the atmosphere, what ion is formed by the oxidation of sulfur oxides?
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What do we call the transfer of a property of the atmosphere, such as heat, cold, or humidity, by the horizontal movement of an air mass?
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Absorption refrigeration is commonly used in co-generation facilities. It differs from traditional compressor refrigeration by which of the following key characteristics? W) Size X) It is heat-sourced Y) It is electrically-sourced Z) Temperature
W: W) Size
X: X) It is heat-sourced
Y: Y) It is electrically-sourced
Z: Z) Temperature
Answer: X) X) It is heat-sourced
By name or number, order the following four fuels from least to greatest amount of carbon dioxide produced annually from stationary combustion in the United States: 1) Wood; 2) Coal; 3) Natural gas; 4) Kerosene.
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Members of the order Gymnophiona, otherwise known as Caecilians, do NOT have which of the following? W) Poison glands X) Teeth Y) Elongated organs Z) Legs
W: W) Poison glands
X: X) Teeth
Y: Y) Elongated organs
Z: Z) Legs
Answer: Z) Z) Legs
What group of hormones is responsible for both phototropism and gravitropism?
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What is the measure in radians of an interior angle of a regular pentagon?
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Suppose, in a certain part of the world, in any 50-year period, the probability of a major plague is 39%, the probability of a major famine is 52%, and the probability of both a plague and a famine is 15%. Given that there is a plague, which of the following is the probability of a famine? W) 0.240 X) 0.288 Y) 0.370 Z) 0.385
W: W) 0.240
X: X) 0.288
Y: Y) 0.370
Z: Z) 0.385
Answer: Z) Z) 0.385
Submandibular, parotid, and lingual are adjectives referring to which type of gland?
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By name or number, identify all of the following five events that could trigger secondary succession: 1) Forest fire; 2) Hurricane; 3) Lava flow; 4) Flood; 5) Tsunami.
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Which of the following BEST describes the process of coal liquefaction? W) It converts coal into synthetic fuels X) It reduces carbon dioxide emissions in coal plants Y) It removes sulfur from coal in coal plants Z) It converts coal into an easily transportable form
W: W) It converts coal into synthetic fuels
X: X) It reduces carbon dioxide emissions in coal plants
Y: Y) It removes sulfur from coal in coal plants
Z: Z) It converts coal into an easily transportable form
Answer: W) W) It converts coal into synthetic fuels
Which of the following is a disadvantage of flexible fuel vehicles? W) They get about 25% fewer miles per gallon when fueled with E85 X) They experience significant loss in power when operating on E85 Y) They are very different than gasoline-only models Z) The technology is untested
W: W) They get about 25% fewer miles per gallon when fueled with E85
X: X) They experience significant loss in power when operating on E85
Y: Y) They are very different than gasoline-only models
Z: Z) The technology is untested
Answer: W) W) They get about 25% fewer miles per gallon when fueled with E85
An elephant steps on an electrical extension cord that is connected to a lit lamp. Assuming that the lamp remains plugged in and the cord unbroken, which of the following happens to the light intensity coming from the lamp? W) It goes out X) It becomes dimmer Y) It becomes brighter Z) It is unchanged
W: W) It goes out
X: X) It becomes dimmer
Y: Y) It becomes brighter
Z: Z) It is unchanged
Answer: Z) Z) It is unchanged
If a fuse can dissipate 600 watts of power without blowing, how much current, in amperes, can it pass at 120 volts without melting?
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Which of the following BEST explains why water molds are NOT classified as fungi? W) They have cell walls of cellulose and produce motile spores X) They are decomposers Y) They are multinucleate Z) They have cell walls of chitin and when aggregated function like a multicellular organism
W: W) They have cell walls of cellulose and produce motile spores
X: X) They are decomposers
Y: Y) They are multinucleate
Z: Z) They have cell walls of chitin and when aggregated function like a multicellular organism
Answer: W) W) They have cell walls of cellulose and produce motile spores
By name or number, identify all of the following five choices that are considered embryophyta: 1) Gymnosperms; 2) Diatoms; 3) Mosses; 4) Dinoflagellates; 5) Ferns.
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If the median of the five numbers 1, 7, 14, 28, and x is 10, what is x?
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To what value does the geometric series that starts 1/3 + 1/9 + 1/27 + … converge?
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Which of the following substances has the highest boiling point? W) Water X) Methanol Y) Ethyl alcohol Z) Diethyl ether
W: W) Water
X: X) Methanol
Y: Y) Ethyl alcohol
Z: Z) Diethyl ether
Answer: W) W) Water
The pressure of 2 moles of an ideal gas at 27 °C is 1.2 atm. Providing your answer to the nearest tenth, if the temperature is increased by 100 °C and the volume of the gas doubles, what is the new pressure of the gas in atmospheres?
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What geologic features of Io are responsible for loading Jupiter’s atmosphere with heavy ionized particles?
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On Mars, how do the ages of the higher elevation and heavily cratered southern highlands compare to the ages of the lower elevation and flat northern lowlands?
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What is the common name given to the industrial reaction in which nitrogen and hydrogen are reacted with a catalyst, forming ammonia?
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What is the molecular formula for strontium nitrite?
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The drug Digoxin from the Digitalis plant slows the reuptake of calcium by the sarcoplasmic reticulum. What is the effect of this on the strength and rate of heart contractions? W) Strengthens and slows the heartbeat X) Strengthens and speeds the heartbeat Y) Weakens and slows the heartbeat Z) Weakens and speeds the heartbeat
W: W) Strengthens and slows the heartbeat
X: X) Strengthens and speeds the heartbeat
Y: Y) Weakens and slows the heartbeat
Z: Z) Weakens and speeds the heartbeat
Answer: W) W) Strengthens and slows the heartbeat
In eudicots, lateral roots arise from the mitotic activity of which tissue layer?
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