The rulers of this country's empire of Axum were said to be descendants of the Queen of Sheba.

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Action potentials travel through this long part of a neuron toward the synapse.

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External force vectors are drawn as arrows on these diagrams of mechanics problems, which often show the object of interest as a block. They are sometimes called force diagrams.

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"A" is a 2 by 2 matrix whose top row is (2, 3) and whose bottom row is (3, 5). "A" is NOT a singular matrix because what property of A is nonzero? For a 2 by 2 matrix, this property may be calculated as ad minus bc.

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In the book Liber abbaci, these numbers are used to model rabbit populations.

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"Old Ironsides" was written by this 19th-century poet of "The Last Leaf."

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An afterword to this 1913 play reveals that Colonel Pickering eventually helps Eliza Doolittle to open her own flower shop.

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Many musical traditions, such as blues and jazz, are based on a musical scale named for this many notes.

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In one painting by this Spanish artist, a man stabs at a soldier in red breeches who is falling off a white horse.

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Plate tectonics has supplanted what theory formulated by Alfred Wegener to explain the apparent jigsaw puzzle-like fit of Earth's continents?

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What fictitious force is experienced by those moving with respect to a rotating reference frame?

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This company's "Smart Mobility" unit was created under Jim Hackett, who was its CEO from 2017-2020.

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Henri Matisse, who attended Gertrude Stein's salons, was one of the leading painters of this art movement. Its name derived from a critic who referred to its painters as "wild beasts."

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The phrase "trial of the century" was used during the trial of Bruno Hauptmann, who kidnapped and murdered the son of this American aviator.

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Name this Englishman who ceded the Sudetenland [zoo-DAY-ten-LANT] region of Czechoslovakia to Nazi Germany by signing the Munich Agreement.

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Citrine is a yellow variant of what silicate mineral that defines 7 on the Mohs hardness scale?

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This method, in which primers anneal to a sample that undergoes heating and cooling cycles, is credited to Nobel winner Kary Mullis. Name this technique that amplifies a sample of genetic material.

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How many possible values can a logical proposition have?

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What logical operation returns true when one input is true and the other is false, and returns false for any other combination of inputs?

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