What is an axis of an object?

An axis is an invisible line around which an object rotates, or spins. The points where an axis intersects with an object’s surface are the object’s North and South Poles. Each planet in our solar system rotates on its axis.

What does axis mean in astronomy?

an imaginary straight line around which an object spins. Sentences: Earth spins on its axis once every 24 hours. Earth’s axis goes from the North Pole through Earth’s center to the South Pole and is tilted.

What is meant by the term arsenal of democracy?

The slogan “Arsenal of democracy” refers to the collective efforts of American industry in supporting the Allies, which efforts tended to be concentrated in the established industrial centers of the U.S., such as Detroit, Cleveland, Chicago, New York, Philadelphia, and Pittsburgh, and other places.

What was the purpose of the arsenal of democracy?

Arsenal of Democracy was a phrase used by President Franklin D. Roosevelt (1882–1945) to describe the United States as he tried to arouse popular support for sending military aid to nations fighting against the Axis powers (Germany, Italy, and Japan, among others) during World War II (1939–1942).

Which is an example of an axis in astronomy?

An axis is an imaginary reference line drawn through an object. In astronomy, axis usually refers to the line about which an object rotates. For example, the Earth’s rotation axis passes through the north and south poles, and can be extended onto the celestial sphere where it passes through the north and south celestial poles.

Which is the best definition of the word axis?

noun, plural ax·es [ak-seez] /ˈæk siz/. the line about which a rotating body, such as the earth, turns. axis deer. a real or imaginary line about which a body, such as an aircraft, can rotate or about which an object, form, composition, or geometrical construction is symmetrical any of several S Asian deer of the genus Axis, esp A. axis.

Which is the best definition of the word Arsenal?

1a : an establishment for the manufacture or storage of arms and military equipment The city is home to a federal arsenal. Synonyms for arsenal.

When does the axis of an object run through its center of mass?

In either case, an object’s axis runs through its center of mass, or barycenter. An object’s center of mass is a point where an outside force acting on the object acts as if the object were located at just that point—where the object appears “balanced.”