What is the Celestial Equator?

A. a band of constellations through which the planets and Sun appear to move
B. the cycle of lunar phases
C. the line that the Sun traces across the celestial sphere
D. an imaginary line in the sky, directly above Earth's equator


Answer: D

Physics & Space Science

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If heat is flowing from a table to a block of ice moving across the table, which of the following must be true?

a. The table is rough, and there is friction between the table and ice. b. The ice is cooler than the table. c. The ice is changing phase. d. All three are possible, but none is absolutely necessary.

Physics & Space Science

The reddish particles in Jupiter's ring are less than 1 percent as reflective as Saturn's whiter particles. Saturn's ring particles are thought to be ____________while Jupiters are thought to be ____________

a. icy; rocky b. rocky; icy c. icy; also icy d. rocky; also rocky

Physics & Space Science

Some meteorites that survive the plunge to Earth's surface contain organic compounds

Indicate whether the statement is true or false

Physics & Space Science

An ideal transformer consists of a 500-turn primary coil and a 2000-turn secondary coil. If the current in the secondary is 3.0 A, what is the current in the primary?

A) 0.75 A B) 1.3 A C) 12 A D) 48 A E) 24 A

Physics & Space Science