Which of the following statements about the celestial equator is true at all latitudes?
A) It extends from your horizon due north, through your zenith, to your horizon due south.
B) It cuts the dome of your local sky exactly in half.
C) It represents an extension of Earth's equator onto the celestial sphere.
D) It lies along the band of light we call the Milky Way.
E) It extends from your horizon due east, through your zenith, to your horizon due west.
C
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Resonance occurs when
a. two different objects vibrate with different frequencies. b. two different objects produce beats. c. an object having a certain natural frequency is set in vibration by a second object vibrating at that frequency. d. an object produces a sound.
One ampere is equivalent to
A. 1 C/s. B. 1 ohm/volt. C. 1 V/m. D. 1 N/C. E. 1 J/s.
If distance from the Sun were the only factor affecting surface habitability, which of the following would be habitable?
A) the Moon B) Venus C) Mercury D) all of these
Why must both parallax and proper motion be known to give transverse velocity?
What will be an ideal response?