If we represent the Milky Way Galaxy as the size of a grapefruit, the distance to the Andromeda Galaxy would be about
A) 3 cm. B) 3 km. C) 30 m. D) 3 m. E) 300 km.
D
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__________are electromagnetic waves with wavelength shorter than ultraviolet (UV) light
A) Visible rays B) X-rays C) Microwaves D) Radio waves
A lunar eclipse that occurs when the Moon moves completely into Earth's umbral shadow is called a _____
A) total solar eclipse B) penumbral lunar eclipse C) partial solar eclipse D) total lunar eclipse
Which of the following is the origin of almost all the large moons around the jovian planets?
A) They are captured planets. B) They are captured asteroids. C) They were formed by giant impacts. D) They were formed by condensation and accretion in a disk of gas around the planet. E) They are captured comets.
A sound with ten times the amplitude of another sound is judged to be
a. twice as loud c. 10 dB higher in sound level b. ten times as loud d. 20 dB higher in sound level