Which one of the following objects is most like the planetesimals that formed in the solar nebula?
a. asteroids
b. Earth
c. Saturn
d. Venus
e. the sun
A
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Like Jupiter's other icy moons, Europa is covered with craters
Indicate whether the statement is true or false
An optical fiber is 1.0 meter long and has a diameter of 20 ?m. Its ends are perpendicular to its axis. Its index of refraction is 1.30
What is the maximum number of reflections a light ray entering one end will make before it emerges from the other end? A) 84,000 B) 42,000 C) 26,000 D) 24,000 E) 18,000
At what speed must a 150-kg football player be moving to have the same momentum as a 15.0-g bullet traveling at 300 m/s?
A) 10.0 m/s B) 3.00 cm/s C) 3.00 m/s D) 30.0 m/s E) 1.00 m/s
Titan's surface is mainly composed of _____
A) liquid hydrogen B) ices of hydrogen and water C) liquid helium D) ices of water and methane