Sodium metal is
A) oxidized in the production of aluminum.
B) reduced in the production of aluminum.
C) both oxidized and reduced in the production of aluminum.
D) neither oxidized nor reduced in the production of aluminum.
Answer: A
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Time Dilation: A spaceship enters the solar system moving toward the sun at a constant speed relative to the sun. By its own clock, the time elapsed between the time it crosses the orbit of Jupiter and the time it crosses the orbit of Mars is 50.0 minutes. As measured in the coordinate system of the sun, how long did it take for the spaceship to travel that distance? The radius of the orbit of Jupiter is 778 × 109 m, and that of the orbit of Mars is 228 × 109 m.
A. 30.0 minutes B. 43.6 minutes C. 58.6 minutes D. 69.8 minutes E. 95.8 minutes
What is the critical angle for light traveling from crown glass (n = 1.52 ) into water (n = 1.33 )?
A) 42° B) 48° C) 53° D) 57° E) 61°
A locomotive is pulling three wagons along a level track with a force of 100,000 N. The wagon next to the locomotive has a mass of 70,000 kg, the next one, 50,000 kg, and the last one, 80,000 kg. Neglect friction
What is the force between the 70,000-kg and 50,000-kg wagons? A) 35,000 N B) 40,000 N C) 50,000 N D) 60,000 N E) 65,000 N
The striking gap between Saturn's A and B rings is called the ________
Fill in the blank(s) with correct word