Two lightning bolts are seen to strike two distant locations at the same time. Seen from a different location, the two lightning bolts
A) will also be seen at the same time.
B) will not be seen at the same time.
C) may or may not be seen at the same time.
Answer: C
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The ____________________ is a region around a star where liquid water can exist
Fill in the blank(s) with correct word
What may have caused Mercury to have a large metallic core and a relatively thin crust?
a. a large impact b. tidal coupling with the Sun c. solar wind clearing the nebula d. a slow orbital period e. a long period of flooding
Planet Zero has a mass of 5.0 × 10^23 kg and a radius of 2.0 × 10^6 m. A space probe is launched vertically from the surface of Zero with an initial speed of 4.0 km/s. What is the speed of the probe when it is 3.0 × 10^6 m from Zero's center?
a. 3.0 km/s b. 2.2 km/s c. 1.6 km/s d. 3.7 km/s e. 5.9 km/s
The main producer of sediment is
A) mechanical weathering. B) ice wedging. C) chemical Weathering. D) erosion.