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What is the refractive index of vacuum? (40 points)

	undefined
	0
	10
	1
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written by sam • topics: science block unblock • physics block unblock • light block unblock • speed block unblock • general block unblock

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What is the speed of sound at sea level (approx.)? (20 points)

	5000 mph (2235 m/s)
	1000 mph (447 m/s)
	500 mph (223 m/s)
	750 mph (345 m/s)
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written by sam • topics: science block unblock • physics block unblock • sound block unblock • speed block unblock • airplanes block unblock and 2 more » • Aircrafts • waves

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Which was the first ever speed limit? (30 points)

	15 mph (30 km/h)
	2 mph (3 km/h)
	4 mph (6 km/h)
	10 mph (20 km/h)
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written by runofthelamb • topics: history block unblock • automobiles block unblock • speed block unblock • traffic block unblock • Laws block unblock and 3 more » • automotive • Law • cars

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What year did the first auto race in the United States take place? (40 points)

	1903
	1890
	1910
	1895
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written by runofthelamb • topics: auto racing block unblock • speed block unblock • firsts block unblock • cars block unblock • automobiles block unblock

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Standing on the equator of the Earth how fast would you have to travel to always be in sunlight? (ignoring possible cloud cover) (40 points)

	1038km/h (645mph)
	2542km/h (1580mph)
	1670km/h (1038mph)
	3212km/h (1996mph)
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written by MrPumpernickel • topics: earth block unblock • mathematics block unblock • speed block unblock • geography block unblock • math block unblock and 2 more » • science • astronomy

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How many miles per hour is the current world land speed record? (40 points)

	802
	763
	617
	508
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written by jsavimbi • topics: records block unblock • speed block unblock • cars block unblock • automotive block unblock • sound barrier block unblock

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