A small airplane can fly backwards.
75
The ball on top of a flagpole is called a 'truck'.
24
A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
Whale oil was used in automobile transmissions as late as 1973.
56
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
The United States produces enough plastic film annually to cover the entire state of Texas.
13