A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47
Any modern jet is capable of breaking the sound barrier.
34
A small airplane can fly backwards.
75
In the early 1960's, Porsche commercially manufactured farm tractors.
24
Henry Ford produced the model T only in black because the black paint available at the time was the fastest to dry.
33
More than a billion transistors are manufactured every second.
-25
Castor oil is used as a lubricant in jet planes.
-5