Jumbo jets use 4,000 gallons of fuel to take off.
19
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Sony researchers have developed a refrigerator that only opens when you smile.
9
A toaster uses almost half as much energy as a full-sized oven.
33
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47
A small airplane can fly backwards.
75
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
The ball on top of a flagpole is called a 'truck'.
24