A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
The first alarm clock could only ring at 4 a.m.
120
Technically speaking, crystal glass is actually a Liquid that flows very slowly.
43
Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
1
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60
Kleenex tissues were originally used as filters in gas masks.
46
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
The first hard drive available for the Apple II had a capacity of only 5 megabytes.
46